Tray transfer method

Abstract

The patent provides a tray transfer method which can conveniently and quickly pull out the tray from any one of the two heat treatment furnaces and send it into the other heat treatment furnace, and the steps are as follows: the front end rail mechanism is turned to the horizontal state; the front end push-pull hook is inserted into the front end annealing furnace from below the tray; the front end push-pull hook is erected and inserted into the push-pull groove on the tray; the small trolley moves longitudinally backward relative to the large trolley, pulls out the tray from the front end annealing furnace to the tray guide rail; the front end push-pull hook is pulled out of the push-pull groove; the small trolley passes below the tray, and when the rear end push-pull hook is flush with the push-pull groove on the tray, the rear end push-pull hook is erected under the drive of the rear end push-pull hook mechanism and is inserted into the push-pull groove; the rear end rail is turned to the horizontal state; the small trolley moves backward relative to the large trolley, pushes the tray from the tray guide rail through the rear end rail to the rear tray rail, and the tray enters the rear end annealing furnace.

Description

Technical Field

[0001] This patent relates to a method for transferring a tray between two opposing heat treatment furnaces. Background Technology

[0002] CN2020220624348 discloses a bidirectional material loading and unloading mechanism for a material cart, including a large material cart traveling mechanism, a material cart tilting and bridging mechanism, and a bidirectional pull-plate trolley. The large material cart traveling mechanism includes a frame, a traveling drive mechanism, a material cart loading and unloading guide rail, and a transmission drive mechanism for driving the bidirectional pull-plate trolley to slide on the material cart loading and unloading guide rail. The material cart tilting and bridging mechanism includes an electric push rod and a bridging mechanism. The electric push rod is rotatably connected to the bridging mechanism, and the bridging mechanism is rotatably connected to the end of the frame. The bidirectional pull-plate trolley includes a transmission frame, an electro-hydraulic push rod mounting frame, an electro-hydraulic push rod, and a material cart connecting frame. The bottom of the transmission frame is slidably connected to the material cart loading and unloading guide rail. Two electro-hydraulic push rods are rotatably connected to the transmission frame through the electro-hydraulic push rod mounting frame. Each electro-hydraulic push rod is rotatably connected to the material cart connecting frame through a push rod connector. The two material cart connecting frames are rotatably connected to both ends of the transmission frame, respectively. Because the bidirectional pulling trolley rolls on the material car in / out guide rails, and the material tray (used to carry the material) pushed and pulled by the bidirectional pulling trolley also rolls on the material car in / out guide rails, the bidirectional pulling trolley can only be located at one end of the material tray (e.g., the front end). The bidirectional pulling trolley cannot move across the material tray to the other end (e.g., the rear end). This means that the bidirectional pulling trolley can only deliver the material tray into a specific annealing furnace, and this specific annealing furnace and the bidirectional pulling trolley must be located at opposite ends of the material tray. For example, when the trolley is located at the front end of the material tray, it can only deliver the material tray into the annealing furnace located at the rear end of the material tray, and cannot deliver the material tray into the annealing furnace located at the front end of the material tray.

[0003] However, annealing furnaces are often arranged longitudinally, one in front of the other. This means that the feeding and discharging mechanism of the bidirectional material car between the two annealing furnaces can only pull the material tray out of or into the front annealing furnace, or only pull the material tray out of or into the rear annealing furnace. It cannot transfer the material tray from the front annealing furnace to the rear annealing furnace, nor can it transfer the material tray from the rear annealing furnace to the front annealing furnace. In other words, it cannot realize the transfer of the material tray between the two annealing furnaces. Summary of the Invention

[0004] This patent provides a method for transferring a material tray, which can conveniently and quickly pull the material tray out of either of two longitudinally opposite heat treatment furnaces and send the material tray into the other heat treatment furnace.

[0005] To achieve the above technical objectives, the technical solution adopted in this patent is as follows:

[0006] The material transfer method employs a bidirectional feeding and discharging mechanism for the heat treatment furnace, primarily composed of a large material car, a rail-connecting mechanism, and a small material car. The large material car has longitudinally extending, parallel material tray guide rails and small material car guide rails. The small material car is rolled or slidably mounted on the small material car guide rails. A small material car drive mechanism is installed on the large material car to drive the small material car along the small material car guide rails. Rail-connecting mechanisms, including rails, are installed at both the longitudinal front and rear ends of the large material car.

[0007] The small material cart is equipped with push-pull hook mechanisms, including push-pull hooks, at both the front and rear ends in the longitudinal direction. When the push-pull hooks are in a horizontal state under the drive of the push-pull hook mechanisms, neither the small material cart nor the push-pull hook mechanisms are higher than the bottom surface of the material tray.

[0008] The step of feeding the material tray from the front-end heat treatment furnace into the rear-end heat treatment furnace, which is longitudinally opposite to it:

[0009] The movement of the rail-mounting mechanism at the front of the large material car causes the front rail in the front rail-mounting mechanism to flip to a horizontal state. The material tray track in the front annealing furnace, namely the front material tray track, the front rail, and the material tray guide rail, are connected in sequence to form a continuous straight track for the material tray to move.

[0010] Driven by the small material trolley drive mechanism, the small material trolley moves forward longitudinally along the small material trolley guide rail relative to the large material trolley to the front end of the large material trolley. The front push-pull hook extends forward beyond the front end of the large material trolley and passes under the material tray located on the front material tray track to enter the front annealing furnace and reach the bottom of the material tray push-pull groove.

[0011] The front push-pull hook is erected under the drive of the front push-pull hook mechanism, and the upper end of the front push-pull hook extends into the push-pull groove on the material tray;

[0012] Driven by the small material trolley drive mechanism, the small material trolley moves backward longitudinally relative to the large material trolley along the small material trolley guide rail. The front push-pull hook pulls the material tray backward along the front straight track, pulling the material tray out of the front annealing furnace and moving the material tray onto the material tray guide rail.

[0013] The front push-pull hook is in a horizontal state under the action of the front push-pull hook mechanism, and the front push-pull hook disengages from the push-pull groove;

[0014] Driven by the small material trolley drive mechanism, the small material trolley moves longitudinally forward along the small material trolley guide rail. The small material trolley passes under the material tray until the rear push-pull hook on the small material trolley is flush with the push-pull groove on the material tray, at which point the small material trolley stops moving.

[0015] The rear push-pull hook is erected under the drive of the rear push-pull hook mechanism, and the upper end of the rear push-pull hook extends into the push-pull groove on the material tray.

[0016] The movement of the rail-mounting mechanism at the rear of the large material car causes the rear rail in the rear rail-mounting mechanism to flip to a horizontal state. The material tray track in the rear annealing furnace, namely the rear material tray track, the rear rail, and the material tray guide rail, are connected in sequence to form a continuous rear straight track for the material tray to move.

[0017] Driven by the small material trolley drive mechanism, the small material trolley moves longitudinally backward along the small material trolley guide rail relative to the large material trolley. The rear push-pull hook pushes the material tray backward along the rear straight track, pushing the material tray from the material tray guide rail through the rear connecting rail to the rear material tray track, and the material tray enters the rear annealing furnace.

[0018] The rear push-pull hook is in a horizontal state under the action of the rear push-pull hook mechanism, and the rear push-pull hook disengages from the push-pull groove;

[0019] Driven by the small material trolley drive mechanism, the small material trolley moves longitudinally forward along the small material trolley guide rail, and the rear push-pull hook moves forward from below the material tray, leaving the rear annealing furnace.

[0020] This patent also provides another tray transfer method belonging to the same inventive concept as the above-mentioned tray transfer method, which can conveniently and quickly pull the tray out from either of two longitudinally opposite heat treatment furnaces and send the tray into the other heat treatment furnace.

[0021] This alternative material tray transfer method employs a bidirectional feeding and discharging mechanism for the heat treatment furnace, mainly composed of a large material cart, a rail-connecting mechanism, and a small material cart. The large material cart has longitudinally extending, parallel material tray guide rails and a small material cart guide rail. The small material cart is rolled or slidably mounted on the small material cart guide rail. A small material cart drive mechanism is installed on the large material cart to drive the small material cart to move along the small material cart guide rail. Rail-connecting mechanisms, including rail-connecting mechanisms, are installed at both the longitudinal front and rear ends of the large material cart.

[0022] The front and rear ends of the material tray are equipped with push-pull grooves, which are the front push-pull groove and the rear push-pull groove, respectively.

[0023] The small material cart is equipped with push-pull hook mechanisms, including push-pull hooks, at both the front and rear ends in the longitudinal direction. When the push-pull hooks are in a horizontal state under the drive of the push-pull hook mechanisms, neither the small material cart nor the push-pull hook mechanisms are higher than the bottom surface of the material tray.

[0024] The step of feeding the material tray from the front-end heat treatment furnace into the rear-end heat treatment furnace, which is longitudinally opposite to it:

[0025] The movement of the rail-mounting mechanism at the front of the large material car causes the front rail in the front rail-mounting mechanism to flip to a horizontal state. The material tray track in the front annealing furnace, namely the front material tray track, the front rail, and the material tray guide rail, are connected in sequence to form a continuous straight track for the material tray to move.

[0026] Driven by the small material trolley drive mechanism, the small material trolley moves forward longitudinally along the small material trolley guide rail relative to the large material trolley to the front end of the large material trolley. The front push-pull hook extends forward beyond the front end of the large material trolley and passes under the material tray located on the front material tray track to enter the front annealing furnace and reach the lower part of the rear push-pull groove on the material tray.

[0027] The front push-pull hook is erected under the drive of the front push-pull hook mechanism, and the upper end of the front push-pull hook extends into the rear push-pull groove on the material tray.

[0028] Driven by the small material trolley drive mechanism, the small material trolley moves backward longitudinally relative to the large material trolley along the small material trolley guide rail. The front push-pull hook pulls the material tray backward along the front straight track, pulling the material tray out of the front annealing furnace and moving the material tray onto the material tray guide rail.

[0029] The front push-pull hook is in a horizontal state under the action of the front push-pull hook mechanism, and the front push-pull hook disengages from the rear push-pull groove;

[0030] Driven by the small material trolley drive mechanism, the small material trolley moves longitudinally forward along the small material trolley guide rail. The small material trolley passes under the material tray until the rear push-pull hook on the small material trolley is flush with the front push-pull groove on the material tray, at which point the small material trolley stops moving.

[0031] The rear push-pull hook is erected under the drive of the rear push-pull hook mechanism, and the upper end of the rear push-pull hook extends into the front push-pull groove on the material tray.

[0032] The movement of the rail-mounting mechanism at the rear of the large material car causes the rear rail in the rear rail-mounting mechanism to flip to a horizontal state. The material tray track in the rear annealing furnace, namely the rear material tray track, the rear rail, and the material tray guide rail, are connected in sequence to form a continuous rear straight track for the material tray to move.

[0033] Driven by the small material trolley drive mechanism, the small material trolley moves longitudinally backward along the small material trolley guide rail relative to the large material trolley. The rear push-pull hook pushes the material tray backward along the rear straight track, pushing the material tray from the material tray guide rail through the rear connecting rail to the rear material tray track, and the material tray enters the rear annealing furnace.

[0034] The rear push-pull hook is in a horizontal state under the action of the rear push-pull hook mechanism, and the rear push-pull hook disengages from the front push-pull groove;

[0035] Driven by the small material trolley drive mechanism, the small material trolley moves longitudinally forward along the small material trolley guide rail, and the rear push-pull hook moves forward from below the material tray, leaving the rear annealing furnace.

[0036] In the above-mentioned material tray transfer method, the furnace door of the heat treatment furnace is in the open state before the rail-mounting mechanism drives the rail to flip to a horizontal state.

[0037] In the aforementioned tray transfer method, the push-pull hook swings in a transverse plane perpendicular to the longitudinal direction, remaining in either a horizontal or vertical position. In the longitudinal direction, the width of the push-pull groove is equal to the width of the push-pull hook.

[0038] The above-described material tray transfer method allows the large material cart to move in a lateral direction perpendicular to the longitudinal direction relative to the ground.

[0039] The above-mentioned material tray transfer method includes a small material cart drive mechanism comprising a drive sprocket shaft and a driven sprocket shaft at both ends of the large material cart, a drive sprocket and a driven sprocket mounted on the drive sprocket shaft and the driven sprocket shaft, a drive chain surrounding the drive sprocket and the driven sprocket, the drive chain being connected to the lower part of the small material cart, and the drive sprocket shaft being connected to the small material cart drive motor and reduction mechanism that drive it to rotate.

[0040] In the above-mentioned material tray transfer method, there are two material tray guide rails and two small material cart guide rails, with the two small material cart guide rails located between the two material tray guide rails.

[0041] The aforementioned tray transfer method utilizes a bidirectional feeding and discharging mechanism for the heat treatment furnace, comprising a large tray, a rail-connecting mechanism, and a small tray. The large tray has longitudinally extending, parallel tray guide rails and a small tray guide rail. The small tray is rolled or slidably mounted on the small tray guide rail. A small tray drive mechanism is mounted on the large tray to drive the small tray along the small tray guide rail. Both the front and rear longitudinal ends of the large tray are equipped with rail-connecting mechanisms, including rails. When the rail-connecting mechanism rotates the rails to a horizontal position, the tray guide rails connect with the tray tracks inside the heat treatment furnace via the rails. The tray can move from the tray guide rails to the tray tracks via the rails, or vice versa.

[0042] The small material cart is equipped with push-pull hook mechanisms, including push-pull hooks, at both the front and rear ends. When the push-pull hooks are in a horizontal state under the action of the push-pull hook mechanism, neither the small material cart nor the push-pull hook mechanism is higher than the bottom surface of the material tray, and the small material cart and the push-pull hook mechanism can pass under the material tray. When the push-pull hooks are in a vertical state under the action of the push-pull hook mechanism, the upper end of the push-pull hook can extend into the push-pull groove on the material tray, and the push-pull hook can drive the material tray to move.

[0043] When the small material cart moves longitudinally relative to the large material cart to the front end of the large material cart, the push-pull hook at the front end extends forward beyond the front end of the large material cart and passes under the material tray on the tray track opposite to the front end of the large material cart, reaching the bottom of the material tray push-pull groove; when the small material cart moves longitudinally relative to the large material cart to the rear end of the large material cart, the push-pull hook at the rear end extends backward beyond the rear end of the large material cart and passes under the material tray on the tray track opposite to the rear end of the large material cart, reaching the bottom of the material tray push-pull groove.

[0044] The push-pull hook mechanism includes a push-pull hook shaft rotatably mounted on a small material cart. The lower end of the push-pull hook is fixedly connected to one end of the push-pull hook shaft, and the other end of the push-pull hook shaft is connected to a push-pull hook drive device that drives it to swing.

[0045] The rail-laying mechanism includes a rail-laying shaft rotatably mounted on a large material cart, the lower end of the rail is fixedly connected to the rail-laying shaft, and the rail-laying shaft is connected to a rail-laying drive device that drives the rail to swing.

[0046] The bottom of the large material cart is equipped with wheels that move laterally relative to the ground in a direction perpendicular to the longitudinal direction. The wheels are connected to the large material cart drive device, which is mounted on the large material cart and drives it to rotate.

[0047] There are two rail-connecting mechanisms at one longitudinal end of the large material car. When each rail-connecting mechanism drives the rail to rotate to a horizontal state, a material tray guide rail connects with a material tray track inside the heat treatment furnace through a rail.

[0048] There are two push-pull hook mechanisms at one end of the material cart, located on the left and right sides of one end of the material cart.

[0049] The beneficial effects of this patent are:

[0050] Taking an example where there is an annealing furnace at both the front and rear ends of the feeding and discharging mechanism, the material tray containing the annealing material needs to be pulled out of the front annealing furnace and fed into the rear annealing furnace. The working process is as follows:

[0051] The front annealing furnace door opens. The rail-mounting mechanism at the front of the large material cart moves, causing the front rail to flip to a horizontal position. The material tray track (i.e., the front material tray track), the front rail, and the material tray guide rail inside the front annealing furnace are connected in sequence to form a continuous straight track for the material tray to move (roll or slide).

[0052] See Figure 2 , 14 Driven by the small material trolley drive mechanism, the small material trolley moves forward longitudinally along the small material trolley guide rail relative to the large material trolley to the front end of the large material trolley. The front push-pull hook extends forward beyond the front end of the large material trolley and passes under the material tray located on the front material tray track to reach the bottom of the material tray push-pull groove.

[0053] The front push-pull hook is erected under the drive of the front push-pull hook mechanism, and the upper end of the front push-pull hook extends into the push-pull groove on the bottom surface of the material tray.

[0054] See Figure 4 , 15Driven by the small material trolley drive mechanism, the small material trolley moves longitudinally backward relative to the large material trolley along the small material trolley guide rail. The front push-pull hook pulls the material tray backward along the front straight track, pulling the material tray out of the front annealing furnace and onto the material tray guide rail. At this time, as needed, the front rail-mounting mechanism of the large material trolley can be activated, causing the front rail to flip to a vertical position and closing the front annealing furnace door.

[0055] The front push-pull hook is in a horizontal state under the action of the front push-pull hook mechanism, and the front push-pull hook is disengaged from the push-pull groove.

[0056] Driven by the small material trolley drive mechanism, the small material trolley moves longitudinally forward along the small material trolley guide rail. The small material trolley passes under the material tray until the rear push-pull hook on the small material trolley is flush with the push-pull groove on the material tray, at which point the small material trolley stops moving.

[0057] See Figure 1 , 13 The rear push-pull hook is erected under the drive of the rear push-pull hook mechanism, and the upper end of the rear push-pull hook extends into the push-pull groove on the bottom surface of the material tray.

[0058] The rear annealing furnace door opens. The track-laying mechanism at the rear of the large material cart moves, causing the rear track to flip to a horizontal position. The material tray track (i.e., the rear material tray track), the rear track, and the material tray guide rail inside the rear annealing furnace are connected in sequence to form a continuous straight track for the material tray to move (roll or slide).

[0059] Driven by the small material trolley drive mechanism, the small material trolley moves longitudinally backward relative to the large material trolley along the small material trolley guide rail. The rear push-pull hook pushes the material tray backward along the rear straight track, pushing the material tray from the material tray guide rail through the rear end rail onto the rear material tray track, and the material tray enters the rear annealing furnace.

[0060] The rear push-pull hook is in a horizontal position under the action of the rear push-pull hook mechanism, and the rear push-pull hook disengages from the push-pull groove.

[0061] Driven by the small material trolley drive mechanism, the small material trolley moves longitudinally forward along the small material trolley guide rail, and the rear push-pull hook gradually moves forward from below the material tray and away from the furnace door of the rear annealing furnace.

[0062] The movement of the track-laying mechanism at the rear of the large material car causes the track at the rear to flip to a vertical position, and then the furnace door of the rear annealing furnace is closed.

[0063] Therefore, it can be seen that the push-pull hook of this invention can push and pull the material tray when vertical, and detach from the material tray and be lower than the material tray when horizontal, allowing the small material cart to pass under the material tray, thus connecting the front or rear push-pull hook on the small material cart to the material tray. Specifically,

[0064] When the tray needs to be pulled backward from the front annealing furnace, the front hook extends forward and connects to the tray; when the tray needs to be pulled forward from the rear annealing furnace, the rear hook extends backward and connects to the tray.

[0065] When the tray needs to be pushed from the tray guide rail into the front annealing furnace, the front hook extends forward and connects to the tray; when the tray needs to be pushed from the tray guide rail into the rear annealing furnace, the rear hook extends backward and connects to the tray.

[0066] When transferring a material tray from the front annealing furnace to the rear annealing furnace, first extend the front hook forward to connect with the tray inside the front annealing furnace, pull the tray backward onto the tray guide rail, then flip the front hook to a horizontal position, and the small trolley passes under the tray (moving from the rear to the front of the tray). The rear hook then connects to the tray, and the small trolley pushes the tray backward onto the tray guide rail into the rear annealing furnace. Conversely, when transferring a material tray from the rear annealing furnace to the front annealing furnace, first extend the rear hook backward to connect with the tray inside the rear annealing furnace, pull the tray forward onto the tray guide rail, then flip the rear hook to a horizontal position, and the small trolley passes under the tray (moving from the front to the rear of the tray). The front hook then connects to the tray, and the small trolley pushes the tray forward onto the tray guide rail into the front annealing furnace.

[0067] This allows for the smooth and quick transfer of materials between two longitudinally opposite heat treatment furnaces.

[0068] In this patent, the track-connecting mechanism, the small material cart drive mechanism, and the large material cart drive device are existing technologies. Attached Figure Description

[0069] Figure 1 This is a front view of the bidirectional feeding and discharging mechanism of the heat treatment furnace (when the rear push-pull hook extends into the push-pull groove at the front end of the material tray assembly).

[0070] Figure 2 This is a schematic diagram showing the front push-pull hook extending into the front annealing furnace and connecting with the material tray.

[0071] Figure 3 This is a front view of the bidirectional feeding and discharging mechanism of the heat treatment furnace (excluding the small material cart).

[0072] Figure 4 This is a front view of the bidirectional feeding and discharging mechanism of the heat treatment furnace (excluding the small material cart) (when the front push-pull hook extends into the push-pull groove at the rear end of the material tray assembly).

[0073] Figure 5 This is a top view of the material cart, track-laying mechanism, etc.

[0074] Figure 6This is a top view of the large material cart, the rail-connecting mechanism, the small material cart, the push-pull hook mechanism, etc.

[0075] Figure 7 This is a side view of the bidirectional feeding and discharging mechanism of the heat treatment furnace (with the drive chain, connecting ends, etc. removed).

[0076] Figure 8 This is a side view of the bidirectional feeding and discharging mechanism of the heat treatment furnace (excluding the drive chain, push-pull hook mechanism, etc.).

[0077] Figure 9 This is a schematic diagram of a track-laying mechanism, etc.

[0078] Figure 10 This is a top view of the small material cart and push-pull hook mechanism.

[0079] Figure 11 This is the front view of the material tray.

[0080] Figure 12 This is a top view of the material tray.

[0081] Figure 13 for Figure 1 Enlarged view of small and medium-sized material carts, push-pull hook mechanisms, etc.

[0082] Figure 14 for Figure 2 Enlarged view of small and medium-sized material carts, push-pull hook mechanisms, etc.

[0083] Figure 15 for Figure 4 Enlarged view of small and medium material carts, push-pull hook mechanism, two material trays, etc.

[0084] In the attached diagram: 1. Large material cart; 11. Large material cart body; 12. Walking wheels; 13. Small material cart guide rail; 14. Large material cart drive motor and reduction mechanism; 15. Material tray guide rail.

[0085] The track-mounting mechanism 2, track 20, front track 21, rear track 22, track-mounting drive motor 23, and track-mounting shaft 24.

[0086] Small material cart 3, small material cart body 31, small material cart rollers 33, connecting end 34.

[0087] Push-pull hook mechanism 4, push-pull hook 40, front push-pull hook 41, rear push-pull hook 42, push-pull hook rotating shaft 43, push-pull hook motor and reduction transmission mechanism 44.

[0088] Material tray 5, front push-pull groove 51, rear push-pull groove 52, crossbeam 54, material tray roller 55, hanging lug 56. Small material cart drive mechanism 6, drive sprocket shaft 61, driven sprocket shaft 62, drive sprocket 63, driven sprocket 64, drive chain 65, pin shaft 66, small material cart drive motor and reduction mechanism 67. Heat treatment furnace 7, material tray track 70, front material tray track 71, rear material tray track 72. Detailed Implementation

[0089] The specific embodiments of this patent will be further described below with reference to the accompanying drawings:

[0090] like Figure 1 The bidirectional feeding and discharging mechanism of the heat treatment furnace shown mainly includes a large material car 1, a rail-mounting mechanism 2, a small material car 3, and a small push-pull hook mechanism 4.

[0091] The main body 11 of the large material cart 1 is welded from steel plates. There are three wheels 12 on each of the left and right sides of the bottom that move laterally relative to the ground. The three wheels on one side are drive wheels and are connected to the large material cart drive device - large material cart drive motor and reduction mechanism 14 set on the large material cart to drive its rotation.

[0092] The main body 11 of the large material cart has two longitudinally extending, parallel material tray guide rails 15 and two small material cart guide rails 13. The small material cart guide rails 13 are located on the material tray guide rails 15, and the two small material cart guide rails are located between the two material tray guide rails.

[0093] The four small material cart rollers 33 at the bottom of the small material cart 3 are rolled on the small material cart guide rail 13.

[0094] The small material cart drive mechanism 6, which drives the small material cart to roll along the small material cart guide rail, includes a drive sprocket shaft 61 and a driven sprocket shaft 62 located at both ends of the large material cart, two drive sprockets 63 and two driven sprockets 64 located on the drive sprocket shaft and the driven sprocket shaft, and two drive chains 65 surrounding the drive sprockets and the driven sprockets. The two drive chains 65 are connected to the connecting end 34 fixed at the lower part of the small material cart body through a pin 66. The drive sprocket shaft 61 is connected to the small material cart drive motor and reduction mechanism 67 located on the large material cart body, which drives its rotation.

[0095] The tray 5 is mainly welded from crossbeams and longitudinal beams, with tray rollers 55 rolling on the tray guide rail 15 at the bottom. Two laterally extending crossbeams 54 are provided at each of the front and rear ends of the tray. A front push-pull groove 51 is formed between the two front crossbeams 54, and a rear push-pull groove 52 is formed between the two rear crossbeams. In the longitudinal direction, the widths of the front push-pull groove 51, the rear push-pull groove 52, the front push-pull hook 41, and the rear push-pull hook 42 are all equal. Each end of the tray has rotating lugs 56 and hanging rods on both sides. The front and rear ends of adjacent trays can be connected by the lugs and hanging rods to form a tray assembly.

[0096] The large material cart is equipped with a rail-mounting mechanism 2, including a rail 20, at both its longitudinal front and rear ends. Each end has two identical rail-mounting mechanisms, one on the left and one on the right. The rail-mounting mechanism 2 includes a rail-mounting shaft 24 rotatably mounted on the main body of the large material cart. The lower end of the rail 20 is fixedly connected to the rail-mounting shaft 24, and the rail-mounting shaft is connected to a rail-mounting drive motor 23 that drives its swing. The rail-mounting drive motor 23 is mounted on the main body 11 of the large material cart. When the rail-mounting mechanism 2 rotates the rail 20 to a horizontal position, the material tray guide rail 15 connects to the material tray track 70 inside the heat treatment furnace 7 via the rail 20. The material tray 5 can move from the material tray guide rail 15 to the material tray track 70 via the rail 20, or vice versa. When each rail-mounting mechanism rotates the rail to a horizontal position, one material tray guide rail connects to one material tray track inside the heat treatment furnace via one rail.

[0097] The main body 31 of the small material cart 3 is welded together from longitudinal beams, cross beams, etc. There are four small material cart rollers 33 on the left and right sides of the bottom of the small material cart body. The small material cart rollers 33 are rolled on the small material cart guide rail 13.

[0098] Push-pull hook mechanisms 4 are installed at both the front and rear ends of the small material cart, with two push-pull hook mechanisms on each end, one on the left and one on the right. Each push-pull hook mechanism 4 includes a push-pull hook shaft 43 rotatably mounted on the small material cart. The lower end of the push-pull hook 40 is fixedly connected to one end of the push-pull hook shaft, and the other end of the push-pull hook shaft is connected to a push-pull hook drive device—a push-pull hook motor and reduction transmission mechanism (such as a push-pull hook motor and worm gear mechanism) 44—that drives the hook's swing. The push-pull hook motor and reduction transmission mechanism 44 are mounted on the main body 31 of the small material cart. Driven by the push-pull hook mechanisms, the push-pull hook 40 swings in the transverse plane, remaining in either a horizontal or vertical position.

[0099] When the push-pull hook 40 is in a horizontal state under the drive of the push-pull hook mechanism 4, neither the small material cart nor the push-pull hook mechanism is higher than the bottom surface of the material tray, and the small material cart 3 and the push-pull hook mechanism 4 can pass through from under the material tray; when the push-pull hook 40 is in a vertical state under the drive of the push-pull hook mechanism, the upper end of the push-pull hook 40 extends into the push-pull groove (front push-pull groove 51 or rear push-pull groove 52) on the bottom surface of the material tray, and the push-pull hook can drive the material tray to move.

[0100] For ease of explanation, we refer to the push-pull hook mechanism at the front end of the small material cart as the front push-pull hook mechanism, and the push-pull hook mechanism at the rear end of the small material cart as the rear push-pull hook mechanism. The push-pull hook in the front push-pull hook mechanism is the front push-pull hook 41, and the push-pull hook in the rear push-pull hook mechanism is the rear push-pull hook 42.

[0101] The rail-connecting mechanism at the front end of the large material cart is called the front rail-connecting mechanism, and the rail-connecting mechanism at the rear end of the large material cart is called the rear rail-connecting mechanism. The rail in the front rail-connecting mechanism is the front rail 21, and the rail in the rear rail-connecting mechanism is the rear rail 22.

[0102] The two heat treatment furnaces are positioned opposite each other. The furnace at the front is called the front heat treatment furnace, and the furnace at the rear is called the rear heat treatment furnace. The material tray track in the front heat treatment furnace is called the front material tray track 71, and the material tray track in the rear heat treatment furnace is called the rear material tray track 72.

[0103] The process of pulling out the material tray 5 containing the material from the rear annealing furnace and feeding it into the front annealing furnace is as follows:

[0104] The large material car drive motor and reduction mechanism 14 work to drive the large material car 1 (including the small material car 3 on its upper part) to move laterally between the front heat treatment furnace and the rear heat treatment furnace.

[0105] The furnace door of the rear annealing furnace is opened. The rear rail mechanism of the large material car is activated, causing the rear rail 22 to flip to a horizontal state. The rear material tray track 72, the rear rail 22, and the material tray guide rail 15 inside the rear annealing furnace are connected in sequence to form a continuous, straight rear track for the material tray to roll.

[0106] The small material cart drive motor and reduction mechanism 67 are activated, driving the small material cart 3 (including the push-pull hook mechanism 4 on it) to move longitudinally backward along the small material cart guide rail 13 relative to the rear end of the large material cart. The rear push-pull hook 42 extends backward beyond the rear end of the large material cart and passes under the material tray 5 located on the rear material tray track 72, reaching the bottom of the front push-pull groove 51 of the material tray 5.

[0107] When the push-pull hook motor and reduction transmission mechanism 44 in the rear push-pull hook mechanism are activated, the rear push-pull hook 42 is driven to stand up from the horizontal state, and the upper end of the rear push-pull hook 42 extends into the front push-pull groove 51 on the bottom surface of the material tray.

[0108] See Figure 1 , 13 Driven by the small material trolley drive mechanism, the small material trolley 3 moves forward longitudinally relative to the large material trolley along the small material trolley guide rail 13. The rear push-pull hook 42 pulls the material tray 5 forward along the rear straight track, pulling the tray 5 out of the rear annealing furnace and onto the tray guide rail 15. The rear rail-mounting mechanism of the large material trolley can then be activated as needed. If necessary, the rear rail-mounting mechanism activates, causing the rear rail-mounting 22 to flip from a horizontal to a vertical position, and then the rear annealing furnace door is closed.

[0109] Driven by the rear push-pull hook mechanism, the rear push-pull hook 42 flips from a vertical state to a horizontal state, and the rear push-pull hook 42 disengages from the front push-pull groove 51.

[0110] The small material cart 3 (including the push-pull hook mechanism 4 on it) moves longitudinally backward along the small material cart guide rail under the drive of the small material cart drive mechanism. The small material cart (including the push-pull hook mechanism 4 on it) passes under the material tray 5 until the front push-pull hook 41 on the small material cart is flush with the rear push-pull groove 52 on the material tray, at which point the small material cart stops moving.

[0111] See Figure 4 , 15 Driven by the front push-pull hook mechanism, the front push-pull hook 41 is raised from a horizontal position and the upper end of the front push-pull hook 41 extends into the rear push-pull groove 52 on the bottom surface of the material tray 5.

[0112] The front annealing furnace door opens. The rail-mounting mechanism at the front of the large material car moves, causing the front rail 21 to flip to a horizontal position. The front material tray track 71, the front rail 21, and the material tray guide rail 15 inside the front annealing furnace are connected in sequence to form a continuous, straight front track for the material tray to roll.

[0113] See Figure 2 , 14 Driven by the small material trolley drive mechanism, the small material trolley 3 moves forward longitudinally relative to the large material trolley along the small material trolley guide rail 13. The front push-pull hook 41 extends forward beyond the front of the large material trolley. At the same time, the front push-pull hook 41 pushes the material tray 5 forward along the front straight track, pushing the material tray from the material tray guide rail 15 through the front connecting rail 21 onto the front material tray track 71. The material tray 5 then enters the front annealing furnace.

[0114] Driven by the front push-pull hook mechanism, the front push-pull hook 41 flips from a vertical state to a horizontal state and disengages from the rear push-pull groove 52.

[0115] The small material cart 3 (including the push-pull hook mechanism 4 on it) moves longitudinally backward along the small material cart guide rail under the drive of the small material cart drive mechanism. The front push-pull hook 41 gradually moves backward from below the material tray and away from the furnace door of the front annealing furnace.

[0116] The movement of the rail-mounting mechanism at the front of the large material car causes the front rail 21 to flip from a horizontal state to a vertical state, and then the front annealing furnace door is closed.

[0117] This patent describes the push-pull operation using a single tray 5 as an example. Obviously, this patent also applies to tray assemblies composed of multiple trays. In this case, simply engage the front or rear push-pull hook with the push-pull groove at the front or rear end of the tray assembly (see [link]). Figure 1 , 3 (as shown in Figure 4).

Claims

1. A method of transferring a tray, characterized by: The two-way feeding and discharging mechanism of the heat treatment furnace is mainly composed of a large trolley, a rail connecting mechanism and a small trolley, the large trolley is provided with longitudinally forward and backward extending and mutually parallel trolley guide rails and small trolley guide rails, the small trolley is rolling or slidingly arranged on the small trolley guide rails, and the small trolley driving mechanism is arranged on the large trolley to drive the small trolley to move along the small trolley guide rails; The rail connecting mechanism is arranged at the longitudinal front and back ends of the large trolley and includes a rail connecting mechanism at the front end of the large trolley and a rail connecting mechanism at the back end of the large trolley; The step of feeding the trolley in the front heat treatment furnace into the rear heat treatment furnace longitudinally opposite to the front heat treatment furnace is as follows: The rail connecting mechanism at the front end of the large trolley is actuated, so that the front rail in the front rail connecting mechanism is turned to a horizontal state, and the trolley track in the front heat treatment furnace, i.e., the front trolley track, the front rail and the trolley guide rails are sequentially connected to form a continuous front straight track for the trolley to move; The small trolley is driven by the small trolley driving mechanism to move forward along the small trolley guide rails relative to the large trolley longitudinally to the front end of the large trolley, the front pulling hook protrudes forward beyond the front end of the large trolley and extends into the front heat treatment furnace from below the trolley on the front trolley track; The front pulling hook is vertically erected by the front pulling hook mechanism, and the upper end of the front pulling hook extends into the pulling slot on the trolley; The small trolley is driven by the small trolley driving mechanism to move backward along the small trolley guide rails relative to the large trolley longitudinally, the front pulling hook pulls the trolley to move backward along the front straight track, and the trolley is pulled out of the front heat treatment furnace, and the trolley moves to the trolley guide rails; The front pulling hook is in a horizontal state by the front pulling hook mechanism, and the front pulling hook is pulled out of the pulling slot; The small trolley is driven by the small trolley driving mechanism to move forward along the small trolley guide rails longitudinally, and the small trolley passes below the trolley until the rear pulling hook on the small trolley is flush with the pulling slot on the trolley, and the small trolley stops moving; The rear pulling hook is vertically erected by the rear pulling hook mechanism, and the upper end of the rear pulling hook extends into the pulling slot on the trolley; The rail connecting mechanism at the back end of the large trolley is actuated, so that the rear rail in the rear rail connecting mechanism is turned to a horizontal state, and the trolley track in the rear heat treatment furnace, i.e., the rear trolley track, the rear rail and the trolley guide rails are sequentially connected to form a continuous rear straight track for the trolley to move; The small trolley is driven by the small trolley driving mechanism to move backward along the small trolley guide rails relative to the large trolley longitudinally, the rear pulling hook pushes the trolley to move backward along the rear straight track, and the trolley is pushed from the trolley guide rails to the rear trolley track through the rear rail, and the trolley enters the rear heat treatment furnace; The rear pulling hook is in a horizontal state by the rear pulling hook mechanism, and the rear pulling hook is pulled out of the pulling slot; The small trolley is driven by the small trolley driving mechanism to move forward along the small trolley guide rails longitudinally, and the rear pulling hook moves forward from below the trolley and leaves the rear heat treatment furnace.

2. A tray transfer method characterized by: The two-way feeding and discharging mechanism of the heat treatment furnace is mainly composed of a large trolley, a rail connecting mechanism and a small trolley, the large trolley is provided with longitudinally forward and backward extending and mutually parallel trolley guide rails and small trolley guide rails, the small trolley is rolling or slidingly arranged on the small trolley guide rails, and the small trolley driving mechanism is arranged on the large trolley to drive the small trolley to move along the small trolley guide rails; The forward and backward ends of the trolley are provided with push-pull grooves, and the push-pull grooves at the forward and backward ends of the trolley are respectively a forward push-pull groove and a backward push-pull groove; The forward and backward ends of the small trolley are provided with push-pull hook mechanisms including push-pull hooks, when the push-pull hooks are in a horizontal state driven by the push-pull hook mechanisms, the small trolley and the push-pull hook mechanisms are not higher than the bottom surface of the trolley; The step of feeding the trolley in the forward heat treatment furnace into the rear heat treatment furnace longitudinally opposite to the trolley is as follows: The rail connecting mechanism at the forward end of the large trolley is actuated, so that the forward rail in the forward rail connecting mechanism is turned over to a horizontal state, and the trolley track in the forward annealing furnace, i.e., the forward trolley track, the forward rail and the trolley guide rails are sequentially connected to form a continuous forward straight track for the trolley to move; The small trolley is longitudinally moved forward relative to the large trolley along the small trolley guide rails to the forward end of the large trolley driven by the small trolley driving mechanism, the forward push-pull hook protrudes forward beyond the forward end of the large trolley and penetrates into the forward annealing furnace from below the trolley on the forward trolley track to reach below the backward push-pull groove on the trolley; The forward push-pull hook is erected driven by the forward push-pull hook mechanism, and the upper end of the forward push-pull hook penetrates into the backward push-pull groove on the trolley; The small trolley is longitudinally moved backward relative to the large trolley along the small trolley guide rails driven by the small trolley driving mechanism, the forward push-pull hook pulls the trolley to move backward along the forward straight track, and the trolley is pulled out of the forward annealing furnace, and the trolley is moved to the trolley guide rails; The forward push-pull hook is in a horizontal state driven by the forward push-pull hook mechanism, and the forward push-pull hook is pulled out of the backward push-pull groove; The small trolley is longitudinally moved forward along the small trolley guide rails driven by the small trolley driving mechanism, and the small trolley penetrates from below the trolley until the backward push-pull hook on the small trolley is flush with the forward push-pull groove on the trolley, and the small trolley stops moving; The backward push-pull hook is erected driven by the backward push-pull hook mechanism, and the upper end of the backward push-pull hook penetrates into the forward push-pull groove on the trolley; The rail connecting mechanism at the rear end of the large trolley is actuated, so that the rear rail in the rear rail connecting mechanism is turned over to a horizontal state, and the trolley track in the rear annealing furnace, i.e., the rear trolley track, the rear rail and the trolley guide rails are sequentially connected to form a continuous rear straight track for the trolley to move; The small trolley is longitudinally moved backward relative to the large trolley along the small trolley guide rails driven by the small trolley driving mechanism, the rear push-pull hook pushes the trolley to move backward along the rear straight track, and the trolley is pushed from the trolley guide rails to the rear trolley track through the rear rail, and the trolley enters the rear annealing furnace; The rear push-pull hook is in a horizontal state driven by the rear push-pull hook mechanism, and the rear push-pull hook is pulled out of the forward push-pull groove; The small trolley is longitudinally moved forward along the small trolley guide rails driven by the small trolley driving mechanism, the rear push-pull hook moves forward from below the trolley, and the small trolley moves away from the rear annealing furnace.

3. The tray transfer method according to claim 1 or 2, characterized by: Before the rail clamping mechanism is driven to overturn to the horizontal state, the furnace door of the heat treatment furnace is in the open state.

4. The tray transfer method according to claim 1 or 2, characterized by: The push-pull hook swings in a transverse plane perpendicular to the longitudinal direction, and is in a horizontal state or a vertical state.

5. The tray transfer method according to claim 4, characterized by: In the longitudinal direction, the width of the push-pull slot is equal to the width of the push-pull hook.

6. The pallet transfer method according to claim 1 or 2, characterized in that: The large trolley can move relative to the ground in a transverse direction perpendicular to the longitudinal direction.

7. The pallet transfer method according to claim 1 or 2, characterized by: The small trolley driving mechanism comprises a driving sprocket shaft and a driven sprocket shaft arranged at two ends of the large trolley, driving sprockets and driven sprockets arranged on the driving sprocket shaft and the driven sprocket shaft, and a driving chain surrounding the driving sprockets and the driven sprockets. The driving chain is connected to the lower part of the small trolley, and the driving sprocket shaft is connected to a small trolley driving motor and a speed reduction mechanism for driving the driving sprocket shaft to rotate.

8. The pallet transfer method according to claim 1 or 2, characterized by: The tray guide rails and the small trolley guide rails are both two, and the two small trolley guide rails are located between the two tray guide rails.

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