Device and method for detecting temperature in annealing furnace for bolt heat treatment

Abstract

The invention belongs to the technical field of heat treatment, particularly relates to a device and a method for detecting the temperature in an annealing furnace for bolt heat treatment, and aims to solve the problem that the measured temperature and the actual temperature are easy to deviate due to failure of a temperature measuring device when the device is arranged at a certain fixed point for a long time to measure the temperature. Comprising a mounting base integrally of a long-strip-shaped structure, a rectangular sliding groove consistent with the length direction is reserved in the middle of the upper surface of the mounting base, a conveying chain belt is arranged in the rectangular sliding groove, and a heat preservation cover is fixed to the upper portion of the mounting base; a plurality of heating devices are arranged on the top inner wall of the heat preservation cover, and an anti-disengagement sliding groove extending in the width direction of the mounting base is formed in the middle of the lower surface of the mounting base. In the annealing process, ultra-close distance temperature measurement can be alternately carried out on the surface of the conveying chain belt, if the temperature difference between the two measured temperatures is not large, the average value can be obtained, and therefore the situation that the difference between the measured temperature and the actual temperature is too large due to damage of one of the two temperatures can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment, and particularly to a temperature detection device and method in an annealing furnace for bolt heat treatment. Background Art

[0002] The temperature detection of an annealing furnace is an important industrial process control link, especially in the fields of metal processing, heat treatment, etc. The annealing furnace is used to heat metal materials (such as steel, copper, aluminum, etc.), keep them at a specific temperature for a period of time, and then slowly cool them to achieve the purpose of improving the internal structure of the metal, and enhancing physical properties and mechanical properties. The accurate control of temperature has a great impact on the quality and performance of the metal; the temperature uniformity of the annealing furnace is crucial because uneven temperature may lead to inconsistent annealing effects of the metal material, thereby affecting the product quality; the temperature change can be monitored and adjusted by setting temperature sensors at multiple points in the furnace.

[0003] After retrieval, in the prior art, in order to accurately detect the actual temperature at each position, the device for measuring the temperature in the furnace usually installs a lot of temperature measuring devices on the inner wall of the furnace, so that the actual temperature of each area of the heating furnace can be known according to the data reflected by each temperature measuring device during actual use, thus facilitating the control of the intake air volume, that is, the high and low temperature; however, this kind of temperature measuring device is relatively costly in terms of temperature measuring devices, and once a certain temperature measuring device ages or the temperature measurement is inaccurate, it is very difficult to detect, and then the measured temperature deviates. Aiming at the problem that long-term temperature measurement at a fixed point is likely to cause a deviation between the measured temperature and the actual temperature due to the failure of the temperature measuring device, a new type of measuring device and method are provided. Summary of the Invention

[0004] Aiming at the technical problem that long-term temperature measurement at a fixed point is likely to cause a deviation between the measured temperature and the actual temperature due to the failure of the temperature measuring device, the present invention adopts the following technical solutions: A temperature detection device inside an annealing furnace for bolt heat treatment, comprising an installation base with an overall elongated structure. In the middle of the upper surface of the installation base, a rectangular chute consistent with the length direction is reserved, and a conveyor chain belt is arranged inside the rectangular chute. A heat preservation cover is fixed above the installation base; and a plurality of heating devices are arranged on the top inner wall of the heat preservation cover. In the middle of the lower surface of the installation base, an anti - detachment chute extending along the width direction of the installation base is opened, and an intermittent pushing mechanism is arranged in the anti - detachment chute. The intermittent pushing mechanism includes a sliding plate strip slidably connected in the anti - detachment chute. At both ends of the sliding plate strip, symmetrically arranged L - shaped baffles are respectively provided. Between the two L - shaped baffles near the top, symmetrically arranged and collinear temperature measuring mechanisms are respectively fixed. The temperature measuring mechanism includes a temperature measuring push tube slidably inserted on the side surface of the heat preservation cover and located above the conveyor chain belt as a whole. At the lower surface of one end of the temperature measuring push tube near the middle of the conveyor chain belt, strip - shaped through - holes are opened. At the end of the strip - shaped through - hole at the bottom inner wall of the temperature measuring push tube, a hinge frame is fixed, and the hinge frame is located at one end close to the L - shaped baffle. A rotating rod capable of passing through the strip - shaped through - hole is hinged in the hinge frame. A groove is opened on the upper surface of the rotating rod, and a thermocouple is clamped at the bottom end of the groove.

[0005] Further setting is that at the opening of one end of the two temperature measuring push tubes facing each other, plugs are respectively fixed, and on one side of the two plugs facing each other, open - circuit shovel plates are respectively fixed. One end of the open - circuit shovel plate away from the plug is attached to the upper surface of the conveyor chain belt, and on one side of the side surface of the open - circuit shovel plate close to the plug, a triangular pyramid is fixed. The triangular surface of the triangular pyramid is flush with the bottom surface of the open - circuit shovel plate, which can prevent pulling the fastener back to the edge during the retraction process.

[0006] Further setting is that in the middle of the upper surface of the rotating rod, a pressing spring is fixed, and the top end of the pressing spring is fixed on the top inner wall of the temperature measuring push tube; a fire - proof and heat - insulating tube is sleeved on the outer wall of the wire of the thermocouple, which can quickly push the end of the rotating rod with the thermocouple to the surface of the conveyor chain belt when the temperature - measuring end of the temperature measuring push tube extends into the inside of the heat preservation cover.

[0007] Further setting is that vertical chamber baffles are respectively fixed near both ends of the top inner wall of the heat preservation cover. An air inlet pipe is inserted behind the heating device in each chamber, and the bottom opening of the heat preservation cover is fixed on the upper surface of the installation base near the four edges. At both ends of the bottom of the heat preservation cover near the conveyor chain belt, gaps for feeding and discharging are respectively reserved; above the gap at the inlet, an adjusting gate is fixed, which can adjust the laying thickness of the fasteners entering the internal heating, thereby preventing uneven heating caused by excessive stacking of fasteners.

[0008] Further settings are as follows. Two observation windows are reserved near the middle of the front surface of the heat preservation cover, and vacuum glass is arranged in the observation windows. A heat insulation layer is arranged on the outer wall of the heat preservation cover; on the upper surface of the installation base, groove-shaped slide rails that open upward and form a sliding fit with the temperature measuring push tubes on the corresponding sides are fixed near the front and rear sides; the actual operating state inside can be observed during use.

[0009] Further settings are as follows. Support legs are fixed near the edges of the front and rear sides of the lower surface of the installation base; a same horizontal X-shaped fixing frame is fixed among the four support legs in the middle, and a bearing seat one is fixed in the middle of the X-shaped fixing frame. An anti-detachment bearing is embedded in the middle of the bearing seat one, and a transmission shaft is rotatably connected in the middle of the anti-detachment bearing; a rotating plate and a driven gear are respectively fixed at the upper and lower ends of the transmission shaft; a vertical convex shaft is fixed on the upper surface of the rotating plate away from the transmission shaft; and the intermittent pushing mechanism further includes a strip-shaped hole frame fixed on the lower surface of the sliding plate strip, and the extending direction of the strip-shaped hole frame is consistent with the extending direction of the conveyor chain belt; and the convex shaft is slidably connected in the strip-shaped hole frame; horizontal and parallel guiding slide rods are fixed at both ends of the sliding plate strip, and slide holes adapted to the guiding slide rods are opened on the horizontal rods of the L-shaped hinge seats; compression springs are fixed between both ends of the sliding plate strip and the L-shaped hinge seats on the corresponding sides.

[0010] Further settings are as follows. A motor frame is fixed on the side surface of one of the support legs near the discharge section, and a reduction motor is fixed on the upper surface of the motor frame by bolts. A transmission rod is fixed at the top end of the output shaft of the reduction motor through a coupling; and a worm sleeve is fixed at the end of the transmission rod away from the reduction motor; a fixed hanging bracket is fixed on the lower surface of the installation base near the worm sleeve, and a bearing seat two is fixed at the bottom end of the fixed hanging bracket. A vertical short shaft rod is arranged in the bearing seat two, and a large worm wheel disc that meshes with both the driven gear and the worm sleeve at the same time is fixed at the bottom end of the short shaft rod; making the driving end more labor-saving and safe.

[0011] Further settings are as follows. Air supply mechanisms are arranged below the front and rear ends of the X-shaped fixing frame, and each air supply mechanism includes an air bucket fixed on the side surface of the support leg with an opening facing the driven gear. Piston plates are slidably connected in the two air buckets, and connecting rods are hinged on the opposite sides of the two piston plates. The two connecting rods are horizontally arranged and have different heights. The ends of the two connecting rods close to the driven gear are fixed to the same movable shaft, and the movable shaft is fixed on the lower surface of the driven gear near the edge; one-way air outlet valves are inserted at the bottom of the two air buckets; and the air outlet ends of the two one-way air outlet valves are inserted with air supply hoses, and the other ends of the air supply hoses are inserted into the interiors of the temperature measuring push tubes on the corresponding sides; and inclined downward strip-shaped air holes are opened in the middle of the plugs; air supply can be carried out when the temperature measuring mechanism on the corresponding side is retracted as a whole. It can not only dissipate heat from the surface of the retracted thermocouple, but also the excess air can compensate for the oxygen required for internal combustion.

[0012] Further, it is provided that a material turning mechanism is arranged at one end of the installation base close to the reduction motor. The material turning mechanism includes an installation notch opened on the side surface of the installation base. An L-shaped hinge seat with an L-shaped cross-section is fixed in the installation notch through bolts. A sliding bearing is rotatably connected in the L-shaped hinge seat. Two radially arranged folded spoke rods are fixed on the circumferential outer wall of the sliding bearing. The same arc-shaped impact rod is fixed at one end of the two folded spoke rods away from the sliding bearing. A rectangular hole is opened at the top end of the installation base where the folded spoke rods are located. A striking rod is hinged at one end of the rectangular hole away from the folded spoke rods, and a limiting plate is arranged below the striking rod. A return spring is fixed on the lower surface of the horizontal plate of the L-shaped hinge seat, and the bottom end of the return spring is fixed on the upper surface of the folded spoke rod close to the top end. An intermittent gear meshing with the arc-shaped impact rod is fixed on the transmission rod. When in use, when the fasteners reach the second half of the annealing furnace, part of the fasteners can be displaced with the arrangement of the material turning mechanism, preventing uneven heat dissipation in the later stage due to stacking together.

[0013] A method for detecting the temperature inside an annealing furnace for bolt heat treatment, including the temperature detection device inside an annealing furnace for bolt heat treatment as described in the claims, includes the following steps: S1: Before use, first adjust the height between the bottom end of the regulating gate at the entrance of the heat preservation cover and the upper surface of the conveyor belt to ensure that a single layer of bolts can pass through smoothly. S2: Start the power source of the intermittent pushing mechanism, i.e., the reduction motor. At this time, with a series of transmissions of the transmission rod and the driven gear, the temperature measuring push tubes in the two temperature measuring mechanisms alternately push towards the middle of the upper surface of the conveyor belt. When one end of the temperature measuring push tube with the rotating rod and the thermocouple extends into the interior of the heat preservation cover, at this time, the end carrying the thermocouple quickly droops to the surface of the bolt. As the temperature measuring push tube continues to advance and is about to reach the middle of the conveyor belt, it will stop for a period of time for stable temperature measurement. After the continuous rotation of the rotating plate, the temperature measuring push tube is retracted, and at this time, the other temperature measuring mechanism repeats the steps of the previous temperature measuring mechanism. S3: When the temperature measuring mechanism retracts, it will drive the air supply mechanism on the same side to start. At this time, air is continuously blown into the interior of the temperature measuring push tube through the air supply hose to dissipate heat from the surface of the retracted thermocouple, and the excess air can also compensate for the oxygen required for internal combustion.

[0014] The beneficial effects in the present invention are: 1. By means of two sets of temperature measuring mechanisms provided, in cooperation with the thermocouple fixed at the drooping end of the rotating rod, during the annealing process, the surface of the conveyor chain belt can be measured for temperature at ultra-close range alternately. If the temperature difference after the two measurements is not large, the average value can be taken, thus avoiding a too large difference between the measured temperature and the actual temperature caused by the damage of one of them. And when one of them is measuring, the other can be retracted into the temperature measuring push tube, preventing the temperature measuring mechanism from being in a high-temperature state all the time and improving the service life of the thermocouple.

[0015] 2. By means of the open circuit shovel plate provided, in cooperation with the reciprocating temperature measuring push tube, the annealed fasteners can be slowly turned over while measuring the temperature, so that the fasteners can be heated evenly, preventing uneven heating caused by stacking. Moreover, the bottom end of the rotating rod with the thermocouple hanging freely can be made to contact the surface of the conveyor chain belt, thus directly measuring the temperature of the fasteners on the surface of the conveyor chain belt.

[0016] 3. By means of the rotating plate with a convex shaft and the compression springs at both ends of the sliding plate strip, in cooperation with the setting of the strip-shaped hole frame, when driving the temperature measuring mechanism to insert into the position near the middle of the heat preservation cover, it can pause for a period of time, which is the best measurement time at this moment. Moreover, the driven gear used for driving only needs to keep rotating rapidly, which is convenient for control and not prone to failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic diagram of the overall structure of a temperature detection device in an annealing furnace for bolt heat treatment proposed by the present invention; Figure 2 FIG. is a schematic diagram of the bottom-up three-dimensional structure of a temperature detection device in an annealing furnace for bolt heat treatment proposed by the present invention; Figure 3 FIG. is the front view of a temperature detection device in an annealing furnace for bolt heat treatment proposed by the present invention; Figure 4 A temperature detection device in an annealing furnace for bolt heat treatment proposed by the present invention Figure 3 FIG. is a schematic cross-sectional structure diagram along line A-A in the device; Figure 5 FIG. is the side view of a temperature detection device in an annealing furnace for bolt heat treatment proposed by the present invention; Figure 6 A temperature detection device in an annealing furnace for bolt heat treatment proposed by the present invention Figure 5 FIG. is a schematic cross-sectional structure diagram along line B-B in the device; Figure 7 FIG. is a schematic cross-sectional structure diagram of the turning mechanism of a temperature detection device in an annealing furnace for bolt heat treatment proposed by the present invention; Figure 8Schematic structural diagram of the temperature detection device in the annealing furnace for bolt heat treatment proposed by the present invention after removing the heat preservation cover; Figure 9 Exploded structural diagram of the bearing seat one and the air supply mechanism in the temperature detection device in the annealing furnace for bolt heat treatment proposed by the present invention; Figure 10 Assembly structural diagram of the intermittent pushing mechanism of the temperature detection device in the annealing furnace for bolt heat treatment proposed by the present invention; Figure 11 Partial sectional structural diagram of the temperature measurement push tube in the temperature detection device in the annealing furnace for bolt heat treatment proposed by the present invention.

[0018] In the figure: 1. Installation base; 101. Anti - detachment sliding groove; 102. Rectangular hole; 103. Installation notch; 2. Conveyor chain belt; 3. Support leg; 4. X - shaped fixing frame; 5. Air supply mechanism; 501. Air barrel; 502. One - way air outlet valve; 503. Piston plate; 504. Connecting rod; 505. Air supply hose; 6. Reduction motor; 7. Material turning mechanism; 701. L - shaped hinge seat; 702. Folded spoke rod; 703. Arc - shaped impact rod; 704. Intermittent gear; 705. Reset tension spring; 8. Heat preservation cover; 801. Observation window; 802. Chamber baffle; 9. Grooved slide rail; 10. Temperature measurement mechanism; 1001. Temperature measurement push tube; 1002. Strip - shaped perforation; 1003. Plug; 1004. Tightening spring; 1005. Hinge frame; 1006. Rotating rod; 1007. Thermocouple; 11. Inlet pipe; 1101. Heating device; 12. Heat insulation layer; 13. Motor frame; 14. Transmission rod; 15. Worm gear sleeve; 16. Driven gear; 17. Large worm wheel disc; 18. Rotating plate; 19. Transmission shaft; 20. Bearing seat one; 21. Intermittent pushing mechanism; 2101. Strip - shaped hole frame; 2102. Guide slide rod; 2103. Compression spring; 22. Open - circuit shovel plate; 2201. Triangular pyramid; 23. Fixed hanging bracket; 24. Short shaft rod; 25. L - shaped baffle; 26. Convex shaft. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0020] In this embodiment, with reference to Figures 1-11, A temperature detection device for an annealing furnace used in bolt heat treatment, which includes an installation base 1 with an overall long strip-shaped structure. A rectangular chute consistent with the length direction is reserved in the middle of the upper surface of the installation base 1, and a conveyor chain belt 2 that slides on the bottom of the rectangular chute is arranged in the rectangular chute. A heat preservation cover 8 that covers the conveyor chain belt 2 is fixed above the installation base 1; and a plurality of heating devices 1101 are arranged on the top inner wall of the heat preservation cover 8. A anti-disengagement chute 101 extending along the width direction of the installation base 1 is opened in the middle of the lower surface of the installation base 1, and an intermittent pushing mechanism 21 is arranged in the anti-disengagement chute 101; the intermittent pushing mechanism 21 includes a sliding plate strip slidably connected in the anti-disengagement chute 101. Symmetric L-shaped baffles 25 are respectively arranged at both ends of the sliding plate strip. Symmetric and collinear temperature measuring mechanisms 10 are respectively fixed between the two L-shaped baffles 25 near the top. The temperature measuring mechanism 10 includes a temperature measuring push tube 1001 that is slidably inserted into the side of the heat preservation cover 8 and is located above the conveyor chain belt 2 as a whole; bar-shaped through holes 1002 are opened on the lower surface of the end of the temperature measuring push tube 1001 close to the middle of the conveyor chain belt 2. A hinge frame 1005 is fixed on the bottom inner wall of the temperature measuring push tube 1001 at the end of the bar-shaped through hole 1002, and the hinge frame 1005 is located at one end close to the L-shaped baffle 25. A rotating rod 1006 that can pass through the bar-shaped through hole 1002 is hinged in the hinge frame 1005. A groove is opened on the upper surface of the rotating rod 1006, and a thermocouple 1007 is clamped at the bottom end of the groove; specifically, through the two sets of temperature measuring mechanisms 10 provided, in cooperation with the thermocouple 1007 fixed at the drooping end of the rotating rod 1006, during the annealing process, the surface of the conveyor chain belt 2 can be measured at an ultra-close distance alternately. If the temperature difference after the two measurements is not large, the average value can be taken, so as to avoid the large difference between the measured temperature and the actual temperature caused by the damage of one of them; and when one of them is measuring, the other can be retracted into the temperature measuring push tube 1001 to prevent the temperature measuring mechanism 10 from being in a high temperature state all the time, and the service life of the thermocouple 1007 is improved.

[0021] Refer to Figure 11, at the open ends of the opposite ends of the two temperature-measuring push tubes 1001, plugs 1003 are fixed, and on the opposite sides of the two plugs 1003, open-circuit shovel plates 22 are fixed. One end of the open-circuit shovel plate 22 away from the plug 1003 is attached to the upper surface of the conveyor chain belt 2, and on the side of the open-circuit shovel plate 22 close to the plug 1003, a triangular pyramid 2201 is fixed. The triangular surface of the triangular pyramid 2201 is flush with the bottom surface of the open-circuit shovel plate 22, which can prevent the fasteners from being pulled back to the edge during the retraction process; through the set open-circuit shovel plate 22, in cooperation with the reciprocating temperature-measuring push tube 1001, the annealed fasteners can be slowly turned over while measuring the temperature, so that the fasteners can be evenly heated, preventing uneven heating caused by stacking, and enabling the bottom end of the rotating rod 1006 carrying the thermocouple 1007 to contact the surface of the conveyor chain belt 2 when freely hanging down, and then the temperature of the fasteners on the surface of the conveyor chain belt 2 can be directly measured.

[0022] Refer to Figure 11 , in the middle of the upper surface of the rotating rod 1006, a pressing spring 1004 is fixed, and the top end of the pressing spring 1004 is fixed to the top inner wall of the temperature-measuring push tube 1001; a fireproof and heat-insulating tube is sleeved on the outer wall of the wire of the thermocouple 1007, which can quickly push the end of the rotating rod 1006 with the thermocouple 1007 to the surface of the conveyor chain belt 2 when the temperature-measuring end of the temperature-measuring push tube 1001 extends into the heat preservation cover 8.

[0023] Refer to Figure 6 , on the top inner wall of the heat preservation cover 8, vertical chamber baffles 802 are fixed near both ends respectively. The rear sides of the heating devices 1101 in each chamber are inserted with air inlet pipes 11, and the bottom opening of the heat preservation cover 8 is fixed on the upper surface of the installation base 1 near the four edges. At both ends of the heat preservation cover 8 near the conveyor chain belt 2, gaps for feeding and discharging are reserved; above the gap at the entrance, an adjusting gate is fixed, which can adjust the laying thickness of the fasteners entering the internal heating, thereby preventing uneven heating caused by excessive stacking of the fasteners.

[0024] Refer to Figure 1 , near the middle of the front surface of the heat preservation cover 8, two observation windows 801 are reserved, and vacuum glass is arranged in the observation windows 801. The outer wall of the heat preservation cover 8 is provided with a heat-insulating layer 12; on the upper surface of the installation base 1, near the front and rear sides, groove-shaped slide rails 9 that open upward and form a sliding fit with the temperature-measuring push tube 1001 on the corresponding side are fixed; the actual operating state inside can be observed during use.

[0025] Refer to Figure 2 , Figures 4-6, support legs 3 are fixed to the lower surface of the installation base 1 near the front and rear edges on both sides; a horizontal X-shaped fixing frame 4 is fixed between the four support legs 3 in the middle, and a bearing seat one 20 is fixed in the middle of the X-shaped fixing frame 4. An anti-drop bearing is embedded in the middle of the bearing seat one 20, and a transmission shaft 19 is rotatably connected in the middle of the anti-drop bearing; a rotating plate 18 and a driven gear 16 are respectively fixed to the upper and lower ends of the transmission shaft 19; a vertical convex shaft 26 is fixed to the upper surface of the rotating plate 18 away from the transmission shaft 19; and the intermittent pushing mechanism 21 further includes a strip-shaped hole frame 2101 fixed to the lower surface of the sliding plate strip, and the extending direction of the strip-shaped hole frame 2101 is the same as the extending direction of the conveyor chain belt 2; and the convex shaft 26 is slidably connected in the strip-shaped hole frame 2101; horizontal and parallel guide slide bars 2102 are fixed to both ends of the sliding plate strip, and slide holes adapted to the guide slide bars 2102 are formed in the horizontal rods of the L-shaped hinge seats 701; compression springs 2103 are fixed between both ends of the sliding plate strip and the L-shaped hinge seats 701 on the corresponding sides; by providing the rotating plate 18 with the convex shaft 26 and cooperating with the setting of the strip-shaped hole frame 2101, when the temperature measuring mechanism 10 is driven to be inserted into the position closest to the middle of the heat preservation cover 8, it can be paused for a period of time, which is the best measurement time at this time, and the driven gear 16 used for driving only needs to keep rotating rapidly, which is convenient for control and not prone to failure.

[0026] Refer to Figures 1-2 , Figure 6 , a motor frame 13 is fixed to the side surface of one of the support legs 3 near the discharge section, and a reduction motor 6 is fixed to the upper surface of the motor frame 13 by bolts. The top end of the output shaft of the reduction motor 6 is fixed with a transmission rod 14 through a coupling; and a worm gear sleeve 15 is fixed to the end of the transmission rod 14 away from the reduction motor 6; a fixed hanging frame 23 is fixed to the lower surface of the installation base 1 near the worm gear sleeve 15, and a bearing seat two is fixed to the bottom end of the fixed hanging frame 23. A vertical short shaft rod 24 is arranged in the bearing seat two, and a large worm gear disk 17 that meshes with both the driven gear 16 and the worm gear sleeve 15 is fixed to the bottom end of the short shaft rod 24; by setting like this, the driving end is more labor-saving and safe.

[0027] Refer to Figure 4 and Figure 8 , Figure 11, air supply mechanisms 5 are arranged below both the front and rear ends of the X-shaped fixing frame 4. The air supply mechanism 5 includes an air barrel 501 fixed to the side of the support leg 3 with an opening facing the driven gear 16. A piston plate 503 is slidably connected inside each of the two air barrels 501. A connecting rod 504 is hinged to the opposite side of each of the two piston plates 503. The two connecting rods 504 are horizontally arranged and have different heights. The ends of the two connecting rods 504 close to the driven gear 16 are fixed to the same movable shaft, and the movable shaft is fixed to the lower surface of the driven gear 16 near the edge. One-way air outlet valves 502 are inserted at the bottom of each of the two air barrels 501. The air outlet ends of the two one-way air outlet valves 502 are inserted with air supply hoses 505, and the other ends of the air supply hoses 505 are inserted inside the temperature measuring push tube 1001 on the corresponding side. An obliquely downward strip-shaped air hole is opened in the middle of the plug 1003. By setting the air supply mechanism 5 that moves in step with the temperature measuring push tube 1001, air supply can be carried out when the temperature measuring mechanism 10 on the corresponding side is retracted as a whole. This can not only dissipate heat from the surface of the retracted thermocouple 1007, but also the excess air can compensate for the oxygen required for internal combustion.

[0028] Refer to Figure 7 , Figures 9-10 , a turning mechanism 7 is arranged at one end of the mounting base 1 close to the reduction motor 6. The turning mechanism 7 includes a mounting notch 103 opened on the side of the mounting base 1. An L-shaped hinge seat 701 with an L-shaped cross-section is fixed in the mounting notch 103 by bolts. A sliding bearing is rotatably connected in the L-shaped hinge seat 701. Two radially arranged folded spoke rods 702 are fixed to the circumferential outer wall of the sliding bearing. The ends of the two folded spoke rods 702 far from the sliding bearing are fixed to the same arc-shaped impact rod 703. A rectangular hole 102 is opened at the top of the mounting base 1 where the folded spoke rod 702 is located. A striking rod is hinged to the end of the rectangular hole 102 far from the folded spoke rod 702, and a limiting plate is arranged below the striking rod. A reset tension spring 705 is fixed to the lower surface of the horizontal plate of the L-shaped hinge seat 701, and the bottom end of the reset tension spring 705 is fixed to the upper surface of the folded spoke rod 702 near the top. An intermittent gear 704 meshing with the arc-shaped impact rod 703 is fixed on the transmission rod 14. By setting it like this, during use, when the fasteners reach the second half of the annealing furnace, part of the fasteners can be displaced along with the setting of the turning mechanism 7, preventing uneven heat dissipation in the later stage due to stacking.

[0029] A method for detecting the temperature inside an annealing furnace for bolt heat treatment includes the following steps: S1: Before use, first adjust the height between the bottom end of the adjusting gate at the entrance of the heat preservation cover 8 and the upper surface of the conveyor chain 2 to ensure that a single layer of bolts can pass through smoothly; S2: Start the power source of the intermittent pushing mechanism, i.e., the reduction motor 6; at this time, with a series of transmissions of the transmission rod 14 and the driven gear 16, the temperature measurement push tubes 1001 in the two temperature measurement mechanisms 10 are alternately pushed towards the middle of the upper surface of the conveyor chain belt 2; When one end of the temperature measurement push tube 1001 with the rotating rod 1006 and the thermocouple 1007 extends into the inside of the heat preservation cover 8, at this time, the end carrying the thermocouple 1007 quickly droops to the surface of the bolt; with the continuous advancement of the temperature measurement push tube 1001, when it is about to reach the middle of the conveyor chain belt 2, it will stop for a period of time; for stable temperature measurement; after the continuous rotation of the rotating plate 18, then retract the temperature measurement push tube 1001, and at this time, the other temperature measurement mechanism 10 repeats the steps of the previous temperature measurement mechanism; S3: When the temperature measurement mechanism 1001 retracts, it will drive the air supply mechanism 5 on the same side to start. At this time, air is continuously blown into the temperature measurement push tube 1001 through the air supply hose 505 to dissipate heat from the surface of the retracted thermocouple 1007, and the excess air can also compensate for the oxygen required for internal combustion.

[0030] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A temperature detection device in an annealing furnace for heat treatment of bolts, comprising a mounting base (1) having an overall long strip structure, a rectangular slide groove in the middle of the upper surface of the mounting base (1) being reserved in the same direction as the length, and a conveyor chain (2) being arranged in the rectangular slide groove, a heat preservation cover (8) being fixed above the mounting base (1); and a plurality of heating devices (1101) being arranged on the top inner wall of the heat preservation cover (8), characterized in that: An anti-slip groove (101) extending in the width direction of the mounting base (1) is formed in the middle of the lower surface of the mounting base (1), and an intermittent pushing mechanism (21) is arranged in the anti-slip groove (101); the intermittent pushing mechanism (21) comprises a sliding plate slidably connected to the anti-slip groove (101), and L-shaped baffles (25) are respectively arranged at both ends of the sliding plate, and mutually symmetrical temperature measuring mechanisms (10) are respectively fixed between the two L-shaped baffles (25) near the top ends, and the temperature measuring mechanism (10) comprises a temperature measuring mechanism (10) slidably plugged into the side of the heat preservation cover (8) and located as a whole on the conveyor chain belt ( 2) a temperature measuring push tube (1001) at the top; a strip-shaped through hole (1002) is formed on the lower surface of one end of the temperature measuring push tube (1001) close to the middle of the conveyor chain (2); a hinged frame (1005) is fixed to the inner wall of the bottom of the temperature measuring push tube (1001) at the end of the strip-shaped through hole (1002), and the hinged frame (1005) is located at one end close to the L-shaped baffle (25); a rotating rod (1006) capable of passing through the strip-shaped through hole (1002) is hinged in the hinged frame (1005); a groove is formed on the upper surface of the rotating rod (1006), and a thermocouple (1007) is clamped at the bottom end of the groove.

2. The temperature detection device in an annealing furnace for bolt heat treatment according to claim 1, characterized in that: A plug (1003) is fixed to the openings at the opposite ends of the two temperature measuring push tubes (1001), and a path-opening shovel plate (22) is fixed to the opposite sides of the two plugs (1003), the end of the path-opening shovel plate (22) away from the plug (1003) is attached to the upper surface of the conveyor chain (2), and a triangular cone (2201) is fixed to the side of the path-opening shovel plate (22) close to the plug (1003), and the triangular surface of the triangular cone (2201) is flush with the bottom surface of the path-opening shovel plate (22).

3. The temperature detection device in an annealing furnace for bolt heat treatment according to claim 1, characterized in that: A clamping spring (1004) is fixed to the middle of the upper surface of the rotating rod (1006), and the top end of the clamping spring (1004) is fixed to the top inner wall of the temperature measuring push tube (1001); the outer wall of the wire of the thermocouple (1007) is sleeved with a fireproof insulation tube.

4. The temperature detection device in an annealing furnace for bolt heat treatment according to claim 1, characterized in that: Vertical chamber baffles (802) are fixed to the top inner wall of the heat-insulating cover (8) near both ends, and an air inlet pipe (11) is plugged into the rear side of the heating device (1101) in each chamber. The bottom opening of the heat-insulating cover (8) is fixed to the upper surface of the mounting base (1) near four edges, and notches for feeding and discharging materials are reserved at the bottom of the heat-insulating cover (8) near both ends of the conveyor chain belt (2).

5. The temperature detection device in an annealing furnace for bolt heat treatment according to claim 1, characterized in that: Two observation windows (801) are reserved near the middle of the front side of the heat-insulating cover (8), and vacuum glass is arranged in the observation windows (801). The outer wall of the heat-insulating cover (8) is provided with a heat-insulating layer (12). The upper surface of the mounting base (1) is fixed with grooved slide rails (9) opening upward and forming a sliding fit with the temperature measuring push tube (1001) on the side thereof, near the front and rear sides.

6. The temperature detection device in an annealing furnace for heat treatment of bolts according to claim 1, characterized in that: Support legs (3) are fixed to the lower surface of the mounting base (1) near the front and rear side edges; an X-shaped fixing frame (4) at the same level is fixed between the four supporting legs (3) in the middle, and a bearing seat (20) is fixed in the middle of the X-shaped fixing frame (4), an anti-slip bearing is embedded in the middle of the bearing seat (20), and a transmission shaft (19) is rotatably connected in the middle of the anti-slip bearing; a rotating plate (18) and a driven gear (16) are respectively fixed to the upper and lower ends of the transmission shaft (19); a vertical convex shaft (26) is fixed to the upper surface of the rotating plate (18) away from the transmission shaft (19) ; and the intermittent pushing mechanism (21) further comprises a strip hole frame (2101) fixed on the lower surface of the sliding slat, the extension direction of the strip hole frame (2101) is consistent with the extension direction of the conveyor chain (2); and the convex shaft (26) is slidably connected in the strip hole frame (2101); both ends of the sliding slat are fixed with horizontal and mutually parallel guide slide bars (2102), and the horizontal bar of the L-shaped hinge seat (701) is provided with a slide hole matched with the guide slide bar (2102); and compression springs (2103) are fixed between both ends of the sliding slat and the L-shaped hinge seat (701) on the side where they are located.

7. The temperature detection device in an annealing furnace for heat treatment of bolts according to claim 6, characterized in that: A motor frame (13) is fixed to the side of one of the support legs (3) near the discharge section, and a reduction motor (6) is fixed to the upper surface of the motor frame (13) by bolts, and a transmission rod (14) is fixed to the top end of the output shaft of the reduction motor (6) by a coupling; and a worm sleeve (15) is fixed to the end of the transmission rod (14) away from the reduction motor (6); a fixed hanger (23) is fixed to the lower surface of the mounting base (1) near the worm sleeve (15), and a bearing seat 2 is fixed to the bottom end of the fixed hanger (23), a vertical short shaft rod (24) is arranged in the bearing seat 2, and a large worm wheel (17) meshing with the driven gear (16) and the worm sleeve (15) is fixed to the bottom end of the short shaft rod (24).

8. The temperature detection device in an annealing furnace for heat treatment of bolts according to claim 7, characterized in that: An air supply mechanism (5) is provided below both front and rear ends of the X-shaped fixing frame (4), and the air supply mechanism (5) comprises an air barrel (501) fixed to the side of the supporting leg (3) and having an opening facing the driven gear (16), a piston plate (503) being slidably connected in the barrels of the two air barrels (501), and connecting rods (504) are hingedly connected on opposite sides of the two piston plates (503), and the two connecting rods (504) are arranged horizontally and at different heights, and the two connecting rods (504) are close to the driven gear (16). The movable shaft is fixed to one end of the movable gear (16), and the movable shaft is fixed to the lower surface of the driven gear (16) near the edge; one-way air outlet valves (502) are plugged into the bottom of the two wind barrels (501); air outlet ends of the two one-way air outlet valves (502) are plugged into air supply hoses (505), and the other ends of the air supply hoses (505) are plugged into the inside of the temperature measuring push tube (1001) on the same side; and strip air holes obliquely facing downward are opened in the middle of the plugs (1003).

9. The temperature detection device in an annealing furnace for heat treatment of bolts according to claim 8, characterized in that: The mounting base (1) is provided with a material turning mechanism (7) at one end close to the reduction motor (6), and the material turning mechanism (7) includes a mounting notch (103) provided on a side of the mounting base (1), and an L-shaped hinge seat (701) having an L-shaped longitudinal section is fixed in the mounting notch (103) by bolts, a sliding bearing is rotatably connected in the L-shaped hinge seat (701), and two radially structured folded spoke rods (702) are fixed to the circumferential outer wall of the sliding bearing, and the same arc-shaped impact rod (702) is fixed to one end away from the sliding bearing. 03); the mounting base (1) is provided with a rectangular hole (102) at the top end of the folded spoke rod (702); and a striking rod is hingedly connected to one end of the top end of the rectangular hole (102) away from the folded spoke rod (702), and a limit plate is arranged below the striking rod; a reset spring (705) is fixed to the lower surface of the horizontal plate of the L-shaped hinge seat (701), and the bottom end of the reset spring (705) is fixed to the upper surface of the folded spoke rod (702) near the top end; an intermittent gear (704) meshing with the arc-shaped impact rod (703) is fixed on the transmission rod (14).

10. A method for detecting the temperature in an annealing furnace for heat treatment of bolts, comprising the device for detecting the temperature in an annealing furnace for heat treatment of bolts as claimed in claim 9, characterized in that: The following steps are involved: S1: Before use, adjust the height between the bottom end of the gate at the entrance of the heat preservation cover (8) and the upper surface of the conveyor chain (2) to ensure that the single-layer bolts can pass smoothly; S2: starting the power source of the intermittent pushing mechanism, i.e. the reduction motor (6); at this time, with a series of transmissions of the transmission rod (14) and the driven gear (16), the temperature measuring push tubes (1001) in the two temperature measuring mechanisms (10) are alternately pushed toward the middle of the upper surface of the conveyor chain belt (2); When one end of one of the temperature measuring push tubes (1001) with the rotating rod (1006) and the thermocouple (1007) extends into the interior of the heat preservation cover (8), at this time, the end carrying the thermocouple (1007) quickly droops to the surface of the bolt; as the temperature measuring push tube (1001) continues to advance, when it is about to reach the middle of the conveyor chain (2), it will stop for a period of time to perform stable temperature measurement; after the rotating plate (18) continues to rotate, the temperature measuring push tube (1001) is retracted, and at this time, the temperature measuring mechanism (10) on the other side repeats the steps of the previous temperature measuring mechanism; S3: When the temperature measuring mechanism (1001) is retracted, the air supply mechanism (5) on the same side is activated. At this time, air is continuously blown into the temperature measuring push tube (1001) through the air supply hose (505) to dissipate heat from the surface of the retracted thermocouple (1007). In addition, the excess air can also compensate for the oxygen required for internal combustion.

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