JPH0537113Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a flow detection valve that detects that fluid such as water is flowing through piping. The present invention proposes a flow detection valve with a simple structure suitable for notifying the operation of a sprinkler in a simple sprinkler system by means of a water flow in a pipe.

(Prior Art) As a means for detecting the presence or absence of fluid flow in piping, an on-off detection type on-off valve disclosed in, for example, Japanese Unexamined Patent Publication No. 81287/1987 is known.

This on-off valve has a reed switch embedded in a blind plug attached to the bottom of the valve box with a filler such as synthetic resin, and is placed inside the blind plug along with the valve body. An operating rod is loosely inserted into the lower part of the valve body and comes into contact with a spring so that it can move, and a magnet fixed to the lower end of the operating rod is installed inside the guide tube.The valve body is moved by the fluid pressure in the primary chamber. When pushed up and the operating rod and magnet move away from the reed switch, the reed switch is opened and a valve opening signal is output.

(Problem to be solved by the invention) In this on-off valve, the operating rod, spring, magnet, reed switch, and other flow detection mechanism members are assembled from the blind stopper side (primary chamber side) at the bottom of the valve body. ,
Valve mechanism members such as the spring for the valve body are assembled from the upper side of the valve body (secondary chamber side), so the assembly and operation adjustment of the flow detection mechanism and valve mechanism are troublesome. The structure of an on-off valve equipped with a detection mechanism is complicated.

In addition, reed switches are prone to failure due to repeated operation, but since the reed switch of this on-off valve is embedded and internalized in a blind stopper with a filling material such as synthetic resin, it is difficult to replace it. It's a hassle.

Since the magnet is housed within the guide cylinder into which the operating rod is loosely inserted, there is a strong possibility that fluid will leak into the guide cylinder from the loosely inserted portion, and there is a risk that the magnet will rust due to the fluid.

Furthermore, if it is attempted to prevent the magnet from rusting, it is necessary to make the insertion part of the operating rod into the guide cylinder watertight with an O-ring or the like. In this case, the sliding resistance of the operating rod becomes extremely large, and a new problem arises in that the adjustment of the elastic pressure of the spring and, by extension, the operation of the valve body becomes extremely complicated and troublesome.

This invention proposes a flow detection valve that can solve the above-mentioned problems of the conventional technology.The valve mechanism member and the flow detection mechanism member are easy to assemble and adjust, and the structure is simple, and magnets etc. The purpose of the present invention is to provide a flow detection valve designed to eliminate the risk of rust generation.

(Means for solving the problem) In order to solve the above problem, this invention
The valve 8 is separated from the valve seat 7 by the fluid flowing from the inlet side chamber 3 formed in the inlet side chamber 3 to the outlet side chamber 4.
, a cap 13 screwed onto an opening formed opposite to the valve seat 7 in the outflow side chamber 4 of the valve body 2 in order to incorporate the valve 8 and the valve spring 14;
3. The valve spring 14 interposed between the valves 8 and the permanent magnet 20 or ferromagnetic material of the proximity switch S, which is fitted onto the opposite side of the valve seat 7 of the valve 8 and sealed and fixed, are arranged so as not to come into contact with fluid. A permanent magnet 20 is screwed onto the outer part of the cap 13 to accompany the above-mentioned unseating operation of the valve 8.
A switch part 1 of a proximity switch S is provided to perform a switch operation when a ferromagnetic material approaches.
8 is a flow detection valve for sprinkler equipment.

(Function) When the valve 8 is unseated from the valve seat 7 due to the fluid flowing from the inflow side chamber 3 toward the outflow side chamber 4, the permanent magnet 20 or the ferromagnetic material also moves and the switch part 18
, the proximity switch S is activated and the flow of fluid is detected.

Since the permanent magnet 20 or ferromagnetic material for flow detection is attached to the valve 8, the permanent magnet 20 or the ferromagnetic material of the valve 8, the valve spring 14, which are valve mechanism members, and the proximity switch S, which is a flow detection mechanism member, is attached to the valve 8. Both of the ferromagnetic materials can be easily installed through the openings on the same side of the valve body 2, and the operation adjustment operation at the time of installation can also be easily performed from this opening.

By adjusting the screwing amount of the cap 13 used to assemble the valve 8 and the valve spring 14 into the valve body 2, the opening/closing operation of the valve 8 and the operation of the proximity switch S can be adjusted. Adjustment of the mechanism and flow sensing mechanism is extremely easy and does not require a separate and complex structure for these adjustments.

The permanent magnet 20 or the ferromagnetic material is attached to the valve seat 7 of the valve 8.
Since it is fitted and sealed and fixed on the opposite side, it is reliably isolated from the fluid and maintained in a non-contact state, and there is no risk of rust forming on the permanent magnet 20 or the ferromagnetic material.

(Example) Next, an embodiment of this invention will be explained based on the drawings.

FIGS. 1 and 2 show partially vertical front views of the flow detection valve 1 in its respective operating states.

An inflow side pipe 5 and an outflow side pipe 6 are connected to the left and right inflow side chambers 3 and outflow side chambers 4 of the valve body 2 made of non-magnetic material, respectively.
A valve seat 7 is formed on the valve body 2, and a valve portion 8a is brought into close contact with the valve seat 7, and a valve 8 as a movable member M made of a non-magnetic material that can be closed is formed on the valve body 2.
It's decorated.

The central upper part of the valve body 2 is a valve chamber 9 that communicates with the outflow side chamber 4. An opening opening to the outside is provided above the valve chamber 9, and a female thread 10 is formed in this opening. A non-magnetic cap 13 having a female thread 11 and a guide hole 12 is attached to the female thread 10 of the valve body 2 by screwing.

The upper part of the valve 8 is formed with a boss part 8b that is loosely fitted into the guide hole 12, and a hole 8c.
The valve 8 is pressed against the valve seat 7 by the valve spring 14 which is loosely wound. Valve 8 which is a valve mechanism member
Both the valve spring 14 and the valve spring 14 are assembled into the valve body 2 through the opening of the valve body 2.

Attach the adapter 15 made of non-magnetic material to the female thread 11 of the cap 13 by screwing it,
Attach the adapter 1 above the guide hole 12 of the cap 13.
Make sure the bottom of number 5 is visible.

In the flow detection valve 1 configured as described above, when there is no fluid in the inflow side piping 5, the valve 8 is pressed against the valve seat 7 by the valve spring 14 as shown in FIG. When fluid flows through the valve 8, the fluid pushes the valve 8 up against the valve spring 14 and separates the valve seat 7, as shown in FIG.
communicates with the inflow side chamber 3 and fluid flows into the outflow side piping 6. When in such a flowing state, when fluid no longer flows from the inflow side piping 5, the fluid pressure from below the valve 8 increases. , the valve spring 14 and the valve 8's own weight move the valve 8 downward and press it against the valve seat 7. After the pressure is applied, even if fluid remains in the outflow side chamber 4, the valve 8 is moved downward. It is pushed downward and the above-mentioned pressing operation continues, and the check valve function is exhibited.

Then, in order to operate the notification light (not shown) of the flow notification device 16 by the above-mentioned upward movement of the valve 8 as the movable member M, a proximity switch S that closes and closes the notification contact of the flow notification device 16 is activated to detect the flow. It is provided in valve 1.

In the illustrated proximity switch S, the switch part 18 of a reed switch, for example, is attached to the internal thread 17 formed in the adapter 15 without penetrating it to the lower part by screwing, and the switch part 18 is attached to the flow alarm device 1.
6 by wiring 19, a permanent magnet 20 is fitted into the hole 8c of the valve 8, and the permanent magnet 20 is fixed to the valve 8 using a magnetically permeable adhesive 21.

Therefore, when the valve 8 is pressed against the valve seat 7, the permanent magnet 20 is located far from the switch section 18, and the notification contact in the switch section 18 is not closed, causing the valve 8 to rise due to the fluid pressure. When approaching the switch part 18, the lines of magnetic force of the permanent magnet 20 move towards the switch part 1.
8, the notification contact in the switch portion 18 is closed, and as a result, the notification light of the flow notification device 16 lights up to notify that fluid has flowed into the pipes 5 and 6.

When the inflow from the inflow side pipe 5 ceases, the valve spring 14 and the weight of the valve 8 move the valve 8 downward and press it against the valve seat 7, and the permanent magnet 20 moves away from the switch section 18 again. The notification contact of the switch section 18 is opened and the notification light of the flow notification device 16 goes out.

By using a valve spring 14 with low elasticity when the fluid pressure and flow velocity are low, and using a valve spring 14 with high elasticity when the fluid pressure is high, the opening and closing operations of the valve 8 will always be sharp. The flow detection sensitivity can be set higher.

The detection operation by the proximity switch S is performed by the movable member M.
This is done by the relative movement of the valve body 2 with respect to the valve body 2. Therefore, the permanent magnet 20 and the switch part 1
8 does not interfere with the above detection operation whether it is attached to either side of the movable member M or the valve body 2, but as mentioned above, the permanent magnet 20 is attached to the movable member M, and the switch portion 18 does not come into contact with the fluid. Since each was attached to the valve body 2 (cap 13) in the state, the switch part 18
It is extremely convenient for maintaining insulation and preventing pollution, and
Even in the case of high-pressure fluid, there is no fear that the switch section 18 will be fatigued or damaged, and since it is attached to the cap 13, it is convenient to take out the output signal from the switch section 18.

Since the permanent magnet 20 for flow detection is attached to the valve 8, the valve 8 and the valve spring 14, which are valve mechanism members, and the proximity switch S, which is a flow detection mechanism member, are connected to each other.
Either the permanent magnet 20 or the ferromagnetic material can be easily installed through the opening on the same side of the valve body 2.

Since the seating and unseating operations of the valve 8 on the valve seat 7 and the detection operation of the proximity switch S should be linked to each other, the valve 8 is adjusted in accordance with the fluid pressure and flow rate flowing from the inflow side chamber 3 to the outflow side chamber 4. operation adjustment operation, and
The operation adjustment operations of the proximity switch S can all be easily performed from the opening on the same side of the valve body 2.

That is, the opening/closing operation of the valve 8 is adjusted by the valve spring 14.
In addition to replacing the opening of the valve body 2, the operation of the proximity switch S can be adjusted by adjusting the screwing depth of the cap 13 into the female thread 10 of the opening of the valve body 2. This can be done by adjusting the screwing amount of the cap 13 into the female screw 10, and both adjustment operations are extremely easy.

Moreover, the above-mentioned operation adjustment can be made by adjusting the screwing amount of the cap 13 used for assembling the valve 8 and the valve spring 14 into the valve body 2, so there is no need to create a separate complicated structure for these adjustments. do not need.

In the illustrated example above, an embodiment using the permanent magnet 20 as a member for operating the switch portion 18 of the proximity switch S has been described, but depending on the type of the proximity switch S, for example, as the operating member for the switch portion 18, , ferromagnetic materials such as iron can be used.

(Advantages of the Invention) Since the flow detection valve of the sprinkler system according to the invention is constructed as described above, the permanent magnet 20 for flow detection is a ferromagnetic material attached to the valve 8, so that the valve 8 and the valve spring 14, which are valve mechanism members, are prevented from being damaged.
In addition, the permanent magnet 20 or ferromagnetic material of the proximity switch S, which is a flow detection mechanism component, can be easily installed through an opening on the same side of the valve body 2, and the operation adjustment operation during installation can also be easily performed through this opening.

By adjusting the screwing amount of the cap 13 used to assemble the valve 8 and the valve spring 14 into the valve body 2, the opening/closing operation of the valve 8 and the operation of the proximity switch S can be adjusted. Adjustment of the mechanism and flow sensing mechanism is extremely easy and does not require a separate and complex structure for these adjustments.

The permanent magnet 20 or the ferromagnetic material is attached to the valve seat 7 of the valve 8.
Since it is fitted and sealed and fixed on the opposite side, it is reliably isolated from the fluid and maintained in a non-contact state, and there is no risk of rust forming on the permanent magnet 20 or the ferromagnetic material.

[Brief explanation of the drawing]

The figure shows an embodiment of this invention, and FIGS. 1 and 2 are partially vertical front views in respective operating states. 1...Flow detection valve, 2...Valve body, 3...Inflow side chamber, 4...Outflow side chamber, 5, 6...Piping, 7...
Valve seat, 8... Valve, 8a... Valve part, 8b... Boss part, 8c... Hole, 9... Valve chamber, 10, 11, 17
... Female thread, 12 ... Guide hole, 13 ... Cap, 14 ... Valve spring, 15 ... Adapter, 16 ...
...Flow alarm device, 18...Switch section, 19...
Wiring, 20...Permanent magnet, 21...Adhesive, M...
...Movable member, S...Proximity switch.

Claims (1)

[Scope of utility model registration request] The valve 8 is separated from the valve seat 7 by the fluid flowing from the inflow side chamber 3 to the outflow side chamber 4 formed in the valve body 2, and the outflow side chamber 4 of the valve body 2 is used to incorporate the valve 8 and the valve spring 14. A cap 13 is screwed into an opening formed opposite to the valve seat 7 at the valve 8, a valve spring 14 is inserted between the cap 13 and the valve 8, and a valve spring 14 is inserted into the valve 8 on the side opposite to the valve seat 7. The permanent magnet 20 or ferromagnetic material of the proximity switch S is sealed and fixed, and the permanent magnet 20 or ferromagnetic material is screwed onto the outer part of the cap 13 so as not to come into contact with the fluid and is attached to the valve 8 during the above-mentioned unseating operation. A flow detection valve for sprinkler equipment, characterized in that it has a switch portion 18 of a proximity switch S that is provided to perform a switch operation when a body approaches.