JP7409651B2 - automatic valve cleaning system - Google Patents

Description

The automatic valve cleaning system according to the present application relates to a technique for cleaning a valve port in an automatic valve that automatically discharges fluid such as drain.

Examples of automatic valves include steam traps and air traps. Steam traps and air traps are installed throughout piping systems installed in industrial plants, etc. to transfer steam and compressed gas (air, gas, etc.). It discharges the gas out of the piping as appropriate, and operates to prevent steam and compressed gas from leaking as much as possible.

There are various structures for steam traps and air traps, but float type traps have a hollow float built into the valve chamber. Normally, this float blocks the orifice, which is a valve opening formed near the bottom of the valve chamber, but when condensate flows into the valve chamber, the float floats up as the condensate accumulates, blocking the orifice. Open. When the orifice is opened, the condensate accumulated in the valve chamber is automatically discharged from the orifice toward the condensate recovery pipe under the force of high pressure within the pipe. After the drain is discharged, the float descends and returns to its position, again blocking the orifice.

Here, foreign matter such as rust or scale (water scale) may enter the valve chamber of the steam trap or air trap together with the inflowing drain. If such foreign matter adheres to and accumulates in the orifice, the orifice is blocked and clogged by the foreign matter, making it impossible to properly discharge drain even if the float floats up.

In particular, the orifice is formed to have a small diameter in relation to the contact surface of the float, so it is likely to be clogged by foreign matter. For this reason, steam traps and air traps are sometimes provided with a cleaning mechanism for removing foreign matter that has adhered to or accumulated in the orifice.

As a steam trap provided with such a cleaning mechanism, there is a technique disclosed in Patent Document 1 mentioned below. This steam trap includes a cleaning member 30 that can move forward and backward toward the orifice of the drain discharge passage 16. A bimetal 22 that expands and contracts in response to temperature changes is attached to this cleaning member 30.

When the orifice of the discharge passage 16 becomes clogged and the temperature of the steam trap decreases due to the accumulation of condensate, the bimetal 22 expands in response to this temperature drop, and the cleaning member 30 is inserted into the orifice of the discharge passage 16 (small diameter portion 16a). Enter and remove foreign matter. When the drain is properly discharged and high temperature steam enters the steam trap and its temperature rises, the bimetal 22 contracts and the cleaning member 30 is retracted from the discharge passage 16 and returned to its position.

Patent No. 6022733

In the steam trap disclosed in Patent Document 1, when a temperature drop occurs in the steam trap due to retention of drain, the cleaning member 30 enters the orifice of the discharge passage 16 based on this to remove foreign matter. However, it takes some time for the temperature of the steam trap to drop due to the influence of condensate retention. For this reason, there is a problem in that the clogging condition cannot be cleared quickly.

Furthermore, unlike a steam trap, high temperature steam or condensate does not flow into the air trap, so even if the orifice becomes clogged with foreign matter, the temperature will not drop. Therefore, even if the technique disclosed in Patent Document 1 mentioned above is applied, the bimetal that responds to temperature changes does not expand or contract, and the clogged air trap cannot be properly cleaned.

Therefore, the automatic valve cleaning system according to the present application aims to solve these problems, and aims to provide an automatic valve cleaning system that can quickly and reliably eliminate the clogged state.

The automatic valve cleaning system according to the present application is
A basic automatic valve that receives the inflow of target fluid from the basic inflow path and automatically discharges the target fluid toward the basic discharge path;
An auxiliary automatic valve placed above the basic automatic valve, which prevents the target fluid from flowing in from the branch inflow path connected to the basic inflow path when a predetermined abnormal condition occurs in the basic automatic valve. auxiliary automatic valve that automatically discharges the target fluid toward the auxiliary discharge path;
An automatic valve cleaning system comprising:
The basic automatic valve is
an internal flow path provided inside and through which the target fluid flows;
a valve port that is provided on the internal flow path and allows the target fluid to pass;
Opening/closing means that automatically opens the valve port based on the inflow of the target fluid from the basic inflow path;
A cleaning means arranged to be able to enter or retreat from the valve port, which takes in the target fluid discharged by the auxiliary automatic valve toward the auxiliary discharge path, and enters the valve port based on the target fluid. cleaning means,
It is equipped with
It is characterized by

In the automatic valve cleaning system according to the present application, when a predetermined abnormal condition occurs in the basic automatic valve, the auxiliary automatic valve receives the target fluid from the branch inflow path connected to the basic inflow path, and automatically Discharge the target fluid toward the auxiliary discharge channel. The cleaning means included in the basic automatic valve takes in the target fluid discharged toward the auxiliary discharge path by the auxiliary automatic valve, and enters the valve port based on the target fluid.

Therefore, when an abnormal condition such as a clogged condition occurs in the basic automatic valve, the cleaning means enters the valve port portion, so that the clogged condition of the valve port portion can be quickly and reliably cleared.

1 is a block diagram showing the overall configuration of an automatic valve cleaning system according to the present application. FIG. 2 is a sectional view showing the configuration of the lower trap 1 shown in FIG. 1. FIG. 3 is an enlarged cross-sectional view of the vicinity of the cylinder 20 shown in FIG. 2, and is a cross-sectional view showing a state in which the piston 2 and the cleaning bar 3 are moved halfway forward. FIG. 3 is an enlarged cross-sectional view of the vicinity of the cylinder 20 shown in FIG. 2, showing a state in which the piston 2 and the cleaning bar 3 have advanced to their limit positions. FIG.

The main terms shown in the embodiments correspond to each of the following elements of the automatic valve cleaning system according to the present application.

Lower trap 1...Basic automatic valve Piston 2 and cleaning bar 3...Cleaning means Upper trap 9...Auxiliary automatic valve Float 10...Opening/closing means Valve chamber 15 and valve seat space 62...Internal flow path Orifice 61...Valve port Drain pipe 72...Basic inflow path Branch drain pipe 74...Branch inflow path Upper discharge pipe 75 and cleaning connection pipe 76...Auxiliary discharge path Cleaning connection pipe 76...・Connection path Confirmation piping 77...Confirmation discharge path Clogged condition...Specified abnormal condition Drain...Target fluid

[First embodiment]
A first embodiment of an automatic valve cleaning system according to the present application will be described. In this embodiment, a cleaning system related to an air trap is taken as an example.

(Explanation of the overall system configuration)
First, the overall configuration of the cleaning system in this embodiment will be explained based on FIG. 1. In industrial plants and the like, compressed air (an example of compressed gas) is sometimes used as a power source, and air compressed by a compressor is supplied to the compressed air usage device 70 through a transfer pipe 71.

Drain (condensed water) is generated from the compressed air during transfer of the compressed air or when used in the compressed air usage device 70. This drain may cause uneven rotation of precision equipment, rust, etc., and may cause quality defects in products. For this reason, air traps are provided throughout the piping system and the like. The air trap has the function of automatically discharging generated condensate to the outside of the piping and preventing compressed air from flowing out.

A compressed air using device 70 shown in FIG. 1 is provided with a drain pipe 72, and a lower trap 1, which is an air trap, is connected to this drain pipe 72. Further, a discharge pipe 73 is connected to the lower trap 1. Condensate flows into the lower trap 1 through the drain pipe 72, and the lower trap 1 discharges this condensate into the discharge pipe 73. The cleaning system in this embodiment automatically performs cleaning when the lower trap 1 is clogged with foreign matter such as scale.

A branch drain pipe 74 is connected to the drain pipe 72, and the branch drain pipe 74 is provided with an upper trap 9 that is an air trap. In this embodiment, the upper trap 9 is arranged above the lower trap 1 in the vertical direction.

An upper discharge pipe 75 is connected to the upper trap 9, and this upper discharge pipe 75 branches into a cleaning connecting pipe 76 and a confirmation pipe 77. The cleaning connecting pipe 76 is connected to the lower trap 1. Note that the upper trap 9 is a general float type air trap, and has a function of discharging the drain to the upper discharge pipe 75 when drain flows in from the branch drain pipe 74.

(Explanation of the configuration of lower trap 1)
Next, the configuration of the lower trap 1 will be explained based on FIG. 2. The body 11 of the lower trap 1 is open toward the bottom, and a body lid 12 is fixed with bolts 13 to cover this opening, and an internal space is formed as a valve chamber 15. A gasket 37 is interposed between the body 11 and the body lid 12 to keep the valve chamber 15 airtight. An inlet 51 is formed in the body 11, to which a drain pipe 72 shown in FIG. 1 is connected. Further, an outlet port 55 is formed in the body 11 coaxially with the inlet port 51, and a discharge pipe 73 shown in FIG. 1 is connected to the outlet port 55.

A float 10, which is a hollow spherical body, is positioned in the valve chamber 15 so as to be freely floating. Furthermore, a mesh cover 45 is arranged above the valve chamber 15 and is fixed with bolts. This mesh cover 45 traps foreign matter flowing in from the inlet 51 along with air and drain.

A cylindrical recess is formed diagonally at the bottom of the body lid 12, and the valve seat 6 is attached to this recess. The valve seat 6 is fixed by being screwed into a recess in the body lid 12 with a gasket 39 in between.

An orifice 61 is formed at the tip of the valve seat 6 on the side of the valve chamber 15, and a cylindrical valve seat space 62 that opens rearward is further formed within the valve seat 6. The space on the rear end side of the valve seat 6 is configured as an intermediate chamber 19. The small-diameter orifice 61 communicates with a valve seat space 62, and the cylindrical diameter of the valve seat space 62 is formed larger than the inner diameter of the orifice 61.

The valve seat space 62 of the valve seat 6 communicates with an outlet passage 53 formed in the body lid 12 and an outlet passage 54 formed in the body 11 via an intermediate chamber 19, and the drain in the valve chamber 15 is connected to an orifice. 61 and is discharged from the outlet 55 to the discharge pipe 73 through these paths. Note that the float 10 is configured to close the orifice 61 when seated on the valve seat 6 and the support portion 49 provided on the body lid 12.

A cylinder 20 is integrally provided at the bottom of the body lid 12. Inside the cylinder 20, a cylindrical first cylinder chamber 21 and a second cylinder chamber 22 are formed. The central axes of the first cylinder chamber 21 and the second cylinder chamber 22 coincide with the central axis of the valve seat space 62 of the valve seat 6, and are arranged on the center line 40. The inner diameter of the second cylinder chamber 22 is slightly smaller than the inner diameter of the first cylinder chamber 21, and a stepped portion 23 is formed at the connection portion between the first cylinder chamber 21 and the second cylinder chamber 22.

Note that the intermediate chamber 19 and the second cylinder chamber 22 communicate with each other through a through hole provided along the center line 40. Further, the second cylinder chamber 22 and the outlet passage 53 communicate with each other through a bypass passage 88.

A piston 2 is provided within the first cylinder chamber 21 so as to be able to reciprocate in the directions of arrows 105 and 106. A cleaning bar 3 is fixed to this piston 2 so as to be positioned along a center line 40. The tip 3a of the cleaning bar 3 is disposed within the valve seat space 62 of the valve seat 6, and the diameter of the cross section of the tip 3a is slightly smaller than the inner diameter of the orifice 61.

A stopper 3b is integrally provided at the intermediate portion of the cleaning bar 3. This stopper 3b comes into contact with the bottom of the intermediate chamber 19, thereby restricting the piston 2 and the cleaning bar 3 from moving back in the direction of the arrow 105. FIG. 1 shows a state in which the stopper 3b of the cleaning bar 3 is in contact with the bottom of the intermediate chamber 19, and this is the limit position for the retraction of the piston 2 and the cleaning bar 3. Note that, under normal conditions, the piston 2 and the cleaning bar 3 are positioned in the state shown in FIG. 1 due to their own weight.

A penetrating side hole 25 is formed in the side surface of the first cylinder chamber 21 of the cylinder 20. A discharge connecting pipe 78 is connected to this side hole 25, and the discharge connecting pipe 78 is further connected to the discharge pipe 73. That is, the first cylinder chamber 21 of the cylinder 20 and the discharge pipe 73 communicate with each other through the discharge connection pipe 78. Note that the discharge connecting pipe 78 is provided with a check valve 35, and only one direction flow of drain from the first cylinder chamber 21 toward the discharge pipe 73 is permitted.

Further, the rear end of the first cylinder chamber 21 of the cylinder 20 is open, and the cleaning connecting pipe 76 shown in FIG. 1 is connected to this opening. The cleaning connecting pipe 76 is attached by screwing the cylinder cap 28 to the cylinder 20 via the gasket 38.

(Explanation of normal operation of lower trap 1)
Next, the normal operation of the lower trap 1 will be explained based on FIG. 2. Drain flows into the valve chamber 15 of the lower trap 1 from the inflow port 51 through the drain pipe 72 along the direction of the arrow 91. At this time, the float 10 is seated on the valve seat 6 and the support portion 49, and closes the orifice 61 of the valve seat 6. Drain 80 remains in the valve chamber 15, and the water level of the drain 80 is at level L1.

As the drain flows in from the inlet 51, the water level of the drain 80 in the valve chamber 15 gradually rises, and the float 10 also rises accordingly. Then, when the water level of the drain 80 reaches level L2, the floating float 10 completely opens the orifice 61 of the valve seat 6. By opening the orifice 61, the condensate accumulated in the valve chamber 15 follows the momentum of the high pressure in the piping and flows from the valve seat space 62 through the intermediate chamber 19, the outlet passages 53 and 54, and the outlet 55. It is discharged all at once into the discharge pipe 73 along the direction of arrow 92.

As the drain is discharged, the water level of the drain 80 remaining in the valve chamber 15 is lowered, and when it reaches the level L1, the float 10 descends again and seats, closing the orifice 61 of the valve seat 6. Thereafter, drain continues to flow in from the inlet 51, and when the water level of the drain 80 in the valve chamber 15 reaches level L2 again, the float 10 floats up to open the orifice 61 again and discharge the drain.

In this way, as the water level of the drain 80 in the valve chamber 15 increases or decreases, the float 10 repeatedly rises and falls, and the drain is frequently and continuously discharged from the lower trap 1. During this operation, the water level of the drain 80 remaining in the valve chamber 15 will fluctuate back and forth between levels L1 and L2, but the orifice 61 of the valve seat 6 will always be submerged in the drain 80. Therefore, the compressed air transferred through the piping system will not leak, and loss of compressed air can be avoided.

As mentioned above, since the upper trap 9 (FIG. 1) is arranged above the lower trap 1 in the vertical direction, drain does not flow into the upper trap 9 through the branch drain pipe 74 under normal conditions. .

(Explanation of cleaning operation when the lower trap 1 is clogged)
Foreign matter such as fine dust and scale may flow into the valve chamber 15 through the mesh of the mesh cover 45 (FIG. 2), and this foreign matter may adhere to the orifice 61. If such foreign matter accumulates over time, the diameter of the orifice 61 will gradually shrink, making drainage insufficient, and eventually the orifice 61 will be completely blocked, causing the float 10 to float. This also leads to a situation where no drain is discharged at all. Furthermore, if a relatively large foreign object adheres to the orifice 61, the drain may suddenly stop being discharged at all.

In the system according to this embodiment, such a clogged state of the orifice 61 of the lower trap 1 can be resolved by an automatic cleaning operation. First, since the orifice 61 is clogged, drain is no longer discharged from the lower trap 1, and the drain pipe 72 is filled with drain. Drain then flows from the drain pipe 72 into a branched drain pipe 74 shown in FIG. 1, and flows into the valve chamber of the upper trap 9.

As mentioned above, the upper trap 9 is a general float-type air trap (not shown), and upon receiving drain from the branch drain pipe 74, the float in the valve chamber floats to open the orifice. As a result, the drain is discharged from the valve chamber of the upper trap 9 to the upper discharge pipe 75, and the float descends and once closes the orifice. Then, the float floats due to the condensate that continues to flow into the valve chamber, and the upper trap 9 discharges the condensate. The upper trap 9 repeats and continuously performs such a discharge operation.

Drain discharged from the upper trap 9 to the upper discharge pipe 75 enters the cleaning connecting pipe 76, falls, and flows into the cylinder 20 of the lower trap 1 (FIG. 2). By repeating the discharge operation of the upper trap 9, the water head level of the drain in the cleaning connecting pipe 76 gradually rises.

Accordingly, the water head pressure of the drain in the cleaning connecting pipe 76 that is received by the piston 2 located in the cylinder 20 of the lower trap 1 also gradually increases. As shown in FIG. 3, due to this increase in water head pressure, the piston 2 and cleaning bar 3 begin to move forward in the direction of arrow 106 as one unit. FIG. 3 shows a state in which the piston 2 and the cleaning bar 3 are moving forward due to the head pressure of drain flowing in the direction of arrow 93.

As the piston 2 and the cleaning bar 3 move forward, the tip 3a of the cleaning bar 3 also moves forward toward the orifice 61 to which the foreign matter 30 is attached. Note that as the piston 2 moves forward, the drain that has accumulated on the second cylinder chamber 22 side is pushed out toward the outlet passage 53 through the bypass passage 88 in the direction of arrow 94. As mentioned above, the side hole 25 is formed in the side surface of the first cylinder chamber 21 of the cylinder 20, but at the stage shown in FIG. The drain that has flowed in will not leak out from the side hole 25.

FIG. 4 shows a state in which the piston 2 and the cleaning bar 3 have advanced to their limit positions. When the piston 2 comes into contact with the stepped portion 23 located at the connecting portion between the first cylinder chamber 21 and the second cylinder chamber 22, the forward movement of the piston 2 and the cleaning bar 3 in the direction of the arrow 106 is restricted, and the movement of the piston 2 and the cleaning bar 3 in the direction of the arrow 106 is restricted. Be in position. Note that the length of the cleaning bar 3 is set so that the tip 3a of the cleaning bar 3 enters the orifice 61 of the valve seat 6 when the forward movement of the piston 2 and the cleaning bar 3 reaches the limit position. .

When the tip 3a of the cleaning bar 3 enters the orifice 61, the foreign matter 30 attached to the orifice 61 is destroyed, peeled off, and pushed out to the valve chamber 15 side. As a result, a gap is created between the tip portion 3a and the orifice 61, and the drain gradually flows into the valve seat space 62 through this gap. The inflowing drain then advances from the valve seat space 62 to the outlet passage 53 along the direction of arrow 95.

At this time, since the valve chamber 15 and the drain pipe 72 are filled with drain, the float 10 remains floating, and the drain continues to be discharged from the gap between the tip portion 3a and the orifice 61. Note that the drain that has entered the outlet passage 53 also flows in the direction of arrow 96 toward the second cylinder chamber 22 through the bypass passage 88.

Further, as the piston 2 moves forward to the limit position shown in FIG. 4, the side hole 25 of the cylinder 21 is opened, and the drain in the first cylinder chamber 21 is discharged from the discharge connecting pipe 78 along the direction of the arrow 97. . Then, as condensate begins to flow out from the gap between the tip 3a of the cleaning bar 3 and the orifice 61, the flow rate from the drain pipe 72 to the branch drain pipe 74 decreases (see FIG. 1), causing it to flow into the upper trap 9. drain will no longer flow in. Accordingly, the discharge of condensate from the upper trap 9 to the upper discharge pipe 75 is stopped, and the head pressure applied to the piston 2 gradually decreases.

In this way, as the water pressure of the drain on the second cylinder chamber 22 side with respect to the piston 2 increases and the water pressure of the drain on the first cylinder chamber 21 side with respect to the piston 2 decreases, the piston 2 and the cleaning bar 3 gradually move in the direction of the arrow 105. Start retreating to. Then, when the tip 3a of the cleaning bar 3 completely retreats from the orifice 61 of the valve seat 6, the drain in the valve chamber 15 is immediately discharged from the lower trap 1, and the clogging state is completely eliminated.

Further, the drain flowing into the outlet passage 53 generates high water pressure in the direction of arrow 96 through the bypass passage 88, and the piston 2 and cleaning bar 3 are pushed back to the state shown in FIG. 2 and returned to their positions. After this, the lower trap 1 resumes the normal operation described above. The foreign matter 30 pushed out from the orifice 61 toward the valve chamber 15 by the entry of the tip 3a of the cleaning bar 3 is discharged from the steam trap 1 together with the drain.

(Explanation of processing when the clogged condition of lower trap 1 is not cleared)
If the foreign matter 30 adheres to the orifice 61 and a clogging condition occurs, the tip 3a of the cleaning bar 3 automatically enters the orifice 61 of the valve seat 6 to remove the foreign matter 30, as described above. However, depending on the state of adhesion of the foreign matter 30, even if the tip 3a of the cleaning bar 3 enters the orifice 61, the foreign matter 30 may not be removed and the clogging state may not be resolved. In such a case, in this embodiment, the operator can visually observe the drain flowing out from the confirmation piping 77 and recognize that the clogged state has not been resolved.

In other words, if the foreign object 30 is not removed even if the tip 3a of the cleaning bar 3 enters the orifice 61, the piston 2 and the cleaning bar 3 will remain at the forward limit position shown in FIG. It continues to receive the water head pressure of the drain in the connecting pipe 76 and stops moving. In this case, the drain continues to be discharged from the upper trap 9 to the upper discharge pipe 75, and the water head level of the drain in the cleaning connection pipe 76 rises and enters the confirmation pipe 77.

Note that when the piston 2 and cleaning bar 3 reach their limit positions, the side hole 25 of the cylinder 21 is opened as shown in FIG. 4, and the drain is discharged from there to the discharge connection pipe 78 (FIG. 2). , the amount of drain flowing in from the cleaning connecting pipe 76 is greater than the amount discharged from the side hole 25. Therefore, the water head level of the drain in the cleaning connecting pipe 76 and the checking pipe 77 increases with the passage of time, and eventually the drain flows out from the checking pipe 77 to the outside.

The outflow of condensate from this confirmation pipe 77 is visually confirmed by the worker, who recognizes that the orifice 61 is still clogged and performs maintenance work such as disassembling and cleaning the lower trap 1. . Therefore, maintenance work on the lower trap 1 can be performed by the operator at an appropriate timing.

[Other embodiments]
In the embodiment described above, an example was shown in which the automatic valve cleaning system according to the present application was applied to an air trap, but it can also be applied to other automatic valves. For example, the automatic valve cleaning system according to the present application may be applied to a steam trap provided in a steam transfer pipe.

In addition, in the above embodiment, the piston 2 and the cleaning bar 3 are illustrated as cleaning means, but the auxiliary automatic valve (upper trap 9, etc.) is connected to the auxiliary discharge path (upper discharge pipe 75, cleaning connection pipe 76, etc.). As long as the configuration is such that the target fluid (drain, etc.) discharged toward the valve is taken in and enters the valve port (orifice 61, etc.) based on the target fluid, configurations with other structures and functions can also be adopted. .

Furthermore, in the above-described embodiment, an example was shown in which the upper trap 9 (auxiliary automatic valve) is arranged above the lower trap 1 (basic automatic valve) in the vertical direction; The relationship is not limited to this, as long as there is a positional relationship between upstream and downstream in the flow direction of the target fluid such as drain. For example, even if the target fluid (drain etc.) discharged from the auxiliary automatic valve flows into the basic automatic valve based on the force of high pressure, etc., the position where the auxiliary automatic valve is placed above the basic automatic valve Applies to relationships.

1: Lower trap 2: Piston 3: Cleaning bar 9: Upper trap
10: Float 15: Valve chamber 61: Orifice 62: Valve seat space 72: Drain pipe
74: Branch drain pipe 75: Upper discharge pipe 76: Connection pipe for cleaning
77: Confirmation piping

Claims (2)

A basic automatic valve that receives the inflow of target fluid from the basic inflow path and automatically discharges the target fluid toward the basic discharge path;
An auxiliary automatic valve placed above the basic automatic valve, which allows target fluid to flow in from a branch inflow path connected to the basic inflow path when a predetermined abnormal condition occurs in the basic automatic valve. an auxiliary automatic valve that automatically discharges the target fluid to an auxiliary discharge path in response to the
An automatic valve cleaning system comprising:
The basic automatic valve is
an internal flow path provided inside and through which the target fluid flows;
a valve port that is provided on the internal flow path and allows the target fluid to pass;
Opening/closing means that automatically opens the valve port based on the inflow of the target fluid from the basic inflow path;
a cylinder chamber communicating with the internal flow path and the auxiliary discharge path;
A cleaning means disposed in a cylinder chamber so as to be movable into or out of a valve port , and having a tip end capable of entering into a piston and a valve port , wherein the auxiliary automatic valve is directed toward an auxiliary discharge path. cleaning means for causing the tip end to enter the valve port based on the target fluid by the piston receiving the fluid pressure of the target fluid discharged by the piston;
a connecting passage connecting the cylinder chamber and the basic discharge passage;
It is equipped with
When the tip of the cleaning means does not enter the valve port, the piston in the cylinder chamber blocks communication between the basic discharge passage and the auxiliary discharge passage via the connection passage, and the tip of the cleaning means does not enter the valve opening. opening the communication between the basic discharge passage and the auxiliary discharge passage via the connecting passage by movement of the piston part within the cylinder chamber;
An automatic valve cleaning system characterized by: The automatic valve cleaning system according to claim 1,
The auxiliary discharge path branches into a connection path that supplies the target fluid to the basic automatic valve, and a confirmation discharge path.
An automatic valve cleaning system characterized by:

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