Thermocouple

Abstract

The invention discloses a thermocouple which comprises a thermocouple body, a box cover, an outgoing line sleeve and a clamping assembly. The box cover is detachably connected with the thermocouple body, and the lead-out wire sleeve is used for a thermocouple wire to pass through. And the thermocouple body is internally provided with a wiring terminal which is connected with a thermocouple wiring. The clamping assembly comprises a lifting assembly, a first clamping plate and a second clamping plate. The first clamping plate and the second clamping plate are arranged between the wiring terminal and the outgoing line sleeve along the outgoing line path, and the lifting assembly at least can drive the first clamping plate and the second clamping plate to move close to each other so as to clamp the thermocouple wiring. Compared with the prior art, the thermocouple disclosed by the invention fixes and supports the thermocouple wiring through the design of adding the clamping assembly, thereby effectively avoiding the wiring loosening problem caused by the falling tension of a transmission line, guaranteeing the stable transmission of a temperature measurement signal, and improving the reliability of the temperature measurement signal. Reliable data support is provided for start-stop, load adjustment and fault early warning of a thermal power plant thermodynamic system.

Description

Technical Field

[0001] This application relates to the field of thermocouple technology, and more specifically, to a thermocouple. Background Technology

[0002] In the thermal control system of thermal power plants, thermocouples are widely used for temperature monitoring of key equipment such as boiler furnace, superheater, reheater, and turbine cylinder, providing key data support for the start-up, shutdown, load regulation, and fault early warning of thermal power plant systems.

[0003] In the actual operation of thermal control systems in power plants, the tension caused by the sagging of thermocouple transmission lines can easily loosen the connection between the thermocouple device and the terminal block, thus affecting the stability of the measurement signal. Currently, the transmission lines of thermocouple devices are often fixed by knotting the wires; however, the knotted area is where the stress is most concentrated. Under long-term vibration, equipment movement, or accidental pulling, the knot will tighten further, causing fatigue, deformation, or breakage of the internal metal conductors, insulation layer, and even shielding layer of the cable at the knot. Furthermore, if the knot is not tight or the cable surface is smooth, the knot may also loosen under vibration, losing its fixing function and causing the temperature probe position to change, affecting the measurement.

[0004] Therefore, how to avoid loose wiring caused by the transmission line sagging and improve the stability of thermocouple measurement signal transmission has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to disclose a thermocouple to improve the stability of thermocouple measurement signal transmission.

[0006] A thermocouple includes a thermocouple body, a cover, a lead wire sheath, and a clamping assembly;

[0007] The cover is detachably connected to the thermocouple body, and the lead wire sleeve communicates with the inner cavity of the thermocouple body for the thermocouple wire to pass through; the thermocouple body is provided with a terminal block for connecting the thermocouple wire.

[0008] The clamping assembly includes a lifting assembly, a first clamping plate, and a second clamping plate. Along the lead-out path, the first clamping plate and the second clamping plate are disposed between the terminal block and the lead-out sleeve. The lifting assembly is capable of driving the first clamping plate and the second clamping plate to move closer to each other to clamp the thermocouple wire.

[0009] In one possible implementation, the lifting assembly includes a first piston cylinder and a second piston cylinder, the rod chambers of the first piston cylinder and the second piston cylinder are both located on the side close to the lid, the rodless chambers of the first piston cylinder and the rodless chambers of the second piston cylinder are in communication, the second clamping plate is located on the side of the first clamping plate away from the lid, and the piston rod of the second piston cylinder is connected to the second clamping plate.

[0010] In one possible implementation, the first clamping plate is connected to the piston rod of the first piston cylinder, and the piston rods of the first piston cylinder and the second piston cylinder are parallel.

[0011] In one possible implementation, a return spring and a clamping assembly are also included;

[0012] The clamping assembly is connected to the cover. When the cover is in the assembled state, the clamping assembly pushes the piston rod of the first piston cylinder in the direction from the first clamping plate to the second clamping plate and compresses the return spring, so that the first clamping plate and the second clamping plate clamp the thermocouple wire.

[0013] In one possible implementation, it further includes a column, a limiting component, and a driving component, wherein the column is fixedly connected to the terminal block;

[0014] The limiting component includes at least a locked position and a released position. When the limiting component is in the locked position, the column and the clamping component are fixed to each other. When the limiting component is in the released position, the column and the clamping component can move relative to each other. The driving component is used to drive the limiting component to move between the locked position and the released position.

[0015] In one possible implementation, the column is provided with an inner groove, and the limiting component includes a toothed plate, a compression spring, and a locking plate;

[0016] The toothed plate is located within the inner groove and includes a first side and a second side, the first side being provided with teeth; one end of the compression spring is connected to the second side and the other end is connected to the inner groove; the clamping plate is connected to the pressing assembly; when the limiting assembly is in the locked position, the clamping plate engages with the teeth; when the limiting assembly is in the released position, the clamping plate separates from the teeth.

[0017] In one possible implementation, the clamping assembly includes an outer sleeve and an insert.

[0018] The outer sleeve rod is fixedly installed on the inside of the box cover, and the outer sleeve rod has a through channel inside;

[0019] The insertion rod has a rod body and an abutment end, the abutment end being used to abut against the first clamping plate; the rod body is disposed within the channel of the outer sleeve rod and is movable along the axial direction of the channel; the radial dimension of the channel is smaller than the radial dimension of the abutment end; the limiting component is connected to the insertion rod.

[0020] In one possible implementation, the drive assembly includes a tension spring and a rotation assembly; the outer sleeve has an opening slot, the insert rod has a square compartment, and the opening slot and the square compartment are clearance-fitted with the clamping plate;

[0021] One end of the tension spring is connected to the clamping plate, and the other end is connected to the container. The tension spring drives the clamping plate to move closer to the container; the rotating assembly drives the clamping plate to move away from the container.

[0022] In one possible implementation, the rotating assembly includes a rotating shaft and a cam; the rotating shaft passes through the insert rod and is rotatable about the axis of the insert rod.

[0023] The cam is located inside the container and is connected to the rotating shaft so as to be driven to rotate by the rotating shaft; the clamping plate abuts against the cam so as to be driven by the cam to make linear motion.

[0024] In one possible implementation, a dustproof component is also included, the dustproof component comprising:

[0025] A rubber sleeve is provided inside the lead wire sleeve, and the rubber sleeve has a constricting end;

[0026] A turntable is disposed on the lead wire sleeve and can rotate around the axis of the lead wire sleeve; the turntable is provided with a central hole and at least one guide groove, the central hole being used for the thermocouple wire to pass through;

[0027] At least one connector, one end of which is connected to the closed end of the rubber sleeve, and the other end is slidably disposed in the guide groove; when the clamping assembly is in the clamped state, the closed end is in contact with the thermocouple wire.

[0028] When installing the thermocouple disclosed in this application, the cover is opened, and the thermocouple wire is first passed through the lead wire sleeve and connected to the thermocouple body. Then, by controlling the lifting assembly, the first and second clamps are used to clamp the thermocouple wire, thereby fixing and supporting the thermocouple wire and preventing it from loosening due to downward pull. When disassembly is required, the lifting assembly is controlled to release the first and second clamps from the thermocouple wire, allowing for thermocouple maintenance or disassembly.

[0029] Compared to related technologies, the thermocouple disclosed in this application, through the design of adding clamping components, can automatically adapt to transmission wires of different diameters and fix and support the thermocouple wiring. It does not rely on traditional wire knotting methods, effectively avoiding the problem of loose wiring caused by the tension of the transmission line sagging, ensuring stable temperature measurement signal transmission, and providing reliable data support for the start-up, shutdown, load regulation and fault early warning of thermal power plant thermal systems. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a perspective view of the thermocouple disclosed in the embodiments of this application;

[0032] Figure 2 This is a schematic diagram of the structure of the thermocouple disclosed in the embodiments of this application. Figure 1 ;

[0033] Figure 3 This is a schematic diagram of the structure of the thermocouple disclosed in the embodiments of this application. Figure 2 ;

[0034] Figure 4 This is a schematic diagram of the lifting assembly disclosed in the embodiments of this application;

[0035] Figure 5 The embodiments disclosed in this application Figure 4 A magnified view of a portion of point A in the middle;

[0036] Figure 6 This is a cross-sectional view of the hydraulic cylinder disclosed in the embodiments of this application;

[0037] Figure 7 This is a cross-sectional view of the lead wire sleeve disclosed in the embodiments of this application;

[0038] Figure 8 This is a schematic diagram of the structure of the dustproof component and the clamping component disclosed in the embodiments of this application;

[0039] Figure 9 The embodiments disclosed in this application Figure 8 A magnified view of a portion of point B in the middle;

[0040] Figure 10 This is a schematic diagram of the rotating component and the card plate disclosed in the embodiments of this application.

[0041] The attached figures are labeled as follows:

[0042] 100. Thermocouple body; 110. Terminal block;

[0043] 200. Lead wire sleeve;

[0044] 300. Box lid;

[0045] 400 Clamping assembly; 410 First clamping plate; 420 Second clamping plate; 430 Lifting assembly; 431 First piston cylinder; 432 Second piston cylinder; 433 Return spring;

[0046] 500. Thermocouple wiring;

[0047] 600, Column; 610, Inner groove;

[0048] 700, clamping assembly; 710, insert rod; 711, rod body; 712, abutting end; 713, square compartment; 720, outer sleeve rod; 721, opening slot; 730, rotating assembly; 731, rotating shaft; 732, cam;

[0049] 800, Limiting component; 810, Toothed plate; 811, Tooth; 820, Compression spring; 830, Clamping plate; 831, Protruding rod; 840, Tension spring;

[0050] 900. Dustproof component; 910. Rubber sleeve; 920. Turntable; 921. Guide groove; 930. Connector. Detailed Implementation

[0051] The purpose of this application is to disclose a thermocouple to improve the stability of thermocouple measurement signal transmission.

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] See Figures 1 to 10 The thermocouple disclosed in this application includes a thermocouple body 100, a cover 300, a lead wire sleeve 200, and a clamping assembly 400.

[0054] The structural principle of the thermocouple body 100 is based on existing technology and will not be elaborated further here. The thermocouple body 100 has a terminal block 110 inside, and its housing is connected to the lead wire sleeve 200. The lead wire sleeve 200 has a through-type wiring channel that connects to the inner cavity of the thermocouple body 100. The thermocouple body 100 is connected to the thermocouple wire 500 via the terminal block 110, and the thermocouple wire 500 extends out from the lead wire sleeve 200. The cover 300 is detachably connected to the thermocouple body 100, facilitating opening the cover 300 for maintenance or disassembly. When the thermocouple is in use, the cover 300 is closed to prevent dust from entering the thermocouple body 100.

[0055] The clamping assembly 400 includes a lifting assembly 430, a first clamping plate 410, and a second clamping plate 420. Along the cable exit path, the first clamping plate 410 and the second clamping plate 420 are positioned between the terminal block 110 and the lead-out sleeve 200. The lifting assembly 430 can at least drive the first clamping plate 410 and the second clamping plate 420 to move closer together to clamp the thermocouple cable 500. Specifically, the lifting assembly 430 can employ threaded drive, and the second clamping plate 420 is threadedly connected to a screw. During operation, rotating the screw causes the first clamping plate 410 and the second clamping plate 420 to move closer together. It should be noted that the driving method of the lifting assembly 430 includes, but is not limited to, threaded drive or hydraulic drive; those skilled in the art can design it according to their needs.

[0056] To protect the thermocouple wire 500, an arc-shaped plate can be provided on the inner side of the first clamping plate 410 and the second clamping plate 420, with its concave surface contacting the thermocouple wire 500 to increase the contact area. This design ensures that the pressure is evenly distributed on a section of the arc surface of the conductor, reducing the risk of pressure damage to the surface of the thermocouple wire 500, maintaining its integrity, and extending the service life of the wire. Furthermore, the enveloping clamping of the arc-shaped plate ensures that the thermocouple wire 500 is tightly constrained by the arc surface in any direction, making it difficult for even minor radial movement to occur, thus providing excellent vibration resistance and anti-loosening capabilities.

[0057] When installing the thermocouple disclosed in this application, the cover 300 is opened, and the thermocouple wire 500 is first passed through the lead wire sleeve 200 and connected to the thermocouple body 100. Then, by controlling the lifting assembly 430, the first clamping plate 410 and the second clamping plate 420 are clamped to secure and support the thermocouple wire 500, preventing it from loosening due to downward pulling force. When disassembly is required, the lifting assembly 430 is controlled to release the first clamping plate 410 and the second clamping plate 420 from the thermocouple wire 500, allowing for thermocouple maintenance or disassembly.

[0058] Compared to related technologies, the thermocouple disclosed in this application, through the addition of a clamping component 400, can automatically adapt to transmission wires of different diameters and fix and support the thermocouple wiring 500. It does not rely on traditional wire knotting methods, effectively avoiding the problem of loose wiring caused by the tension of the transmission line sagging, ensuring stable temperature measurement signal transmission, and providing reliable data support for the start-up, shutdown, load regulation, and fault early warning of thermal power plant thermal systems.

[0059] In one specific embodiment, the lifting assembly 430 includes a first piston cylinder 431 and a second piston cylinder 432, see [link to previous embodiment]. Figure 4 and Figure 6 The first piston cylinder 431 and the second piston cylinder 432 are both fixedly mounted on the terminal block 110. The rod chambers of both piston cylinders 431 and 432 are located on the side closest to the cover 300, and the rodless chambers of the first piston cylinder 431 and 432 are connected. The first clamping plate 410 can be fixedly disposed inside the thermocouple body 100, and the second clamping plate 420 is located on the side of the first clamping plate 410 away from the cover 300. The piston rod of the second piston cylinder 432 is connected to the second clamping plate 420.

[0060] When the thermocouple is in use, the first clamping plate 410 is positioned above and the second clamping plate 420 is positioned below. To clamp the thermocouple connection 500, a force is applied from above to push the piston rod of the first piston cylinder 431. Since the rodless chamber of the first piston cylinder 431 and the rodless chamber of the second piston cylinder 432 are connected, the piston rod of the first piston cylinder 431 pressurizes the working medium in the rodless chamber of the first piston cylinder 431 to the rodless chamber of the second piston cylinder 432, causing the piston rod of the second piston cylinder 432 to extend. This, in turn, drives the second clamping plate 420 upwards, reducing the distance between the first clamping plate 410 and the second clamping plate 420 until they clamp the thermocouple connection 500. This design eliminates easily loosened moving parts such as threaded joints, and the clamping force, once established, can be maintained for a long time, solving the problem of connection loosening caused by vibration. Moreover, operators do not need to use specific wrenches or torque tools, making the operation simple and labor-saving. The core power component, the piston cylinder, is technologically mature, has a long lifespan, and a low failure rate, greatly improving the overall reliability and service life of the equipment.

[0061] To avoid positional displacement caused by unilateral clamping, the first clamping plate 410 can be connected to the piston rod of the first piston cylinder 431, with the piston rods of the first piston cylinder 431 and the second piston cylinder 432 parallel. Pushing the piston rod of the first piston cylinder 431 causes the first clamping plate 410 to move downwards while the second clamping plate 420 moves upwards, symmetrically clamping the thermocouple wire 500. This design automatically aligns the centerline of the thermocouple wire 500 with the center of symmetry of the two clamping plates. This ensures that the thermocouple wire 500 is clamped in the exact center, with symmetrical contact and uniform force. Furthermore, the simultaneous movement of the first clamping plate 410 and the second clamping plate 420 shortens the unilateral travel, resulting in faster clamping and higher work efficiency.

[0062] To improve operating speed and efficiency, the thermocouple of this application also includes a return spring 433 and a clamping assembly 700, see [link to relevant documentation]. Figure 5 One end of the return spring 433 acts on the first clamping plate 410, and the other end acts on the cylinder body of the first piston cylinder 431. The clamping assembly 700 is connected to the cover 300.

[0063] When the cover 300 is placed on the thermocouple body 100, the clamping assembly 700 pushes the piston rod of the first piston cylinder 431 downwards, compressing the return spring 433. Since the first clamping plate 410 is connected to the piston rod of the first piston cylinder 431, and the second clamping plate 420 is located below the first clamping plate 410, the first clamping plate 410 and the second clamping plate 420 will move closer to each other, clamping the thermocouple wire 500. Then, the cover 300 is fixed to the thermocouple body 100 by means of buckles or locking pins, thereby realizing the installation of the thermocouple. When the cover 300 is opened, the pushing force of the clamping assembly 700 on the piston rod of the first piston cylinder 431 disappears. Under the action of the elastic force of the return spring 433, the first clamping plate 410 and the second clamping plate 420 move away from each other, releasing the thermocouple wire 500. The thermocouple in this design has a reset spring 433 that immediately and actively pushes the first clamp 410 and the second clamp 420 back to their original positions, thereby loosening the thermocouple wiring 500. The response is rapid, and there is no need for manual reset by the operator. The operation is also simple, as long as the box cover 300 is opened or closed, which greatly shortens the time for replacing or maintaining thermocouples and improves work efficiency.

[0064] To optimize space utilization, the thermocouple also includes a column 600, a limiting component 800, and a drive component. The column 600 is disposed inside the thermocouple body 100 and is fixedly connected to the terminal block 110. The limiting component 800, such as a pawl, latch, or rotary lock, includes at least a locked position and a released position. When the limiting component 800 is in the locked position, the column 600 and the clamping component 700 are fixed to each other; when the limiting component 800 is in the released position, the column 600 and the clamping component 700 can move relative to each other. The drive component is used to drive the limiting component 800 to move between the locked and released positions.

[0065] The clamping assembly 700 inside the lid 300 pushes the piston rod of the first piston cylinder 431 to automatically perform a clamping operation. When the lid 300 is closed in place, the internal limiting assembly 800 locks it in place. When the lid 300 is opened, the drive assembly is operated, such as by rotating to release, releasing the locking assembly 800. Under the action of the return spring 433, the device automatically releases the thermocouple wire 500, and the lid 300 is slightly lifted. The locking components of this design are all hidden inside the box body, eliminating the need for protruding screws, hinges, or external locks to fix the lid 300. The entire device structure is more compact, neat, and has a high space utilization rate.

[0066] In one specific implementation, the limiting component 800 may include a toothed plate 810, a compression spring 820, and a locking plate 830, such as Figure 5 As shown. The column 600 is provided with an inner recess 610, and the toothed plate 810 is located within the inner recess 610 and can move freely within the inner recess 610. The toothed plate 810 includes a first side and a second side opposite to each other. The first side is provided with teeth 811, and the second side faces the inner recess 610. One end of the compression spring 820 is fixedly connected to the inner recess 610, and the other end is connected to the second side of the toothed plate 810.

[0067] The clamping plate 830 is connected to the clamping assembly 700 and is driven by the driving assembly. When the limiting assembly 800 is in the locked position, the clamping plate 830 engages with the teeth 811; when the limiting assembly 800 is in the locked position, the clamping plate 830 separates from the teeth 811. The teeth 811 and the clamping plate 830 may have trapezoidal cross-sections, with the shorter side of the trapezoidal cross-section of the teeth 811 located on the upper side and the longer side on the lower side. The shorter side of the trapezoidal cross-section of the clamping plate 830 is located on the lower side and the longer side on the upper side. When the clamping plate 830 is pushed downwards by the clamping assembly 700, the teeth 811 and the clamping plate 830 slide relative to each other on the inclined side of the trapezoid, causing the teeth 810 to be compressed, the compression spring 820 to be compressed, and the teeth 810 to retract into the inner groove 610. When the clamping assembly 700 reaches the desired position, the clamping plate 830 engages in the gap between adjacent teeth 811. When the locking plate 830 is subjected to an upward pushing force, it is locked within the gap due to the contact between the long trapezoidal side of the locking plate 830 and the long trapezoidal side of the tooth 811, thus achieving a limiting function. This design achieves mechanical self-locking, reliable locking, and effectively prevents the cover 300 from loosening under continuous vibration, ensuring long-term stability of the connection and durability of the seal.

[0068] To ensure that the clamping assembly 400 can still clamp the thermocouple wire 500 after the cover 300 is opened, the clamping assembly 700 may include an outer sleeve rod 720 and an insert rod 710. The outer sleeve rod 720 is fixedly disposed inside the cover 300 and has a through channel. The insert rod 710 has a rod body 711 and an abutment end 712, which is used to abut against the first clamping plate 410. The rod body 711 passes through the channel of the outer sleeve rod 720 and can move axially along the channel. The radial dimension of the channel is set to be smaller than the radial dimension of the abutment end 712.

[0069] With the limit assembly 800 in the locked position, when the cover 300 is lifted, the insertion rod 710 and the outer rod 720 move relative to each other, with the outer rod 720 moving upwards and the insertion rod 710 remaining stationary. When the cover 300 is pressed downwards, it pushes the outer rod 720 downwards. Because the radial dimension of the abutment end 712 is larger than the dimension of the internal channel of the outer rod 720, the outer rod 720 abuts against the abutment end 712 and pushes the insertion rod 710 downwards together. This design allows the cover 300 to be opened even when the thermocouple wiring 500 is clamped, enabling maintenance personnel to quickly check the wiring status without repeatedly loosening and tightening, thus improving work efficiency.

[0070] In one specific implementation, the drive assembly includes a tension spring 840 and a rotary assembly 730, such as... Figure 9As shown. The outer sleeve rod 720 has an opening slot 721, and the insert rod 710 has a square compartment 713. The opening slot 721 and the square compartment 713 are clearance-fitted with the clamping plate 830. When the outer sleeve rod 720 and the insert rod 710 are engaged, and the outer sleeve rod 720 abuts against the abutting end 712, the square compartment 713 and the opening slot 721 are at the same horizontal position, allowing the clamping plate 830 to move within the opening slot 721 and the square compartment 713.

[0071] One end of the tension spring 840 is connected to the clamping plate 830, and the other end is connected to the container 713. The tension spring 840 drives the clamping plate 830 to move closer to the container 713. The rotating assembly 730 drives the clamping plate 830 to move away from the container 713. When the locking limit assembly 800 needs to be locked, the rotating assembly 730 pushes the clamping plate 830 through the opening slot 721, and the tension spring 840 is stretched, so that the clamping plate 830 engages with the teeth 811. When the locking limit assembly 800 needs to be released, the rotating assembly 730 no longer pushes the clamping plate 830, and under the elastic force of the tension spring 840, the clamping plate 830 is pulled back, thus separating from the teeth 811.

[0072] In one specific embodiment, the rotating assembly 730 includes a rotating shaft 731 and a cam 732, such as Figure 10 As shown. The rotating shaft 731 passes through the insert rod 710 and can rotate around the axis of the insert rod 710. To facilitate the operator's rotation of the rotating shaft 731, an anti-slip knob is provided at the upper end of the rotating shaft 731, which extends from the top of the cover 300. The diameter of the knob is the same as the diameter of the drive shaft 312 to avoid interference when the cover 300 is opened.

[0073] Cam 732 is located within container 713 and is connected to rotating shaft 731 to be driven to rotate by rotating shaft 731. The rotation axis of cam 732 coincides with the rotation axis of rotating shaft 731. Clamping plate 830 may include a main body and a protrusion 831 disposed on the main body. Protrusion 831 abuts against cam 732 to be driven by cam 732.

[0074] When the locking limit assembly 800 is engaged and the box cover 300 needs to be opened, the rotating shaft 731 is rotated so that the top of the cam 732 (the point on the cam 732 profile that is furthest from the rotation center) abuts against the protruding rod 831. The main body of the retaining plate 830 extends from the opening slot 721 and engages with the toothed plate 810. The protruding rod 831 extends into the square compartment 713, thereby fixing the insert rod 710 and the column 600.

[0075] It should be noted that the opening slot 721 on the outer sleeve 720 can be a T-shaped slot. The horizontal slot of the T-shaped slot is in clearance fit with the retaining plate 830, and the vertical slot of the T-shaped slot is open, with the extension direction of the vertical slot parallel to the axial direction of the outer sleeve 720. When the top of the cam 732 abuts against the protrusion 831, the main body of the retaining plate 830 is located outside the opening slot 721, and the protrusion 831 of the retaining plate 830 passes through the opening slot 721. At this time, the outer sleeve 720 moves upward, and the protrusion 831 can move out from the vertical slot of the T-shaped slot, so that the outer sleeve 720 can be removed from the top while the insert rod 710 is fixed, and the cover 300 can be opened.

[0076] When the locking limit component 800 needs to be locked during daily use, the rotating shaft 731 is rotated so that the side of the cam 732 abuts against the protrusion 831. Part of the main body of the clamping plate 830 engages with the toothed plate 810, and part retracts into the opening slot 721. At this time, the protrusion 831 of the clamping plate 830 is still located in the square compartment 713, so that the outer sleeve rod 720 and the column 600 are fixed to each other, and the outer sleeve rod 720 and the insertion rod 710 are also fixed to each other, and cannot move relative to each other.

[0077] When the limit assembly 800 needs to be unlocked, the rotating shaft 731 is rotated so that the bottom end of the cam 732 (the point on the cam 732 profile with the smallest distance from the rotation center) abuts against the protruding rod 831. The main body of the clamping plate 830 is pulled back to the square compartment 713 by the tension spring 840, separating from the toothed plate 810 and completely disengaging from the opening slot 721, so that the column 600, the outer sleeve rod 720 and the insertion rod 710 can all move relative to each other.

[0078] This design enables two opening methods for the cover 300 to meet different maintenance needs. During maintenance, simply rotating the rotating shaft 731 unlocks the outer sleeve 720 and the insertion rod 710, allowing the cover 300 to be opened independently without changing the clamping state of the thermocouple wiring 500, eliminating the need for readjustment. When the transmission line needs to be replaced, continue rotating the rotating shaft 731 to fully retract the clamping plate 830 into the square compartment 713, releasing the limit between the insertion rod 710 and the column 600. Pulling out the cover 300 simultaneously releases the fixation of the thermocouple wiring 500, facilitating easy replacement. Both methods simplify the operation process, significantly shorten maintenance time, and improve the efficiency of thermocouple maintenance.

[0079] To prevent dust from entering the thermocouple body 100 from the lead-out sleeve 200, the thermocouple may also include a dustproof assembly 900. The dustproof assembly 900 includes a rubber sleeve 910, a turntable 920, and at least one connector 930, such as... Figure 7 and Figure 8 As shown.

[0080] A rubber sleeve 910 is disposed within the lead wire sleeve 200, and the rubber sleeve 910 has a constricted end on the side near the clamping assembly 400. A turntable 920 is disposed within the lead wire sleeve 200 and can rotate about the axis of the lead wire sleeve 200. The turntable 920 has a central hole and at least one guide groove 921. The center of the central hole and the center of the rubber sleeve 910 are both located on the center line of the lead wire sleeve 200, so that the thermocouple wire 500 can pass through the rubber sleeve 910 and the central hole. The guide groove 921 is disposed on the side of the turntable 920 near the clamping assembly 400. There is an included angle between the extending direction of the guide groove 921 and the radial direction of the turntable 920. One end of the connector 930 is connected to the constricted end of the rubber sleeve 910, and the other end is slidably disposed within the guide groove 921. One of the connectors 930 is connected to the first clamping plate 410 via a connecting rod.

[0081] When the first clamping plate 410 is driven to move linearly by the lifting assembly 430, the connecting piece 930 is also driven to move linearly, causing one end of the connecting piece 930 to slide within the guide groove 921. Since there is an angle between the extension direction of the guide groove 921 and the radial direction of the turntable 920, the connecting piece 930 generates a force on the groove wall of the guide groove 921 that causes the turntable 920 to rotate, thereby driving the turntable 920 to rotate. The remaining connecting pieces 930 are driven to rotate by the turntable 920 and converge towards the center of the turntable 920, causing the closing end of the rubber sleeve 910 to rotate and contract until the first clamping plate 410 clamps the thermocouple wire 500, and the closing end of the rubber sleeve 910 is in contact with the thermocouple wire 500. The rubber sleeve 910 of this design can form a conical sealing structure, automatically adjusting the sealing range according to the diameter of the transmission line, sealing the gap between the lead wire sleeve 200 and the thermocouple body 100, preventing dust in the thermal power plant environment from entering the thermocouple body 100 and corroding components such as the terminal block, thereby extending the service life of the device.

[0082] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order, and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. 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 device that includes a series of steps or units may include steps or units not listed, but rather steps or units not listed. Additionally, in the description of embodiments in this application, "a plurality of" means two or more.

[0083] In the description of this application, it should be understood that the terms "height," "thickness," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, "a plurality of" means two or more, and "at least one" can mean one, two, or more, unless otherwise expressly specified.

[0084] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Specific technical means in some embodiments may be incorporated, in whole or in part, into another embodiment unless explicitly excluded by another embodiment. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A thermocouple, characterized by, The thermocouple includes a thermocouple body (100), a box cover (300), a lead sleeve (200) and a clamping assembly (400); The box cover (300) is detachably connected with the thermocouple body (100), the lead sleeve (200) is in communication with the inner cavity of the thermocouple body (100) and is used for passing the thermocouple wire (500); the thermocouple body (100) is internally provided with a wire terminal (110) connected with the thermocouple wire (500); The clamping assembly (400) includes a lifting assembly (430), a first clamping plate (410) and a second clamping plate (420); along the wire outlet path, the first clamping plate (410) and the second clamping plate (420) are arranged between the wire terminal (110) and the lead sleeve (200), and the lifting assembly (430) can at least drive the first clamping plate (410) and the second clamping plate (420) to move towards each other to clamp the thermocouple wire (500).

2. The thermocouple of claim 1, wherein, The lifting assembly (430) includes a first piston cylinder (431) and a second piston cylinder (432), the rod cavities of the first piston cylinder (431) and the second piston cylinder (432) are located on the side close to the box cover (300), the rodless cavities of the first piston cylinder (431) and the second piston cylinder (432) are in communication, the second clamping plate (420) is located on the side of the first clamping plate (410) away from the box cover (300), and the piston rod of the second piston cylinder (432) is connected with the second clamping plate (420).

3. The thermocouple of claim 2, wherein, The first clamping plate (410) is connected with the piston rod of the first piston cylinder (431), and the piston rods of the first piston cylinder (431) and the second piston cylinder (432) are parallel.

4. The thermocouple of claim 3, wherein, Further comprising a reset spring (433) and a pressing assembly (700); The pressing assembly (700) is connected with the box cover (300), in the case that the box cover (300) is in an assembled state, the pressing assembly (700) pushes the piston rod of the first piston cylinder (431) towards the direction from the first clamping plate (410) to the second clamping plate (420) and compresses the reset spring (433), so that the first clamping plate (410) and the second clamping plate (420) clamp the thermocouple wire (500).

5. The thermocouple of claim 4, wherein, Further comprising a stand column (600), a limiting assembly (800) and a driving assembly, the stand column (600) is fixedly connected with the wire terminal (110); The limiting assembly (800) at least includes a locking position and a release position, when the limiting assembly (800) is in the locking position, the stand column (600) and the pressing assembly (700) are fixedly connected with each other; when the limiting assembly (800) is in the release position, the stand column (600) and the pressing assembly (700) can relatively move; the driving assembly is used for driving the limiting assembly (800) to move between the locking position and the release position.

6. The thermocouple of claim 5, wherein, The stand (600) is provided with a retraction groove (610), and the limiting assembly (800) comprises a toothed plate (810), a compression spring (820) and a clamping plate (830); The toothed plate (810) is located in the retraction groove (610) and comprises a first side and a second side, the first side is provided with a tooth (811); one end of the compression spring (820) is connected with the second side, and the other end is connected with the retraction groove (610); the clamping plate (830) is connected with the compression assembly (700); when the limiting assembly (800) is in the locking position, the clamping plate (830) cooperates with the tooth (811); when the limiting assembly (800) is in the release position, the clamping plate (830) is separated from the tooth (811).

7. The thermocouple of claim 6, wherein, The compression assembly (700) comprises a sleeve rod (720) and an insertion rod (710); The sleeve rod (720) is fixedly arranged on the inner side of the box cover (300), and a through channel is arranged in the sleeve rod (720); The insertion rod (710) is formed with a rod body (711) and an abutting end (712), the abutting end (712) is used for abutting against the first clamping plate (410); the rod body (711) is arranged in the channel of the sleeve rod (720) and can move along the axial direction of the channel; the radial dimension of the channel is smaller than that of the abutting end (712); the limiting assembly (800) is connected with the insertion rod (710).

8. The thermocouple of claim 7, wherein, The driving assembly comprises a tension spring (840) and a rotating assembly (730); the sleeve rod (720) is provided with an opening slot (721), and the insertion rod (710) is provided with a square cavity (713); the opening slot (721) and the square cavity (713) are gap-fitted with the clamping plate (830); One end of the tension spring (840) is connected with the clamping plate (830), and the other end is connected with the square cavity (713); the tension spring (840) drives the clamping plate (830) to move towards the square cavity (713); the rotating assembly (730) drives the clamping plate (830) to move away from the square cavity (713).

9. The thermocouple of claim 8, wherein, The rotating assembly (730) comprises a rotating shaft (731) and a cam (732); the rotating shaft (731) is arranged in the insertion rod (710) and can rotate around the axis of the insertion rod (710); The cam (732) is located in the square cavity (713), and the cam (732) is connected with the rotating shaft (731) and is driven to rotate by the rotating shaft (731); the clamping plate (830) abuts against the cam (732) and is driven to move linearly by the cam (732).

10. The thermocouple of any one of claims 1-9, wherein, Further comprising a dustproof assembly (900), the dustproof assembly (900) comprises: A rubber sleeve (910) is arranged in the lead-out wire sleeve (200), and the rubber sleeve (910) is provided with a closed end; A rotating disc (920) is arranged in the lead-out sleeve (200) and can rotate around the axis of the lead-out sleeve (200); the rotating disc (920) is provided with a central hole and at least one guide slot (921), and the central hole is used for passing the thermocouple wire (500) therethrough; At least one connecting piece (930) is arranged in the guide slot (921) and one end of the connecting piece (930) is connected with the closed end of the rubber sleeve (910) and the other end is slidably arranged in the guide slot (921); when the clamping assembly (400) is in the clamped state, the closed end is in close contact with the thermocouple wire (500).

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