JP6037810B2 - Gas exhaust device - Google Patents

Description

  The present invention relates to a gas discharge device that removes gas in piping.

  When a liquid is sent using a pipe, bubbles may be generated in the liquid flowing through the pipe due to a change in temperature around the pipe, and the gas may be mixed into the liquid. When sending liquid to the pump using piping, if gas enters the liquid, the gas enters the pump, causing the pump to idle, causing pulsation, not only reducing liquid delivery efficiency, but also piping and pumps. May cause damage. In addition, when liquid is sent to a tank or the like, the gas generated in the pipe accumulates in the tank and the tank cannot be filled with a predetermined amount of liquid.

  Therefore, a plurality of air vent valves are provided as a gas discharge device in the pipe for sending the liquid in order to remove air, which is a gas. When a gas such as air is in the pipe, the air vent valve discharges the gas in an open state, and when the gas in the pipe is exhausted, the air vent valve is in a closed state to prevent the flowing liquid from leaking.

  For example, Patent Literature 1 discloses a gas discharge device having a simple structure in which a hole provided in a pipe is closed with a gas permeable film that allows gas to pass therethrough and prevents liquid from passing therethrough. By adopting a structure that allows only air, which is a gas, to be discharged through a gas permeable membrane, even if the inside of the pipe becomes full with a simple mechanism without using complicated machinery or power, the liquid does not leak into the pipe. The generated gas can be discharged continuously.

JP 2001-314701 A

  However, the above-described gas discharge device is suitable for removing a small amount of gas such as bubbles generated when a liquid is circulated in the pipe, but since a gas permeable membrane is used, a large amount of gas is removed. It is difficult to discharge all at once. For example, when a circulation pump or the like is started in a state where liquid is not circulating in the piping and the air is full, a large amount of liquid flows into the piping, so a large amount of air in the piping is discharged all at once. There is a need to. However, there is a problem that a large amount of air cannot be efficiently discharged in a state where it is blocked by the gas permeable membrane.

  The present invention has been made to solve the above-described problem, and allows a large amount of gas to be discharged while continuing to discharge the gas without leaking the liquid even if the liquid circulates in the pipe and becomes full. An object of the present invention is to provide a gas discharge device capable of performing the above.

In order to solve the above problems, the present invention proposes the following means.
A gas discharge device according to an aspect of the present invention is provided with a pipe extending in the axial direction, a gas discharge pipe provided to extend in the radial direction of the pipe, and communicating between the inside and the outside of the pipe, and impermeability of liquid. And a blocking portion having a gas permeable membrane that allows gas to pass therethrough, wherein the blocking portion is configured to connect the gas discharge pipe to the piping by the gas permeable membrane based on a force acting on the liquid flowing through the piping. It is characterized in that it is closed so that the inside and outside are separated.

  According to the gas removal structure having such a configuration, the gas discharge pipe is closed at the closing portion based on the force acting on the liquid flowing through the pipe. Does not work and the gas exhaust pipe is open, and a large amount of air can be exhausted at once. And if a liquid distribute | circulates the inside of piping, force will work and will obstruct | occlude a gas exhaust pipe, and even if the liquid which distribute | circulates the inside of piping will be full, it will not leak. In addition, even after the closing, since the closing portion has the gas permeable film, only the gas mixed in the liquid flowing through the pipe can be continuously discharged by the gas permeable film. As a result, a large amount of gas can be discharged when there is no liquid in the pipe, and it is possible to continue to discharge the gas without leaking the liquid even if the liquid circulates in the pipe and becomes full.

  Further, the gas discharge device according to another aspect of the present invention is characterized in that the closing portion closes the gas discharge pipe as the liquid level of the liquid flowing in from the pipe in the gas discharge pipe rises. To do.

  According to the gas removal structure having such a configuration, by closing the gas discharge pipe after the water level in the gas discharge pipe rises, the gas discharge pipe is opened until a certain water level is reached. Can be discharged. And if a water level rises, it can prevent that the liquid which distribute | circulates the inside of piping is leaked even if it fills up by obstruct | occluding a gas exhaust pipe by the obstruction | occlusion part. Thus, even if the flow path through which liquid or gas can pass is blocked, only the gas mixed in the liquid flowing through the piping can be continuously discharged by the gas permeable film because the closed portion has the gas permeable film. . As a result, a large amount of gas can be discharged when there is no liquid in the pipe, and it is possible to easily discharge the gas without leaking the liquid even if the liquid circulates in the pipe and becomes full.

  Moreover, the gas discharge apparatus which concerns on the other aspect of this invention is characterized by the said obstruction | occlusion part rising by receiving buoyancy by the raise of the said water level.

  According to the gas removal structure having such a configuration, as the water level rises, the closed portion rises due to the buoyancy acting from the liquid in the pipe and closes the gas discharge pipe. With the inflow of the liquid, it is possible to easily form a structure that automatically closes the gas discharge pipe before the liquid becomes full and leaks.

  Furthermore, the gas discharge device according to another aspect of the present invention includes a detection unit that detects the water level, a drive unit that moves the blocking unit to block the gas discharge pipe, and a predetermined rule by the detection unit. And a control unit that causes the driving unit to move the closing unit based on detection of the rise in the water level up to the water level.

  According to the gas discharge device having such a configuration, when water rises to a predetermined specified water level, the liquid is detected by the detection unit, and the gas discharge pipe is closed by the closing unit via the control unit, whereby the amount of air discharged Can be controlled. This makes it possible to efficiently discharge air.

  The gas discharge device according to another aspect of the present invention is characterized in that the closing portion closes the gas discharge pipe based on a force acting in a flow direction of the liquid flowing through the pipe. .

  According to the gas discharge device having such a configuration, the gas discharge device automatically receives the force acting in the flow direction of the liquid and closes at the closed portion so that the gas is automatically discharged if it flows through the pipe regardless of the properties of the liquid. The tube can be occluded. As a result, the gas discharge pipe can be easily closed even when a liquid having a high density is circulated in the pipe.

  According to the gas discharge device of the present invention, the closed portion having the gas permeable membrane closes the gas discharge pipe by the force acting on the liquid flowing in the pipe, so that a large amount of gas is generated in a state where there is little liquid in the pipe. Even if the liquid can be discharged, even if the liquid circulates in the pipe and becomes full of water, the gas can be continuously discharged without leaking the liquid.

It is a cross-sectional view explaining the gas discharge apparatus which concerns on 1st embodiment of this invention. It is a cross-sectional view explaining the gas discharge apparatus which concerns on 2nd embodiment of this invention. It is a cross-sectional view explaining the gas discharge apparatus which concerns on 3rd embodiment of this invention. It is a cross-sectional view explaining the gas discharge apparatus which concerns on 4th embodiment of this invention. It is a cross-sectional view explaining the 1st modification of the gas exhaust apparatus which concerns on 1st embodiment of this invention. It is a cross-sectional view explaining the 2nd modification of the gas exhaust apparatus which concerns on 1st embodiment of this invention. It is a cross-sectional view explaining the 3rd modification of the gas exhaust apparatus which concerns on 1st embodiment of this invention. The 4th modification of the gas exhaust apparatus which concerns on 1st embodiment of this invention is shown, The same figure (a) is a cross-sectional view explaining the whole 4th modification, The same figure (b) demonstrates a disk obstruction | occlusion part. It is sectional drawing in AA. It is a transverse cross section explaining the 5th modification of a gas exhauster concerning a first embodiment of the present invention. It is a transverse cross section explaining the 6th modification of a gas exhauster concerning a first embodiment of the present invention.

Hereinafter, a first embodiment according to the present invention will be described with reference to FIG.
As shown in FIG. 1, the gas discharge device according to the first embodiment includes a pipe 1 extending along the axis O direction (left and right direction in FIG. 1) and a direction perpendicular to the axis O direction (up and down direction in FIG. 1). A gas exhaust pipe 2 extending from the pipe 1 and a closing portion 30 disposed inside the gas exhaust pipe 2 are provided.

  The pipe 1 has a circular cross section and extends in the direction of the axis O. In the pipe 1, water W, which is a liquid, can flow inside. By starting a pump (not shown), the water W starts to flow into the pipe 1.

  The gas exhaust pipe 2 is provided by connecting the pipe 1 to the inside and outside so as to extend from the pipe 1 to the upper side in the vertical direction that is the radial direction of the pipe 1. The gas discharge pipe 2 is connected to the upper part of the pipe 1 and extends in the vertical direction, and the gas discharge pipe connection part 21 is connected to the upper surface of the gas discharge pipe connection part 21 and is open on the upper side in the vertical direction. have.

The gas discharge pipe connecting portion 21 has a cylindrical shape and extends upward in the vertical direction, and the lower side in the vertical direction is connected to the pipe 1. The gas discharge pipe connecting portion 21 is closed on the upper side in the vertical direction, and a plurality of holes spaced apart in the circumferential direction are formed on the upper surface, and gas is connected to each of the holes so as to close the holes. A discharge pipe gas permeable membrane 23 is stretched. The gas exhaust pipe gas permeable membrane 23 is made of a membrane material similar to a gas permeable membrane 303 described later.
The gas discharge pipe opening 22 has a cylindrical shape with a smaller diameter than the gas discharge pipe connection portion 21 and extends upward in the vertical direction. The gas discharge pipe opening portion 22 is disposed coaxially with the gas discharge pipe connection portion 21 and extends in the vertical direction. The lower surface is connected to the upper surface of the gas exhaust pipe connecting portion 21. The gas discharge pipe opening 22 communicates with the upper opening through the inside of the gas discharge pipe connection 21 and the gas discharge pipe opening 22 from the pipe 1.

The closing part 30 is provided so that the gas exhaust pipe 2 can be closed and opened. The closing portion 30 extends in the vertical direction and is disposed inside the gas exhaust pipe 2. The closing part 30 is separated from the inner peripheral surface of the gas discharge pipe opening 22 connected to the upper surface of the closing part main body 301 and the upper surface of the closing part main body 301, which is arranged separately from the inner peripheral surface of the gas discharge pipe connecting part 21. The guide part 302 is disposed, the gas permeable film 303 is disposed on the lower side of the closing part main body 301, and the fall prevention collar part 304 provided on the upper surface of the guide part.
The closing portion main body 301 has a bottomed cylindrical shape extending in the vertical direction. A hole is formed at the center of the bottom surface, and a gas permeable membrane 303 is stretched to close the hole. The closing part main body 301 is arranged coaxially with the gas exhaust pipe connecting part 21 and has an outer peripheral surface spaced apart from an inner peripheral surface of the gas exhaust pipe connecting part 21.
The guide portion 302 has a cylindrical shape with a smaller diameter than the closing portion main body 301 and extends in the vertical direction. The guide portion 302 is arranged coaxially with the closing portion main body 301 and connected to the upper surface of the closing portion main body 301. . The guide portion 302 is arranged such that the outer peripheral surface is separated from the inner peripheral surface of the gas exhaust pipe opening 22.
The closing part 30 communicates from the lower hole part of the closing part main body 301 to the opening above the guide part 302.

The gas permeable membrane 303 is made of a film material that does not allow the water W that is a liquid to pass and allows only the air A that is a gas to pass. The gas permeable membrane 303 has a film shape and is provided in the lower hole portion of the closing portion main body 301. As a membrane material used for the gas permeable membrane 303, for example, a fluorine resin polymer or a silicone resin polymer is used.
When the closing part 30 closes the gas exhaust pipe 2, the gas permeable membrane 303 of the closing part 30 separates the inside and outside of the gas exhaust pipe 2.
The fall prevention collar 304 is formed with a plurality of rectangular protrusions projecting from the outer peripheral surface on the upper surface of the guide part 302, and the protrusions are spaced apart.

Next, the operation of the gas discharge device according to the first embodiment having the above-described configuration will be described.
In the gas discharge device of the first embodiment as described above, when the pump is started, water W that is a liquid flows into the pipe 1. At the stage where the water W starts to flow into the pipe 1, the closing part 30 is in a state in which the drop prevention hook part 304 is caught by the gas discharge pipe 2. For this reason, the blocking portion 30 does not fall into the pipe 1 even when there is no water W in the pipe 1.
In this state, when the water W starts to flow into the pipe 1, the air A, which is a gas filled in the pipe 1, passes through the gas discharge pipe 2 to the outside through the gap of the protrusion of the fall prevention collar portion 304. Discharged.
Thereafter, when the water level of the water W flowing through the pipe 1 starts to rise, the closing portion 30 receives from the lower side of the closing portion main body 301 buoyancy F that is a force acting from the water W that is the liquid flowing through the pipe 1. Thus, the closing portion 30 starts to rise as the water level rises in the vertical direction. At this time, the guide portion 302 of the closing portion 30 extends along the inner peripheral surface of the gas discharge pipe opening portion 22, and the closing portion main body 301 also moves upward along the inner peripheral surface of the gas discharge tube connecting portion 21. Moving. Between the outer peripheral surface of the guide part 302 and the inner peripheral surface of the gas discharge pipe opening 22, between the outer peripheral surface of the blocking part main body 301 and the inner peripheral surface of the gas discharge pipe connecting part 21, and the upper surface of the blocking part main body 301. And the inner surface of the upper surface of the gas discharge pipe connection portion 21, there are gaps, and the water W and the air A can be circulated, so that the air A continues to be discharged to the outside from these gaps.

  Then, when the water W fills the pipe 1, the water W flows from the pipe 1 into the gas discharge pipe connection portion 21 that is the gas discharge pipe 2. As the water level in the gas exhaust pipe connecting portion 21 that is the gas exhaust pipe 2 rises, the upper surface of the closing portion main body 301 and the inner surface of the upper surface of the gas exhaust pipe connecting portion 21 are grounded, and there is no gap. As a result, there is no gap between the closed portion 30 and the gas discharge pipe 2, and there is no flow path through which the water W or the air A can pass, so that even if the water W becomes full, it does not leak to the outside. Further, the air A accumulated in the gap between the outer peripheral surface of the closing portion main body 301 and the inner peripheral surface of the gas exhaust pipe connecting portion 21 is a gas exhaust pipe gas permeable membrane provided on the upper surface of the gas exhaust pipe connecting portion 21. 23 is discharged to the outside.

On the other hand, the air A remaining in the pipe 1 or the air A mixed in the circulating water W passes through the gas permeable membrane 303 provided on the lower side of the block main body 301 and the guide portion 302. It continues to be discharged outside through the inside.
Further, when the pump is stopped and the water W in the pipe 1 is exhausted and the water level is lowered, the blocking portion 30 also starts to fall in accordance with the water level. When the opening of the gas discharge pipe 2 is opened again and the flow path of the air A is secured, when the pump is started again and the water W flows through the pipe 1, a large amount of air A is discharged from the gas discharge pipe 2. Can be discharged again.

  According to the gas discharge device as described above, since the gas discharge pipe 2 is closed based on the force of the water W flowing in the pipe 1, the gas discharge pipe connecting portion 21 and the gas which are the gas discharge pipe 2 are used. The gap between the discharge pipe opening 22 and the closing portion main body 301 and the guide portion 302 as the closing portion 30 does not block the gap when the water W in the pipe 1 is small and buoyancy does not act on the closing portion 30. . Therefore, a large amount of air A can be discharged simultaneously from the opening of the gas discharge pipe opening 22 through this gap that is inside the gas discharge pipe 2. And if a liquid distribute | circulates in the piping 1, since buoyancy will act from the water W which is a liquid and this clearance gap will be obstruct | occluded, neither water W nor air A can be discharged | emitted from the opening of the gas exhaust pipe opening part 22. FIG. Even if the water W flowing through the pipe 1 becomes full, it does not leak to the outside. In addition, even after the gap between the gas discharge pipe 2 and the closing portion 30 is closed, the water W flowing through the pipe 1 can be obtained by having the gas permeable membrane 303 below the closing portion main body 301 that is the closing portion 30. Only mixed gas can continue to be discharged. As a result, a large amount of gas can be discharged in a state where there is little liquid in the pipe 1, and gas can be continuously discharged without leaking the liquid even when the liquid circulates in the pipe 1 and becomes full.

  Further, after the water level in the gas discharge pipe connection portion 21 that is the gas discharge pipe 2 rises, the gap between the gas discharge pipe connection portion 21 that is the gas discharge pipe 2 and the closing portion main body 301 that is the closing portion 30 is closed. By doing so, the opening of the gas discharge pipe 2 is opened by the gap between the guide portion 302 and the gas discharge pipe opening 22 or the gap between the closing portion main body 301 and the gas discharge pipe connection portion 21 until a certain water level is reached. Can be maintained. Therefore, a large amount of air A accumulated in the pipe 1 and pushed out by the water W can be discharged all at once.

  Then, after rising above a certain level, the gap with the gas discharge pipe 2 is closed by the closing portion 30 provided with the gas permeable membrane 303, and the water W that is the liquid flowing through the pipe 1 becomes full. However, it can prevent leaking outside. Even if the flow path through which the water W and air A can pass is closed in this way, only the gas mixed in the water W flowing in the pipe 1 is discharged by having the gas permeable membrane 303 below the closed portion 30. Can continue. As a result, a large amount of gas can be discharged when there is no liquid in the pipe 1, and it is possible to easily continue to discharge gas without leaking the liquid even if the liquid circulates in the pipe 1 and becomes full. Become.

  In addition, as the water level rises, the blocking portion 30 rises by receiving the buoyancy F that is the force acting from the water W flowing through the pipe 1, and the blocking portion 30 closes the gap with the gas discharge pipe 2. With the inflow of water W into the gas discharge pipe 2, it is possible to easily obtain a structure that automatically closes the gas discharge pipe 2 before the water W becomes full and leaks.

Next, the gas discharge device of the second embodiment will be described with reference to FIG.
In the second embodiment, the same components as those in the first embodiment are given the same reference numerals, and detailed description thereof is omitted. The gas discharge device according to the second embodiment is different from the first embodiment in that it has a structure in which the closing portion 30 is moved using the control portion 5 to close the gas discharge pipe 2.

That is, the gas discharge device according to the second embodiment controls the cylindrical gas discharge pipe 20 instead of the gas discharge pipe 2 according to the first embodiment and outputs a signal for moving the closing lid in response to a signal from the detection unit 4. And a second closing portion (closing portion) 31 that closes the cylindrical gas discharge pipe 20 in response to a signal from the control portion 5.
The cylindrical gas discharge pipe 20 extends in a cylindrical shape from the pipe 1 to the upper side in the vertical direction, and is connected to the pipe 1 at the lower side in the vertical direction.

The detection unit 4 has a water level meter installed at a position that is a predetermined specified water level, and sends a signal output from the water level meter to the control unit 5. The water level gauge is provided at a position that is a predetermined specified water level on the side surface of the cylindrical gas discharge pipe 20, and outputs a signal when it comes into contact with the water W. The water level meter is a contact type in the present embodiment, but is not limited to this. For example, a known water level meter such as a float type, an ultrasonic type or a capacitance type may be used.
The controller 5 receives the signal output from the detector 4 and detects that the water level in the cylindrical gas discharge pipe 20 has risen to the specified water level, and the second closing part 31 closes the cylindrical gas discharge pipe 20. A movable signal is output.

The second closing part 31 receives a signal from the control part 5 and is movable, a second closing part main body 312 that closes the cylindrical gas discharge pipe 20, and a gas permeation disposed in the second closing part main body 312. A film 303.
The driving unit 311 is connected to the control unit 5 and is fixed to the upper end of the cylindrical gas discharge pipe 20. The drive unit 311 can be rotated with the direction orthogonal to the axis O direction and the vertical direction (the depth direction in FIG. 2) as the axial direction, and is rotated by a signal from the control unit 5.
The second closing part main body 312 has a disk shape and a part of the side surface is fixed to the driving part 311. The second closing part main body 312 can rotate around the driving part 311 to close the opening above the cylindrical gas discharge pipe 20. ing. The closing part main body 301 has a circular hole at the center, and the same gas permeable membrane 303 as that of the first embodiment is stretched in the hole.

Next, the operation of the gas discharge device of the second embodiment having the above configuration will be described.
In the gas discharge device according to the second embodiment as described above, water W, which is a liquid, flows into the pipe 1 when the pump is activated as in the first embodiment. When the water W starts to flow in, the air A that is a gas filled in the pipe 1 is discharged to the outside through the cylindrical gas discharge pipe 20.
Thereafter, when the level of the water W flowing through the pipe 1 rises and the water W flows into the cylindrical gas discharge pipe 20 and further rises to the specified water level, the water level meter as the detection unit 4 detects the water W. . Then, a signal is output from the detection unit 4, and a signal for moving the second closing unit 31 is output by the control unit 5. The second closing part main body 312 which is the second closing part 31 receives the signal from the control part 5 and rotates from the driving part 311 to close the opening on the upper side of the cylindrical gas discharge pipe 20. Thereby, even if the water W becomes full from the opening of the cylindrical gas discharge pipe 20, it does not leak to the outside.
On the other hand, even after the second closing portion 31 closes the opening of the cylindrical gas discharge pipe 20, the air A remaining in the pipe 1 or the air A mixed in the circulating water W is provided in the second closing portion main body 312. The gas continues to be discharged to the outside through the gas permeable membrane 303.

  When the pump is stopped and the water W in the pipe 1 runs out and the water level drops, the water level gauge as the detection unit 4 and the water W do not come into contact with each other. 312 rotates from the drive unit 311 as the starting point, and the opening of the cylindrical gas discharge pipe 20 begins to be opened. When the opening of the cylindrical gas discharge pipe 20 is opened again and the flow path of the air A is secured, when the pump is started again and the water W flows through the pipe 1, a large amount of air A is discharged into the cylindrical gas discharge pipe 20 Can be discharged again.

  According to the gas discharge device as described above, when the water level in the pipe 1 rises and the water W rises to a predetermined specified water level in the cylindrical gas discharge pipe 20, the water level meter as the detection unit 4 detects the water W. The cylindrical gas discharge pipe 20 is closed by the second closing portion 31 via the control portion 5. Therefore, the discharge amount of air A is determined by arbitrarily specifying the position of the specified water level by the pipe 1 used or by shifting the timing at which the second closing part 31 closes the cylindrical gas discharge pipe 20 by the control part 5. Can be controlled. Thereby, it becomes possible to exhaust air A efficiently for every pipe 1 used.

Next, the gas discharge apparatus of 3rd embodiment is demonstrated with reference to FIG.
In the third embodiment, the same components as those in the first embodiment are given the same reference numerals, and detailed description thereof is omitted. The gas discharge device according to the third embodiment has a structure in which the gas discharge pipe 2 is closed by moving the closing part 30 using the force in the flow direction of the water W that is the liquid in the pipe 1. Different from one embodiment.

That is, the gas discharge device of the third embodiment includes a cylindrical gas discharge pipe 20 similar to that of the second embodiment as the gas discharge pipe 2, and further receives a force in the flow direction of the liquid in the pipe 1 to provide a cylindrical gas discharge pipe. A third closing portion (blocking portion) 32 that closes 20 is provided.
The third closing portion 32 includes a water receiving portion 321 suspended in the pipe 1, a third closing portion main body 322 that directly closes the opening of the cylindrical gas discharge pipe 20, and an elasticity connected to the third closing portion main body 322. It has a spring 323 which is a member.
The 3rd obstruction | occlusion part main body 322 comprises disk shape, has a circular hole in the center, and the gas permeable film 303 similar to 1st embodiment is stretched | stretched in this hole.

The water receiving portion 321 includes an umbrella body 321a that forms a hemisphere during expansion, and a string-like member 321b that connects the umbrella body 321a and the third closing portion main body 322. The water receiving portion 321 is arranged by hanging the umbrella body 321a from the third closing portion main body 322 through the string-like member 321b into the pipe 1.
A known spring material is used for the spring 323. One of the springs 323 is connected to the third closing portion main body 322, and the other is connected to the upper wall surface of the opening of the cylindrical gas discharge pipe 20. It is arranged while elastically pulling on the upper side in the vertical direction. The spring 323 may be a known elastic member, and may be an elastic member that can elastically pull the third closing portion main body 322, such as a rubber material.

Next, the operation of the gas discharge device according to the third embodiment having the above-described configuration will be described.
In the gas discharge device according to the third embodiment as described above, water W that is a liquid flows into the pipe 1 when the pump is activated as in the first embodiment. When the water W starts to flow in, the air A that is a gas filled in the pipe 1 is discharged to the outside through the cylindrical gas discharge pipe 20.
Thereafter, when the water level of the water W flowing through the pipe 1 rises and the water W rises to a certain water level, the umbrella body 321a receives and expands the water W and receives a force in the flow direction of the water W. As a result, when the force with which the third closing portion main body 322 is pulled downward in the vertical direction via the string-like member 321b is larger than the force pulled upward in the vertical direction by the spring 323 that is an elastic member, The closing part main body 322 descends and closes the cylindrical gas discharge pipe 20. Thereby, even if the water W becomes full from the opening of the cylindrical gas discharge pipe 20, it does not leak to the outside. In addition, by changing the length of the string-like member 321b and adjusting the position of the umbrella body 321a, the opening of the cylindrical gas discharge pipe 20 can be closed when the water W in the pipe 1 reaches an arbitrary water level. it can.

On the other hand, even after the third closing portion main body 322 closes the opening of the cylindrical gas discharge pipe 20, the air A remaining in the pipe 1 or the air A mixed in the circulating water W remains in the third closing portion main body 322. It continues to be discharged to the outside through the gas permeable membrane 303 provided.
When the pump is stopped and the water W in the pipe 1 disappears and the water level drops, the force with which the umbrella 321a is pulled in the flow direction of the water W becomes weak, so that the force pulled by the spring 323, which is an elastic member. , The third closing portion main body 322 is raised, and the opening of the cylindrical gas discharge pipe 20 is opened. Then, when the opening of the cylindrical gas discharge pipe 20 is opened again and the flow path of the air A is secured, when the pump is started again and the water W flows in the pipe 1, a large amount of air A is discharged into the cylindrical gas. It can be discharged again from the tube 20.

According to the gas discharging apparatus as described above, the third blocking portion main body 322 is lowered and closed by receiving the flowing force of the water W, which is the force acting in the flow direction of the water W, so that the property of the liquid Regardless of this, the cylindrical gas discharge pipe 20 can be automatically closed if it flows through the pipe 1. This makes it possible to easily close the cylindrical gas discharge pipe 20 even when a high-density liquid is circulated in the pipe 1.
Moreover, since the 3rd obstruction | occlusion part 32 can be provided in the exterior of the piping 1, it becomes possible to install a gas exhaust apparatus also easily with respect to the piping 1 already laid.

Next, a gas discharge device according to a fourth embodiment will be described with reference to FIG.
In the fourth embodiment, the same components as those in the first embodiment are given the same reference numerals, and detailed description thereof is omitted. The gas discharge device according to the fourth embodiment is provided with an external blocking mechanism (blocking portion) 6 that uses the static pressure of water W, which is a liquid in the pipe 1, instead of the blocking portion 30. Is different.

That is, the gas discharge device of the fourth embodiment includes a cylindrical gas discharge pipe 20 similar to that of the second embodiment instead of the gas discharge pipe 2 of the first embodiment, and includes the external closing mechanism 6 instead of the closing portion 30. I have.
The external closing mechanism 6 includes a static pressure receiving pipe 61 formed in the pipe 1 adjacent to the cylindrical gas discharge pipe 20, a static pressure receiving part 62 disposed in the static pressure receiving pipe 61, and a static pressure receiving part 62. A pressing part 63 that presses the pipe toward the pipe 1, an external closing lid 64 that is movable so as to close the cylindrical gas discharge pipe 20, a pulley 65 that connects the static pressure receiving part 62 and the external closing lid 64, and a static pressure receiver Between the pipe 61 and the cylindrical gas discharge pipe 20, there is a pipe throttle part 66 for reducing the diameter of the pipe 1.

The static pressure receiving pipe 61 has a cylindrical shape, and is arranged on the upper side of the pipe 1 so as to be spaced apart from the cylindrical gas discharge pipe 20 and open on the upper side in the vertical direction.
The static pressure receiving portion 62 has a disc shape and is slidably disposed along the inner peripheral surface of the static pressure receiving tube 61.
The pressing portion 63 is made of a spring material that is an elastic member. One end of the pressing portion 63 is fixed to the wall surface 7 provided on the vertical direction of the static pressure receiving portion 62 and the other end is fixed to the static pressure receiving portion 62. ing. The pressing portion 63 is disposed by compressing a spring material that is an elastic member, and presses the static pressure receiving portion 62 downward in the vertical direction.

The external closing lid 64 has a bottomed cylindrical shape extending in the vertical direction and having a bottom surface on the upper side in the vertical direction, and a hole is formed in the center of the bottom surface. A gas permeable membrane 303 is stretched in the hole.
The pulley unit 65 connects the static pressure receiving unit 62 and the buoyancy F closing unit 30 via two pulleys. The pulley unit 65 moves the static pressure receiving unit 62 and the external blocking lid 64 so that the external blocking lid 64 is lowered when the static pressure receiving unit 62 is raised and the external blocking lid 64 is raised when the static pressure receiving unit 62 is lowered. Connected.
The pipe throttle portion 66 is disposed between the static pressure receiving pipe 61 and the cylindrical gas discharge pipe 20, and reduces the diameter of the pipe 1 toward the cylindrical gas discharge pipe 20.

  With such a structure, when the water level in the pipe 1 rises, the static pressure receiving part 62 disposed in the static pressure receiving pipe 61 receives a static pressure from the water W flowing in the pipe 1 and presses the pressure part. Ascending is started by pushing 63 upward in the vertical direction. Along with this, the external closing lid 64 starts to descend via the pulley unit 65. Then, before the water W in the cylindrical gas discharge pipe 20 becomes full, the external closing lid 64 closes the cylindrical gas discharge pipe 20. When the water W flowing in the pipe 1 becomes full, not only the obtained static pressure receiving portion 62 but also the external closing lid 64 receives the static pressure from the flowing water W. However, since the pipe throttle portion 66 is provided in the pipe 1, the flow speed of water is faster on the downstream side where the cylindrical gas discharge pipe 20 is located. For this reason, the pressure applied to the external closing lid 64 becomes smaller than the pressure applied to the static pressure receiving portion 62, and the external closing lid 64 can be kept floating to keep closing the cylindrical gas discharge pipe 20.

  In addition, by separating the cylindrical gas discharge pipe 20 and the static pressure receiving pipe 61 so as to cause a pressure loss while the water W flows through the pipe 1, the external blocking mechanism 6 can be provided without providing the pipe throttle 66. Can be provided. Thereby, since the structure which closes the gas exhaust pipe 2 with a static pressure can be provided from the exterior of the piping 1, it becomes possible to install easily also to the piping 1 already laid.

The present invention is not limited to the present embodiment, and various modifications are allowed without departing from the scope of the present invention. For example, FIG. 5 to FIG. 10 are given as modifications of the first embodiment.
As shown in FIG. 5, as a first modification, a gas permeable membrane 303 may be provided on the side surface instead of the bottom surface of the closing portion main body 301.
By adopting such a structure, the outer peripheral surface of the closing portion main body 301 and the gas exhaust pipe connection portion can be used as the non-film gas exhaust pipe 2a in which the gas exhaust pipe gas permeable membrane 23 is not provided on the upper surface of the gas exhaust pipe connection portion 21. The air A accumulated in the gap with the inner peripheral surface of 21 can be discharged, and a gas discharge device can be formed with a simpler structure.
In the case of the first modification, a gas exhaust pipe gas permeable membrane 23 may be further included.

As shown in FIG. 6, as a second modification, the bottom surface of the closing portion main body 301 may be a disk shape and may be a flat plate closing portion main body 301 a having a thin plate thickness.
By adopting such a structure, even if the gas exhaust pipe gas permeable membrane 23 is not provided on the upper surface of the gas exhaust pipe connection portion 21, the outer peripheral surface of the closing portion main body 301 and the inner peripheral surface of the gas exhaust pipe connection portion 21. The air A accumulated in the gap can be discharged, and a gas discharge device can be formed with a simpler structure.

Further, as shown in FIG. 7, as a third modification, a simple closing portion 30 a in which the gas permeable membrane 303 is not provided in the closing portion 30 and a gas on the upper surface of the gas discharge pipe connecting portion 21 as in the first embodiment. It has a discharge pipe gas permeable membrane 23.
By adopting such a structure, as in the first embodiment, a large amount of gas can be discharged when the amount of liquid in the pipe 1 is small, and the water W, which is a liquid, circulates in the pipe 1 and becomes full. However, the gas can be continuously discharged from the gas exhaust pipe gas permeable membrane 23 without leaking the liquid. Furthermore, the simple closing part 30a can be formed with a structure that only closes the gas discharge pipe 2 by buoyancy.

It should be noted that the simple closing portion 30a in the third modification does not overlap with the gas exhaust pipe gas permeable membrane 23 even when the water W is full and the simple closing portion 30a rises and contacts the upper surface of the gas exhaust pipe connection portion 21. It is preferable to use a size.
By setting it as such a structure, the gas exhaust by the gas exhaust pipe gas permeable membrane 23 is not prevented.

Furthermore, as shown in FIGS. 8A and 8B, as a fourth modification, the closed portion 30 having the minimum configuration in the first embodiment has a disk shape and a hole in the center. In addition, the disk closing portion 33 having the gas permeable membrane 303 closing the hole portion may be used.
The disk closing part has a disk shape, and has a gas discharge notch part 33a in which a part of the outer periphery is cut out in a rectangular shape and a gas permeable film 303 in the center.
By adopting such a structure, a large amount of gas can be discharged from the gas discharge notch 33a in a state where there is little liquid in the pipe 1, and even if the water W, which is liquid, circulates in the pipe 1 and becomes full. The gas can be continuously discharged from the gas permeable membrane 303 without leaking the liquid. Thereby, it becomes possible to form the obstruction | occlusion part 30 with a very simple structure.

  In addition, it is preferable to provide a drop waterproof structure so that the disk closing portion 33 does not fall into the pipe 1 when the liquid does not flow in the pipe 1 on the inner peripheral surface of the gas discharge pipe connection portion 21. The fall prevention structure can be easily formed by providing a convex drop prevention part 34 on the inner peripheral surface of the gas discharge pipe connection part 21.

Moreover, as shown in FIG. 9, when using the disk obstruction | occlusion part 33 shown in FIG. 6 as a 5th modification, you may provide the obstruction | occlusion part guide 35. FIG. The closing portion guide 35 includes a plurality of guide hole portions 35a provided in the outer peripheral edge of the disc closing portion 33 in the circumferential direction, and the disc closing portion 33 on the inner peripheral surface of the gas discharge pipe connecting portion 21 in the vertical direction. A projection 35b sandwiched between the upper and lower portions and a guide bar 35c disposed at a position corresponding to the guide hole 35a along the vertical direction between the projections 35b.
With this structure, the closing portion guide 35 is configured such that the guide rod 35c provided on the projection portion 35b is fitted into the guide hole portion 35a of the disk closing portion 33, thereby causing the disk closing portion 33 to move in the vertical direction. Can only be moved. Further, even when the water W is not flowing through the pipe 1, the disk closing part 33 does not fall into the pipe 1 due to the protrusion 35 b. As a result, it is possible to obtain a gas removal structure that is capable of performing its function stably with a simple structure.

Furthermore, as shown in FIG. 10, as a sixth modification, a rotationally movable part 331 that rotatably connects a part of the side surface of the disk closing part 33 and a part of the inner peripheral surface of the gas discharge pipe opening part 22. You may have.
By adopting such a structure, the disk closing part 33 rotates around the rotation axis and rises when receiving the buoyancy F as the water level of the water W in the pipe 1 rises, and the gas discharge pipe opening 22 Can be occluded.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the configurations and combinations of the embodiments in the embodiments are examples, and the addition and omission of configurations are within the scope not departing from the gist of the present invention. , Substitutions, and other changes are possible. Further, the present invention is not limited by the embodiments, and is limited only by the scope of the claims.

  The gas corresponding to the present invention is not limited to the air A. For example, nitrogen that is used as a pressurizing medium when pressure is applied to the liquid and the liquid in the pipe 1 is sent instead of the pump may be used. . Moreover, the liquid which distribute | circulates the inside of the piping 1 is not limited to the water W, For example, the other aqueous solution with high viscosity may be sufficient.

O ... Axis 1 ... Pipe 2 ... Gas exhaust pipe 21 ... Gas exhaust pipe connection 22 ... Gas exhaust pipe opening 23 ... Gas exhaust pipe gas permeable membrane 30 ... Occlusion part 301 ... Occlusion part body 302 ... Guide part 303 ... Gas permeation Membrane 304 ... Fall prevention collar W ... Water A ... Air F ... Buoyancy 20 ... Cylindrical gas discharge pipe 4 ... Detection part 5 ... Control part 31 ... Second closing part 311 ... Drive part 312 ... Blocking part body 32 ... Third blocking 321 ... Water receiving part 321a ... Umbrella 321b ... String member 322 ... Third closing part main body 323 ... Spring 301a ... Flat plate closing part main body 33 ... Disc closing part 33a ... Gas exhaust notch part 34 ... Projection part 35 ... Blocking portion guide 35a ... guide hole portion 35b ... projection portion 35c ... guide rod 331 ... rotating movable portion 6 ... external closing mechanism 61 ... static pressure receiving tube 62 ... buoyancy receiving portion 63 ... pressing portion 6 ... outside the block lid 65 ... pulley unit 66 ... pipe throttle portion

Claims (5)

Piping extending in the axial direction;
A gas exhaust pipe provided so as to extend in the radial direction of the pipe and communicating between the inside and outside of the pipe;
Comprising a blocking portion having a gas permeable membrane that disables liquid permeation and allows gas permeation;
The gas closing device, wherein the closing portion closes the gas discharge pipe so that the inside and outside of the pipe are separated by the gas permeable film based on a force acting on the liquid flowing through the pipe.   2. The gas discharge device according to claim 1, wherein the closing portion closes the gas discharge pipe as the liquid level of the liquid flowing from the pipe in the gas discharge pipe rises.   The gas discharge device according to claim 2, wherein the blocking portion rises by receiving buoyancy due to the rise in the water level. A detection unit for detecting the water level;
A drive unit for moving the closing part to close the gas discharge pipe;
Based on the detection of the rise of the water level up to a predetermined specified water level by the detection unit, a control unit for causing the drive unit to move the closing unit,
The gas discharge device according to claim 2, comprising:   2. The gas discharge device according to claim 1, wherein the closing portion closes the gas discharge pipe based on a force acting in a flow direction of the liquid flowing through the pipe.

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