Temperature detection device for fiber heat treatment

Abstract

The utility model relates to the technical field of fiber heat treatment, and particularly discloses a temperature detection device for fiber heat treatment. Comprising a thermode, a junction box connected with one end of the thermode, a protective sleeve which sleeves the thermode and transmits the surface temperature of a heating drying tunnel to the thermode, and a clamping assembly which is connected with one end, far away from the junction box, of the protective sleeve and is clamped on the outer side of the heating drying tunnel; the clamping assembly is located at the end, away from the junction box, of the thermode. According to the utility model, through the arrangement of the protective sleeve, the insulating material protection and heat transfer effects are realized; according to the utility model, the clamping assembly is used for fixing the thermocouple and increasing the heat transfer area, so that the monitoring precision is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of fiber heat treatment, and more particularly to a temperature detection device for fiber heat treatment. Background Art

[0002] Aramid III fiber (heterocyclic aramid) refers to a type of para-aramid fiber containing aromatic heterocycles in its main chain, typically benzimidazole rings. According to theoretical calculations, fibers synthesized by the ternary polycondensation of p-phenylenediamine, terephthaloyl chloride, and benzimidazole diamines can achieve strengths of 4.5 to 5.5 GPa and possess high thermal stability. The decomposition temperature of heterocyclic aromatic polyamide fibers can reach 550°C, making them suitable for use in defense, aviation, aerospace, shipbuilding, automotive, and other industries.

[0003] Heterocyclic aromatic polyamide fiber (aramid III) is made of p-phenylenediamine, p-dibenzoyl chloride, and 5(6)-amino-2-(p-aminophenyl)benzimidazole as raw materials. It is prepared by mixing, co-condensing, telomerizing, forced filtering, and degassing to obtain a high molecular weight polymer solution (spinning pulp), which is then wet-spun, washed, dried, and subjected to high-temperature heat treatment.

[0004] In actual heat treatment applications, the process temperature is typically maintained at 350-450°C. This high temperature requires high heat treatment equipment requirements, occupies a large area, consumes a lot of energy, reduces production rates, and makes operation difficult. Fiber heat treatment typically involves directional stretching nascent fibers at a constant speed and tension through a high-temperature drying tunnel under nitrogen protection. High-temperature heat treatment equipment is typically electrical, and heating methods such as hot air blast and molten salt heating control the temperature of the drying tunnel and nitrogen.

[0005] As a medium- to high-temperature measurement sensor, armored thermocouples are typically used in conjunction with temperature transmitters, regulators, and display instruments to form process control systems. They are used to directly measure or control the temperature of fluids, steam, and gaseous media, as well as solid surfaces, within the (0-1800)°C range in various production processes. Armored thermocouples offer many advantages, including flexibility, high-pressure resistance, fast thermal response time, and durability.

[0006] The armored thermocouple in the prior art includes a thermode, an insulating material, a metal protection sleeve and a junction box.

[0007] The armored thermocouple electrode is made of two conductors of different components welded at both ends to form a loop. The end directly measuring temperature is called the working end, and the terminal end is called the cold end. When there is a temperature difference between the working end and the cold end, a weak current will be generated in the loop. When connected to a display instrument, the instrument will indicate the corresponding temperature value of the thermoelectric electromotive force generated by the thermocouple. The thermoelectric electromotive force of the armored thermocouple will increase as the temperature of the measuring end increases.

[0008] Thermocouple detection is usually done by directly measuring the surface temperature of the drying tunnel in the oven. However, due to the structure of the thermocouple itself, it cannot contact the tubular drying tunnel, resulting in poor heat transfer and delayed and low temperature measurements. In addition, the thermocouple sheath is usually made of metal, and the heating tunnel is also made of metal. If the electric heating circuit of the electrical equipment is short-circuited or grounded, the temperature control system will be introduced through the thermocouple metal protective sheath, causing damage to the temperature control system. Utility Model Content

[0009] The technical problem to be solved by the utility model is to provide a temperature detection device for fiber heat treatment;

[0010] The solution adopted by the utility model to solve the technical problem is:

[0011] A temperature detection device for fiber heat treatment, used to monitor the surface temperature of a heating tunnel; comprising a thermode, a junction box connected to one end of the thermode, a protective sleeve sleeved outside the thermode and transmitting the surface temperature of the heating tunnel to the thermode, and a clamping assembly connected to the end of the protective sleeve away from the junction box and clamped to the outside of the heating tunnel; the clamping assembly is located at the end of the thermode away from the junction box.

[0012] In some possible embodiments, the protective sleeve includes a metal sleeve connected to the clamping assembly, an insulating sleeve connected to an end of the metal sleeve away from the clamping assembly and forming a filling cavity, and an insulating material filled in the filling cavity;

[0013] One end of the thermode away from the junction box is located in the filling cavity and is wrapped by insulating material.

[0014] In some possible implementations, the clamping assembly includes two groups of clamps with the same structure that cooperate with each other to form a clamping cavity, and a locking bolt for locking the two groups of protections; the two groups of clamps are connected to each other.

[0015] In some possible embodiments, the clamp includes a fixing portion installed on the outside of the metal sleeve, two groups of arc-shaped portions respectively connected to the fixing portion on one side away from the insulating sleeve and forming a clamping cavity, and a locking bolt for locking the two groups of arc-shaped portions.

[0016] In some possible implementations, the clamping assembly further includes a clamping hoop assembly for fixing the fixing portion and the metal sleeve.

[0017] In some possible embodiments, the metal sleeve includes a connecting sleeve connected to the insulating sleeve and a limiting sleeve connected to one end of the connecting sleeve away from the insulating sleeve; the inner side surfaces of the connecting sleeve and the limiting sleeve are coplanar, the outer diameter of the connecting sleeve is larger than the outer diameter of the limiting sleeve and there is an annular groove between the outer sides of the two, and the fixing part is installed in the annular groove and its outer side surface is coplanar with the outer side surface of the connecting sleeve.

[0018] In some possible implementations, an annular boss is provided at one end of the insulating sleeve close to the connecting sleeve, and an annular groove for cooperation with the annular boss is provided at one end of the connecting sleeve close to the insulating sleeve.

[0019] In some possible implementations, the insulating sleeve and the connecting sleeve are connected to each other by bonding.

[0020] In some possible implementations, a locking buckle for fixing the insulating sleeve and the connecting sleeve is provided on the outer side of the connection between the insulating sleeve and the connecting sleeve.

[0021] In some possible implementations, the protective sleeve further includes an end cap disposed on a side of the insulating sleeve away from the metal sleeve, and the thermode is connected to the junction box through the end cap.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The utility model realizes the functions of insulating material protection and heat transfer by setting the protective sleeve;

[0024] The utility model provides an insulating sleeve to achieve insulation isolation between the heating tunnel and the control system;

[0025] The utility model fixes the thermocouple and increases the heat transfer area through the clamping component, so that the monitoring accuracy is higher;

[0026] When the utility model is in use, the heat on the surface of the heating drying tunnel is transferred to the thermode through the clamping assembly, the metal sleeve and the insulating material in sequence, generating a weak current signal. The setting of the insulating sleeve will prevent the current on the heating drying tunnel from being introduced into the temperature control system to avoid damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the utility model connected to the heating drying tunnel;

[0028] Figure 2 It is a cross-sectional view of the utility model;

[0029] Figure 3 This is a cross-sectional view of the utility model when the connecting sleeve and the insulating sleeve are connected using a locking buckle;

[0030] Among them: 1. Thermocouple; 2. Junction box; 3. Protective sleeve; 31. Metal sleeve; 311. Connecting sleeve; 312. Limiting sleeve; 32. Insulating sleeve; 321. Annular boss; 33. Insulating material; 4. Clamping assembly; 41. Hoop; 411. Fixing part; 412. Arc-shaped part; 42. Hoop assembly; 43. Clamping cavity; 44. Locking bolt; 5. Locking buckle. DETAILED DESCRIPTION

[0031] In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration; they can refer to direct connections or indirect connections through an intermediary; they can refer to internal communication between two components or interactions between two components. The terms "first," "second," and similar terms mentioned in this application do not denote any order, quantity, or importance; they are simply used to distinguish between different components. Similarly, terms such as "a" or "an" do not indicate a quantitative limitation; rather, they indicate the presence of at least one. In the implementation of this application, "and / or" describes an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more. For example, "plurality" refers to two or more positioning posts. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0032] The utility model is described in detail below.

[0033] like Figure 1-Figure 3 As shown:

[0034] A temperature detection device for fiber heat treatment, used to monitor the surface temperature of a heating tunnel 10; comprising a thermode 1, a junction box 2 connected to one end of the thermode 1 and connected to an external temperature control system, a protective sleeve 3 sleeved outside the thermode 1 and transmitting the surface temperature of the heating tunnel 10 to the thermode 1, and a clamping assembly 4 connected to the end of the protective sleeve 3 remote from the junction box 2 and clamped to the outside of the heating tunnel 10; the clamping assembly 4 is located at the end of the thermode 1 remote from the junction box 2; the clamping assembly 4 transmits the surface temperature of the heating tunnel 10 to the protective sleeve 3;

[0035] Specifically, the thermode 1 and the protective sleeve 3 are coaxially arranged, and the protective sleeve 3 is a sleeve-shaped structure;

[0036] When in use, the clamping assembly 4 is mounted on the outside of the heating drying tunnel 10, and the thermode 1 is vertically arranged and located above the heating drying tunnel 10. The arrangement of the clamping assembly 4 can, on the one hand, enable the two to be fixedly connected to form a stable connection as a whole, and at the same time, can effectively increase the contact area between the present invention and the heating drying tunnel 10, thereby making the monitored temperature more accurate.

[0037] In some possible embodiments, in order to prevent the current on the heating tunnel 10 from being introduced into the temperature control system after passing through the protective sleeve 3, the protective sleeve 3 includes a metal sleeve 31 connected to the clamping assembly 4, an insulating sleeve 32 connected to the end of the metal sleeve 31 away from the clamping assembly 4 and forming a filling cavity, an insulating material 33 filled in the filling cavity, and an end cap 34 provided on the side of the insulating sleeve 32 away from the metal sleeve 31; the end of the thermode 1 away from the junction box 2 is located in the filling cavity and is wrapped by the insulating material 33; the thermode 1 is connected to the junction box 2 through the end cap 34;

[0038] The insulating material 33 can be magnesium oxide, silicon carbide, beryllium oxide, etc., which have good insulation and thermal conductivity in the prior art; the insulating sleeve 32 can be made of ceramic or corundum;

[0039] Specifically, after the clamping assembly 4 transfers the heat from the heating tunnel 10 to the metal sleeve 31, the heat is transferred to the thermode 1 through the insulating material 33. The thermode 1 generates a weak electrical signal, thereby monitoring the surface temperature of the heating tunnel 10 in real time. The arrangement of the insulating material 33 and the insulating sleeve 32 will prevent the current on the heating tunnel 10 from being introduced into the temperature control system, thereby avoiding damage to the temperature control system.

[0040] In some possible embodiments, the clamping assembly 4 includes two sets of clamps 41 having identical structures and cooperating with each other to form a clamping cavity 43, and a locking bolt 44 for locking the two sets of clamps 41; the two sets of clamps 41 are connected to each other; the clamp 41 includes a fixing portion 411 installed on the outside of the metal sleeve 31, and two sets of arc-shaped portions 412 respectively connected to the fixing portion 411 on a side away from the insulating sleeve 32 and forming the clamping cavity 43;

[0041] The fixing portion 411 is sleeved on the outside of the metal sleeve 31, and its end away from the insulating sleeve 32 is connected to the arc portion 412; the openings of the two sets of arc portions 412 are arranged on the side close to each other; when in use, the two sets of arc portions 412 will be sleeved on the outside of the heating tunnel 10, and then the two sets of arc portions will be locked with the locking bolts 44 to achieve the fixation of the utility model to the heating tunnel 10;

[0042] Specifically, the arc portion 412 has an arc groove, and the opening of the arc groove is set on the side where the two groups of arc portions 412 are close to each other. The two groups of arc grooves cooperate to form a clamping cavity 43. The setting of the arc groove will increase the contact area between the arc portion 412 and the outer surface of the heating drying tunnel 10, thereby increasing the heat transfer area and making the temperature measurement more accurate.

[0043] In some possible implementations, in order to effectively achieve the connection and fixation between the clamping assembly 4 and the metal sleeve 31, the clamping assembly 4 further includes a clamping hoop assembly 42 for fixing the fixing portion 411 and the metal sleeve 31.

[0044] The metal sleeve 31 includes a connecting sleeve 311 connected to the insulating sleeve 32 and a limiting sleeve 312 connected to the end of the connecting sleeve 311 away from the insulating sleeve 32; the inner side surfaces of the connecting sleeve 311 and the limiting sleeve 312 are coplanar, the outer diameter of the connecting sleeve 311 is larger than the outer diameter of the limiting sleeve 312, and an annular groove is formed between the outer sides of the two. The fixing portion 411 is installed in the annular groove and its outer side surface is coplanar with the outer side surface of the connecting sleeve 311.

[0045] Specifically, the two sets of fixing parts 411 will be installed in the annular groove, and the clamp assembly 42 will be sleeved on the outside of the fixing part 411. When the clamp assembly 42 is locked, the fixing part 411 will be fixed to the limiting sleeve 312 to form a whole.

[0046] In some possible implementations, an annular boss 321 is provided at one end of the insulating sleeve 32 close to the connecting sleeve 311 , and an annular groove cooperating with the annular boss 321 is provided at one end of the connecting sleeve 311 close to the insulating sleeve 32 .

[0047] The arrangement of the annular boss 321 and the annular groove increases the contact surface area at the connection between the two. When the two are bonded together, the bonding area is increased, and the connection is more stable and reliable.

[0048] Preferably, Figure 3 As shown, a locking buckle 5 for fixing the insulating sleeve 32 and the connecting sleeve 311 is sleeved on the outer side of the connection between the insulating sleeve 32 and the connecting sleeve 311.

[0049] The present invention is not limited to the aforementioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A temperature detection device for fiber heat treatment, used to monitor the surface temperature of a heating tunnel; characterized in that: It includes a thermode, a junction box connected to one end of the thermode, a protective cover sleeved on the outside of the thermode and transmitting the surface temperature of the heating tunnel to the thermode, and a clamping assembly connected to the end of the protective cover away from the junction box and clamped on the outside of the heating tunnel; the clamping assembly is located at the end of the thermode away from the junction box.

2. A temperature detection device for fiber heat treatment according to claim 1, characterized in that: The protective sleeve includes a metal sleeve connected to the clamping assembly, an insulating sleeve connected to an end of the metal sleeve away from the clamping assembly and forming a filling cavity, and an insulating material filled in the filling cavity; One end of the thermode away from the junction box is located in the filling cavity and is wrapped by insulating material.

3. A temperature detection device for fiber heat treatment according to claim 1, characterized in that: The clamping assembly includes two groups of clamps with the same structure that cooperate with each other to form a clamping cavity, and a locking bolt for locking the two groups of protection; the two groups of clamps are connected to each other.

4. A temperature detection device for fiber heat treatment according to claim 3, characterized in that: The clamp includes a fixing portion installed on the outside of the metal sleeve, two groups of arc portions respectively connected to the fixing portion away from the insulating sleeve to form a clamping cavity, and a locking bolt for locking the two groups of arc portions.

5. The temperature detection device for fiber heat treatment according to claim 3, characterized in that: The clamping assembly also includes a clamping hoop assembly for fixing the fixing portion and the metal sleeve.

6. A temperature detection device for fiber heat treatment according to claim 4, characterized in that: The metal sleeve includes a connecting sleeve connected to the insulating sleeve and a limiting sleeve connected to one end of the connecting sleeve away from the insulating sleeve; the inner side surfaces of the connecting sleeve and the limiting sleeve are coplanar, the outer diameter of the connecting sleeve is larger than the outer diameter of the limiting sleeve and an annular groove is formed between the outer sides of the two, and the fixing part is installed in the annular groove and its outer side surface is coplanar with the outer side surface of the connecting sleeve.

7. A temperature detection device for fiber heat treatment according to claim 6, characterized in that: An annular boss is provided at one end of the insulating sleeve close to the connecting sleeve, and an annular groove used in conjunction with the annular boss is provided at one end of the connecting sleeve close to the insulating sleeve.

8. The temperature detection device for fiber heat treatment according to claim 6, characterized in that: The insulating sleeve and the connecting sleeve are connected to each other by bonding.

9. The temperature detection device for fiber heat treatment according to claim 6, characterized in that: A locking buckle for fixing the insulating sleeve and the connecting sleeve is sleeved on the outer side of the connection between the insulating sleeve and the connecting sleeve.

10. The temperature detection device for fiber heat treatment according to claim 2, characterized in that: The protective sleeve further comprises an end cover arranged on a side of the insulating sleeve away from the metal sleeve, and the thermode passes through the end cover and is connected to the junction box.

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