A workpiece conveying equipment in a box-type furnace

Abstract

The present invention discloses a box-type workpiece conveying device for a furnace, which relates to the technical field of furnace conveying devices, including a push-pull trolley fixed to the end of a push-pull chain, a hook connected to the push-pull trolley through an axis, a pressure plate located at the bottom of the conveying platform on the front chamber lifting frame, a first baffle provided at the bottom of the conveying platform, and a second baffle provided at the bottom of the conveying platform along the forward direction of the push-pull trolley. When the hook moves forward with the push-pull trolley, it contacts the pressure plate and presses down. When the main mounting end of the hook reaches or exceeds the first baffle in the return direction of the push-pull chain, the hook is reset. This box-type workpiece conveying device for a furnace can adjust the mounting state of the hook only by moving the push-pull trolley back and forth, thereby unhooking and mounting between two heating states, and does not require manual effort to push the conveying platform for secondary mounting. It is convenient, practical and improves efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of in-furnace conveying equipment, in particular to a box-type in-furnace workpiece conveying equipment. Background Art

[0002] In a box-type gas carbonitriding multi-purpose furnace, the product is first heated in the heating chamber. Figure 1-3 , after heating, it enters the front room, where the product is air-cooled. After a certain period of air cooling, the push-pull chain and drive mechanism drag the product into the heating room for reheating. After the second heating, it is sent to the front room and oil-cooled. During these two conveyings, the push-pull chain is connected to the carrying conveying platform at the bottom of the product through the hook on the front trolley. The first hook is directly mounted on the conveying platform under the push of the push-pull chain. After the product is heated once and sent to the front room, the push-pull chain continues to move forward, causing the hook to contact the pressure plate, and the pressure plate causes the hook to separate from the conveying platform (the conveying platform moves left relative to the pressure plate). Because the pressure plate covers the lower end of the conveying platform, the hook cannot be mounted. At this time, the push-pull chain can be completely separated from the conveying platform ( Because air cooling takes time, and the push-pull chain retraction can better isolate the heat conduction between the two chambers), when secondary heating is required, the hook needs to be mounted under the conveying platform again and the product needs to be dragged into the heating chamber. The existing method requires manual use of an external trolley to push the conveying platform to the right so that it is not covered by the pressure plate. Only in this state can the hook be mounted and the product can be dragged into the heating chamber again for secondary heating. This method requires manual operation after air cooling. If the connection is not timely, the efficiency will be affected to a certain extent. On the other hand, each time the product is quenched, there will be a certain number or large volume of products, so the weight is relatively large. Manual pushing is laborious and not only inconvenient, but if the pushing position is too short, the hook cannot be mounted accurately. To this end, we propose a box-type furnace workpiece conveying equipment. Summary of the Invention

[0003] The object of the present invention is to provide a workpiece conveying device in a box-type furnace to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a workpiece conveying device in a box-type furnace, comprising a push-pull trolley fixed to the end of a push-pull chain, a hook connected to the push-pull trolley through an axis, a conveying platform for carrying quenched products is provided on the lifting frame of the front chamber, a pressure plate located at the bottom of the conveying platform is also provided on the lifting frame of the front chamber, a first baffle is provided at the bottom of the conveying platform, and the hook is pressed down to the inner side wall of the first baffle to form a mounting state when passing through the first baffle, and a hook is also provided at the bottom of the conveying platform along the forward direction of the push-pull trolley. The second baffle, when the hook moves forward with the push-pull trolley, hits the pressure plate and presses down, the other end of the hook is tilted, the push-pull trolley hits the edge of the conveying platform and pushes the conveying platform to move synchronously until the second baffle hits the tilted end of the hook to form a mounting state. When the push-pull trolley returns, the hook pulls the conveying platform back synchronously through the second baffle. Before the main mounting end of the hook reaches directly below the first baffle, the height of the main mounting end of the hook does not exceed the first baffle. When the main mounting end of the hook reaches or exceeds the first baffle in the return direction of the push-pull chain, the hook is reset.

[0005] Preferably, a first plane is provided at one end of the hook that contacts the first baffle, and the first plane is vertically fitted and contacts the inner side wall of the first baffle at the end of the hook to form a mounting.

[0006] Preferably, a second plane is provided at one end of the hook in contact with the second baffle. After the hook is completely pressed down by the pressing plate, the second plane becomes a vertical plane and fits and contacts the inner side surface of the second baffle to form a mounting.

[0007] Preferably, a limit strip is provided on the inner side wall of the pressure plate in the width direction, and the side of the secondary mounting end of the hook slides in accordance with the limit strip until the main mounting end of the hook reaches the first baffle and disengages, and the hook is reset.

[0008] Preferably, the limiting strip can be flipped from a horizontal limiting state to an upwardly inclined non-limiting state.

[0009] Preferably, the limiting strip is in a horizontal limiting state under the action of its own weight.

[0010] Preferably, a workpiece conveying equipment in a box-type furnace includes a push-pull trolley fixed to the end of a push-pull chain, and a hook is connected to the push-pull trolley through an axis. It is characterized in that: a two-layer shelf is provided on the lifting frame in the front chamber, and the conveying platform for carrying the quenched product is transferred on the two-layer shelf, and a pressure plate is provided on the shelf on the lower layer, and a first baffle is provided at the bottom of the conveying platform, and the hook is mounted when passing through the first baffle.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention adjusts the hook so that the hook's mounting state can be adjusted simply by pushing and pulling the trolley back and forth, thereby enabling unhooking and mounting between two heating states. No additional manual pushing of the conveying platform is required for secondary mounting, which is convenient, practical, and improves efficiency.

[0013] The present invention also changes the mounting state by setting up two layers of shelves. After the first heating, the upper layer is not unhooked, and after the second heating, it is unhooked through the lower layer, and no additional manual pushing process is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the heating chamber and the front chamber;

[0015] Figure 2 A schematic diagram of the structure of the hooking and unhooking states in the existing method;

[0016] Figure 3 This is a schematic diagram of the mounting state structure of a hook in the prior art;

[0017] Figure 4 for Figure 1 A top view of

[0018] Figure 5 This is a schematic structural diagram of the state in which the main mounting end of the hook of the present invention is mounted;

[0019] Figure 6 This is a schematic structural diagram of the state in which the secondary mounting end of the hook of the present invention is mounted;

[0020] Figure 7 Schematic diagram of the state structure for the hook to maintain sliding;

[0021] Figure 8 for Figure 7 A magnified schematic diagram of the structure of the middle B area;

[0022] Figure 9 This is a schematic diagram of the state structure before the hook is unhooked;

[0023] Figure 10 Schematic diagram of a specific structural state of the limit bar;

[0024] Figure 11 Schematic diagram of the structural status of the two-layer shelf.

[0025] In the figure: 1-push-pull trolley; 2-hook; 21-first plane; 22-second plane; 3-conveyor platform; 31-first baffle; 32-second baffle; 4-pressing plate; 5-shelf; 6-limiting bar; 7-front chamber; 8-heating chamber; 11-limiting plate. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 The present invention provides a technical solution: a workpiece conveying device in a box-type furnace, the device as a whole is composed of two parts: a front chamber 7 and a heating chamber 8, that is, Figure 1 The drive of the push-pull chain is set on the right side of the heating chamber 8. The push-pull chain is driven to move, and the end of the push-pull chain moves between the heating chamber 8 and the front chamber 7. The end of the push-pull chain is connected to the push-pull trolley 1. A shelf 5 is set at the same height as the track of the push-pull trolley 1 in the front chamber 7. The shelf 5 can move up and down to adjust the air cooling or oil cooling quenching of the workpiece. A conveying platform 3 for carrying the product workpiece slides on the shelf 5. The conveying platform 3 can be connected or separated from the end of the push-pull trolley 1 to realize pulling the workpiece into the heating chamber 8 or the push-pull trolley 1 returning empty.

[0028] The non-connected end of the push-pull trolley 1 is connected to the hook 2 through an axis, and the connecting axis is located at the non-end position of the hook 2, and the end of the hook 2 close to the push-pull trolley 1 is the main mounting end, and the other end is the auxiliary mounting end. The center of gravity of the hook 2 is located from the rotating shaft to the auxiliary mounting end of the hook 2, that is, when there is no external force, the main mounting end of the hook 2 is in a tilted state, and a limit plate 11 is provided on the push-pull trolley 1 to limit the maximum height position of the main mounting end of the hook 2. The bottom of the conveying platform 3 is provided with a first baffle 31 and a second baffle 32 in sequence in the forward direction of the push-pull trolley 1, and a pressure plate 4 is also fixed on the frame plate 5. The pressure plate 4 is located on the upper surface of the end of the hook 2 connected to the conveying platform 3 and the push-pull trolley 1.

[0029] like Figure 5As shown, before the push-pull trolley 1 is mounted for the first time, the right side of the conveying platform 3 protrudes relative to the pressure plate 4. When the push-pull trolley 1 moves forward, the upper surface of the hook 2 contacts the lower end of the first baffle 31, pressing the main mounting end downward, and then the main mounting end passes over the first baffle 31 and enters the inner side of the first baffle 31. The inner side is the forward direction of the push-pull trolley 1 and the return direction is the outer side. After the main mounting end of the hook 2 reaches the inner side of the first baffle 31, the main mounting end of the hook 2 is tilted again due to the weight of the hook 2 to form a mounting. In this state, the push-pull trolley 1 will drive the conveying platform 3 to move toward the heating chamber 8 when returning, and send the workpiece into the heating chamber 8 for initial heating. After the initial heating, the push-pull trolley 1 moves to the left, and the protruding platform on the top of the push-pull trolley 1 contacts the outer side of the first baffle 31 and moves synchronously until the upper surface of the hook 2 contacts the pressure plate 4. Under the action of the pressure plate 4, the main mounting end of the hook 2 moves down to a horizontal or approximately horizontal state, and the auxiliary mounting end moves up to contact the second baffle 32 to form a mounting, such as Figure 6 shown.

[0030] When unhooking is required, the push-pull trolley 1 moves back (to the right), and the contact between the auxiliary mounting end of the hook 2 and the second baffle 32 drives the conveying platform 3 to move synchronously (the pressure plate 4 moves relatively to the left). Because the auxiliary mounting end of the hook 2 is in the mounting state, it is subjected to the reaction force and will not fall. Before the upper surface of the auxiliary mounting end of the hook 2 contacts the inner side of the pressure plate 4, the push-pull trolley 1 stops moving or briefly returns a short distance to make the auxiliary mounting end of the hook 2 fall. Figure 7 As shown, in this state, before the main mounting end of the hook 2 reaches directly below the first baffle 31, it is necessary to maintain this state and translate. The translation can be carried out in two different ways, including but not limited to the following: Figure 7 The state of the hook 2 shown in the figure is different from the above-mentioned setting in that the center of gravity of the hook 2 is located at the secondary mounting end. The hook 2 can be moved directly while maintaining a stable state. After the main mounting end reaches or exceeds the first baffle 31, as shown in FIG. Figure 9 As shown, the auxiliary mounting end of the hook 2 contacts the inner side and lower surface of the pressure plate 4. In this way, the mounting method of the main mounting end of the hook 2 is also different from the above. The hook 2 will enter the inner side of the first baffle 31 under the push of the push-pull trolley 1, but because the weight of the hook 2 is balanced, it is necessary to cooperate with the pressure plate 4 to make the main mounting end of the hook 2 contact the inner side of the first baffle 31. Specifically, the push-pull trolley 1 moves forward so that the auxiliary mounting end of the hook 2 contacts the lower surface of the pressure plate 4 (the effective contact part, i.e. Figure 7 The lower surface of the cross-sectional portion in the figure) causes the main mounting end of the hook 2 to move upward, and the push-pull trolley 1 continues to move to the left by one end. The hook 2 keeps sliding, and then the push-pull trolley 1 is moved back. At this time, the hook 2 slides to the right but the conveying platform 3 does not move. The main mounting end of the hook 2 contacts the inner surface of the first baffle 31 to form a mounting;

[0031] Another way is to set a limit so that the hook 2 is limited under the action of its own weight and remains Figure 7 In the state shown, the limit is ended when the main mounting end of the hook 2 reaches or passes below the first baffle 31, as shown in FIG. Figure 9 As shown, decoupling is completed.

[0032] like Figure 5 As shown, the side wall of the main mounting end of the hook 2 is a plane, namely the first plane 21. When the first plane 21 is in contact with the inner wall of the first baffle 31, it is completely in contact with the inner wall to form a mounting. That is, in the mounting state, the normal of the first plane 21 is horizontal. Increasing the contact surface can reduce the pressure and maintain better stability.

[0033] like Figure 6 As shown, the secondary mounting end of the hook 2 is provided with a second plane 22, and the second plane 22 is normally oriented toward one side of the heating chamber 8 in the mounted state. Similarly, the second plane 22 is also normally horizontal when the secondary mounting end of the hook 2 is mounted, and is in contact with the inner side surface of the second baffle 32. The second plane 22 is arranged in this way not only to increase the contact surface to reduce pressure and maintain better stability, but also to facilitate separation and attachment.

[0034] like Figure 7 、 Figure 8 and Figure 9 As shown, in the above-mentioned limit for limiting the sliding state of the hook 2, the limit bar 6 is provided on the inner wall of both sides of the width direction of the pressure plate 4. The auxiliary mounting end of the hook 2 is adapted to be provided with a structure for sliding with the limit bar 6, such as a limit horizontal plate or a corresponding limit groove. The auxiliary mounting end of the hook 2 is limited and slidable, and is released when the main mounting end of the hook 2 reaches or exceeds the bottom of the first baffle 31. The hook 2 is reset, that is, it remains horizontal or inclined, depending on which of the above-mentioned methods is adopted.

[0035] Further, such as Figure 10 As shown, the limit bar 6 is hinged or axially connected and always maintains a horizontal state. It flips when receiving an upward force, for example, an elastic part is set to reset it. However, because the use environment is a high-temperature furnace and it will also undergo quenching, the self-weight deflection method is adopted (the center of gravity and the axis are not in the same vertical direction).

[0036] Different from the above-mentioned method of modifying the hook 2 for uncoupling and mounting, this solution is to arrange the frame plate 5 provided on the lifting frame of the front chamber 7 into two layers, the upper side is not unhooked during air cooling, that is, air cooling is performed by direct connection, and a pressure plate 4 is provided on the frame plate 5 of the lower layer for uncoupling, and then the lower layer is unhooked and moved downward for oil cooling.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A workpiece conveying device in a box-type furnace, comprising a push-pull trolley (1) fixed to the end of a push-pull chain, a hook (2) connected to the push-pull trolley (1) via an axis, a conveying platform (3) for carrying quenched products provided on a lifting frame in a front chamber, a pressing plate (4) located at the bottom of the conveying platform (3) provided on the lifting frame in the front chamber, a first baffle (31) provided at the bottom of the conveying platform (3), the hook (2) is pressed down to the inner side wall of the first baffle (31) when passing through the first baffle (31) to form a mounted state, characterized in that: A second baffle (32) is also provided at the bottom of the conveying platform (3) along the forward direction of the push-pull trolley (1). When the hook (2) moves forward with the push-pull trolley (1), it contacts the pressure plate (4) and presses down. The other end of the hook (2) tilts up, and the push-pull trolley (1) contacts the edge of the conveying platform (3) and pushes the conveying platform (3) to move synchronously until the second baffle (32) contacts the tilted end of the hook (2) to form a mounted state. When the push-pull trolley (1) returns, the hook (2) pulls the conveying platform (3) back synchronously through the second baffle (32). Before the main mounting end of the hook (2) reaches directly below the first baffle (31), the height of the main mounting end of the hook (2) does not exceed the first baffle (31). When the main mounting end of the hook (2) reaches or exceeds the first baffle (31) in the return direction of the push-pull chain, the hook (2) is reset. The end of the hook (2) that contacts the first baffle (31) is provided with a first plane (21), and the first plane (21) is vertically fitted and contacted with the inner side wall of the first baffle (31) at the end of the hook (2) to form a mounting; A second plane (22) is provided at one end of the hook (2) that contacts the second baffle (32). After the hook (2) is completely pressed down by the pressing plate (4), the second plane (22) becomes a vertical plane and abuts against the inner side surface of the second baffle (32) to form a mounting. A limit strip (6) is provided on the inner wall of the side edge in the width direction of the pressure plate (4), and the side edge of the auxiliary mounting end of the hook (2) is adapted to slide with the limit strip (6) until the main mounting end of the hook (2) reaches the first baffle (31) and disengages, and the hook (2) is reset. The limit bar (6) can be flipped from a horizontal limit state to a non-limit state tilted upwards. The limit bar (6) is in a horizontal limit state under the action of its own weight.

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