Thermocouple damage early warning device

Abstract

The utility model discloses a thermocouple damage early warning device, which comprises a protective cylinder sleeved outside a thermocouple, one side of the protective cylinder is provided with an installation disc, one side of the installation disc close to the protective cylinder is fixedly provided with at least two guide columns, and the guide columns are provided with lantern rings located on the periphery of the protective cylinder. The sleeve ring is externally connected with a positive electrode or a negative electrode of a power supply, the protective cylinder is connected with the other electrode of the power supply, and the alarm lamp is connected with the sleeve ring, the protective cylinder and the power supply in series. The thermocouple is placed in the protection cylinder, the protection cylinder is fixed on the equipment needing temperature measurement through the installation disc and is also used for positioning the thermocouple, when the vibration of the equipment needing temperature measurement is large, the protection cylinder and the thermocouple in the protection cylinder are polarized with the installation disc as one point, and when the protection cylinder continuously touches the lantern ring in the polarization process, the thermocouple can be positioned through the installation disc. At the moment, the current is switched on, the alarm lamp is lightened to remind external personnel that the internal thermocouple and the protective cylinder are easy to break and damage due to overlarge shaking amplitude.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouples, and specifically comprises a thermocouple damage early warning device. Background Art

[0002] In the field of thermocouples, accurate temperature measurement plays a vital role in numerous industrial and scientific research applications, particularly in materials processing, environmental protection, medical technology, and remote sensing. Based on the working principle of thermocouples, which generates a voltage through the temperature difference between the two ends of a material, thermocouples are widely used for temperature detection in various high and low temperature environments.

[0003] However, due to the extremely high temperatures in the operating environment, the thermocouple core and thermoelectrode of the thermocouple will become soft under high temperature conditions, and the mechanical strength will decrease accordingly. This can easily cause the thermoelectrode end to break or fall off due to vibration or mechanical stress, affecting the measurement accuracy and the continuous operation of the equipment. This problem is particularly prominent in industrial environments with high vibration, such as rotary kilns. Frequent damage greatly increases the maintenance cost and replacement frequency of the thermocouple, resulting in significant economic losses. Utility Model Content

[0004] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present invention is to provide a thermocouple damage warning device, which provides an early warning when the thermocouple is about to be damaged, thereby reducing safety hazards and equipment failures caused by thermocouple damage.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thermocouple damage warning device, comprising a protective tube sleeved on the outside of the thermocouple, a mounting plate provided on one side of the protective tube, at least two guide posts fixedly mounted on the side of the mounting plate close to the protective tube, a collar provided on the guide post and located on the circumference of the protective tube, the axis of the collar coincides with the axis of the protective tube, the collar is connected to the positive or negative pole of an external power supply, the protective tube is connected to the other pole of the power supply, and also includes an alarm light connected in series with the collar, the protective tube and the power supply.

[0006] According to one embodiment of the present invention, the collar is slidably arranged on the guide post, a through hole for the guide post to pass through is provided on the collar, and a locking piece for keeping the collar and the guide post relatively stationary is provided on the collar.

[0007] According to one embodiment of the present invention, a retaining ring is fixedly mounted on a side of the guide post away from the mounting plate, and the collar slides between the retaining ring and the mounting plate.

[0008] According to one embodiment of the present utility model, the locking member includes a clamping ring rotatably mounted on a collar, the clamping ring is provided with an arc-shaped waist hole for the guide column to pass through, the guide column peripheral side surface is provided with a plurality of annular grooves along the axial direction of the guide column, and the clamping ring is provided with a positioning member for keeping the clamping ring and the collar relatively stationary. When the clamping ring and the collar are relatively stationary, the clamping ring is embedded in the annular groove.

[0009] According to one embodiment of the present invention, the positioning member includes a positioning pin fixedly mounted on the clamping ring, and a positioning hole for inserting the positioning pin is formed on the collar.

[0010] According to one embodiment of the present invention, the positioning pin is provided with a spring for driving the positioning pin to be inserted into the positioning hole.

[0011] According to one embodiment of the present invention, an insulating layer is provided between the inner wall of the protection tube and the thermocouple.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the thermocouple is placed in the protective tube, and the protective tube is fixed to the equipment that needs to be temperature measured through the mounting plate, which also positions the thermocouple. When the vibration of the equipment to be temperature measured is large, the protective tube and the thermocouple inside it will also be polarized with the mounting plate as a point. When the protective tube continuously touches the ring during the polarization process, the current is connected and the alarm light is on to remind outsiders that the internal thermocouple and the protective tube are prone to breakage and damage due to excessive shaking, which effectively reduces the safety hazards and equipment failures caused by damage to the thermocouple. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is an expanded view of the overall structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the collar and the clamping ring of the utility model;

[0016] Figure 4 For this utility model Figure 3 A partial enlarged schematic diagram of the structure at center A;

[0017] Figure 5 This is a schematic diagram of the positioning member structure of the present utility model.

[0018] In the figure: 1. Protective tube; 2. Mounting plate; 3. Guide column; 4. Ring; 41. Through hole; 42. Locking piece; 421. Retaining ring; 422. Arc waist hole; 423. Annular groove; 424. Positioning piece; 425. Positioning pin; 426. Positioning hole; 427. Spring; 43. Retaining ring; 5. Warning light; 6. Insulation layer. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Thermocouples are common temperature sensors primarily used for measuring temperature in high-temperature environments. Under high-temperature conditions, the thermocouple core and thermocouple electrodes become pliable due to the high temperature, which reduces their mechanical strength. Under these conditions, thermocouples are prone to breakage and detachment, disrupting the normal operation of production equipment. Because thermocouples are typically made of precious metals, frequent damage can result in significant economic losses. This problem is particularly acute in high-vibration industrial environments like rotary kilns, where frequent mechanical vibrations accelerate thermocouple damage.

[0021] See also Figure 1 In order to solve the above technical problems, this embodiment discloses a thermocouple damage warning device, comprising a protective tube 1 sleeved on the outside of the thermocouple, a mounting plate 2 provided on one side of the protective tube 1, at least two guide posts 3 fixedly mounted on the side of the mounting plate 2 close to the protective tube 1, a collar 4 provided on the guide posts 3 and located around the protective tube 1, the axis of the collar 4 coinciding with the axis of the protective tube 1, the collar 4 being connected to the positive or negative pole of an external power supply, and the protective tube 1 being connected to the other pole of the power supply, and an alarm light 5 connected in series with the collar 4, the protective tube 1, and the power supply.

[0022] The thermocouple is placed in the protective tube 1, and the protective tube 1 is fixed to the equipment that needs to be temperature measured through the mounting plate 2, which also positions the thermocouple. The protective tube 1 and the collar 4 are respectively connected to the positive and negative poles of the power supply. When the vibration of the temperature-measured equipment is large, the protective tube 1 and the thermocouple inside it will also be polarized (that is, the shaking amplitude) with the mounting plate 2 as a point. The farther away from the mounting plate 2, the greater the polarization amplitude. When the protective tube 1 continuously touches the collar 4 during the polarization process, the current is connected, and current will flow through the alarm light 5, thereby triggering the alarm light 5 connected in series with the collar 4, the protective tube 1 and the power supply to light up, reminding outsiders that the internal thermocouple and the protective tube 1 are prone to breakage and damage due to excessive shaking amplitude, and timely reminding staff to perform maintenance, effectively reducing safety hazards and equipment failures caused by thermocouple damage.

[0023] See also Figure 2To minimize the impact of current flowing through the protective tube 1 on the thermocouple's temperature measurement, an insulating layer 6 is provided between the inner wall of the protective tube 1 and the thermocouple. This effectively prevents electrical connection between the inner wall of the protective tube 1 and the thermocouple, thereby avoiding short circuits or interference that could occur due to direct contact between the thermocouple and the protective tube 1. This ensures that the thermocouple can accurately and stably measure temperature, improving measurement reliability and accuracy.

[0024] Under high temperature conditions, the thermocouple and the protective tube 1 will become soft, and their mechanical strength will decrease accordingly. At different temperatures, the degree of softness of the thermocouple and the protective tube 1 is different. Sometimes, when the temperature is low, the mechanical strength of the thermocouple and the protective tube 1 is high, the rigidity is large, and the shaking amplitude is small. Under the condition that the distance between the protective tube 1 and the collar 4 remains unchanged, if the collar 4 is still on the side close to the mounting plate 2, its detection sensitivity is low, and it should be placed on the side away from the mounting plate 2 to improve its detection sensitivity.

[0025] When the temperature is high, the mechanical strength of the thermocouple and the protective tube 1 is low and they are softer, and the vibration amplitude they can accept is also larger. At this time, the ring 4 should be placed on the side close to the mounting plate 2 to prevent the protective tube 1 from accidentally touching the ring 4 due to the large vibration amplitude.

[0026] See also Figure 1 、 Figure 3 and Figure 4 In order to facilitate the movement of the collar 4 outside the protective tube 1, the collar 4 is slidably arranged on the guide post 3, and a through hole 41 for the guide post 3 to pass through is opened on the collar 4. A locking piece 42 is provided on the collar 4 for keeping the collar 4 and the guide post 3 relatively stationary.

[0027] The collar 4 is slidably arranged on the guide post 3, and a through hole 41 is opened on the collar 4 to allow the guide post 3 to pass through. A lock 42 is provided to keep the collar 4 and the guide post 3 relatively still, thereby achieving the effect of the collar 4 sliding flexibly on the guide post 3 without being separated from the guide post 3, ensuring stability and safety during use, and allowing the collar 4 to move outside the protective tube 1, which is convenient for detection and improves detection accuracy.

[0028] See also Figure 1 , to prevent the collar 4 from sliding out of the guide post 3. A retaining ring 43 is fixedly installed on one side of the guide post 3 away from the mounting plate 2, and the collar 4 slides between the retaining ring 43 and the mounting plate 2.

[0029] See also Figure 1 、 Figure 3 and Figure 4The locking member 42 specifically includes a collar 421 rotatably mounted on the collar 4. The collar 421 is provided with an arc-shaped waist hole 422 for the guide post 3 to pass through. A plurality of annular grooves 423 are provided on the side surface of the guide post 3 along the axial direction of the guide post 3. A positioning member 424 is provided on the collar 421 for keeping the collar 421 and the collar 4 relatively stationary. When the collar 421 and the collar 4 are relatively stationary, the collar 421 is embedded in the annular groove 423.

[0030] The working principle of this locking member 42 is that when the clamping ring 421 and the collar 4 are relatively stationary, the clamping ring 421 is embedded in the annular groove 423, so that the collar 4 and the guide column 3 are relatively stationary, thereby realizing the positioning of the collar 4. Specifically, when it is necessary to move the collar 4 on the guide column 3, the positioning member 424 is first used to contact the relative stationary state of the clamping ring 421 and the collar 4, and the clamping ring 421 can rotate relative to the collar 4. The clamping ring 421 is rotated to disengage the annular groove 423. At this time, the collar 4 can slide relative to the guide column 3. When it moves to the desired position, the clamping ring 421 rotates relative to the collar 4 and is embedded in other annular grooves 423 on the guide column 3 again, making it difficult for the collar 4 to move relative to the guide column 3. Then, the positioning member 424 is used to keep the clamping ring 421 stationary relative to the collar 4, thereby completing the movement of the collar 4.

[0031] See also Figure 4 and Figure 5 The positioning member 424 includes a positioning pin 425 fixedly mounted on the collar 421 , and a positioning hole 426 for inserting the positioning pin 425 is provided on the collar 4 .

[0032] By cooperating the positioning pin 425 fixedly mounted on the collar 421 with the positioning hole 426 provided on the collar 4 , accurate positioning and fixing functions can be achieved. When the positioning pin 425 is disengaged from the positioning hole 426 , the collar 421 can rotate relative to the collar 4 .

[0033] See also Figure 5 The positioning pin 425 is provided with a spring 427 for driving the positioning pin 425 to insert into the positioning hole 426. Thus, the positioning pin 425 does not easily escape from the positioning hole 426, reducing the probability of autonomous separation.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A thermocouple damage warning device, comprising a protective tube (1) sleeved on the outside of the thermocouple, a mounting plate (2) being provided on one side of the protective tube (1), at least two guide posts (3) being fixedly mounted on a side of the mounting plate (2) close to the protective tube (1), a collar (4) being provided on the guide posts (3) and located on the circumference of the protective tube (1), the axis of the collar (4) coinciding with the axis of the protective tube (1), the collar (4) being connected to the positive or negative pole of an external power supply, the protective tube (1) being connected to the other pole of the power supply, and an alarm light (5) being connected in series with the collar (4), the protective tube (1) and the power supply.

2. The thermocouple damage warning device according to claim 1, characterized in that: The collar (4) is slidably arranged on the guide post (3), a through hole (41) for the guide post (3) to pass through is provided on the collar (4), and a locking member (42) for keeping the collar (4) and the guide post (3) relatively stationary is provided on the collar (4).

3. The thermocouple damage warning device according to claim 2, characterized in that: A retaining ring (43) is fixedly mounted on the side of the guide column (3) away from the mounting plate (2), and the collar (4) slides between the retaining ring (43) and the mounting plate (2).

4. The thermocouple damage warning device according to claim 3, characterized in that: The locking member (42) comprises a clamping ring (421) rotatably mounted on the collar (4); an arc-shaped waist hole (422) for the guide column (3) to pass through is provided on the clamping ring (421); a plurality of annular grooves (423) are provided on the peripheral side surface of the guide column (3) along the axial direction of the guide column (3); a positioning member (424) is provided on the clamping ring (421) for keeping the clamping ring (421) and the collar (4) relatively stationary; when the clamping ring (421) and the collar (4) are relatively stationary, the clamping ring (421) is embedded in the annular groove (423).

5. The thermocouple damage warning device according to claim 4, characterized in that: The positioning member (424) includes a positioning pin (425) fixedly mounted on the clamping ring (421), and a positioning hole (426) for inserting the positioning pin (425) is provided on the collar (4).

6. The thermocouple damage warning device according to claim 5, characterized in that: The positioning pin (425) is provided with a spring (427) for driving the positioning pin (425) to insert into the positioning hole (426).

7. The thermocouple damage warning device according to claim 1, characterized in that: An insulating layer (6) is provided between the inner wall of the protection tube (1) and the thermocouple.

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