JPH05983U - Drain discharge device - Google Patents

Abstract

(57) [Abstract] [Purpose] If the drain is provided by providing a discharge port on the bottom of the air tank, the air tank and the drain discharge device may be damaged.
Also, the position of the air tank becomes higher. In an air compressor including an air compressor 2 driven by a motor 3 on the air tank 1, the air tank 1
The drain pipe 6 having an opening at the lower part is guided to the upper part by approaching the bottom part of the first part, and the drain valve 7 and the solenoid valve 8 are opened to allow the discharge. The solenoid valve 8 is closed by energization (normally open), the motor 3 is rotated at the same time when the switch 11 is turned on, the solenoid valve 8 is closed, the motor 3 is stopped by turning off the switch 11, the solenoid valve 8 is opened, and drain discharge Become.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a device for discharging drain accumulated in the bottom of an air tank of an air compressor. .

[0002]

[Prior art]

  Conventionally, the drain that collects at the bottom of the air tank of an air compressor is the drain at the bottom of the air tank. Provide a discharge port and guide it to the side of the air compressor by piping from the drain discharge port. Generally, a drain trap is provided at the end of the pipe.

[0003]

[Problems to be solved by the device]

  In the case of a portable air compressor, there is a drain trap near the floor, It gets in the way and hits the drain trap against other objects to damage the drain outlet. So Therefore, if a pressure hose is used for the piping, the drain trap is placed on the floor and fixed. Since there is no such thing, the drain trap can be damaged just by changing the place However, it is not preferable because it is dragged by movement. That is, handling It requires special attention. Also, in either case, the drain discharge hole is located at the bottom of the air tank. Therefore, the area around the drain discharge hole is easily corroded and maintenance is not easy. Further outside the air tank Since the drain pipe is installed in the lower part of the air tank and is guided to the drain trap, the position of the air tank must be adjusted. I can't lower it.

[0004]   The present invention lowers the air tank position without the risk of damage to the air tank and drain discharge device. It is an object of the present invention to provide a drain discharge device that can be easily handled.

[0005]

[Means for Solving the Problems]

  A first aspect of the present invention is an air compressor, a motor for driving the air compressor, and an air compressor. Drain of an air compressor having an air tank for storing compressed air discharged from In the discharge device of, the drain pipe approaches the bottom of the air tank and the lower part opens, Drainage, characterized by penetrating through the valve and communicating to the outside through the valve device at the top It is a device.

[0006]   A second aspect of the present invention is an air compressor, a motor for driving the air compressor, and an air compressor. Drain of an air compressor having an air tank for storing compressed air discharged from In the discharge device of, the drain pipe approaches the bottom of the air tank and the lower part opens, Through the solenoid valve to a high place and at least through the solenoid valve to the outside. Control device that closes the valve when the power to the motor is turned on and shuts off the power when the motor is turned on. The drain discharge device is characterized by being provided.

[0007]   The third aspect of the present invention is to connect a drain valve to the solenoid valve on the discharge side of the drain pipe. It is the drain discharge device according to the second aspect of the invention.

[0008]   A fourth invention of the present invention is a control system for opening and closing the solenoid valve for energizing the motor. A second device characterized in that the control device includes a time-limit device for limiting the valve opening time. The drain discharge device described in 1.

[0009]   According to a fifth aspect of the present invention, the valve device is a solenoid valve, and the valve device is provided between the pressure switch and the power supply side. The solenoid valve is opened and closed by the opening and closing operation of the switch for supplying power to the interposed air compressor. The drain discharge device according to the first invention, characterized in that a control device for controlling the It is a place.

[0010]

【Example】

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view. air An air compressor 2 and a motor 3 for driving the air compressor 2 are mounted on the tank 1. The air compressor 2 and the motor 3 are connected by a belt device 4. Air tank 1 is closed The tank is equipped with wheels 5 and the entire air compressor is portable. Pressure to use The compressed air is taken out from an air outlet (not shown) and used. Is the bottom of the air tank 1 The drain pipe 6 having a lower end opened into the air tank 1 at a slight distance from the air tank 1 It penetrates and goes to a high place outside the air tank 1, and is connected to the drain valve 7 and the solenoid valve 8, The outlet of the magnetic valve 8 is guided to a predetermined processing unit via a pipe, for example, a hose.

[0011]   The solenoid valve 8 and the motor 3 are interlocked, and from the power source 9 via a switch (not shown). The pressure switches 11 are wired in parallel. In this case, the solenoid valve 8 is closed It is a type. However, when the solenoid valve 8 is opened by energizing, a switch equipped with a B contact 11, the B contact is wired to the solenoid valve 8. Drain valve 7 passes through the drain However, it is desirable that the compressed air has a function of closing. Used for this The drain valve 7 is a manual on-off valve, or it allows air to pass through in a timed manner at the beginning of operation. Then, it is a valve that acts as a drain trap.

[0012]   When the motor 3 is energized, the air compressor 2 is operated via the belt device 4. Sky The air compressor 2 sucks in the air through the air suction hole 12 and compresses it, and the compressed air is sent to the air tank 1. Discharge. The air in the air tank 1 is taken out from an air outlet (not shown) for use. To be done. The pressure of the air compressed by the air compressor 2 rises. And in the air tank 1 Since it is cooled from the surroundings, saturated water vapor in the air is condensed and becomes liquid, Collect at the bottom. If the air compressor 2 is of the oil lubrication type, the oil will not become fine particles in the compressed air. When mixed with water, it is mixed with the liquefied water. This is the so-called drain It is Air pressure in the normal case where the amount of air used is less than the capacity of the air compressor 2. The operation of the compressor 2 boosts the pressure of the compressed air in the air tank 1, and the air tank 1 is equipped with the compressed air. When the pressure reaches the set pressure of the pressure detector, the switch 11 is turned off. Such air compressor During the operation of 2, the solenoid valve 8 is energized and closed. When the switch 11 is turned off, the motor 3. The air compressor 2 is stopped and the solenoid valve 8 is opened. This allows the drain removal valve The valve 7 becomes operable and the drain pipe 6 is drained by the pressure of the compressed air in the air tank 1. The gas rises and is discharged through the drain valve 7 and the solenoid valve 8. Drain drain When the compressed air is sent, the drain valve 7 shuts off the compressed air and discharges it. Prevent.

[0013]   The drain valve 7 is a stop valve for a manual valve (including a manually operated solenoid valve) Check the condition of the drain, and close the valve so that the compressed air does not blow out excessively. At the end of the work day, the stop valve 7 is left open to reduce the internal pressure of the air tank 1. , And when using a drain trap, connect it between the inlet and outlet of the drain trap By providing a bypass for the pores so that the air in the drain pipe 6 gradually escapes, The rising speed is slowed down so that the drain liquid level in the air tank 1 does not become wavy. This allows When the drain reaches the drain trap, only the drain is discharged and the compressed air blocks the discharge. Be stopped. It should be noted that the pores of the drain trap described above exhaust the air in the drain pipe 6 over time. The loss of compressed air is small because it is only released.

[0014]   In the embodiment, the air tank 1 has a circular cross section and is uniform in the longitudinal direction like a normal air tank. However, in order to make the lower end of the drain pipe 6 a particularly low place, it is necessary to tilt the air tank 1 or Drain drainage should be provided by providing a recessed drainage reservoir at the portion facing the lower end of 6. You may be able to approach completely.

[0015]   In the embodiment, the solenoid valve 8 is arranged on the downstream side of the drain valve 7, but the solenoid valve 8 is drained. It may be arranged on the upstream side of the drain valve 7.

[0016]   FIG. 2 shows another embodiment of the present invention. In the figure, the same parts as those in the previous embodiment are designated by the same reference numerals. Is attached and the description is omitted. This embodiment is a time limiter for limiting the opening / closing time of a solenoid valve. It has a timer. In the figure, if the drain valve 7 is a stop valve Is always open. Solenoid valve 8 is energized open or energized closed, that is, normally closed or normally open A timer 13 is interposed between the switch 11 and the solenoid valve 8. Timer 13 In the case of the function of connecting the solenoid valve 8 from the power supply 9 at all times by connecting the switch 11, The solenoid valve 8 is closed by energization, that is, is normally opened. The timer 13 is opened for the set time. By connecting the switch 13 to the timer 13 In the case of the function of constantly shutting off the power supply 9 and the solenoid valve 8, the solenoid valve 8 is normally closed. , When the switch 11 is turned off, the solenoid valve 8 is energized for the set time and the solenoid valve 8 -13 is opened for the set time. In this embodiment, when the solenoid valve 8 is normally closed It is also possible to omit the drain valve 7.

[0017]   Throughout the examples, it is not necessary to discharge the drain all the time. An empty space to remove the compressed air in the air tank 1 at the end of the day when the air compressor has been used. If it doubles as a vent valve, drainage will be discharged at that time, so in practice drainage A sluice valve is sufficient as the extraction valve.

[0018]   In the embodiment, the drain pipe 6 is a vertical straight pipe, but the lower end of the drain pipe 6 is the bottom of the air tank 1. The drain pipe 6 may be bent and may be installed at an angle. Good.

[0019]   As described above, in each embodiment, the pressure switch provided in the air tank detects the upper limit pressure of the air tank. Stop the operation of the air compressor, detect the lower limit pressure, and start the operation of the air compressor. In an air compressor equipped with a continuous control device, a pressure switch (contacts 11) regarding control. Air compressors are usually In addition to the pressure switch, the switch that connects the air compressor and the power supply is equipped with a pressure switch 1 Prepared on the power supply side rather than 1. Next, FIG. 3 shows an embodiment in which the switch is controlled.

[0020]   The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. The whole is shown by reference numeral 14. The electric power is supplied to the air compressor from the power source 9 via the switch 15, and the intermittent operation is performed. The control is performed by the pressure switch 11. The power receiving side of switch 9 is connected to solenoid valve 8. Has been done. The solenoid valve 8 is energized and closed. When the switch 15 is closed, the solenoid valve 8 is closed, When the switch 15 is turned off, the solenoid valve 8 opens. Therefore, if the switch 15 is turned on at the start of work, The solenoid valve 8 is closed. Also, when closing the switch 15 at the end of work, the solenoid valve 8 opens, so at the end of work Then, the compressed air in the air tank 1 is released, and at the same time, the drain of the air tank 1 is discharged. This By doing so, it is possible to sufficiently deal with drain discharge of a small compressor. the above In the embodiment, the solenoid valve 8 is opened by closing the switch 15, and the solenoid valve 8 is opened by opening the switch 15. It suffices that the magnetic valve 8 be closed, and the control device for the solenoid valve 8 is not limited to the embodiment, and the opening / closing The solenoid valve 8 may be a normally closed solenoid valve using the B contact of the device 15. In addition, the solenoid valve 8 Keep the valve open until the switch 15 is opened at the end of the work day and then closed the next day. It is not always necessary to open the valve continuously at You may just open the valve for a while.

[0021]

[Effect of device]

  The present invention brings the lower end of the drain pipe close to the bottom of the air tank to guide the drain pipe to a high place, Since a drain drain valve was provided at a high place, drain from the bottom of the air tank to the outside immediately. There is no risk of damaging the air tank or drain discharge device like when discharging, Maintenance and inspection of the discharge device is easy, and even when manually operated, the drain valve should be installed at a high place. Easy to handle as it is equipped. Also, close the solenoid valve at the same time as the motor is energized. Therefore, the drain is not discharged while the air compressor is operating, and drain is needed when boosting pressure is required. There is no risk of discharge. The position of the air tank can be lowered.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a vertical sectional view of another embodiment of the present invention.

FIG. 3 is a vertical sectional view of still another embodiment of the present invention.

[Explanation of symbols]

1 air tank 6 drain pipe 7 Drain drain valve 8 solenoid valve 11 switch 13 timer 15 switch

Claims (5)

[Scope of utility model registration request] 1. A drain discharge device for an air compressor of an air compressor, comprising: an air compressor; a motor for driving the air compressor; and an air tank for storing compressed air discharged from the air compressor. The drain discharge device is characterized in that the lower part is opened close to the bottom part, the lower part opens through the air tank, and the upper part communicates with the outside through a valve device. 2. A drain discharge device for an air compressor of an air compressor, comprising: an air compressor; a motor for driving the air compressor; and an air tank for storing compressed air discharged from the air compressor. The lower part is opened close to the bottom of the, and penetrates the air tank to a high place and is communicated to the outside through at least the solenoid valve.The solenoid valve closes when the motor is energized and energizes the motor. A drain discharge device comprising a control device for shutting off and opening the valve. 3. The drain discharge device according to claim 2, wherein the drain valve is connected to the solenoid valve on the discharge side of the drain pipe. 4. The drain discharge device according to claim 2, wherein the control device that opens the solenoid valve while shutting off energization to the motor includes a time limiter that limits the valve opening time. . 5. The valve device is an electromagnetic valve, and a control device for controlling the electromagnetic valve is provided by opening and closing a switch for supplying electric power to an air compressor interposed between a pressure switch and a power source side. The drain discharge device according to claim 1, wherein the drain discharge device is a drain discharge device.