JPH0454398Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a condensate discharge device for discharging condensate generated in a steam, compressed air, or pressurized gas piping system.

A steam trap is used to exhaust only condensate without escaping steam from the steam system, and an air trap is used to exhaust only condensate without escaping air from the compressed air system, preventing gas from escaping from the pressurized gas system. A gas trap is used to drain only the condensate.

The size and valve opening of these traps must be appropriately selected depending on the amount of condensate or operating pressure. However, a large amount of condensate is generated during startup, and must be quickly discharged to increase the operating rate of the equipment used. Therefore,
Particularly in equipment that operates in batches where operation and shutdown are repeated, a device that can discharge a large amount of condensate corresponding to the high load at startup is required, rather than the amount generated during normal operation.

Prior Art Therefore, conventionally, a condensate discharge device as shown in FIG. 2 has been used. This has a bypass passage 34 provided by communicating the upstream piping 32 and downstream piping 33 of the trap 31, and a manual valve 35 disposed in the bypass passage 34. The trap 31 is selected to have a capacity capable of discharging condensate generated during normal operation.

During normal operation, the manual valve 35 is closed and condensate is automatically discharged by the trap 31, and when a large amount of condensate is generated during startup or the like, the manual valve is opened to quickly discharge the condensate.

Problems to be Solved by the Present Invention In the structure described above, the valve 35 had to be opened and closed manually, which caused a time-consuming problem.

Therefore, the technical problem of the present invention is to enable automatic opening and closing of the valve disposed in the bypass passage.

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problems is to use a float-type trap that opens and closes the valve port with a float placed inside the valve chamber, and a sensor mounted above the float. A proximity switch is installed, and an electrically operated valve is placed in the bypass passage that communicates the upstream and downstream piping of the trap, and the opening and closing of the electrically operated valve is controlled by switching the proximity switch when the float approaches and separates from the sensor. It is something that has been done.

Effects The effects of the above technical means are as follows.
If the amount of condensate generated is small and the float rises and falls slightly, set the electrically operated valve to the closed position. Therefore, during normal operation, condensate is automatically discharged only from the trap by opening and closing the valve port as the float rises and falls.

When the amount of condensate generated is large and the condensate level in the valve chamber rises above the above level, the float rises further and approaches the sensor of the proximity switch. The electrically operated valve is opened by a command from the proximity switch. Therefore, a large amount of condensate at the time of startup etc. is quickly discharged through the trap and bypass passage.

As the condensate level in the valve chamber decreases due to condensate discharge, the float descends and moves away from the proximity switch sensor. The electrically operated valve is closed by a command from the proximity switch.

Therefore, it is possible to automatically switch the proximity switch and open/close the electrically operated valve by moving the float toward and away from the sensor.

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

As described above, according to the present invention, a large amount of condensate generated can be quickly discharged by automatically opening and closing the bypass passage.

In addition, during normal operation, condensate is discharged only by the trap, and the electrically operated valve opens and closes only when a large amount of condensate is generated. Longer valve life.

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

A bypass pipe 4 is provided by connecting the upstream pipe 2 and the downstream pipe 3 of the trap 1, and an electrically operated valve 5 is arranged in the bypass pipe 4.

The casing of the trap 1 is formed by fastening a lid 7 to a main body 6 with bolts (not shown), and a valve chamber 8 is formed inside. An inlet 9 is opened at the upper part of the valve chamber 8. An outlet 11 is formed coaxially with the inlet 9. A valve seat 12 is screwed and attached to the lower part of the main body 6 from the valve chamber 8 side. A valve port 14 is formed in the valve seat 12 to communicate the valve chamber 8 with the outlet 11 via a rising passage 13.

A hermetically sealed spherical float 15 is accommodated in the valve chamber 8 in a free state. A float seat 16 is formed in the lower part of the valve chamber 8 to determine the lowering position of the float 15.

A proximity switch 17 is placed on the lid 7. 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 7. The tip of the sensor 21 protrudes into the valve chamber 8 and is located above the float 15. The proximity switch 17 and the drive section of the electrically operated valve 5 are connected through an electrical connection (not shown).

When the amount of condensate generated is small and the floating of the float 15 is slight, the electrically operated valve 5 is set to the open position. Therefore, during normal operation, condensate is automatically discharged into the downstream piping 3 only through the trap 1 by opening and closing the valve port 14 as the float 15 rises and falls.

When the amount of condensate generated is large and the condensate level in the valve chamber 8 rises above the above level, the float 15 rises further and approaches the sensor 21 of the proximity switch 17. The electrically operated valve 5 is opened by a command from a proximity switch 17 made up of a controller unit 19 which is activated by a signal from the sensor 21. Therefore, a large amount of condensate at startup etc. is automatically and quickly discharged to the downstream piping 3 through the trap 1 and the bypass passage 4.

When the condensate level in the valve chamber decreases due to the discharge of condensate, the float 15 descends and moves away from the sensor 21 of the proximity switch 17. The electrically operated valve 5 is closed by a command from the proximity switch 17.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a condensate discharge device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a conventional condensate discharge device. 1... Trap, 2... Upstream piping, 3... Downstream piping, 4... Bypass passage, 5... Electrically operated valve,
8... Valve chamber, 14... Valve port, 15... Float,
17...Proximity switch, 21...Sensor.

Claims (1)

[Scope of utility model registration request] A float-type trap is used that opens and closes the valve port with a float placed inside the valve chamber, a proximity switch with a sensor is installed above the float, and an electrically operated valve is placed in the bypass passage that communicates the upstream and downstream piping of the trap. A condensate discharge device that controls the opening and closing of an electrically operated valve by switching a proximity switch by moving a float toward and away from a sensor.