JPH02212696A - Float valve - Google Patents

Abstract

PURPOSE:To reduce the frictional resistance when a float is raised to zero and to provide a high valveopening force by means of an increased wedge force by a method wherein a magnet repelling the magnet member of a float is mounted to a contact part between the float and a valve casing or a lever. CONSTITUTION:A float 11 is raised along with a rise in a level in a valve chamber 4, and approaches a lever 13 and a protection cover 18. However, it is prevented from contact therewith through the reaction forces of magnets 3, 16, and 17. Further, when a level is raised, buoyancy of the float is increased, and buoyancy is exerted as a wedge force on the lever 13 without contact of the float with the lever. This constitution enables reduction of frictional resistance to zero and permits utilization of the whole of buoyancy of the float 11, and prevents hooking of the float.

Description

Detailed Description of the Invention Field of the Invention The present invention relates to the structure of a float valve that uses the difference in specific gravity between gas and liquid to drive a valve means with a float to automatically discharge liquid from a gas-liquid mixing system. .

The float valve is used to selectively and automatically discharge liquid from a system in which gas and liquid coexist.

Steam traps automatically discharge condensate generated in steam piping systems, air 1 wraps automatically discharge condensed water generated in compressed air piping systems, etc.

The gas with lower specific gravity is located above the liquid with higher specific gravity. The liquid level moves up and down in response to changes in the quantitative ratio of liquid and gas. The float floats on the liquid surface due to the balance between the buoyant force acting on it and its own weight, and moves up and down with the liquid level. Float valves utilize these natural laws. Gas and liquid are separated in a valve chamber, a valve port is placed at the bottom of the valve chamber, and the valve means is driven by the vertical movement of a float housed in the valve chamber. to open and close the valve port,
It selectively and automatically drains liquid.

Conventional technology A conventional float valve, in which a float drives the valve means to open and close the valve port, has a flow 1- attached to one end of the lever, the other end of the lever is attached to the valve chamber as a fulcrum, and the valve opening is located near the fulcrum. A valve body was installed to open and close the valve. Or, attach a float to one end of the lever (=J), attach a valve element that opens and closes the valve port to the other end of the lever, and place it into the valve chamber using the fulcrum near the valve element. I'll go.

Problems to be Solved by the Present Invention Regarding the above-mentioned problems, in order to maximize the discharge capacity,
In other words, in order to obtain a large opening force to open the valve opening, the float must be made large to increase the buoyancy and self-weight, and the lever must be lengthened to increase the buoyancy and self-weight acting on the valve body. I had to increase the magnification ratio, and I ran into a problem where the image became too large.

In addition, as a mechanism to reduce the discharge capacity, there is a pylon 1 valve mechanism that uses a float valve as a pylon 1 valve to open and close a large main valve port, or the structure is complicated.
There was a problem that malfunctions were likely to occur due to problems such as the valve becoming stuck.

Therefore, the technical problem of the present invention is to increase the discharge capacity by increasing the discharge capacity (J), which is difficult to open by making the float too large or by making the lever long, and to ensure reliable operation by eliminating the binding phenomenon of the valve part. The flow to be done is to obtain a valve.

Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problems is to form an inlet and an outlet of the valve chamber with a valve casing made of a weakly magnetic or paramagnetic material. A hollow float is placed in the valve chamber in a free state, and a magnetic member is installed on the outer surface or inside of the hollow float (G), and a valve body for opening and closing the valve port is attached (S). The lever is attached to the valve chamber so as to be inclined at an acute angle with respect to the displacement of the float in the valve opening direction, and one or more magnets 1 to 1 are attached to the abutting portion of the flow 1- with the valve casing or the lever. The magnet 1 of the float is provided with a member so as to repel each other.

A float placed freely within the working valve chamber moves up and down with the liquid level within the valve chamber. The float, which floats up and is displaced in the valve opening direction, approaches the lever on the inner wall of the valve casing. By providing a magnet 1 at the contact part of the float with the valve casing or lever, which repels the magnetic member of the float, the float and the valve casing or lever can approach each other but cannot come into contact with each other due to magnetic force. do not have. Since the lever is inclined at an acute angle with respect to the displacement of the float in the valve opening direction, the buoyant force of the float is magnified and acts as a wedge J against the lever. Therefore, floats of the same size,
Even if levers of the same length are used, the opening force can be increased.

Either an enlarged draft J acts on the float as a reaction force to the valve opening force, or the abutment area between the float and the valve casing or lever does not come into contact with each other due to magnetic force, so there is no frictional resistance when the float rises. It becomes a mouth.

Effects of the invention By expanding and utilizing buoyancy or self-weight as a wedge force, a large valve opening force can be obtained without making the float too large or lengthening the lever, making the casing smaller. be able to.

In addition, when the float rises, the frictional resistance between the valve casing and the lever becomes zero, and by using all of the float's buoyancy as valve-opening force, an even greater valve-opening force can be obtained. There is no problem, and you can be sure that it will work.

Embodiment An embodiment illustrating a specific example of the above technical means will be described. (
(See Figure 1) This example is applied to a closed float type steam trap.

A lid 2 is fastened to the main body 1 with bolts (f not shown) to form a valve casing having a valve chamber 4 therein.

A gasket 5 is interposed between the main body 1 and M2 to keep them airtight.

An inlet 6 is formed in the upper part of the lid 2, and an outlet lower part is formed in the lower part. The inlet 6 communicates with the upper part of the valve chamber 4 and is connected to steam-using equipment (not shown).
etc. to introduce condensate into the valve chamber 4. A valve seat member 8 is screwed to the lower part of the lid 2, the valve chamber 4 and the outlet lower are communicated through a valve port 9 formed in the valve seat member 8, and condensate in the valve chamber 4 is guided to the outlet lower.

The inlet 6 and the outlet lower are opened in the horizontal direction, and each form a female thread for piping. Airtightness between the valve seat member 8 and the lid 2 is maintained by the nozzles 1 to 10.

A flat, hemispherical magnet j~ is attached to the lower part of the inside of the valve chamber 4 containing a hollow spherical float 11 made of a thin stainless steel plate in a free state. The magnet member 3 may have a ring shape or the like other than the flat plate shape shown in the figure.Also, it may be formed on the outer surface of the float 11.The float 11 floats on the condensate accumulated in the valve chamber 4. , rise and fall with the liquid level.

Attach the lever 13 to the lid 2 with the 12th screw (not shown).
Install it with Attach the valve body 15 that opens and closes the valve port 9 to the lever 13. Therefore, the lever 13 can rotate using the pin 14 as a fulcrum. The upper part of the lever 13 extends diagonally above the float 11 at an angle α from the vertical line, and the upper part is further bent at an angle β.

A flat lever magnet 1 to 1 is placed on the top surface of the lever 13.
6 and the magnets 1 to 6 formed integrally with the lever 13 (=
is attached using the plate 13a. In this case, the magnet part vJ3 of the float 11 and the lever magnet 16 are attached with the same polarity facing each other so as to repel each other. A magnet 17 for the main body is installed opposite to the magnet 17. The magnet 17 is attached via the protective cover 18. Reference number 19 is a rib that guides Flow 1 to 11 in the vertical direction, and is formed in two places in total, including the front side of the paper, and a slight gap is formed between Flow 1 and 11. .

Attach (pull) the bimetal 20 to the lid 2 with the screws 21.

The bimetal 20 has a substantially zero-shaped shape and expands when the temperature is low to exert a nof that can push up the lever 13 to open the valve, and narrows when the temperature is high and changes to a shape that does not engage the lever 13 (the state shown in FIG. 1).

The operation of the steam trap is as follows.

The inlet 6 is connected to a point where condensate is generated, such as in steam-using equipment. Condensate and steam flow into the valve chamber 4, where the condensate is separated and accumulated in the lower part and the steam is separated in the upper part. The float 11 floats up as the liquid level in the valve chamber 4 rises and approaches the lever 13 and the protective cover 18.

However, in this case, there is no contact due to the reaction force of the magnets I~3, 16.17. As the liquid level further rises, the buoyant force of the float increases and acts on the lever] 3 as buoyant force or test force without contact. Therefore, the frictional resistance can be made zero, the floating saw of the float 11 can be fully utilized, and it is also possible to prevent the float from getting caught. This wedge J rotates the lever 13 in the valve opening direction (clockwise in Fig. 1), causing the valve body 15 to open the valve port 9 and discharge the condensate in the valve chamber 4 from the valve port 9 to the lower part. . When the liquid level drops due to discharge, the float 11 descends and the lever 13 rotates in the valve closing direction, causing the valve body 15 to close the valve port 9 and prevent steam from flowing out. This kind of operation is automatically repeated.

In the above embodiment, an example was shown in which two magnets i-17 for the main body and magnet 16 for the lever were used.
If the lever 13 is made of a material with a small coefficient of friction, only the magnets i to 17 for the main body may be used. Furthermore, a magnet similar to the main body magnet 1-17 may be arranged on the rib 19 portion.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a 70-tot type steam trap as an embodiment of the float valve of the present invention. 1: Main body 2: Lid 3: Magnet part vJ4: Valve chamber 6: Inlet 7: Outlet 8: Valve seat member 9: Valve port 11; Float 13 Nilever

Claims (1)

[Claims] 1. Form an inlet, a valve chamber, and an outlet with a weakly magnetic or paramagnetic valve casing, form a valve port that communicates the valve chamber and the outlet, and place a hollow float in the valve chamber in a free state to create a hollow A magnetic member is provided on the outer surface or inside of the float,
A lever with a valve body for opening and closing the valve opening is attached to the valve chamber at an acute angle with respect to the displacement of the float in the valve opening direction, and one or more levers are attached to the valve casing of the float or the contact part with the lever. A float valve in which a magnet is provided so as to repel the magnet member of the float.