JP2900942B2 - Pressure sensor with seismic function - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure sensor with a seismic function that is attached to a gas meter or the like and detects fluid pressure and vibration.

<Prior Art and Problems> Conventionally, for example, a gas meter has a pressure sensor as disclosed in Japanese Utility Model Application Laid-Open No. 63-102139 and
Attached separately to the seismic sensor as disclosed in No. 667, while detecting the gas pressure with the pressure sensor,
The seismic sensor detects an earthquake and closes a shutoff valve of the gas meter.

However, if the pressure detector and the seismic sensor are separately mounted on the gas meter, a large mounting space is required and wiring for mounting is troublesome. In particular, there is also a trouble that the function check of the pressure detecting device and the function check of the seismic sensor must be performed separately in the manufacturing stage.

<Object of the Invention> The present invention has been made in order to solve the above-mentioned problems of the related art, and provides a pressure detecting device which can detect vibration, has excellent mountability, and can shorten a functional check operation time. It is intended to be.

<Structure and Effect of the Invention> A pressure detecting device according to the present invention includes a pressure-receiving element such as a diaphragm that deforms in response to a change in fluid pressure, a pressure-receiving case in which the pressure-receiving element is fixed to an opening at one end, and a pressure-receiving case. A switch case fitted into the other end of the switch case and divided into two chambers by a partition, and a pressure-sensitive device housed in one of the switch cases and opened and closed via a plunger in response to deformation of the pressure-receiving element. A switch mechanism, a seismic switch mechanism that is housed in the other chamber of the switch case, and detects a predetermined vibration, and a pressure-sensitive switch mechanism that is led out in the same direction opposite to the set position of the pressure-receiving element, and a vibration-sensitive switch. An external terminal for extracting each detection output of the switch mechanism and a common terminal thereof are provided.

According to the above configuration, since the pressure-sensitive switch mechanism and the seismic switch mechanism are separated from each other by a partition in the same switch case, and the two mechanisms are housed and fitted to the pressure-receiving case, the pressure sensor with a seismic function is provided. The structure is simple, compact and compact.
The manufacturing and assembling operation is easy, and the mounting space for the gas meter or the like can be reduced to improve the mounting operation efficiency.

Also, since the external terminals for taking out the respective detection outputs of the pressure-sensitive switch mechanism and the seismic switch mechanism and their common terminals are led out in the same direction opposite to the setting position of the pressure-receiving element, wiring work with the outside is easy. is there.

Furthermore, since the pressure-sensitive switch mechanism and the vibration-sensitive switch mechanism are housed in the same switch case, the pressure detection function and the vibration detection function can be checked at the same time in the manufacturing process, and the checking work is efficient and easy. is there.

<Description of Example> Hereinafter, an example of the present invention will be described with reference to the drawings.

1 and 2 are a sectional view and an exploded perspective view, respectively, showing an example of a pressure sensor with a seismic function according to the present invention.

In FIG. 1, reference numeral 1 denotes an apparatus main body, which is a cylindrical pressure receiving case 2 having a mounting flange portion 2a;
And a switch case 3 made of a synthetic resin partially fitted into the switch case. The switch case 3 includes a case body 4 and upper and lower covers 5A and 5B. A metal ring 6 is implanted on the outer periphery of the case main body 4, and the metal ring 6 is fixed to the upper end opening end of the pressure receiving case 2 so that the pressure receiving case 2 and the switch case 3 are connected. ing.

Reference numeral 7 denotes a pressure receiving element fixed to the lower end opening end of the pressure receiving case 2 by the stopper member 8 and deformed by pressure, for example, a diaphragm, and 9 denotes a guide hole formed in the cover 5B.
A plunger is inserted into the shaft 10 so as to be axially movable, and is driven by the diaphragm 7.

Reference numeral 11 denotes a first external terminal fixed to the switch case 3 along the vertical direction, and a movable contact piece 12 driven by the plunger 9 is provided at an inner end thereof. 13
Is a common terminal led out to the switch case 3 in the same direction as the external terminal 11, and the inner end thereof is the movable contact piece.
It is configured as a fixed contact piece 14 that comes into contact with and separates from the fixed contact piece 12. The movable contact piece 12 and the fixed contact piece 14 constitute a pressure-sensitive switch mechanism 15. Reference numeral 16 denotes a through hole formed in the stopper member 8.

Reference numeral 17 denotes a weight disposed in the switch case 3 via the partition wall 18 with respect to the pressure-sensitive switch mechanism 15, and is suspended by a coil spring 19 suspended from the upper cover 5A and can be displaced by vibration. Is set to Reference numeral 20 denotes a movable contact fixed to the lower surface of the weight 19. A fixed contact 21 that is brought into contact with and separated from the movable contact 20 is fixedly provided at the tip of the branch terminal piece 13a that is electrically connected to the common terminal 13. 22 is the above external terminal
A second external terminal led out in the same direction as 11 and is electrically connected to the movable contact 20 via a flexible lead 23. The movable contact 20 and the fixed contact 21 constitute a seismic switch mechanism 24. The pressure-sensitive switch mechanism 15 and the vibration-sensitive switch mechanism 24 are configured as a unit 25 by sharing the switch case 3.

Reference numeral 26 denotes a mounting hole formed in the flange portion 2a of the pressure receiving case 2.

 Next, the operation of the above configuration will be described.

First, if the pressure inside the gas pipe is an appropriate value, the movable contact piece 12 moves away from the fixed contact piece 14 as shown in FIG. The pressure-sensitive switch mechanism 15 is open. Now, when the pressure inside the gas pipe is reduced due to scum leakage or the like, the pressure received by the diaphragm 7 is reduced, and the plunger 9 is displaced downward, so that the movable contact piece 12 contacts the fixed contact piece 14 as shown in FIG. 3b. And the above-mentioned pressure-sensitive switch mechanism
15 is closed, and the pressure drop is detected.

In a calm state without an earthquake, the weight 17 is a coil spring.
The movable contact 20 is suspended from the fixed contact 21 as shown in FIG. 4a. Therefore, the seismic switch mechanism 24 is open. When an earthquake or the like occurs, the vibration is amplified by the coil spring 19, the weight 17 is displaced, the movable contact 20 contacts the fixed contact 21 as shown in FIG. 4b, and the seismic switch mechanism 24 is closed. , An earthquake is detected. Thus, in the above configuration, not only pressure such as gas pressure,
Vibrations such as seismic waves can also be detected.

According to the above configuration, the pressure-sensitive switch mechanism 15 and the seismic switch mechanism 24 are mounted on the same switch case 3 to form the unit 25, so that, for example, the mounting space for mounting on a gas meter or the like can be reduced, and Installation time is reduced by half. Further, since the external terminals 11, 22 and the common terminal 13 are led out in the same direction, wiring work with the outside is also facilitated.

Furthermore, the pressure-sensitive switch mechanism 15 and the vibration-sensitive switch mechanism are used.
Since the unit 24 is a unit, the pressure detection function and the vibration detection function can be simultaneously checked in the manufacturing process, and the check operation is efficient.

[Brief description of the drawings]

1 and 2 are a sectional view and an exploded perspective view, respectively, showing an example of a pressure sensor with a seismic function according to the present invention;
3a and 3b are explanatory diagrams of the operation of the pressure-sensitive switch mechanism in the same sensor, and FIGS. 4a and 4b are explanatory diagrams of the operation of the seismic switch mechanism in the same sensor. 2 ... Pressure receiving case, 3 ... Switch case, 7 ... Pressure receiving element (diaphragm), 9 ... Plunger, 11,22 ...
External terminal, 13 common terminal, 15 pressure-sensitive switch mechanism,
24 …… Sensitivity switch mechanism, 25 …… Unit.

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yasuhide Nishimura 1005 Itsukijo, Kurayoshi City, Tottori Prefecture Inside Kurayoshi Tateishi Electric Co., Ltd. (56) References JP-A-63-208718 (JP, A) JP-A-47- 25667 (JP, A) JP-A-57-69027 (JP, A) JP-A-63-102139 (JP, U) JP-A-59-58320 (JP, U) JP-A-60-15935 (JP, U)

Claims (1)

(57) [Claims] A pressure-receiving element such as a diaphragm which is deformed in response to a change in fluid pressure; a pressure-receiving case in which the pressure-receiving element is fixed at one end; and a partition wall fitted to the other end of the pressure-receiving case; A switch case divided into two chambers,
A pressure-sensitive switch mechanism that is housed in one chamber of the switch case and opens and closes via a plunger in response to deformation of the pressure receiving element, and a sensor that is housed in the other chamber of the switch case and detects predetermined vibration. A seismic switch mechanism, an external terminal led out in the same direction opposite to the setting position of the pressure receiving element to take out each detection output of the pressure-sensitive switch mechanism and the seismic switch mechanism, and a common terminal thereof. Pressure sensor with seismic function.