JPH0340452Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a thermocouple attachment device used for attaching a temperature measuring junction of a thermocouple to the surface of a moving hot slab during continuous casting.

[Conventional technology]

Attaching thermocouples to the surface of the slab to measure the changes in surface temperature as it moves, and thereby appropriately controlling the operating conditions of continuous casting, will reduce the stress that occurs when the slab is bent to a horizontal position. This is important in order to prevent the occurrence of cracks and breakouts in slabs and to stably produce high-quality slabs.

By the way, in order to attach a thermocouple to a cast slab, for example, as disclosed in Japanese Patent Laid-Open No. 58-96228, a washer fixed to the temperature measuring junction of the thermocouple is moved forward by a piston using the explosive force of gunpowder. A thermocouple mounting device with a
There is a known method that abuts against a moving slab and instantaneously places it by the propulsive force generated by the explosion of the gunpowder.

[The problem that the idea aims to solve]

However, since the slab is continuously moving at a speed of about 0.6 to 1.6 m/min, while the thermocouple mounting device is pressed against the slab, the tip of the fastener gun is dragged by the slab in the direction of movement. As a result, the driven member also moves together with the slab and interferes with the tip of the fastener gun. This may not only cause mechanical damage to the tip of the fastener gun, but also damage the thermocouple itself or the sheath wire of the thermocouple after it has been driven. If the pressing time of the tip of the riveting gun is shortened to within 0.2 seconds, the movement range where there is a possibility of interference can be kept within 6 mm, but conventional thermocouple mounting devices do not allow such movement. .

The present invention provides a means to avoid the aforementioned disturbances that may occur during the installation of thermocouples, reducing mechanical and thermal damage to the riveting gun, i.e., making it negligible or having no adverse effects. The purpose is to

[Means to solve the problem]

In order to achieve this purpose, the thermocouple mounting device of the present invention is equipped with a stud consisting of a thermocouple temperature measuring junction and a washer attached to the tip of a gun barrel having a piston that moves forward due to the propulsive force generated by the explosion of gunpowder. A thermocouple mounting device for driving a thermocouple into a continuous slab by striking it with the piston, the center recess for accommodating a stud formed by attaching a thermocouple temperature measuring junction and a washer to the tip of the barrel; It is characterized in that a groove wider than the diameter of the washer and a narrow groove connected to the washer diameter and a narrow groove through which the sheath wire of the thermocouple temperature measuring junction passes are formed.

[Effect]

The tip of the rivet gun is pressed against the slab so that the wide concave groove is in the direction of slab transfer, and when the rivet is fired and the thermocouple temperature measuring junction is attached to the slab together with the washer and the rivet, the gun fires. Until it retreats, these components move together with the slab, but since the washer moves through a wide concave groove and the gun moves within the widened part of the center hole, there is no interference, and the sheath wire moves through a narrow groove. Since it follows from the concave groove, it does not cause cutting. As a result, the riveting gun is protected from mechanical damage due to drag or interference from the casting side to which it moves.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The thermocouple mounting device according to the present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings. 1st
The figure shows a longitudinal side view of the vicinity of the end of the fastener gun, and FIG. 2 shows a front view of the tip.

At the center of the barrel 1 of the riveting gun, there is a piston 2 that moves forward in response to the explosive force of gunpowder from the rear, and the rod portion 2A of the piston 2 is connected to the center hole 1A of the same diameter in the barrel 1.
is tightly loosely fitted and guided.

A stud 3 is fitted and supported at the end of the center hole 1A by fitting the head 3A.
In front of A, the center hole 1A is widened to avoid interference. To be more specific, the tip 1b of the barrel 1 of the fastener gun is formed by an aluminum jig 4 that is integrally attached to the end surface 1a of the barrel 1. The part of the jig 4 forming the barrel tip 1b can be configured to be detachable and replaceable using the attachment hole 4A. A recess 4B is provided at the center of the front surface of the jig 4, which is the barrel tip 1b pressed against the slab, and a circular washer 5 and a thermocouple temperature measuring junction 6 attached to the outer surface of the jig 4 are connected to the end surface of the jig 4 ( In other words, it is housed in such a way that it does not protrude beyond the barrel tip surface. The stud 3 penetrates the center of the washer 5 and protrudes a little, but similarly does not protrude from the end face of the jig 4. Continuing from the center recess 4B, a groove 4C slightly wider than the diameter of the washer 5 is formed in the slab transfer direction shown by arrow A.
It is provided over an interference avoidance length of about mm.
This means that if the pressing time of the tip of the fastener gun is reduced to within 0.2 seconds, the movement range where there is a possibility of interference will be 6.
This is because it can be kept within mm, but is not particularly limited to this. In addition, the center recess 4
Continuing from B, a narrow groove 4D is provided on the opposite side to the groove 4C. Connecting portions 4 are provided at the outer ends of the grooves 4C and 4D.
Because of the presence of E and 4F, the jig 4 is not divided into two by the central recess 4B and the grooves 4C and 4D.

Sheath wire 7 electrically connected to temperature measuring contact 6
is led out from the groove 4D side through the recess of the connecting portion 4F. Further, an air hole 1B is provided in the gun barrel 1 to allow air in the confinement recess 8 to escape to the outside when the piston 2 moves forward, and this air hole 1B is also opened into the groove 4D.

Thus, in the thermocouple mounting device of the present invention, the barrel tip portion 1b of the fastener gun has a wide groove 4C that allows movement of the washer 5 connected to the center recess 4B, and a narrow groove 4C for leading out the sheath wire 7. A concave groove 4D is formed.

Therefore, the tip 1b of the rivet gun is pressed against the moving slab so that the wide concave groove 4C is aligned with the direction of slab transfer, and the stud 3 is struck by the impact of the piston 2, causing the thermocouple temperature measurement junction 6 is driven into the slab together with the washers 5 and rivets 3, they move in the direction A together with the slab until the riveting gun retreats.
Since the washer 5 can move along the wide groove 4C, and the stud 3 moves inside the widened part of the center hole 1A, no interference occurs, and the sheath wire 7 can move along the narrow groove 4D from the opposite side. Since it will accompany you, it will not cause disconnection.

[Effect of idea]

According to the thermocouple mounting device according to the present invention described above, there is no drag from the casting side to which the fastener gun moves.
The risk of mechanical damage to the tip due to interference is reduced. In addition, if the tip of the gun barrel is formed as a removable and replaceable jig as in the example, if the tip gets damaged due to the high heat of the slab, it can be replaced, so if the end of the gun barrel is only mechanically damaged. This provides two effects: protection from thermal damage.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of the vicinity of the end of a fastener gun in a thermocouple mounting device according to an embodiment of the present invention, and FIG. 2 is a front view of the tip of the gun barrel. 1... Gun barrel, 1A... Center hole, 1B... Air hole, 1a... End face of gun barrel, 1b... Tip of gun barrel, 2... Piston, 2A... Rod part, 3...
Stud, 3A... Head, 4... Jig, 4A... Mounting hole, 4B... Center recess, 4C, 4D... Concave groove, 4
E, 4F... Connecting part, 5... Watshiya, 6...
Thermocouple temperature measuring junction, 7... Sheath wire, 8... Confinement recess, A... Slab transfer direction.

Claims (1)

[Scope of utility model registration request] A thermoelectric device in which a rivet consisting of a thermocouple temperature measuring junction and a washer is attached to the tip of a gun barrel having a piston that moves forward by the propulsive force of the explosion of gunpowder, and the rivet is struck by the piston and driven into a continuous slab. The mounting device includes a central recess for accommodating a stud formed by attaching a thermocouple temperature measuring junction and a washer to the tip of the gun barrel, a groove connected to the central recess and having a width wider than the washer diameter, and a thermocouple A device for attaching a thermocouple to a continuous cast piece, characterized by forming a narrow concave groove through which a sheath wire of a temperature measuring junction passes.