Reducing thermocouple

Abstract

The utility model provides a hole shrinkage type thermocouple, which comprises a junction box, a main body section is arranged on the junction box, one end of the main body section is provided with a hole shrinkage section, the inside of the main body section is connected with a measuring end in a sliding manner, the surface of the measuring end is connected with a mounting piece in a rotating manner, and an adjusting mechanism is arranged inside the mounting piece. And a replacement mechanism is arranged in the main body section. The installation piece is rotated anticlockwise, so that the rubber block relieves the extrusion of the protection sleeve, at the moment, the protection sleeve is pushed to slide in the main body section, the measurement end can adapt to the temperature measurement requirements of different positions, the whole thermocouple does not need to be replaced, and then the installation piece is rotated clockwise, so that the rubber block extrudes the protection sleeve to complete the fixation of the measurement end. Then the connecting block is rotated through the fixing ring, the fixing block returns to the surface of the groove, at the moment, the spring pushes the clamping block to be meshed with the gear ring, the installation piece is limited, and finally the thermocouple is installed at the designated position through the installation piece.

Description

Technical Field

[0001] This utility model relates to the field of thermocouple technology, and in particular to a reduced-diameter thermocouple. Background Technology

[0002] Thermocouples, as core sensing elements in industrial temperature measurement, are widely used in industries such as chemical engineering, metallurgy, aerospace, and electronics manufacturing. Their performance directly affects the accuracy of process control and the safety of equipment operation. However, traditional thermocouples mostly adopt a constant diameter structure design, which has two major technical defects: First, the overall diameter of the thermoelectrode and the protective tube is the same, resulting in a large heat capacity and a slow thermal response speed (the time constant is usually 30-500ms), making it difficult to meet the real-time temperature measurement requirements of dynamic temperature change scenarios (such as instantaneous chemical reactions and pulse heating); Second, the radial dimension of the constant diameter structure is fixed, which is prone to interference when installed in narrow spaces (such as miniature reaction vessels, narrow-diameter pipes, and precision instrument cavities), making it impossible to accurately reach the temperature measurement point. Moreover, the large diameter structure increases heat conduction loss and reduces temperature measurement accuracy. Utility Model Content

[0003] The purpose of this invention is to provide a reduced-diameter thermocouple to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a reduced-diameter thermocouple, including a junction box, a main body section mounted on the junction box, a reduced-diameter section at one end of the main body section, a measuring end slidably connected inside the main body section, a mounting component rotatably connected to the surface of the measuring end, the measuring end including a first thermoelectrode, the surface of the first thermoelectrode being covered with an insulating layer, the surface of the insulating layer being covered with a protective sleeve, an adjustment mechanism being provided inside the mounting component, and a replacement mechanism being provided inside the main body section;

[0005] The adjustment mechanism includes a second thermoelectrode, which is installed inside the main body section and slidably connected to the first thermoelectrode. One end of the second thermoelectrode is connected to a junction box. A groove is formed on the surface of the main body section, and a rubber block is installed inside the groove. A compression block is fixedly connected to the inner wall of the mounting component, and the compression block is slidably connected to the groove. A toothed ring is fixed on the surface of the main body section. A groove is formed on the surface of the mounting component. A connecting rod is slidably connected inside the mounting component. A spring is connected to the surface of the connecting rod. A locking block is fixedly connected to one end of the connecting rod. A connecting block is rotatably connected to one end of the connecting rod. A fixing block is fixedly connected to the surface of the connecting block. A fixing ring is fixedly connected to the surface of the connecting block.

[0006] Preferably, the insulating layer is made of high-temperature resistant polyimide film or alumina ceramic microtubes, the protective sleeve is made of thin-walled stainless steel, high-temperature resistant ceramic or silicon carbide, and the diameter reduction section is made using a gradual transition process.

[0007] Preferably, the connecting rod is slidably connected to the mounting component via a spring, and the outer wall surface dimensions of the fixing block match the inner wall surface dimensions of the groove.

[0008] Preferably, the mounting component is slidably connected to the slide groove via an extrusion block, and the slide groove is evenly distributed along the circumferential direction on the outer periphery of the main body section.

[0009] Preferably, the replacement mechanism includes a heat insulation sleeve, which is slidably mounted on the surface of the second thermoelectrode. A threaded cover is installed on the surface of the heat insulation sleeve, and a limit block is fixedly connected to the surface of the threaded cover. A limit groove is formed on the inner wall of the main body section. A spring plate is fixedly connected to the surface of the threaded cover, and a damping block is fixedly connected to one end of the spring plate. A connecting plate is slidably connected to the surface of the threaded cover, and a threaded groove is formed on one end of the surface of the protective sleeve.

[0010] Preferably, the threaded cover is slidably connected to the limiting groove via a limiting block, and the top surface of the connecting plate is in contact with the surface of the spring sheet.

[0011] Unlike existing technologies, the beneficial effects of this application are as follows:

[0012] This reduced-diameter thermocouple works by rotating the mounting component counterclockwise, which releases the rubber block from the protective sleeve. This allows the protective sleeve to slide inside the main body, enabling the measuring end to adapt to temperature measurement needs at different locations without replacing the entire thermocouple. Then, rotating the mounting component clockwise causes the rubber block to press against the protective sleeve, securing the measuring end. Next, the connecting block is rotated by the fixing ring, causing the fixing block to return to the surface of the groove. At this point, the spring pushes the locking block to engage with the toothed ring, thus limiting the mounting component. Finally, the thermocouple is installed in the designated position using the mounting component.

[0013] (2) After the pressure on the measuring end is released, the measuring end is taken out from the inside of the main body section by rotating the protective sleeve. At this time, the spring plate drives the damping block to contact the limiting groove and generate damping. When the new measuring end is inserted into the inside of the main body section, the damping between the damping block and the limiting groove can prevent the threaded cover from moving. At this time, the measuring end is rotated and connected to the threaded cover through the threaded groove. At the same time, the connecting plate pushes the spring plate to deform and drives the damping block to separate from the surface of the limiting groove, so as to release the limiting of the threaded cover. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure in which the reduced diameter section and the measuring end of this utility model cooperate with each other;

[0016] Figure 3 This is a schematic cross-sectional view of the measuring end of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the rubber block and the extrusion block of this utility model in cooperation with each other;

[0018] Figure 5 This is a schematic diagram of the interlocking structure of the main body segment and the toothed ring of this utility model;

[0019] Figure 6 This is a schematic diagram of the interlocking structure of the connecting block and the fixing block of this utility model;

[0020] Figure 7 This is a schematic diagram of the structure of the limiting block and the limiting groove of this utility model.

[0021] In the diagram: 1. Junction box; 2. Main body section; 3. Reduced diameter section; 4. Measuring end; 401. First thermoelectrode; 402. Insulation layer; 403. Protective sleeve; 5. Mounting component; 6. Adjustment mechanism; 601. Second thermoelectrode; 602. Slide groove; 603. Rubber block; 604. Extrusion block; 605. Toothed ring; 606. Groove; 607. Connecting rod; 608. Spring; 609. Locking block; 610. Connecting block; 611. Fixing block; 612. Fixing ring; 7. Replacement mechanism; 701. Heat insulation sleeve; 702. Threaded cap; 703. Limiting block; 704. Limiting groove; 705. Spring plate; 706. Damping block; 707. Connecting plate; 708. Threaded groove. 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. 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.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the description of embodiments of this utility model herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0025] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0026] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0027] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Example 1

[0029] Please see Figure 1 - Figure 7As shown in the figure, a reduced-diameter thermocouple includes a junction box 1, a main body section 2 mounted on the junction box 1, a reduced-diameter section 3 at one end of the main body section 2, a measuring end 4 slidably connected inside the main body section 2, and a mounting component 5 rotatably connected to the surface of the measuring end 4. The measuring end 4 includes a first thermoelectrode 401, the surface of which is covered with an insulating layer 402, and the surface of the insulating layer 402 is covered with a protective sleeve 403. An adjustment mechanism 6 is provided inside the mounting component 5, and a replacement mechanism 7 is provided inside the main body section 2. The adjustment mechanism 6 includes a second thermoelectrode 601, which is installed inside the main body section 2 and slidably connected to the first thermoelectrode 401. One end of the second thermoelectrode 601 is connected to the junction box 1. The junction box 1 is connected, and the surface of the main body section 2 is provided with a sliding groove 602. A rubber block 603 is installed inside the sliding groove 602. A pressing block 604 is fixedly connected to the inner wall of the mounting part 5, and the pressing block 604 is slidably connected to the sliding groove 602. A toothed ring 605 is fixedly connected to the surface of the main body section 2. A groove 606 is provided on the surface of the mounting part 5. A connecting rod 607 is slidably connected inside the mounting part 5. A spring 608 is connected to the surface of the connecting rod 607. A locking block 609 is fixedly connected to one end of the connecting rod 607. A connecting block 610 is rotatably connected to one end of the connecting rod 607. A fixing block 611 is fixedly connected to the surface of the connecting block 610. A fixing ring 612 is fixedly connected to the surface of the connecting block 610.

[0030] In use, first fasten the fixing ring 612 and pull the connecting block 610 and the connecting rod 607 outward to stretch the spring 608. The sliding of the connecting rod 607 will cause the locking block 609 to separate from the toothed ring 605. At this time, the fixing block 611 will slide out of the groove 606. Then, rotate the connecting block 610 to change the position of the fixing block 611, so that the fixing block 611 moves out of the surface of the groove 606 and contacts the surface of the mounting part 5. This will limit the connection block 610 and prevent the spring 608 from being pulled by the force to reset the connecting rod 607. Then, rotate the mounting part 5 counterclockwise to release the squeezing block 604 from squeezing the rubber block 603. At this time, push the protective sleeve 403 to slide inside the main body section 2. At the same time, the first thermoelectrode 401 will slide synchronously on the surface of the second thermoelectrode 601, so that the measuring end 4 can adapt to the temperature measurement requirements of different positions without replacing the entire thermocouple.

[0031] After the length of the measuring end 4 extending beyond the surface of the main body section 2 is adjusted, the mounting part 5 is rotated clockwise. At this time, the mounting part 5 will drive the pressing block 604 to slide inside the slide groove 602 and press the rubber block 603. At this time, the rubber block 603 deforms under the force and presses the surface of the protective sleeve 403. By pressing the protective sleeve 403 with the rubber block 603, the measuring end 4 can be fixed. Then, the connecting block 610 is rotated by the fixing ring 612, so that the fixing block 611 returns to the surface of the groove 606. At this time, the spring 608 is pulled by the force to reset the connecting rod 607, thereby pushing the locking block 609 to engage with the toothed ring 605, thereby limiting the mounting part 5 and preventing the mounting part 5 from rotating on the surface of the main body section 2. Finally, the thermocouple is installed in the designated position by the mounting part 5.

[0032] The insulating layer 402 is made of high-temperature resistant polyimide film or alumina ceramic microtubes, the protective sleeve 403 is made of thin-walled stainless steel, high-temperature resistant ceramic or silicon carbide, and the diameter reduction section 3 is made by a gradual transition process.

[0033] In use, the insulating layer 402 is made of high-temperature resistant polyimide film or alumina ceramic microtubes to adaptably wrap the first thermoelectrode 401, avoiding damage to the insulating layer 402. The protective sleeve 403 adopts a reduced diameter structure in sync with the first thermoelectrode 401. The main body section 2 can be made of thin-walled stainless steel, high-temperature resistant ceramic or silicon carbide material to provide reliable mechanical protection. The diameter of the reduced diameter section 3 smoothly shrinks from the main body section 2 to fit the measuring end 4, adapting to the narrow temperature measuring space. The inner wall of the protective sleeve 403 has axial microgrooves to reduce the contact area with the first thermoelectrode 401 and reduce the interface thermal resistance.

[0034] The replacement mechanism 7 includes a heat insulation sleeve 701, which is slidably mounted on the surface of the second thermoelectrode 601. A threaded cover 702 is installed on the surface of the heat insulation sleeve 701. A limit block 703 is fixedly connected to the surface of the threaded cover 702. A limit groove 704 is opened on the inner wall of the main body section 2. A spring plate 705 is fixedly connected to the surface of the threaded cover 702. A damping block 706 is fixedly connected to one end of the spring plate 705. A connecting plate 707 is slidably connected to the surface of the threaded cover 702. A threaded groove 708 is opened on the surface of one end of the protective sleeve 403.

[0035] When it is necessary to replace the measuring end 4 during use, rotate the mounting part 5 counterclockwise to release the pressure of the rubber block 603 on the measuring end 4. At this time, rotate the protective sleeve 403, which is connected to the threaded cover 702 through the threaded groove 708. With the limit groove 704 limiting the limit block 703, the rotational movement of the measuring end 4 is converted into the downward linear movement of the measuring end 4. The threaded groove 708 on the protective sleeve 403 slides out of the inside of the threaded cover 702, and the measuring end 4 can be taken out from the inside of the main body section 2. As the threaded groove 708 slides out of the inside of the threaded cover 702, the protective sleeve 403 releases the pushing force on the bottom of the limit block 703, and the limit block 703 will slowly slide into the inside of the threaded cover 702. At this time, the spring plate 705 is driven by the force to rotate the damping block 706 towards the limit groove 704, so that the damping block 706 contacts the inner wall of the limit groove 704 and generates damping.

[0036] When the new measuring end 4 is inserted into the body section 2 and comes into contact with the threaded cover 702, the damping between the damping block 706 and the limiting groove 704 can prevent the threaded cover 702 from moving. At this time, the measuring end 4 is rotated and threadedly connected to the threaded cover 702 through the threaded groove 708. At the same time, the protective sleeve 403 will push the connecting plate 707 upward, causing the connecting plate 707 to push the spring plate 705 to deform and drive the damping block 706 to separate from the surface of the limiting groove 704, thereby releasing the limiting of the threaded cover 702.

[0037] The heat insulation sleeve 701 can prevent the heat on the second thermoelectrode 601 from dissipating towards the threaded cover 702, thus ensuring that the temperature of the second thermoelectrode 601 remains constant and avoiding the impact of temperature fluctuations on the temperature detection accuracy of the thermocouple.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A reduced-diameter thermocouple, comprising a junction box (1), a main body section (2) mounted on the junction box (1), a reduced-diameter section (3) provided at one end of the main body section (2), a measuring end (4) slidably connected inside the main body section (2), and a mounting component (5) rotatably connected to the surface of the measuring end (4), characterized in that: The measuring end (4) includes a first thermoelectrode (401), the surface of the first thermoelectrode (401) is covered with an insulating layer (402), the surface of the insulating layer (402) is covered with a protective sleeve (403), the mounting component (5) is provided with an adjustment mechanism (6), and the main body section (2) is provided with a replacement mechanism (7). The adjustment mechanism (6) includes a second heat electrode (601), which is installed inside the main body section (2) and slidably connected to the first heat electrode (401). One end of the second heat electrode (601) is connected to the junction box (1). A groove (602) is provided on the surface of the main body section (2). A rubber block (603) is installed inside the groove (602). A compression block (604) is fixedly connected to the inner wall of the mounting component (5), and the compression block (604) is slidably connected to the groove (602). The surface of the main body section (2) A toothed ring (605) is fixed thereon. A groove (606) is provided on the surface of the mounting part (5). A connecting rod (607) is slidably connected inside the mounting part (5). A spring (608) is connected to the surface of the connecting rod (607). A locking block (609) is fixedly connected to one end of the connecting rod (607). A connecting block (610) is rotatably connected to one end of the connecting rod (607). A fixing block (611) is fixedly connected to the surface of the connecting block (610). A fixing ring (612) is fixedly connected to the surface of the connecting block (610).

2. A reduced-diameter thermocouple according to claim 1, characterized in that: The insulating layer (402) is made of high-temperature resistant polyimide film or alumina ceramic microtubes, the protective sleeve (403) is made of thin-walled stainless steel, high-temperature resistant ceramic or silicon carbide, and the reduced diameter section (3) is made by a gradual transition process.

3. A reduced-diameter thermocouple according to claim 1, characterized in that: The connecting rod (607) is slidably connected to the mounting part (5) via a spring (608), and the outer wall surface size of the fixing block (611) matches the inner wall surface size of the groove (606).

4. A reduced-diameter thermocouple according to claim 1, characterized in that: The mounting component (5) is slidably connected to the slide groove (602) via the extrusion block (604), and the slide groove (602) is evenly distributed along the circumferential direction on the outer periphery of the main body section (2).

5. A reduced-diameter thermocouple according to claim 1, characterized in that: The replacement mechanism (7) includes a heat insulation sleeve (701), which is slidably mounted on the surface of the second thermoelectrode (601). A threaded cover (702) is installed on the surface of the heat insulation sleeve (701). A limit block (703) is fixedly connected to the surface of the threaded cover (702). A limit groove (704) is opened on the inner wall of the main body section (2). A spring plate (705) is fixedly connected to the surface of the threaded cover (702). A damping block (706) is fixedly connected to one end of the spring plate (705). A connecting plate (707) is slidably connected to the surface of the threaded cover (702). A threaded groove (708) is opened on the surface of one end of the protective sleeve (403).

6. A reduced-diameter thermocouple according to claim 5, characterized in that: The threaded cap (702) is slidably connected to the limiting groove (704) via the limiting block (703), and the top surface of the connecting plate (707) is in contact with the surface of the spring sheet (705).

Images