Replaceable temperature measuring head structure of molten iron temperature measuring probe

Abstract

The utility model discloses a replaceable temperature measuring head structure of a molten iron temperature measuring probe, relates to the field of molten iron temperature measurement, and aims to solve the problems that in the prior art, all parts of the molten iron temperature measuring probe are fixedly connected through screws, so that a thermocouple is troublesome to disassemble after being damaged and is inconvenient to replace quickly. The middle part of the temperature measuring device is fixedly connected with a fixed pipe, the front end of the fixed pipe is connected with a connecting pipe, the interior of the connecting pipe is movably connected with a telescopic pipe, the front end of the telescopic pipe extends out of the front end of the connecting pipe and is connected with a ceramic protection pipe, and the interior of the ceramic protection pipe is fixedly provided with a thermocouple. Through rotation of the first rotating pipe and the second rotating pipe, rapid disassembly and assembly between the temperature measuring device and the connecting pipe and between the ceramic protection pipe and the telescopic pipe can be realized, the replacement efficiency of the thermocouple is remarkably improved, and the problem that disassembly is tedious in a traditional screw fixing mode is solved.

Description

Technical Field

[0001] This utility model relates to the field of molten iron temperature measurement, specifically a replaceable temperature measuring head structure for a molten iron temperature measuring probe. Background Technology

[0002] Molten iron temperature measurement refers to the process of real-time monitoring of the temperature of molten iron using specialized instruments. It is mainly used in industrial fields such as steel smelting and casting. Accurate temperature measurement is crucial for controlling steelmaking composition, optimizing casting processes, and preventing production accidents, directly affecting casting quality and energy efficiency. Due to the extremely high temperature of molten iron (typically reaching 1300℃~1600℃), conventional temperature measurement methods are not applicable, and high-temperature resistant sensors are required.

[0003] For example, patent application CN 208140269 U discloses a contact-type molten iron temperature probe, including a thermocouple, a graphite crucible layer, an adjustment knob, a buzzer, and a display screen. The graphite crucible layer is disposed outside the thermocouple. A telescopic rod connects the adjustment knob and the graphite crucible layer. A protective sleeve is disposed on the telescopic rod near the adjustment knob, and a processor is disposed on the sleeve away from the adjustment knob. A temperature sensor is disposed outside the processor. The advantages are: simpler structural design, easier use, lower manufacturing cost, wider temperature measurement range, higher accuracy and stability due to the contact measurement method, more reliable measurement data, longer service life due to the graphite crucible layer as a protective component for the temperature sensing element, faster temperature measurement speed (advantageous to improve production progress), wider temperature measurement range, greater ease of use, and stronger practicality.

[0004] In the aforementioned technology, all components of the molten iron temperature probe are fixedly connected by screws, making disassembly cumbersome and hindering quick replacement after thermocouple damage. Therefore, there is an urgent market need to develop a replaceable temperature probe structure to help solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a replaceable temperature head structure for a molten iron temperature probe, in order to solve the problem mentioned in the background art that the components of the molten iron temperature probe are fixedly connected by screws, which makes disassembly difficult and inconvenient for quick replacement after the thermocouple is damaged.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a replaceable temperature measuring head structure for a molten iron temperature measuring probe, comprising a temperature measuring device, a fixed tube fixedly connected to the middle of the temperature measuring device, a connecting tube connected to the front end of the fixed tube, a first fixed ring fixedly connected to the rear end of the outer end face of the connecting tube, a first rotating tube rotatably connected to the outer side of the first fixed ring, a telescopic tube movably connected inside the connecting tube, a ceramic protective tube extending from the front end of the telescopic tube beyond the front end of the connecting tube, a second fixed ring fixedly connected to the rear end of the outer end face of the ceramic protective tube, a second rotating tube rotatably connected to the outer side of the second fixed ring, and a thermocouple fixedly installed inside the ceramic protective tube.

[0007] Preferably, a first external thread is fixedly connected to the outer end face of the fixed tube, and a first internal thread is fixedly connected to the inner wall of the first rotating tube. The temperature measuring device and the connecting tube are fixed by the first rotating tube being inserted into the outer side of the fixed tube and threadedly connected by the first external thread and the first internal thread.

[0008] Preferably, rectangular limiting blocks are fixedly connected to both the upper and lower ends of the inner front end of the connecting pipe, and rectangular limiting grooves are provided at both the upper and lower ends of the outer end face of the telescopic pipe, with the two rectangular limiting blocks sliding into the two rectangular limiting grooves respectively.

[0009] Preferably, the outer end of the telescopic tube is fixedly provided with a second external thread, and the inner wall of the second rotating tube is fixedly provided with a second internal thread. The ceramic protective tube and the telescopic tube are connected and fixed by the second rotating tube being sleeved onto the front end of the telescopic tube and threaded together by the second external thread and the second internal thread.

[0010] Preferably, the thermocouple is fixedly connected to a second connecting wire at its rear end. The second connecting wire passes through the inside of the telescopic tube and extends to the rear end of the connecting tube, where a contraction section is provided. The second connecting wire is fixed to the rear end of the telescopic tube by a spliced ​​rubber plunger, which is composed of two semi-circular rubber plungers.

[0011] Preferably, a first connecting wire is fixedly connected to the front end of the temperature measuring device and inside the fixed tube.

[0012] Preferably, the front end of the first connecting line and the rear end of the contraction portion of the second connecting line are connected by a terminal block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, a modular design with threaded connection is adopted. The temperature measuring device and the connecting pipe, the ceramic protective pipe and the telescopic pipe can be quickly disassembled and assembled by rotating the first rotating pipe and the second rotating pipe, which significantly improves the replacement efficiency of the thermocouple and solves the problem of cumbersome disassembly by the traditional screw fixing method.

[0015] (2) In this utility model, the telescopic tube and the connecting tube are connected by a rectangular limiting block and a rectangular limiting groove, which can ensure the stable extension and contraction of the telescopic tube and prevent it from rotating, thus ensuring the positional stability of the thermocouple during the measurement process, and at the same time facilitating the adjustment of the probe's measurement depth.

[0016] (3) In this utility model, the second connecting line is fixed by a splicing rubber plunger and a quick electrical connection is achieved through the wiring terminal, making the replacement of the thermocouple more convenient. At the same time, the design of the shrink part ensures the reliability of the connecting line during the expansion and contraction process, and avoids damage to the line due to frequent expansion and contraction. Attached Figure Description

[0017] Figure 1 This is a front view of the replaceable temperature measuring head structure of a molten iron temperature measuring probe according to the present invention.

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a detailed enlarged view of part A of the present invention;

[0020] Figure 4 This is a detailed enlarged view of part B of this utility model.

[0021] In the diagram: 1. Temperature measuring device; 101. Fixed tube; 102. First external thread; 103. First connecting wire; 2. Connecting tube; 201. First fixing ring; 202. First rotating tube; 203. First internal thread; 204. Rectangular limiting block; 3. Telescopic tube; 301. Rectangular limiting groove; 302. Second external thread; 303. Assembled rubber plunger; 4. Ceramic protective tube; 401. Second fixing ring; 402. Second rotating tube; 403. Second internal thread; 5. Thermocouple; 501. Second connecting wire; 502. Contraction part; 503. Terminal block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4This utility model provides an embodiment of a replaceable temperature measuring head structure for a molten iron temperature measuring probe, comprising a temperature measuring device 1, a fixed tube 101 fixedly connected to the middle of the temperature measuring device 1, a connecting tube 2 connected to the front end of the fixed tube 101, a first fixed ring 201 fixedly connected to the rear end of the outer end face of the connecting tube 2, a first rotating tube 202 rotatably connected to the outer side of the first fixed ring 201, a telescopic tube 3 movably connected inside the connecting tube 2, the front end of the telescopic tube 3 extending out of the front end of the connecting tube 2 and connected to a ceramic protective tube 4, a second fixed ring 401 fixedly connected to the rear end of the outer end face of the ceramic protective tube 4, a second rotating tube 402 rotatably connected to the outer side of the second fixed ring 401, a thermocouple 5 fixedly installed inside the ceramic protective tube 4, and a first external thread fixedly connected to the outer end face of the fixed tube 101. 102. A first internal thread 203 is fixedly connected to the inner wall of the first rotating tube 202. The temperature measuring device 1 and the connecting tube 2 are fixed by the first rotating tube 202 being inserted into the outside of the fixed tube 101 and threaded together with the first external thread 102 and the first internal thread 203. A second external thread 302 is fixedly provided at the front end of the outer end of the telescopic tube 3. A second internal thread 403 is fixedly provided on the inner wall of the second rotating tube 402. The ceramic protective tube 4 and the telescopic tube 3 are fixed by the second rotating tube 402 being inserted into the front end of the telescopic tube 3 and threaded together with the second external thread 302 and the second internal thread 403. By rotating the first rotating tube 202 and the second rotating tube 402, the temperature measuring device 1 and the connecting tube 2, and the telescopic tube 3 and the ceramic protective tube 4 can be separated.

[0024] Please see Figure 2 and Figure 3 Rectangular limiting blocks 204 are fixedly connected to the upper and lower ends of the inner front end of the connecting pipe 2. Rectangular limiting grooves 301 are provided at the upper and lower ends of the outer end face of the telescopic pipe 3. The two rectangular limiting blocks 204 slide into the two rectangular limiting grooves 301 respectively, so that the telescopic pipe 3 can extend forward from the inside of the connecting pipe 2. The rotation of the telescopic pipe 3 is restricted by the sliding of the rectangular limiting blocks 204 along the rectangular limiting grooves 301.

[0025] Please see Figure 2 and Figure 4A second connecting wire 501 is fixedly connected to the rear end of thermocouple 5. The second connecting wire 501 passes through the inside of telescopic tube 3 and extends to the rear end of connecting tube 2, where a contraction section 502 is provided. The second connecting wire 501 is fixed to the rear end of telescopic tube 3 by a splicing rubber plunger 303, which is composed of two semi-circular rubber plungers. During installation, the two semi-circular rubber plungers are used to clamp the second connecting wire 501 and then inserted into the rear end of telescopic tube 3 to fix the second connecting wire 501 to the telescopic tube 3. A first connecting wire 103 is fixedly connected to the front end of temperature measuring device 1 inside fixed tube 101. The front end of the first connecting wire 103 is connected to the second connecting wire 501. The rear ends of the contraction section 502 of the thermocouple 1 are connected by a terminal 503, which makes the temperature measuring device 1 and the thermocouple 5 electrically connected. When the telescopic tube 3 is extended or retracted, the stability of the connection is ensured by the movement of the contraction section 502. When the thermocouple 5 needs to be replaced, the temperature measuring device 1 is separated from the connecting tube 2, the terminal 503 is disconnected, and the contraction section 502 is pulled to move the assembled rubber plunger 303 out of the rear end of the telescopic tube 3. The assembled rubber plunger 303 can then be separated from the second connecting line 501. Then the telescopic tube 3 and the ceramic protective tube 4 are separated, and the second connecting line 501 is pulled out of the telescopic tube 3, so that the thermocouple 5 can be replaced.

[0026] Working Principle: In use, thermocouple 5 is first inserted into molten iron through ceramic protective tube 4 for temperature measurement. Thermocouple 5 transmits the temperature signal to temperature measuring device 1 via the second connecting line 501. When thermocouple 5 needs to be replaced, rotate the first rotating tube 202 to separate it from the fixed tube 101, disconnecting the terminal 503. Then, pull the telescopic tube 3 forward to remove the assembled rubber plunger 303, separating the second connecting line 501 from the telescopic tube 3. Next, rotate the second rotating tube 402 to detach the ceramic protective tube 4 from the telescopic tube 3, allowing the old thermocouple 5 to be removed. When installing a new thermocouple 5, the operation is reversed: pass the second connecting line 501 of the new thermocouple 5 through the telescopic tube 3, fix it with the assembled rubber plunger 303, connect the terminal 503, and then tighten the second rotating tube 402 and the first rotating tube 202 in sequence to complete the quick replacement. The telescopic tube 3 achieves stable extension and retraction through the cooperation of the rectangular limiting block 204 and the rectangular limiting groove 301, ensuring structural stability during measurement. This design enables rapid disassembly and replacement of thermocouples through modular threaded connections and a retractable structure.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A replaceable temperature measuring head structure of a molten iron temperature measuring probe, comprising a temperature measuring device (1), characterized in that: The temperature measuring device (1) is fixedly connected to a fixed tube (101) in the middle. The front end of the fixed tube (101) is connected to a connecting tube (2). The rear end of the outer end face of the connecting tube (2) is fixedly connected to a first fixed ring (201). The outer side of the first fixed ring (201) is rotatably connected to a first rotating tube (202). The connecting tube (2) is movably connected to a telescopic tube (3). The front end of the telescopic tube (3) extends out of the front end of the connecting tube (2) and is connected to a ceramic protective tube (4). The rear end of the outer end face of the ceramic protective tube (4) is fixedly connected to a second fixed ring (401). The outer side of the second fixed ring (401) is rotatably connected to a second rotating tube (402). The ceramic protective tube (4) is fixedly equipped with a thermocouple (5).

2. The replaceable temperature measuring head structure of a molten iron temperature measuring probe according to claim 1, characterized in that: The outer end face of the fixed tube (101) is fixedly connected to a first external thread (102), and the inner wall of the first rotating tube (202) is fixedly connected to a first internal thread (203). The temperature measuring device (1) and the connecting tube (2) are fixedly connected by the first rotating tube (202) being inserted into the outer side of the fixed tube (101) and by the first external thread (102) and the first internal thread (203) being threaded together.

3. The replaceable temperature measuring head structure of a molten iron temperature measuring probe according to claim 1, characterized in that: The upper and lower ends of the inner front end of the connecting pipe (2) are fixedly connected with rectangular limiting blocks (204), and the upper and lower ends of the outer end face of the telescopic pipe (3) are provided with rectangular limiting grooves (301). The two rectangular limiting blocks (204) slide into the two rectangular limiting grooves (301) respectively.

4. The replaceable temperature measuring head structure of a molten iron temperature measuring probe according to claim 1, characterized in that: The telescopic tube (3) has a second external thread (302) fixedly provided on the front end of its outer side, and the second rotating tube (402) has a second internal thread (403) fixedly provided on its inner wall. The ceramic protective tube (4) and the telescopic tube (3) are connected and fixed by the second rotating tube (402) being inserted into the front end of the telescopic tube (3) and the second external thread (302) and the second internal thread (403).

5. The replaceable temperature measuring head structure of a molten iron temperature measuring probe according to claim 1, characterized in that: The thermocouple (5) is fixedly connected to a second connecting line (501) at its rear end. The second connecting line (501) passes through the inside of the telescopic tube (3) and extends to the rear end of the inside of the connecting tube (2) and is provided with a contraction part (502). The second connecting line (501) is fixed to the rear end of the inside of the telescopic tube (3) by a spliced ​​rubber plunger (303). The spliced ​​rubber plunger (303) is composed of two semi-circular rubber plungers spliced ​​together.

6. The replaceable temperature measuring head structure of a molten iron temperature measuring probe according to claim 5, characterized in that: The temperature measuring device (1) has a first connecting line (103) fixedly connected to its front end and inside the fixed tube (101).

7. The replaceable temperature measuring head structure of the molten iron temperature measuring probe according to claim 6, characterized in that: The front end of the first connecting line (103) is connected to the rear end of the contraction portion (502) of the second connecting line (501) via a terminal block (503).

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