Bridge conveyor mechanism and formic acid furnace

Abstract

The present invention relates to the field of transportation, and in particular to a bridge conveying mechanism and a formic acid furnace. The bridge conveying mechanism includes a first conveying line, a second conveying line and a gate bridge unit. The first conveying line is used to be arranged in the first furnace cavity to convey the pallet; the second conveying line is used to be arranged in the second furnace cavity to convey the pallet; the gate bridge unit is arranged between the first furnace cavity and the second furnace cavity, and includes a support bridge, an elastic element, a door frame, a gate and an opening and closing power assembly; the door frame has a door hole, and the opening and closing power assembly is used to drive the gate to move to open or close the door hole; the support bridge is movably arranged in the door frame, and the elastic element is used to apply elastic force to the support bridge so that the support bridge reaches the working position; the support bridge at the working position is used to support the pallet transferred between the first conveying line and the second conveying line and passing through the door hole. The present invention can smoothly transfer the pallet between the first conveying line and the second conveying line to avoid changes in the position of the product in the pallet.

Description

Technical Field

[0001] The invention relates to the field of transportation, in particular to a bridge transportation mechanism and a formic acid furnace. Background Art

[0002] The formic acid furnace can be used to meet the needs of packaging and welding in the semiconductor industry. It has multiple independent process chambers inside. The working temperature in the process chamber can reach about 300°C. A gate assembly is arranged between two adjacent process chambers. A conveyor line is arranged in each process chamber so that the tray can be transferred to the next process chamber. When the gate assembly is closed, the two adjacent process chambers are isolated by the gate assembly. When the gate assembly is opened, the tray carrying the product can move forward from the upstream process chamber to the downstream process chamber.

[0003] The inventors of the present invention discovered that when the tray moves from the upstream process chamber to the downstream process chamber in the process chamber, the tray will pass through the gate assembly. In order to ensure the sealing performance, the gate assembly will have a certain span. Therefore, the end of the tray in the upstream process chamber facing the downstream process chamber will be suspended after it is separated from the upstream process chamber. After the tray is completely separated from the conveying line in the upstream process chamber, the end facing the upstream process chamber will also be suspended. Once suspended, the suspended end is at risk of sinking, and after the sunken end is supported by the conveying line in the downstream process chamber, it will be lifted up again. Regardless of the sinking process or the lifting process, the position of the product in the tray will change, affecting the welding accuracy and welding effect. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the deficiencies in the prior art, a bridge conveying mechanism is provided, which can smoothly transfer pallets between a first conveying line and a second conveying line to avoid changes in the position of products in the pallet.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a bridge conveying mechanism, comprising:

[0006] A first conveying line is configured in the first furnace chamber to convey the tray;

[0007] A second conveying line is configured in the second furnace chamber to convey the tray;

[0008] The gate bridge unit is arranged between the first furnace cavity and the second furnace cavity, and comprises a supporting bridge, an elastic element, a door frame, a gate and an opening and closing power assembly; the door frame has a door hole, and the opening and closing power assembly is used to drive the gate to move to open or close the door hole; the supporting bridge is movably arranged in the door frame, and the elastic element is used to apply elastic force to the supporting bridge to make the supporting bridge reach the working position;

[0009] The support bridge at the working position is used to support the pallet transferred between the first conveyor line and the second conveyor line and passing through the door hole;

[0010] When the gate closes the door opening, the support bridge is pushed by the gate to overcome the elastic force of the elastic element and leave the working position;

[0011] When the gate opens the door hole, the supporting bridge is separated from the gate and is driven by the elastic element to return to the working position.

[0012] A specific structure is further provided in which the up-down direction is used as the gate opening and closing direction, the gate is arranged above the supporting bridge, and the opening and closing power assembly is used to drive the gate to move downward to close the door hole, and drive the gate to move upward to open the door hole;

[0013] A bridge seat is installed in the door frame, and the supporting bridge is movably installed on the bridge seat. One end of the elastic element is connected to the supporting bridge, and the other end is connected to the bridge seat or the door frame.

[0014] A kinematic installation method between the support bridge and the bridge seat is further provided, wherein the support bridge is rotatably mounted on the bridge seat, one end of the elastic element is connected to the support bridge, and the other end is connected to the bridge seat;

[0015] When the gate moves down to the closed position, the gate pushes the support bridge to rotate downward and leave the working position;

[0016] When the gate moves upward to the open position, the elastic element drives the support bridge to rotate upward and return to the working position through its rebound.

[0017] Another moving installation method between the support bridge and the bridge seat is further provided, wherein the support bridge is slidably installed on the bridge seat, one end of the elastic element is connected to the support bridge, and the other end is connected to the bridge seat;

[0018] When the gate moves down to the closed position, the gate pushes the supporting bridge to move along its sliding direction and leave the working position;

[0019] When the gate moves upward to the closed position, the elastic element drives the support bridge to move along its sliding direction through its rebound and reset to the working position.

[0020] In order to further adjust the working position of the supporting bridge, an adjustment component is provided on the bridge seat;

[0021] The adjustment assembly includes an adjustment member, and the adjustment member is adjustably mounted on the bridge seat;

[0022] When the elastic element drives the supporting bridge to reset, the supporting bridge moves to abut against the adjusting member.

[0023] In order to further reduce the friction between the support bridge and the pallet when the support bridge is in the working position and supports the pallet, a support wheel is rotatably mounted on the support bridge;

[0024] When the support bridge is in the working position, the highest point of the support wheel is higher than the inner bottom surface of the door hole, and the support bridge and support wheel in the working position are used to support the pallet transferred between the first conveyor line and the second conveyor line and passing through the door hole.

[0025] In order to enable the gate to block the first furnace cavity and the second furnace cavity in a closed state, the door frame comprises a frame portion and two wall panels respectively located on both sides of the frame portion, and the inner peripheral wall of the frame portion and the wall panels on both sides form a door cavity;

[0026] The wall plate on one side of the frame is close to the first furnace cavity and is provided with the door hole, and the wall plate on the other side is close to the second furnace cavity and is also provided with the door hole;

[0027] The gate includes two sealing doors, which correspond to the door holes one by one. The sealing doors and the supporting bridge are both located in the door cavity. When the opening and closing power assembly drives the gate to move, the sealing doors open or close the corresponding door holes.

[0028] In order to enable the gate to more tightly seal the first furnace cavity and the second furnace cavity in the closed state, the gate further includes an intermediate plate, and the output end of the opening and closing power assembly is fixedly connected to the intermediate plate to drive the intermediate plate to move;

[0029] The supporting bridge is located on the path of the middle plate moving downward, and the middle plate is used to push the supporting bridge away from the working position;

[0030] The middle plate is arranged between the two sealing doors, and each sealing door is connected to the middle plate through at least two mutually parallel connecting rods, one end of the connecting rod is hinged to the sealing door, and the other end is hinged to the middle plate;

[0031] When the middle plate moves downwards until the sealing door moves downwards to abut against the bridge seat, the middle plate continues to move downwards and pushes the sealing door toward the corresponding door hole through the connecting rod.

[0032] In order to enable the supporting bridge to move better relative to the middle plate when the middle plate pushes the supporting bridge out of the working position, the middle plate is rotatably mounted with a pushing wheel, and the middle plate is used to push the supporting bridge out of the working position through its pushing wheel.

[0033] In order to further reduce the friction between the sealing door and the bridge seat as the sealing door approaches its corresponding door hole, a side-shift guide wheel is rotatably installed on the bridge seat at a position directly below each sealing door, and the side-shift guide wheel is abutted against the sealing door. The sealing door drives the side-shift guide wheel to rotate as it approaches its corresponding door hole.

[0034] In order to enable the support bridge to support the tray stably and evenly, the support bridge has two parts, which are respectively used to support the two sides of the bottom of the tray.

[0035] Further providing a specific structure of a first conveying line and a second conveying line, wherein the first conveying line and the second conveying line both include a conveying line unit;

[0036] The conveyor line unit includes a driving mechanism and two conveying tracks arranged at intervals; a plurality of transmission rollers spaced apart along the conveying direction of the pallet are rotatably mounted on the inner side of the conveying track, the wheel surface of the transmission roller is used to contact the bottom surface of the pallet, and the driving mechanism drives the transmission roller to rotate;

[0037] A plurality of positioning rollers spaced apart along the conveying direction of the pallet are rotatably mounted on the top end of the conveying track, and the side surfaces of the pallet and the wheel surfaces of the positioning rollers are arranged opposite to each other.

[0038] The present invention also provides a formic acid furnace, comprising a bridge conveying mechanism.

[0039] The beneficial effects of the present invention are as follows: the gate bridge unit in the present invention can support the pallet through its supporting bridge when the gate opens the door hole, thereby preventing the end of the pallet from sinking due to loss of support during the transfer between the first conveyor line and the second conveyor line and lifting up after regaining support, so that the pallet can be smoothly transferred between the first conveyor line and the second conveyor line, ensuring that the position of the product in the pallet will not change, thereby ensuring the subsequent welding accuracy and welding effect; and, the supporting bridge in the present invention will not interfere with the closing of the gate door hole, and will not affect the sealing performance and sealing effect of the gate.

[0040] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0042] Figure 1 It is a structural schematic diagram of the formic acid furnace of the present invention when the gate is in a closed state;

[0043] Figure 2 for Figure 1 A cross-sectional view of

[0044] Figure 3 It is a structural schematic diagram of the formic acid furnace of the present invention when the gate is in an open state;

[0045] Figure 4 for Figure 3 A cross-sectional view of

[0046] Figure 5 It is a schematic diagram of the structure of the bridge conveying mechanism of the present invention when the gate is in a closed state;

[0047] Figure 6 for Figure 5 The main view;

[0048] Figure 7 It is a schematic diagram of the structure of the bridge conveying mechanism of the present invention when the gate is in an open state;

[0049] Figure 8 It is a structural schematic diagram of the gate bridge unit of the present invention (without the wallboard and the sealing door on one side) when the gate is in a closed state;

[0050] Fig. 9 for Figure 8 A magnified view of part A;

[0051] Fig.10 It is a structural schematic diagram of the supporting bridge of the present invention in a non-working position;

[0052] Fig.11 A cross-sectional view of the gate bridge unit of the present invention when the gate is in a closed state;

[0053] Fig.12 Another cross-sectional view of the gate bridge unit of the present invention when the gate is in a closed state;

[0054] Fig.13 It is a structural schematic diagram of the gate bridge unit of the present invention (without the wallboard and the sealing door on one side) when the gate is in an open state;

[0055] Fig.14 It is a structural schematic diagram of the support bridge of the present invention in a working position;

[0056] Fig.15 A cross-sectional view of the gate bridge unit of the present invention when the gate is in an open state;

[0057] Fig.16 Another cross-sectional view of the gate bridge unit of the present invention when the gate is in an open state;

[0058] Fig.17 It is a schematic diagram of the structure of the gate of the present invention;

[0059] Fig.18It is a schematic structural diagram of the first conveying line and the second conveying line of the present invention;

[0060] Fig.19 for Fig.18 A top view of

[0061] In the figure, 1, first conveyor line; 11, driving mechanism; 12, conveyor track; 13, transmission roller; 14, positioning roller; 15, driving gear; 16, positioning pressure plate; 17, transmission rod; 2, first furnace chamber; 3, tray; 4, second conveyor line; 5, second furnace chamber; 6, gate bridge unit; 61, supporting bridge; 611, supporting wheel; 62, elastic element; 63, door frame; 631, frame; 632, wall panel; 6321, door hole; 64, gate; 641, sealing door; 6411, matching block; 642, middle plate; 6421, pushing wheel; 643, connecting rod; 65, opening and closing power assembly; 66, bridge seat; 67, adjustment assembly; 68, side shift guide wheel; 69, abutment. DETAILED DESCRIPTION

[0062] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner only, and therefore only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0063] Embodiment 1: Figures 1 to 19 As shown, a bridge conveying mechanism comprises:

[0064] A first conveying line 1 is configured in the first furnace chamber 2 to convey the tray 3;

[0065] A second conveying line 4 is configured to be arranged in the second furnace chamber 5 to convey the tray 3;

[0066] The gate bridge unit 6 is arranged between the first furnace cavity 2 and the second furnace cavity 5, and includes a support bridge 61, an elastic element 62, a door frame 63, a gate 64 and an opening and closing power assembly 65; the door frame 63 has a door hole 6321, and the opening and closing power assembly 65 is used to drive the gate 64 to move to open or close the door hole 6321; the support bridge 61 is movably arranged in the door frame 63, and the elastic element 62 is used to apply elastic force to the support bridge 61 to make the support bridge 61 reach the working position;

[0067] The support bridge 61 at the working position is used to support the pallet 3 transferred between the first conveyor line 1 and the second conveyor line 4 and passing through the door hole 6321;

[0068] When the gate 64 closes the door hole 6321, the support bridge 61 is pushed by the gate 64 to overcome the elastic force of the elastic element 62 and leave the working position;

[0069] When the gate 64 opens the door hole 6321 , the supporting bridge 61 is separated from the gate 64 and is driven by the elastic element 62 to return to the working position.

[0070] Specifically, the gate bridge unit 6 in this embodiment can support the pallet 3 through its support bridge 61 when the gate 64 opens the door hole 6321, so as to prevent the end of the pallet 3 from sinking due to loss of support during the transfer between the first conveyor line 1 and the second conveyor line 4 and from lifting up after regaining support, so that the pallet 3 can be smoothly transferred between the first conveyor line 1 and the second conveyor line 4, ensuring that the position of the product in the pallet 3 will not change, thereby ensuring the subsequent welding accuracy and welding effect. In addition, the support bridge 61 in this embodiment will not interfere with the gate 64 closing the door hole 6321, and will not affect the sealing performance and sealing effect of the gate 64.

[0071] Among them, Figures 1 to 19 In the structure shown, the gate 64 is disposed above the supporting bridge 61, and the opening and closing power assembly 65 is used to drive the gate 64 to move downward to close the door hole 6321, and to drive the gate 64 to move upward to open the door hole 6321;

[0072] A bridge seat 66 is installed in the door frame 63 , and the supporting bridge 61 is movably installed on the bridge seat 66 . One end of the elastic element 62 is connected to the supporting bridge 61 , and the other end is connected to the bridge seat 66 or the door frame 63 .

[0073] It should be noted that the gate 64 can also be arranged on the left, right, front, rear, bottom, etc. of the support bridge 61. In addition, there can be multiple motion installation modes between the support bridge 61 and the bridge seat 66, and three of them are listed below.

[0074] The first one, such as Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.13 , Fig.14 and Fig.15 As shown, the support bridge 61 is rotatably mounted on the bridge seat 66, one end of the elastic element 62 is connected to the support bridge 61, and the other end is connected to the bridge seat 66;

[0075] When the gate 64 moves down to the closed position, the gate 64 pushes the support bridge 61 to rotate downward and leave the working position;

[0076] When the gate 64 moves upward to the open position, the elastic element 62 drives the support bridge 61 to rotate upward and return to the working position through its rebound.

[0077] The second type is that the support bridge 61 is slidably installed on the bridge seat 66 in the left-right direction, one end of the elastic element 62 is connected to the support bridge 61, and the other end is connected to the bridge seat 66;

[0078] When the gate 64 moves down to the closed position, the gate 64 pushes the support bridge 61 to move along its sliding direction and leave the working position;

[0079] When the gate 64 moves upward to the closed position, the elastic element 62 drives the supporting bridge 61 to move along its sliding direction and return to the working position through its rebound.

[0080] In this sliding installation mode, the surface of the support bridge 61 that contacts the gate 64 is an inclined surface, and the gate 64 acts on the inclined surface, thereby pushing the support bridge 61 to slide in the horizontal direction during the downward movement of the gate 64.

[0081] The third type is that the support bridge 61 is slidably mounted on the bridge seat 66 in the up-down direction, one end of the elastic element 62 is connected to the support bridge 61, and the other end is connected to the bridge seat 66;

[0082] When the gate 64 moves down to the closed position, the gate 64 pushes the support bridge 61 to slide downward and leave the working position;

[0083] When the gate 64 moves upward to the closed position, the elastic element 62 drives the support bridge 61 to slide upward and return to the working position through its rebound.

[0084] In this embodiment, the first structure is preferred. In this structure, the support bridge 61 can be switched between the working position and the non-working position by only slight rotation without requiring a large movement stroke.

[0085] In this embodiment, there are two supporting bridges 61, which are respectively used to support two sides of the bottom of the tray 3. In this way, it can be ensured that the supporting bridges 61 support the tray 3 stably.

[0086] In this embodiment, the first conveyor line 1 and the second conveyor line 4 may have various structures as long as they can stably convey the pallet 3 , and one structure is listed below.

[0087] like Fig.18 and Fig.19 As shown, the first conveyor line 1 and the second conveyor line 4 both include a conveyor line unit; the conveyor line unit includes a driving mechanism 11 and two conveying tracks 12 arranged at intervals; a plurality of transmission rollers 13 spaced apart along the conveying direction of the tray 3 are rotatably mounted on the inner side of the conveying track 12, the wheel surface of the transmission roller 13 is used to contact the bottom surface of the tray 3, and the driving mechanism 11 drives the transmission roller 13 to rotate;

[0088] A plurality of positioning rollers 14 spaced apart along the conveying direction of the tray 3 are rotatably mounted on the top of the conveying track 12 , and the side surfaces of the tray 3 and the wheel surfaces of the positioning rollers 14 are arranged opposite to each other.

[0089] Specifically, the tray 3 is transported by the driving rollers 13 on the two conveying tracks 12 . The structure of the driving rollers 13 is relatively stable, and can ensure that the tray 3 is transported smoothly.

[0090] The driving mechanism 11 may be a motor, and the conveying track 12 is also rotatably mounted with a plurality of driving gears 15 meshing in sequence along its extension direction, and each transmission roller 13 is coaxially connected to one of the driving gears 15, and two driving gears 15 aligned with each other on the two conveying tracks 12 are connected by transmission through a transmission rod 17, and the motor is connected to one of the driving gears 15 on one of the conveying tracks 12 to drive the rotation. In this way, the synchronous rotation of all the driving rollers 13 can be achieved, so that the tray 3 can be conveyed more smoothly.

[0091] like Fig.18 and Fig.19 As shown, a plurality of positioning plates 16 are installed at intervals on each conveying track 12 , and the positioning plates 16 are placed above the conveyed pallet 3 to limit the lifting or warping space of the pallet 3 .

[0092] In this embodiment, the opening and closing power assembly 65 can be a gas cylinder, an oil cylinder, an electric push rod, an electric cylinder, etc., which is not limited here.

[0093] Embodiment 2: Based on Embodiment 1, Fig.11 and Fig.15 As shown, an adjustment assembly 67 is provided on the bridge seat 66; the adjustment assembly 67 includes an adjustment member, and the adjustment member is installed on the bridge seat 66 with an adjustable position; when the elastic element 62 drives the support bridge 61 to reset, the support bridge 61 moves to abut against the adjustment member.

[0094] There are many ways to adjust the position of the adjusting member. For example, the adjusting member can be threadedly mounted on the bridge seat 66, and can also be locked on the bridge seat 66 by a locking nut, which will not be described in detail here.

[0095] Specifically, after the support bridge 61 moves to abut against the adjustment member, it cannot continue to move under the rebound effect of the elastic element 62, so that the support bridge 61 stops at the working position. Therefore, by adjusting the position of the adjustment member, the working position of the support bridge 61 can be adjusted, thereby improving the flexibility of the work.

[0096] Embodiment 3: Based on Embodiment 1 or Embodiment 2, Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.13 , Fig.14 and Fig.15 As shown, a support wheel 611 is rotatably mounted on the support bridge 61;

[0097] When the support bridge 61 is in the working position, the highest point of the support wheel 611 is higher than the inner bottom surface of the door hole 6321, and the support bridge 61 and the support wheel 611 in the working position are used to support the pallet 3 transferred between the first conveyor line 1 and the second conveyor line 4 and passing through the door hole 6321.

[0098] Specifically, when the support bridge 61 is in the working position and supports the pallet 3, the pallet 3 is in rolling contact with the support wheel 611, thereby reducing the friction resistance between the pallet 3 and the support bridge 61, making it convenient for the pallet 3 to be transferred between the first conveyor line 1 and the second conveyor line 4 without warping or shaking under the support of the support bridge 61.

[0099] Embodiment 4: Based on Embodiment 1, Embodiment 2 or Embodiment 3, Fig.12 , Fig.16 and Fig.17 As shown, the door frame 63 comprises a frame portion 631 and two wall panels 632 respectively located on both sides of the frame portion 631, and the inner peripheral wall of the frame portion 631 and the wall panels 632 on both sides form a door cavity;

[0100] The wall plate 632 on one side of the frame 631 is close to the first furnace cavity 2 and has a door hole 6321, and the wall plate 632 on the other side is close to the second furnace cavity 5 and also has a door hole 6321;

[0101] The gate 64 includes two sealing doors 641 , which correspond to the door holes 6321 one by one. The sealing doors 641 and the supporting bridge 61 are both located in the door cavity. When the opening and closing power assembly 65 drives the gate 64 to move, the sealing doors 641 open or close the corresponding door holes 6321 .

[0102] The first furnace cavity 2 and the second furnace cavity 5 are provided with openings for the tray 3 to pass through on the side close to the gate bridge unit 6. The wall panel 632 on one side of the frame 631 is connected to the first furnace cavity 2, and a sealing ring is arranged between the two. The wall panel 632 on the other side is connected to the second furnace cavity 5, and a sealing ring is also arranged between the two. When the gate 64 is opened, the first furnace cavity 2, the door cavity and the second furnace cavity 5 are connected in sequence. When the gate 64 is closed, each sealing door 641 blocks a door hole 6321 on a wall panel 632, thereby achieving the isolation between the first furnace cavity 2 and the second furnace cavity 5 as much as possible, and the blocking effect is good.

[0103] Embodiment 5: Fig.12 , Fig.16 and Fig.17 As shown, the gate 64 also includes an intermediate plate 642, and the output end of the opening and closing power assembly 65 is fixedly connected to the intermediate plate 642 to drive the intermediate plate 642 to move;

[0104] The support bridge 61 is located on the path of the middle plate 642 moving downward, and the middle plate 642 is used to push the support bridge 61 away from the working position;

[0105] The middle plate 642 is disposed between the two sealing doors 641. Each sealing door 641 is connected to the middle plate 642 via at least two mutually parallel connecting rods 643. One end of the connecting rod 643 is hinged to the sealing door 641, and the other end is hinged to the middle plate 642.

[0106] When the middle plate 642 moves downwards until the sealing door 641 moves downwards to abut against the bridge seat 66 , the middle plate 642 continues to move downwards and pushes the sealing door 641 toward the corresponding door hole 6321 through the connecting rod 643 .

[0107] Specifically, when the sealing door 641 moves downward until it abuts against the bridge seat 66, the middle plate 642 continues to move downward under the drive of the opening and closing power assembly 65, thereby driving the connecting rod 643 to rotate. The connecting rod 643 pushes the sealing door 641 toward the corresponding door hole 6321 and squeezes the corresponding wall panel 632, so that the sealing door 641 can further and better seal the corresponding door hole 6321.

[0108] In this embodiment, if Fig.11 , Fig.13 , Fig.14 and Fig.15 As shown, a position-adjustable abutment member 69 is installed at the position of the bridge seat 66 facing the middle plate 642 , and the downward movement of the middle plate 642 is limited by the abutment member 69 abutting against the middle plate 642 .

[0109] Embodiment 6: Based on Embodiment 5, Figure 8 , Fig. 9 and Fig.13 As shown, the support bridge 61 is located on the path of the middle plate 642 moving downward, and the middle plate 642 is rotatably mounted with a pushing wheel 6421 , and the middle plate 642 is used to push the support bridge 61 away from the working position through its pushing wheel 6421 .

[0110] Specifically, in the process of the middle plate 642 pushing the support bridge 61 out of the working position, the pushing wheel 6421 and the support bridge 61 are in rolling contact, which can make the support bridge 61 move better relative to the middle plate 642, so that the support bridge 61 can leave the working position more smoothly.

[0111] like Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.13 , Fig.14 and Fig.15As shown, the part of the bridge seat 66 directly below each sealing door 641 is rotatably installed with a side-shift guide wheel 68; the middle plate 642 moves downward until the sealing door 641 contacts the side-shift guide wheel 68, and when it continues to move, the sealing door 641 moves toward the corresponding door hole 6321 and drives the side-shift guide wheel 68 in contact with it to rotate.

[0112] Specifically, the side-shift guide wheel 68 is in rolling contact with the sealing door 641 , and in the process of the sealing door 641 moving toward its corresponding door hole 6321 , the movement resistance of the sealing door 641 can be reduced, so that the sealing door 641 can better seal the door hole 6321 .

[0113] In addition, if Fig. 9 and Fig.13 As shown, each sealing door 641 is provided with a matching block 6411 at a position above the side shift guide wheel 68, and the side shift guide wheel 68 is in rolling contact with the matching block 6411. The matching block 6411 can reduce the thickness of the sealing door 641 while ensuring the rolling stroke of the side shift guide wheel 68 relative to the sealing door 641, thereby reducing the weight of the entire gate 64.

[0114] In this embodiment, the axes of the pushing wheel 6421 and the side shift guide wheel 68 are perpendicular to each other.

[0115] Embodiment 7: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a formic acid furnace includes the bridge conveying mechanism as in any one of embodiments 1 to 6.

[0116] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A bridge conveying mechanism, characterized in that: include: A first conveying line (1) is configured to be arranged in the first furnace cavity (2) to convey the tray (3); A second conveying line (4) is configured to be arranged in the second furnace cavity (5) to convey the tray (3); A gate bridge unit (6) is arranged between the first furnace cavity (2) and the second furnace cavity (5), and comprises a support bridge (61), an elastic element (62), a door frame (63), a gate (64), and an opening and closing power assembly (65); the door frame (63) is provided with a door hole (6321), and the opening and closing power assembly (65) is used to drive the gate (64) to move so as to open or close the door hole (6321); the support bridge (61) is movably arranged in the door frame (63), and the elastic element (62) is used to apply elastic force to the support bridge (61) so that the support bridge (61) reaches a working position; The support bridge (61) at the working position is used to support the pallet (3) transferred between the first conveyor line (1) and the second conveyor line (4) and passing through the door hole (6321); When the gate (64) closes the door hole (6321), the support bridge (61) is pushed by the gate (64) to overcome the elastic force of the elastic element (62) and leave the working position; When the gate (64) opens the door hole (6321), the support bridge (61) is separated from the gate (64) and is driven by the elastic element (62) to return to the working position; The gate (64) is arranged above the supporting bridge (61), and the opening and closing power assembly (65) is used to drive the gate (64) to move downward to close the door hole (6321), and to drive the gate (64) to move upward to open the door hole (6321); A bridge seat (66) is installed in the door frame (63), the supporting bridge (61) is rotatably mounted on the bridge seat (66), one end of the elastic element (62) is connected to the supporting bridge (61), and the other end is connected to the bridge seat (66); When the gate (64) moves downward to a closed position, the gate (64) pushes the support bridge (61) to rotate downward and leave the working position; When the gate (64) moves upward to the open position, the elastic element (62) drives the support bridge (61) to rotate upward through its rebound and return to the working position; A support wheel (611) is rotatably mounted on the support bridge (61); When the support bridge (61) is in the working position, the highest point of the support wheel (611) is higher than the inner bottom surface of the door hole (6321), and the support bridge (61) and the support wheel (611) in the working position are used to support the pallet (3) that is transferred between the first conveyor line (1) and the second conveyor line (4) and passes through the door hole (6321); The gate (64) is rotatably mounted with a driving wheel (6421), and the gate (64) is used to drive the supporting bridge (61) away from the working position via its driving wheel (6421).

2. The bridge conveying mechanism according to claim 1 is characterized in that: An adjustment component (67) is provided on the bridge seat (66); The adjustment assembly (67) comprises an adjustment member, and the adjustment member is mounted on the bridge seat (66) in an adjustable manner; When the elastic element (62) drives the support bridge (61) to reset, the support bridge (61) moves to abut against the adjustment member.

3. The bridge conveying mechanism according to claim 1 is characterized in that: The door frame (63) comprises a frame portion (631) and two wall panels (632) respectively located on both sides of the frame portion (631); the inner peripheral wall of the frame portion (631) and the wall panels (632) on both sides form a door cavity; The wall panel (632) on one side of the frame (631) is close to the first furnace cavity (2) and is provided with the door hole (6321), and the wall panel (632) on the other side is close to the second furnace cavity (5) and is also provided with the door hole (6321); The gate (64) comprises two sealing doors (641), the sealing doors (641) corresponding to the door holes (6321) one by one, the sealing doors (641) and the supporting bridge (61) are both located in the door cavity, and when the opening and closing power assembly (65) drives the gate (64) to move, the sealing doors (641) open or close the corresponding door holes (6321).

4. The bridge conveying mechanism according to claim 3 is characterized in that: The gate (64) further comprises an intermediate plate (642), and the output end of the opening and closing power assembly (65) is fixedly connected to the intermediate plate (642) to drive the intermediate plate (642) to move; The supporting bridge (61) is located on a path for the intermediate plate (642) to move downward, and the intermediate plate (642) is used to push the supporting bridge (61) away from a working position; The middle plate (642) is arranged between the two sealing doors (641), and each sealing door (641) is connected to the middle plate (642) via at least two mutually parallel connecting rods (643), one end of the connecting rod (643) is hinged to the sealing door (641), and the other end is hinged to the middle plate (642); When the middle plate (642) moves downwards until the sealing door (641) moves downwards to abut against the bridge seat (66), the middle plate (642) continues to move downwards and pushes the sealing door (641) toward the corresponding door hole (6321) through the connecting rod (643).

5. The bridge conveying mechanism according to claim 4 is characterized in that: A lateral guide wheel (68) is rotatably mounted on the bridge seat (66) at a position directly below each sealing door (641), and the lateral guide wheel (68) abuts against the sealing door (641). The sealing door (641) drives the lateral guide wheel (68) to rotate as it moves toward the corresponding door hole (6321).

6. The bridge conveying mechanism according to claim 1 is characterized in that: There are two supporting bridges (61), which are respectively used to support two sides of the bottom of the tray (3).

7. The bridge conveying mechanism according to claim 1 is characterized in that: The first conveying line (1) and the second conveying line (4) both comprise a conveying line unit; The conveyor line unit comprises a driving mechanism (11) and two conveying tracks (12) arranged at intervals; a plurality of transmission rollers (13) arranged at intervals along the conveying direction of the pallet (3) are rotatably mounted on the inner side of the conveying track (12); the wheel surface of the transmission roller (13) is used to contact the bottom surface of the pallet (3); and the driving mechanism (11) drives the transmission roller (13) to rotate; A plurality of positioning rollers (14) are rotatably mounted on the top end of the conveying track (12) and are spaced apart along the conveying direction of the tray (3). The side surfaces of the tray (3) and the wheel surfaces of the positioning rollers (14) are arranged opposite to each other.

8. A formic acid furnace, characterized in that: It comprises a bridge conveying mechanism as described in any one of claims 1 to 7.

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