JPH0531359Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is applicable to drain collected in a container where internal pressure acts, such as when drain is removed by an air filter from high-pressure air supplied to pneumatic equipment. The present invention relates to a drain discharge device that automatically discharges drain every time a substantially fixed amount of drain is accumulated.

Problems to be solved by conventional techniques and ideas Conventionally, this type of drain discharge device has a through hole formed in the bottom of the drain container where internal pressure acts.
A piston is formed approximately at the center in the length direction, and a drain shaft body is fitted on the bottom side of the piston with a drain channel extending from the inside of the drain container to the outside. A cylinder with an upper lid, which has a valve body formed at its lower end that can be opened and closed by moving toward and away from the cylinder, is tightly fitted in the cylinder so that it can move up and down freely. It has a structure in which a float is fitted around the cylinder to open and close the inlet for introducing air from the drain container into the piston chamber, which is configured to move up and down freely. is pushed up and the air inlet opens, and when air is introduced into the piston chamber and its pressure exceeds a certain value, the cylinder is lifted against the spring force and the space between the valve body and the bottom of the drain container opens. Accordingly, there is a known system in which drain is discharged to the outside through a drain drainage channel.

By the way, in such a conventional drain discharge device, the float valve part that opens and closes the air inlet by raising and lowering the float, and the drain valve part that is controlled to open and close by opening and closing the float valve are assembled integrally. Since the structure is such that if one of them breaks, it is necessary to replace the whole thing, which is uneconomical.In addition, in order to keep the piston chamber airtight, the inner circumference of the cylinder and the piston of the drain shaft must be replaced. The structure allows for tight fitting and sliding between the outer periphery of the cylinder and between the center hole of the cylinder top cover and the shaft of the drain shaft on the top side of the piston. If it contains foreign matter such as dust, there is a risk that the foreign matter will get stuck in the sliding parts and cause malfunction, and its use may be limited depending on the quality of the drain. It becomes necessary to separately install a filter to prevent the intrusion, which has the disadvantage of complicating the device.

Means for Solving the Problems As a means for solving the above-mentioned problems, the drain discharge device of the present invention has a through hole formed in the bottom of the drain container where internal pressure acts. Insert a plug with separate transparent drain passages and air passages into the drain container.
A float valve is installed that opens and closes an air inlet communicating with the air passage as the float moves up and down, and a valve port is provided outside the drain container in the middle of a drain discharge path that is transparent inside the valve body. A drain valve is provided that opens and closes by moving a valve body engaged with the diaphragm due to the difference between the spring elasticity for biasing the valve to close and the pressure in the diaphragm chamber acting on the diaphragm. An air inflow path for air to flow into the diaphragm chamber and a small diameter orifice for air to flow out of the diaphragm chamber are provided. The configuration was such that they were connected to each other in the passageway.

Functions and Effects of the Invention The present invention has the above-mentioned configuration, and when the drain gradually accumulates in the drain container and the water level rises, the float rises under the buoyancy of the drain, and the air inlet of the float valve opens. When the drain container opens, the air in the drain container passes through the air passage of the stopper, flows into the air inflow path of the drain valve, and flows into the diaphragm chamber.Since the amount of inflow is greater than the amount flowing out from the orifice, the diaphragm chamber is closed. When the pressure gradually increases and the pressure exceeds a certain value, the valve body moves in the valve opening direction against the elasticity of the biasing spring, and the valve opening opens, causing water to flow from the drain passage of the plug body. Drain flowing into the drain discharge path of the drain valve is discharged to the outside through the valve port, and as the drain progresses and the water level of the drain becomes low, the float descends and closes the air inlet, allowing air to flow into the diaphragm chamber. While the inflow stops, the air inside the diaphragm chamber gradually flows out through the orifice, and the pressure inside the diaphragm chamber gradually decreases.During this time, the drain continues to drain, and the pressure inside the diaphragm chamber drops below a certain value. Then, the valve opening of the drain valve closes due to the elasticity of the biasing spring, draining stops, and the drain is collected in the drain container again. By repeating the above operation, the drain in the drain container is kept at an approximately constant level. It is automatically discharged every time the amount is accumulated.

As described above, according to the present invention, only the float valve is installed in the drain container, and the float only moves up and down in the drain, and there is no part that tightly fits and slides. Unlike conventional devices, there is no risk of malfunctions caused by foreign matter in the drain getting caught in the sliding parts, and it can be used without worrying about the quality of the drain, and moreover, reliable operation can be ensured. Furthermore, because the plug body and drain valve are provided with a drain discharge passage, the flow of the passage is reduced compared to the conventional system in which a drainage passage is provided in a small-diameter drain shaft. It is possible to use a large area and realize a device with a large displacement capacity, and since the float valve and drain valve are made separately, if one of them breaks, only the broken one needs to be replaced. It is convenient and economical, and it is also possible to make multiple types of float valves and drain valves with different external dimensions and various capacities, etc., and to select and combine them as appropriate. It has a wide range of effects that can be applied depending on the purpose.

Embodiment Hereinafter, an embodiment of the present invention will be described based on FIG.

In the figure, reference numeral 1 denotes a drain container that stores drain a, which is installed in an air filter that removes drain from high-pressure air supplied to pneumatic equipment, and is connected to a screw hole 2 formed through the bottom of the drain container. , plug body 3
is attached airtightly by screwing the threaded part 4 at the upper end thereof, and this plug body 3 is formed with an air passage 5 extending from an inlet 6 at the center of the upper surface to an outlet 7 opening on the side. A plurality of drain passages 9 are formed around the inlet 6 of the passage 5 and reach an outlet 10 formed on the lower surface, and an air distribution pipe 12 is screwed at its lower end into the inlet 6 of the air passage 5. By doing so, the valve seat body 13 is connected to the drain container 1 so as to protrude into the drain container 1, and a valve seat body 13 with an air inlet 14 formed therethrough is fitted at a position slightly lower than the upper end of this air distribution pipe 12. An elevating body 15 that opens and closes in contact with and separates from the inlet 14 is fitted so as to be able to rise and fall freely, and a float 1 made of a lighter material than the drain a is installed around the air circulation pipe 12.
6 is loosely fitted into the center hole of the float 16 so as to be freely raised and lowered, and is received by a receiving plate 17 fitted in the middle of the air flow pipe 12. The arm 20 is attached to the supporting member 19.
is supported to freely swing, and its tip passes through a vertical groove 21 cut from the upper end of the air distribution pipe 12 to near the upper surface of the air inlet 14, and the elevating body 15
It passes through a diametrical through hole 22 formed in the vertical groove 21 and is further inserted into a transparent support hole 23 on the opposite side of the vertical groove 21, so that the float 16 descends under its own weight and is received by the receiving plate 17. In this state, as shown by the solid line in the figure, the arm 20 assumes a posture with its tip end as a fulcrum and the end on the support member 19 side hanging down diagonally, and the arm 20 touches the lower surface of the through hole 22 of the elevating body 15. By pressing , the elevating body 15 is pressed against the upper surface of the air inlet 14 to close it, and when the float 16 rises due to the buoyancy of the drain a, the end of the arm 20 on the support member 19 side is lifted and the arm 20 is tilted upward to the right,
As shown by the chain line, when the inclination exceeds a certain level, the arm 20 pushes the upper surface of the through hole 22 of the elevating body 15 and lifts the elevating body 15, thereby opening the air inlet 14 and allowing the air inlet 1 to pass through the vertical groove 21.
A float valve 25 is configured to function to introduce air into the tank.

On the other hand, the drain valve 27, which is controlled to open and close in response to the operation of the float valve 25, has a drain discharge passage 29 formed inside the body 28 that extends from an inlet 30 on the upper surface to an outlet 31 on the lower surface. A valve port 32 facing in the horizontal direction is formed on one side of the body 28, and a lid body 3 is provided with a diaphragm 34 in between.
5 is fixed, and its lid body 35 and diaphragm 3
4, a diaphragm chamber 36 is formed which communicates with a connection port 38 formed on the top surface of the lid body 35 via a passage 39, and a coil spring 41
A valve rod 43 protruding from a valve body 42 which is biased to close by an elastic expansion force passes through a bearing cylinder 44 and abuts against an engaging body 45 fitted into a center hole of a diaphragm 34. The valve body 42 is moved by the balance between the pressure inside the diaphragm chamber 36 and the elasticity of the coil spring 41 to open and close the valve port 32. Also, the engaging body 45 fitted into the center hole of the diaphragm 34 is moved. An orifice 46 with a smaller diameter than the air inlet 14 of the float valve 25 is provided in the center, and a cutout groove 47 is formed at the tip of the valve rod 43 to communicate with the orifice 46. An axial slit 48 is cut in the inner periphery of the diaphragm chamber 36, and the diaphragm chamber 36 is communicated with the outlet 31 side of the drain discharge passage 29 through these slits 48. Note that an operation button 50 is attached to the lid 35 of the drain valve 27 for manually pressing the diaphragm 34 in the valve opening direction.

The outlet 10 of the drain passage 9 provided in the stopper 3 is connected to the inlet 30 of the drain discharge passage 29 of the drain valve 27 by a nipple 52, and the connection port 38 communicating with the diaphragm chamber 36 is connected to the inlet 30 of the drain passage 29 of the drain valve 27. , the outlet 7 of the air passage 5 of the plug body 3 is connected by a connecting pipe 53.

This embodiment has such a structure, and before the drain a accumulates in the drain container 1, the float 16 descends and the air inlet 14 of the float valve 25 is opened by the elevating body 15, as shown by the solid line in the figure. While the drain valve 27 is closed, the coil spring 41
The valve body 42 is pressed by the elastic expansion force of the valve body 42 to close the valve port 32. When the drain a drips into the drain container 1 in this state, the drain a closes the drain discharge passage 29 of the drain valve 27. The water accumulates upward from the valve opening 32, then in the nipple 52 and the drain passage 9 of the stopper 3, and then gradually accumulates at the bottom of the drain container 1, and when the water level rises, the float 16 absorbs the buoyancy of the drain a. As described above, the elevating body 15 is lifted by the arm 20 and the air inlet 1 of the float valve 25 is opened.
4 opens, and as a result, the air in the drain container 1 flows through the vertical groove 21 from the air inlet 14 into the air distribution pipe 12, and then drains through the air passage 5 of the stopper 3 and the connecting pipe 53. A portion of the air that flows into the diaphragm chamber 36 of the valve 27 passes through the gap between the operation button 50 and the diaphragm 34, passes through the orifice 46, and enters the drain discharge passage 29.
However, since the amount is small compared to the inflow amount, the pressure in the diaphragm chamber 36 gradually increases, and the pressure in the diaphragm chamber 36 acting on the diaphragm 34 is increased by the coil spring acting on the valve body 42. 41 and the pressure of the drain a, the diaphragm 34 bends and pushes against the valve body 42 via the valve rod 43, as shown by the chain line in the figure.
is pushed in the valve-opening direction to open the valve port 32, whereby the drain a is discharged to the outside from the outlet 31 of the drain discharge path 29. When the water level of the drain a decreases as the water drains progresses, the float 16 descends. As a result, the elevating body 15 closes the air inlet 14 and the flow of air into the diaphragm chamber 36 is stopped.
The air in the diaphragm chamber 36 flows through the orifice 4.
6, and further passes through the notched groove 47 at the tip of the valve rod 43 and the slit 48 in the bearing sleeve 44, and gradually flows out to the outlet 31 side of the drain discharge passage 29, thereby gradually reducing the pressure inside the diaphragm chamber 36. During this period, drain a continues to be drained, and when the pressure inside the diaphragm chamber 36 becomes smaller than the sum of the spring force in the valve closing direction acting on the valve body 42 and the drain pressure, the valve body 42 closes. The port 32 is pressed against the opening 32 to close it, thereby stopping the drainage and storing the drain a again in the drain container 1. By repeating the above operation, the drain a is filled in the drain container 1.
This is automatically discharged every time a substantially constant amount is accumulated.

Note that when the operation button 50 is pressed, the float valve 2
The valve port 32 of the drain valve 27 can be opened regardless of whether the drain valve 5 is opened or closed, which is convenient when the drain a is finally drained.

According to this embodiment, in the drain a, the float 16 loosely fitted into the air circulation pipe 12 only moves up and down, and there is no part that tightly fits and swings. There is no risk of malfunction occurring due to foreign matter biting into the sliding parts, and there is no possibility of malfunctions occurring due to foreign matter biting into the sliding parts.
It can also be applied to the discharge of water, and reliable operation can be ensured.Furthermore, the drainage path of drain a
Since the drain passage 9 of the stopper 3, the nipple 52, and the drain discharge passage 29 of the drain valve 27 can all have a large circulation area, it is possible to realize a device with a large drainage amount, and also the float valve Since the float valve 25 and the drain valve 27 are made separately, if one of them breaks, it is not only economical to replace only the broken one, but also the float valve 25 and the drain valve 27 are made separately. By making a plurality of types with different external dimensions, various capacities, etc., and selecting and combining them as appropriate, it is possible to apply them to a wide range of purposes.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention. a... Drain, 1... Drain container, 2... Screw hole, 3... Plug, 5... Air passage, 9... Drain passage, 12... Air distribution pipe, 14... Air inlet, 15 ...Elevating body, 16...Float, 2
0... Arm, 25... Float valve, 27... Drain valve, 28... Body, 29... Drain discharge path,
31...Outlet, 32...Valve port, 34...Diaphragm, 35...Lid body, 36...Diaphragm chamber,
38... Connection port, 39... Passage, 41... Coil spring, 42... Valve body, 43... Valve rod, 46... Orifice, 52... Nipple, 53... Connection pipe.

Claims (1)

[Scope of utility model registration request] A plug body having separate drain passages and air passages extending from the inside to the outside of the drain container is fitted into a through hole formed in the bottom surface of the drain container where internal pressure acts, and a float is inserted into the drain container. A float valve is provided that opens and closes an air inlet communicating with the air passage as it moves up and down, and a valve port is provided outside the drain container in the middle of a drain discharge path that is transparent inside the valve body. A drain valve is provided which opens and closes by moving a valve body engaged with the diaphragm due to a difference between a spring force for biasing the valve to close and a pressure in the diaphragm chamber acting on the diaphragm. An air inflow path for allowing air to flow into the diaphragm chamber and a small diameter orifice for causing air to flow out of the diaphragm chamber are provided, and the air inflow path of the drain valve is connected to the air passage of the plug body. A drain discharge device characterized in that the drain discharge passages are respectively connected to the drain passages of the plug body.