JPH059609Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an apparatus for measuring the thickness of an inner coating layer such as a glass lining layer applied to the inner surface of a can of an electric water heater.

[Conventional technology]

Conventionally, it was almost sealed like the can of an electric water heater,
For can bodies with only a small opening, the thickness of the glass lining layer was measured while the can was being manufactured.

For example, in the case of measuring the thickness of the glass lining layer 44 of the can 4 of the electric water heater shown in FIG.
When the glass is in a bell state consisting of a body 41 and a body 41, a measurer enters the bell and measures the thickness of the glass lining layer 44.

[Problem to be solved]

As mentioned above, since the measurer enters the inside of the bell-shaped can body to take measurements, the measurement work is difficult because the operator must take measurements in an awkward position inside the narrow can body.

Furthermore, once the product is completed, even if you want to obtain durability data such as aging of the glass lining layer, you cannot measure it without destroying the can body, making it difficult to collect this data. This required a large amount of expense.

[Means for solving problems]

The present invention was devised to overcome the above-mentioned drawbacks, and provides a measuring device that can measure the thickness of the glass lining layer coated on the inner surface of the can using a small opening in the can. The gist of this is that a thickness sensor is attached to the tip of the distal end of a support rod, one half of which is centered around the bent part and the other half is the distal end, and the flange has an insertion hole. The present invention relates to an apparatus for measuring the thickness of an inner coating layer of a can body, in which a base rod part is inserted into the insertion hole of the can body, and the flange body can be fixed at any position in the longitudinal direction of the base rod part.

〔Example〕

An embodiment of the device for measuring the thickness of the inner coating layer of a can body according to the present invention will be described based on the drawings.

In FIG. 1, reference numeral 4 denotes a can body of an electric water heater or the like which is an object to be measured. The can body 4 is made of a steel plate, and has a cylindrical body part 41 and an arc-shaped body part 41 attached to the upper end part by welding. It consists of an upper mirror plate 42 and an arcuate lower mirror plate 43 attached to its lower end by welding.

Thus, in the bell state consisting of the body 41 and the end plate 42, the glass lining layer 44 is formed on the body 41, and then the end plate 43, on which a glass lining layer 45 is separately formed in advance, is attached. It is.

Further, a hot water supply port 46 is provided approximately at the center of the end plate 42 of the can body 4.

Reference numeral 1 denotes a support rod, in which a substantially right-angled bent portion 13 is formed in the middle of the rod-like body, and with the bent portion 13 as the center, the upright portion is the base rod portion 12, and the horizontal portion is the end rod portion 11.
It is said that

A thickness sensor 2 is attached to the tip of the end rod portion 11, and an insertion hole 33 is inserted into the insertion hole 33 of the flange body 3 provided at the center.

The length of the end stem portion 11 is approximately the same as the inner radius of the can body 4, and the length of the base stem portion 12 is longer than the depth of the can body 4.

In this embodiment, the thickness sensor 2 uses an electromagnetic induction method because the object to be measured is a non-magnetic film on a magnetic metal, but other methods compatible with the object to be measured, such as an electrostatic method or an ultrasonic It goes without saying that it is also possible to use other methods.

The flange body 3 includes a substantially disk-shaped flange portion 31;
A cylindrical boss portion 3 protruding concentrically from the upper side
2, the insertion hole 33 has a flange portion 31
and a boss portion 32 at approximately the center thereof, and a female thread 34 is screwed on the inner surface of the through hole from the outer circumferential surface of the boss portion 32 to the inner circumferential surface of the insertion hole 33. A set bolt 35 is screwed onto 34 to fix the flange body 3 and the base rod portion 12 of the support rod 1.

In addition, 21 is a lead wire for drawing out the data transmitted from the thickness sensor to the outside of the can body.
The tip end thereof is drawn out of the can body 4 through a small hole 36 provided in the flange portion 31 of the flange body 3, and is connected to a display device or the like (not shown).

In order to measure the thickness of the coating layer on the inner surface of a can body using the thickness measuring device for the inner coating layer of a can body constructed in this way, first, the end portion of the support rod 1 to which the thickness sensor 2 is attached is measured. 11 is inserted into the hot water supply port 46 of the can body 4, and when the bent part 13 is inserted, the base rod part 12 is set vertically, and while further inserted, the thickness sensor 2 is inserted into the flange body 3 in advance into the inside of the can body 4. The base rod portion 12 is fixed at the desired depth using the set bolt 35 screwed into the female screw 34 provided on the boss portion 32, and then the flange body 3 is attached to the upper end surface of the hot water supply port 46. When brought into contact, the base part 1 of the support rod 1
2 is suspended approximately at the center of the body 41 of the can body 4, and the detection surface of the thickness sensor 2 attached to the end stem 11 is on the glass lining layer 44 provided on the inner peripheral surface of the can body 4. They come into contact from the vertical direction.

Therefore, the measurer can accurately measure the thickness of the lining layer 44 by slightly moving the flange body 3 relative to the base rod 12 and then fixing it to ensure that the detection surface of the thickness sensor 2 contacts the glass lining layer 44. can be measured.

In this way, by rotating the flange body 3 little by little at a predetermined angle and measuring, it is possible to detect the lining layer 44 provided on the inner surface of the body 41 along a certain cross section of the can body 4 from the outside of the can body. It is extremely easy to measure multiple locations.

Next, another embodiment of the present invention will be explained in detail with reference to FIGS. 2 and 3.

In the bent portion 13 of the support rod 1, the tubular end rod portion 11 and the tubular base rod portion 12 are each cut at a plane approximately 45° with respect to the tube axis, and the leading edge portions 14 and 15 are aligned with each other. It is pivoted on the shaft and is rotatable.

In addition, notch grooves 16 and 17 are provided at the end portions of the end rod portion 11 and the base rod portion 12 facing the bent portion 13 in the tube axis direction on the circumferential surfaces thereof.

An operating rod 5 is inserted into the base rod portion 12, and a male threaded portion 51 is provided at the upper end of the operating rod 5. The male threaded portion 51 is rotatably attached to the upper end of the base rod portion 12. The operating rod 5 is screwed into a female screw section 61 screwed into the center of the operating section 6, and by rotating the operating section 6, the operating rod 5 can be rotated within the base rod section 12. It is designed so that it can be moved in the direction of the tube axis without any movement.

A bifurcated connecting portion 52 is formed at the lower end of the operating rod 5, and guide pieces 53, 53 are provided slightly above it to protrude laterally, and the bifurcated connecting portion 52 has a link bar. 7 are connected, and the guide pieces 53, 53 can slide on guides 19, 19 formed by arranging two protrusions in parallel along the inner surface of the base rod part 12 in the tube axis direction. The other end of the link bar 7 is inserted into the cutout groove 17 of the end member 11 and is rotatably connected to a connecting piece 18 provided on the inner surface thereof.

With this configuration, the support rod 1 can be bent from a substantially straight state to a state in which the end rod portion 11 and the base rod portion 12 are bent at a substantially right angle about the bending portion 13 by rotating the operating portion 6. and conversely, it is possible to restore the bent state to a substantially straight state.

That is, the bent portion 13 of the support rod 1 can be freely bent and operated from the base rod portion 12 side.

Further, as shown in FIG. 3, scale lines 8 are provided on the outer circumferential surface of the base rod portion 12 at approximately equal intervals in the tube axis direction, so that the positioning of the flange body 3 can be facilitated.

〔effect〕

As mentioned above, the device for measuring the thickness of the inner surface coating layer of the can body according to the present invention has one half centered on the bent portion, one half on the end rod portion,
A thickness sensor is attached to the tip of the distal end of the support rod, the other half of which is the base rod, and the base rod is inserted into the insertion hole of the flange body having an insertion hole, and the longitudinal direction of the base rod is Since the flange body can be fixed in any position in any direction, measurements can be easily made from the outside of the can body without the need to crawl inside the can body and take measurements in an unreasonable position. Even if the can body has a rough shape, it can be measured without destroying the can body, so durability data can be collected without unnecessary expense, which can also contribute to quality control. It is.

In addition, if the bent part of the support rod can be operated from the base rod side with a bending mechanism that can be operated to bend or straighten freely, the support rod can be taken in and out of the hot water supply inlet while remaining in a straight line. This makes it easier to take the support rod in and out.

[Brief explanation of drawings]

FIG. 1 is a front cross-sectional view showing one embodiment of the device for measuring the thickness of the inner coating layer of a can body according to the present invention, and also shows how it is used; FIG. 2 is a cross-sectional view of main parts showing another embodiment; FIG. 3 is a side view of the same as above. Explanation of symbols, 1...Support rod, 11...End rod part,
12... Base rod part, 13... Bent part, 2... Thickness sensor, 3... Flange body, 33... Insertion hole, 4
...Can body.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A thickness sensor is attached to the tip of the end rod of a support rod, which has one half as the base rod and the other half as the end rod, centering on the bent portion, and A device for measuring the thickness of an inner surface coating layer of a can body, wherein a base rod portion is inserted into the insertion hole of a flange body having a flange body, and the flange body can be fixed at any position in the longitudinal direction of the base rod portion. 2. The device for measuring the thickness of the inner surface coating layer of a can body according to claim 1, wherein the bent portion of the support rod is operated by a bending mechanism that can be operated to bend or straighten freely from the base rod side.