JPS5813800B2 - automatic drainer - Google Patents

Description

[Detailed Description of the Invention] Condensed water is stored in compressed air pipes and storage tanks, and various types of automatic drainers are used to automatically release it to the outside. With the expansion of the Japanese economy, there has been a demand for unmanned automatic drainers.

However, since condensed water contains a lot of highly viscous oil and debris such as rust, sand, and welding debris, conventional methods often cause malfunctions. In order to do this, it was necessary to periodically disassemble and clean the main body and auxiliary strainer, and there was also the inevitable risk of freezing and cracking in the winter, so complete unmanned operation could not be expected.

The automatic drainer of this invention does not malfunction even when exposed to condensed water containing high viscosity oil and dirt, and there is no fear of freezing and cracking, and it can be expected that there will be no need for long-term maintenance or inspection. be.

Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, 1 is the cover of the container containing the main parts, and 2 is the bottom.

3 is a main valve seat screwed onto the bottom 2, and 4 is a cylinder screwed onto it.

There is a piston 5 inside the cylinder 4, which is inscribed in the cylinder 4 via a ring 6 and is pushed downward by the force of a piston spring 7.The main valve 9 has a main valve rubber 8 glued to its stem. One end of the guide 12 is screwed onto the piston 5 with a nut 11, and the guide 12 is formed as a part of the stem 10.
It can slide up and down in the port 13 of the main valve seat 3, and moves upward together with the piston 5 to open the main valve 9.

The guide 12 has a squeeze hole 14 as shown in FIG.
The main valve 9 also has a small hole 15 and an exhaust hole 16 in the center.

A filter 17 whose mesh opening is much smaller than that of the pores 15 is sandwiched between the piston spring 7 and the cylinder 4, and a stand 18 is screwed onto the cylinder 4.
A float cover 19 is supported.

Further, a pipe 20 is fixed to the cylinder 4, and a nozzle 22 having a small hole 21 is fixed to the upper end of the pipe 20.

23 is an upper float, and 24 is a lower float, both of which are connected at an appropriate interval by a connector 25, and furthermore, a float pipe 26 is bonded to the upper float.

The upper float 23 has a density of about 0.3 or less, and the lower float 2
4 is made of a pressure-resistant, oil- and water-resistant material with a density of approximately 1.
As shown in the figure, the float pipe 26 has a hole 27, a guide holder 28 is fixed to the upper end, and a valve guide 29 is screwed inside the guide holder 28.

30 is a pilot valve, the valve stem 31 of which is guided by a valve guide 29.

32 is a disk-shaped pilot valve rubber adhesively fixed to the lower surface of the pilot valve 30. A valve strainer 33 made of cylindrical wire mesh is adhered to the outer periphery of the pilot valve rubber, and its inner diameter is slightly smaller than the outer diameter of the nozzle 22. In this case, the size of the interval is much smaller than the small holes 21 and 15 of the nozzle 22, and when the valve strainer 33 slides up and down along the outer periphery of the nozzle 22, there is little frictional resistance. Also, the opening of the mesh is much smaller than the small holes 21 and 15, and prevents condensed water from oil and dirt that would clog these holes from entering from inside the outer container.

This inflow of condensed water is almost always possible during normal operation, but can occur in rare cases of abnormal operation, such as when a pressure equalization pipe is closed, so there is no need to clean the valve strainer 33 for a long period of time. It is something.

A valve spring 34 is sandwiched between the pilot valve 30 and the valve guide 29, and the pilot valve 30 is lightly pushed downward to close the small hole 21 with the valve rubber 32. However, a stopper 35 is provided at the upper end of the valve stem 31. The small hole 21 is kept open until the valve guide 29 rises as the upper float 23 rises and reaches the stopper 35, but the upper float 23
The small hole 21 is opened by further rising.

In FIGS. 2 and 3, 36 is a link stand fixed to the float force bar 19, and an arm 37 is fixed to the link stand 36 by an arm pin 38.

The drive link 40 and link 41 to which the drive pin 39 is fixed are fixed at one end by a link pin 42,
The other ends each have a hole, link stand 36 and arm 37.
Although the drive pin 39 is able to slide around the two pins 43 fixed to each pin, the drive pin 39 is stopped by one end surface 44 of the link stand 36, and this sliding angle is relative to the horizontal. The angle is about 30 degrees up and down.

45 is a drive arm whose lower end is fixed to the upper part of the valve guide 29, which has a horizontally elongated hole 46 at the upper part and loosely fits into the drive pin 39, so that the upper float 23, that is, the valve guide 29 descends. At the position where the lower end touches the pilot valve 30, the drive pin 39 is connected to the link stand 36.
When the valve guide 29 is raised by the upper float 23 which is in the stopping position of the end face 44 of away,
At the position where the drive link 40 is beyond horizontal, the upper end of the valve guide 29 touches the stopper 35, and the valve guide 29 further rises to pull up the pilot valve 30, open the latch hole 21, and open the drive link 40. Approximately 30 degrees above the horizontal
It is stopped at an angle of 0.

The arm pin 38 and the link pin 42 are pulled together with an appropriate force by a control spring 47, as shown in FIG.

In Fig. 1, 48 is an inlet, which is connected to the condensed water inflow pipe, and 49 is a pressure equalization pipe, which is a point with the same pressure through which the condensed water passes in order to smoothly inflow the condensed water. Connect to.

50 is a discharge port, which is connected to an atmospheric pressure discharge pipe.

Next, the action will be explained.

When the pressure on the inflow side of condensed water is close to atmospheric pressure, the piston 5 is pushed downward by the force of the piston spring 7, and the main valve 9 is fully open.

In this case, even if condensed water flows in, it does not remain in the vessel and flows out of the vessel through the hole 51, boat 13, squeezing hole 14, and discharge port 50.

The squeezing hole 14 is a few millimeters in size, and there is not much dust that is large enough to clog this hole, but if it does come in, the narrow gap 52 between the float force bar 19 and the cover 1 will prevent it from passing through. Therefore, it is impossible for the squeeze hole 14 to become clogged.

As the air pressure of the condensed water source increases, the pressure inside the vessel also increases, but at this time, the residual condensed water inside the vessel passes through the squeeze hole 14.
All of the air is jetted out, cleaning the inside of the container, and as the pressure inside the container increases, a large pressure difference is created in the squeezing hole 14. On the other hand, the small hole 21 of the nozzle 22 remains closed, and the inside of the piston 5 is Since the pressure inside the upper cylinder 4 is atmospheric pressure through the small hole 15, the piston 5 is pushed from below and pushed up against the force of the piston spring 7, and the main valve 9 is fully opened.

The pressure inside the vessel at this time was 0.8 to 1.0 kg/cm2,
The standard operating pressure of this device is 1 to 21 kg/cA.

Condensed water flows in from the inlet 48, and the water level in the vessel gradually increases.
The buoyant force of the upper float 23 is increased, while the vertical force of the control spring 47 is acting downwardly through the drive pin 39, and for that force, the buoyant force of the upper float 23 minus gravity is In other words, when the upward force increases, the valve guide 29 moves up with the upper float 23, leaving the pilot valve 30 behind, reaches the stopper 35 and lifts up, opening the small hole 21, and at the same time opens the dry link 4.
0, the force of the control spring 47 exceeds the horizontal and reaches the stopping position.

At the same time as the small hole 21 is opened, the compressed air in the container passes through the valve strainer 33, flows from the small hole 21 through the pipe 20, the filter 17, and into the cylinder 4, and then flows into the cylinder 4 through the small hole 1.
5, and flows out from the exhaust hole 16 to the atmospheric pressure outlet 5ro, but since the small hole 21 is much smaller than the small hole 15, the pressure inside the cylinder 4 is close to the pressure inside the vessel. Then,
The pressure inside the cylinder 4 corresponding to the area of the port 13 pushes the piston 5 to fully open the main valve 9, and the condensed water in the vessel flows through the hole 5.
1, through the port 13, the squeeze hole 14 and the drain port 50,
Squirts out of the container.

The jetting force of condensed water increases as the pressure increases, and the water level in the container decreases rapidly.At the same time, the buoyancy of the upper float 23 also decreases, creating a force to pull down the valve guide 29, but when the water level rises When the float 23 falls below the lower surface and reaches the upper surface of the lower float 24, this pulling force, that is, the gravity of the upper float 23 and its accessories excluding the lower float 24, causes the drive ring 40 to reach the upper stopping position. Since the vertical component force of the control spring 47 is not applied, the pilot valve 30 does not descend together with the drive link 40, so the small hole 21 of the nozzle 22 remains fully open, and therefore the main valve 9 is fully opened. However, as the water level approaches the lower surface of the lower float 24, its gravity is applied to the upper float 23, and the total gravity exceeds the vertical component of the control spring 47.
, the upper float 23 and the lower float 24 rapidly descend, and the pilot valve 30 also descends, completely closing the small hole 21.

Compressed air is not supplied into the cylinder 4 due to the small hole 21 being completely empty, but the compressed air is released through the small hole 15, the pressure inside the cylinder 4 becomes atmospheric pressure, and the pressure inside the cylinder acting from the bottom surface of the piston 5 is released. Due to the pressure, the piston 5 rises against the force of the piston spring 7, and the main valve 9 is fully closed.

Therefore, the present invention provides a valve strainer 3 made of cylindrical wire mesh.
The inner diameter of the valve strainer 33 is slightly larger than the outer diameter of the nozzle 22, the size of the gap is much smaller than the small holes 21 and the small holes 15 of the nozzle 22, and the valve strainer 33 extends along the outer circumference of the nozzle 22. When sliding up and down, there is little frictional resistance, and the opening of the mesh is much smaller than the small holes 21 and 15, so oil and dirt that clog those holes will be absorbed by condensed water. This prevents it from entering from within the external organ.

Furthermore, since such an inflow of condensed water is almost possible during normal operation, but may occur in rare cases of abnormal operation, such as when the pressure equalization pipe 49 is closed, the valve strainer 33 should be made long. There is no need for periodic cleaning.

Furthermore, when the pressure on the inflow side of condensed water is close to atmospheric pressure, the piston 5 is pushed downward by the force of the piston spring 7, and the main valve 9 is fully open, so even if condensed water flows in, It flows out of the vessel through the hole 51, the port 13, the squeezing hole 14, and the outlet 50 without remaining in the vessel, but the squeezing hole 14
is a few millimeters in size, so there is not much debris large enough to clog this hole, but if it does come in, it will be stopped from passing through by the narrow gap 52 between the float force bar 19 and the cover 1. , it is impossible for the squeeze hole 14 to become clogged.

In addition, in most conventional automatic drainers, the main valve is closed, so condensed water may not be drained out and may fill up inside the container, leading to the risk of freezing and cracking in the winter. but,
In the present invention, as mentioned above, the main valve 9 is fully opened and condensed water does not remain in the vessel, so there is no need to worry about this.

In addition, in order to provide sufficient force to open the main valve 9 against sliding resistance due to high viscosity oil and dirt, and to ensure reliable operation even at low pressures, the areas of the main valve 9 and port 13 are adjusted appropriately. However, if the squeezing hole 14 is made into a dog shape, not only will the jetting force of condensed water and air be excessive, but also the lower part of the piston 5, which is necessary for fully shutting down the main valve 9 at low pressure, will be reduced. Since it becomes difficult to obtain pressure, the present invention provides a squeezing hole 14 in the guide 12 to overcome this drawback.

Furthermore, the present invention is an upper and lower double flow}23,24,
Since the lower surface of the lower float 24 is near the bottom of the vessel, it takes a short time for the pressure inside the cylinder 4 to fall to atmospheric pressure.
Therefore, it takes a short amount of time to completely shut down the main valve 9, so that the condensed water inside the vessel is completely discharged together with oil and dirt, and a small amount of compressed air is also discharged, so cleaning the inside of the vessel, especially at the bottom, is necessary. is carried out sufficiently.

Both the upper and lower father floats have a suitably wide interval, and water can be drained from the time when the upper float 23 to the lower float 24 comes into play, so a large amount of water can be discharged at one time, and since it can be operated frequently, a large amount of water can be discharged. It is.

The main reason why conventional automatic drainers malfunction is that because the discharge volume is small, highly viscous oil and dirt accumulate and increase friction and resistance on the sliding parts, or they clog the small diameter discharge valve opening. This is because the discharge valve is structured to move by the buoyancy of the float, or with a disc valve type, this effect is large.
This is the biggest cause of malfunction.

In a pilot valve system that relies on the force of a piston, both the force and the discharge port are weak, which may impede the operation of the sliding part or clog the discharge valve.

This is particularly likely to occur during abnormal operation.

In other words, in a no-pressure state, the main drain valve is closed, so if condensed water flows into the vessel, it will overflow into the vessel, float up the float, open the pilot valve, and the condensed water containing highly viscous dirt will flow out. This can lead to clogging of valve pores and exhaust pores.

Furthermore, when the shutoff valve of the condensed water inlet pipe is fully opened, condensed water is rapidly forced into the automatic drainer, overflowing into the container and flowing into the pilot valve, potentially clogging its small holes and exhaust pores.

This could occur even during normal operation, depending on the resistance of the tube.

As is clear from the above description, the automatic drainer of the present invention eliminates and solves all of the causes of malfunctions in the conventional apparatus, and its effects are tremendous.

The upper float 23 is limited in normal pressure depending on its material, especially its density, and the higher the density, the higher the withstand pressure can be achieved.In order to ensure the pressure resistance, the upper float 23 is made with a higher density, as shown in FIG. If the auxiliary spring 53 is provided to supplement the buoyancy, the automatic drainer of the present invention can operate satisfactorily.

The lower float 24 ideally has a density of about 1, but if the density is made larger or smaller than this and the relationship with the upper float is made appropriate, a similarly satisfactory operation can be expected.

Furthermore, one of the main points of the present invention is that in addition to the upper float,
The adjustment device using the control spring 47 shown in the upper part of Figs. 2 and 3 is different from the one used in conventional automatic drainers, in that a lower float is provided close to the bottom of the vessel to create a double float above and below. As shown in FIG. 2, it is possible to substitute a structure using a permanent magnet and a magnetic material to achieve the same operational effect. These are examples of application of the present invention.

[Brief explanation of the drawing]

The figure shows an embodiment of the automatic drainer of the present invention.
The figure is an overall sectional view, Figure 2 is a plan view showing the pilot valve adjustment device, Figure 3 is a longitudinal sectional view showing the pilot valve part and the adjustment device part, and Figure 4 shows the guide squeeze hole of the main valve. The cross-sectional view and FIG. 5 are vertical cross-sectional views showing the case where an auxiliary spring is used for the upper float.

Claims (1)

[Scope of Claims] 1. A container having a condensed water inlet, a pressure equalization pipe connection port, and a drain port, which can be opened and closed by a main drain valve guided by a main valve seat that is a path leading to the drain port, and the main drain valve is a cylinder. The drain main valve, the stem and the piston are connected to the piston in the cylinder via a stem, and the main drain valve, the stem and the piston are provided with an exhaust hole and a fine hole that communicate with the inside of the cylinder, with the fine hole being placed near the inside of the cylinder and communicating with each other as one body. , the piston is constantly pressed downward by a spring, and the lower part of the piston communicates with the inside of the container through a hole;
In addition, a pipe was connected to the cylinder, and a nozzle having a small hole was fixed to the end of the pipe, while an upper float and a lower float close to the bottom of the vessel were connected at appropriate intervals in the container. An upper and lower double float is provided, a float pipe having a hole in the upper part is fixed to the upper float, a nozzle at one end of the pipe is located in the float pipe, and a valve is provided at the end of the float pipe. A guide is provided, a pilot valve is provided to be guided by the valve guide to open and close the nozzle, a valve stem is provided on the pilot valve to protrude upward through the valve guide, and a stopper is fixed to the upper part of the pilot valve. At the same time, the pilot valve is constantly pressed downward by a spring, and an arm is provided protruding from the valve guide.
The automatic drain is constructed by connecting the arm in a freely movable manner to a link provided above the arm and swinging up and down, and the link is provided with an operating body that moves up and down from a horizontal position when an external force is applied to the arm. 2 The outer periphery of the nozzle, which is opened and closed by the pilot valve, slides through a gap smaller than the small hole in the nozzle or the small hole passing through the cylinder, and the size of the mesh is much larger than the small hole or pore. 2. An automatic drain according to claim 1, comprising a small valve strainer. 3. Claims in which the stem of the main drainage valve connected to the piston is provided with a large-diameter guide portion inscribed in the main valve seat, and the guide portion is provided with a squeeze hole that is much smaller in area than the main valve. The automatic drainer described in paragraph 1. 4. The automatic drainer according to claim 1, further comprising a float cover provided above the upper float, with a small gap between the outer peripheral edge of the float cover and the inner wall of the container. 5. The automatic drainer according to claim 1, wherein the operating body provided on the link is a control spring.