JPH0443676Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The present invention is a drain trap that automatically discharges condensate generated in compressed air or gas piping systems. Concerning improvements to the float type drain trap.

Float-type drain traps discharge condensate by directly opening and closing a valve port as the float floats up and down.The valve port is extremely small and can only discharge a small amount of condensate. As a result, an oily, highly viscous liquid accumulates,
It adhered to the area around the valve opening and quickly became clogged, causing malfunction.

Prior Art Therefore, a technology such as that shown in Japanese Utility Model Publication No. 49-36747 has been used in the past. this is,
A sliding rod that can be moved forward and backward from the outside is positioned inside the valve opening, and by pushing the sliding rod and making the tip of the sliding rod protrude from the valve opening, oil and dirt attached around the valve opening can be pushed out. This is how it was done.

Problems to be Solved by the Present Invention In this case, the sliding rod must be operated manually, which is time-consuming. Furthermore, since the valve is operated regardless of the condensate level in the valve chamber, there is a problem that air and gas may escape, especially when the condensate level is low.

The technical problem of the invention is therefore to make it possible to clean the valve opening automatically and without escaping air or gas.

Means for Solving the Problems The technical problem of the present invention, which was taken to solve the above technical problem, is to form an inlet, a valve chamber, and an outlet with a valve casing, and to accommodate a float in a free state in the valve chamber. However, in the case where the valve opening provided at the bottom of the valve chamber that communicates the valve chamber and the outlet is opened and closed directly on the outer surface of the float, a sliding rod is placed inside the valve opening and its tip protrudes from the valve opening. Alternatively, a proximity switch may be arranged so that it moves backward, a driving member such as a solenoid or a piezoelectric element that drives the sliding rod may be arranged, and a sensor may be arranged above the float, and the proximity switch may be activated by moving the float toward and away from the sensor. The movement of the sliding rod is controlled by switching and operating the driving member.

Effect The operation of the above technical means is as follows.

When the condensate level is low and the float is descending, move the slide rod back, that is, set it to a position where it does not protrude from the valve opening. When the condensate level rises, the float rises and approaches the sensor of the proximity switch. In response to a command from the proximity switch, a driving member such as a solenoid or a piezoelectric element operates the sliding rod to cause the tip of the sliding rod to protrude from the valve opening. Oil and dirt that has accumulated around the valve opening can be pushed away with the tip of the operating rod. As the condensate level decreases, the float descends and moves away from the proximity switch sensor. The drive member moves the slide rod backward under the command of the proximity switch.
By moving the float toward and away from the sensor, the proximity switch can be switched to automatically operate the drive member to move the slide rod forward or backward. Furthermore, since the tip of the sliding rod protrudes from the valve port when the float floats, that is, when the condensate level is high, no air or gas escapes.

Effect of invention The present invention produces the following specific effects.

By moving the float toward and away from the sensor, the proximity switch can be switched to automatically operate the drive member to move the slide rod forward or backward. Furthermore, since the tip of the sliding rod protrudes from the valve port when the float floats, that is, when the condensate level is high, no air or gas escapes.

Embodiment An embodiment illustrating a specific example of the above technical means will be described (see FIG. 1).

A valve casing is formed by fastening a lid 2 to a main body 1 with bolts (not shown), and a valve chamber 3 is formed inside. An inlet 4 is opened at the upper part of the valve chamber 3. Entrance 4
communicates with the valve chamber 3 via a cylindrical screen 5. An outlet 6 is formed coaxially with the inlet 4. A valve seat 7 is attached to the lower part of the main body 1 by screwing from the valve chamber side. The valve seat 7 is formed with a valve port 9 that communicates the valve chamber 3 with the outlet 6 via a rising passage 8.

A closed spherical float 10 is housed in a valve chamber 3 in a free state. A float seat 11 is formed in the lower part of the valve chamber 3 to determine the lowering position of the float 10.

A holding member 12 is screwed to the side wall of the main body 1 from the outside. A sliding rod 13 is slidably arranged on the holding member 12. The sliding rod 13 is located on the same axis as the valve port 9, and its tip is smaller than the diameter of the valve port 9.
through which it can protrude into the valve chamber 3. A piezoelectric element 14 is connected to the rear end of the sliding rod 13. The piezoelectric element 14 is prevented from coming off by a snap spring 15. A spring 16 is arranged between the stepped portion of the sliding rod 13 and the piezoelectric element 14.

A proximity switch 17 is placed on the lid 2. The proximity switch 17 consists of a controller unit 19 housed in a case 18 and a sensor 21 screwed to a mounting member 20 screwed to the lid 2. The tip of the sensor 21 protrudes into the valve chamber 3 and is located above the float 10. Proximity switch 17 and piezoelectric element 14 are coupled by electrical connections (not shown).

In addition, reference numbers 22, 23, 24 are gaskets,
25 and 26 are O-rings.

The float 10 ascends and descends with the condensate level in the valve chamber 3 to open and close the valve port 9 and automatically discharge the condensate.

When the condensate level is low and the float 10 is sinking, the piezoelectric element 14 and the sliding rod 13 connected to the piezoelectric element 14 move back due to the elastic force of the spring 16, and the valve port 9
It doesn't stand out from the rest. When the condensate level rises, the float 10 rises and approaches the sensor 21 of the proximity switch 17. In response to a command from the proximity switch 17 made up of a controller unit 19 activated by a signal from the sensor 21, the piezoelectric element 14 is displaced in the direction of the valve opening 9 against the elastic force of the spring 16, and the tip of the sliding rod 13 is moved toward the valve opening 9. Make it stand out. Benguchi 9
Oil and dirt adhering to the surrounding area are pushed away by the tip of the operating rod 13. When the condensate level decreases, the float 10 lowers and moves away from the sensor 21 of the proximity switch 17. In response to a command from the proximity switch 17, the piezoelectric element 14 causes the sliding rod 13 to retreat.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a float type drain trap according to an embodiment of the present invention. 1...Main body, 2...Lid, 3...Valve chamber, 4...Inlet, 6...Outlet, 7...Valve seat, 9...Valve port, 10
...Float, 13...Sliding rod, 14...Piezoelectric element, 17...Proximity switch, 21...Sensor.

Claims (1)

[Scope of utility model registration request] The valve casing forms an inlet, a valve chamber, and an outlet, a float is accommodated in the valve chamber in a free state, and a valve port provided at the bottom of the valve chamber that communicates the valve chamber and the outlet is opened and closed directly on the outer surface of the float. In what I did,
A sliding rod is placed inside the valve port so that its tip protrudes or retreats from the valve port, a driving member such as a solenoid or piezoelectric element is placed to drive the sliding rod, and a sensor is placed above the float. A float-type drain trap that is equipped with a switch, and the proximity switch is changed by the float approaching and separating from the sensor, and the driving member is operated to control the advance and retreat of the sliding rod.