A control tray detection system for a heat treatment roller furnace

Abstract

This utility model discloses a control tray detection system for a heat treatment roller furnace, comprising: a heating furnace, in which several rollers are laid, and the area above the rollers forms a tray running channel inside the heating furnace through the side walls and top of the heating furnace; one end of the heating furnace is a feeding end, and the tray running channel corresponding to the feeding end is a loading area; detection mechanisms are provided on the two side walls of the heating furnace outside the tray running channel, each detection mechanism containing several detection components, which are arranged in pairs on the two side walls of the heating furnace in a high-low configuration; the two high-low detection components of each unit are inclined and penetrate the side wall of the heating furnace, and the two detection components correspond to each other to form a photoelectric relationship; this design of the photoelectric switch installation and control method effectively solves the problem of inaccurate tray detection caused by the excessive thickness of the tray.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment technology, specifically to a control tray detection system for heat treatment roller furnaces, used for detecting and controlling tray information in heat treatment roller furnaces. Background Technology

[0002] In heat treatment roller furnaces, the actual position of the material tray needs to be detected during product transmission. Products are placed on the tray inside the furnace, and photoelectric switches are typically used for detection. Traditional roller furnace tray detection designs used horizontally mounted photoelectric switches, which was feasible when the tray was thick enough. However, recent process optimizations have led to increasingly thinner trays, reducing procurement costs and increasing loading weight. A key challenge now is achieving precise control even with thinner trays. This is crucial to prevent inaccurate detection when the tray is thin, some workpieces have diameters much smaller than the tray, or certain areas are empty. It's also important to avoid situations where products are placed on the tray but their height doesn't reach the photoelectric switch's detection level, resulting in undetected products and inaccurate detection. Utility Model Content

[0003] In view of the technical problems existing in the design of the material tray detection system of the heat treatment roller furnace, the purpose of this utility model is to provide a control material tray detection system for the heat treatment roller furnace. By designing the installation and control method of the photoelectric switch, the system effectively solves the problem of inaccurate material tray detection caused by the material tray being too thin.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a heat treatment roller furnace control tray detection system, comprising: a heating furnace, wherein a plurality of rollers are horizontally and evenly laid from one end to the other in the heating furnace, and the area above the plurality of rollers forms a tray running channel inside the heating furnace through the side wall and top of the heating furnace; one end of the heating furnace is the feeding end, and the tray running channel corresponding to the feeding end is the loading area, and a furnace door is set on the tray running channel near the loading area; detection mechanisms are set on the two side walls of the heating furnace outside the tray running channel, the detection mechanisms containing a plurality of detection components, the detection mechanisms being arranged in pairs of detection components as a unit on the two side walls of the heating furnace, and the positions of the pairs of detection components in each unit on the two side walls of the heating furnace forming a high-low arrangement; the two high-low detection components of each unit are inclined to penetrate the side wall of the heating furnace, and the two detection components correspond to each other to form a facing relationship;

[0005] Furthermore, a front airlock chamber is installed near the furnace door in the material tray running channel, and a rear airlock chamber is installed at the end of the material tray running channel;

[0006] Furthermore, several detection component units on both sides of the heating furnace are distributed regionally from the front airlock chamber to the rear airlock chamber of the heating furnace.

[0007] Furthermore, several detection component units are sequentially divided on the side wall of the heating furnace from the direction of the heating furnace feed end to the direction of the end into a front airlock chamber position area, multiple work station areas and a rear airlock chamber position area.

[0008] Furthermore, the area between the first two detection component units on the side wall of the heating furnace in the direction of the feed end is the front airlock chamber area, and the last two detection component units at the end of the heating furnace belong to the rear airlock chamber area; each station area between the rear end of the front airlock chamber and the front end of the rear airlock chamber is composed of two detection component units.

[0009] Furthermore, the distance between the two detection component units at each station is the same, specifically the distance of 4-5 rollers in the heating furnace.

[0010] Furthermore, each unit has two detection components, one high and one low, which are a high point detection component and a low point detection component. The high point detection component of each unit is located on one side wall of the heating furnace and is higher than the height of the roller in the heating furnace, while the low point detection component is located on the other side wall of the heating furnace and is lower than the height of the roller in the heating furnace.

[0011] Furthermore, the high-point detection component and the low-point detection component of each unit form a beam of light that is directed towards each other, and the beam of light forms a 15° angle with the horizontal line at the height of the roller in the heating furnace.

[0012] Furthermore, each unit's two detection components include a photoelectric switch and a grating mechanism; the grating mechanism includes: a grating tube, a grating tube base, and a manual valve; the grating tube is connected to the inner side wall of the heating furnace, the front end of the grating tube is the injection inlet, the bottom of the grating tube near the injection inlet is connected through the grating tube base, the photoelectric switch is fixedly connected on the grating tube base, the photoelectric switch corresponds to the injection inlet position of the grating tube, so that the light emitted by the photoelectric switch passes through the grating tube and enters the interior of the heating furnace;

[0013] Furthermore, borosilicate glass is fixed at the entrance of the grating tube, and the borosilicate glass has the function of insulating heat.

[0014] The photoelectric switch is connected to the electrical cabinet located in the heating furnace via a wire, and the photoelectric switch transmits the signal to the PLC system.

[0015] The grating tube is equipped with a manual valve at its upper part for replacing the glass;

[0016] Furthermore, the two photoelectric switches of the two detection components in each unit form a pair of laser through-beam photoelectric switches; one photoelectric switch is a transmitter and the other photoelectric switch is a receiver; after being powered on, the transmitter projects a beam of light onto the receiver, thereby forming through-beam light.

[0017] Based on this solution, the internal environment of the furnace is kept clean during the heating process to prevent internal dust from interfering with the photoelectric switch detection. Several nitrogen pipelines are set on the two side walls of the heating furnace. Each nitrogen pipeline is connected to the grating tube in each detection component. All nitrogen pipelines are connected to the nitrogen outlet pipe at the top of the heating furnace. The nitrogen source enters from the top of the heating furnace through the nitrogen inlet pipe and uses a temperature equalization fan to make the nitrogen flow from the nitrogen outlet pipe to each nitrogen pipeline, thereby providing nitrogen to the grating tube.

[0018] Based on the above detection of the material tray in the material tray running channel, the running structure of the material tray on the roller needs to be individually controlled and reciprocated in each work station area until the set time is reached before entering the next work station area, so as to ensure uniform heating of the product.

[0019] Each workstation area is equipped with a motor that synchronously controls each roller in that workstation area. The material tray moves between workstation areas as follows: when the material tray reaches the photoelectric switch position at the end of the workstation area, the material tray is detected, and the motor drives each roller in that workstation area to move back; when the material tray is driven back to the photoelectric switch at the beginning of the workstation area, the motor drives each roller in that workstation area to move towards the next workstation area; this process is repeated, and the material tray moves between the two photoelectric switches in the workstation area via the rollers until a set time is reached, at which point it is synchronously moved to the next workstation area.

[0020] The beneficial effects of using the detection system of this utility model are:

[0021] By changing the traditional horizontal installation of the photoelectric switch in the roller furnace feed tray detection, and instead designing the photoelectric switch at an angle, so that the light emitted by the photoelectric switch forms a 15° angle with the horizontal plane, this design of the photoelectric switch installation and control method effectively solves the problem of inaccurate feed tray detection caused by the excessive thickness of the feed tray. Attached Figure Description

[0022] Figure 1 This is a structural diagram of a detection system according to an embodiment of the present invention.

[0023] Figure 2 for Figure 1 Top view.

[0024] Figure 3 for Figure 1 Rear view.

[0025] Figure 4 for Figure 1 Side view.

[0026] Figure 5 for Figure 1 Enlarged view of the detection component structure.

[0027] In the diagram, 1. Heating furnace, 2. Roller, 1.1. Side wall, 1.2. Top, 3. Material tray running channel, 4. Feed end, 5. Detection component, 6. Front airlock chamber position area, 7. Rear airlock chamber position area, 8. First station area, 9. Second station area, 10. Third station area, 11. Fourth station area, 12. Fifth station area, 13. Material tray, 14. Photoelectric switch, 15. Grating tube, 16. Grating tube base, 17. Manual valve, 18. Nitrogen pipeline, 19. Nitrogen outlet pipe, 20. Nitrogen inlet pipe. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] See Figure 1-5 The system described herein is a control tray detection system for a heat treatment roller furnace, comprising: a heating furnace 1, wherein a plurality of rollers 2 are horizontally and uniformly laid from one end to the other in the heating furnace 1, and the area above the plurality of rollers 2 forms a tray running channel 3 inside the heating furnace 1 through the side wall 1.1 and the top 1.2 of the heating furnace 1; one end of the heating furnace 1 is a feeding end 4, and the tray running channel 3 corresponding to the feeding end 4 is a loading area, and a furnace door is provided on the tray running channel 3 near the loading area; detection mechanisms are provided on the two side walls 1.1 of the heating furnace 1 outside the tray running channel 3, and the detection mechanisms include a plurality of detection components 5, which are arranged in pairs on the two side walls 1.1 of the heating furnace 1, with the pairs of detection components 5 in each unit arranged in a high-low configuration on the two side walls 1.1 of the heating furnace 1; the two high-low detection components 5 of each unit are inclined to penetrate the side wall 1.1 of the heating furnace, and the two detection components 5 correspond to each other to form a photosensitive relationship;

[0030] Furthermore, a front airlock chamber is provided near the furnace door in the material tray running channel 3, and a rear airlock chamber is located at the end of the material tray running channel 3;

[0031] Furthermore, several detection component units on the two side walls 1.1 of the heating furnace are distributed regionally from the front airlock chamber position to the rear airlock chamber position of the heating furnace 1;

[0032] Furthermore, several detection component units are sequentially divided on the side wall 1.1 of the heating furnace from the feeding end 4 of the heating furnace to the end direction into a front airlock chamber position area 6, multiple work station areas and a rear airlock chamber position area 7.

[0033] Specifically, a heating furnace 1 is typically set up with 8 workstation areas, and in this embodiment, it is preferably set up with 5 workstation areas; that is, a number of detection component units are divided on the side wall 1.1 of the heating furnace from the feeding end 4 to the end direction into the front airlock chamber position area 6, the first workstation area 8, the second workstation area 9, the third workstation area 10, the fourth workstation area 11, the fifth workstation area 12 and the rear airlock chamber area 7.

[0034] Furthermore, the area between the first two detection component units in the direction of the feed end 4 on the side wall 1.1 of the heating furnace is the front airlock chamber area 6, and the last two detection component units at the end of the heating furnace 1 belong to the rear airlock chamber area 7; each station area between the rear end of the front airlock chamber 6 and the front end of the rear airlock chamber 7 is composed of two detection component units; five station areas are set up, with the area between the first and second detection component units being the front airlock chamber area 6, the area between the third and fourth detection component units being the first station area 8, the area between the fifth and sixth detection component units being the second station area 9, the area between the seventh and eighth detection component units being the third station area 10, the area between the ninth and tenth detection component units being the fourth station area 11, and the area between the eleventh and twelfth detection component units being the fifth station area 12;

[0035] Furthermore, the distance between the two detection component units at each station is the same, specifically 4-5 times the distance of the rollers 2 in the heating furnace 1; thus, the specific passage position of the detected material tray 13 in the material tray running channel 3 can be determined.

[0036] Furthermore, each unit has two detection components 5, one high and one low, which are a high point detection component and a low point detection component; the high point detection component of each unit is located on one side wall 1.1 of the heating furnace and is higher than the height of the roller 2 in the heating furnace 1, while the low point detection component is located on the other side wall 1.1 of the heating furnace 1 and is lower than the height of the roller 2 in the heating furnace 1.

[0037] Furthermore, the high point detection component and the low point detection component of each unit form a beam of light that is directed towards each other. The beam of light forms a 15° angle with the horizontal line at the height of the roller 2 in the heating furnace 1. With this design, the presence of the material tray 13 can be detected by the detection component 5 as long as the material tray 13 passes over the roller 2.

[0038] Furthermore, each unit's two detection components include a photoelectric switch 14 and a grating mechanism; the grating mechanism includes a grating tube 15, a grating tube base 16, and a manual valve 17; the grating tube 15 is connected to the side wall 1.1 of the heating furnace, the front end of the grating tube 15 is the injection inlet, and the bottom of the grating tube 15 near the injection inlet is connected through the grating tube base 16, and the photoelectric switch 14 is fixedly connected on the grating tube base 16. The photoelectric switch 14 corresponds to the injection inlet position of the grating tube 15, so that the light emitted by the photoelectric switch 14 passes through the grating tube 15 and enters the interior of the heating furnace 1;

[0039] Furthermore, borosilicate glass is fixed at the entrance position of the grating tube 15, and the borosilicate glass has the function of insulating heat.

[0040] The photoelectric switch 14 is connected to the electrical cabinet located in the heating furnace via a wire, and the photoelectric switch 14 transmits the signal to the PLC system.

[0041] The grating tube 15 is provided with a manual valve 17 on its upper part, which is used to replace the borosilicate glass.

[0042] Furthermore, the two photoelectric switches 14 of the two detection components 5 in each unit are a pair of laser through-beam photoelectric switches; one photoelectric switch is a transmitter and the other photoelectric switch is a receiver; after being powered on, the transmitter projects a beam of light onto the receiver, thereby forming through-beam light; when the material tray 13 passes between the two photoelectric switches, the output of the photoelectric switches is triggered; if the two photoelectric switches are not triggered, it means that no material tray 13 passes through this point.

[0043] It should be noted that in the detection components of each unit, the photoelectric switch at the high point is the transmitter and the photoelectric switch at the low point is the receiver; or the photoelectric switch at the high point is the receiver and the photoelectric switch at the low point is the transmitter.

[0044] In this embodiment, the laser through-beam photoelectric switch is model E3S-CT11-L or E3S-CT11-D, respectively.

[0045] It should be noted that the light emitted from the photoelectric switch 14 through the grating tube 15 reaches the interior of the heating furnace 1. The interface position of the grating tube 15 connected to the inner wall of the heating furnace needs to correspond to the area between two adjacent rollers 2 to prevent the emitted light from being blocked by the rollers 2 and affecting the detection.

[0046] In this scheme, the internal environment of the heating furnace 1 is kept clean during the heating process to prevent internal dust from interfering with the photoelectric switch detection. Several nitrogen pipelines 18 are respectively set on the two side walls of the heating furnace. Each nitrogen pipeline 18 is connected to the grating tube 15 in each detection component 5. All nitrogen pipelines 18 are connected to the nitrogen outlet pipe at the top 1.2 of the heating furnace. The nitrogen source enters from the top 1.2 of the heating furnace through the nitrogen inlet pipe and uses a temperature equalization fan to make the nitrogen flow from the nitrogen outlet pipe to each nitrogen pipeline 18, thereby providing nitrogen to the grating tube 15. The purpose is to blow away the dust or flue gas inside the heating furnace 1 to prevent interference with the photoelectric switch detection.

[0047] Based on the above detection of the material tray 13 in the material tray running channel 3, the running structure of the material tray 13 on the roller 2 needs to be individually controlled and reciprocated in each work station area until the set time is reached and then enters the next work station area, so as to ensure uniform heating of the product.

[0048] Each workstation area is equipped with a motor that synchronously controls each roller 2 in that workstation area. The material tray 13 moves in each workstation area as follows: when the material tray 13 moves to the photoelectric switch position at the end of the workstation area, the material tray 13 is detected, and the motor drives each roller 2 in that workstation area to move back; when the material tray 13 is driven back to the photoelectric switch at the beginning of the workstation area, the motor drives each roller 2 in that workstation area to move towards the next workstation area; this process is repeated, and the material tray 13 moves between the two photoelectric switches in the workstation area through the roller 2 until the set time is reached, and then synchronously moves to the next workstation area.

[0049] Taking a five-station area configuration as an example, the photoelectric switches on one side wall 1.1 of the heating furnace, from the front airlock chamber to the rear airlock chamber, are arranged in the following order: the first and second photoelectric switches in the front airlock chamber 6, the third and fourth photoelectric switches in the first station 8, the fifth and sixth photoelectric switches in the second station 9, the seventh and eighth photoelectric switches in the third station 10, the ninth and tenth photoelectric switches in the fourth station 11, the eleventh and twelfth photoelectric switches in the fifth station 11, and one photoelectric switch in the rear airlock chamber 7. It should be noted that since there is no need for movement in the rear airlock chamber 7, only one photoelectric switch is designed. The photoelectric switches on the other side wall 1.1 of the heating furnace correspond one-to-one with the first to twelfth photoelectric switches, and are referred to as the first set of photoelectric switches, the second set of photoelectric switches, and so on, up to the twelfth set of photoelectric switches.

[0050] When there is a material tray 13 at the first station 8, when the material tray 13 reaches the position of the fourth photoelectric switch and the fourth auxiliary photoelectric switch, the fourth photoelectric switch and the fourth auxiliary photoelectric switch detect the material tray 13, and the motor of the first station 8 drives the roller 2 of the station to move to the left; when the third photoelectric switch and the third auxiliary photoelectric switch of the first station 8 detect the material tray 13, the motor drives the roller 2 of the station to move to the right; this process is repeated, and the material tray 13 moves between the third photoelectric switch and the fourth photoelectric switch through the roller 2 until the set time is reached, and then moves synchronously to the right.

[0051] When there is a material tray 13 at the second station 9, the material tray 13 moves between the fifth and sixth photoelectric switches; when there is a material tray 13 at the third station 10, the material tray 13 moves between the seventh and eighth photoelectric switches, and so on, until it reaches the rear airlock chamber area 7, thereby ensuring the uniformity of heating of the material tray 13 in the entire heating furnace 1. The running position of the material tray 13 is accurately detected by the designed detection mechanism. The advantage is that the detection of the material tray 13 is accurate.

[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A control tray detection system for a heat treatment roller furnace, characterized in that, Includes: a heating furnace, wherein several rollers are horizontally and evenly laid from one end to the other in the heating furnace, and the area above the rollers forms a material tray running channel inside the heating furnace through the side wall and top of the heating furnace; one end of the heating furnace is the feeding end, and the material tray running channel corresponding to the feeding end is the loading area, and a furnace door is set on the material tray running channel near the loading area; Detection mechanisms are installed on the two side walls of the heating furnace located outside the material tray running channel. Each detection mechanism contains several detection components. The detection mechanisms are arranged in pairs on the two side walls of the heating furnace, with the pairs of detection components in each unit arranged in a high-low configuration on the two side walls of the heating furnace. The two detection components of each unit, one high and one low, are inclined to penetrate the side wall of the heating furnace, and the two detection components correspond to each other to form a facing relationship.

2. The control tray detection system for a heat treatment roller furnace according to claim 1, characterized in that: A front airlock chamber is located near the furnace door in the material tray running channel, and a rear airlock chamber is located at the end of the material tray running channel; several detection component units on both sides of the heating furnace are distributed regionally from the front airlock chamber to the rear airlock chamber.

3. The control tray detection system for a heat treatment roller furnace according to claim 2, characterized in that: Several detection component units are sequentially divided on the side wall of the heating furnace from the direction of the heating furnace feed end to the direction of the end end into a front airlock chamber position area, multiple work station areas and a rear airlock chamber position area.

4. The control tray detection system for a heat treatment roller furnace according to claim 3, characterized in that: The area between the first two detection component units on the side wall of the heating furnace in the direction of the feed end is the front airlock chamber area, and the last two detection component units at the end of the heating furnace belong to the rear airlock chamber area; each station area between the rear end of the front airlock chamber and the front end of the rear airlock chamber is composed of two detection component units.

5. The control tray detection system for a heat treatment roller furnace according to claim 4, characterized in that: The distance between the two detection component units at each station is the same, specifically the distance of 4-5 rollers in a heating furnace.

6. The control tray detection system for a heat treatment roller furnace according to claim 1, characterized in that: Each unit has two detection components, one high and one low, namely the high point detection component and the low point detection component. The high point detection component of each unit is located on one side wall of the heating furnace and is higher than the height of the roller in the heating furnace, while the low point detection component is located on the other side wall of the heating furnace and is lower than the height of the roller in the heating furnace.

7. The control tray detection system for a heat treatment roller furnace according to claim 6, characterized in that: The high-point detection component and the low-point detection component of each unit form a beam of light that is directed towards each other, and the beam of light forms a 15° angle with the horizontal line at the height of the roller in the heating furnace.

8. The control tray detection system for a heat treatment roller furnace according to claim 7, characterized in that: Each unit has two detection components, including a photoelectric switch and a grating mechanism. The grating mechanism includes a grating tube, a grating tube base, and a manual valve. The grating tube is connected to the side wall of the heating furnace. The front end of the grating tube is the injection inlet. The bottom of the grating tube near the injection inlet is connected through the grating tube base. The photoelectric switch is fixedly connected to the grating tube base. The photoelectric switch corresponds to the injection inlet position of the grating tube, so that the light emitted by the photoelectric switch passes through the grating tube and enters the interior of the heating furnace.

9. The control tray detection system for a heat treatment roller furnace according to claim 8, characterized in that: The two photoelectric switches of the two detection components in each unit form a pair of laser through-beam photoelectric switches.

10. The control tray detection system for a heat treatment roller furnace according to claim 8, characterized in that: Several nitrogen pipelines are installed on both sides of the heating furnace. Each nitrogen pipeline is connected to the grating tube in each detection component. All nitrogen pipelines converge and connect to the nitrogen outlet pipe at the top of the heating furnace. The nitrogen source enters from the top of the heating furnace through the nitrogen inlet pipe and is made to flow from the nitrogen outlet pipe into each nitrogen pipeline by a temperature equalization fan.

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