JPH0214808Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a temperature measuring device for a steel plate in a steel plate rolling process, and particularly to a temperature measuring device for measuring the back side temperature of a steel plate.

(Conventional technology and its problems) Conventionally, for example, temperature control during rolling of thick steel plates involves installing optical thermometers at various locations such as the descaling stand, the front and rear surfaces of the rolling mill, and the water cooling equipment, and measuring the temperature on the front side of the thick steel plate. This was done by measuring the In other words, it is difficult to install the temperature measurement on the back side due to the location, and in the past, only the temperature on the front side of the steel plate was measured, and rolling control was performed based on this for quality control. Since the accurate temperature distribution on the front and back sides of the steel plate cannot be determined, it is impossible to perform rolling with precise temperature control in the thickness direction, and therefore it is not possible to stabilize the mechanical properties of the thick steel plate in the thickness direction. In addition, the temperature setting in a heating furnace is usually set so that the front side > the back side, but since the back side temperature of the thick steel plate during rolling is unknown, the temperature difference between the front and back sides during cooling control becomes the front side < the back side, which is the difference between the front side and the back side of the thick steel plate. This is a cause of collision accidents caused by the warping of the vehicle (nose up).

The present invention has been made with the aim of solving the above problems.

(Means for solving the problem) In other words, the present invention provides temperature measuring devices above and below the table roller that conveys the steel plate, and controls the temperature in the thickness direction by measuring the temperature from both the front and back sides of the steel plate. The purpose of the present invention is to provide a backside temperature measuring device that can be installed inside the roller table.The temperature sensor can be positioned from the outside at the required position below the rollers of the roller table, and can be installed on the base of one side of the roller table. A pedestal supporting a pair of opposing guide rails extending diagonally downward and toward the widthwise center of the roller table from above the foundation is mounted, and each is guided by the pair of guide rails on the pedestal. At the front end of the temperature measuring device body, which has rollers on both sides and can be moved freely on the stand,
This is a backside temperature measuring device for a steel plate, characterized in that a temperature measuring device is engaged and mounted by holding a temperature detector at a predetermined elevation angle and connecting a traction lifting device at the rear end.

(Function) The device of the present invention has a temperature sensor movably mounted on a guide rail supported by a pedestal whose lower end on the other side reaches a required position below the rollers of the roller table. , it is possible to measure the temperature on the back side of a steel plate without adopting a complicated structure.

(Example) An example will be described below based on the drawings.

FIG. 1 shows the process of rolling a thick steel plate. In this apparatus, a thick steel plate A extracted from a heating furnace is guided onto a roller table d, and a scale layer on the surface is peeled off by a descaling stand b. Next, after passing through a descaling stand b, it is reversibly reciprocated and rolled by a rolling mill a until it reaches a predetermined size.
After the rolling is completed, the material is water cooled by a rear water cooling device c in order to satisfy predetermined mechanical properties.

For quality control in the above process, a temperature measuring device 1 is installed above the roller table d, around the operator's cab e, for monitoring the temperature in the descaling stand b sequentially in the flow direction of the steel plate. Temperature measuring device 2 for temperature monitoring (left side in Figure 1), temperature measuring device 3 for temperature monitoring on the exit side of the rolling mill (right side in Figure 1), temperature measuring device for temperature monitoring of the rear water cooling device Each temperature measuring device of the device 4 is provided to measure the temperature of the front side of the thick steel plate A, and is located inside the roller table d at least at a position immediately below corresponding to 1 and 3 above, that is, below between the table rollers. Back surface temperature measuring devices 5a and 5b are provided so that the back surface temperature of the thick steel plate A can be measured at the same time. As for its structure, as shown in FIG.
A cooling water supply pipe 8, a purge air supply pipe 9, and a signal line pipe 10, which pass through the main body 6, are connected to the main body 6. Further, the temperature detector 7 is, for example, an optical pyrometer, which is set at an elevation angle of about 45 degrees with respect to the horizontal, and its tip is directed toward the center of the thick steel plate A for the convenience of obtaining average temperature information. It is installed. By the way, since the back side of a thick steel plate during normal rolling comes into contact with the rollers of the roller table d, scale falls off during conveyance and cooling water scatters during descaling. Therefore, in the present invention, a protective plate 11 is provided above the temperature sensor 7 to prevent scale and cooling water from entering the temperature sensor 7, which is installed diagonally upward as described above, to maintain measurement accuracy. is running.

The back surface temperature measuring device 5 is installed below between the rollers of a roller table d which is mounted on a shaft at a constant interval, and the main body 6 is placed on a foundation on one side of the roller table d. The roller table d is inserted along the pedestal 12 supported so as to extend diagonally downward toward the center in the width direction of the roller table d, and is fixed therein. That is, the device of the present invention is divided into a back surface temperature measuring device 5 and a pedestal 12 that supports it, and the back surface temperature measuring device 5 can be separated from the pedestal 12 and taken out upward.

5 and 6 show other embodiments of the back surface temperature measuring device 5, in which a temperature detector 7 is shown.
The main body 6 to which the main body 6 is attached has rollers 13 on both sides, a guide rail 14 for guiding the rollers 13 on the pedestal 12, and a temperature sensor 7 that moves up and down together with the main body 6. Movement is provided via a wire rope 15 connected to the main body 6. The cooling water supplied via the cooling water supply pipe 8 described above constantly cools the main parts of the temperature detector 7, and the air sent via the purge air supply pipe 9 cools the temperature detector 7.
It serves the purpose of removing dust that is sprayed at the tip of the blade.

(Effect of the invention) The backside temperature measuring device 5 of the present invention is installed on the descaling stand b and the exit side of the rolling mill a, and in addition to the conventional temperature measuring devices 1, 2, 3, and 4, temperature control during the rolling process is performed. If this is carried out, the temperatures on the front and back sides of the thick steel plate A can be controlled to be as uniform as possible based on the respective temperature measurements. For example, by performing rolling while adjusting the amount of water jetted from the descaling device b installed in the rolling mill a, variations in temperature between the front and back surfaces of the steel sheet can be reduced, and the mechanical properties in the thickness direction can be stabilized. Accidents caused by the tip of the thick steel plate being rolled can be prevented.

The back surface temperature measuring device of the present invention is constructed so that it can be inserted and installed using a pedestal as a guide, so it can be lightweight and easy to handle and maintain and inspect the temperature detector. Furthermore, there is no intrusion of water or scale into the temperature sensor, and highly accurate temperature measurement can be achieved. Also, by providing this back surface temperature measuring device, it is possible to achieve a remarkable effect compared to conventional temperature control.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the location of the temperature measuring device, Fig. 2 is a front view showing an example of installing the back temperature measuring device, Fig. 3 is an enlarged view of the detector section, and Fig. 4 is the third
XX sectional view in the figure, FIG. 5 is a front view showing another embodiment of the device, and FIG. 6 is a Y--
It is a Y view. 1, 2, 3, 4 are surface temperature measuring devices, 5 is a back temperature measuring device, 6 is the main body, 7 is a temperature detector, 12
is a trestle.

Claims (1)

[Scope of utility model registration request] A pair of opposing temperature sensors are installed on the foundation on one side of the roller table and extend diagonally downward from the foundation toward the center in the width direction of the roller table, so that a temperature sensor can be externally positioned at a required position below the rollers of the roller table. A mount supporting guide rails is installed, and rollers each guided by the pair of guide rails are provided on both sides of the mount to allow the temperature measurement device to move freely on the mount. 1. An apparatus for measuring the back surface temperature of a steel plate, characterized in that a temperature measuring apparatus comprising a detector held at a predetermined elevation angle and a traction lifting device connected to the rear end is engaged and mounted.