Automatic sorting device and method for straight-strip-shaped thermal bimetal elements

Abstract

The invention relates to the technical field of thermal bimetal elements, and discloses an automatic sorting device and method for straight bar type thermal bimetal elements, and the sorting device comprises a vibration feeding mechanism, a magnetic orientation screening mechanism and a detection sorting mechanism; the vibration feeding mechanism is connected with the feeding end of the magnetic orientation screening mechanism through a conveying guide pipe, the detecting and sorting mechanism is arranged at the tail end of the magnetic orientation screening mechanism, and the magnetic orientation screening mechanism is used for screening out thermal bimetal elements with low-expansion layers consistent in orientation and conveying the thermal bimetal elements to the detecting and sorting mechanism. The detecting and sorting mechanism comprises a heating unit and a sorting execution unit, after the thermal bimetallic element is heated by the heating unit, the sorting execution unit sorts the thermal bimetallic element according to the heating deformation quantity of the thermal bimetallic element, and the thermal bimetallic element enters the first guide pipe or the second guide pipe after being sorted by the sorting execution unit. According to the sorting device, automatic sorting of the thermal bimetal elements is achieved, and the problems that in the prior art, sorting difficulty is large, and sorting accuracy is low are solved.

Description

Technical Field

[0001] This application relates to the technical field of thermal bimetallic elements, and in particular to an automatic sorting device and method for straight-bar type thermal bimetallic elements. Background Technology

[0002] With social development, the applications of bimetallic thermocouples are becoming increasingly widespread. In the design and production of bimetallic thermocouple stamping dies and their supporting accessories, in order to balance the versatility of the die accessories and the ability of end products to meet different specific customer needs, and to save product development costs, bimetallic thermocouples include a low-expansion layer and a high-expansion layer. The low-expansion layer is magnetic while the high-expansion layer is not. In the same series of products, there are often bimetallic thermocouples with the same shape and specifications but different grades that share the same die. This can easily lead to the risk of material mixing during the production process. It is necessary to sort the mixed batches of components and separate the components of different grades. Otherwise, the end products may not be able to achieve the designed functions, or even be misused, leading to safety hazards.

[0003] Currently, two conventional methods are mainly used for sorting bimetallic thermal components: First, manually or using an automatic detection device to measure the resistivity of the bimetallic thermal components and sorting them based on different measured resistivities. However, this method cannot accurately distinguish different components when the resistivity of two or more bimetallic components mixed together is similar but their thermal curvature is different. Second, manually or using an automatic detection device to identify the etched grade of the bimetallic thermal components and sorting them based on different etched grades. However, this method is difficult to use because the components are small, especially for straight-shaped bimetallic thermal components, whose surface etched grades are often incomplete and irregular, making identification difficult. In particular, when the color of the etched grade on the component surface is light, this method cannot accurately distinguish different components.

[0004] Therefore, developing a sorting device for thermal bimetallic elements to solve the problems of high sorting difficulty and low sorting accuracy has become an important issue that urgently needs to be addressed. Summary of the Invention

[0005] To address the problems of high difficulty and low accuracy in sorting existing thermal bimetallic elements, this application provides an automatic sorting device and method for straight-bar thermal bimetallic elements.

[0006] An automatic sorting device for straight-bar type hot bimetallic elements includes a vibrating feeding mechanism, a magnetic orientation screening mechanism, and a detection and sorting mechanism; The discharge end of the vibrating feeding mechanism is provided with a conveying conduit. The vibrating feeding mechanism is connected to the inlet end of the magnetic orientation screening mechanism through the conveying conduit. The detection and sorting mechanism is located at the end of the magnetic orientation screening mechanism. The magnetic orientation screening mechanism is used to screen out the thermal bimetallic elements with the same low expansion layer orientation and convey them to the detection and sorting mechanism. The detection and sorting mechanism includes a heating unit and a sorting execution unit. The heating unit is used to heat the thermal bimetallic element. The sorting execution unit sorts the two thermal bimetallic elements according to their heating deformation. The end of the detection and sorting mechanism is connected to a bifurcated conduit, which includes a first conduit and a second conduit. The two thermal bimetallic elements with different temperature curvatures enter the first conduit or the second conduit after being sorted by the sorting execution unit.

[0007] By adopting the above technical solution, the vibrating feeding mechanism realizes the automatic feeding of bimetallic elements. The discharge end of the vibrating feeding mechanism is connected to the magnetic orientation screening mechanism through the conveying conduit to ensure the orderly conveying of elements. The magnetic orientation screening mechanism can screen out bimetallic elements with consistent low expansion layer orientation and convey them to the detection and sorting mechanism, ensuring that the low expansion layer orientation of the elements entering the detection and sorting mechanism is uniform, thus improving the accuracy of subsequent sorting. The heating unit in the detection and sorting mechanism heats the bimetallic elements. Bimetallic elements with different temperature curvatures have different deformations after heating. The sorting execution unit sorts the bimetallic elements according to the deformation. After sorting, the bimetallic elements enter the first or second conduit of the bifurcation conduit, thereby realizing the automatic sorting of straight bimetallic elements with different temperature curvatures. The whole process has a high degree of automation and can effectively improve the sorting efficiency and accuracy.

[0008] Furthermore, the magnetic orientation screening mechanism includes a magnetic conveyor belt unit, a first non-magnetic conveyor belt unit, and a second non-magnetic conveyor belt unit. A clearance space is provided between the first non-magnetic conveyor belt unit and the second non-magnetic conveyor belt unit. A collection bucket is provided at the bottom of the clearance space. The magnetic conveyor belt unit is located at the top of the clearance space, and the vertical projection of the input end of the magnetic conveyor belt unit and the output end of the first non-magnetic conveyor belt unit overlaps in the vertical direction. The vertical projection of the output end of the magnetic conveyor belt unit and the input end of the second non-magnetic conveyor belt unit also overlaps in the vertical direction. The hot bimetallic element with the low expansion layer facing upward passes through the first non-magnetic conveyor belt unit, the magnetic conveyor belt unit, and the second non-magnetic conveyor belt unit in sequence to enter the detection and sorting mechanism. The hot bimetallic element with the low expansion layer facing downward falls into the collection bucket after passing through the clearance space after passing through the first non-magnetic conveyor belt unit.

[0009] By adopting the above technical solution, the first non-magnetic conveyor belt unit, the magnetic conveyor belt unit, and the second non-magnetic conveyor belt unit in the magnetic orientation screening mechanism cooperate with each other. Utilizing the characteristic that the low-expansion layer of the thermal bimetallic element is magnetic while its high-expansion layer is non-magnetic, the thermal bimetallic element can be screened. When a thermal bimetallic element with its high-expansion layer facing upwards passes through the first non-magnetic conveyor belt unit, because its high-expansion layer is non-magnetic, the thermal bimetallic element cannot be magnetically attracted to the magnetic conveyor belt unit and can only fall into the collection bin through the clearance space. The thermal bimetallic elements in the collection bin are then poured into the vibrating feeding mechanism for the next screening. However, when a thermal bimetallic element with its low-expansion layer facing upwards passes through the first non-magnetic conveyor belt unit and enters the magnetic conveyor belt unit, because its low-expansion layer is magnetic, the thermal bimetallic element will be attracted to the magnetic conveyor belt unit. Therefore, the thermal bimetallic element with its low-expansion layer facing upwards can pass through the magnetic conveyor belt unit to reach the second non-magnetic conveyor belt unit, and then further enter the subsequent detection and sorting mechanism. This ensures that the low-expansion layer orientation of the elements entering the subsequent detection and sorting mechanism is uniform, improving the accuracy and efficiency of the sorting.

[0010] Furthermore, a scraper is provided at the bottom of the magnetic conveyor belt unit, and the scraper is provided with a clearance through hole. The magnetic conveyor belt of the magnetic conveyor belt unit is exposed through the clearance through hole, and the two ends of the scraper extend along the bottom ends of the magnetic conveyor belt unit to form guide portions.

[0011] By adopting the above technical solution, a scraper with clearance holes is set at the bottom of the magnetic conveyor belt unit, through which the magnetic conveyor belt is exposed. This allows the scraper to limit the hot bimetallic components adsorbed on the magnetic conveyor belt during the conveying process, ensuring the stability and orderliness of component transport. At the same time, the guide portions formed by the scraper extending from both ends of the bottom of the magnetic conveyor belt unit can better guide the hot bimetallic components with the low expansion layer facing upward to smoothly transition from the magnetic conveyor belt unit to the subsequent second non-magnetic conveyor belt unit, avoiding component deviation or falling during transport. This further improves the accuracy and efficiency of the magnetic orientation screening mechanism in screening hot bimetallic components with the same low expansion layer orientation, ensuring that the screened hot bimetallic components with the same low expansion layer orientation can be more stably transported to the detection and sorting mechanism.

[0012] Furthermore, the detection and sorting mechanism includes a detection pipe, and the heating unit is a conductive constant-temperature heating plate disposed on the bottom wall of the detection pipe. The sorting execution unit includes an adjustable conductive rod, a control power supply, an electromagnetic relay, and a rotatable baffle driven by the electromagnetic relay. The rotatable baffle is rotatably disposed at the entrance of the bifurcated conduit to block the entrance of the first or second conduit. The conductive rod is disposed at the top of the detection pipe and is located near the entrance of the bifurcated conduit. The positive terminal of the control power supply is connected to the conductive constant-temperature heating plate, and the negative terminal of the control power supply is connected to one electrical connection terminal of the electromagnetic relay. The other electrical connection terminal of the electromagnetic relay is connected to the conductive rod. When the hot bimetallic element is bent by heat and simultaneously contacts the conductive constant-temperature heating plate and the conductive rod, the conductive rod, control power supply, electromagnetic relay, and conductive constant-temperature heating plate form a closed loop, triggering the electromagnetic relay to drive a change in the direction of the rotatable baffle.

[0013] By adopting the above technical solution, the detection and sorting mechanism uses a conductive constant-temperature heating plate to heat the bimetallic element. The sorting execution unit sorts the bimetallic element based on its heating deformation. When the bimetallic element is heated and bent, it simultaneously contacts the conductive constant-temperature heating plate and the conductive rod. The conductive rod, control power supply, electromagnetic relay, and conductive constant-temperature heating plate form a closed loop, triggering the electromagnetic relay to drive the rotatable baffle to rotate. The rotatable baffle rotates and changes its position at the entrance of the bifurcated conduit. When the bimetallic element is not sufficiently bent by heat, it cannot simultaneously contact the conductive constant-temperature heating plate and the conductive rod, and a closed loop cannot be formed. The rotatable baffle remains stationary, thereby guiding the bimetallic element into the first or second conduit. This achieves automatic sorting based on the heating deformation of the bimetallic element, avoiding the dependence of traditional sorting methods on the resistivity and etching grade of the element, and improving sorting efficiency and accuracy.

[0014] It is worth noting that the purpose of ensuring that the low expansion layer faces upward is that when the thermal bimetallic element is heated, the high expansion layer elongates more and the low expansion layer elongates less, causing the thermal bimetallic element to bend towards the low expansion layer side, so that the thermal bimetallic element can simultaneously contact the heating plate at the bottom and the conductive rod at the top.

[0015] Furthermore, the sorting execution unit also includes a rotary motor controlled by the electromagnetic relay, the output shaft of which is connected to the rotating shaft of the rotatable baffle.

[0016] By adopting the above technical solution, under the control of the electromagnetic relay, the rotary motor can drive the rotatable baffle to rotate, enabling the sorting execution unit to change the position of the rotatable baffle more efficiently and stably, thereby guiding the hot bimetallic element into the corresponding conduit more accurately and realizing automatic sorting.

[0017] Furthermore, a torsion spring is provided on the rotation shaft of the rotatable baffle to reset the rotatable baffle to its initial position after the electromagnetic relay is de-energized.

[0018] By adopting the above technical solution, when the bimetallic element has not reached the deformation stage, that is, when it cannot simultaneously contact the conductive constant temperature heating plate and the conductive rod, the electromagnetic relay is de-energized, and the torsion spring can reset the rotatable baffle to the initial position. This ensures that after each sorting action is completed, the rotatable baffle can be restored to the initial state in time, preparing for the next sorting, enabling the device to operate continuously and stably, and ensuring the continuity and efficiency of the automatic sorting process of the straight-bar bimetallic element.

[0019] Furthermore, the vibratory feeding mechanism includes a vibratory base and a vibratory plate disposed on the top of the vibratory base. The inner wall of the vibratory plate is provided with a feeding track that spirals upward from the bottom, and the inlet of the conveying conduit is connected to the outlet of the end of the feeding track.

[0020] By adopting the above technical solution, the vibrating base is used to make the vibrating plate vibrate. Combined with the feeding track that spirals upward on the inner wall, the messy hot bimetallic components can be arranged in an orderly manner and continuously transported through the conveying conduit, ensuring that the components can enter the subsequent screening and sorting process in an orderly manner.

[0021] Furthermore, the end of the first conduit is connected to a first recycling bin, and the end of the second conduit is connected to a second recycling bin.

[0022] By adopting the above technical solution, the ends of the first conduit and the second conduit are respectively connected to the first recycling box and the second recycling box, which facilitates the collection of different grades of hot bimetallic components after sorting, avoids the components from scattering, ensures that the automatic sorting work is carried out in an orderly manner, and makes it easier to sort and use the components in the future.

[0023] The present invention also provides an automatic sorting method for straight-bar type thermal bimetallic elements, applied to the above-mentioned automatic sorting device for straight-bar type thermal bimetallic elements, comprising the following steps: S1: The disordered hot bimetallic elements are arranged in an orderly manner by the vibrating feeding mechanism and continuously transported to the magnetic orientation screening mechanism through the conveying conduit; S2: The magnetic orientation screening mechanism is used to perform magnetic screening on the orderly conveyed thermal bimetallic elements, so that the thermal bimetallic elements with the low expansion layer facing down are rejected during the conveying process, and only the thermal bimetallic elements with the low expansion layer facing up are allowed to pass through and enter the detection and sorting mechanism. S3: The hot bimetallic element with the low expansion layer facing upward is brought into the detection pipe of the detection and sorting mechanism, and the hot bimetallic element comes into contact with the conductive constant temperature heating plate at the bottom of the detection pipe for heating. S4: When the bimetallic element is heated, it bends upward. When the bimetallic element simultaneously contacts the conductive constant-temperature heating plate and the conductive rod above the detection pipe, the control circuit of the detection and sorting mechanism is activated, triggering the electromagnetic relay in the control circuit to drive the rotatable baffle to rotate. The rotatable baffle blocks the entrance of the second conduit of the bifurcated conduit, guiding the bimetallic element into the first conduit of the bifurcated conduit. However, when the upward bending deformation of the bimetallic element after being heated prevents it from simultaneously contacting the conductive constant-temperature heating plate and the conductive rod above the detection pipe, the rotatable baffle blocks the entrance of the first conduit, guiding the bimetallic element into the second conduit, thus achieving automatic sorting.

[0024] Step S2 includes the following steps: S21: The first non-magnetic conveyor belt unit of the magnetic orientation screening mechanism receives and conveys the hot bimetallic element from the conveying conduit; S22: The thermal bimetallic element is transferred from the output end of the first non-magnetic conveyor belt unit to the input end of the magnetic conveyor belt unit; S23: The thermal bimetallic element with the low expansion layer facing down falls from the clearance space between the first and second non-magnetic conveyor belt units of the magnetic orientation screening mechanism into the collection bucket because it cannot be adsorbed onto the magnetic conveyor belt unit. S24: The thermal bimetallic element with the low expansion layer facing upward is adsorbed onto the magnetic conveyor belt unit of the magnetic orientation screening mechanism, and is transferred to the second non-magnetic conveyor belt unit via the magnetic conveyor belt unit. The second non-magnetic conveyor belt unit transfers the thermal bimetallic element with the low expansion layer facing upward to the detection and sorting mechanism to achieve screening.

[0025] By adopting the above technical solution, this automatic sorting method utilizes the automatic sorting device of this application to achieve automatic sorting of straight-line hot bimetallic elements. The vibrating feeding mechanism can arrange and transport disordered elements in an orderly manner, and the magnetic orientation screening mechanism can reject elements with the low expansion layer facing downwards, ensuring that hot bimetallic elements with the low expansion layer facing upwards enter the detection and sorting mechanism. After entering the detection and sorting mechanism, the hot bimetallic elements are brought into contact with the conductive constant temperature heating plate for heating. Utilizing the characteristic that the hot bimetallic elements will bend and deform when heated, when the element bends upwards to a certain extent, it simultaneously contacts the conductive constant temperature heating plate and the conductive rod above the detection pipe. When the control circuit of the sorting mechanism is activated, it triggers the electromagnetic relay in the control circuit. The electromagnetic relay drives the rotatable baffle to rotate, changing the position of the rotatable baffle at the entrance of the bifurcated conduit. If the bending degree is insufficient, the control circuit cannot be activated, and the rotatable baffle remains stationary, thereby guiding the first or second conduit into the bifurcated conduit. This achieves automatic sorting of different grades of hot bimetallic components. The entire process requires minimal manual intervention, saving manpower and improving sorting efficiency. At the same time, it avoids the dependence of traditional sorting methods on component resistivity and etching grade, reducing sorting difficulty and improving sorting accuracy.

[0026] In summary, this application includes at least the following beneficial technical effects: This application establishes a vibratory feeding mechanism, a magnetic orientation screening mechanism, and a detection and sorting mechanism. The vibratory feeding mechanism arranges and continuously conveys the disordered bimetallic elements in an orderly manner. The magnetic orientation screening mechanism can screen out bimetallic elements with consistent low expansion layer orientation. The detection and sorting mechanism can sort the bimetallic elements based on their heating deformation. The entire process achieves automated sorting, greatly saving labor resources and solving the problems of high sorting difficulty and low sorting accuracy of existing bimetallic elements. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an automatic sorting device for straight-bar type hot bimetallic elements provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a magnetic conveyor belt unit for an automatic sorting device for straight-bar hot bimetallic elements provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the detection and sorting mechanism and the bifurcated conduit of an automatic sorting device for straight-bar type hot bimetallic elements provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the detection and sorting mechanism and the branching conduit of an automatic sorting device for straight-bar type hot bimetallic elements provided in an embodiment of the present invention. Explanation of reference numerals in the attached figures: 1. Vibrating feeding mechanism; 11. Vibrating base; 12. Vibrating plate; 13. Conveying conduit; 2. Magnetic orientation screening mechanism; 21. First non-magnetic conveyor belt unit; 22. Magnetic conveyor belt unit; 221. Scraper; 2211. Clearance hole; 2212. Guide part; 23. Second non-magnetic conveyor belt unit; 24. Avoidance space; 25. Collection bucket; 3. Detection and sorting mechanism; 31. Detection pipe; 32. Conductive constant temperature heating plate; 33. Conductive rod; 34. Rotatable baffle; 4. Branching conduit; 41. First conduit; 42. Second conduit. Detailed Implementation

[0028] The following combination Figure 1-4 The technical solutions in the embodiments of the present invention will be described in detail. Example 1 See Figure 1 Example 1 provides an automatic sorting device for straight-bar type hot bimetallic elements, including a vibrating feeding mechanism 1, a magnetic orientation screening mechanism 2, and a detection and sorting mechanism 3; The vibrating feeding mechanism 1 includes a vibrating base 11 and a vibrating disk 12 disposed on the top of the vibrating base 11. The discharge end of the vibrating disk 12 is provided with a conveying conduit 13. The vibrating disk 12 is connected to the feed end of the magnetic orientation screening mechanism 2 through the conveying conduit 13. The inner wall of the vibrating disk 12 is provided with a feeding track that spirals upward from the bottom. When the vibrating feeding mechanism 1 is working, it arranges the disordered hot bimetallic elements in the vibrating disk 12 in an orderly manner and continuously conveys them to the magnetic orientation screening mechanism 2 through the conveying conduit 13.

[0029] The magnetic orientation screening mechanism 2 includes a first non-magnetic conveyor belt unit 21, a magnetic conveyor belt unit 22, and a second non-magnetic conveyor belt unit 23. A clearance space 24 is provided between the first non-magnetic conveyor belt unit 21 and the second non-magnetic conveyor belt unit 23. A collection bucket 25 is provided at the bottom of the clearance space 24. The magnetic conveyor belt unit 22 is located at the top of the clearance space 24. The input end of the magnetic conveyor belt unit 22 overlaps with the vertical projection of the output end of the first non-magnetic conveyor belt unit 21, and the output end of the magnetic conveyor belt unit 22 overlaps with the vertical projection of the input end of the second non-magnetic conveyor belt unit 23.

[0030] Therefore, during the transfer process of the thermal bimetallic element in the magnetic orientation screening mechanism 2, since the low expansion layer of the thermal bimetallic element is magnetic while the high expansion layer is not, when the thermal bimetallic element with the low expansion layer facing upward passes through the first non-magnetic conveyor belt unit 21 and enters the magnetic conveyor belt unit 22, the thermal bimetallic element will be attracted to the magnetic conveyor belt of the magnetic conveyor belt unit 22. The thermal bimetallic element with the low expansion layer facing upward can be transferred through the magnetic conveyor belt unit 22 to the second non-magnetic conveyor belt unit 23, and then the second non-magnetic conveyor belt unit 23 will transfer the thermal bimetallic element with the low expansion layer facing upward to the detection and sorting mechanism 3. However, after the thermal bimetallic element with the high expansion layer facing upward passes through the first non-magnetic conveyor belt unit 21, the thermal bimetallic element cannot be magnetically attracted to the magnetic conveyor belt unit 22, and can only fall into the collection bucket 25 through the avoidance space 24 for the next screening. This ensures that the low expansion layer of the element entering the subsequent detection and sorting mechanism faces upward, improving the accuracy and efficiency of sorting.

[0031] To ensure a smooth transition of the thermal bimetallic element from the magnetic conveyor belt unit 22 to the second non-magnetic conveyor belt unit 23, refer to... Figure 2 A scraper 221 is provided at the bottom of the magnetic conveyor belt unit 22. The scraper 221 is provided with a clearance through hole 2211. The magnetic conveyor belt of the magnetic conveyor belt unit 22 is exposed through the clearance through hole 2211. The two ends of the scraper 221 extend along the bottom ends of the magnetic conveyor belt unit 22 to form guide parts 2212, so as to prevent the hot bimetallic element on the magnetic conveyor belt unit 22 from failing to reach the second non-magnetic conveyor belt unit 23 as the magnetic conveyor belt is transferred.

[0032] See Figure 3-4 The detection and sorting mechanism 3 is located at the end of the magnetic orientation screening mechanism 2. The end of the detection and sorting mechanism 3 is connected to a bifurcated conduit 4, which includes a first conduit 41 and a second conduit 42. The detection and sorting mechanism 3 includes a heating unit and a sorting execution unit. In this embodiment, the detection and sorting mechanism 3 is provided with a detection pipe 31. The heating unit is a conductive constant temperature heating plate 32, which is located on the bottom wall of the detection pipe 31. The sorting execution unit includes an adjustable conductive rod 33, a control power supply, an electromagnetic relay, and a rotatable baffle 34 driven by the electromagnetic relay. The conductive rod 33 is located at the top of the detection pipe 31 and is close to the entrance of the bifurcated conduit 4. The positive terminal of the control power supply is connected to the conductive constant temperature heating plate 32, and the negative terminal of the control power supply is connected to one electrical connection terminal of the electromagnetic relay. The other electrical connection terminal of the electromagnetic relay is connected to the conductive rod 33. The rotatable baffle 34 is rotatably located at the entrance of the bifurcated conduit 4 to block the entrance of the first conduit 41.

[0033] Before the bimetallic element enters the detection pipe 31 of the detection and sorting mechanism 3, the temperature of the conductive constant temperature heating plate 32 is adjusted so that the temperature range is 150-300℃. In this embodiment, the temperature of the conductive constant temperature heating plate 32 is kept constant at 200℃. The operator needs to find the temperature curvature of the two bimetallic materials and calculate the deformation of the bimetallic element with higher temperature curvature when passing through the conductive constant temperature heating plate 32, thereby adjusting the height position of the conductive rod 33.

[0034] When the bimetallic element is heated by the conductive thermostatic heating plate 32, the bimetallic element with higher thermal curvature bends under heat and simultaneously contacts the conductive thermostatic heating plate 32 and the conductive rod 33. The conductive rod 33, the control power supply, the electromagnetic relay, and the conductive thermostatic heating plate 32 form a closed loop, triggering the electromagnetic relay to drive a change in the direction of the rotatable baffle 34. This causes the rotatable baffle 34 to block the entrance of the second conduit 42, allowing the bimetallic element with higher thermal curvature to enter the first conduit 41. Meanwhile, the bimetallic element with lower thermal curvature cannot simultaneously contact the conductive thermostatic heating plate 32 and the conductive rod 33 when it bends under heat. The conductive rod 33, the control power supply, the electromagnetic relay, and the conductive thermostatic heating plate 32 cannot form a closed loop, and the rotatable baffle 34 remains at the entrance of the first conduit 41. The bimetallic element with lower thermal curvature then enters the second conduit 42, thus achieving screening.

[0035] As an optional implementation, there are more than one method for controlling the rotation of the rotatable baffle 34 by the electromagnetic relay, which will not be described in detail here. In this embodiment, the sorting execution unit also includes a rotary motor controlled by the electromagnetic relay. The output shaft of the rotary motor is connected to the rotating shaft of the rotatable baffle 34. Under the control of the electromagnetic relay, the rotary motor can drive the rotatable baffle 34 to rotate.

[0036] To ensure the continuity and efficiency of the automatic sorting process of the straight-bar type hot bimetallic element, a torsion spring is provided on the rotating shaft of the rotatable baffle 34. This spring is used to reset the rotatable baffle 34 to its initial position after the electromagnetic relay is de-energized. That is, when the deformation of the hot bimetallic element fails to simultaneously contact the conductive constant temperature heating plate 32 and the conductive rod 33, the electromagnetic relay is de-energized, and the torsion spring resets the rotatable baffle 34 to the entrance of the first conduit 41, ensuring that the hot bimetallic element with a lower temperature curvature enters the second conduit 42.

[0037] Furthermore, the end of the first conduit 41 is connected to a first recycling box, and the end of the second conduit 42 is connected to a second recycling box, which facilitates the collection of different grades of thermal bimetallic elements after sorting.

[0038] Example 2 Example 2 provides an automatic sorting method for straight-bar type thermal bimetallic elements, applied to an automatic sorting device for straight-bar type thermal bimetallic elements in Example 1, comprising the following steps: S1: The random hot bimetallic elements are arranged in an orderly manner by the vibrating feeding mechanism 1 and continuously transported to the magnetic orientation screening mechanism 2 through the conveying conduit 13; S2: The magnetic orientation screening mechanism 2 is used to perform magnetic screening on the orderly conveyed thermal bimetallic elements, so that the thermal bimetallic elements with the low expansion layer facing down are rejected during the conveying process, and only the thermal bimetallic elements with the low expansion layer facing up pass through and enter the detection and sorting mechanism 3. S3: The hot bimetallic element with the low expansion layer facing upward enters the detection pipe 31 of the detection and sorting mechanism 3, and the hot bimetallic element contacts the conductive constant temperature heating plate 32 at the bottom of the detection pipe 31 for heating. S4: When the bimetallic element is heated, it bends upward. When the bimetallic element simultaneously contacts the conductive constant temperature heating plate 32 and the conductive rod 33 above the detection pipe 31, the control circuit of the detection and sorting mechanism 3 is turned on, triggering the electromagnetic relay in the control circuit to drive the rotatable baffle 34 to rotate. The rotatable baffle 34 blocks the entrance of the second conduit 42 of the bifurcation conduit 4, guiding the bimetallic element into the first conduit 41 of the bifurcation conduit 4. When the upward bending deformation of the bimetallic element after being heated cannot simultaneously contact the conductive constant temperature heating plate 32 and the conductive rod 33 above the detection pipe 31, the rotatable baffle 34 blocks the entrance of the first conduit 41, guiding the bimetallic element into the second conduit 42, thus realizing automatic sorting.

[0039] Step S2 includes the following steps: S21: The first non-magnetic conveyor belt unit 21 of the magnetic orientation screening mechanism 2 receives and conveys the hot bimetallic element from the conveying conduit 13; S22: The hot bimetallic element is transferred from the output end of the first non-magnetic conveyor belt unit 21 to the input end of the magnetic conveyor belt unit 22; S23: The hot bimetallic element with the low expansion layer facing downwards cannot be adsorbed on the magnetic conveyor belt unit 22 and falls from the clearance space 24 between the first non-magnetic conveyor belt unit 21 and the second non-magnetic conveyor belt unit 23 of the magnetic orientation screening mechanism 2 into the collection bucket 25. S24: The hot bimetallic element with the low expansion layer facing upward is adsorbed onto the magnetic conveyor belt unit 22 of the magnetic orientation screening mechanism 2, and is transferred to the second non-magnetic conveyor belt unit 23 via the magnetic conveyor belt unit 22. The second non-magnetic conveyor belt unit 23 transfers the hot bimetallic element with the low expansion layer facing upward to the detection and sorting mechanism 3 to achieve screening.

[0040] It is worth noting that before starting the detection and sorting mechanism 3, the temperature of the conductive constant temperature heating plate 32 needs to be set in advance, and the height position of the conductive rod 33 needs to be adjusted according to the deformation of the thermal curvature of the hot bimetallic element to be sorted at the set temperature.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic sorting device for straight strip thermal bimetallic elements, characterized by: It comprises a vibrating feeding mechanism (1), a magnetic orientation screening mechanism (2) and a detection sorting mechanism (3); The vibrating feeding mechanism (1) is provided with a conveying guide pipe (13) at the discharging end, the vibrating feeding mechanism (1) is connected with the feeding end of the magnetic orientation screening mechanism (2) through the conveying guide pipe (13), and the detection sorting mechanism (3) is arranged at the tail end of the magnetic orientation screening mechanism (2); the magnetic orientation screening mechanism (2) is used for screening the hot bimetallic element with consistent low expansion layer orientation and conveying to the detection sorting mechanism (3); The detection sorting mechanism (3) comprises a heating unit and a sorting execution unit, the heating unit is used for heating the hot bimetallic element, the sorting execution unit sorts according to the heating deformation amount of two kinds of hot bimetallic elements, and the tail end of the detection sorting mechanism (3) is connected with a bifurcated guide pipe (4); the bifurcated guide pipe (4) comprises a first guide pipe (41) and a second guide pipe (42), and two kinds of hot bimetallic elements with different temperature curvatures enter the first guide pipe (41) or the second guide pipe (42) after being sorted by the sorting execution unit.

2. An apparatus for automatic sorting of straight strip thermal bimetallic elements as claimed in claim 1, wherein: The magnetic orientation screening mechanism (2) comprises a magnetic conveying belt unit (22), a first non-magnetic conveying belt unit (21) and a second non-magnetic conveying belt unit (23), a position-avoiding space (24) is arranged between the first non-magnetic conveying belt unit (21) and the second non-magnetic conveying belt unit (23), a collecting barrel (25) is arranged at the bottom of the position-avoiding space (24), the magnetic conveying belt unit (22) is arranged at the top of the position-avoiding space (24), the projection part of the input head of the magnetic conveying belt unit (22) and the output tail of the first non-magnetic conveying belt unit (21) in the vertical direction overlaps, and the projection part of the output tail of the magnetic conveying belt unit (22) and the input head of the second non-magnetic conveying belt unit (23) in the vertical direction overlaps, wherein the hot bimetallic element with the low expansion layer upward passes through the first non-magnetic conveying belt unit (21), the magnetic conveying belt unit (22) and the second non-magnetic conveying belt unit (23) in sequence and enters the detection sorting mechanism (3), and the hot bimetallic element with the low expansion layer downward falls into the collecting barrel (25) through the position-avoiding space (24) after passing through the first non-magnetic conveying belt unit (21).

3. An apparatus for automatic sorting of straight strip thermal bimetallic elements as claimed in claim 2, wherein: The bottom of the magnetic conveying belt unit (22) is provided with a scraper (221), the scraper (221) is provided with a position-avoiding through hole (2211), the magnetic conveying belt of the magnetic conveying belt unit (22) is exposed through the position-avoiding through hole (2211), and the two ends of the scraper (221) extend along the two ends of the bottom of the magnetic conveying belt unit (22) to form a guide part (2212).

4. An apparatus for automatic sorting of straight strip thermal bimetallic elements according to any one of claims 1 to 3, characterized in that: The detection sorting mechanism (3) is provided with a detection pipeline (31), the heating unit is a conductive constant temperature heating plate (32), the conductive constant temperature heating plate (32) is arranged on the bottom wall of the detection pipeline (31), the sorting execution unit comprises an adjustable conductive rod (33), a control power supply, an electromagnetic relay and a rotatable baffle (34) driven to rotate by the electromagnetic relay, the rotatable baffle (34) is rotationally arranged at the inlet of the bifurcated pipeline (4) and is used for blocking the inlet of the first pipeline (41) or the second pipeline (42), the conductive rod (33) is arranged on the top of the detection pipeline (31) and is close to the inlet of the bifurcated pipeline (4), the positive electrode of the control power supply is connected with the conductive constant temperature heating plate (32), the negative electrode of the control power supply is connected with one electrical connection end of the electromagnetic relay, the other electrical connection end of the electromagnetic relay is connected with the conductive rod (33), when the thermal bimetallic element is bent by heat and simultaneously contacts the conductive constant temperature heating plate (32) and the conductive rod (33), the conductive rod (33), the control power supply, the electromagnetic relay and the conductive constant temperature heating plate (32) form a closed loop, the electromagnetic relay is triggered to drive the direction of the rotatable baffle (34) to be changed.

5. An apparatus for automatic sorting of straight strip thermal bimetallic elements as defined in claim 4, wherein: The sorting execution unit further comprises a rotary motor controlled by the electromagnetic relay, and an output shaft of the rotary motor is in transmission connection with a rotating shaft of the rotatable baffle (34).

6. An automatic sorting device for straight strip thermal bimetallic elements according to claim 5, characterized in that: A torsional spring is arranged on the rotating shaft of the rotatable baffle (34) and is used for resetting the rotatable baffle (34) to an initial position after the electromagnetic relay is powered off.

7. The apparatus according to claim 1, wherein: The vibration feeding mechanism (1) comprises a vibration base (11) and a vibration disc (12) arranged on the top of the vibration base (11), an inner wall of the vibration disc (12) is provided with a feeding track spirally rising from the bottom, and an inlet of the conveying pipeline (13) is connected with an outlet of the feeding track.

8. The apparatus according to claim 1, wherein: The end of the first pipeline (41) is connected with a first recycling box, and the end of the second pipeline (42) is connected with a second recycling box.

9. The automatic sorting method for straight strip thermal bimetallic element, which is applied to the automatic sorting device for straight strip thermal bimetallic element in any one of claims 1-8, characterized in that: The method comprises the following steps: S1: orderly arranging disordered thermal bimetallic elements by the vibration feeding mechanism (1) and continuously conveying the thermal bimetallic elements to the magnetic orientation screening mechanism (2) through the conveying pipeline (13); S2: magnetically screening the orderly conveyed thermal bimetallic elements by the magnetic orientation screening mechanism (2), so that the thermal bimetallic elements with the low expansion layer downward are removed in the conveying process, and only the thermal bimetallic elements with the low expansion layer upward pass through and enter the detection sorting mechanism (3); S3: making the thermal bimetallic elements with the low expansion layer upward enter the detection pipeline (31) of the detection sorting mechanism (3), and the thermal bimetallic elements contact the conductive constant temperature heating plate (32) at the bottom of the detection pipeline (31) to be heated. S4: the thermal bimetallic element bends upward after being heated, when the thermal bimetallic element contacts the conductive rod (33) above the conductive constant-temperature heating plate (32) and the detection pipeline (31) at the same time, the control loop of the detection and sorting mechanism (3) is turned on, the electromagnetic relay in the control loop is triggered to drive the rotatable baffle (34) to rotate, the rotatable baffle (34) blocks the entrance of the first pipeline (41) of the bifurcated pipeline (4), and guides the thermal bimetallic element to enter the first pipeline (41) of the bifurcated pipeline (4); when the deformation amount of the thermal bimetallic element bending upward after being heated cannot contact the conductive rod (33) above the conductive constant-temperature heating plate (32) and the detection pipeline (31) at the same time, the rotatable baffle (34) blocks the entrance of the first pipeline (41), and guides the thermal bimetallic element to enter the second pipeline (42), so as to realize automatic sorting.

10. The automatic sorting method for a straight strip type thermal bimetallic element according to claim 9, characterized by: The step S2 comprises the following steps: S21: the first non-magnetic conveying belt unit (21) of the magnetic orientation screening mechanism (2) receives and conveys the thermal bimetallic element from the conveying pipeline (13); S22: the thermal bimetallic element is moved from the output end of the first non-magnetic conveying belt unit (21) to the input end of the magnetic conveying belt unit (22); S23: the thermal bimetallic element with the low-expansion layer facing downward falls from the avoidance space (24) between the first non-magnetic conveying belt unit (21) and the second non-magnetic conveying belt unit (23) of the magnetic orientation screening mechanism (2) to the collection barrel (25) because it cannot be adsorbed on the magnetic conveying belt unit (22); S24: the thermal bimetallic element with the low-expansion layer facing upward is adsorbed on the magnetic conveying belt unit (22) of the magnetic orientation screening mechanism (2), and is moved to the second non-magnetic conveying belt unit (23) through the magnetic conveying belt unit (22), and the second non-magnetic conveying belt unit (23) moves the thermal bimetallic element with the low-expansion layer facing upward to the detection and sorting mechanism (3), so as to realize screening.

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