CN116481663A - A temperature measuring unit and a multi-point contact temperature measuring device including the temperature measuring unit - Google Patents

Abstract

The invention discloses a temperature measuring unit, which comprises a metal ring and thermocouple wires connected thereto; the circumferential surface of the metal ring is in contact with the surface of a temperature-measuring piece; the thermocouple wires have multiple groups, one end of which is connected to the side end surface of the metal ring. The invention also discloses a multi-point contact temperature measuring device including the temperature measuring unit, which is characterized in that it also includes a mounting base, a bearing, a rotating shaft and a slip ring. The invention avoids and ignores metal components, surface oxidation, especially the interference of cooling water on the metal surface, so as to monitor the real-time temperature change of the metal in the heat treatment process in real time.

Description

A temperature measuring unit and a multi-point contact temperature measuring device comprising the temperature measuring unit

technical field

The invention relates to the temperature measurement technology of metal thermal processing, and more specifically, relates to a temperature measurement unit and a multi-point contact temperature measurement device including the temperature measurement unit.

Background technique

In the metal forming production process, accurate and continuous temperature measurement of the workpiece surface and corresponding online adjustment of the heat treatment process system are the key factors to ensure product quality.

The commonly used online temperature measurement method is mainly the infrared radiation thermometer. The infrared radiation thermometer first presets the emissivity coefficient of the metal surface to be tested, and then converts the electrical signal detected by the infrared detector to convert the temperature. However, there are many factors affecting the radiation system. In addition to the metal itself such as composition and surface condition (oxidation), external factors such as cooling water covering the metal surface also greatly affect the temperature measurement accuracy.

In existing patent applications, such as German Patent Publication No. EP1752231 (A2) discloses Measuring roller for measuring the tension and/or the temperature of a band across the bandwidth for a flatness control when rolling band material. And the Chinese patent authorization announcement number CN201358284Y discloses a strip steel temperature measuring roll for a continuous annealing furnace.

The above two patents are a kind of temperature measuring roll for cold rolling, the inner wall of which is hollow, and the thermocouple wire is attached to the position about 5mm away from the roll surface from the inside of the roll. The thermocouple wire rotating with the roll surface transfers the signal to the static temperature measuring instrument outside the roll through a "slip ring", and finally measures the temperature after being transmitted from the roll surface to the inner wall of the roll.

The disadvantages of these two patents:

1) In order to ensure the rigidity of the roller body, it is not easy to deform, so the inner wall of the roller needs to be relatively thick, and the distance between the thermocouple contact point and the measured point is about 5mm, so the accuracy of the measured temperature is poor;

2) Similarly, in order to ensure rigidity and strength, the surface of the roller must be made of high-strength and wear-resistant materials, and copper and other materials with better thermal conductivity and more sensitive temperature measurement cannot be used;

3) In order to weld and fix the thermocouple on the inner wall of the roller from the inside of the roller, people need to drill into the roller to operate, so the diameter of this temperature measuring roller is very large and cannot be used in places with limited space;

4) If a thermocouple wire in the roller is in poor contact or degrades and falls off after a period of use, it is very inconvenient to repair and replace, and the entire roller needs to be disassembled offline.

To sum up, this kind of temperature measuring roller has a large diameter, complex structure and high cost.

Contents of the invention

In view of the above defects in the prior art, the object of the present invention is to provide a temperature measuring unit and a multi-point contact temperature measuring device comprising the temperature measuring unit, to avoid and ignore the interference of metal components, surface oxidation, especially the cooling water on the metal surface, so as to monitor the real-time temperature change of the metal in the heat treatment process in real time.

To achieve the above object, the present invention adopts the following technical solutions:

The first aspect of the present invention provides a temperature measuring unit, including a metal ring and a thermocouple wire connected thereto;

The circumferential surface of the metal ring is in contact with the surface of the temperature-measuring piece;

There are multiple sets of thermocouple wires, one end of which is connected to the side end surface of the metal ring.

Preferably, the thickness of the metal ring is 0.25-2mm.

Preferably, the metal ring is a copper ring, an aluminum alloy ring or a silver ring.

The second aspect of the present invention provides a multi-point contact temperature measuring device including the temperature measuring unit, and also includes a mounting base, a bearing, a rotating shaft and a slip ring;

There are two bearings, which are respectively located at the end positions of the installation base;

One end of the rotating shaft is connected to one of the bearings, and the other end is connected to the temperature measuring unit through the other bearing;

The slip ring is arranged on the rotating shaft and between the two bearings.

Preferably, the bearing is an outer spherical bearing with a seat; and/or

The other end of the shaft is provided with a supporting tube; and/or

The metal ring is set on the support tube and/or

The slip ring includes a slip ring mover and a slip ring stator; and/or

The slip ring stator is connected with a temperature measuring instrument through a signal line; and/or

The other end of the thermocouple wire is connected to the slip ring mover; and/or

The temperature measurement signal of the thermocouple wire received by the slip ring mover is output to the temperature measurement instrument through the slip ring stator.

Preferably, the rotating shaft is set to be hollow, and a slot hole is also opened on the rotating shaft;

The thermocouple wire is placed in the rotating shaft, and the other end of the thermocouple wire passes through the slot.

Preferably, the other end of the rotating shaft is also provided with a compression sleeve and/or for pressing against and preventing the axial movement of the metal ring

Both ends of the rotating shaft are provided with fixing nuts.

The third aspect of the present invention provides a multi-point contact temperature measuring device including the temperature measuring unit, and also includes a mounting base, a bearing, a rotating shaft and a slip ring;

There are two bearings, which are respectively located at the end positions of the installation base;

Both ends of the rotating shaft are respectively connected to the corresponding bearings;

There are two temperature measuring units, both of which are arranged on the rotating shaft and between the two bearings;

The slip ring is arranged on the rotating shaft and located between the two temperature measuring units.

Preferably, the bearing is an outer spherical bearing with a seat and/or

A supporting circular tube is provided on the rotating shaft; and/or

The metal ring is set on the support tube and/or

The slip ring includes a slip ring mover and a slip ring stator; and/or

The slip ring stator is connected with a temperature measuring instrument through a signal line; and/or

The other end of the thermocouple wire is connected to the slip ring mover; and/or

The temperature measurement signal of the thermocouple wire received by the slip ring mover is output to the temperature measurement instrument through the slip ring stator.

Preferably, the rotating shaft is also provided with a compression sleeve and/or for pressing against and preventing the axial movement of the metal ring

Both ends of the rotating shaft are provided with fixing nuts.

The present invention provides a temperature measuring unit and a multi-point contact temperature measuring device including the temperature measuring unit. The annular temperature measuring surface is close to the surface of the metal workpiece to be measured, and actively or passively rotates along with the workpiece. The multiple temperature measuring points arranged along the ring thus realize multi-point continuous temperature measurement. The device of the present invention has the advantages of simple structure, convenient maintenance, low cost and small size, and is suitable for various scenes requiring temperature measurement. Since the distance between the temperature measurement point and the tested part is extremely short, the temperature measurement is faster and more accurate; the present invention is simple in structure, easy to implement, low in cost, and easy to maintain; the present invention is a direct solid conduction temperature measurement, which will not be disturbed by water flow, and is also very suitable for measuring the temperature of the tested part in the cooling water injection area; in addition, the device is small in size and can be widely used in various scenarios with limited space.

Description of drawings

Fig. 1 is the structural representation of temperature measurement unit of the present invention;

Fig. 2 is a schematic structural view of Embodiment 1 of the multi-point contact temperature measuring device of the present invention;

Fig. 3 is a schematic structural view of Embodiment 2 of the multi-point contact temperature measuring device of the present invention;

Fig. 4 is a schematic diagram of the use state of Embodiment 1 of the multi-point contact temperature measuring device of the present invention;

Fig. 5 is a schematic diagram of the use state of Embodiment 2 of the multi-point contact temperature measuring device of the present invention.

Detailed ways

In order to better understand the above-mentioned technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the drawings and embodiments.

As shown in FIG. 1 , a temperature measurement unit provided by the present invention includes a metal ring 1 and a thermocouple wire 2 connected thereto.

The circumferential surface of the metal ring 1 is in contact with the surface of the temperature-measuring piece 3, and one end of multiple sets of thermocouple wires 2 for temperature measurement is connected to the side end surface of the metal ring 1 close to the outer circle, and close to the circumferential surface of the metal ring 1, so as to shorten the distance between the temperature-measuring point and the temperature-measuring piece 3 as much as possible, so that the temperature measurement is faster and more accurate. This method is closer to the surface of the temperature-measuring piece 3 than the prior art, and the temperature measurement will be more accurate.

The thickness of the metal ring 1 is 0.25mm-2mm.

The metal ring 1 is a copper ring, an aluminum alloy ring or a silver ring with good thermal conductivity.

The metal ring 1 can rotate passively with the movement of the temperature-measuring part 3, and can also actively rotate synchronously according to the moving speed of the temperature-measuring part 3 (especially when the moving speed of the temperature-measuring part 3 is fast), so as to avoid wear on the surface of the metal ring 1.

When the metal ring 1 rotates, multiple sets of thermocouple wires 2 attached to the side of the ring can periodically measure the temperature conducted from the outer circle of the ring.

This structure and temperature measurement method are very convenient for quick replacement of worn metal rings or broken thermocouple wires, and do not require the large size of traditional temperature measurement rollers, can be arranged in a relatively small space, and the cost will be greatly reduced.

As shown in FIG. 2 , Embodiment 1 of the present invention provides a multi-point contact temperature measuring device including a temperature measuring unit, and also includes a mounting base 4 , a bearing 5 , a rotating shaft 6 and a slip ring.

There are two bearings 5, which are respectively located at the end positions of the upper surface of the installation base 4, and the outer spherical bearing with seat is selected for use.

One end of the rotating shaft 6 is connected to one of the bearings 5, and the other end is provided with a supporting circular tube 7. After the end passes through the other bearing 5, the metal ring 1 in the temperature measuring unit is placed on the supporting circular tube 7, and the supporting circular tube 7 provides support for the metal ring 1, so that the metal ring 1 can be made very thin and will not deform when it contacts the temperature-measuring part 3.

The metal ring 1 is used to contact the temperature-measured part 3 and transfer heat. It is desirable to use a high-temperature-resistant metal with good thermal conductivity (such as copper or aluminum alloy materials, and a silver ring can be used when the temperature measurement response is extremely high).

The supporting circular tube 7 is made of a material with good thermal insulation performance, and its outer diameter matches the inner diameter of the metal ring 1 to ensure the rigidity of the metal ring 1 .

The slip ring is located on the rotating shaft 6 and between the two bearings 5. The slip ring includes a slip ring mover 8 and a slip ring stator 9, and a signal line is used to connect the terminal 902 of the slip ring stator 9 and a temperature measuring instrument (not shown in the figure).

The slip ring stator 9 is installed on the installation base 4 through the stator fixing structure 901 .

The rotating shaft 6 is set to be hollow, and a slot 11 is also opened on the rotating shaft 6 .

The other end of the rotating shaft 6 is also provided with a compression sleeve 12, the compression sleeve 12 tightly presses the metal ring 1 against the support tube 7, and a plurality of slots are opened on the end surface of the metal ring 1 near the metal ring 1 for passing the thermocouple wire 2.

One end of the thermoelectric puppet line 2 is connected to the side surface of the metal ring 1 and is located in the shaft 6. The other end is connected to the wiring end 801 of the slide ring 8, and one end of the thermoelectric puppet 2 is welded on the end surface of the metal ring 1. Note that the slot 12 of the tight set 12 corresponds to each thermocouple welded point to avoid breaking the thermocouple line 2.

The axial stopper 13 is sleeved on the rotating shaft 6, and is used to prevent the metal ring 1 from moving in the axial direction, and has no other functions.

After passing through the slip ring, the signal of the thermocouple wire 2 is transmitted from the terminal 902 of the slip ring stator to the temperature measuring instrument (not shown in the figure). In this way, when the metal ring 1 touches the surface of the temperature-measured part 3 and rotates accordingly, the multiple sets of thermocouple wires 2 welded to the side of the metal ring 1 can periodically obtain the temperature signal conducted by the metal ring 1.

Both ends of the rotating shaft 6 are provided with fixing nuts 14 for fixing.

As shown in FIG. 3 , Embodiment 2 of the present invention provides a multi-point contact temperature measuring device including a temperature measuring unit, which also includes a mounting base 4 , a bearing 5 , a rotating shaft 6 and a slip ring.

There are two bearings 5, which are respectively located at the end positions of the upper surface of the installation base 4, and the outer spherical bearing with seat is selected for use.

Both ends of the rotating shaft 6 are respectively connected with the corresponding bearings 5 and fixed by fixing nuts 14 .

Two supporting round tubes 7 are provided on the rotating shaft 6 and are located between the two bearings 5. There are also two temperature measuring units. The metal ring 1 is set on the corresponding supporting round tube 7, and the supporting round tube 7 provides support for the metal ring 1. In this way, the metal ring 1 can be made very thin and will not deform when it contacts the temperature-measuring part 3.

The metal ring 1 is used to contact the temperature-measured part 3 and transfer heat. It is desirable to use a high-temperature-resistant metal with good thermal conductivity (such as copper or aluminum alloy materials, and a silver ring can be used when the temperature measurement response is extremely high).

The supporting circular tube 7 is made of a material with good thermal insulation performance, and its outer diameter matches the inner diameter of the metal ring 1 to ensure the rigidity of the metal ring 1 .

The slip ring is arranged on the rotating shaft 6 and is located between the two temperature measuring units. The slip ring includes the slip ring mover 8 and the slip ring stator 9, and the terminal 902 of the slip ring stator 9 is connected to the temperature measuring instrument (not shown in the figure) by a signal line.

The slip ring stator 9 is installed on the installation base 4 through the stator fixing structure 901 .

The rotating shaft 6 is hollow, and the rotating shaft 6 is also provided with a compression sleeve 12. The compression sleeve 12 presses the metal ring 1 tightly against the support tube 7, and a plurality of slots are opened on the end surface near the metal ring for passing the thermocouple wire 2.

One end of the thermoelectric puppet line 2 is connected to the side surface of the metal ring 1 and is located in the shaft 6. The other end is connected to the wiring end 801 of the slide ring 8, and one end of the thermoelectric puppet 2 is welded on the end surface of the metal ring 1. Note that the slot 12 of the tight set 12 corresponds to each thermocouple welded point to avoid breaking the thermocouple line 2.

After passing through the slip ring, the signal of the thermocouple wire 2 is transmitted from the terminal 902 of the slip ring stator to the temperature measuring instrument (not shown in the figure). In this way, when the metal ring 1 contacts the surface of the temperature-measured part 3 and rotates accordingly, the multiple sets of thermocouple wires 2 welded to the side of the metal ring 1 can periodically obtain the temperature signal conducted by the metal ring 1.

Compared with the multi-point contact temperature measuring device in Example 1, the multi-point contact temperature measuring device in Example 2 has metal rings 1 not protruding to one side, but are installed in pairs in two bearings 5. This form is suitable for placing the entire temperature measuring mechanism against a large temperature measuring part 3 for temperature measurement.

As shown in Figure 4, after online heat treatment, the strength of cold-formed steel will be greatly increased. Correspondingly, it is necessary to accurately monitor the temperature to which the workpiece is heated to feed back the output of the heating furnace, and it is also necessary to accurately monitor the temperature drop of the workpiece during the cooling process to control the injection flow and pressure of the cooling system. The multi-point contact temperature measuring device of Example 1 is suitable for this working condition.

The multi-point contact temperature measuring device of Embodiment 1 is placed behind the heating furnace 101 behind the frame 100 of the section steel production line, and can also be placed inside the cooling system to monitor and feedback the temperature drop during the cooling process, or placed behind the cooling system to monitor the final temperature after cooling is completed. The measured temperature piece 3 can be various special-shaped pieces such as square pipe, C-shaped steel, and I-shaped steel. It should be particularly noted that since the present invention uses direct solid conduction temperature measurement and is not disturbed by water flow, the temperature measurement scene of this embodiment 1 is especially suitable for temperature measurement of metal strips in the water cooling process.

As shown in Figure 5, some metal materials, such as magnesium alloys, have poor plastic deformation at room temperature, and temperature-controlled rolling must be carried out at a certain temperature (≥90°C). This working condition requires heating the rolled piece itself (metal strip 200) and the surface of the roll 201 to the temperature specified by the process to ensure the temperature of the "rolling deformation zone". Therefore, it is necessary to accurately monitor the temperature of the work roll surface to control the power output of the roll heating system. The temperature measuring unit in the multi-point contact temperature measuring device of embodiment 2 is attached to the surface of the work roll 201 of the warm rolling mill to actually measure the temperature of the work roll 201 of the warm rolling mill, so as to facilitate the feedback control of the roll heating system.

If the temperature measuring unit in the multi-point contact temperature measuring device of Embodiment 2 is attached to the surface of the metal strip 200, the temperature of the surface of the metal strip 200 can be actually measured to facilitate feedback control of the strip heating system.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not used as a limitation to the present invention. As long as they are within the spirit of the present invention, changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims (10)

1. A temperature measuring unit, characterized in that: comprising a metal ring and a thermocouple wire connected thereto; The circumferential surface of the metal ring is in contact with the surface of the temperature-measuring piece; There are multiple sets of thermocouple wires, one end of which is connected to the side end surface of the metal ring. 2. The temperature measuring unit according to claim 1, characterized in that: the thickness of the metal ring is 0.25-2mm. 3. The temperature measuring unit according to claim 1, wherein the metal ring is a copper ring, an aluminum alloy ring or a silver ring. 4. A multi-point contact temperature measuring device comprising the temperature measuring unit according to any one of claims 1-3, characterized in that: it also includes a mounting base, a bearing, a rotating shaft and a slip ring; There are two bearings, which are respectively located at the end positions of the installation base; One end of the rotating shaft is connected to one of the bearings, and the other end is connected to the temperature measuring unit through the other bearing; The slip ring is arranged on the rotating shaft and between the two bearings. 5. The multi-point contact temperature measuring device according to claim 4, characterized in that: The bearing is an insert spherical bearing with a seat; and/or The other end of the shaft is provided with a supporting tube; and/or The metal ring is sleeved on the support tube; and/or The slip ring includes a slip ring mover and a slip ring stator, and a temperature measuring instrument is connected to the slip ring stator through a signal line; and/or The other end of the thermocouple wire is connected to the slip ring mover; The temperature measurement signal of the thermocouple wire received by the slip ring mover is output to the temperature measurement instrument through the slip ring stator. 6. The multi-point contact temperature measuring device according to claim 5, characterized in that: the rotating shaft is set to be hollow, and there are slotted holes on the rotating shaft; The thermocouple wire is placed in the rotating shaft, and the other end of the thermocouple wire passes through the slot. 7. The multi-point contact temperature measuring device according to claim 4, characterized in that: the other end of the rotating shaft is also provided with a compression sleeve for pressing against and preventing axial movement of the metal ring; and/or Both ends of the rotating shaft are provided with fixing nuts. 8. A multi-point contact temperature measuring device comprising the temperature measuring unit according to any one of claims 1-3, characterized in that: it also includes a mounting base, a bearing, a rotating shaft and a slip ring; There are two bearings, which are respectively located at the end positions of the installation base; Both ends of the rotating shaft are respectively connected to the corresponding bearings; There are two temperature measuring units, both of which are arranged on the rotating shaft and between the two bearings; The slip ring is arranged on the rotating shaft and located between the two temperature measuring units. 9. The multi-point contact temperature measuring device according to claim 8, characterized in that: The bearing is an insert spherical bearing with a seat; and/or A supporting tube is provided on the rotating shaft, and the metal ring is sleeved on the supporting tube; and/or The slip ring includes a slip ring mover and a slip ring stator, and a temperature measuring instrument is connected to the slip ring stator through a signal line; and/or The other end of the thermocouple wire is connected to the slip ring mover; and/or The temperature measurement signal of the thermocouple wire received by the slip ring mover is output to the temperature measurement instrument through the slip ring stator. 10. The multi-point contact temperature measuring device according to claim 8, characterized in that: the rotating shaft is also provided with a compression sleeve for pressing against and preventing axial movement of the metal ring; and/or Both ends of the rotating shaft are provided with fixing nuts.