JPH094792A - Free float type steam trap with bypass valve - Google Patents

Abstract

PURPOSE: To provide a free float type steam trap with a bypass valve to prevent occurrence of water hammer at an outlet passage during bypass function and prevent float from damaging. CONSTITUTION: A trap casing comprises a body and a cover 2. The trap casing comprises an inlet 4; a valve chamber 3 communicated from the inlet; an outlet passage 8 communicated from the valve chamber through a valve port 9; and an outlet 5 communicated from the outlet passage. A float 18 to open and close the valve port is arranged in a free state in the valve chamber. A bypass passage 11 to intercommunicate the valve chamber and the outlet passage is formed in a trap casing, and a bypass valve 14 consisting of a ball valve body having a T-shaped opened 13 formed in a confluent part 12 between the bypass passage and the outlet passage is rotatably arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention integrally combines a bypass valve with a free-flow type steam trap that automatically discharges condensed water from a steam piping system using a free-float. Free-flow steam trap with bypass valve This type of trap allows a large amount of condensate to be discharged in a short time or steam or air by opening the bypass valve when a large amount of condensate temporarily occurs or steam or air failure occurs. The obstacle can be eliminated.

[0002]

2. Description of the Related Art An example of a free-flow type steam trap with a bypass valve is disclosed in Japanese Patent Publication No. 6-68355. This forms an inlet in the trap casing, a valve chamber communicating with the inlet, an outlet passage communicating with the valve chamber through the valve opening, and an outlet communicating with the outlet passage, and a flow opening and closing the valve outlet. The valve is arranged in the valve chamber in a free state, a bypass passage communicating the valve chamber and the outlet passage is formed in the trap casing, and a bypass valve for opening and closing the bypass passage is provided.

[0003]

In the above conventional device, when the bypass valve is opened and the fluid on the inlet side is blown to the outlet side, a water hammer is generated in the outlet passage and the float is damaged. There was a problem to do. This is because when the bypass valve is opened, the high temperature fluid on the inlet side suddenly flows to the outlet side and collides with the condensate that is colder than the inlet side that had accumulated in the outlet passage, causing water hammer in the outlet passage. This is because this impact acts on the valve chamber through the valve opening to roll the float.

Therefore, a technical problem of the present invention is to provide a free-flow type steam trap with a bypass valve which prevents damage to the float by preventing water hammer in the outlet passage during the bypass function. It is to be.

[0005]

Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned problems is to provide an inlet to a trap casing, a valve chamber communicating from the inlet, and a valve chamber communicating from the valve chamber via the valve outlet. An outlet passage that communicates with the outlet passage, and a float that opens and closes the valve opening is freely placed in the valve chamber, and a bypass passage that connects the valve chamber and the outlet passage is provided in the trap casing. And a rotatably provided bypass valve for opening and closing the bypass passage.
A bypass valve type free float type steam trap is characterized in that a bypass valve composed of a ball valve body having a V-shaped opening is arranged at a confluence portion of a bypass passage and an outlet passage.

[0006]

In the technical means of the present invention, the bypass valve consisting of the ball valve body having the T-shaped opening is arranged at the confluence of the bypass passage and the outlet passage, so that the bypass valve is rotated. By doing so, the flow path from the bypass passage to the outlet is blocked and the flow path from the outlet passage to the outlet is communicated, and the flow path from the bypass passage to the outlet is communicated and the flow path from the outlet passage to the outlet is blocked. It is possible to switch to the state where Therefore, since the flow passage to the outlet passage is blocked during the bypass function of connecting the passage from the bypass passage to the outlet, water hammer is not generated in the outlet passage, and damage to the float can be prevented.

[0007]

EXAMPLE An example showing a concrete example of the above technical means will be described (see FIG. 1). A lid 2 is fastened to the main body 1 with bolts (not shown) to form a trap casing having a valve chamber 3 therein. An inlet 4 is formed in the upper portion of the main body 1, and an outlet 5 is formed on the same axis as the inlet 4. Inlet 4 has a cylindrical screen
It communicates with the valve chamber 3 via the valve 6. An outlet passage 8 communicating with the outlet 5 is formed beside the valve chamber 3 by a partition wall 7. Partition wall 7
A valve seat member 10 having a valve opening 9 opened at the lower part of
The valve chamber 3 and the outlet passage 8 are communicated with each other via the valve opening 9.

A bypass passage 11 is opened above the partition wall 7 on the same axis as the inlets and outlets 4, 5, and the valve chamber 3 is joined to the outlet passage 8 through the bypass passage 11. At the confluence 12 of the outlet passage 8 and the bypass passage 11, a bypass valve 14 composed of a ball valve body provided with a T-shaped opening 13 is provided with a valve seat member 15, 1.
It is sandwiched between 6 and arranged. The valve seat member 16 is fixed by a holder 17 screwed to the main body 1. A valve shaft (not shown) for rotating operation is connected to the bypass valve 14 on the front side of the drawing by penetrating the main body 1.

By rotating the bypass valve 14 through the valve shaft, the bypass passage 1 is opened by the T-shaped opening 13.
1 to the outlet 5 is blocked and the passage from the outlet passage 8 to the outlet 5 is communicated with the illustrated trap function state, and the outlet from the bypass passage 11 rotated 90 degrees counterclockwise from the illustrated state 5 communicating with the flow path to the outlet 5 from the outlet passage 8
It is possible to switch to a bypass function state in which the flow path to is blocked.

A hollow spherical float 18 made of a stainless steel thin plate is placed in the valve chamber 3 in a free state. Float 1
The valve 8 opens and closes the valve port 9 by ascending and descending according to the water level of the condensed water accumulated in the valve chamber 3, and automatically discharges the condensed water accumulated in the valve chamber 3.

The operation is as follows. Normally, the bypass valve 14 is used by rotating it to the trap function state shown in the figure. That is, the flow path from the bypass passage 11 to the outlet 5 is blocked and the flow path from the outlet passage 8 to the outlet 5 is connected. The float 18 ascends and descends according to the level of the condensate accumulated in the valve chamber 3 to open and close the valve port 9, and the condensate accumulated in the valve chamber 3 is automatically discharged.

If a large amount of condensate is temporarily generated or if steam or air is disturbed, the valve shaft is operated to rotate the bypass valve 14 90 degrees counterclockwise from the illustrated state. Move it to the bypass function state. That is, the flow path from the bypass passage 11 to the outlet 5 is communicated with the flow path from the outlet passage 8 to the outlet 5 is blocked. The fluid on the inlet 4 side is discharged through the bypass valve 14 in a short time. At this time, since the flow path from the bypass passage 11 to the outlet passage 8 is blocked, water hammer does not occur in the outlet passage 8 and damage to the float 18 can be prevented.

[0013]

As described above, according to the present invention, by blocking the flow path to the outlet passage during the bypass function, water hammer is not generated in the outlet passage and damage to the float can be prevented. Free-float style with bypass valve
A mutrap can be provided.

[Brief description of drawings]

FIG. 1 is a free-float type steer with a bypass valve according to the present invention.
It is sectional drawing of the example of a mu trap.

[Explanation of symbols]

 1 Main Body 2 Lid 3 Valve Chamber 4 Inlet 5 Outlet 8 Outlet Passage 9 Valve Port 11 Bypass Passage 12 Merging Section 13 T-Shaped Opening 14 Bypass Valve 18 Float

Claims (1)

[Claims] 1. The trap casing is formed with an inlet, a valve chamber communicating with the inlet, an outlet passage communicating with the valve chamber via the valve opening, and an outlet communicating with the outlet passage to open and close the valve outlet. The float is freely placed in the valve chamber,
Trap the bypass passage that connects the valve chamber and the outlet passage.
A bypass valve formed in the sing and provided with a bypass valve for opening and closing the bypass passage is provided with a bypass valve composed of a ball valve body provided with a T-shaped opening at the confluence of the bypass passage and the outlet passage. Free-flow steam trap with bypass valve.