JPS5932719B2 - free float trap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a spherical float which floats up and down in accordance with the water level in the condensate reservoir chamber and directly opens and closes the valve hole with its own surface, which is installed in a condensate reservoir chamber communicating with an outlet through an inlet and a valve hole. This invention relates to a free float type trap that automatically discharges condensate generated in a pressurized steam system or pressurized air system.

In a free float type trap, the float itself also serves as a valve body, the operating part is a single part, and the structure is extremely simple and there are few failures.

The free float type trap with the above excellent features is
When the float descends, it must be positioned so that it accurately contacts the valve seat and completely closes the valve hole.

In other words, the float is in an unstable state where it freely displaces within the condensate reservoir chamber, making it difficult to set the contact position with the valve seat, and the extension line from the float seat and the central axis of the valve hole that determine the float's lowering position. If the intersection with the extension line of the float does not coincide with the spherical center of the float, the valve hole will not be completely closed and steam or air will leak from the valve hole.

Therefore, in view of the above-mentioned circumstances, manufacturing of a free-float type trap requires extremely strict dimensional accuracy, making manufacturing difficult.

In view of the above circumstances, it is an object of the present invention to provide a free-float type trap that can correct manufacturing errors and is easy to manufacture.

The technical means of the present invention, which is designed to achieve the above object, is to provide a condensate reservoir chamber that communicates with the outlet through an inlet and a valve hole, and to install a spherical float that rises and falls according to the water level in the condensate reservoir chamber. In a free-flow complete trap that is placed in the condensate storage chamber and opens and closes the valve hole directly on the surface of the float, (a) the valve seat insertion hole drilled in the trap housing is connected to the valve seat insertion hole; A valve seat member having a shape with a small gap formed therebetween is inserted through an annular gasket so that only the gasket portion is in airtight contact with the valve seat insertion hole; (b) An operating member is disposed through the valve housing, and its inner end is connected to the outlet side portion of the valve seat member so that the valve seat member can be tilted at a slight angle.

The present invention will be explained in detail based on an illustrated embodiment.

1 is the main body, and the upper cover 3 is attached with bolts through the gasket 2.
The tightening of nuts or the like is secured by means (not shown) to form the trap housing.

4 is a condensate storage chamber formed inside the trap housing, and an inlet 5
opens through the cylindrical screen 6.

Reference numeral 7 denotes an outlet, which communicates with the lower part of the condensate reservoir chamber 4 through an outlet passage 8 and a valve seat insertion hole 9.

10 is a spherical float arranged in a free state in the condensate reservoir chamber 4, and is an unbalanced float in which a thin hemispherical shell and a thick hemispherical shell are joined and the center of gravity is unevenly distributed, or a synthetic resin is injected into a spherical shape. A molded float or a float made by joining two hemispherical shells and finishing the joint by polishing or the like is used.

Reference numeral 11 denotes a valve seat member inserted into the valve seat insertion hole 9 through the holding plug hole 12, and the side surface 13 corresponding to the insertion hole 9 is formed into a substantially curved surface, and the portion with the O ring 14 interposed therebetween is a valve seat member. It is in a state where it can be rotated.

Reference numeral 16 denotes a valve hole formed by the valve seat member 11, which opens below the condensate reservoir chamber 4 and communicates with the outlet passage 8 through the opening 15.

Reference numeral 17 denotes a plug screwed into the plug hole 12 to support the valve seat member 11 against fluid pressure, and the contact surface 18 with the valve seat member 11 has the portion where the O-ring 14 is placed as a rotation line. It is formed into a curved surface that supports the valve seat member 11 with the same rotation radius.

19 is a disc spring that urges the valve seat member 11 toward the plug 17, and 20 is a gasket.

Further, the valve seat member 11 and the plug 17 are made of a material that is resistant to erosion, and in particular, the contact surface of the valve seat member 11 with the float 10 can be finished with high precision. and penetrates the main body 1 in an airtight manner.

Reference numeral 23 denotes a slit bored at the end of the valve seat member 11, to which the tip of the operating rod 21 is connected by a snap ring 24.

25 is a side chamfer for a tool such as a spanner provided at the rear end of the operating rod 21, 26 is a plug for pressing the backing 22, and 27 is a gasket.

28 is a float seat that determines the lowering position of the float 10.

Here, the disc spring 19 assists the retreating force of the valve seat member 11 when the fluid pressure is low, and is unnecessary when the fluid pressure is high.

Further, the diameter of the valve hole 16 gradually increases in the outflow direction to reduce passage resistance.

Next, the operation of the above embodiment will be explained.

As is well known, in this free float type trap, a float 10 rises and falls in accordance with the water level of condensate that flows into a condensate reservoir chamber 4 from an inlet 5 and accumulates in the condensate reservoir chamber 4.
6 is adjusted to an opening degree appropriate to the amount of condensate flowing by the rising and falling action of the float 10, and a continuous condensate discharge action is obtained.

Here, if the angle at which the valve seat member 11 contacts the float 10 is poor and the valve is in an incompletely closed state, the operating rod 21
The rear end of the valve seat member 11 is rotated from the outside with a tool such as a spanner, and the rear end of the valve seat member 11 is moved up and down, so that the O-ring 14 is disposed in the center and the contact angle with the float 10 can be corrected to an appropriate state.

FIG. 2 shows a sectional view of only the valve seat portion of another embodiment.

However, the parts other than those shown are common to the embodiment shown in FIG.

Reference numeral 31 denotes a valve seat member, which is inserted into the insertion hole 33 from the condensate reservoir chamber 32 side with some play.

Reference numeral 34 denotes an enlarged diameter portion provided at the tip of the valve seat member 31, and the surface facing the inner wall of the main body 35 is formed into a spherical surface.

Reference numeral 36 denotes a zero point interposed between the spherical portion and the inner wall of the main body 35.
1J, the fluid pressure on the condensate reservoir chamber 32 side is used as the tightening force.

37 is a valve hole formed by the valve seat member 31, and the opening 3
8 to the outlet passage 39.

Reference numeral 40 denotes an operating rod which is screwed through the main body 35 in an airtight manner with a backing 41 interposed therebetween, and the tip thereof is connected to the slit 42 of the valve seat member 31.
are connected to each other with a snap ring 43.

44 is a side bevel for a tool such as a spanner provided at the rear end of the operating rod 40, 45 is a plug that presses the backing 41, and 46 is a gasket. The valve seat member 31 is rotated by a tool such as the above, and is spread around the spherical surface of the expanded diameter portion 34 supported by the main body 35 via the O-ring 36 of the valve seat member 31, thereby adjusting the contact angle of the valve seat member 31 with the float 47. can be modified.

In addition, in the embodiment shown in FIGS. 1 and 2 above, the valve seat member 1
I used a screw-type operating member to adjust the angle of 1 and 31, but
The present invention is not limited to this, and other common operating means such as a cam-type operating member may be used.

As described above, according to the present invention, since the contact angle between the valve seat member and the float can be easily changed, poor contact between the valve seat member and the float caused by manufacturing errors can be corrected, and strict O that can provide easy-to-manufacture free-float traps that require dimensional accuracy.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a free float type trap according to one embodiment, and Fig. 2 is a sectional view of main parts of another embodiment. , 5
is an inlet, γ is an outlet, 8 and 39 are outlet passages, 10.47 is a float, 11 and 31 are valve seat members, 16.3γ is a valve hole,
17 is a plug, and 21 and 40 are operating rods.

Claims (1)

[Claims] 1. A condensate reservoir chamber is provided which communicates with the outlet through the valve hole, and a spherical float that rises and falls in accordance with the water level in the condensate reservoir chamber is disposed within the condensate reservoir chamber, and the surface of the float directly connects the valve hole. In a free-float type trap that opens and closes, a valve seat member shaped so as to form a slight space between the valve seat insertion hole and the valve seat insertion hole is inserted into the valve seat insertion hole drilled in the trap housing. The operating member is inserted through the gasket so that only the gasket part is in airtight contact with the valve seat insertion hole, the operating member is placed through the valve housing, and the inner end is inserted into the valve seat insertion hole. A free float type trap connected to the outlet side portion of the valve seat member so as to be tiltable at a slight angle.