JPH0670596B2 - Pressure color display and abnormal pressure alarm device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention automatically displays normal pressure, abnormal high pressure, and abnormal low pressure of fluids such as gas, water, oil, etc. in colors, and abnormal high pressure and abnormal pressure. The present invention relates to a pressure color display and abnormal pressure alarm device that can activate an alarm device when the pressure becomes low.

[Conventional technology]

Conventionally, as a fluid pressure display device for displaying a normal pressure, an abnormally high pressure, and an abnormally low pressure of a fluid pressure, as shown in FIG. 13, a flange disposed inside the casing 17 is provided on an end plate 18 at one end of the casing 17. A display shaft 20 having 19 is slidably fitted, an end flange of a bellows 21 inserted into the other end of the casing 17 is fixed to the other end of the casing 17, and the end plate 18 and the flange are fixed. A shaft pressing spring 22 is interposed between the shaft 19 and the display shaft 20, and the display shaft 20 is projected from the casing 17 in proportion to the fluid pressure acting in the bellows 21. A fluid pressure display device is known which is configured to judge whether the fluid pressure is high or low according to the magnitude.

[Problems to be Solved by the Invention]

However, in the case of the conventional fluid pressure display device, since the fluid pressure is judged to be high or low by the amount of protrusion of the display shaft 20 from the casing 17, the normal gas pressure, the abnormally high pressure and the abnormally low pressure are easily detected. In addition, it is not possible to make an accurate determination, and since there is no abnormal pressure warning means, there is a problem of poor safety.

According to the present invention, a normal pressure, an abnormal high pressure and an abnormal low pressure of a fluid pressure can be easily and accurately determined by a change in color, and an alarm can be issued when the abnormal high pressure and the abnormal low pressure occur. An object is to provide a display / abnormal pressure alarm device.

[Means for Solving the Problems]

In order to achieve the above object, in the pressure color display and abnormal pressure alarm device of the present invention, an intermediate portion of an L-shaped lever 2 arranged in a casing 1 is pivotally attached to the casing 1 by a support shaft 3. A pressure receiving member 4 that is deformed by gas pressure is fixed to one end of the casing 1, and acts so as to press the second arm 6 of the lever 2 against the central portion of the pressure receiving member, against the first arm 5 of the lever 2. The pressing spring 7 is engaged with the other end of the casing 1,
A display control member 8 that moves in a direction substantially perpendicular to the first arm 5 in association with the tip end of the first arm 5 is provided, and a slit 9 extending in a direction perpendicular to the moving direction of the display control member 8 is provided. The plate body 10 provided is superposed on the surface of the display control member 8 and fixed to the casing 1, and a normal pressure stop stopper 11 for engaging the intermediate portion of the first arm 5 of the lever 2 with the casing 1. , The stopper mounted on the first arm 5 so as to be movable in a direction substantially at right angles.
A protrusion spring 12 that works to protrude this into the inner surface of the casing 1 is engaged with 11, and an abnormal high-pressure display color 13 exposed on the surface of the display control member 8 in the slit 9 at the time of abnormal high pressure, An abnormal low pressure display color 14 exposed in the slit 9 at abnormal low pressure and a normal pressure display color 15 exposed in the slit 9 at normal pressure are displayed, and a magnet 16 is attached to the display control member 8. An abnormal high pressure alarm reed switch S1 operated by the magnet 16 at abnormal high pressure and an abnormal low pressure alarm reed switch S2 operated by the magnet 16 at abnormal low pressure are attached to the casing 1.

[Action]

When the fluid pressure acting on the pressure receiving member 4 is at an abnormally low pressure, the pressing spring 7 holds the display control member 8 at the abnormally low pressure position via the lever 2, and the slit 9 in the plate 10 has an abnormally low pressure display color. 14 is exposed, the reed switch S2 for abnormal low pressure alarm is operated by the magnet 16, and an alarm device such as a buzzer for abnormal low pressure alarm is activated by the signal of the reed switch S2. When the fluid pressure acting on the pressure receiving member 4 is a normal pressure, the lever 2 is rotated against the force of the pressing spring 7, and the lever 2 moves the display control member 8 to the normal pressure position. Then, the normal pressure display color 15 is exposed in the slit 9 of the plate body 10.

Furthermore, when the fluid pressure acting on the pressure receiving member 4 is abnormally high, the lever 2 is rotated against the force of the pressing spring 7 and the projecting spring 12, and the display control member is operated by the lever 2. 8 is moved to an abnormally high pressure position, and plate 10
The abnormal high voltage display color 13 is exposed in the slit 9 in the and the magnet 16 causes the abnormal high voltage alarm reed switch S1.
Is operated and an alarm device such as a buzzer for abnormal high pressure alarm is activated by the signal of the reed switch S1.

〔Example〕

 The present invention will now be described in detail with reference to the illustrated example.

1 to 12 show an embodiment of the present invention, in which a bent intermediate portion of an L-shaped lever 2 arranged in a casing 1 is pivotally attached to a casing 1 by a support shaft 3. And a cylindrical shape continuously connected to the outer peripheral portion of the diaphragm 23 in the pressure receiving member 4 including a metal plate diaphragm 23 having a large number of concentric circular corrugated portions and a lever operating member 24 fixed to the upper surface of the central portion of the diaphragm 23. The portion is fitted to the outer periphery of one end portion (lower end portion) of the casing 1 and fixed by solder 25, and the cover 26 having a vent hole in the center is arranged outside the pressure receiving member 4 and the casing 1. The lever 2 is fitted and fixed on the outer periphery of one end, and further, on the base end side of the first arm 5 of the lever 2, the lever 2
Of the spring support member 27 engaged with one end of a pressing spring 7 that works to press the second arm 6 on the lever operating member 24, and the other end of the pressing spring 7 is engaged. Is slidably fitted in a square hole 28 provided in the casing 1, and a spring tension adjusting nut 29 engaged with the outer surface of the casing 1 is screwed into a male screw portion of the spring supporting member 27. ing.

A spring engaging arm continuous with the tip of the normal pressure stop stopper 11 is inserted into a through hole 30 provided in the intermediate portion of the first arm 5, and the stopper 11 has a large diameter portion on the proximal end side and a distal end side. The casing 1 is provided with a stepped hole 31 extending in a direction substantially perpendicular to the first arm 5 at a position facing the through hole 30 in the first arm 5, and the stopper 11 is provided. Is slidably fitted in the stepped hole 31, one end of the projecting spring 12 is engaged with a spring engaging arm that is connected to the stopper 11, and the other end of the projecting spring 12 is engaged. The angular shaft portion of the spring supporting member 32 is slidably fitted in the angular hole 33 provided in the casing 1, and the male screw portion of the spring supporting member 32 is engaged with the outer surface of the casing 1. The tension adjustment nut 34 is screwed,
The stopper 11 is pulled by the tension of the protrusion spring 12, the step portion of the stopper 11 is engaged with the step portion of the stepped hole 31, and the tip end portion of the stopper 11 extends from the inner surface of the casing 1 to the first portion. It is projected toward the arm 5.

A protrusion 36 extending in a direction substantially perpendicular to the first arm 5 is integrally provided on the back surface of the plate body 35 to form the display control member 8 and is provided at the other end (upper end) of the casing 1. The plate body 35 of the display control member 8 is placed in the first horizontal concave portion.
The ridge 36 is movably fitted to the arm 5 in a direction substantially perpendicular to the arm 5, the ridge 36 of the display control member 8 is inserted into a slit provided in the bottom of the recess, and the ridge 36 is formed.
A large-diameter hole 37 extending in the moving direction of the display member and the large-diameter hole
Small-diameter hole 38 that penetrates from the bottom of 37 toward the first arm 5
And are provided.

The magnet pressing shaft 39, which has a large-diameter head at the base end,
While slidably fitted in the small diameter hole 38, the large diameter head is arranged in the large diameter hole 37, and in the large diameter hole 37,
A magnet pressing spring 40 composed of a magnet 16 and a spiral spring is sequentially inserted, a cap 41 is screwed and fixed, and the cap 41 and a support pin 42 fixed to the casing 1 are connected via a tension spring 43. The large-diameter hole 37 allows the magnet 16 to be pressed through the magnet 16.
39 is pressed, the tip of the magnet pressing shaft 39 projects from the end of the ridge 36, and an engaging member 44 facing the magnet pressing shaft 39 is integrally provided at the end of the display control member 8. Has been.

The tip of the first arm 5 is arranged between the tip of the magnet pressing shaft 39 and the engaging member 44, and the casing 1 has an adjusting stopper at a position facing the engaging member 44.
45 is screwed, and further, an adjustment stopper 46 facing the end of the display control member 8 is screwed to the casing 1 on the side opposite to the engaging member 44. Further, in the casing 1, an abnormal high pressure alarm reed switch S1 operated by the magnet 16 when the fluid pressure acting on the pressure receiving member 4 is abnormally high, and a magnet when the fluid pressure acting on the pressure receiving member 4 is abnormally low. The abnormal low pressure alarm reed switch S2 operated by 16 and the ultra abnormal low pressure alarm reed switch S3 operated by the magnet 16 when the fluid pressure acting on the pressure receiving member 4 is the ultra abnormal low pressure are fixed, and the magnet 16 The display control member 8 supporting the magnet pressing shaft 39 is moved by the rotation of the first arm 5.

A plurality of slits 9 extending in a direction perpendicular to the moving direction of the display control member 8 are formed on the opaque plate body 10 fixed to the casing 1 by being superposed on the surface of the display control member 8. Direction, and the slit 9 is provided on the surface of the display control member 8 at an abnormally high pressure.
An abnormal high pressure display color 13 exposed inside, an abnormal low pressure display color 14 exposed inside the slit 9 when abnormal low pressure, and a normal pressure display color 15 exposed inside the slit 9 at normal pressure are displayed. Further, a transparent cover 47 for covering the plate body 10 is fixed to the casing 1.

In order to make the movement amount of the display control member 8 larger than the movement amount of the lever operation member 24, the distance between the contact portion of the first arm 5, the magnet pressing shaft 39, and the engaging member 44 and the support shaft 3 is The distance is set larger than the distance between the support shaft 3 and the contact portion between the two arms 6 and the lever operation member 24. For example, red is used as the abnormal high pressure display color 13, white is used as the abnormal low pressure display color 14, and green is used as the normal pressure display color 15. Further, the casing 1 of the pressure color display / abnormal pressure alarm device configured as described above is hermetically fitted and fixed to the gas pressure action opening of the gas equipment.

In the pressure color display / abnormal pressure alarm device of the above-described embodiment, when the fluid pressure acting on the pressure receiving member 4 gradually rises, the pressure receiving member 4 generates a lever pushing force proportional to the fluid pressure to cause the lever 2 to move. Attempt to push up the second arm 6. However, since the pressing spring 7 causes the lever 2 to rotate in the direction in which the lever operating member 24 is pushed down by the second arm 6, when the fluid pressure acting on the pressure receiving member 4 is an abnormally low pressure, As shown in the drawing, the display control member 8 is pulled by the tension spring 43 and pressed against the low pressure stopper 46, and the magnet 16 operates the abnormal low pressure alarm reed switch S2. The abnormal low-pressure alarm device such as a buzzer for abnormal low-pressure alarm is activated by this signal, and the abnormal low-pressure display color 14 is exposed in the slit 9 of the plate 10 as shown in FIG.

When the fluid pressure acting on the pressure receiving member 4 is further reduced to an abnormally low pressure, the first arm 5 causes the magnet pressing shaft 39 to move.
The magnet 16 is moved through the magnet 16 and the magnet 16 operates the reed switch S3 for ultra-abnormal low-voltage alarm. The alarm is activated.

The fluid pressure acting on the pressure receiving member 4 increases, and the counterclockwise rotation force of the lever 2 by the pressure receiving member 4 causes the pressing spring 7 to move.
When it becomes larger than the clockwise rotation power of the lever 2 due to
The lever 2 is rotated counterclockwise by the pressure receiving member 4, and the first arm 5 of the lever 2 abuts against the tip surface of the stopper 11. However, since the stopper 11 is held at the position protruding into the casing 1 by the protruding spring 12, when the gas pressure acting on the pressure receiving member 4 is a normal pressure, as shown in FIG. In a state in which 5 abuts on the tip surface of the stopper 11, the counterclockwise rotation of the lever 2 is stopped, and the display control member 8 is moved to the normal pressure position by the first arm 5 and the position is maintained. As shown in FIG. 10, the normal pressure display color 15 is exposed in the slit 9 of the plate 10.

When the fluid pressure acting on the pressure receiving member 4 rises to an abnormally high pressure, the lever 2 moves counterclockwise by the pressure receiving member 4 against the force of the pressing spring 7 and the projecting spring 12, as shown in FIG. When the first arm 5 pushes the stopper 11 to move the first arm 5 into engagement with the engaging member 44, the first arm 5 causes the display control member 8 to have an abnormally high voltage. The display control member 8 is moved to the position, the engaging member 44 abuts against the adjusting stopper 45, and the display control member 8 is held at that position. As shown in FIG. Is exposed, and the magnet 16 operates the reed switch S1 for abnormal high pressure alarm, and the signal of the reed switch S2 for abnormal low pressure alarm activates an abnormal high pressure alarm device such as a buzzer for abnormal high pressure alarm.

Further, when the fluid pressure acting on the pressure receiving member 4 decreases, the operation opposite to the case of increasing the fluid pressure is performed.

FIG. 12 shows the relationship between the fluid pressure acting on the pressure receiving member 4 and the movement amount of the display control member 8. Further, the display control member 8 is moved stepwise at an arbitrary fluid pressure by adjusting the tension of the pressing spring 7 by the spring tension adjusting nut 29 and adjusting the tension of the protruding spring 12 by the spring tension adjusting nut 34. be able to.

When carrying out the present invention, as the pressure receiving member 4, a cylindrical metal bellows with closed ends may be used. Further, a flange having a through hole for screw insertion may be continuously provided on the casing 1, and the pressure color display / abnormal pressure alarm device may be fixed to the gas equipment by the screw inserted through the through hole. Furthermore, as the abnormal high pressure alarm device, the abnormal low pressure alarm device, and the ultra-abnormal low pressure alarm device, a combination of an alarm buzzer and an alarm light may be used.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

When the fluid pressure acting on the pressure receiving member 4 is an abnormally low pressure, the pressing spring 7 holds the display control member 8 at the abnormally low pressure position via the lever 2, and the slit 9 in the plate body 10 displays the abnormally low pressure. Since the color 14 is exposed and the reed switch S2 for abnormal low pressure alarm is operated by the magnet 16 provided in the display control member 8, the abnormal low pressure can be displayed in color and an alarm can be issued. Further, when the fluid pressure acting on the pressure receiving member 4 is an abnormally high pressure,
The lever 2 resists the force of the pressing spring 7 and the protruding spring 12.
When the lever is rotated, the display control member 8 is moved to the abnormal high pressure position by the lever 2, the abnormal high pressure display color 13 is exposed in the slit 9 of the plate body 10, and the display control member 8 is provided. Since the magnet 16 operates the reed switch S1 for abnormal high pressure alarm, the abnormal high pressure can be displayed in color and an alarm can be issued, and when the gas pressure acting on the pressure receiving member 4 is a normal pressure, it is pressed. While the lever 2 is rotated against the force of the spring 7,
The lever 2 moves the display control member 8 to the normal pressure position, and the normal pressure display color is displayed in the slit 9 of the plate 10.
Since 15 is exposed, the color corresponding to the abnormal high pressure, the normal pressure, and the abnormal low pressure of the gas pressure is exposed in the slit 9 of the plate body 10 by a simple means, and the gas pressure can be easily confirmed by the color. At the same time, an alarm can be issued at abnormally high pressure and abnormally low pressure, so that safety can be improved.

[Brief description of drawings]

1 to 12 show an embodiment of the present invention. FIG. 1 is a vertical sectional side view showing a state of a pressure color display and an abnormal pressure alarm device at a normal pressure, and FIG. 1 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a sectional view taken along the line BB of FIG. 2,
FIG. 4 is a vertical sectional side view showing the state of the pressure color display / abnormal pressure alarm device at an abnormally low pressure, and FIG. 5 is a vertical side view showing the state of the pressure color display / abnormal pressure alarm device at an extremely abnormal low pressure. FIG. 6 is a vertical cross-sectional side view showing the state of the pressure color display and abnormal pressure alarm device at an abnormally high pressure, FIG. 7 is a plan view of a plate body having slits, FIG. 8 is a plan view of a display plate having color display, 9 to 11 are vertical side views showing the positional relationship between the color display on the display plate and the slits of the plate body. FIG. 12 is a diagram showing the relationship between the gas pressure acting on the pressure receiving member and the amount of movement of the display. FIG. 13 is a vertical sectional side view showing a conventional gas pressure display device. In the figure, 1 is a casing, 2 is a lever, 3 is a spindle,
4 is a pressure receiving member, 5 is a first arm, 6 is a second arm, 7 is a pressing spring, 8 is a display plate, 9 is a slit, 10 is a plate, 11
Is a stopper for stopping normal pressure, 12 is a spring for protrusion, 13 is an abnormal high pressure display color, 14 is an abnormal low pressure display color, 15 is a normal pressure display color, 23
Is a metal plate diaphragm, 24 is a lever operating member, 26 is a cover, 27 is a spring supporting member, 29 is a spring tension adjusting nut,
31 is a stepped hole, 32 is a spring support member, 34 is a spring tension adjusting nut, 39 is a magnet pressing shaft, 40 is a magnet pressing spring, 41 is a cap, 42 is a support pin, 43 is a tension spring, and 44 is an engagement. Members 45 and 46 are adjusting stoppers, S1 is an abnormal high voltage alarm reed switch, S2 is an abnormal low pressure alarm reed switch, and S3 is a super abnormal low pressure alarm reed switch.

Claims (1)

[Claims] 1. An L-shaped lever 2 arranged in a casing 1 has an intermediate portion pivotally attached to the casing 1 by a support shaft 3, and a pressure receiving member 4 which is deformed by gas pressure at one end of the casing 1. Is fixed, a pressing spring 7 that works to press the second arm 6 of the lever 2 to the central portion of the pressure receiving member is engaged with the first arm 5 of the lever 2, and the other end of the casing 1 is A display control member 8 that is moved in a direction substantially perpendicular to the first arm 5 in association with the tip of the first arm 5 is provided, and a slit 9 extending in a direction perpendicular to the movement direction of the display control member 8. The plate body 10 having the above is superposed on the surface of the display control member 8 and fixed to the casing 1. The normal pressure stop stopper 11 for engaging the casing 1 with the intermediate portion of the first arm 5 of the lever 2. But that Of the display control member 8 is attached to the first arm 5 of the display control member 8 so as to be movable in a direction substantially perpendicular thereto, and the stopper 11 is engaged with a projecting spring 12 which works to project the stopper 11 to the inner surface of the casing 1. , An abnormal high pressure display color 13 exposed in the slit 9 at an abnormally high pressure, and an abnormal low pressure display color exposed in the slit 9 at an abnormal low pressure
14 and a normal pressure display color 15 exposed in the slit 9 at a normal pressure are displayed, a magnet 16 is attached to the display control member 8, and the casing 1 is operated by the magnet 16 at an abnormally high pressure. A pressure color display and abnormal pressure alarm device in which an abnormal high pressure alarm reed switch S1 and an abnormal low pressure alarm reed switch S2 operated by the magnet 16 at abnormal low pressure are attached.