A cumulative type ground rail conveying and powder spraying coating production system

Abstract

The present application relates to a kind of accumulative ground rail conveying powder spraying coating production systems, including conveying line system, coating pretreatment area, powder spraying room, buffer area and curing oven sequentially arranged along the conveying line system conveying direction, the curing oven is supported and fixed by support frame body and is set upwards, the conveying line system includes first rail, second rail, powder spraying room chain conveying mechanism, buffer area chain conveying mechanism, curing oven chain conveying mechanism, first lifting device and second lifting device;Conveying system can buffer the workpiece after spraying, ensure that there is no vacancy in a certain station when entering curing oven, also not let the carrier trolley stop in the paint spraying room, improve production operation efficiency, realize automatic production;Workpiece can be at the highest temperature, to achieve the best curing effect;Carrier trolley can be driven between adjacent two chain conveying mechanisms, greatly improve the efficiency of production.

Description

Technical Field

[0001] This invention relates to an accumulation-type ground rail conveying powder coating production system. Background Technology

[0002] The coating process typically includes steps such as primer spraying, leveling, primer curing, putty application, putty curing, putty finishing, finishing putty curing, putty surface sanding, topcoat spraying, leveling, and topcoat curing. Coating production lines usually use ground-rail chain conveyor systems to transport workpieces between different coating stations.

[0003] Existing painting production lines are usually equipped with transport trolleys, which are slidably installed on rails set on the ground. The transport trolleys are driven by a conveyor chain, and the stopping and stopping of the transport chain is controlled to stop the transport trolleys. In addition, on the coating production line, after being sprayed on the transport trolley, the workpieces generally enter the curing oven for paint curing. During the spraying process, because some fine areas of the workpieces cannot be reached by the machine, a combination of automatic and manual spraying is required. Due to the manual spraying, the spraying time for each workpiece cannot be accurately determined, but the curing time in the curing oven is limited, and the workpieces must be transported after the time is up. Therefore, based on this structure, two situations may occur: 1) When a workpiece is sprayed slowly, it cannot enter the curing oven on time, leaving a station in the curing oven empty, resulting in energy waste; 2) When a workpiece is sprayed quickly, while the curing oven is still curing, the workpieces sprayed in the spray booth can only be transported after the workpieces in the curing oven have finished curing, which affects production efficiency to some extent.

[0004] Furthermore, curing ovens are used for topcoat curing. In these ovens, hot air typically rises from the bottom up. Since the workpiece needs to cure under this high-temperature airflow, it's best to place the workpiece at the top of the curing oven, such as in a bridge-type drying oven. This oven should be sealed on all four sides and top, with the oven frame elevated, and the workpiece enters through a pre-drilled opening at the bottom. This achieves optimal results. However, in existing technologies, for heavy workpieces, existing conveyor lines, due to structural limitations, cannot use bridge-type drying ovens. Instead, the curing oven is directly connected to the spray booth on the ground, which does not allow for optimal curing. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes an accumulation-type ground rail conveying powder coating production system.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An accumulation-type ground rail conveyor powder coating production system includes a conveyor system, a pre-treatment area for coating, a powder spraying chamber, a buffer area, an inlet lifting and translation machine, a curing oven, and an outlet lifting and translation machine arranged sequentially along the conveying direction of the conveyor system. The curing oven is supported and fixedly installed by a support frame. The conveyor system includes a first rail, a second rail, a chain conveyor mechanism for the powder spraying chamber, a chain conveyor mechanism for the buffer area, and a chain conveyor mechanism for the curing oven.

[0008] The first track is used for the movement of the transport trolley and is located in the pre-painting treatment area, powder spraying room, and buffer area.

[0009] The second track is used for moving the transport trolley and is located inside the curing oven;

[0010] The powder spraying booth chain conveyor mechanism is located inside the powder spraying booth, and includes several first hook-type propulsion components that are evenly distributed on the conveyor chain at intervals to propel the transport trolley forward.

[0011] The buffer zone chain conveyor mechanism includes a front chain conveyor mechanism and a rear chain conveyor mechanism. Elastic propulsion components are evenly distributed at intervals on the conveyor chain of the front chain conveyor mechanism, and second hook-type propulsion components are evenly distributed at intervals on the conveyor chain of the rear chain conveyor mechanism.

[0012] A curing oven chain conveyor mechanism is located inside the curing oven, which includes several third hook-type propulsion components that are evenly distributed on the conveyor chain at intervals to propel the transport trolley forward.

[0013] The furnace entry lifting and translation machine and the furnace exit lifting and translation machine are respectively located at the inlet end and the outlet end of the curing furnace, and the furnace entry lifting and translation machine and the furnace exit lifting and translation machine have the same structure. Both include a lifting platform that can be lifted up and down. A third track, a lifting section chain conveying mechanism, and a fourth hook-type propulsion component are provided on the lifting platform.

[0014] In some embodiments, the elastic propulsion assembly includes a base plate fixed to a conveyor chain, and a first pusher is hinged to the base plate along a back-and-forth swinging motion. The first pusher includes a hinge portion and a front end portion and a rear end portion disposed at the front and rear ends of the hinge portion. The upper end of the rear end portion is provided with an upwardly extending pushing portion, and the lower end is connected to the base plate by a first compression spring. The first compression spring provides elastic force to keep the rear end portion in an upward tilted position and to make the front end portion abut against the base plate. When the rear end portion is in an upward tilted position, the pushing portion can push the transport trolley forward.

[0015] In some embodiments, a stop mechanism is further provided on the front chain conveyor mechanism. The stop mechanism is movably configured and includes a stop mode or a separation mode. In the stop mode, it can contact the transport trolley to restrict the movement of the transport trolley. In the separation mode, it can remain separated from the transport trolley and not contact it. When the stop mechanism is in the stop mode, the moving elastic propulsion component can be compressed by the stopped transport trolley and then disengage from the transport trolley.

[0016] In some embodiments, the stopping mechanism includes a mounting plate with a mounting seat on the mounting plate. A swing seat is hinged to one side of the mounting seat. A stop seat for limiting the forward movement of the transport trolley is provided on the swing seat. A cylinder is provided on the side of the mounting seat opposite the swing seat. A roller is provided on the piston rod of the cylinder. A protrusion and a recess are provided at the lower end of the swing seat. The protrusion and the recess are transitioned by an arc. The swing seat uses its own weight to make its protrusion or recess abut against the roller. When the protrusion abuts against the roller, the stopping mechanism is in a stopped state. When the recess abuts against the roller, the stopping mechanism is in a disengaged state.

[0017] In some embodiments, the first, second, third, and fourth hook-type propulsion assemblies have the same structure, each including a hook seat fixed to the conveyor chain. The hook seat consists of a bottom fixed to the chain and a head and a tail extending from both ends of the bottom. The bottom, head, and tail are integrally formed and U-shaped. A second push head is hinged to the tail. A second compression spring is connected to the bottom. The upper end of the second compression spring presses against the inner bottom surface of the second push head to maintain its shape. A gap is formed between the end of the second push head and the head of the hook seat. Under the action of the second compression spring, the second push head forms an upward slope angle at the end facing the head.

[0018] In some embodiments, a feeding detection mechanism and a discharging detection mechanism are provided on the furnace lifting and translation machine. The feeding detection mechanism is used to detect whether the transport trolley has entered the third track, and the discharging detection mechanism is used to detect whether the transport trolley has moved out of the third track. A detection rod is provided on the outside of the fourth hook-type propulsion assembly to cooperate with the feeding detection mechanism and the discharging detection mechanism for detection.

[0019] In some embodiments, the feeding detection mechanism includes a first vertical profile component, on which a feeding detection photoelectric probe is provided. When the transport trolley enters the third track, the end of the detection rod on the fourth hook-type propulsion assembly passes through the probe portion of the feeding detection photoelectric probe.

[0020] In some embodiments, the discharge detection mechanism includes a second vertical profile member, an upper support member is provided at the upper end of the second vertical profile member, a first swing seat is sway-hinged on the upper support plate, the first swing seat includes a first swing part rotatably disposed on one side of the upper support plate and an extension part and a pressing part disposed on the front and rear sides of the first swing part, an extension rod is hinged on the extension part, a lower support member is provided at the lower end of the second vertical profile member, a guide hole is provided at the upper end of the lower support plate, the lower end of the extension rod is guided vertically into the guide hole, and a discharge detection photoelectric probe is provided on one side of the lower support member. When the transport trolley moves out of the third track, the detection rod on the fourth hook-type propulsion assembly can press the pressing part and drive the extension rod to move upward through the extension part, so that the lower end of the extension rod disengages from the probe part of the discharge detection photoelectric probe.

[0021] In some embodiments, the furnace entry lifting and translation machine and the furnace exit lifting and translation machine have the same structure, both including a vertical lifting guide rail, a crossbeam connected to the upper end of the two vertical lifting guide rails, a lifting platform that is movably disposed between the two vertical lifting guide rails, and a chain lifting device that drives the lifting platform to move up and down.

[0022] In some embodiments, a cooling conveying zone is also included, which is connected to one side of the furnace exit lifting and translation machine. The cooling conveying zone includes a fourth rail, on which a cooling zone chain conveying mechanism is provided. A plurality of fifth hook-type propulsion components are evenly distributed at intervals on the conveying chain of the cooling zone chain conveying mechanism.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. First, a buffer zone chain conveyor is set up between the chain conveyor mechanism of the powder spraying booth and the chain conveyor mechanism of the curing oven. The sprayed workpieces are sequentially transported by the trolley into the front chain conveyor mechanism and the rear chain conveyor mechanism. Since the front chain conveyor mechanism is equipped with a flexible propulsion component, when the rear chain conveyor mechanism is stopped, the flexible propulsion component can also follow the conveyor chain of the front chain conveyor mechanism to transport the sprayed workpieces. This buffers the sprayed workpieces. Finally, the rear chain conveyor mechanism sends the workpieces on the trolley into the oven lifting and translation machine. This ensures that there is no empty workstation when entering the curing oven, and that the trolley does not stop in the spray booth, thereby improving production efficiency and realizing automated production.

[0025] 2. The curing oven is fixed in place by a support frame, positioning it at a high level. The coated workpiece is then lifted to the oven's entrance by an inlet lifting and translation machine. A chain conveyor in the lifting section drives a trolley into the second track inside the curing oven. The oven's chain conveyor then transports the trolley into the curing oven for curing, ensuring the workpiece is cured at the highest temperature for optimal results. Finally, the cured workpiece is transported to an outlet lifting and translation machine, which then lowers it to complete the paint curing process. This inlet and outlet lifting and translation machine design allows for the transport of heavy workpieces, solving the major problem of heavy workpieces not being able to be cured at the top of the oven.

[0026] 3. By using the flexible propulsion component and the hook-type propulsion component, the transport trolley can be transported between two adjacent chain conveyor mechanisms without manual operation or auxiliary mechanisms, thus greatly improving production efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the powder coating production system of the present invention;

[0028] Figure 2 This is a three-dimensional schematic diagram of the chain conveyor mechanism for the buffer area of ​​the present invention;

[0029] Figure 3 This is a three-dimensional schematic diagram of the elastic propulsion component of the present invention;

[0030] Figure 4 This is a cross-sectional schematic diagram of the elastic propulsion component of the present invention;

[0031] Figure 5 This is an exploded view of the elastic propulsion component of the present invention;

[0032] Figure 6 This is a schematic diagram showing the rear end of the first pusher of the present invention tilted upwards;

[0033] Figure 7 This is a schematic diagram of the rear end of the first pusher of the present invention after being pressed down;

[0034] Figure 8 This is a schematic diagram of the stopping mechanism of the present invention in the stopping state;

[0035] Figure 9 This is a schematic diagram of the stop mechanism of the present invention in a separated state;

[0036] Figure 10 This is a three-dimensional schematic diagram of the hook-type propulsion assembly of the present invention;

[0037] Figure 11 This is a cross-sectional schematic diagram of the hook-type propulsion assembly of the present invention;

[0038] Figure 12 This is a schematic diagram of the locking hook propulsion assembly of the present invention in conjunction with the transport vehicle;

[0039] Figure 13 This is a schematic diagram of the lifting platform of the present invention when it is not lifted;

[0040] Figure 14 This is a schematic diagram of the lifting platform of the present invention during lifting;

[0041] Figure 15 This is a schematic diagram of the material feeding detection mechanism of the present invention;

[0042] Figure 16 This is a schematic diagram of the material discharge detection mechanism of the present invention;

[0043] Figure 17 For the present invention Figure 14 Enlarged view of point A;

[0044] Figure 18 For the present invention Figure 16 Enlarged diagram of point B. Detailed Implementation

[0045] The following detailed description provides various embodiments or examples for carrying out the present invention. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0046] The invention will be further described below with reference to the figures and specific embodiments: Figures 1-18 The illustrated accumulation-type ground rail conveyor powder coating production system includes a conveyor system, a pre-coating treatment area 1, a powder spraying chamber 2, a buffer area 3, an inlet lifting and translating machine 11, a curing oven 4, an outlet lifting and translating machine 12, and a cooling conveyor area 91 arranged sequentially along the conveying direction of the conveyor system. The curing oven 4 is supported and fixed upwards by a support frame 5. The conveyor system includes a first track 6, a second track, a powder spraying chamber chain conveyor mechanism 8, a buffer area chain conveyor mechanism 9, and a curing oven chain conveyor mechanism.

[0047] Of course, in order to facilitate the transport of heavy and long workpieces, the conveyor system can be set up in two parallel sets, with the workpieces placed in the parallel transport trolleys 100.

[0048] The first track 6 is used for the movement of the transport trolley 100 and is located in the pre-painting treatment area 1, the powder spraying room 2, and the buffer area 3.

[0049] The second track is used for the movement of the transport trolley 100 and is located inside the curing oven 4;

[0050] The powder spraying booth chain conveyor mechanism 8 is located inside the powder spraying booth 2, and includes a number of first hook-type propulsion components 13 that are evenly distributed on the conveyor chain at intervals to propel the transport trolley 100 forward.

[0051] The buffer area chain conveyor mechanism 9 includes a front chain conveyor mechanism 14 and a rear chain conveyor mechanism 10. Elastic propulsion components 15 are evenly distributed at intervals on the conveyor chain of the front chain conveyor mechanism 14, and second hook propulsion components 16 are evenly distributed at intervals on the conveyor chain of the rear chain conveyor mechanism 10.

[0052] The curing oven chain conveyor mechanism is located inside the curing oven 4, and includes several third hook-type propulsion components 133 that are evenly distributed on the conveyor chain at intervals to propel the transport trolley 100 forward.

[0053] The furnace entry lifting and translation machine 11 and the furnace exit lifting and translation machine 12 are respectively located at the inlet end and the outlet end of the curing furnace 4. The furnace entry lifting and translation machine 11 and the furnace exit lifting and translation machine 12 have the same structure, including a lifting platform 17 for vertical lifting. A third track 18, a lifting section chain conveying mechanism 19, and a fourth hook-type propulsion component 20 are provided on the lifting platform 17.

[0054] The cooling conveying zone 91 is connected to one side of the furnace lifting and translation machine 12. The cooling conveying zone 91 includes a fourth rail 92, on which a cooling zone chain conveying mechanism is provided. Several fifth hook-type propulsion components 93 are evenly distributed at intervals on the conveying chain of the cooling zone chain conveying mechanism.

[0055] The specific workflow of this conveyor powder coating production system is as follows:

[0056] 1) Place the workpiece on the transport trolley 100 and first enter the pre-coating treatment area for puttying, putty curing, putty finishing, finishing putty curing, and putty surface sanding, etc.

[0057] 2) Then it enters the spray booth 2, where the first hook-type propulsion component 13 on the powder spraying booth chain conveyor mechanism 8 pushes the transport trolley 100 forward, and automatic and manual spraying are carried out in the spray booth 2.

[0058] 3) The coated workpiece enters the buffer zone chain conveyor mechanism 9. The front chain conveyor mechanism 14 in the buffer zone chain conveyor mechanism 9 buffers the transport trolley. Finally, the rear chain conveyor mechanism 10 transports the transport trolley 100 to the furnace lifting and translation machine 11.

[0059] 4) The transport trolley 100 is lifted upward by the furnace lifting and translation machine 11, and the third rail 18 on the lifting platform 17 is connected to the second rail in the curing furnace 4. The lifting section chain conveyor 19 transports the transport trolley 100 to the second rail, and the transport trolley 100 enters the curing furnace 4.

[0060] 5) The cured workpiece enters the furnace lifting and translation machine 12, and the furnace lifting and translation machine 12 transports the transport trolley 100 downwards, and finally enters the cooling transport area 91 for cooling.

[0061] According to the above structure, firstly, a buffer zone chain conveyor mechanism 9 is set between the powder spraying booth chain conveyor mechanism 8 and the curing oven chain conveyor mechanism. The sprayed workpieces are sequentially transported by the trolley 100 into the front chain conveyor mechanism 14 and the rear chain conveyor mechanism 10. Since the front chain conveyor mechanism 14 is equipped with an elastic propulsion component 15, when the rear chain conveyor mechanism 10 is stopped, the elastic propulsion component 15 can also follow the conveyor chain of the front chain conveyor mechanism 14 to transport the sprayed workpieces, which can buffer the sprayed workpieces. Finally, the workpieces on the trolley are sent into the furnace lifting and translation machine 11 by the rear chain conveyor mechanism 10, ensuring that there is no empty workstation when entering the curing oven 4, and that the trolley does not stop in the spray booth 2, thereby improving the production efficiency and realizing automated production.

[0062] In addition, the curing oven 4 is fixed by the support frame 5, so that the curing oven 4 is in a high position. Then, the painted workpiece is lifted to the entrance end of the curing oven 4 by the inlet lifting and translation machine 11. The lifting section chain conveyor mechanism 19 drives the transport trolley 100 into the second track inside the curing oven 4. Then, the curing oven chain conveyor mechanism drives the transport trolley to be transported to the curing oven 4 for curing, so that the workpiece can be at the highest temperature to achieve the best curing effect. Finally, the cured workpiece is transported to the outlet lifting and translation machine 12, and finally the cured workpiece is transported down by the outlet lifting and translation machine 12 to achieve paint curing.

[0063] By using the flexible propulsion assembly 15 and the hook-type propulsion assemblies (i.e., the first hook-type propulsion assembly 13, the first hook-type propulsion assembly 16, the third hook-type propulsion assembly 133, the fourth hook-type propulsion assembly 20, and the fifth hook-type propulsion assembly 93), the transport trolley can be transported between two adjacent chain conveyor mechanisms without manual operation or auxiliary mechanisms, thus greatly improving production efficiency.

[0064] See Figures 3-7 As shown, the elastic propulsion assembly 15 includes a base plate seat 21 fixed on the conveyor chain. A first pusher head 22 is hinged to the base plate seat 21 and swings back and forth. The first pusher head 22 includes a hinge portion 23 and a front end portion 25 and a rear end portion 26 located at the front and rear ends of the hinge portion 23. The upper end of the rear end portion 26 is provided with an upwardly extending pushing portion 29, and the lower end is connected to the base plate seat 21 by a first compression spring 27. The first compression spring 27 provides elastic force to keep the rear end portion 26 tilted upward and the front end portion 25 pressed downward against the base plate seat 21. When the rear end portion 26 is tilted upward, the pushing portion 29 can push the transport trolley 100 forward.

[0065] In other words, when the elastic force of the first compression spring 27 is greater than the weight of the transport trolley and the workpiece, the connecting column 101 of the transport trolley can be pushed forward by the rear end 26 and the pushing part 29 on the first push head 22 (e.g., Figure 6 (As shown); if an external object restricts the forward movement of the transport trolley, the stop mechanism 30 contacts the transport trolley 100, thereby restricting the movement of the transport trolley 100. The connecting column 101 of the transport trolley is restricted and does not move. At this time, the first compression spring 27 is compressed, the rear end 26 and the pushing part 29 are pressed down, and the first push head 22 continues to move with the conveying chain of the front chain conveying mechanism 14 (as shown). Figure 7 As shown), the first pusher 22 finally separates from the connecting column 101 of the transport trolley 100, thereby achieving automatic separation and preventing the transport trolley 100 from moving with the conveyor chain, thus providing buffering.

[0066] See Figures 8-9 As shown, a stop mechanism 30 is also provided on the front chain conveyor mechanism 14. The stop mechanism 30 is movably configured and includes a stop mode or a separation mode. In the stop mode, it can contact the transport trolley 100 to restrict the movement of the transport trolley 100. In the separation mode, it can remain separated from the transport trolley 100 and not contact it. When the stop mechanism 30 is in the stop mode, the moving elastic propulsion component 15 can be compressed by the stopped transport trolley 100 and then disengage from the transport trolley 100.

[0067] Furthermore, the stopping mechanism 30 includes a mounting plate 41, on which a mounting seat 42 is provided. A swing seat 43 is hinged to one side of the mounting seat 42. A stop seat 44 for restricting the forward movement of the transport trolley 100 is provided on the swing seat 43. A cylinder 45 is provided on the side of the mounting seat 42 opposite to the swing seat 43. A roller 46 is provided on the piston rod of the cylinder 45. A protrusion 47 and a recess 48 are provided at the lower end of the swing seat 43. The protrusion 47 and the recess 48 are transitioned by an arc. The swing seat 43 uses its own weight to make the protrusion 47 or the recess 48 abut against the roller 46. When the protrusion 47 abuts against the roller 46, the stopping mechanism 30 is in a stopped state. When the recess 48 abuts against the roller 46, the stopping mechanism 30 is in a separated state.

[0068] When it is necessary to buffer the 100 transport vehicles, i.e., from Figure 9 Switching to Figure 8 In operation, the piston rod on the cylinder 45 drives the roller 46 to extend outward. At this time, the roller 46 moves from the recessed part 48 to the protruding part 47, thereby causing the swing seat 43 to swing and drive the stop seat 44 on the swing seat 43 to extend upward. At this time, the stop seat 44 can restrict the forward movement of the transport trolley 100. Similarly, when the transport trolley 100 is released, the cylinder 45 drives the roller 46 to retract inward.

[0069] See Figures 10-12 As shown, the first hook-type propulsion assembly 13, the second hook-type propulsion assembly 16, the third hook-type propulsion assembly 133, the fourth hook-type propulsion assembly 20, and the fifth hook-type propulsion assembly 93 have the same structure. Each of them includes a hook seat 61 fixed on the conveyor chain. The hook seat 61 is composed of a bottom 62 fixed to the chain and a head 63 and a tail 64 extending from both ends of the bottom. The bottom 62, the head 63, and the tail 64 are integrally formed and are U-shaped. A second push head 65 is hinged to the tail 64. A second compression spring 66 is connected to the bottom 62. The upper end of the second compression spring 66 presses against the inner bottom surface of the second push head 65 to keep the second push head 65 in shape. A gap space 67 is formed between the end of the second push head 65 and the head 63 of the hook seat 61. Under the action of the second compression spring 66, the second push head 65 forms an upward slope angle towards the end of the head 63.

[0070] When the trolley 100 needs to move, power needs to be introduced. The chain conveyor mechanism drives the conveyor chain for transmission, and the conveyor chain drives the locking hook seat 61 to move together. When the upper end of the second push head 65 contacts the connecting post 101 of the trolley 100, the second push head 65 is pushed down by the connecting post 101. When the second push head 65 is disengaged from the connecting post 101, the second push head 65 bounces up and resets under the action of the second compression spring 66. At this time, the connecting post 101 is in the space 67 formed between the end of the second push head 65 and the head 63 of the locking hook seat 61. Thus, when the locking hook seat 61 moves with the conveyor chain, the head 63 of the locking hook seat 61 pushes the connecting post 101 to drive the trolley 100 forward.

[0071] See Figure 13 , Figure 14 As shown, the furnace inlet lifting and translation machine 11 and the furnace outlet lifting and translation machine 12 have the same structure, both including a vertical lifting guide rail 81, a crossbeam 82 connected to the upper end of the two vertical lifting guide rails 81, a lifting platform 17 that is movably arranged between the two vertical lifting guide rails 81, and a chain lifting device 83 that drives the lifting platform 17 to move up and down. It should be noted that the vertical lifting guide rail 81, crossbeam 82, and chain lifting device 83 are all existing conventional settings, and will not be described in detail here.

[0072] When the lifting platform 17 in the furnace lifting and translation machine 11 is not lifted, the third rail 18 on the lifting platform 17 is connected to the first rail 6. When the lifting platform 17 is lifted, the third rail 18 is connected to the second rail.

[0073] See Figures 13-18 As shown, the furnace lifting and translation machine 11 is equipped with a feeding detection mechanism and a discharging detection mechanism. The feeding detection mechanism is used to detect whether the transport trolley 100 has entered the third track 18, and the discharging detection mechanism is used to detect whether the transport trolley 100 has moved out of the third track 18. A detection rod 50 is provided on the outside of the fourth hook-type propulsion assembly 20 to cooperate with the feeding detection mechanism and the discharging detection mechanism for detection.

[0074] See Figure 15As shown, the feeding detection mechanism includes a first vertical profile 51, on which a feeding detection photoelectric probe 52 is provided. When the transport trolley 100 enters the third track 18, the end of the detection rod 50 on the fourth hook-type propulsion assembly 20 passes through the probe portion of the feeding detection photoelectric probe 52. When the fourth hook-type propulsion assembly 20 follows the chain upward and simultaneously connects the transport trolley 100 (i.e., the connecting column 101 is inserted into the interval space 67), the end of the detection rod 50 on the fourth hook-type propulsion assembly 20 passes through the probe portion of the feeding detection photoelectric probe 52. Thus, by passing through the fourth hook-type propulsion assembly 20, the transport trolley 100 is assumed to enter the third track 18.

[0075] See Figure 16 , Figure 18 As shown, the discharge detection mechanism includes a second vertical profile 71. An upper support 72 is provided at the upper end of the second vertical profile 71. A first swing seat is sway-hinged on the upper support plate 72. The first swing seat includes a first swing part 73 rotatably disposed on one side of the upper support plate 72, and extension parts 74 and pressing parts 75 disposed on the front and rear sides of the first swing part 73. An extension rod 79 is hinged to the extension part 74. A lower support is provided at the lower end of the second vertical profile 71. 76. A guide hole 77 is provided at the upper end of the lower support plate 76. The lower end of the extension rod 79 is guided vertically within the guide hole 77. A discharge detection photoelectric probe 78 is provided on one side of the lower support 76. When the transport trolley 100 moves out of the third track 18, the detection rod 50 on the fourth hook-type propulsion assembly 20 can press the pressing part 75 and drive the extension rod 79 to move upward through the extension part 74, so that the lower end of the extension rod 79 disengages from the probe part of the discharge detection photoelectric probe 78.

[0076] When the fourth hook-type propulsion assembly 20 is conveyed to the end by the chain, the transport trolley 100 enters the curing oven 4. At the same time, the detection rod 50 on the fourth hook-type propulsion assembly 20 can press the abutment part 75, causing its extension part 74 to drive the extension rod 79 to move upward. When the extension rod 79 moves upward, its lower end disengages from the probe part of the discharge detection photoelectric probe 78, thereby defaulting to the transport trolley 100 moving out of the third track 18 and entering the second track of the curing oven 4.

[0077] It is worth mentioning that, since the opening of the curing oven 4 is at a high temperature, the discharge detection photoelectric probe 78 is placed at the bottom, which can avoid the high temperature at the opening of the curing oven and ensure that the discharge detection photoelectric probe 78 can work normally.

[0078] See Figure 14 , Figure 17As shown, a positioning mechanism is also provided on the vertical lifting guide rail 81, which is used to position the lifting platform 17 in the lifted position.

[0079] Furthermore, the positioning mechanism includes a cylinder 191 mounted on the vertical lifting guide rail 81, a connecting rod 192 connected to the piston rod of the cylinder 191, and a second swing seat mounted on the vertical lifting guide rail 81. The second swing seat includes a second swing part 193 rotatably mounted on the vertical lifting guide rail 81. A connecting part 194 and a support part 195 are mounted on the left and right sides of the second swing part 193. The upper end of the connecting rod 192 is hinged to the connecting part 194. A limiting support block 196 is mounted on the vertical lifting guide rail 81 and located below the support part 195. When the support part 195 abuts against the limiting support block 196, the support part 195 swings horizontally inward. At this time, the bottom end of the lifting platform 17 can support and abut against the support part 195.

[0080] When the lifting platform 17 is lifted upward, the cylinder 191 drives the connecting rod 192 to extend upward. Then, the upward swing of the connecting part 194 drives the support part 195 to swing downward and abut against the limiting support block 196. As a result, the lifting platform 17 moves downward and abuts against the support part 195, thereby positioning the lifting platform 17 so that the third track 18 on the lifting platform 17 is connected with the second track in the curing oven 4.

[0081] Based on the accompanying drawings and the foregoing illustrations and descriptions, the basic principles and main features of the present invention, as well as its advantages, those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder spray coating production system of the accumulation type, characterized in that it comprises: It includes a conveyor system, a pre-coating treatment area (1), a powder spraying room (2), a buffer area (3), an inlet lifting and translation machine (11), a curing oven (4), and an outlet lifting and translation machine (12) arranged sequentially along the conveying direction of the conveyor system. The curing oven (4) is supported and fixed upward by a support frame (5). The conveyor system includes a first track (6), a second track, a powder spraying room chain conveyor mechanism (8), a buffer area chain conveyor mechanism (9), and a curing oven chain conveyor mechanism. The first track (6) is used for the movement of the transport trolley (100) and is located in the pre-painting treatment area (1), the powder spraying room (2), and the buffer area (3); The second track is used for the movement of the transport trolley (100) and is located inside the curing oven (4); The powder spraying room chain conveyor mechanism (8) is located inside the powder spraying room (2), which includes several first hook-type propulsion components (13) that are evenly distributed on the conveyor chain to propel the transport trolley (100) forward. The buffer area chain conveyor mechanism (9) includes a front chain conveyor mechanism (14) and a rear chain conveyor mechanism (10). Elastic propulsion components (15) are evenly distributed at intervals on the conveyor chain of the front chain conveyor mechanism (14), and second hook propulsion components (16) are evenly distributed at intervals on the conveyor chain of the rear chain conveyor mechanism (10). The curing oven chain conveyor mechanism is located inside the curing oven (4), which includes several third hook-type propulsion components (133) that are evenly distributed on the conveyor chain at intervals to propel the transport trolley (100) forward. The furnace entry lifting and translation machine (11) and the furnace exit lifting and translation machine (12) are respectively located at the inlet end and the outlet end of the curing furnace (4). The furnace entry lifting and translation machine (11) and the furnace exit lifting and translation machine (12) have the same structure. Both include a lifting platform (17) that can be lifted up and down. A third track (18), a lifting section chain conveying mechanism (19), and a fourth hook-type propulsion component (20) are provided on the lifting platform (17). The elastic propulsion assembly (15) includes a base plate seat (21) fixed on the conveyor chain. A first push head (22) is hinged on the base plate seat (21) to swing back and forth. The first push head (22) includes a hinge part (23) and a front end part (25) and a rear end part (26) provided at the front and rear ends of the hinge part (23). The upper end of the rear end part (26) is provided with an upwardly extending push part (29), and the lower end is connected to the base plate seat (21) with a first compression spring (27). The first compression spring (27) provides elastic force to keep the rear end part (26) tilted upward and the front end part (25) pressed downward against the base plate seat (21). When the rear end part (26) is tilted upward, the push part (29) can push the transport trolley (100) forward. The first hook-type propulsion assembly (13), the second hook-type propulsion assembly (16), the third hook-type propulsion assembly (133), and the fourth hook-type propulsion assembly (20) have the same structure, each including a hook seat (61) fixed on the conveyor chain. The hook seat (61) consists of a bottom (62) fixed to the chain and a head (63) and a tail (64) extending from both ends of the bottom. The bottom (62), head (63), and tail (64) are integrally formed and U-shaped. A second push head (65) is hinged to the bottom (62), and a second compression spring (66) is connected to the bottom (62). The upper end of the second compression spring (66) presses against the inner bottom surface of the second push head (65) to keep the second push head (65) in shape. A gap space (67) is formed between the end of the second push head (65) and the head (63) of the lock hook seat (61). Under the action of the second compression spring (66), the second push head (65) forms an upward slope angle towards the end of the head (63).

2. The carousel-type floor track conveyor powder spraying coating production system according to claim 1, characterized in that: A stop mechanism (30) is also provided on the front chain conveyor mechanism (14). The stop mechanism (30) is movably configured and includes a stop mode or a separation mode. In the stop mode, it can contact the transport trolley (100) to restrict the movement of the transport trolley (100). In the separation mode, it can keep separated from the transport trolley (100) and not contact it. When the stop mechanism (30) is in the stop mode, the moving elastic propulsion component (15) can be compressed by the stopped transport trolley (100) and then detach from the transport trolley (100).

3. The powder spraying and coating production system of the accumulation type ground rail conveying according to claim 2, characterized in that: The stop mechanism (30) includes a mounting plate (41), on which a mounting seat (42) is provided. A swing seat (43) is hinged to one side of the mounting seat (42). A stop seat (44) for restricting the forward movement of the transport trolley (100) is provided on the swing seat (43). A cylinder (45) is provided on the side of the mounting seat (42) opposite to the swing seat (43). A roller (46) is provided on the piston rod of the cylinder (45). The lower end of the movable seat (43) is provided with a protrusion (47) and a recess (48). The protrusion (47) and the recess (48) are connected by an arc. The swing seat (43) uses its own weight to make the protrusion (47) or the recess (48) abut against the roller (46). When the protrusion (47) abuts against the roller (46), the stop mechanism (30) is in a stop state. When the recess (48) abuts against the roller (46), the stop mechanism (30) is in a separated state.

4. The accumulation-type ground rail conveying powder coating production system according to claim 1, characterized in that: The furnace lifting and translation machine (11) is equipped with a feeding detection mechanism and a discharging detection mechanism. The feeding detection mechanism is used to detect whether the transport trolley (100) enters the third track (18), and the discharging detection mechanism is used to detect whether the transport trolley (100) moves out of the third track (18). A detection rod (50) is provided on the outside of the fourth hook-type propulsion assembly (20) to cooperate with the feeding detection mechanism and the discharging detection mechanism for detection.

5. The accumulation-type ground rail conveying powder coating production system according to claim 4, characterized in that: The feeding detection mechanism includes a first vertical profile (51), on which a feeding detection photoelectric probe (52) is provided. When the transport trolley (100) enters the third track (18), the end of the detection rod (50) on the fourth hook-type propulsion assembly (20) passes through the probe part of the feeding detection photoelectric probe (52).

6. The accumulation-type ground rail conveying powder coating production system according to claim 4, characterized in that: The discharge detection mechanism includes a second vertical profile (71), an upper support (72) is provided at the upper end of the second vertical profile (71), a first swing seat is sway-hinged on the upper support (72), the first swing seat includes a first swing part (73) rotatably disposed on one side of the upper support (72) and an extension part (74) and a pressing part (75) disposed on the front and rear sides of the first swing part (73), an extension rod (79) is hinged on the extension part (74), and a lower support (76) is provided at the lower end of the second vertical profile (71). A guide hole (77) is provided at the upper end of the lower support member (76), and the lower end of the extension rod (79) is guided vertically within the guide hole (77). A discharge detection photoelectric probe (78) is provided on one side of the lower support member (76). When the transport trolley (100) moves out of the third track (18), the detection rod (50) on the fourth hook-type propulsion assembly (20) can press the pressing part (75) and drive the extension rod (79) to move upward through the extension part (74), so that the lower end of the extension rod (79) disengages from the probe part of the discharge detection photoelectric probe (78).

7. The accumulation-type ground rail conveying powder coating production system according to claim 1, characterized in that: The furnace entry lifting and translation machine (11) and the furnace exit lifting and translation machine (12) have the same structure, both including a vertical lifting guide rail (81), a crossbeam (82) connected to the upper end of the two vertical lifting guide rails (81), a lifting platform (17) that moves up and down between the two vertical lifting guide rails (81), and a chain lifting device (83) that drives the lifting platform (17) to move up and down.

8. The accumulation-type ground rail conveying powder coating production system according to claim 7, characterized in that: It also includes a cooling conveying area (91), which is connected to one side of the furnace lifting and translating machine (12). The cooling conveying area (91) includes a fourth track (92), on which a cooling zone chain conveying mechanism is provided. Several fifth hook-type propulsion components (93) are evenly distributed at intervals on the conveying chain of the cooling zone chain conveying mechanism.

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