Temperature detection device and method in annealing furnace for bolt heat treatment

Abstract

The present invention belongs to the field of heat treatment technology, and in particular to a temperature detection device and method in an annealing furnace for heat treatment of bolts. In view of the problem that temperature measurement at a certain fixed point for a long time is prone to failure of the temperature measuring device, which may lead to deviation between the measured temperature and the actual temperature, the following scheme is proposed, including a mounting base with an overall long strip structure, a rectangular chute in line with the length direction is reserved in the middle of the upper surface of the mounting base, and a conveyor chain is provided in the rectangular chute, and a heat preservation cover is fixed above the mounting base; and a plurality of heating devices are provided on the top inner wall of the heat preservation cover, and an anti-slip chute extending along the width direction of the mounting base is provided in the middle of the lower surface of the mounting base. The present invention can alternately perform ultra-close-range temperature measurement on the surface of the conveyor chain during the annealing process. If the temperature difference between the two measurements is not large, the average value can be taken, thereby avoiding a large difference between the measured temperature and the actual temperature due to damage to one of the two.

Description

Technical Field

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

[0002] Annealing furnace temperature monitoring is a crucial component of industrial process control, particularly in metal processing and heat treatment. Annealing furnaces are used to heat metal materials (such as steel, copper, and aluminum), maintain them at a specific temperature for a period of time, and then slowly cool them to improve the metal's internal structure, physical properties, and mechanical performance. Accurate temperature control significantly impacts the quality and performance of the metal. Temperature uniformity in annealing furnaces is crucial, as uneven temperatures can lead to inconsistent annealing results, impacting product quality. Temperature sensors can be placed at multiple points within the furnace to monitor and adjust temperature changes.

[0003] After searching, it is found that 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 embeds many 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, thereby facilitating the control of the air intake volume, that is, the temperature level; however, this type of temperature measuring device consumes a lot of temperature measuring devices, and once a temperature measuring device ages or measures the temperature inaccurately, it is difficult to detect, which leads to deviations in the measured temperature. In order to solve the problem that the temperature measurement at a fixed point for a long time is prone to deviations between the measured temperature and the actual temperature due to failure of the temperature measuring device, a new type of measuring device and method are provided. Summary of the Invention

[0004] To solve the technical problem that long-term temperature measurement at a fixed point is prone to deviation between the measured temperature and the actual temperature due to failure of the temperature measuring device, the present invention adopts the following technical solution:

[0005] A temperature detection device in an annealing furnace for heat treatment of bolts, comprising a mounting base with an overall elongated structure, a rectangular slide groove consistent with the length direction is reserved in the middle of the upper surface of the mounting base, and a conveyor chain is provided in the rectangular slide groove, a heat preservation cover is fixed above the mounting base; and a plurality of heating devices are provided on the top inner wall of the heat preservation cover, an anti-slip slide groove extending along the width direction of the mounting base is opened in the middle of the lower surface of the mounting base, and an intermittent pushing mechanism is provided in the anti-slip slide groove; the intermittent pushing mechanism includes a sliding strip slidably connected to the anti-slip slide groove, and both ends of the sliding strip are respectively provided with mutual Symmetrical L-shaped baffles, two L-shaped baffles are respectively fixed with mutually symmetrical and co-linear temperature measuring mechanisms near the top, the temperature measuring mechanism includes a temperature measuring push tube that is slidably plugged into the side of the heat preservation cover and is located above the conveyor chain as a whole; the lower surface of the temperature measuring push tube near the middle of the conveyor chain is provided with a strip-shaped through-hole, and the bottom inner wall of the temperature measuring push tube is located at the end of the strip-shaped through-hole and a hinged frame is fixed, and the hinged frame is located at one end near the L-shaped baffle, and a rotating rod that can pass through the strip-shaped through-hole is hinged in the hinged frame, and a groove is provided on the upper surface of the rotating rod, and a thermocouple is clamped at the bottom end of the groove.

[0006] A further arrangement is that plugs are fixed at the openings at the opposite ends of the two temperature measuring push tubes, and an opening shovel plate is fixed on the opposite side of the two plugs. The end of the opening shovel plate away from the plug is attached to the upper surface of the conveyor chain belt, and a triangular pyramid is fixed on the side of the opening shovel plate close to the plug. The triangular surface of the triangular pyramid is flush with the bottom surface of the opening shovel plate, which can prevent the fastener from being pulled back to the edge during the retraction process.

[0007] A further arrangement is that a clamping spring is fixed to the middle of the upper surface of the rotating rod, and the top end of the clamping spring is fixed to the top inner wall of the temperature measuring push tube; the outer wall of the thermocouple wire is sleeved with a fireproof insulation tube, so that when the temperature measuring end of the temperature measuring push tube is extended into the interior of the insulation cover, the end of the rotating rod with the thermocouple can be quickly pushed out to the surface of the conveyor chain.

[0008] A further arrangement is that vertical chamber baffles are fixed near both ends of the top inner wall of the thermal insulation cover, an air inlet pipe is inserted into the rear side of the heating device in each chamber, and the bottom opening of the thermal insulation cover is fixed on the upper surface of the mounting base near the four edges, and the bottom end of the thermal insulation cover near both ends of the conveyor chain is reserved with notches for feeding and discharging materials; an adjusting gate is fixed above the notch of the entrance, which can adjust the laying thickness of the fasteners entering the interior for heating, thereby preventing the fasteners from being stacked too thickly and causing uneven heating.

[0009] A further arrangement is that two observation windows are reserved near the middle of the front of the thermal insulation cover, and vacuum glass is provided in the observation windows, and the outer wall of the thermal insulation cover is provided with a heat insulation layer; the upper surface of the mounting base is fixed with grooved slide rails near the front and rear sides, which open upward and form a sliding fit with the temperature measuring push tube on the side; the actual operating status of the interior can be observed during use.

[0010] The further arrangement is that support legs are fixed on the lower surface of the mounting base near the front and rear side edges; the same horizontal X-shaped fixing frame is fixed between the four supporting legs in the middle, and a bearing seat 1 is fixed in the middle of the X-shaped fixing frame, an anti-slip bearing is embedded in the middle of the bearing seat 1, and the middle of the anti-slip bearing is rotatably connected to a transmission shaft; the upper and lower ends of the transmission shaft are respectively fixed with a rotating plate and a driven gear; a vertical convex shaft is fixed on the upper surface of the rotating plate away from the transmission shaft; and the intermittent pushing mechanism also includes a strip hole frame fixed to the lower surface of the sliding plate, the extension direction of the strip hole frame is consistent with the extension direction of the conveyor chain; and the convex shaft is slidably connected to the strip hole frame; both ends of the sliding plate are fixed with horizontal and mutually parallel guide slide rods, and the horizontal rod of the L-shaped hinge seat is provided with a sliding hole adapted for the guide slide rod; compression springs are fixed between the two ends of the sliding plate and the L-shaped hinge seat on their side.

[0011] A further arrangement is that a motor frame is fixed to the side of one of the supporting legs near the discharging section, and a reduction motor is fixed to the upper surface of the motor frame by bolts, and a transmission rod is fixed to the top end of the output shaft of the reduction motor through a coupling; and a worm sleeve is fixed to the end of the transmission rod away from the reduction motor; a fixed hanger is fixed to the lower surface of the mounting base near the worm sleeve, and a bearing seat 2 is fixed to the bottom end of the fixed hanger, and a vertical short shaft rod is provided in the bearing seat 2, and a large worm wheel disc that meshes with the driven gear and the worm sleeve is fixed to the bottom end of the short shaft rod; making the driving end more labor-saving and safer.

[0012] A further arrangement is that an air supply mechanism is provided below the front and rear ends of the X-shaped fixing frame, and the air supply mechanism includes an air barrel fixed to the side of the supporting leg with an opening facing the driven gear, and a piston plate is slidably connected to the barrel of the two air barrels, and the two piston plates are hinged on the opposite sides with a connecting rod, the two connecting rods are horizontally arranged and at different heights, and the same movable shaft is fixed on the end of the two connecting rods close to the driven gear, and the movable shaft is fixed on the lower surface of the driven gear near the edge; a one-way air outlet valve is plugged into the bottom of the barrel of the two air barrels; and the air outlet ends of the two one-way air outlet valves are plugged into an air supply hose, and the other end of the air supply hose is plugged into the inside of the temperature measuring push tube on that side; and a strip-shaped air hole obliquely downward is opened in the middle of the plug; air can be supplied when the temperature measuring mechanism on that side is retracted as a whole, which can not only dissipate heat to the surface of the retracted thermocouple, but also the excess air can compensate for the oxygen required for internal combustion.

[0013] A further arrangement is that a turning mechanism is provided at one end of the mounting base close to the reduction motor, and the turning mechanism includes a mounting notch provided on the side of the mounting base, and an L-shaped hinge seat with an L-shaped longitudinal section is fixed in the mounting notch by bolts, a sliding bearing is rotatably connected in the L-shaped hinge seat, and two folded spoke rods with a radial structure are fixed to the circumferential outer wall of the sliding bearing, and the same arc-shaped impact rod is fixed to the end of the two folded spoke rods away from the sliding bearing; a rectangular hole is provided at the top of the folded spoke rod of the mounting base Hole; and the top of the rectangular hole is hinged with a striking rod at one end away from the folded spoke rod, and a limiting plate is arranged below the striking rod; a reset spring is fixed to the lower surface of the horizontal plate of the L-shaped hinge seat, and the bottom end of the reset spring is fixed to the upper surface of the folded spoke rod near the top; an intermittent gear is fixed on the transmission rod and meshes with the arc-shaped impact rod; when in use, when the fastener reaches the second half of the annealing furnace, a part of the fasteners can be shifted as the turning mechanism is set to prevent uneven heat dissipation in the later stage due to superposition.

[0014] A method for detecting the temperature in an annealing furnace for heat treatment of bolts, comprising the temperature detection device in an annealing furnace for heat treatment of bolts as described above, comprising the following steps:

[0015] S1: Before use, adjust the height between the bottom of the gate at the entrance of the insulation cover and the upper surface of the conveyor chain to ensure that the single-layer bolts can pass through smoothly;

[0016] S2: Start the power source of the intermittent pushing mechanism, i.e., the reduction motor; at this time, with the series of transmission of the transmission rod and the driven gear, the temperature measuring push tubes in the two temperature measuring mechanisms are alternately pushed toward the middle of the upper surface of the conveyor chain;

[0017] 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, the end carrying the thermocouple quickly droops to the surface of the bolt; as the temperature measuring push tube continues to advance, when it is about to reach the middle of the conveyor chain, it will stop for a while to perform stable temperature measurement; after the rotating plate continues to rotate, the temperature measuring push tube is retracted, and the temperature measuring mechanism on the other side repeats the steps of the previous temperature measuring mechanism;

[0018] 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 temperature measuring push tube through the air supply hose to dissipate heat from the surface of the retracted thermocouple. In addition, the excess air can also compensate for the oxygen required for internal combustion.

[0019] The beneficial effects of the present invention are:

[0020] 1. By setting up two sets of temperature measuring mechanisms and cooperating with the thermocouple fixed at the drooping end of the rotating rod, the surface of the conveyor chain can be alternately measured at ultra-close distances during the annealing process. If the temperature difference between the two measurements is not large, the average value can be taken, thereby avoiding a large difference between the measured temperature and the actual temperature due to damage to one of the thermocouples. And when one of the thermocouples is measuring, the other can be retracted into the temperature measuring push tube to prevent the temperature measuring mechanism from being in a high temperature state all the time, thereby increasing the service life of the thermocouple.

[0021] 2. By setting up an open-circuit shovel plate and cooperating with the temperature measuring push tube that moves back and forth, the annealed fasteners can be slowly turned over while measuring the temperature, so that the fasteners can be heated evenly to prevent uneven heating due to superposition. In addition, the bottom end of the freely hanging rotating rod carrying the thermocouple can contact the surface of the conveyor chain, and the temperature of the fasteners on the surface of the conveyor chain can be directly measured.

[0022] 3. By setting a rotating plate with a convex shaft and compression springs at both ends of the sliding strip, and coordinating with the setting of the strip hole frame, the temperature measuring mechanism can be driven to pause for a period of time when it is inserted into the middle position of the thermal insulation cover. This is the best measurement time, and the driven gear used for driving only needs to keep rotating rapidly, which is easy to control and not prone to failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a temperature detection device in an annealing furnace for heat treatment of bolts proposed by the present invention;

[0024] Figure 2 This is a bottom-up perspective structural diagram of a temperature detection device in an annealing furnace for heat treatment of bolts proposed by the present invention;

[0025] Figure 3 This is a front view of a temperature detection device in an annealing furnace for heat treatment of bolts proposed by the present invention;

[0026] Figure 4 The present invention proposes a temperature detection device for annealing furnace for bolt heat treatment Figure 3 Schematic diagram of the cross-sectional structure along line AA;

[0027] Figure 5 This is a side view of a temperature detection device in an annealing furnace for heat treatment of bolts proposed by the present invention;

[0028] Figure 6 The present invention proposes a temperature detection device for annealing furnace for bolt heat treatment Figure 5 Schematic diagram of the cross-sectional structure along line BB;

[0029] Figure 7This is a schematic cross-sectional view of the turning mechanism of a temperature detection device in an annealing furnace for heat treatment of bolts proposed by the present invention;

[0030] Figure 8 This is a schematic structural diagram of a temperature detection device in an annealing furnace for heat treatment of bolts proposed by the present invention with the heat insulation cover removed;

[0031] Figure 9 This is a schematic diagram of the exploded structure of a bearing seat and an air supply mechanism in a temperature detection device in an annealing furnace for heat treatment of bolts proposed by the present invention;

[0032] Figure 10 This is a schematic diagram of the assembly structure of an intermittent pushing mechanism of a temperature detection device in an annealing furnace for heat treatment of bolts proposed by the present invention;

[0033] Figure 11 The present invention provides a schematic diagram of the partial cross-sectional structure of a temperature measuring push tube in a temperature detection device in an annealing furnace for heat treatment of bolts.

[0034] In the figure: 1. Mounting base; 101. Anti-slip slide; 102. Rectangular hole; 103. Mounting notch; 2. Conveyor chain; 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. Speed ​​reducer; 7. Turning mechanism; 701. L-shaped hinge seat; 702. Folding spoke rod; 703. Arc-shaped impact rod; 704. Intermittent gear; 705. Reset spring; 8. Insulation cover; 801. Observation window; 802. Chamber baffle; 9. Grooved slide rail; 10. Temperature measuring mechanism; 1001. Temperature measuring push tube; 1002 , strip perforation; 1003, plug; 1004, tightening spring; 1005, articulated frame; 1006, rotating rod; 1007, thermocouple; 11, air intake pipe; 1101, heating device; 12, thermal insulation layer; 13, motor frame; 14, transmission rod; 15, worm gear sleeve; 16, driven gear; 17, large worm gear; 18, rotating plate; 19, transmission shaft; 20, bearing seat 1; 21, intermittent pushing mechanism; 2101, strip hole frame; 2102, guide slide; 2103, compression spring; 22, open shovel plate; 2201, triangular cone; 23, fixed hanger; 24, short shaft; 25, L-shaped baffle; 26, convex shaft. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] In this embodiment, refer to Figure 1-11A temperature detection device in an annealing furnace for heat treatment of bolts, comprising a mounting base 1 of an overall long strip structure, a rectangular chute in the same length direction is reserved in the middle of the upper surface of the mounting base 1, and a conveyor chain 2 is provided in the rectangular chute and slides along the bottom of the rectangular chute, and a heat preservation cover 8 is fixed above the mounting base 1 to cover the conveyor chain 2; and a plurality of heating devices 1101 are provided on the top inner wall of the heat preservation cover 8, and an anti-slipping cover extending along the width direction of the mounting base 1 is provided in the middle of the lower surface of the mounting base 1. The intermittent pushing mechanism 21 is provided in the anti-slip chute 101; the intermittent pushing mechanism 21 includes a sliding strip slidably connected to the anti-slip chute 101, and L-shaped baffles 25 are respectively provided at both ends of the sliding strip, and a temperature measuring mechanism 10 is fixed between the two L-shaped baffles 25 near the top, which is symmetrical to each other and on the same straight line. The temperature measuring mechanism 10 includes a temperature measuring push tube 1001 that is slidably plugged into the side of the heat preservation cover 8 and is located above the conveyor chain 2 as a whole; the temperature measuring push tube 1001 is close to the top of the heat preservation cover 8. The lower surface of one end in the middle of the conveyor chain 2 is provided with a strip-shaped through-hole 1002, and the bottom inner wall of the temperature measuring push tube 1001 is located at the end of the strip-shaped through-hole 1002 and is fixed with a hinged frame 1005, and the hinged frame 1005 is located at one end close to the L-shaped baffle 25, and a rotating rod 1006 that can pass through the strip-shaped through-hole 1002 is hinged in the hinged frame 1005, and a groove is provided on the upper surface of the rotating rod 1006, and a thermocouple 1007 is clamped at the bottom end of the groove; specifically, by setting two sets of temperature measuring mechanisms 10, The thermocouple 1007 fixed at the drooping end of the rotating rod 1006 can alternately perform ultra-close-range temperature measurement on the surface of the conveyor chain 2 during the annealing process. If the temperature difference between the two measurements is not large, the average value can be taken, thereby avoiding a large difference between the measured temperature and the actual temperature due to damage to one of them; and when one of them is measuring, the other can be retracted into the temperature measuring push tube 1001, preventing the temperature measuring mechanism 10 from being in a high temperature state all the time, thereby improving the service life of the thermocouple 1007.

[0037] Reference Figure 11, the openings of the opposite ends of the two temperature measuring push tubes 1001 are fixed with plugs 1003, and the opposite sides of the two plugs 1003 are fixed with open-circuit shovel plates 22, the ends of the open-circuit shovel plates 22 away from the plugs 1003 are attached to the upper surface of the conveyor chain 2, and the side of the open-circuit shovel plates 22 close to the plug 1003 is fixed with a triangular pyramid 2201, 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 conjunction with the temperature measuring push tube 1001 moving back and forth, the annealed fasteners can be slowly turned over while measuring the temperature, so that the fasteners can be heated evenly, preventing uneven heating due to superposition, and the bottom end of the rotating rod 1006 with the thermocouple 1007 freely hanging can contact the surface of the conveyor chain 2, and then the temperature of the fasteners on the surface of the conveyor chain 2 can be directly measured.

[0038] Reference Figure 11 A tightening spring 1004 is fixed to the middle of the upper surface of the rotating rod 1006, and the top of the tightening 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, so that when the temperature measuring end of the temperature measuring push tube 1001 is extended into the interior of the thermal insulation cover 8, the end of the rotating rod 1006 with the thermocouple 1007 can be quickly pushed out to the surface of the conveyor chain 2.

[0039] Reference Figure 6 , vertical chamber baffles 802 are fixed near both ends of the top inner wall of the insulation cover 8, and an air inlet pipe 11 is inserted into the rear side of the heating device 1101 in each chamber, and the bottom opening of the insulation cover 8 is fixed on the upper surface of the mounting base 1 near the four edges, and the bottom end of the insulation cover 8 near both ends of the conveyor chain 2 are reserved for feeding and discharging materials; an adjusting gate is fixed above the notch of the entrance, which can adjust the laying thickness of the fasteners entering the interior for heating, thereby preventing the fasteners from being stacked too thickly and causing uneven heating.

[0040] Reference Figure 1 Two observation windows 801 are reserved near the middle of the front of the thermal insulation cover 8, and vacuum glass is provided in the observation window 801, and the outer wall of the thermal insulation cover 8 is provided with a heat insulation layer 12; the upper surface of the mounting base 1 is fixed with a groove-type slide rail 9 with an opening facing upward and forming a sliding fit with the temperature measuring push tube 1001 on the side near the front and rear sides; the actual operating status of the interior can be observed during use.

[0041] Reference Figure 2 、 Figure 4-Figure 6, support legs 3 are fixed to the lower surface of the mounting base 1 near the front and rear edges; an X-shaped fixing frame 4 of 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, and an anti-slip bearing is embedded in the middle of the bearing seat 20, and the middle of the anti-slip bearing is rotatably connected to a transmission shaft 19; a rotating plate 18 and a driven gear 16 are fixed to the upper and lower ends of the transmission shaft 19 respectively; 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 also includes a strip hole frame 2101 fixed to the lower surface of the sliding strip, and the extension direction of the strip hole frame 2101 is the same as 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 strip 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 sliding hole adapted to the guide slide bar 2102; compression springs 2103 are fixed between both ends of the sliding strip and the L-shaped hinge seat 701 on their side; by providing a rotating plate 18 with a convex shaft 26 and cooperating with the setting of the strip hole frame 2101, the temperature measuring mechanism 10 can be driven to pause for a period of time when it is inserted into the heat preservation cover 8 near the middle position, and this time is the best measurement time, and the driven gear 16 used for driving only needs to keep rotating rapidly, which is easy to control and not prone to failure.

[0042] Reference Figure 1-Figure 2 、 Figure 6 A motor frame 13 is fixed to the side of one of the supporting legs 3 near the discharging section, and a reduction motor 6 is fixed to the upper surface of the motor frame 13 by bolts, and the top end of the output shaft of the reduction motor 6 is fixed to a transmission rod 14 through 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, and a vertical short shaft rod 24 is provided in the bearing seat 2, and a large worm wheel disc 17 that meshes with the driven gear 16 and the worm sleeve 15 is fixed to the bottom end of the short shaft rod 24; through such an arrangement, the driving end is more labor-saving and safer.

[0043] Reference Figure 4 and Figure 8 、 Figure 11, an air supply mechanism 5 is provided below the front and rear ends of the X-shaped fixing frame 4, and the air supply mechanism 5 includes an air barrel 501 fixed to the side of the supporting leg 3 with an opening facing the driven gear 16, and a piston plate 503 is slidably connected to the barrel of the two air barrels 501, and a connecting rod 504 is hinged on the opposite side of the two piston plates 503. The two connecting rods 504 are horizontally arranged and have different heights. The same movable shaft is fixed to one end of the two connecting rods 504 close to the driven gear 16, and the movable shaft is fixed to the lower surface of the driven gear 16 near the edge; the bottom of the two air barrels 501 are A one-way air outlet valve 502 is plugged in; and the air outlet ends of the two one-way air outlet valves 502 are plugged in with an air supply hose 505, and the other end of the air supply hose 505 is plugged in the inside of the temperature measuring push tube 1001 on the side; and the middle of the plug 1003 is provided with a strip air hole slanting downward; by setting an air supply mechanism 5 that moves in step with the temperature measuring push tube 1001, air can be supplied when the temperature measuring mechanism 10 on the side is withdrawn as a whole, which can not only dissipate heat to the surface of the retracted thermocouple 1007, but also the excess air can compensate for the oxygen required for internal combustion.

[0044] Reference Figure 7 、 Figure 9-10 , a turning mechanism 7 is provided at one end of the mounting base 1 close to the reduction motor 6, and the turning mechanism 7 includes a mounting notch 103 opened on the side of the mounting base 1, and an L-shaped hinge seat 701 with 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 on the circumferential outer wall of the sliding bearing, and the same arc-shaped impact rod 703 is fixed on the end of the two folded spoke rods 702 away from the sliding bearing; a rectangular hole 102 is opened at the top of the folded spoke rod 702 of the mounting base 1; and the rectangular hole The top of 102 is hinged with a striking rod at one end away from the folded spoke rod 702, and a limiting plate is provided 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; an intermittent gear 704 is fixed on the transmission rod 14, which is meshed with the arc-shaped impact rod 703; through such an arrangement, when in use, when the fasteners reach the second half of the annealing furnace, part of the fasteners can be shifted according to the setting of the turning mechanism 7 to prevent uneven heat dissipation in the later stage due to superposition.

[0045] A method for detecting temperature in an annealing furnace for heat treatment of bolts, comprising the following steps:

[0046] 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;

[0047] S2: The power source of the intermittent pushing mechanism, i.e., the reduction motor 6, is started; at this time, with the series of transmission 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 2;

[0048] When one end of the temperature measuring push tube 1001 with the rotating rod 1006 and the thermocouple 1007 extends into the interior of the heat-insulating 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 while to perform stable temperature measurement; wait for the rotating plate 18 to continue to rotate, then retract the temperature measuring push tube 1001, and at this time the temperature measuring mechanism 10 on the other side repeats the steps of the previous temperature measuring mechanism;

[0049] S3: When the temperature measuring push tube 1001 is retracted, the air supply mechanism 5 on the same side will be started. 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.

[0050] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A temperature detection device in an annealing furnace for heat treatment of bolts, comprising a mounting base (1) with an overall long strip structure, a rectangular chute in the same length direction is reserved in the middle of the upper surface of the mounting base (1), and a conveyor chain (2) is arranged in the rectangular chute, a heat preservation cover (8) is fixed above the mounting base (1); and a plurality of heating devices (1101) are arranged on the top inner wall of the heat preservation cover (8), characterized in that: An anti-slip groove (101) extending along the width direction of the mounting base (1) is provided in the middle of the lower surface of the mounting base (1), and an intermittent pushing mechanism (21) is provided in the anti-slip groove (101); the intermittent pushing mechanism (21) comprises a sliding strip slidably connected to the anti-slip groove (101), and L-shaped baffles (25) symmetrical to each other are provided at both ends of the sliding strip, and a temperature measuring mechanism (10) symmetrical to each other is fixed between the two L-shaped baffles (25) near the top, and the temperature measuring mechanism (10) comprises a sliding plug-in on the side of the heat-insulating cover (8) and located on the conveyor chain ( 2) a temperature measuring push tube (1001) at the top; a strip-shaped through hole (1002) is provided 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 provided 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 an opening shovel plate (22) is fixed to the opposite sides of the two plugs (1003), and the end of the 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 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 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 pressing spring (1004) is fixed to the middle of the upper surface of the rotating rod (1006), and the top end of the pressing 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 (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 of the heat-insulating cover (8), and vacuum glass is provided 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 groove-shaped slide rails (9) with an upward opening near the front and rear sides, and forming a sliding fit with the temperature measuring push tube (1001) on the side.

6. The temperature detection device in an annealing furnace for bolt heat treatment 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 edges; an X-shaped fixing frame (4) of 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 to the middle of the anti-slip bearing; a rotating plate (18) and a driven gear (16) are fixed to the upper and lower ends of the transmission shaft (19), respectively; 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) also includes a strip hole frame (2101) fixed to the lower surface of the sliding strip, and 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); horizontal and mutually parallel guide slide bars (2102) are fixed at both ends of the sliding strip, and a sliding hole adapted to the guide slide bar (2102) is opened on the horizontal bar of the L-shaped hinge seat (701); compression springs (2103) are fixed between both ends of the sliding strip and the L-shaped hinge seat (701) on the side.

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) through 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), and a vertical short shaft (24) is provided in the bearing seat 2, and a large worm wheel (17) that meshes with the driven gear (16) and the worm sleeve (15) is fixed to the bottom end of the short shaft (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) with an opening facing the driven gear (16), a piston plate (503) is slidably connected in the barrels of the two air barrels (501), and a connecting rod (504) is hinged on the opposite side 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). One end of the movable gear (16) is fixed with the same movable shaft, and the movable shaft is fixed to the lower surface of the driven gear (16) near the edge; the bottom of the two wind barrels (501) are both plugged with a one-way air outlet valve (502); and the air outlet ends of the two one-way air outlet valves (502) are both plugged with an air supply hose (505), and the other end of the air supply hose (505) is plugged into the inside of the temperature measuring push tube (1001) on the side; and the middle of the plug (1003) is provided with a strip air hole obliquely facing downward.

9. The temperature detection device in an annealing furnace for bolt heat treatment according to claim 8, characterized in that: The mounting base (1) is provided with a turning mechanism (7) at one end close to the reduction motor (6), and the turning mechanism (7) includes a mounting notch (103) provided on the 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 (701) is fixed to the end of the two folded spoke rods (702) 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 provided 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) is fixed on the transmission rod (14) and is meshed with the arc-shaped impact rod (703).

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 according to 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: Start the power source of the intermittent pushing mechanism, i.e., the reduction motor (6); at this time, with the series of transmission 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 (2); When one end of the temperature measuring push tube (1001) with the rotating rod (1006) and the thermocouple (1007) extends into the interior of the heat-insulating cover (8), the end carrying the thermocouple (1007) quickly droops to the surface of the bolt; as the temperature measuring push tube (1001) continues to advance, it will stop for a period of time when it is about to reach the middle of the conveyor chain (2); stable temperature measurement is performed; after the rotating plate (18) continues to rotate, the temperature measuring push tube (1001) is retracted, and the temperature measuring mechanism (10) on the other side repeats the steps of the previous temperature measuring mechanism; S3: When the temperature measuring push tube (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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