Thermocouple and crystallizer

Abstract

The utility model discloses a thermocouple and a crystallizer, and the thermocouple comprises a thermal resistor which is fixedly connected with a check ring, and the size of the cross section of the check ring is larger than the size of the cross section of the thermal resistor; the installation assembly comprises a nut, a first sealing ring and an elastic element, the nut is provided with a step through hole, the step through hole comprises a first hole and a second hole which are coaxially communicated, the diameter of the second hole is larger than that of the first hole, and therefore a straight step face is formed between the second hole and the first hole; and the first sealing ring and the elastic element are sequentially sleeved on the thermal resistor between the straight step surface of the screw cap and the end surface of the check ring. The sealing ring and the elastic element are arranged in the inner hole of the nut of the thermocouple, and the elastic element is shielded by the check ring of the thermal resistor, so that the elastic element extrudes the sealing ring after the nut is installed on an equipment shell at a position to be subjected to temperature measurement, and a gap between the inner hole of the nut and the thermal resistor can be well sealed. The method can be applied to the crystallizer and can also be applied to other application scenes needing side temperature.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature measuring instruments, and specifically relates to a thermocouple and a crystallizer. Background Art

[0002] The crystallizer is known as the "heart" of the continuous casting machine. It plays a vital role in the solidification of high-temperature molten steel to form a billet shell, providing a strong guarantee for the continuous production of the continuous casting machine. The crystallizer leakage prediction system monitors the temperature of each point of the crystallizer copper plate in real time through multiple rows of thermocouples installed on the crystallizer copper plate, and then judges the contact state between the molten steel and the crystallizer copper plate through temperature changes, that is, whether the entire copper plate is adhered to the molten steel, whether the temperature of the copper plate is abnormal, and performs leakage prediction, etc.

[0003] Thermocouples are usually installed on the crystallizer by screwing a nut with an external thread. A large amount of water vapor will be generated when pouring steel. If the seal is not tight, water vapor will penetrate from the threaded installation position, causing inaccurate thermocouple temperature detection and false alarms of the steel leakage system. For this reason, an annular groove is usually processed on the nut, and a sealing ring is sleeved on the annular groove to prevent water vapor from penetrating from the threaded installation position. In addition, the thermal resistor of the thermocouple also passes through the inner hole of the nut and is connected to the cable. However, the applicant found that there is currently no solution to prevent water vapor from the inner hole of the nut, and water vapor may also enter the crystallizer from here, resulting in inaccurate thermocouple temperature detection. Utility Model Content

[0004]

Technical issues

[0005] The utility model is aimed at the current situation that the thermocouple is only sealed from its installation thread, but the inner hole of the nut through which the thermal resistor passes is not protected. The utility model can effectively prevent the nut from leaking by arranging a sealing ring and an elastic element in the inner hole of the nut.

[0006]

Technical solution

[0007] A thermocouple, comprising:

[0008] A thermal resistor, to which a retaining ring is fixedly connected, wherein the cross-sectional dimension of the retaining ring is larger than the cross-sectional dimension of the thermal resistor;

[0009] The mounting assembly includes a nut, a first sealing ring and an elastic element. The nut has a stepped through hole, and the stepped through hole includes a first hole and a second hole that are coaxially connected. The diameter of the second hole is larger than the diameter of the first hole, thereby forming a straight step surface between the second hole and the first hole. The first sealing ring and the elastic element are sequentially sleeved on the thermal resistor between the straight step surface of the nut and the end face of the retaining ring.

[0010] Optionally, it also includes a cable, wherein the cable is connected to a thermal resistor passing through the first hole.

[0011] Optionally, a gasket is further provided on the thermal resistor between the elastic element and the sealing ring.

[0012] Optionally, the second hole is a stepped hole, including a third hole and a fourth hole, the third hole is coaxially connected to the first hole, and the fourth hole has a larger inner diameter than the third hole, thereby forming an inclined step surface between the third hole and the fourth hole, and the outer wall of the gasket is an inclined surface, and the inclined surface fits the inclined step surface.

[0013] Optionally, the angle between the inclined step surface and the axis of the nut is between 20° and 30°.

[0014] Optionally, the nut has external threads.

[0015] Optionally, an annular groove is provided on the end of the external thread on the nut away from the retaining ring, and a second sealing ring is sleeved in the annular groove.

[0016] Optionally, the elastic element is a spring.

[0017]

Beneficial Effects

[0018] The present application sets a sealing ring and an elastic element in the inner hole of the thermocouple nut, and uses the retaining ring of the thermal resistor to shield the elastic element, so that after the nut is installed on the device housing at the side temperature position, the elastic element squeezes the sealing ring, which can better seal the gap between the inner hole of the nut and the thermal resistor. The present application can be applied in a crystallizer to prevent external water vapor from entering the crystallizer, and can also be applied in other application scenarios that require temperature measurement and isolation from water vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By describing the embodiments thereof in conjunction with the following drawings, the above-mentioned features and technical advantages of the present utility model will become clearer and easier to understand.

[0020] Figure 1 It is a schematic diagram of a thermocouple according to the first embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of a nut according to an embodiment of the present application.

[0022] Figure 3 Schematic diagram of a gasket according to an embodiment of the present application.

[0023] Figure 4 It is a schematic diagram of a thermocouple according to the second embodiment of the present application.

[0024]

Brief reference numerals

[0025] Thermal resistor 1, retaining ring 2, cable 3, nut 4, first sealing ring 5, gasket 6, elastic element 7, step through hole 41, first hole 411, second hole 412, straight step surface 413, inclined step surface 414, third hole 415, fourth hole 416, second sealing ring 8. DETAILED DESCRIPTION

[0026] The embodiments of the present invention will be described below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the described embodiments may be modified in various ways or combinations thereof without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims. In addition, in this specification, the drawings are not drawn to scale and the same reference numerals represent the same parts.

[0027] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after connection remains unchanged.

[0028] Embodiment 1

[0029] Please refer to Figure 1 The thermocouple of this embodiment includes a thermal resistor 1, one end of which is used to be arranged at the position to be measured to measure the temperature of the position to be measured, and the other end is connected to a cable 3; an installation component is sleeved on the thermal resistor 1 and fixedly connected to the device housing outside the position to be measured, so that the thermal resistor 1 extends into the position to be measured; the cable 3 is used to be connected to a display instrument, and the display instrument will indicate the temperature measured by the thermocouple.

[0030] A retaining ring 2 is fixedly connected to the thermal resistor 1 , and the cross-sectional dimension of the retaining ring 2 is larger than the cross-sectional dimension of the thermal resistor 1 .

[0031] The mounting assembly includes a nut 4, a first sealing ring 5, a gasket 6 and an elastic element 7. The nut 4 has a stepped through hole 41. The stepped through hole 41 includes a first hole 411 and a second hole 412. The first hole 411 and the second hole 412 are coaxially connected, and the inner diameter of the first hole 411 is equivalent to the diameter of the thermal resistor 1. The diameter of the second hole 412 is larger than the diameter of the first hole 411, thereby forming a straight step surface 413 between the second hole and the first hole. The thermal resistor 1 can pass through the first hole 411 and connect to the cable 3. The cable 3 can be connected to a display instrument, and the display instrument will indicate the temperature measured by the thermocouple.

[0032] The first sealing ring 5, the washer 6 and the elastic element 7 are sequentially sleeved on the thermal resistor 1 between the step surface 413 of the nut 4 and the end surface of the retaining ring 2, and one end of the elastic element 7 abuts on the end surface of the retaining ring 2, and the other end abuts on the end surface of the washer 6, and the other end surface of the washer 6 abuts on the elastic element 7. The elastic element is preferably a spring, and can also be, for example, rubber. The nut 4 has an external thread. When the nut 4 is installed on the device housing through the external thread, the thermal resistor 1 extends into the side temperature position therein, and the elastic element 7 is compressed between the straight step surface 413 and the end surface of the retaining ring 2, and the elastic element 7 squeezes the washer 6 and the first sealing ring 5, so that the first sealing ring can seal the gap between the first hole 411 and the thermal resistor 1.

[0033] In some embodiments, the second hole 412 is a stepped hole, including a third hole 415 and a fourth hole 416, wherein the third hole 415 is coaxially connected to the first hole 411, and the fourth hole 416 is larger than the inner diameter of the third hole, thereby forming an inclined step surface 414 between the third hole and the fourth hole. Correspondingly, the outer wall of the gasket 6 is also inclined, and its inclined surface is used to correspond to the inclined step surface 414. When the elastic element 7 squeezes the gasket 6, the gasket 6 moves toward the center along the inclined surface, thereby squeezing the first sealing ring 5 toward the center, which can improve the sealing effect of the first sealing ring on the gap between the first hole 411 and the thermal resistor 1.

[0034] For example, the angle between the inclined step surface 414 and the axis of the nut is 30°.

[0035] The thermocouple can be installed on the crystallizer and screwed on the crystallizer shell through the nut, so that the thermal resistor is close to the crystallizer copper plate, and the temperature of the crystallizer copper plate can be measured. During the casting process, a large amount of water vapor will be generated in the environment where the crystallizer is located, and due to the effect of the first sealing ring, the water vapor cannot enter the crystallizer from the gap between the thermal resistor 1 and the first sealing ring.

[0036] Embodiment 2

[0037] The technical features of the second embodiment are basically the same as those of the first embodiment, except that a second sealing ring 8 is further provided on the outer periphery of the nut 4, and an annular groove can be machined at the root of the external thread of the nut 4, and the second sealing ring 8 is sleeved in the annular groove. The second sealing ring 8 can prevent leakage at the threaded installation position.

[0038] The other technical features of the second embodiment are the same as those of the first embodiment, and their description is omitted here.

[0039] The thermocouple can be installed on the crystallizer and screwed on the crystallizer shell through the nut, so that the thermal resistor is close to the crystallizer copper plate, and the temperature of the crystallizer copper plate can be measured. During the casting process, a large amount of water vapor will be generated in the environment of the crystallizer, and due to the effect of the first sealing ring, the water vapor cannot penetrate into the crystallizer from the gap between the thermal resistor 1 and the first sealing ring. Due to the effect of the second sealing ring, water vapor cannot penetrate into the crystallizer from the installation thread.

[0040] The utility model also provides a crystallizer, comprising any one of the thermocouples described above.

[0041] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A thermocouple, characterized in that: include: A thermal resistor, to which a retaining ring is fixedly connected, wherein the cross-sectional dimension of the retaining ring is larger than the cross-sectional dimension of the thermal resistor; The mounting assembly includes a nut, a first sealing ring and an elastic element. The nut has a stepped through hole, and the stepped through hole includes a first hole and a second hole that are coaxially connected. The diameter of the second hole is larger than the diameter of the first hole, thereby forming a straight step surface between the second hole and the first hole. The first sealing ring and the elastic element are sequentially sleeved on the thermal resistor between the straight step surface of the nut and the end face of the retaining ring.

2. The thermocouple according to claim 1, characterized in that Also included is a cable connected to a thermal resistor passing through the first hole.

3. The thermocouple according to claim 1, characterized in that A gasket is also sleeved on the thermal resistor between the elastic element and the sealing ring.

4. The thermocouple according to claim 3, characterized in that The second hole is a stepped hole, including a third hole and a fourth hole. The third hole is coaxially connected to the first hole, and the fourth hole has a larger inner diameter than the third hole, thereby forming an inclined step surface between the third hole and the fourth hole. The outer wall of the gasket is an inclined surface, and the inclined surface fits the inclined step surface.

5. The thermocouple according to claim 4, characterized in that The angle between the inclined step surface and the axis of the nut is between 20° and 30°.

6. The thermocouple according to claim 2, characterized in that The nut has external threads.

7. The thermocouple according to claim 6, characterized in that An annular groove is arranged on one end of the external thread of the nut away from the retaining ring, and a second sealing ring is sleeved in the annular groove.

8. The thermocouple according to claim 1, characterized in that The elastic element is a spring.

9. A crystallizer, characterized in that: A thermocouple comprising any one of claims 1 to 8.

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