Split type thermocouple with replaceable probe

Abstract

The utility model relates to the technical field of temperature measuring elements, and discloses a split thermocouple with a replaceable probe, which comprises a protective shell, a thermocouple head is fixedly connected to the bottom of the protective shell, a fixing mechanism is mounted at the top of the protective shell, a telescopic mechanism is mounted on the outer side of the protective shell, and a temperature measuring assembly is mounted in the protective shell. The fixing mechanism comprises a limiting assembly, a sealing assembly and a fixing assembly, the fixing assembly comprises a fixing seat, the fixing seat is slidably connected to the outer side of the protective shell, a connecting wire is fixedly connected to the top of the fixing seat, and a fixing groove is formed in the bottom of the fixing seat. According to the utility model, through mutual cooperation of the limiting rod, the limiting hole, the sealing groove, the sealing strip, the fixing groove, the fixing seat and other structures, when the thermocouple probe is damaged, the thermocouple probe can be rapidly maintained and replaced, so that the measuring instrument can work normally.

Description

Technical Field

[0001] This utility model relates to the field of temperature measuring element technology, and in particular to a thermocouple with a split-type replaceable probe. Background Technology

[0002] A thermocouple is a temperature sensor based on the Seebeck effect. It consists of two different metal conductors connected in a circuit. When there is a temperature difference between the two ends, a thermoelectric electromotive force proportional to the temperature difference is generated in the circuit, thereby realizing the measurement of temperature. Its core function is to convert the temperature change, which is a non-electrical quantity, into a measurable electrical signal. It has the characteristics of not requiring external power supply, high temperature resistance, fast response, and simple structure. It is widely used in temperature monitoring in high-temperature or complex environments such as industrial furnace temperature, engine exhaust, and scientific experiments.

[0003] Existing thermocouples typically consist of a protective shell, two different types of wires, a cold junction, and connecting wires. The protective shell protects the two different types of wires, giving them higher strength and corrosion resistance. The wires transfer temperature to the cold junction, and the cold junction and connecting wires transmit the thermoelectric potential signal to the measuring instrument for viewing.

[0004] However, existing thermocouple probes are prone to failure, which prevents them from transmitting thermoelectric potential to the cold junction, thus preventing the measuring instrument from measuring the temperature. In this case, the thermocouple probe needs to be replaced. However, existing thermocouple probes are often fixed by threads and welding, which leads to excessively long repair times when the probe is damaged, making it impossible for the measuring instrument to measure the stability in a timely manner. Therefore, a split-type thermocouple with a replaceable probe is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a split-type replaceable probe thermocouple, which aims to improve the problem that existing thermocouple probes are usually fixed by threads and welding, resulting in the inability to quickly repair or replace the probe when it is damaged.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A split-type replaceable probe thermocouple includes a protective shell, a thermocouple head fixedly connected to the bottom of the protective shell, a fixing mechanism installed on the top of the protective shell, a telescopic mechanism installed on the outside of the protective shell, and a temperature measuring component installed inside the protective shell.

[0008] The fixing mechanism includes a limiting component, a sealing component, and a fixing component. The fixing component includes a fixing seat, which is slidably connected to the outside of the protective shell. A connecting line is fixedly connected to the top of the fixing seat, and a fixing groove is provided at the bottom of the fixing seat.

[0009] As a further description of the above technical solution:

[0010] The sealing assembly includes a sealing strip, which is fixedly connected to the top of the protective shell. A sealing groove is provided at the bottom of the fixing base, and the sealing strip and the sealing groove are interlocked with each other.

[0011] As a further description of the above technical solution:

[0012] The limiting component includes a limiting rod, which is slidably connected to the outside of the fixed base. A limiting hole is opened on the outside of the protective shell. The limiting rod and the limiting hole are engaged with each other. A spring is provided inside the fixed base.

[0013] As a further description of the above technical solution:

[0014] The telescopic mechanism includes a connecting component, a limiting component, and a fixing component. The connecting component includes a connecting block, which is fixedly connected to the outside of the protective shell. A telescopic block is slidably connected inside the connecting block.

[0015] As a further description of the above technical solution:

[0016] The limiting component includes a mounting base, which is fixedly connected to the bottom of the telescopic block, and the mounting base has a mounting hole on its outer side;

[0017] As a further description of the above technical solution:

[0018] The fixing component includes a positioning rod, which is slidably connected to the outside of the connecting block. A positioning hole is provided on the outside of the telescopic block. The positioning rod and the positioning hole are engaged with each other. A spring is provided inside the connecting block.

[0019] As a further description of the above technical solution:

[0020] A first conductor is fixedly connected inside the protective shell, and a second conductor is fixedly connected inside the protective shell.

[0021] As a further description of the above technical solution:

[0022] The bottom of the fixing base has a connecting hole, and the outer side of the fixing base has a sliding groove.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the thermocouple probe can be quickly replaced by the cooperation of the limiting rod, limiting hole, sealing groove, sealing strip, fixing groove, fixing seat and other structures. This allows for quick repair and replacement when the thermocouple probe is damaged, so that the measuring instrument can work normally.

[0025] 2. In this utility model, the detection range of the thermocouple probe is adjusted by the cooperation of the connecting block, telescopic block, positioning rod, positioning hole, mounting base, mounting hole and other structures, thereby making the temperature detection of the thermocouple probe more convenient. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a split-type replaceable probe thermocouple proposed in this utility model.

[0027] Figure 2 This is a cross-sectional schematic diagram of a protective shell for a split-type replaceable probe thermocouple proposed in this utility model.

[0028] Figure 3 This is a cross-sectional schematic diagram of the sealing groove of a split-type replaceable probe thermocouple proposed in this utility model.

[0029] Figure 4 This is a cross-sectional schematic diagram of a mounting base for a split-type replaceable probe thermocouple proposed in this utility model.

[0030] Figure 5 This is a cross-sectional schematic diagram of the connection block of a split-type replaceable probe thermocouple proposed in this utility model.

[0031] Legend:

[0032] 1. Coupler head; 2. Protective shell; 3. Fixing base; 4. Fixing groove; 5. Sealing strip; 6. Sealing groove; 7. First conductor; 8. Second conductor; 9. Connecting hole; 10. Connecting wire; 11. Connecting block; 12. Telescopic block; 13. Mounting base; 14. Mounting hole; 15. Positioning hole; 16. Positioning rod; 17. Spring one; 18. Limiting hole; 19. Limiting rod; 20. Spring two; 21. Slide groove. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figure 1 , Figure 3 and Figure 4 This utility model provides an embodiment of a split-type replaceable probe thermocouple, including a protective shell 2. A thermocouple head 1 is fixedly connected to the bottom of the protective shell 2. The protective shell 2 provides protection, which improves the strength and corrosion resistance of the thermocouple. The thermocouple head 1 detects the temperature, and the thermocouple transmits the thermoelectric potential signal to a measuring instrument for observation. A fixing mechanism is installed on the top of the protective shell 2 to fix the thermocouple probe, preventing displacement during operation and allowing for quick probe replacement. A telescopic mechanism is installed on the outside of the protective shell 2, which allows the detection range of the thermocouple probe to be adjusted, making temperature detection more convenient. A temperature measuring component is installed inside the protective shell 2 to measure the temperature, and the measured thermoelectric potential signal is transmitted to a measuring instrument for observation.

[0035] The fixing mechanism includes a limiting component, a sealing component, and a fixing component. The fixing component includes a fixing seat 3, which is slidably connected to the outside of the protective shell 2. A connecting line 10 is fixedly connected to the top of the fixing seat 3. The fixing seat 3 provides a fixing effect for the protective shell 2, preventing displacement during operation. The fixing seat 3 also provides support for the connecting line 10, ensuring its stable operation. The connecting line 10 transmits the thermoelectric potential signal to a measuring instrument for observation. A fixing groove 4 is provided at the bottom of the fixing seat 3, which limits the movement of the protective shell 2 and prevents displacement during operation. The sealing component includes a sealing strip 5, which is fixedly connected to the top of the protective shell 2. A sealing groove 6 is provided at the bottom of the fixing seat 3. The sealing strip 5 and the sealing groove 6 interlock, forming a sealing groove. The seal 5 and the sealing groove 6 work together to seal the connection between the protective shell 2 and the fixed base 3, preventing external dust and other debris from affecting the thermocouple. The limiting component includes a limiting rod 19, which is slidably connected to the outside of the fixed base 3. A limiting hole 18 is opened on the outside of the protective shell 2. The limiting rod 19 and the limiting hole 18 are engaged with each other. A second spring 20 is installed inside the fixed base 3. The limiting rod 19 and the limiting hole 18 work together to fix the protective shell 2 and prevent it from shifting during operation. The second spring 20 allows the limiting rod 19 to return to its original position after movement. Through the cooperation between the various structures of the fixing mechanism, the thermocouple probe is fixed, allowing for quick repair and replacement when the probe is damaged.

[0036] Reference Figure 1 , Figure 3 and Figure 5The telescopic mechanism includes a connecting component, a limiting component, and a fixing component. The connecting component includes a connecting block 11, which is fixedly connected to the outside of the protective shell 2. A telescopic block 12 is slidably connected inside the connecting block 11. The cooperation between the connecting block 11 and the telescopic block 12 allows for adjustment of the detection range of the thermocouple probe, making temperature detection convenient and accurate. The limiting component includes a mounting base 13, which is fixedly connected to the bottom of the telescopic block 12. A mounting hole 14 is provided on the outside of the mounting base 13. The cooperation between the mounting base 13 and the mounting hole 14 achieves a fixed effect on the thermocouple, preventing displacement when the detection is stable. The fixing component includes a positioning rod 16, which is slidably connected to the outside of the connecting block 11. A positioning hole 15 is provided on the outside of the telescopic block 12. The positioning rod 16 and the positioning hole 15... 5. The connecting block 11 is interlocked with the telescopic block 12. The positioning rod 16 and the positioning hole 15 cooperate to fix the telescopic block 12, so that the adjusted detection range can be fixed. The connecting block 11 provides support for the positioning rod 16 so that it can operate stably. The spring 17 allows the positioning rod 16 to be reset after movement. The first conductor 7 and the second conductor 8 are fixedly connected inside the protective shell 2. The temperature is converted into a thermoelectric potential signal through the cooperation of the first conductor 7 and the second conductor 8 and transmitted to the measuring instrument to observe the stable height. The bottom of the fixed base 3 is provided with a connecting hole 9 and the outside of the fixed base 3 is provided with a sliding groove 21. The connecting hole 9 and the conductor are connected to transmit the thermoelectric potential signal. The sliding groove 21 allows the limiting rod 19 to move in the fixed base 3.

[0037] Working principle: When the thermocouple probe malfunctions, pulling the pull ring moves the limiting rod 19, disengaging it from the limiting hole 18 and releasing the locking of the protective shell 2. Then, pulling the protective shell 2 disengages it from the fixing groove 4 of the fixing seat 3, allowing the thermocouple probe to be replaced. After replacement, the protective shell 2 is inserted into the fixing groove 4, causing the first conductor 7 and the second conductor 8 to engage with the connection hole 9 of the fixing seat 3, and the sealing strip 5 to engage with the sealing groove 6, thus sealing the connection between the protective shell 2 and the fixing seat 3. At this point, the limiting rod 19 is released, and the spring 20 pushes it back to its original position, resetting it to engage with the limiting rod 18. The protective shell 2 is fixed by engaging the hole 18, and the thermocouple probe is now installed. When the detection range of the thermocouple probe needs to be adjusted, the positioning rod 16 can be moved by pulling the pull ring to disengage it from the positioning hole 15. At this time, the telescopic block 12 can be slid inside the connecting block 11 by pulling the mounting base 13, thereby adjusting the detection range of the probe. When the required range is reached, the positioning rod 16 is released, and the spring 17 pushes it to re-engage with the positioning hole 15, thereby fixing the telescopic block 12. The thermocouple can then be fixed by the mounting base 13 and the mounting hole 14, allowing it to detect temperature.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A split replaceable probe thermocouple comprising a protective casing (2), characterised in that: The bottom of the protective shell (2) is fixedly connected with a couplet (1), the top of the protective shell (2) is provided with a fixing mechanism, the outer side of the protective shell (2) is provided with an extension mechanism, and the inside of the protective shell (2) is provided with a temperature measuring assembly; The fixing mechanism comprises a limiting assembly, a sealing assembly and a fixing assembly, the fixing assembly comprises a fixing seat (3), the fixing seat (3) is slidably connected to the outer side of the protective shell (2), the top of the fixing seat (3) is fixedly connected with a connecting line (10), and the bottom of the fixing seat (3) is provided with a fixing groove (4).

2. The split probe replaceable thermocouple of claim 1, wherein: The sealing assembly comprises a sealing strip (5), the sealing strip (5) is fixedly connected to the top of the protective shell (2), the bottom of the fixing seat (3) is provided with a sealing groove (6), and the sealing strip (5) and the sealing groove (6) are clamped with each other.

3. A split replaceable probe thermocouple according to claim 2, wherein: The limiting assembly comprises a limiting rod (19), the limiting rod (19) is slidably connected to the outer side of the fixing seat (3), the outer side of the protective shell (2) is provided with a limiting hole (18), the limiting rod (19) and the limiting hole (18) are clamped with each other, and the inside of the fixing seat (3) is provided with a spring (20).

4. A split probe replaceable thermocouple as defined in claim 3, wherein: The extension mechanism comprises a connecting assembly, a limiting assembly and a fixing assembly, the connecting assembly comprises a connecting block (11), the connecting block (11) is fixedly connected to the outer side of the protective shell (2), and the inside of the connecting block (11) is slidably connected with an extension block (12).

5. A split probe replaceable thermocouple according to claim 4, wherein: The limiting assembly comprises a mounting seat (13), the mounting seat (13) is fixedly connected to the bottom of the extension block (12), and the outer side of the mounting seat (13) is provided with a mounting hole (14).

6. A split probe replaceable thermocouple as defined in claim 5, wherein: The fixing assembly comprises a positioning rod (16), the positioning rod (16) is slidably connected to the outer side of the connecting block (11), the outer side of the extension block (12) is provided with a positioning hole (15), the positioning rod (16) and the positioning hole (15) are clamped with each other, and the inside of the connecting block (11) is provided with a spring (17).

7. The split probe replaceable thermocouple of claim 1, wherein: The inside of the protective shell (2) is fixedly connected with a first conductor (7), and the inside of the protective shell (2) is fixedly connected with a second conductor (8).

8. The split probe replaceable thermocouple of claim 1, wherein: The bottom of the fixing seat (3) is provided with a connecting hole (9), and the outer side of the fixing seat (3) is provided with a sliding groove (21).

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