Thermocouple leading-out device
By designing a thermocouple lead-out device with threaded sleeves and screws, the problem of inefficient threading caused by small wiring space in the prior art is solved, and a more efficient and safe wiring process is achieved.
Patent Information
- Application Number
- CN202411903842.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-04-25
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the wiring process, the existing thermocouple lead-out device has low threading efficiency, which affects the wiring efficiency.
A thermocouple lead-out device is designed, including a junction box, an insulating seat, a threaded sleeve and a screw. The threaded sleeve is driven to move through the rotation of the screw, and the insulating seat moves along the junction box, so that the wiring operation is completed in a larger space and improves wiring efficiency.
Complete wiring operations in a larger space improves wiring efficiency and safety, and avoids difficulties and risks when wiring in a narrow space.
Smart Images
Figure CN119880179A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a thermocouple lead-out device, belonging to the field of thermocouples. Background Art
[0002] Thermocouple lead-out device is a device used to safely and effectively transmit thermocouple signals from high temperature areas to measuring instruments. This device is very common in industrial temperature measurement, especially in high temperature environments in metallurgy, chemical industry, electric power and other industries. The two different metal conductors of the thermocouple generate thermoelectric potential at different temperatures, and this thermoelectric potential is proportional to the temperature. The thermoelectric potential generated by the thermocouple is transmitted to the terminal block through the insulating sleeve and the wire. The terminal block transmits the signal to the measuring instrument, such as a thermometer, data acquisition device, etc., for temperature measurement and display. The thermocouple lead-out device includes a junction box with an insulating seat installed inside, and three terminal blocks are installed on the junction box. After one end of the wire is inserted into the junction box, one end of the wire is connected to the terminal block, and then the top cover is screwed on the junction box. In this structure, the insulating seat is on the inside of the junction box, and the relative position of the insulating seat and the junction box is fixed. Because the internal space of the junction box is small, after one end of the wire is inserted into the threading hole on the terminal block, the threading efficiency is low due to the small space, which affects the wiring efficiency. Summary of the invention
[0003] In view of the deficiencies in the prior art, the present invention aims to provide a thermocouple lead-out device to solve the problems raised in the above background technology.
[0004] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical scheme: a thermocouple lead-out device, comprising a junction box, a top cover is threadedly connected to the junction box, the bottom of the junction box is recessed to form a circular groove, a thermocouple is installed in the circular groove, one end of the thermocouple extends to the outside of the junction box, a protective tube is sleeved on the thermocouple, one end of the protective tube is connected and fixed to the junction box, an insulating seat is provided in the junction box, three wiring terminals are equidistantly installed in an annular shape on the upper surface of the insulating seat, an arc groove is recessed on the annular side surface of the insulating seat, a threaded sleeve is installed in the arc groove, a screw is threadedly connected to the threaded sleeve, one end of the screw is rotatably installed in the junction box, a convex head is connected and fixed to the upper end of the screw, a side of the convex head facing away from the screw is recessed to form a hexagonal hole for inserting a hexagonal wrench, a conductive sleeve is connected and fixed to the middle position of the lower surface of the insulating seat, the conductive sleeve is sleeved on the thermocouple, and a threading piece is installed on the outer surface of the junction box.
[0005] Specifically, two symmetrically arranged arc plates are connected and fixed to the outer surface of the threaded sleeve, and the arc plates are installed in the arc groove.
[0006] Specifically, cylinders for separating the wires are installed on the upper surfaces of the two arc-shaped plates, and the cylinders are arranged parallel to the screw rods.
[0007] Specifically, one end of the cylinder close to the arc plate is processed with an external thread, a threaded blind hole is processed at the middle of one side of the arc plate facing the cylinder, and one end of the cylinder processed with the external thread is threadedly connected in the threaded blind hole.
[0008] Specifically, a plug connector is connected and fixed to one side of the arc-shaped plate, two plug connector holes matching with the plug connector are arranged in the arc-shaped groove, and the plug connector is glued in the plug connector holes.
[0009] Specifically, the threading piece includes a threading tube, a threading tube is connected and fixed to the outer surface of the junction box, the threading tube is communicated with the junction box and the threading hole is arranged on a side of the junction box close to the arc groove, the inner thread of the threading tube is connected to an external threaded tube, one end of the external threaded tube that is outside the threading tube is connected and fixed to a first hexahedron, the first hexahedron is a hollow structure, the first hexahedron and the external threaded tube are an integrally formed structure, the inner thread of the external threaded tube is connected to a nut, and the nut is arranged between the first hexahedron and the threading tube.
[0010] Specifically, one side of the junction box close to the arc groove is recessed to form a groove, and a disc head is connected and fixed to the end of the screw away from the protrusion. The disc head is slidably installed in the groove, and a limiting ring is connected and fixed to one side of the groove close to its open end. The limiting ring is in sliding contact with the disc head, and the limiting ring is sleeved on the screw and in sliding contact with the screw.
[0011] Specifically, a second hexahedron is connected and fixed to a side of the junction box facing the protective tube, an externally threaded tube is connected and fixed to a side of the second hexahedron facing away from the junction box, the externally threaded tube is sleeved on the protective tube and the externally threaded tube is connected and fixed to the protective tube, the thermocouple passes through the second hexahedron and the thermocouple is connected and fixed to the second hexahedron.
[0012] Specifically, two convex plates are connected and fixed to one side of the top cover away from the junction box. The two convex plates are arranged parallel to each other. The convex plates and the top cover are an integrally formed structure. A sealing ring is sleeved on the junction box and the sealing ring contacts the opening end of the top cover.
[0013] Specifically, the terminal includes a conductive seat, and three conductive seats are installed in a circular shape and equidistantly on the upper surface of the insulating seat. A wire threading hole is opened on one side of the conductive seat, and a screw hole is opened on the side of the conductive seat away from the insulating seat. The screw hole is connected to the wire threading hole, and a positioning screw for limiting the relative position of the wire head and the conductive seat is connected to the inner thread of the screw hole.
[0014] Beneficial effects of the present invention: 1. Install the threaded sleeve in the arc groove on the insulating seat, and make the arc groove face the threading tube, so as not to affect the insertion of the wire into the junction box through the threading tube, and at the same time facilitate the rotation and installation of the lower end of the screw in the junction box.
[0015] 2. Insert the hexagonal wrench into the hexagonal hole, and then use the hexagonal wrench to turn the screw. When the screw rotates, the threaded sleeve is driven to move. The threaded sleeve drives the insulating seat to move along the junction box, so that the insulating seat is moved to the outside of the junction box, so as to facilitate wiring outside the junction box, that is, insert one end of the wire into the threading hole on the conductive seat in sufficient space. Compared with wiring operations in the narrow space of the junction box, the wiring efficiency is improved and the difficulty of wiring is reduced. The screw is turned in the opposite direction to move the insulating seat into the junction box, so that the wiring terminal is hidden in the junction box. At this time, the screw plays a role in limiting the relative position of the insulating seat and the junction box. There is no need to use gas fasteners to limit the relative position of the insulating seat and the junction box. The conductive sleeve is set on the thermocouple to complete the wiring of the thermocouple.
[0016] 3. Install the two arc plates on the threaded sleeve in the arc groove to increase the connection range between the threaded sleeve and the insulating seat. Install cylinders on the two arc plates. The two cylinders and the screw rod can separate the wires together, so that the exposed ends of the two adjacent wires maintain a sufficient distance, preventing the exposed ends of the two adjacent wires from short-circuiting due to the close distance, thereby improving wiring safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a structural schematic diagram of a thermocouple lead-out device of the present invention; Figure 2 It is a schematic diagram of the assembly of an insulating seat, a wiring terminal, a protection tube and a junction box in a thermocouple lead-out device of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 It is a schematic diagram of the assembly of a threaded sleeve, a thermocouple, a screw, a conductive sleeve and an insulating seat in a thermocouple lead-out device of the present invention; Figure 5 It is a schematic diagram of the assembly of a protection tube, a thermocouple and a junction box in a thermocouple lead-out device of the present invention; In the figure: 1, junction box, 2, external threaded tube, 3, protective tube, 4, second hexahedron, 5, top cover, 6, convex plate, 7, threading tube, 8, nut, 9, first hexahedron, 10, conductive seat, 11, insulating seat, 12, external threaded tube, 13, sealing ring, 14, positioning screw, 15, hexagonal hole, 16, screw, 17, cylinder, 18, arc plate, 19, threaded sleeve, 20, convex head, 21, screw hole, 22, threading hole, 23, conductive sleeve, 24, disc head, 25, limit ring, 26, round groove, 27, groove, 28, thermocouple. DETAILED DESCRIPTION
[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0019] See also Figure 1 and Figure 2 The present invention provides a technical solution: a thermocouple lead-out device, comprising a junction box 1, a top cover 5 is threadedly connected to the junction box 1, two convex plate portions 6 are connected and fixed to a side of the top cover 5 facing away from the junction box 1, the two convex plate portions 6 are arranged parallel to each other, the convex plate portions 6 and the top cover 5 are an integrally formed structure, the convex plate portions 6 provide a fulcrum for twisting the junction box 1, a sealing ring 13 is sleeved on the junction box 1, the sealing ring 13 is in contact with the open end of the top cover 5, and the sealing ring 13 improves the sealing between the junction box 1 and the top cover 5.
[0020] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The bottom of the junction box 1 is recessed to form a circular groove 26, and a thermocouple 28 is installed in the circular groove 26. One end of the thermocouple 28 extends to the outside of the junction box 1. A protective tube 3 is sleeved on the thermocouple 28, and one end of the protective tube 3 is connected and fixed to the junction box 1. A second hexahedron 4 is connected and fixed to the side of the junction box 1 facing the protective tube 3, and an externally threaded tube 2 is connected and fixed to the side of the second hexahedron 4 facing away from the junction box 1. The externally threaded tube 2 is sleeved on the protective tube 3 and the externally threaded tube 12 is connected and fixed to the protective tube 3. The thermocouple 28 penetrates the second hexahedron 4 and the thermocouple 28 is connected and fixed to the second hexahedron 4, so that the protective tube 3 is inserted in the container, and the externally threaded tube 2 is threadedly connected to the threaded hole on the container, so that the junction box 1 is installed on the surface of the container, and the second hexahedron 4 provides a clamping position for the wrench.
[0021] See also Figure 2 and Figure 4An insulating seat 11 is provided in the junction box 1, and three wiring terminals are installed in a circular shape and equidistantly on the upper surface of the insulating seat 11, wherein the wiring terminals include a conductive seat 10, and three conductive seats 10 are installed in a circular shape and equidistantly on the upper surface of the insulating seat 11, and a threading hole 22 is opened on one side of the conductive seat 10, and a screw hole 21 is opened on the side of the conductive seat 10 away from the insulating seat 11, and the screw hole 21 is communicated with the threading hole 22, and a positioning screw 14 for limiting the relative position of the wire head and the conductive seat 10 is connected to the inner thread of the screw hole 21, so that one end of the wire is inserted into the threading hole 22, and then the positioning screw 14 is used to limit the position of the wire to complete the connection between the wire and the conductive seat 10.
[0022] See also Figure 1-Figure 5 The annular side surface of the insulating seat 11 is recessed to form an arc groove, and a threaded sleeve 19 is installed in the arc groove. The threaded sleeve 19 is internally threaded with a screw 16, and one end of the screw 16 is rotatably installed in the junction box 1. A convex head 20 is connected and fixed to the upper end of the screw 16, and a side of the convex head 20 facing away from the screw 16 is recessed to form an inner hexagonal hole 15 for inserting an inner hexagonal wrench. A conductive sleeve 23 is connected and fixed to the middle position of the lower surface of the insulating seat 11, and the conductive sleeve 23 is sleeved on the thermocouple 28, so that the threaded sleeve 19 is installed in the arc groove on the insulating seat 11, and the arc groove is facing the threading tube 7, so as not to affect the insertion of the wire into the junction box 1 through the threading tube 7, and at the same time, it is convenient to rotate the lower end of the screw 16 and install it in the junction box 1, so that the inner hexagonal wrench is inserted into the inner hexagonal hole 15, and the inner hexagonal wrench can be used to twist the screw. 16. When the screw rod 16 rotates, the threaded sleeve 19 is driven to move, and the threaded sleeve 19 drives the insulating seat 11 to move along the junction box 1, so that the insulating seat 11 moves to the outside of the junction box 1, thereby facilitating wiring outside the junction box 1, that is, inserting one end of the wire into the threading hole 22 on the conductive seat 10 in sufficient space. Compared with wiring operations in the narrow space in the junction box 1, the wiring efficiency is improved and the difficulty of wiring is reduced. The screw rod 16 is twisted in the reverse direction to move the insulating seat 11 into the junction box 1, so that the wiring terminal is hidden in the junction box 1. At this time, the screw rod 16 plays a role in limiting the relative position of the insulating seat 11 and the junction box 1, and there is no need to use other fasteners to limit the relative position of the insulating seat 11 and the junction box 1, so that the conductive sleeve 23 is sleeved on the thermocouple 28 to complete the wiring of the thermocouple 28.
[0023] See also Figure 2-Figure 5The outer surface of the threaded sleeve 19 is connected and fixed with two symmetrically arranged arc plates 18, which are installed in the arc groove. The upper surfaces of the two arc plates 18 are installed with cylinders 17 for separating the wires. The cylinders 17 are arranged in parallel with the screw 16, wherein one end of the cylinder 17 close to the arc plate 18 is processed with an external thread, and the middle position of the side of the arc plate 18 facing the cylinder 17 is processed with a threaded blind hole, so that the end of the cylinder 17 processed with the external thread is threadedly connected in the threaded blind hole, completing the assembly of the cylinder 17 and the arc plate 18, and one side of the arc plate 18 is connected and fixed with a plug connector, and a hole is opened in the arc groove. There are two plug-in holes that match the plug connector, so that the plug connector is glued in the plug-in holes by glue, which improves the stability of the connection between the arc plate 18 and the insulating seat 11, and the two arc plates 18 on the threaded sleeve 19 are installed in the arc groove, which improves the connection range between the threaded sleeve 19 and the insulating seat 11. By installing cylinders 17 on both arc plates 18, the two cylinders 17 and the screw 16 jointly play the role of separating the wires, so that the exposed ends of the two adjacent wires maintain a sufficient distance, preventing the exposed ends of the two adjacent wires from short-circuiting due to the close distance, and improving the wiring safety.
[0024] See also Figure 4 and Figure 5 A groove 27 is formed on one side of the junction box 1 near the arc groove, and a disc head 24 is connected and fixed to the end of the screw 16 away from the protruding head 20. The disc head 24 is slidably installed in the groove 27. A limiting ring 25 is connected and fixed to one side of the groove 27 near its open end. The limiting ring 25 is in sliding contact with the disc head 24. The limiting ring 25 is sleeved on the screw 16 and in sliding contact with the screw 16. The limiting ring 25 limits the disc head 24 in the groove 27, that is, when the screw 16 rotates, the disc head 24 rotates in the groove 27, thereby realizing the rotational connection between the screw 16 and the junction box 1.
[0025] See also Figure 1 , Figure 2 and Figure 5 A threading tube 7 is connected and fixed to the outer surface of the junction box 1. The threading tube 7 is communicated with the junction box 1 and the threading hole 22 is arranged on the side of the junction box 1 close to the arc groove. The threading tube 7 is connected to the external threaded tube 12 through the internal thread. The external threaded tube 12 is connected and fixed to the first hexahedron 9 at one end outside the threading tube 7. The first hexahedron 9 is a hollow structure. The first hexahedron 9 and the external threaded tube 12 are an integrally formed structure. The external threaded tube 12 is connected to a nut 8 through the internal thread. The nut 8 is arranged between the first hexahedron 9 and the threading tube 7, so that the wire passes through the external threaded tube 12 and the threading tube 7 and is inserted into the junction box 1, which is convenient for wiring. The external threaded tube 12 is screwed into the threading tube 7. The first hexahedron 9 provides a clamping position for the wrench. The nut 8 is screwed so that the nut 8 fits tightly with the threading tube 7 to prevent the external threaded tube 12 from rotating at will.
[0026] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A thermocouple lead-out device, comprising a junction box (1), characterized in that: The junction box (1) is threadedly connected to a top cover (5), the bottom of the junction box (1) is recessed to form a circular groove (26), a thermocouple (28) is installed in the circular groove (26), one end of the thermocouple (28) extends to the outside of the junction box (1), a protective tube (3) is sleeved on the thermocouple (28), one end of the protective tube (3) is connected and fixed to the junction box (1), an insulating seat (11) is provided in the junction box (1), three wiring terminals are equidistantly installed on the upper surface of the insulating seat (11) in the form of a ring, and the circular side surface of the insulating seat (11) is recessed to form an arc groove A threaded sleeve (19) is installed in the arc groove, and the threaded sleeve (19) is internally threadedly connected to a screw rod (16). One end of the screw rod (16) is rotatably installed in the junction box (1). A protrusion (20) is connected and fixed to the upper end of the screw rod (16). A side of the protrusion (20) facing away from the screw rod (16) is recessed to form a hexagonal hole (15) for inserting an hexagonal wrench. A conductive sleeve (23) is connected and fixed to the middle position of the lower surface of the insulating seat (11). The conductive sleeve (23) is sleeved on the thermocouple (28). A threading piece is installed on the outer surface of the junction box (1).
2. A thermocouple lead-out device according to claim 1, characterized in that: Two symmetrically arranged arc-shaped plates (18) are connected and fixed to the outer surface of the threaded sleeve (19), and the arc-shaped plates (18) are installed in the arc-shaped groove.
3. A thermocouple lead-out device according to claim 2, characterized in that: A cylinder (17) for separating the wires is installed on the upper surface of the two arc-shaped plates (18), and the cylinder (17) is arranged parallel to the screw rod (16).
4. A thermocouple lead-out device according to claim 3, characterized in that: An end of the cylinder (17) close to the arc-shaped plate (18) is processed with an external thread, a threaded blind hole is processed at the middle of a surface of the arc-shaped plate (18) facing the cylinder (17), and an end of the cylinder (17) processed with the external thread is threadedly connected in the threaded blind hole.
5. A thermocouple lead-out device according to claim 2, characterized in that: A plug connector is connected and fixed to one side of the arc-shaped plate (18); two plug connector holes matching the plug connector are provided in the arc-shaped groove; the plug connector is glued into the plug connector holes.
6. A thermocouple lead-out device according to claim 1, characterized in that: The threading member comprises a threading tube (7), the outer surface of the junction box (1) is connected and fixed with the threading tube (7), the threading tube (7) is communicated with the junction box (1), and the threading hole (22) is arranged on a side of the junction box (1) close to the arc groove, the threading tube (7) is internally threadedly connected with an externally threaded tube (12), one end of the externally threaded tube (12) located outside the threading tube (7) is connected and fixed with a first hexahedron (9), the first hexahedron (9) is a hollow structure, the first hexahedron (9) and the externally threaded tube (12) are an integrally formed structure, the externally threaded tube (12) is internally threadedly connected with a nut (8), and the nut (8) is arranged between the first hexahedron (9) and the threading tube (7).
7. A thermocouple lead-out device according to claim 1, characterized in that: A side of the junction box (1) close to the arc groove is recessed to form a groove (27); an end of the screw rod (16) away from the protruding head (20) is connected and fixed with a disc head (24); the disc head (24) is slidably mounted in the groove (27); a limit ring (25) is connected and fixed to a side of the groove (27) close to its open end; the limit ring (25) is in sliding contact with the disc head (24); the limit ring (25) is sleeved on the screw rod (16) and in sliding contact with the screw rod (16).
8. A thermocouple lead-out device according to claim 1, characterized in that: A second hexahedron (4) is connected and fixed to a surface of the junction box (1) facing the protective tube (3); an externally threaded tube (2) is connected and fixed to a surface of the second hexahedron (4) facing away from the junction box (1); the externally threaded tube (2) is sleeved on the protective tube (3) and the externally threaded tube (12) is connected and fixed to the protective tube (3); the thermocouple (28) passes through the second hexahedron (4) and the thermocouple (28) is connected and fixed to the second hexahedron (4).
9. A thermocouple lead-out device according to claim 1, characterized in that: Two convex plate portions (6) are connected and fixed to a side of the top cover (5) facing away from the junction box (1); the two convex plate portions (6) are arranged parallel to each other; the convex plate portions (6) and the top cover (5) are an integrally formed structure; a sealing ring (13) is sleeved on the junction box (1); the sealing ring (13) is in contact with an open end of the top cover (5).
10. A thermocouple lead-out device according to claim 1, characterized in that: The wiring terminal comprises a conductive seat (10), three conductive seats (10) are equidistantly mounted in a ring shape on the upper surface of the insulating seat (11), a threading hole (22) is provided on one side of the conductive seat (10), a screw hole (21) is provided on a side of the conductive seat (10) away from the insulating seat (11), the screw hole (21) is communicated with the threading hole (22), and a positioning screw (14) for limiting the relative position of the wire head and the conductive seat (10) is connected to the internal thread of the screw hole (21).