JP3233858B2 - Inundation detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inundation detecting device for inspecting the inside of a switch or the like using ultrasonic waves.

[0002]

2. Description of the Related Art Switches and the like that are used outdoors generate rust due to long-term use, and if this progresses, a hole is opened in the outer box, and rainwater may enter through this hole, causing a power failure accident. is there. In order to prevent such accidents,
There is an inundation detection device using ultrasonic waves that can inspect the presence or absence of water inside a switch without energizing a switch installed on a pillar and in an energized state. In this flood detection device, the presence or absence of water inside the switch can be detected by observing the reflected waveform of the ultrasonic wave from the switch side. The water infiltration detection device has a piezoelectric element for transmitting and receiving ultrasonic waves and a holder section including a magnet for bringing the piezoelectric element into close contact with the bottom surface of the switch, an operation rod having a fixed length, and a waveform of the received ultrasonic wave. It comprises a detector including a display for displaying, and a cable for transmitting an electric signal between the piezoelectric element and the detector. In the conventional water immersion detecting device, the holder and the operation rod are integrated, and the cable is connected between the holder and the separately provided detector.

[0003]

However, the conventional inundation detection device has the following disadvantages. Because the above cable was exposed, the cable was easily damaged,
In some cases, disconnection occurred. In addition, when measuring a portion close to the high-voltage charging section, it is necessary to cover the cable with a high-voltage protective coating to prevent an electric shock accident, which requires a complicated operation. Furthermore, it is necessary to adjust the length of the cable by connecting an extension cable according to the environment in which the switch is installed, which is complicated.

Accordingly, the present invention has been made to solve the above-mentioned disadvantages, and it is possible to prevent the cable from being damaged or broken, to eliminate the need to cover the cable with a high-voltage protective coating, and to adjust the length of the cable. It is an object of the present invention to provide a safe and easy-to-use inundation detection device that is unnecessary.

[0005]

According to a first aspect of the present invention, there is provided a piezoelectric element for transmitting and receiving an ultrasonic wave, and a holder including a magnet for bringing the piezoelectric element into close contact with an object to be measured. , input signals the piezoelectric element is detected
Detection function to detect the presence or absence of water
Holder where the holder part is attached to the tip
Operation rod on the unit side, hollow cylinder shape, and the detection function unit
The operating rod on the detection function side and the outer cylinder
One of the operation rods, the other of which is an inner cylinder within the cylinder of the other operation rod
Insert the rod and fix both telescopic operation rods at the desired position.
Operating rod portion comprising a fixing means,
The piezoelectric element and the detection function unit are disposed in an empty cylinder.
And a helical cable for electrical connection.
In order to detect inundation in the device, the operation rod section has two
The operating rod is extended and contracted to a predetermined length and fixed by the fixing means.
Characterized Rukoto allowed to reach the object to be measured in high places in the.

According to a second aspect of the present invention, in the water infiltration detecting device according to the first aspect, the two hollow cylinders of the operation rod portion are provided.
Operation of the shape bars, each flooding detection device comprising a cylindrical der Rukoto.

According to a third aspect of the present invention, in the water infiltration detecting apparatus according to the second aspect , the fixing means is an operation rod which is an outer cylinder.
Ring having a sealing material on the inner wall, located near the hollow opening of
The operation rod of the inner cylinder that is the moving side
When the ring is fixed, between the operation rod of the inner cylinder and the fixing means
The seal material adheres tightly, and the operation rod of the outer cylinder that becomes the fixed side is hollow
While sealing the gap between the opening and the operation rod of the inner cylinder on the moving side
It fixed is characterized by Rukoto.

The invention according to claim 4 is the invention according to claim 2 or 3.
The inundation detection device according to claim 1 , wherein an inner wall of the operation rod of the outer cylinder is provided.
And the outer wall of the operation rod of the inner cylinder.
Protruding part, and the protruding part and the surroundings
The stopper contacts to prevent relative rotation between the operation rods.
It is characterized by stopping .

Therefore, the detection of inundation according to the first and second aspects of the present invention.
According to the device, the telescopic screw is inserted into the telescopic operation rod part.
A helical cable is arranged, and the operation rod
Cable follows and expands and contracts when
Eliminates the security measures required for
Operability has been improved. In addition, the inundation inspection according to claim 3
According to the dispensing device, when the retaining ring fixes the two operation rods,
Sometimes the sealing material adheres to prevent rainwater, etc.
Enables work in the sky and is easy to use without being affected by the weather
Good things. In addition, the inundation detection device according to claim 4
According to the arrangement, the situation where the operation rods that are cylindrical
Avoid cable kink and improve reliability
ing.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the appearance of the embodiment of the present invention. The inundation detection device 1 according to the present embodiment includes:
It comprises a piezoelectric element for transmitting and receiving ultrasonic waves, a holder 2 including a magnet for bringing the piezoelectric element into close contact with the bottom surface of the switch, a telescopic operating rod 3, and a detection function unit 7. As shown in FIG. 1, the present embodiment is characterized in that all of the above components are integrated. In addition,
A cable 8 (see FIG. 2) for transmitting an electric signal between the holder unit 2 and the detection function unit 7 is provided inside the operation rod unit 3.

The holder section 2 includes a cylindrical contact 2a including a piezoelectric element for transmitting and receiving ultrasonic waves and a magnet, and a holder 2b for supporting the contact 2a. The magnet provided on the upper end surface of the contact
This is for bringing a into close contact with the bottom surface of the switch. Further, the contact is supported by a U-shaped holder 2b so that the contact can be measured from an oblique direction with respect to the switch, so that the contact can be rotated.

The detection function unit 7 supplies electric power for generating ultrasonic waves to the piezoelectric element of the holder unit 2 through the cable 8. The piezoelectric element transmits an ultrasonic wave, receives a reflected wave of the ultrasonic wave from inside the switch (not shown), and converts the reflected wave into an electric signal. The electric signal is sent to the detection function unit 7 through the cable 8. The detection function unit 7 processes the electric signal using a CPU, determines whether there is water in the switch, and displays the result on a liquid crystal display unit. If there is inundation, an alarm will sound. The measurement result can be stored in a memory built in the detection function unit 7 together with data such as a pole sign. Since the detection function unit 7 has a built-in battery, it can be used even in a place where there is no power supply.

FIG. 2 is a vertical cross-sectional view of the operation rod portion 3. The first operation rod 4 and the second operation rod 5 are both formed of hollow cylindrical members. In this embodiment, the first operation rod 4 is configured to be slidably housed in a hollow portion of the second operation rod 5 fixed to the detection function unit 7. As a result, the operation rod becomes elastic. The total length of the water intrusion detection device of this embodiment is 1550 mm when the operating rod 3 is maximally extended, and 1200 mm when the operating rod 3 is shortened minimum. The retaining ring 6
This is a part of a fixing means for maintaining the state after adjusting the length of the operation rod by sliding the first operation rod 4 according to the installation location of the switch. The cable 8 is provided in a hollow portion of the first operation rod 4 and the second operation rod 5. Thereby, damage and disconnection of the cable can be prevented.
The cable 8 was formed into a spiral shape as shown in FIG. Thus, the cable 8 can cope with the expansion and contraction of the operation rod 3. Further, by making the operating rod portion 3 of an insulating material, it is not necessary to cover the cable with a high-voltage protective coating. The stopper 9 prevents the first operation rod 4 from dropping off from the second operation rod 5 when the first operation rod 4 is slid to extend the operation rod, and also acts with a rotation stopper 16 described later. Thus, the cable serves to prevent the cable from being twisted due to the expansion and contraction of the operation rod 3.

FIG. 3 is an enlarged longitudinal sectional view of the means for fixing the first operating rod 4 including the above-mentioned retaining ring 6.
Holes are drilled at several positions of the end of the second operation rod 5, the slide guide 11 and the fixing bracket 12, and the pins 10 are fitted therein, thereby fixing the slide guide 11 and the fixing bracket 12 to the second operation rod 5. . The slide guide 11 is a guide for sliding the first operation rod 4, and a cylindrical inner wall surface of the slide guide 11 serves as a sliding surface. Further, it also plays a role of fixing a rotation stopper 16 described later. The fixing bracket 12
It has an external thread on the outer surface of the cylinder and a tapered surface on the inner surface of the cylinder. The retaining ring 6 has a female screw corresponding to the male screw on the inner surface of the cylinder. The retaining ring 6 is fixed to the fixing fitting 12 via the screw.
, The first operating rod 4 is fixed to the second operating rod 5. That is, when the retaining ring 6 is tightened into the fixing fitting 12, the tapered wedge 13 is pushed out in the direction of the fixing fitting 12 by the retaining ring 6, and acts on the fixing fitting 12 via the tapered surface of the tapered wedge 13. The tape rust 13 receives a reaction force from the tapered surface of the fixing bracket, and this force compresses the first operation rod 4 from around the first operation rod 4, causing the first operation rod 4 to be compressed.
The operation rod 4 is fixed. The O-ring 14 provided at a portion where the retaining ring 6 and the first operation rod 4 are in contact with each other is for preventing water from entering the inside of the second operation rod 5. Thereby, the inundation detection device of the present embodiment can be used even in rainy weather.

FIG. 4 is a cross-sectional view of the operation rod section 3, showing a mechanism for preventing the first operation rod 4 from rotating. As described above, after adjusting the length of the operation rod portion 3, it is necessary to fasten the retaining ring 6 to the fixture 12 in order to fix the first operation rod 4. At this time, the first operation rod 4 is rotated, and the twist is accumulated in the cable 8 inside the operation rod portion 3,
The cable may break due to long-term use. When the first operation rod 4 slides, the first operation rod 4 may slide while rotating about an axis. Therefore, the projection 15 is provided on the cylindrical outer wall of the stopper 9, and the rotation stopper 16 is provided on the cylindrical inner wall of the second operation rod 5, thereby preventing the rotation of the first operation rod 4. That is, when the first operating rod 4 rotates, the fixed protrusion 15 at the end of the first operating rod 4 also rotates, but the rotation is stopped by the rotation stopper 16 provided along the inner wall of the second operating rod. Can be stopped. In the embodiment, the first operation rod 4 is
There is a case where the cable rotates about a quarter, but with such a rotation, the cable is not broken.

FIG. 5 is an external view of components of the rotation stopper 16. A method of fixing the rotation stopper 16 will be described. The end of the rotation stop 16 where the hole is opened is fixed to a metal fitting that connects the second operation rod 5 and the detection function unit 7. The other end of the rotation stopper 16 is fixed to the slide guide 11 described in FIG. A key groove is provided in a part of the outer side of the cylinder of the slide guide 11, and the end of the rotation stopper 16 is inserted into the key groove.

[0017]

As described above, according to the first and second aspects of the present invention, since the cable is not exposed to the outside, inconvenience such as disconnection of the cable is eliminated, and the reliability of the water intrusion detecting device is improved. . Also, adjust the length of the operating rod to the DUT.
Since it can be set according to the distance, the operability of the flood detection device is improved.
improves.

According to the invention of claim 3 Symbol placement, to the effect
In addition, there is no danger of water entering the device,
Business becomes possible.

According to the fourth aspect of the present invention, the above-mentioned effect is obtained.
In addition, the cable inside the measuring rod may be damaged due to excessive kinking.
Therefore, the reliability of the immersion detecting device is improved.

Thus, according to the present invention, cable loss
The cable must be covered with a high-voltage protective covering to prevent scratches and disconnections.
No need to adjust the cable length
We can provide a safe and easy to use inundation detection device
You.

The present invention is applicable not only to switches but also to detection of inundation inside housings of various devices.

[Brief description of the drawings]

FIG. 1 is an external view of an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of an operation rod portion.

FIG. 3 is a longitudinal sectional view of a fixing means.

FIG. 4 is a cross-sectional view showing a structure of a rotation stopper.

FIG. 5 is a perspective view showing a part of the rotation stopper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inundation detection apparatus 2 Holder part 2a Contact 2b holder 3 Operation rod part 4 1st operation rod 5 2nd operation rod 6 Stop ring 7 Detection function part 8 Cable 9 Stopper 10 Pin 11 Slide guide 12 Fixture 13 Taper wedge 14 O Ring 15 Projection 16 Detent

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01M 3/04 G01F 23/22 G01M 3/24 G01N 29/26

Claims (4)

(57) [Claims] 1. A test and the holder portion including a magnet for adhering the said piezoelectric element to the piezoelectric element and the object to be measured for transmitting and receiving ultrasonic waves, the presence or absence of flooding by inputting a signal the piezoelectric element is detected
A detection function section, and a holder having a hollow cylindrical shape and the holder
The operation rod on the holder side, which is
Operation stick on the detection function side to which the output function
And an inner cylinder inside the cylinder of one of the operation rods which becomes an outer cylinder.
One of the operation rods is inserted, and both operation rods are
An operation rod portion comprising a fixing means for fixing at a position, and the piezoelectric element disposed in a hollow cylinder of the two operation rods;
Spiral cable for electrically connecting the detection function section and the detection function section
And the operation rod portion for detecting inundation in the device at a high place,
Two operating rods are expanded and contracted to a predetermined length and fixed by the fixing means
Flooding detection device according to claim Rukoto allowed to reach the object to be measured in high places by. In flooding detection device wherein 請 Motomeko 1, wherein said two hollow cylindrical shape operating rod of the operating rod section, it
An inundation detection device characterized in that each is a cylinder . In flooding detection device wherein 請 Motomeko 2, wherein said fixing means arranged in the vicinity of the hollow opening of the operating rod comprising an outer tube
In the case where the retaining ring is an annular retaining ring having a sealing material on the inner wall, and the operating ring of the inner cylinder on the moving side is fixed by the retaining ring
The sealing material adheres tightly between the operation rod of the inner cylinder and the fixing means
Between the hollow opening of the operating rod of the outer cylinder, which is the fixed side, and the movable side.
Flooding detection device characterized that you fixed while sealing a gap between the operating rod in the cylinder that. In flooding detection device 4. 請 Motomeko 2 or claim 3, wherein the anti-rotation provided on the inner wall of the operating rod of the outer cylinder, and a projecting portion provided on an outer wall of the operating rod of the inner cylinder, Wherein the protrusion and the rotation stop come into contact with each other and
A water intrusion detection device, which prevents relative rotation in