JPH0730874B2 - Reverse bucket type drain trap - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reverse bucket type drain trap, and more specifically, it is used in a system using gas such as a high pressure air supply system and a steam supply system, and a liquid generated in these systems. That is, it relates to one that discharges drain.

[0002]

2. Description of the Related Art FIG. 9 is a view showing a conventional lever type reverse bucket type drain trap.
It is shown in the publication. Bottomed cylindrical body 10
A cover 102 is placed on the upper part of 1, and the body main body 101 and the cover 102 are integrally fixed by a bolt 103. As a result, the bucket chamber 104 is formed inside the body 101 and the cover 102. A fluid inlet 105 is formed substantially in the center of the bottom of the bucket chamber 104. The body body 101 is provided with a fluid introduction port 106 into which a drain and a gas introduced from the outside flow, and a pipe line 107 communicating with the fluid introduction port 106 and the fluid inflow port 105. A valve seat 110 is screwed in the vicinity of the upper peripheral edge of the bucket chamber 104. A liquid discharge port 108 is formed in the valve seat 110. The valve seat 110 fixes the bracket 109 to the cover 102. The body body 101 is formed with an outlet 111 for discharging the drain to the outside. In addition, the body 101 and the cover 102
A pipe line 112 communicating with the outlet 111 and the liquid discharge port 108 is formed in.

A reverse bucket 113 having a downward opening is housed in the bucket chamber 104. A vent hole 114 is formed on the upper peripheral edge of the reverse bucket 113. Vent hole 1
A locking prevention rod 115 for preventing clogging of a hole is slidably and rotatably fitted into the shaft 14. An eyebolt 116 is screwed on the upper portion of the reverse bucket 113 substantially in the center thereof. Between the eyebolt 116 and the bracket 109, there is a lever 11 which is rotatable around pins 117 and 118.
9 is suspended. In the vicinity of the pin 118 of the lever 119,
A drain valve 120 that can be seated on the valve seat 110 is fixed.
A set bolt 121 for fixing a bimetal (not shown) and a bracket 109 is screwed to the cover 102 on the upper portion of the bucket chamber 104.

FIG. 10 is a view showing an operating state of the lever type reverse bucket type drain trap shown in FIG. First,
Drain α remaining in the system from the fluid inlet 106
Only inflow (see FIG. 10 (1)). At this time, the gas β stored in the reverse bucket 113 is exhausted to the bucket chamber 104 via the vent hole 114 in response to the drain α flowing into the reverse bucket 113. Therefore, the reverse bucket 113 does not float up due to buoyancy. Therefore, the liquid outlet 108 is kept open. The gas β stored in the bucket chamber 104 is discharged from the liquid outlet 108 as the drain α flows into the bucket chamber 104 from the fluid inlet 105 because the liquid outlet 108 is open. Further, when the exhaust of the gas β in the bucket chamber 104 is finished, the liquid drain port 108 remains open, so that the residual drain α starts to be discharged to the outside (see FIG. 10 (2)).

Next, when the drain α remaining in the system disappears, gas β such as high-pressure dry air and steam required in the system is passed through the fluid inlet 106 and the fluid inlet 105 following the drain α. And enters the reverse bucket 113 (see FIG. 10 (3)). When the gas β enters the reverse bucket 113, buoyancy is applied to the reverse bucket 113 and the reverse bucket 113 floats upward. When the reverse bucket 113 floats, the drain valve 120 sits on the valve seat 110 and closes the liquid outlet 108. As a result, drainage α is stopped. At this time, the gas β in the reverse bucket 113 is discharged to the upper part of the bucket chamber 104 through the vent hole 114, but the gas β discharged from the vent hole 114 is supplied from the fluid inlet 105. Since β is larger, it keeps floating due to buoyancy, and keeps the liquid discharge port 108 closed.

Next, the gas β followed by the drain α is passed through the fluid inlet 106 and the fluid inlet 105 to form the bucket chamber 104.
Flow into the reverse bucket 113, the supply of the gas β to the reverse bucket 113 is stopped, and all the gas β in the reverse bucket 113 is vented.
The drain α is discharged to the upper part of the bucket chamber 104 via 4 and the drain α is filled in the reverse bucket 113. As a result, the reverse bucket 113 loses buoyancy and descends under its own weight (FIG. 10).
(See (4)). Therefore, the liquid outlet 108 is opened.
As a result, the drain α in the bucket chamber 104 is discharged through the liquid discharge port 108. Then, the states of FIG. 10 (3) and FIG. 10 (4) are repeated to discharge the drain α intermittently. In addition, actual public Sho 63-1
The same operation is performed in the conventional UFO reverse bucket type drain trap disclosed in Japanese Patent No. 5676.

[0007]

However, the conventional reverse bucket type drain trap has the following problems. First of all, in order to move the reverse bucket up and down, it is necessary to receive supply of gas β necessary for the system. However, when drain α is discharged, gas β in the reverse bucket and gas β in the upper part of the bucket chamber are It is discharged together with the drain α. Therefore, it is necessary to newly receive the supply of the gas β from the system each time the reverse bucket is moved up and down.
The newly supplied gas β is intermittently discharged to the outside through the reverse bucket type drain trap. Therefore, conventionally, there is a problem that the efficiency of the system is significantly reduced because the gas β necessary for the system is wastefully exhausted.

Secondly, if the diameter of the vent hole is large, the gas in the reverse bucket is exhausted in a short time, so that the reverse bucket loses its buoyancy in a short time, and the closing time of the liquid discharge port is shortened. . On the other hand, if the diameter of the vent hole is small, it takes time for the gas in the reverse bucket to be exhausted, so it takes time for the reverse bucket to lose its buoyancy, and the time for closing the liquid discharge port becomes short. Therefore, conventionally, the diameter of the vent hole is changed according to the discharge amount of the drain α per unit time (that is, the capacity of the drain trap). For this reason, conventionally, it is necessary to change the diameter of the vent hole for each system for individual production, resulting in poor productivity and high cost. Moreover, since the capacity of the conventional reverse bucket drain trap is almost regulated by the diameter of the vent hole, the operating range is narrow, and it is possible to cope with this if the drain discharge amount on the system side fluctuates for some reason. There was a problem that it was difficult.

The present invention solves the above technical problems, prevents wasteful discharge of gas, improves the efficiency of the system, is suitable for mass production, and is a reverse bucket type which has a wide adaptable range for increasing and decreasing the drain amount. The purpose is to provide a drain trap.

[0010]

In order to solve the above technical problems, the present invention has the following configurations. The reverse bucket type drain trap according to claim 1 temporarily stores fluid and gas flowing from the outside and discharges only the liquid to the outside automatically and intermittently, and has a fluid introduction port at an upper portion thereof. A fluid storage chamber that temporarily stores the fluid and gas introduced from the fluid introduction port, a fluid inlet port that communicates with the fluid storage chamber at its lower portion, and a liquid discharge port that communicates with the outside at its upper portion, A bucket chamber having a gas discharge port communicating with the fluid storage chamber at its upper portion, a reverse bucket having a vent hole at its upper portion and vertically movable in the bucket chamber, and vertically movable in the fluid reservoir chamber, Liquid level detection means for detecting whether or not the liquid level in the liquid storage chamber is at least a predetermined height exceeding the liquid discharge port by its buoyancy force, and in conjunction with the vertical movement of the liquid level detection means, the liquid level in the liquid storage chamber Is below a predetermined height, the gas outlet and vent holes are closed to prohibit the removal of the gas stored in the reverse bucket, and the bucket chamber is steadily filled with almost all the water, so that the liquid level in the liquid storage chamber Is above a certain height, it has a valve mechanism that opens the gas outlet and vent holes to exhaust the gas in the reverse bucket to the fluid storage chamber via the bucket chamber, and closes the liquid outlet when the reverse bucket rises. The liquid discharge port is opened when the reverse bucket descends, whereby the liquid is discharged from the liquid discharge port.

A reverse bucket type drain trap according to a second aspect is the one according to the first aspect, further comprising a backflow prevention valve mechanism for preventing the liquid in the bucket chamber from flowing back to the fluid storage chamber via the fluid inlet. Is characterized by.

A reverse bucket type drain trap according to a third aspect is the drain trap according to the first or second aspect, wherein
The vent hole when the bucket is lifted up is characterized by being arranged substantially vertically in the vertical direction.

A reverse bucket type drain trap according to a fourth aspect is the reverse trap type drain trap according to the first, second or third aspect, wherein the gas discharge port is disposed above the liquid discharge port.

A reverse bucket type drain trap according to a fifth aspect is the reverse trap type drain trap according to the first, second, third or fourth aspect, wherein the fluid storage chamber includes all or part of the bucket chamber including the gas outlet and the fluid inlet. It is characterized in that it is formed by surrounding.

[0015]

In the reverse bucket type drain trap of the first aspect, the liquid level detecting means detects whether or not the liquid level in the fluid storage chamber is at least a predetermined height exceeding the gas discharge port by its buoyancy. The valve mechanism is interlocked with the vertical movement of the liquid level detection means, and when the liquid level in the liquid storage chamber is higher than or equal to a predetermined height, the gas outlet and the vent hole are opened and the gas in the reverse bucket is passed through the bucket chamber. Exhaust to the fluid storage chamber. The reverse bucket loses buoyancy and descends. When the reverse bucket is lowered, the liquid outlet is opened, whereby the liquid is discharged from the liquid outlet. Thereby, the gas is collected in the fluid storage chamber without being discharged from the liquid discharge port. Further, the valve mechanism closes the gas discharge port and the vent hole when the liquid level in the liquid storage chamber becomes equal to or lower than a predetermined height. When the liquid level in the fluid storage chamber drops to the fluid inlet, the gas is stored in the reverse bucket via the fluid inlet. Since the vent hole is closed, the exclusion of the gas stored in the reverse bucket is prohibited, and the bucket chamber is constantly filled with water. The reverse bucket gains buoyancy and rises. The liquid outlet is closed when the reverse bucket is raised. As a result, if even a small amount of liquid flows into the fluid storage chamber, the liquid level in the fluid storage chamber rises from the fluid inlet and exceeds the gas outlet. As a result, the liquid level detecting means floats.

In the reverse bucket type drain trap of the second aspect, the backflow prevention valve mechanism prevents the liquid in the bucket chamber from flowing back to the fluid storage chamber via the fluid inlet. As a result, even if the gas outlet is left open for some reason when the liquid level in the liquid storage chamber becomes lower than or equal to a predetermined height, the bucket chamber is constantly filled with water.

In the reverse bucket type drain trap of the third aspect, the gas discharge port and the vent hole when the bucket is most raised are arranged substantially vertically above and below. As a result, the gas exiting the vent hole rises vertically upward and heads toward the gas outlet.

In the reverse bucket type drain trap of the fourth aspect , the gas discharge port is arranged above the liquid discharge port. As a result, even if the gas exiting the vent hole shifts upward from the vertical direction for some reason, the gas eventually reaches the gas discharge port.

In the reverse bucket type drain trap of the fifth aspect, the fluid storage chamber is formed by surrounding all or part of the bucket chamber including the gas discharge port and the fluid inflow port. As a result, the size can be reduced as compared with the case where the fluid storage chamber and the bucket chamber are provided separately.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a lever type reverse bucket type drain trap according to an embodiment of the present invention. The cover 2 is placed on the upper portion of the bottomed cylindrical body body 1, and the body body 1 and the cover 2 are integrally fixed by the bolts 3.
As a result, the fluid storage chamber 4 is formed inside the body 1 and the cover 2. A fluid inlet 5 and an external outlet 6 into which drain and gas from a system (not shown) flow in are formed in the upper part of the fluid storage chamber 4. Inside the fluid storage chamber 4, a bottomed cylindrical inner body body 7 and an inner cover 8 are housed. The inner body 7 and the inner cover 8 are integrally fixed by a bolt 9. As a result, the bucket chamber 10 is formed inside the inner body 7 and the inner cover 8.

A fluid inlet 11 communicating with the fluid storage chamber 4 is formed substantially in the center of the bottom of the bucket chamber 10. A valve seat 15 is screwed to the upper part of the bucket chamber 10 near one peripheral edge. The liquid outlet 12 is formed in the valve seat 15.
The valve seat 27 is provided near the other edge of the upper portion of the bucket chamber 10.
Is screwed on. The valve seat 27 is provided with a gas discharge port 13 which is disposed above the liquid discharge port 12 and communicates with the fluid storage chamber 4. The valve seat 15 fixes the bracket 14 to the inner cover 8. A connecting pipe 16 is arranged between the liquid outlet 12 and the external outlet 6.

A reverse bucket 17 having a downward opening is housed in the bucket chamber 10. A vent hole 18 is formed in the upper peripheral edge of the reverse bucket 17. The gas outlet 1
3 and the vent hole 18 when the reverse bucket 17 is fully raised.
And are arranged vertically above and below. A guide 19 is formed below the vent hole 18. Reverse bucket 1
An eyebolt 20 is screwed into the upper portion of the upper portion of the upper portion 7 substantially at the center.
Pin 2 is placed between the eyebolt 20 and the bracket 14.
A lever 23 that is rotatable around 1, 22 is pivotally mounted. A drain valve 24 that can be seated on the valve seat 15 is fixed near the pin 22 of the lever 23. A set bolt 25 for fixing a bimetal (not shown) and the bracket 14 is screwed to the inner cover 8 on the upper portion of the bucket chamber 10.

A reverse bucket type float 26 as a liquid level detecting means is housed in the fluid storage chamber 4. Float 2
6 and the valve 29 that can be seated on the valve seat 27 are fixed via a valve rod 30. An O-ring 28 is fitted on the valve seat 27. A guide 31 is fixed to the lower portion of the valve 29. This prevents the valve 29 from falling off and becoming unable to sit on the valve seat 27.

The upper end of the chain 34 is locked to the lower end of the guide 31. The lower end of the chain 34 is locked to the upper end of the nail-shaped vent rod 32. The vent rod 32 is
It is loosely fitted in the vent hole 18. An O-ring 33 having a diameter sufficient to close the vent hole 18 is fitted just below the head of the vent rod 32. The diameter of the vent hole 18 and the diameter of the vent rod 32 are determined according to the maximum drain discharge capacity. Here, the reason why the vent rod 32 is formed long is to obtain a sufficient self-weight and prevent the vent rod 32 from falling off from the vent hole 18. Further, the vent rod 32 has the vent hole 1
By sliding 8 the dust and oil contained in the drain can be prevented from adhering to the vent hole 18.

Here, the reverse bucket 17 has pins 21, 2
It moves up and down in an arc shape with 2 as a rotation axis. Therefore, the vent hole 18 also moves up and down in an arc shape. On the other hand, the valve 29 is
Moves vertically up and down. Therefore, when the guide 31 and the vent rod 32 are connected by a rod when the movement directions are different, it is difficult to center the core. When the chains 34 are connected, it is possible to deal with them by freely deforming even when the movement directions are different. Moreover, by using the chain 34, it is possible to provide a play between the opening and closing of the gas outlet 13 and the opening and closing of the vent hole 18. In addition, the valve seat 27, the O-ring 28, the valve 29, the valve rod 30, the guide 31, the vent rod 32, the O-ring 33, and the chain 3.
4 functions as a valve mechanism.

A check valve 35 as a check valve mechanism is provided in association with the fluid inlet 11. The check valve 35 includes a valve seat 36 fixed to the bottom of the inner body 7 and a valve seat 3
Ball-shaped float 37 that can be seated on 6 and float 3
7 and a lid 38 for preventing the float from escaping.

2 to 7 are diagrams showing the operating state of the lever type reverse bucket type drain trap shown in FIG. Here, in the initial ventilation operation when the operation of the drain trap is started, the drain is not discharged from the system, and the drain remains in the system. Therefore, only the residual drain remains from the fluid introducing port 5. Inflow. When the drain remaining in the system is discharged, the venting initial operation ends, and the normal operation of the drain trap is performed.
In this normal operation, for convenience, the operation will be described assuming that gas and drain alternately flow from the fluid inlet 5.

FIG. 2 is a view showing a state where the drain has started to flow in during the initial ventilation operation. First, the fluid inlet 5
Only the drain α remaining from the inflows. The drain α that has flowed into the fluid storage chamber 4 travels along the side wall and is stored in the fluid storage chamber 4
Of the bucket chamber 10 and the reverse bucket 17 via the fluid inlet 11 and the check valve 35.
Flows in. At this time, the atmospheric pressure gas β stored in the reverse bucket 17 has a pressure (for example, 10
Since the air pressure) is high, the air is compressed and is discharged to the bucket chamber 10 having a low air pressure through the vent hole 18 as the drain α flows into the reverse bucket 17. For this reason,
The reverse bucket 17 does not float due to buoyancy. Therefore, the liquid outlet 12 is kept open. The gas β stored in the bucket chamber 10 is the liquid outlet 1
Since 2 is open, the drain α is almost exhausted from the liquid outlet 12 as the drain α flows into the bucket chamber 10 from the fluid inlet 11. The gas β that has not been exhausted is compressed to 10 atm and remains in the bucket chamber 10 near the gas discharge port 13.

FIG. 3 is a diagram showing a state in which the drain that has flowed in is discharged during the initial operation of ventilation. When the exhaust of the gas β in the bucket chamber 10 is almost completed, the reverse bucket 1
Since the liquid 7 is lowered and the liquid discharge port 12 is still open, discharge of the residual drain α is started. On the other hand, when the level of the drain α in the fluid storage chamber 4 exceeds the level of the gas discharge port 13, the compressed gas β remains in the float 26, so the float 26 floats by buoyancy and moves upward, Open the gas outlet 13. As a result, the gas β trapped near the gas outlet 13 flows into the float 26. When the float 26 floats and moves upward due to buoyancy and the gas outlet 13 is opened, the vent rod 32 is pulled upward by the chain 34, and the vent hole 1
8 is opened. However, since the reverse bucket 17 is still lowered and the liquid discharge port 12 is still open, the drain α that has flowed in from the fluid inlet port 5 is stored in the fluid storage chamber 4, the fluid inlet port 11, the check valve 35, and the bucket. It is sequentially discharged from the liquid discharge port 12 through the chamber 10. The drain α is continuously discharged until the drain α remaining in the system disappears. This completes the initial ventilation operation.

FIG. 4 is a diagram showing the initial state of gas inflow following the drain during normal operation. When the drain α remaining in the system disappears, gas β such as high-pressure dry air and steam required in the system enters the fluid storage chamber 4 via the fluid inlet 5 following the drain α. The gas β enters the upper part of the fluid storage chamber 4, and the level of the drain α below the gas β decreases as the gas β flows in. At this time, first, before the level of the drain α reaches the level of the gas outlet 13, the float 26 descends as the level of the drain α decreases, and the buoyancy of the float 26 disappears.
Therefore, the valve 29 is seated on the valve seat 27, and the gas outlet 13 is first closed. As a result, the gas outlet 13
Therefore, the gas α is prevented from flowing into the bucket chamber 10 and the inside of the bucket chamber 10 is kept full. When the float 26 loses its buoyancy and the valve 29 is seated on the valve seat 27, the vent rod 32 descends and the vent hole 18 is closed.

FIG. 5 is a diagram showing a state in which the gas has flowed into the vicinity of the fluid inlet 11 during the normal operation. When the level of the drain α in the fluid storage chamber 4 further decreases and the gas β reaches the fluid inlet 11, the gas β is drained by the drain α.
At the same time, it enters the reverse bucket 17 via the fluid inlet 11 and the check valve 35. When the gas β enters the reverse bucket 17, the level of the drain α in the reverse bucket 17 decreases due to the gas β, and the reverse bucket 17 has a buoyancy force.
7 floats up. When the reverse bucket 17 floats up, the drain valve 24 is seated on the valve seat 15 and the liquid outlet 12
Close. As a result, drainage α is stopped. At this time, the pressure of the gas β in the reverse bucket 17 is the same as the pressure of the drain α, and the vent hole 18 becomes the vent rod 32.
The gas β in the reverse bucket 17 is not discharged to the bucket chamber 10 through the vent hole 18 because it is closed by. Therefore, the reverse bucket 17 continues to maintain the buoyancy and keeps the liquid discharge port 12 closed. When the discharge of the drain α is stopped, the drain α flows into the fluid storage chamber 4 from the fluid introduction port 5, and the level of the drain α in the fluid storage chamber 4 rises.

FIG. 6 is a diagram showing a state in which the level of the drain α has risen to the upper part of the fluid storage chamber 4 due to the inflow of the drain during normal operation. When the drain α follows the gas β into the fluid storage chamber 4 via the fluid inlet 5, the level of the drain α in the fluid storage chamber 4 rises. When the level of drain α in the fluid storage chamber 4 further rises and the level of drain α in the fluid storage chamber 4 exceeds the level of the gas discharge port 13, the float 26 floats by buoyancy and opens the gas discharge port 13. When the float 26 floats by buoyancy and opens the gas discharge port 13, the vent rod 32 is pulled by the chain 34 and ascends to open the vent hole 18. When the vent hole 18 is opened,
The gas β trapped in the reverse bucket 17 flows out from the vent hole 18 into the bucket chamber 10, and the level of the drain α in the reverse bucket 17 rises. The gas β flowing out into the bucket chamber 10 rises in the bucket chamber 10 substantially vertically upward to the gas discharge port 13 and flows into the float 26 via the gas discharge port 13. Further, since the gas discharge port 13 is located above the liquid discharge port 12, the gas β that has flowed into the bucket chamber 10 will eventually reach the upper gas discharge port 13 even if it is deviated from the vertical direction.
Head towards.

FIG. 7 is a diagram showing a state in which the drain that has flowed in is discharged during normal operation. Vent hole 18
Opens, the gas β in the reverse bucket 17 flows out, and when the drain α is filled, the reverse bucket 17 loses buoyancy,
It descends under its own weight. It takes some time for the reverse bucket 17 to descend due to friction with the drain α. For this reason,
It takes time to open the liquid outlet 12. On the other hand, the gas β flowing out from the vent hole 18 of the reverse bucket 17 vigorously rises vertically upward. As a result, when all the gas α is exhausted to the fluid storage chamber 4 through the gas outlet 13, the liquid outlet 12 is still closed, and then the liquid outlet 12 starts to open. Therefore, the gas β is never discharged from the liquid discharge port 12. When the reverse bucket 17 descends, the liquid outlet 12 opens. As a result, only the drain α in the bucket chamber 10 is discharged through the liquid discharge port 12.

Thereafter, the operations shown in FIGS. 4 to 7 are sequentially repeated to collect the gas β and to drain the drain α.
Only the gas is discharged intermittently. By the way, if the amount of drain α discharged from the system fluctuates, the vent hole 1
The diameter of the drain 8 is not changed, and the discharge of the drain α is performed by the intermittent cycle. That is, conventionally, the vent hole was already opened in the state shown in FIG. 5, but in this embodiment, the vent hole 18 is closed so that the gas in the reverse bucket 17 is not discharged to the bucket chamber 10. Therefore, if even a small amount of drain α flows from the system into the fluid storage chamber 4 via the fluid inlet 5, the level of the drain α in the fluid storage chamber 4 rises from the fluid inlet 11, and the gas outlet 13 The float 26 floats over. As a result, the operation is sequentially performed in the order of FIG. 6, FIG. 7, and FIG. Therefore, even if the drain α has a small capacity, it can be operated normally. On the other hand, conventionally, the vent hole was already opened in the state of FIG. 5, but in this embodiment, the vent hole 18 is opened for the first time in the state of FIG. Therefore, if the diameter of the vent hole 18 is increased from the beginning, the gas β in the reverse bucket 17 can be quickly exhausted even if the inflow amount of the drain from the system is large. Therefore, the reverse bucket 17 loses buoyancy in a short time and the liquid discharge port 12 can be opened quickly, so that the drain α can operate normally even if the drain α has a large capacity. This makes it possible to handle a wide range of the flow rate of the drain α. Further, regardless of the discharge amount of the drain of the system, the diameter of the vent hole 18 may be increased from the beginning, so that mass production can be achieved and the cost can be reduced.

In the state shown in FIG. 5, the bucket chamber 1
0 is filled with the drain α, and the level of the drain α in the fluid storage chamber 4 is at the fluid inlet 11. Therefore, the drain α of the bucket chamber 10 is unexpectedly charged by some reason, for example, the weight of the drain α of the bucket chamber 10 causes the valve 29 and the valve. There is a possibility that the seal of the seat 27 may be broken and the gas outlet 13 may be opened, which may cause an unexpected accident. However, since the check valve 35 is provided, the check valve 35 prevents the drain α in the bucket chamber 10 from flowing back to the fluid storage chamber 4. Therefore, the gas α is prevented from flowing into the bucket chamber 10 from the gas outlet 13, and the bucket chamber 10 can be filled with the drain α. Therefore, it is possible to operate normally even in the unexpected case. Further, by providing the check valve 35, it is not necessary to tightly seal the valve 29 and the valve seat 27. In addition, the drain α of the bucket chamber 10
Flows back into the fluid storage chamber 4 through the fluid inlet 11 by its own weight, and the gas β is as much as the drain α that has flowed back.
There is also a risk of flowing into the reverse bucket 17 via the. However, since the check valve 35 is provided, the check valve 35
The drain α fluid storage chamber 4 in the bucket chamber 10
Backflow is blocked. Therefore, since the drain α does not flow backward, the gas α flows from the gas outlet 13 to the bucket chamber 10.
The gas α also flows into the bucket chamber 10 and the gas α overflowing from the bucket chamber 10 becomes
It is also prevented from flowing out to 0, and the inside of the bucket chamber 10 can be filled with the drain α.

Here, it is assumed that the check valve 35 is not provided. The check valve 35 closes the fluid inlet 11 in the state of FIG. However, at this time, the liquid outlet 12, the gas outlet 13, and the vent hole 18 are closed. Therefore, in the case where the check valve 35 is not provided and the unexpected itself does not occur,
The drain α in the reverse bucket 17 and the drain α in the bucket chamber 10 flow back into the fluid storage chamber 4 via the fluid inlet 11, and the gas α in the fluid storage chamber 4 enters the bucket chamber 10 via the fluid inlet 11. Trying to flow in. However, when the backflow of the drain α and the inflow of the gas β slightly occur, the level of the drain α in the fluid storage chamber 4 rises from the fluid inlet 11, and the inflow of the gas α stops, so that the backflow of the drain α occurs. Stop. Further, since the amount of the gas α that has flowed in is small, the gas α that has flowed in only enters the reverse bucket 17, and even if it overflows from the reverse bucket 17, the overflowing gas α
Is small and only slightly accumulates in the vicinity of the gas discharge port 13, so that the inside of the bucket chamber 10 can be almost filled with the drain α. Therefore, even if the check valve 35 is not provided, the inside of the bucket chamber 10 is always kept filled with the drain α, the vent hole 18 is closed, and the bucket chamber 10 loses buoyancy. Since there is no, it can be operated normally.

FIG. 8 is a diagram showing the construction of a UFO type reverse bucket type drain trap according to another embodiment of the present invention, and the portions corresponding to those of the embodiment of FIG. 1 are designated by the same reference numerals. It should be noted in this embodiment that the reverse bucket 17 itself is the drain valve 2.
4, the liquid discharge port 12 is opened and closed depending on whether the outer peripheral surface of the reverse bucket 17 is brought into contact with the valve seat 15 instead of being seated on the valve seat 15 by the drainage valve 24. That is. Even in this case, the same operation as in the embodiment of FIG. 1 can be performed. Also, in this example,
Instead of surrounding the entire bucket chamber 10, the bucket chamber 10 is partially surrounded by the fluid storage chamber 4 and the pipeline 4 a forming a part of the fluid storage chamber 4.

In the above embodiment, the inverted bucket type float 26 is used as the liquid level detecting means, but as another embodiment of the present invention, a spherical float or the like may be used. You may make it implement | achieve the structure similar to the check valve 35 as a part of surface detection means and a valve mechanism. Alternatively, a metal plate or the like may be used as the check valve mechanism. Further, although the fluid storage chamber is configured to be entirely or partially surrounded by the bucket chamber including the gas discharge port and the fluid inlet port, the fluid storage chamber and the bucket chamber may be separately provided. . However, since the size of the fluid storage chamber increases when provided separately, it is possible to reduce the size of the fluid storage chamber by surrounding the bucket chamber including the gas discharge port and the fluid inlet port in whole or in part.

[0039]

As described above, according to the first aspect of the present invention, when the liquid level detecting means detects the liquid level in the fluid storage chamber is higher than a predetermined height exceeding the gas discharge port, the valve mechanism discharges the gas. Since the gas in the reverse bucket is exhausted to the fluid storage chamber via the bucket chamber by opening the outlet and the vent hole, the gas is not discharged to the outside from the liquid discharge port, and it is not necessary to newly replenish the gas from the system. Therefore, the efficiency of the system can be improved. Further, when the liquid level detection means detects that the liquid level in the fluid storage chamber is below a predetermined height above the gas discharge port, the valve mechanism closes the gas discharge port and the vent hole and is stored in the reverse bucket. Since the exclusion of gas is prohibited, the bucket chamber is constantly filled with almost full water, and the liquid discharge port is closed when the reverse bucket rises, so if even a small amount of liquid flows into the fluid storage chamber, The liquid level rises from the fluid inflow port, exceeds the gas exhaust port, and the liquid level detection means floats, so that it is possible to handle a wide range from a small capacity to a large capacity of the drain. According to the second aspect of the present invention, even if the gas outlet is left open for some reason when the liquid level in the liquid storage chamber becomes equal to or lower than the predetermined height, the bucket chamber can be reliably and stably maintained. Since almost full water can be maintained, the recovery of gas can be ensured, and a wider range from a small capacity to a large capacity of drain can be handled. In the invention of claim 3, the gas exiting the vent hole rises vertically upward and heads for the gas discharge port, so that the gas is reliably prevented from being discharged from the lower liquid discharge port to the outside, and Recovery can be ensured. According to the invention of claim 4, even if the gas exiting the vent hole shifts upward from the vertical direction for some reason and rises, the gas finally reaches the gas discharge port, and therefore is discharged from the liquid discharge port to the outside. Can be prevented more reliably, and the gas can be recovered more reliably. According to the fifth aspect of the invention, the size can be reduced as compared with the case where the fluid storage chamber and the bucket chamber are provided separately.

[Brief description of drawings]

FIG. 1 is a diagram showing a lever-type inverted bucket drain trap according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which drain has started to flow in during an initial ventilation operation.

FIG. 3 is a diagram showing a state in which drained-in drainage is discharged during a ventilation initial operation.

FIG. 4 is a diagram showing a state at the beginning of inflow of gas following a drain in a normal operation.

FIG. 5 is a diagram showing a state in which gas has flowed into the vicinity of a fluid inlet 11 during normal operation.

FIG. 6 is a diagram showing a state in which the level of drain α has risen to the upper part of the fluid storage chamber 4 due to the inflow of drain during normal operation.

FIG. 7 is a diagram showing a state where drainage of drained inflow is performed during normal operation.

FIG. 8 is a diagram showing a configuration of a UFO reverse bucket type drain trap according to another embodiment of the present invention.

FIG. 9 is a view showing a conventional lever-type reverse bucket type drain trap.

FIG. 10 is a diagram showing an operating state of the lever-type inverted bucket drain trap shown in FIG. 9.

[Explanation of symbols]

 4 ... Fluid storage chamber 4a ... Pipe line 5 ... Fluid inlet 11 ... Fluid inlet 12 ... Liquid outlet 13 ... Gas outlet 17 ... Reverse bucket 18 ... Vent hole 26 ... Float 27 ... Valve seat 29 ... Valve 30 ... Valve Rod 31 ... Guide 32 ... Vent rod 34 ... Chain 35 ... Check valve α ... Drain β ... Gas

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Futoku Sato, Fukunori Sato, 1-2-1, Hirano-cho, Chuo-ku, Osaka City, Osaka Prefecture Osaka Gas Co., Ltd. (72) Masahiro Nakamoto, 2 Tagawa Kita, Yodogawa-ku, Osaka-shi, Osaka 1-30, Miyawaki Co., Ltd. (72) Inventor, Masafumi Takada 2-30-30, Tagawakita, Yodogawa-ku, Osaka City, Osaka Prefecture Miyawaki Co., Ltd.

Claims (5)

[Claims] 1. A reverse bucket type drain trap which temporarily stores fluid and gas flowing from the outside and discharges only the liquid to the outside automatically and intermittently, and has a fluid introduction port in the upper portion thereof. A fluid storage chamber that temporarily stores the fluid and gas introduced from the fluid introduction port, a fluid inlet port that communicates with the fluid storage chamber at a lower portion thereof, and a liquid discharge port that communicates with the outside at an upper portion thereof, A bucket chamber having a gas discharge port communicating with the fluid storage chamber at an upper portion thereof, a reverse bucket having a vent hole at an upper portion thereof and vertically movable stored in the bucket chamber, and vertically movable within the fluid storage chamber. Liquid level detection means for detecting whether or not the liquid level in the liquid storage chamber is at least a predetermined height exceeding the liquid discharge port by its buoyancy force, and vertical movement of the liquid level detection means Conjunction with,
When the liquid level in the liquid storage chamber becomes equal to or lower than a predetermined height, the gas discharge port and the vent hole are closed to prohibit the removal of the gas stored in the reverse bucket, and the bucket chamber is almost always When the liquid level in the liquid storage chamber is higher than a predetermined height, the gas discharge port and the vent hole are opened and the gas in the reverse bucket is exhausted to the fluid storage chamber via the bucket chamber. A valve mechanism for performing, the liquid discharge port is closed when the reverse bucket is raised,
A reverse bucket type drain trap characterized in that the liquid discharge port is opened when the reverse bucket is lowered, whereby the liquid is discharged from the liquid discharge port. 2. The reverse bucket type according to claim 1, further comprising a backflow blocking valve mechanism for blocking backflow of the liquid in the bucket chamber to the fluid storage chamber via the fluid inflow port. Drain trap. 3. The reverse bucket type drain trap according to claim 1, wherein the gas discharge port and the vent hole when the reverse bucket is fully raised are arranged substantially vertically above and below. . 4. The reverse bucket type drain trap according to claim 1, wherein the gas discharge port is provided above the liquid discharge port. 5. The fluid storage chamber is formed by surrounding all or part of the bucket chamber including the gas discharge port and the fluid inflow port.
The reverse bucket type drain trap described in 2, 3, or 4.