A U-shaped pipe production device

Abstract

The present invention discloses a U-shaped elbow production device, which includes a flipping mechanism and a pipe bending mechanism, a powder coating mechanism, and a drying mechanism that are connected in sequence. Two sets of the flipping mechanisms are provided between the pipe bending mechanism and the powder coating mechanism, and a transfer channel is provided between the two sets of the flipping mechanisms. The U-shaped elbows are hung downward with their openings on the transfer channel for conveying. One set of the flipping mechanisms is provided between the powder coating mechanism and the drying mechanism. The flipping mechanism includes: a fixture structure for gripping the U-shaped elbows; a flipping structure connected to the fixture structure for driving the fixture structure to flip so as to change the opening orientation of the U-shaped elbows and perform transfer. The U-shaped elbow production device of the present invention can realize the automatic transfer of the U-shaped elbows between the processing devices, realize continuous production, effectively improve the production efficiency, and reduce the labor cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy-saving lamp production, and particularly relates to a U-shaped bent pipe production device. Background Art

[0002] The production of U-shaped energy-saving lamp tubes mainly includes three processes: pipe bending, powder coating, and baking, which are respectively completed by a pipe bending device, a powder coating device, and a drying device. At present, the transfer of U-shaped bent pipes between these three devices is mainly completed by manual handling, which consumes a large amount of manpower and time during the handling process, and the production efficiency is greatly affected.

[0003] Therefore, the existing technology needs to be improved and developed. Summary of the Invention

[0004] The present invention provides a U-shaped bent pipe production device, which can realize the automatic transfer of U-shaped bent pipes between processing devices, achieve continuous production, effectively improve production efficiency, and reduce labor costs.

[0005] To solve its technical problems, a U-shaped bent pipe production device provided by the present invention includes a flipping mechanism and a pipe bending mechanism, a powder coating mechanism, and a drying mechanism connected in sequence. Two groups of the flipping mechanisms are provided between the pipe bending mechanism and the powder coating mechanism, and a transfer channel is provided between the two groups of the flipping mechanisms. The U-shaped bent pipe is hung downward with its opening and conveyed on the transfer channel. One group of the flipping mechanisms is provided between the powder coating mechanism and the drying mechanism. The flipping mechanism includes:

[0006] A fixture structure for grasping the U-shaped bent pipe;

[0007] A flipping structure connected to the fixture structure for driving the fixture structure to flip so as to change the opening direction of the U-shaped bent pipe and transfer it.

[0008] Further, the above flipping structure includes an execution component and a first power component. The execution component includes a flipping arm in a shape similar to the letter Z, a flipping guide rail, and a driving guide rail. The flipping guide rail and the driving guide rail are arranged in parallel. One end of the horizontal arm a of the flipping arm in the shape similar to the letter Z is connected to the driving guide rail through a rotating seat and can rotate relative to the rotating seat. The other end of the horizontal arm b of the flipping arm in the shape similar to the letter Z is slidably connected to the flipping guide rail. A flipping groove is provided in the middle of the flipping guide rail for receiving the horizontal arm b to enable the flipping arm in the shape similar to the letter Z to swing. The horizontal arm a is connected to the clamping structure to drive the clamping structure to flip. The first power component is connected to the rotating seat to drive the flipping arm in the shape similar to the letter Z to reciprocate along the flipping guide rail and the driving guide rail.

[0009] Further, the above-mentioned fixture mechanism includes a clamping cylinder, a clamping tension spring, a first swing arm and a second swing arm; a first gear and a second gear are respectively connected to the first swing arm and the second swing arm, and the first gear and the second gear are meshed; one ends of the first swing arm and the second swing arm are respectively connected with a first glass tube clamp and a second glass tube clamp, and the first glass tube clamp and the second glass tube clamp are arranged oppositely to clamp the U-shaped bent tube; the clamping cylinder and the clamping tension spring are arranged between the first swing arm and the second swing arm, and the clamping cylinder makes a telescopic movement between the first swing arm and the second swing arm to drive the first swing arm and the second swing arm to swing towards / away from each other with the first gear and the second gear as fulcrums respectively, and the clamping tension spring is used to provide a reset pulling force.

[0010] Further, the above-mentioned transfer channel is inclined along the conveying direction of the U-shaped bent tube, and it includes a gentle conveying section and an inclined conveying section. The slope of the inclined conveying section is greater than that of the gentle conveying section. A blocking portion is provided at the end of the inclined conveying section, and a blocking member is provided above the end of the inclined conveying section.

[0011] Further, the above-mentioned powdering mechanism includes a second turntable structure and a powdering structure. The powdering structure includes a powder injection nozzle, a powder injection hose and a first control structure. The powder injection nozzle is used to inject fluorescent powder into the U-shaped bent tube. One end of the powder injection hose is connected to the powder injection nozzle, and the other end is connected to a storage device of the fluorescent powder. The storage device is provided with a powder injection driving structure for conveying the fluorescent powder to the powder injection nozzle. The first control structure is arranged corresponding to the powder injection hose and is used to control the powder injection hose to be in a through or closed state; the second turntable structure is rotatably arranged and is used to sequentially convey the U-shaped bent tube from the second loading station to the powdering station and the second unloading station. The powdering structure is arranged corresponding to the powdering station, and a set of the above-mentioned flipping mechanisms are respectively provided at the second loading station and the second unloading station.

[0012] Further, the above-mentioned drying mechanism includes a conveying chain, a positioning structure and a third loading station. A plurality of hooks for hanging the U-shaped bent tube are distributed on the conveying chain. The third loading station is arranged corresponding to the corresponding flipping mechanism, and the positioning structure is arranged adjacent to the third loading station and is used to position the hooks on the third loading station relative to the flipping mechanism.

[0013] Further, the above-mentioned elbow pipe mechanism includes an upper pipe structure, a flame spraying head structure, an elbow pipe structure, and a first turntable structure. The elbow pipe structure is arranged between the upper pipe structure and the first turntable structure. The flame spraying head structure is arranged below the upper pipe structure. The elbow pipe structure includes a bending execution component and a cam driving component. The bending execution component includes: a clamping arm structure and a transmission connecting piece. The clamping arm structure includes a first clamping arm structure and a second clamping arm structure arranged oppositely. The first clamping arm structure and the second clamping arm structure are respectively connected with a flipping swing arm. One ends of the two flipping swing arms are rotatably arranged and are respectively connected with a driving gear and a driven gear. The driving gear meshes with the driven gear. The transmission connecting piece includes a gear transmission part and a transmission swing arm. The gear transmission part is rotatably arranged and is connected with the driving gear. The transmission swing arm swings up and down to drive the gear transmission part to rotate. The first turntable structure is rotatably arranged and is used for conveying the U-shaped elbow pipe from the first loading station to the first unloading station. The first loading station is arranged corresponding to the elbow pipe structure. A set of the flipping mechanisms is arranged at the first unloading station.

[0014] Further, the above-mentioned upper pipe structure includes a storage tank, a loading channel, and a conveying channel. The storage tank is located below the conveying channel and is used for storing straight glass pipes. The conveying channel is used for conveying the straight glass pipes to the flame spraying head structure. The loading channel obliquely penetrates through the storage tank from bottom to top and its upper end is docked with the conveying channel. The loading channel includes a circulating and rotating loading conveyor chain. Loading grooves are distributed on the loading conveyor chain. The loading grooves are used for hooking the straight glass pipes to perform loading following the rotation of the loading conveyor chain.

[0015] Further, two groups of upper pipe structures are arranged on the outer side of the first turntable structure. Two groups of the elbow pipe structures and two groups of the flame spraying head structures are respectively arranged corresponding to the two groups of upper pipe structures. Two sets of clamping structures are respectively arranged corresponding to each group of the flipping mechanisms. Two transfer channels are arranged in parallel and are respectively corresponding to the two sets of clamping structures. Two powder spraying structures are arranged at the powder spraying station. Two positioning structures are arranged at the third loading station. The two positioning structures are respectively corresponding to the two sets of clamping structures.

[0016] Furthermore, the above-mentioned elbow pipe mechanism further includes a pipe clamping structure, which is arranged between the elbow pipe structure and the flipping mechanism along the rotation direction of the first turntable. It includes a die structure, a die opening and clamping member, a die opening cam structure, and a fourth reset tension spring; the die structure includes a first die structure and a second die structure that are arranged to open and close relatively in the horizontal direction; the die opening and clamping member is arranged between the first die structure and the second die structure and is in close contact with the first die structure and the second die structure, and is used to reciprocate relative to the die structure to open the die; the die opening cam structure is connected to the die opening and clamping member and is used to drive the die opening and clamping member to reciprocate; both ends of the fourth reset tension spring are respectively connected to the first die structure and the second die structure and are used to provide a pulling force to drive the die structure to close the die.

[0017] The U-shaped elbow pipe production equipment of the present invention is connected to the elbow pipe mechanism, the powder coating mechanism, and the drying mechanism through the transfer channel and / or the flipping mechanism, realizes the automatic transfer of the U-shaped elbow pipe between adjacent workstations, realizes continuous production, replaces manual handling, effectively improves production efficiency, and reduces labor costs. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the flipping mechanism of a U-shaped elbow pipe production equipment of the present invention.

[0019] Figure 2 It is Figure 1 a schematic structural diagram of another embodiment of the flipping mechanism shown.

[0020] Figure 3 It is Figure 1 a schematic structural diagram of the fixture structure of the flipping mechanism shown.

[0021] Figure 4 It is a schematic structural diagram of the transfer channel of a U-shaped elbow pipe production equipment of the present invention.

[0022] Figure 5 It is a schematic structural diagram of the powder coating mechanism of a U-shaped elbow pipe production equipment of the present invention.

[0023] Figure 6 It is Figure 8 a schematic structural diagram of the powder coating structure of the powder coating mechanism shown.

[0024] Figure 7 It is Figure 5 a schematic structural diagram of the second clamping structure of the powder coating mechanism shown.

[0025] Figure 8 It is a schematic structural diagram of the drying mechanism of a U-shaped elbow pipe production equipment of the present invention.

[0026] Figure 9 is Figure 8 the partial enlarged view of the drying mechanism shown.

[0027] Figure 10 is the front view of the elbow structure of a U-shaped elbow production device of the present invention.

[0028] Figure 11 is the side view of the elbow structure of a U-shaped elbow production device of the present invention.

[0029] Figure 12 is Figure 11 another side view of the elbow structure shown.

[0030] Figure 13 is Figure 11 the structural schematic diagram of the clamping arm structure of the elbow structure shown.

[0031] Figure 14 is the structural schematic diagram of the upper pipe mechanism of a U-shaped elbow production device of the present invention.

[0032] Figure 15 is Figure 14 the partial enlarged view of the upper pipe mechanism shown.

[0033] Figure 16 is the structural schematic diagram of the pipe clamping structure of a U-shaped elbow production device of the present invention.

[0034] Figure 17 is Figure 16 the enlarged view at position A of the pipe clamping structure shown. Detailed implementation manners

[0035] The following details the implementation manners of the present invention. Examples of the implementation manners are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The implementation manners described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0039] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0040] As Figure 1 , 4 , 5, and 8 show, a U-shaped bend pipe production device of the present invention includes a flipping mechanism and a bend pipe mechanism, a powdering mechanism, and a drying mechanism that are connected in sequence. There are two groups of flipping mechanisms between the bend pipe mechanism and the powdering mechanism, and a transfer channel 600 is provided between the two groups of flipping mechanisms. The U-shaped bend pipe is hung with its opening facing down on the transfer channel 600 for transportation. There is a group of flipping mechanisms between the powdering mechanism and the drying mechanism. The flipping mechanism includes: a fixture structure 402 for grasping the U-shaped bend pipe; a flipping structure 401 connected to the fixture structure 402 for driving the fixture structure 402 to flip, so as to change the opening orientation of the U-shaped bend pipe and transfer it.

[0041] Specifically, the U-shaped bend pipe obtained by bending a glass straight pipe by the bend pipe mechanism is in a position state with its opening facing up in the bend pipe mechanism. In the next process of the powdering mechanism, it also needs to be in a position state with its opening facing up for powder injection (i.e., injecting fluorescent powder). After powder injection, the U-shaped bend pipe needs to pour out the excess fluorescent powder and enter the drying mechanism for pipe drying. According to the requirements of production conditions, in the production workshop, usually the bend pipe device and the powdering device are relatively far apart, while the powdering device and the drying device are relatively close. In specific applications, the U-shaped bend pipe in the bend pipe mechanism is flipped by the first group of flipping mechanisms, transferred to the transfer channel 600 in a position state with its opening facing down, transported to the second group of flipping mechanisms through the transfer channel 600, and finally flipped by the second group of flipping mechanisms again and enters the powdering mechanism in a position state with its opening facing up. The U-shaped bend pipe in the powdering mechanism is flipped by the third group of flipping mechanisms again, pours out the excess fluorescent powder with its opening facing down, and is transferred to the drying mechanism, thereby realizing the automatic transfer of the U-shaped bend pipe between adjacent workstations, realizing continuous production, replacing manual handling, and effectively improving production efficiency; between the bend pipe mechanism and the powdering mechanism, through the transfer channel 600, the U-shaped bend pipe is transported and transferred in a hanging manner. According to the specific shape of the U-shaped bend pipe, it can be stably placed and transported.

[0042] As Figure 1 , 2As shown, in some preferred embodiments, the above-mentioned flipping structure 401 includes an actuating member and a first power member 410. The actuating member includes a flipping arm 431 in a Z-like shape, a flipping guide rail 432, and a driving guide rail 433. The flipping guide rail 432 and the driving guide rail 433 are arranged in parallel. One cross arm a at one end of the Z-like flipping arm 431 is connected to the driving guide rail through a rotating seat 434 and can rotate relative to the rotating seat 434. The other cross arm b at the other end of the Z-like flipping arm 431 is slidably connected to the flipping guide rail 432. A flipping groove 435 is provided in the middle of the flipping guide rail 432. The flipping groove 435 is used to receive the cross arm b so that the Z-like flipping arm 431 swings. The cross arm a is connected to the fixture structure 402 to drive the flipping of the fixture structure. The first power member 410 is connected to the rotating seat 434 to drive the Z-like flipping arm 431 to reciprocate along the flipping guide rail 432 and the driving guide rail 433. As a more optimal solution, the cross arm b is provided with a rolling member 437. The rolling member 437 is rotatably connected to the cross arm b so that the cross arm b slides along the flipping guide rail 432 through the rolling member 437. The cross arm b is connected with a flipping tension spring 438. One end of the flipping tension spring 438 is fixedly arranged relative to the flipping guide rail 432.

[0043] Specifically, the rotating seat 434 slides along the driving guide rail 433 through a driving slider 436. Before the flipping starts, the cross arm b is in front of the cross arm a. The first power member 410 drives the cross arm a to slide forward along the driving guide rail 433 and simultaneously pushes the cross arm b to slide forward synchronously along the flipping guide rail 432. When the cross arm b passes through the flipping groove 435, it will fall into the flipping groove 435, causing the cross arm a to rotate to a certain extent relative to the rotating seat 434, and the flipping starts. The cross arm a continues to slide forward. Since the cross arm b is blocked by the flipping groove 435 and cannot slide forward synchronously with the cross arm a, the Z-like flipping arm 431 swings with the cross arm b as the fulcrum, thereby driving the flipping of the fixture structure 402. The cross arm a continues to slide forward until it is in front of the cross arm b, pulling the cross arm b back from the flipping groove 435 to the main body of the flipping guide rail 432, and the flipping is completed.

[0044] As Figure 1As shown, in some embodiments, the first power component 410 includes a first cam 411, a first L-shaped swing arm 412, a third L-shaped swing arm 413, and a movable connecting member 414. A swing fulcrum is provided at the bent portion of the first L-shaped swing arm 412 and the third L-shaped swing arm 413. A first roller 415 is provided on the short arm of the first L-shaped swing arm 412. The first roller 415 contacts the first cam 411 to cause the first L-shaped swing arm 412 to swing up and down. A first return spring 416 is connected to the long arm of the first L-shaped swing arm 412. The long arm of the first L-shaped swing arm 412 is hinged to the short arm of the third L-shaped swing arm 413 to drive the third L-shaped swing arm 413 to swing horizontally. The long arm of the third L-shaped swing arm 413 is movably connected to the movable connecting member 414, and the movable connecting member 414 is connected to the rotating seat 434 to drive the rotating seat 434 to perform reciprocating motion.

[0045] Specifically, the above-mentioned first cam 411 and first L-shaped swing arm 412 can be installed on the machine table of the equipment through a pedestal bearing structure, and one end of the first return spring 416 is fixed on the machine table. The long arm of the first L-shaped swing arm 412 is connected to the short arm of the third L-shaped swing arm 413 through a first connecting rod 417, and both ends of the first connecting rod 417 are also connected with spherical plain bearings. Further, the movable connecting member 414 is provided with a chute 418, and the long arm of the third L-shaped swing arm 413 is connected to the chute 418 through a bearing or a roller, so that when the third L-shaped swing arm 413 swings to drive the executing component to move horizontally, it can slide in the chute 418 to adapt to the height change caused by the up and down movement of the above-mentioned executing component.

[0046] As Figure 2 shown, in some other embodiments, the above-mentioned first power component 410 includes a tilting cylinder 451. The piston end of the tilting cylinder 451 is connected to the rotating seat 434 to drive the rotating seat 434 to perform reciprocating motion. In specific applications, the first power component 410 in the tilting mechanism between the pipe bending mechanism and the transfer channel 600 can adopt this structure.

[0047] In some embodiments, the above-mentioned first power component 410 further includes a buffer 452. The buffer 452 is provided at one end of the rotating seat 434 that is not connected to the tilting cylinder 451 and is used to provide a buffering effect for the movement of the rotating seat 434. Specifically, the buffer 452 can adopt an oil buffer.

[0048] As Figure 3As shown, specifically, the above-mentioned fixture structure 402 includes a clamping cylinder 411, a clamping tension spring 442, a first swing arm 443, and a second swing arm 444; the first swing arm 443 and the second swing arm 444 are respectively connected with a first gear 447 and a second gear 448, and the first gear 447 meshes with the second gear 448; one ends of the first swing arm 443 and the second swing arm 444 are respectively connected with a first glass tube clamp 445 and a second glass tube clamp 446, and the first glass tube clamp 445 and the second glass tube clamp 446 are arranged opposite to each other to clamp a U-shaped bend pipe; the clamping cylinder 441 and the clamping tension spring 442 are arranged between the first swing arm 443 and the second swing arm 444, and the clamping cylinder 441 makes a telescopic movement between the first swing arm 443 and the second swing arm 444 to drive the first swing arm 443 and the second swing arm 444 to swing towards / away from each other with the first gear 447 and the second gear 448 as fulcrums respectively, and the clamping tension spring 442 is used to provide a reset pulling force.

[0049] Specifically, the fixture structure 402 is fixedly connected with the cross arm a through a fixture mounting plate 449, and the first gear 447 and the second gear 448 are mounted on the fixture mounting plate 449 through a bearing structure; the first swing arm 443 is provided with a first force receiving part 4471, and the first force receiving part 4471 and the first glass tube clamp 445 are respectively located on both sides of the first gear 447. The cylinder block of the clamping cylinder 441 is arranged on one side of the second swing arm 444, and its piston end moves towards the first force receiving part 4471 to push the first swing arm 443 to swing. The cylinder block of the clamping cylinder 441 can be specifically mounted on the fixture mounting plate 449, or can also be mounted on the corresponding end of the second swing arm 444 through a connecting piece; one end of the clamping tension spring 442 is connected with the first force receiving part 4471, and the other end is fixedly connected with the fixture mounting plate 449 corresponding to the second swing arm 444.

[0050] As Figure 4 shown, specifically, the above-mentioned transfer channel 600 is inclined along the conveying direction of the U-shaped bend pipe, and it includes a gentle conveying section 610 and an inclined conveying section 620. The slope of the inclined conveying section 620 is greater than the slope of the gentle conveying section 610. A blocking part 630 is provided at the end of the inclined conveying section 620, and a blocking piece 640 is provided above the end of the inclined conveying section 620. In specific applications, when the flipping mechanism transfers the U-shaped bend pipe to the transfer channel 600, it will push the U-shaped bend pipe on the transfer channel 600 to move forward. Through the inclined setting, the U-shaped bend pipe can continue to move forward for conveying on the basis of this thrust; the U-shaped bend pipe is hooked by the blocking part 630 to prevent it from falling, and the adjacent U-shaped bend pipes are prevented from falling due to being lifted by the frictional force by the blocking piece.

[0051] As Figure 1 、 2As shown, in some preferred embodiments, the flipping mechanism further includes a second power component 420, which is connected to the above-mentioned executing component to drive the executing component to move up and down. By driving the executing component to move up and down through the second power component 420, the clamping structure 402 can take out the U-shaped bent pipe from the placing structure or a limiting structure such as the above-mentioned blocking portion 630.

[0052] In some embodiments, the second power component 420 includes a second cam 421, a second L-shaped swing arm 422, a guiding main shaft 423, and a guiding fixed seat 427. A swing fulcrum is provided at the bent portion of the second L-shaped swing arm 422. A second roller 424 is provided on the short arm of the second L-shaped swing arm 422. The second roller 424 contacts the second cam 421 to swing up and down under force. A second return spring 425 is connected to the long arm of the second L-shaped swing arm 422. The long arm of the second L-shaped swing arm 422 is connected to the guiding main shaft 423 to drive the guiding main shaft 423 to move up and down along the guiding fixed seat 427. The guiding main shaft 423 is connected to the executing component. Specifically, the guiding main shaft 423 and the executing component can be connected through a connecting piece structure. The guiding fixed seat 427 is installed on the machine table of the equipment. The second cam 421 and the second L-shaped swing arm 422 are installed on the machine table through a pedestal bearing structure. One end of the second return spring 425 is fixed on the machine table. The long arm of the second L-shaped swing arm 422 is connected to the guiding main shaft 423 through a second connecting rod 426, and both ends of the second connecting rod 426 are also connected with spherical plain bearings. More preferably, the second power component 420 further includes a guiding sub-shaft 428, which is connected to the guiding main shaft 423 and moves up and down following the guiding main shaft 423. The guiding fixed seat 427 is provided with a guiding hole 429, and the guiding sub-shaft 428 passes through the guiding hole 429 to move up and down.

[0053] As Figure 5 As shown, in some preferred embodiments, the above-mentioned powdering mechanism includes a second turntable structure 240 and a powdering structure 201. The powdering structure 201 includes a powder injection nozzle 210 for injecting fluorescent powder into the U-shaped bent pipe; a powder injection hose 220, one end of which is connected to the powder injection nozzle 210 and the other end is connected to a storage device for fluorescent powder. The storage device is provided with a powder injection driving structure for transporting the fluorescent powder to the powder injection nozzle 210; a first control structure 230 is provided corresponding to the powder injection hose 220 for controlling the on-off of the powder injection hose 220. The second turntable structure 240 is rotatably arranged for sequentially transporting the U-shaped bent pipe from the second loading station 261 to the powdering station 262 and the second unloading station 263. The powdering structure 201 is arranged corresponding to the powdering station 262. A set of flipping mechanisms are respectively provided at the second loading station 261 and the second unloading station 263.

[0054] In specific applications, in the passage of the powder injection hose 220, phosphor powder is transported by the driving force of the powder injection driving structure, flows through the powder injection hose 220, and is injected into the U-shaped bend through the powder injection nozzle 210. After the U-shaped bend is filled with powder, the first control structure 230 operates to close the powder injection hose 220, so that the phosphor powder cannot pass through the powder injection hose 220. After replacing the U-shaped bend to be powdered, the first control structure 230 operates again to open the powder injection hose, and the powdering work is carried out. By controlling the passage or closing of the powder injection hose 220 through the first control structure 230, the powder injection operation is controlled, eliminating the need for manual operation and effectively improving the production efficiency. Specifically, the powder injection nozzle 210 can adopt a powder injection nozzle in the prior art; the powder injection hose 220 can adopt a flexible tube with a certain elasticity, such as a rubber tube; the powder injection driving structure can adopt a powder delivery pump in the prior art (not shown in the figure), which is respectively connected to the phosphor powder storage device and the feeding pipeline, and the feeding pipeline is connected to the powder injection hose 220.

[0055] Specifically, the above-mentioned first control structure 230 includes a first driving structure 231, a fixed pressing member 232 and a movable pressing member 233. The fixed pressing member 232 and the movable pressing member 233 are respectively arranged on opposite sides of the powder injection hose 220, and the fixed pressing portion 232 is fixedly arranged relative to the powder injection hose 220. The first driving structure 231 is connected to the movable pressing member 233 to drive the movable pressing member 233 to move towards the fixed pressing member 232 and press the powder injection hose 220. In specific applications, after the U-shaped bend is filled with powder, the first driving structure 231 operates to drive the movable pressing member 233 to move towards the fixed pressing member 232 and close, so as to press the powder injection hose 220 between the two, thereby closing the powder injection hose 220 and preventing the phosphor powder from passing through the powder injection hose 220. After replacing the U-shaped bend to be powdered, the first driving structure 231 operates again to drive the movable pressing member 233 away from the fixed pressing member 232, and the powder injection hose 220 is opened and the passage is opened for the powdering work; the structure of the first control structure 230 is simple.

[0056] Such as Figure 6As shown, in some preferred embodiments, the first driving structure 231 is a double-axis cylinder. The powder injection hose 220 passes through between the two piston rods of the double-axis cylinder. The movable pressing member 233 is a connecting structure between the two piston ends of the double-axis cylinder, and the fixed pressing member 232 is correspondingly mounted on the cylinder body of the double-axis cylinder with respect to this connecting structure. In specific applications, when the piston ends contract, the movable pressing portion 133 moves towards the fixed pressing portion 232 to close the powder injection hose 20. When the piston ends extend, the movable pressing portion 133 moves away from the fixed pressing portion 232, and the powder injection hose 220 is in a passage state. By integrating the first control structure 230 with a double-axis cylinder, the structure of the powder feeding structure is further simplified, making its structure compact and convenient for installation. Specifically, this double-axis cylinder adopts the double-axis cylinder in the prior art, and its structure and specific working principle will not be elaborated in detail here.

[0057] As Figure 7 shown, specifically, the second turntable structure 240 is provided with a second clamping structure 250 for clamping the U-shaped bend. The second clamping structure 250 includes a first clamping arm 251 and a second clamping arm 252 that open and close with each other. One end of the first clamping arm 251 is provided with a first gear portion 253, and one end of the second clamping arm 252 is provided with a second gear portion 254. The first gear portion 253 meshes with the second gear portion 254. The first gear portion 253 is connected with a second force-receiving portion 255, and the second force-receiving portion 255 is used to receive force to drive the first clamping arm 251 and the second clamping arm 252 to open. The other ends of the first clamping arm 251 and the second clamping arm 252 are connected with a third return spring 256. Through the pulling force of the third return spring 256, the first clamping arm 251 and the second clamping arm 252 jointly clamp the U-shaped bend. When an external force is applied to the second force-receiving portion 255, it drives the first clamping arm 251 to rotate, and drives the second clamping arm 252 to rotate in the opposite direction through the first gear portion 253 and the second gear portion 254. Thus, the first clamping arm 251 and the second clamping arm 252 open, facilitating the replacement of the U-shaped bend, and at the same time, the return spring 360 undergoes elastic deformation. When the external force disappears, the first clamping arm 251 and the second clamping arm 252 close and clamp the U-shaped bend under the action of the third return spring 256. Specifically, the second clamping structure 250 further includes a mounting plate 257. The first clamping arm 251 and the second clamping arm 252 are rotatably mounted on the mounting plate 257. Specifically, existing technical means can be adopted, such as the structure of a rotating shaft and a bearing. The first gear portion 253 and the second gear portion 254 can be gears in the prior art, and the first clamping arm 251 and the second clamping arm 252 are respectively fixedly connected to the gears. The first gear portion 253 / the second gear portion 254 can also be a structure integrally provided on the first clamping arm 251 / the second clamping arm 252, and this structure draws on the structure of gears in the prior art.

[0058] In some preferred embodiments, a clamping die structure 258 is further provided between the first clamping arm 251 and the second clamping arm 252. The clamping die structure 258 is provided with a first clamping position 2581 and a second clamping position 2582 that match the cylindrical profile of the U-shaped bent pipe. The first clamping position 2581 is opposite to the first clamping arm 251, and the second clamping position 2582 is opposite to the second clamping arm 252. During clamping, the two straight pipes of the U-shaped bent pipe are respectively located between the first clamping arm 251 and the first clamping position 2581, and between the second clamping arm 252 and the second clamping position 2582, so that the clamping is more stable and the U-shaped bent pipe will not be crushed at the same time.

[0059] As Figure 5 shown, specifically, the second turntable structure 240 includes a turntable 241 and a third driving component. The third driving component is connected to the turntable 241 to drive the turntable 241 to rotate. A plurality of second clamping structures 250 are circumferentially arranged on the turntable 241. As the turntable 241 rotates, the plurality of second clamping structures 300 sequentially pass through the second loading station 261, the powdering structure 201, the second unloading station 263, and then return to the powdering structure 201. An external force can be applied to the second clamping structure 250 manually, or an external force can be applied to the second clamping structure 250 through a driver. Specifically, a driver can be provided corresponding to each second clamping structure 250.

[0060] In some preferred embodiments, the powdering mechanism further includes a second driving structure 270. The second driving structure 270 is respectively provided at the second loading station 261 and the second unloading station 263. The second driving structure 270 is used to drive the second clamping structure 250 at the second loading station 261 or the second unloading station 263 to open. Thus, when the second clamping structure 250 enters the second loading station 261 or the second unloading station 263, an external force is applied through the second driving structure 270, which simplifies the overall structure of the device. Specifically, the second driving structure 270 can be connected to the above-mentioned PLC control system. By only setting the second driving structure at the second loading station and the second unloading station, it is beneficial for the above-mentioned PLC control system to carry out unified overall control work. Specifically, the second driving structure 270 can adopt a cylinder in the prior art. The piston end of the cylinder is connected with a force-applying component 271. Through the force-applying component 271, the driving force is accurately transmitted to the second clamping structure 250.

[0061] As Figure 8As shown, specifically, the above drying mechanism includes a conveying chain 310, a positioning structure 340, and a third loading station 330. A plurality of hooks 320 for hanging U-shaped bent pipes are distributed on the conveying chain 310. The third loading station 330 is arranged corresponding to a corresponding flipping mechanism, and the positioning structure 340 is arranged adjacent to the third loading station 330 for positioning the hooks on the third loading station 330 relative to the flipping mechanism.

[0062] Specifically, the drying mechanism further includes a drying chamber 350. The conveying chain 310 moves in a cycle and passes through the drying chamber 350. The hooks 320 are distributed along the circulating chain 100 and continuously send the U-shaped bent pipes into the drying chamber 350 with the conveying chain 310 for drying, and then unload at the outlet end of the drying chamber 350. In a specific application, after the conveying chain 310 sends the U-shaped bent pipes to the drying chamber 350, the empty hooks 320 continue to return to the third loading station 330 with the circulating conveying chain 310. The positioning structure 340 positions the hooks 320 relative to the flipping mechanism, enabling the flipping mechanism to transfer and hang the U-shaped bent pipes onto the hooks 320.

[0063] As Figure 9 shown, specifically, the above positioning structure 340 includes a third driving component 341 and a positioning member 342. The positioning member 342 is connected to the third driving component 341, and the third driving component 341 is used to drive the positioning member 342 to reciprocate relative to the hook 320. In a specific application, when the hook 320 reaches the third loading station 330, the third driving component 341 drives the positioning member 342 to move towards the hook 320 to position the hook 320. After the U-shaped bent pipe is hung on the hook 320, the third driving component 341 drives the positioning member 342 to move away from the hook 320, and the hook 320 continues to move forward driven by the conveying chain 310. Specifically, the positioning member 342 can position the hook 320 at the front end of the movement of the hook 320. Specifically, the third driving component 341 can adopt a cylinder, and the positioning member 342 is fixedly connected to the piston end of the cylinder.

[0064] In some preferred embodiments, the above hook 320 is connected to the conveying chain 310 through a connecting rod 360. The positioning member 342 is provided with a positioning groove 343, and the positioning groove 343 can catch the connecting rod 360.

[0065] As Figure 8 、 9As shown, in some embodiments, the drying mechanism further includes an auxiliary guide rail 380. The auxiliary guide rail 380 is arranged along the conveying chain 310. One end of the connecting rod 360 is provided with a roller 361, and the roller 361 rolls along the auxiliary guide rail 380. Specifically, the conveying chain 310 drives the connecting rod 360 to move in the horizontal plane. The hook 320 is connected to the connecting rod 360 below the connecting rod 360, facilitating feeding. The auxiliary guide rail 380 makes the movement of the connecting rod 360 more stable.

[0066] As Figure 10 , 12 As shown in FIGS. 14, in some embodiments, the above-mentioned elbow bending mechanism includes an upper pipe structure, a flame spraying head structure (not shown in the figure), an elbow bending structure, and a first turntable structure (not shown in the figure). The elbow bending structure is arranged between the upper pipe structure and the first turntable structure, and the flame spraying head structure is arranged below the upper pipe structure. The elbow bending structure includes a bending execution component and a cam driving component 130. The bending execution component includes a clamping arm structure 110 and a transmission connecting piece 120. The clamping arm structure 110 includes a first clamping arm structure 110a and a second clamping arm structure 110b arranged oppositely. The first clamping arm structure 110a and the second clamping arm structure 110b are respectively connected with a flipping swing arm 161. One ends of the two flipping swing arms 161 are rotatably arranged and are respectively connected with a driving gear 162 and a driven gear 163. The driving gear 162 meshes with the driven gear 163. The transmission connecting piece 120 includes a gear transmission part 121 and a transmission swing arm 122. The gear transmission part 121 is rotatably arranged and meshes with the driving gear 162. The cam driving component 130 is connected to the transmission swing arm 122 to drive the transmission swing arm 122 to swing and drive the gear transmission part 121 to rotate. The first turntable structure is rotatably arranged and is used to convey the U-shaped elbow from the first loading station to the first unloading station. The first loading station corresponds to the elbow bending structure, and a set of flipping mechanisms are arranged at the first unloading station.

[0067] In a specific application, the cam driving component 130 drives the transmission swing arm 122 to swing up and down. At the same time, the gear transmission part 121 rotates. The gear transmission part 121 drives the driving gear 162 and the driven gear 163 to rotate, and then drives the clamping arm structure 110 to swing 90° along with the flipping swing arm 161, so as to realize the bending of the straight glass tube. By using a structure that can bear long-term loads and work stably to replace the cylinder for driving, the bending force is stable, so that the bending quality of the glass tube is stable. And through the structures of the gear transmission part 121, the driving gear 162 and the driven gear 163, the unified control of the two clamping arm structures 110 is realized, further improving the stability of the bending quality of the glass tube. Specifically, the gear transmission part 121 can be set in a fan shape and adopt the structure of a gear in the prior art. The gear transmission part and the transmission swing arm can be integrally arranged or separately arranged, and are fixedly connected by means of threaded connection.

[0068] As Figure 10 , 11 shown, in some embodiments, the bending execution component further includes two parallel rotating shafts 164. The two rotating shafts 164 are rotatably arranged. The above-mentioned driving gear 162 and the flipping swing arm 161 corresponding to the first clamping arm structure 110a, and the driven gear 163 and the flipping swing arm 161 corresponding to the second clamping arm structure 110b are respectively connected to the two rotating shafts 164. Specifically, the bending execution component is assembled and connected through the total mounting seat 165. The transmission connecting piece 120 (specifically the gear transmission part 121) is rotatably connected to one side surface of the total mounting seat 165, and specifically, an existing bearing structure can be adopted; two opposite mounting walls 166 are provided at the top of the total mounting seat 165, and the two mounting walls 166 are arranged in the same straight line as the transmission connecting piece 120. The two ends of the above-mentioned rotating shaft 164 are rotatably mounted on the two mounting walls 166, and specifically, an existing bearing structure can be adopted, and the end close to the transmission connecting piece 120 is provided with interference fit to mount the driving gear 162 or the driven gear 163, and the flipping swing arm 161 is connected at the part of the rotating shaft 164 between the two mounting walls 166.

[0069] Specifically, the above-mentioned cam driving component 130 is connected to the transmission swing arm 122 through a guide shaft 131. A guide seat 132 is sleeved outside the guide shaft 131, and the guide seat 132 is fixedly arranged relative to the bending execution component. Specifically, the guide seat 132 is arranged in an inverted F shape, its vertical arm is connected to the above-mentioned total mounting seat 165, and guide holes are respectively provided on the two horizontal arms. The guide shaft 131 passes through the two guide holes and moves up and down along the two guide holes; the upper end of the guide shaft 131 is connected to the transmission swing arm 122 through a spherical plain bearing structure, and the lower end is connected to the cam driving component 121. As a better solution, the guide shaft 131 is also matched with an auxiliary guide shaft 133. The auxiliary guide shaft 133 is arranged in parallel with and fixedly connected to the guide shaft 131. A guide pair hole is provided on the lower horizontal arm of the guide seat 132, and the auxiliary guide shaft 133 moves up and down along the guide pair hole.

[0070] As Figure 12 shown, in some preferred embodiments, the bent pipe structure further includes a transfer cam structure 140 and an auxiliary moving pair 150. The transfer cam structure 140 is connected to the bending execution component to drive the bending execution component to move horizontally. The cam driving component 130 is connected to the transmission swing arm 122 through the auxiliary moving pair 150, and the cam driving component 130 is connected to the guiding member 151 of the auxiliary moving pair 150. The extending direction of the auxiliary moving pair 150 is the same as the horizontal moving direction of the bending execution component. In specific applications, there is a certain distance between the upper pipe structure and the first turntable structure. When the bent pipe structure bends a straight glass tube, it needs to reciprocate between the two. Specifically, the transfer cam structure 140 drives the bending execution component to move horizontally to grab the straight glass tube from the upper pipe structure 700, bend it and then transfer it to the first turntable structure; the driving force of the cam driving component 130 is transmitted to the bending execution component through the auxiliary moving pair 150, so that when the bending execution component moves horizontally, it can adapt to the displacement between it and the cam driving component 130 and maintain the connection with the cam driving component 130. Specifically, the bending execution component is connected with a slide block guide rail pair 167. The extending direction of the slide block guide rail pair 167 is the same as the moving direction of the bending execution component. Among them, the guide rail member 1671 is fixedly arranged, the slide block member 1672 is connected to the above-mentioned total mounting seat 165, and the transfer cam structure 140 is connected to the slide block member 1672 or the total mounting seat 165. Specifically in this embodiment, the transfer cam structure 140 is connected to the slide block member 1672.

[0071] As Figure 10 、 11As shown, in some preferred embodiments, the above-mentioned auxiliary moving pair 150 further includes an upper sliding member 152 and a lower sliding member 153. The upper sliding member 152 and the lower sliding member 153 are respectively arranged at the top and bottom of the guiding member 151 and slide along the guiding member 151. The upper sliding member 152 and the lower sliding member 153 are connected by a sliding connecting member 154 and are connected to the transmission swing arm 122 through the sliding connecting member 154. Specifically, in this embodiment, they are connected to the transmission swing arm 122 through a guiding shaft 131. Thus, the upper sliding member 152 and the lower sliding member 153 slide at the top and bottom of the guiding member 151 and clamp the guiding member 151, enabling the guiding member 151 to drive the overall structure of the upper sliding member 152 and the lower sliding member 153 to move up and down, so as to transmit the driving force of the cam driving member 130 to the transmission swing arm 122. Specifically, the guiding member 121 can adopt a straight skateboard, and the upper sliding member 152 and the lower sliding member 153 can adopt handle bearings.

[0072] Specifically, the above-mentioned guiding member 151 is connected with a guiding member 155, and the guiding member 155 is provided with a guiding column 156 to move up and down along the guiding column 156. Further, the guiding member 155 can adopt a linear bearing, and the guiding column 156 is fixedly arranged through a bracket structure.

[0073] As Figure 12 shown, in some preferred embodiments, the above-mentioned transfer cam structure 140 is connected to the bending execution member through a rotating member 141. The rotating member 141 is fixedly connected to the transfer cam structure 140 and rotatably connected to the bending execution member. Thus, it can adapt to the displacement in the vertical direction between the transfer cam structure 140 and the bending execution member during horizontal movement. Specifically, the rotating member 141 can adopt a bearing structure and is installed on the side of the above-mentioned slider member 1672.

[0074] As Figure 13 shown, specifically, the above-mentioned first clamping arm structure 110a and the second clamping arm structure 110b are the same, and both include a pipe clamp 111. The pipe clamp 111 is provided with a mounting rod 112 and is connected to the above-mentioned flipping swing arm 161 through the mounting rod 112. The pipe clamp 111 includes a fixed clamping finger 113 and a movable clamping finger 114. The fixed clamping finger 113 is fixedly connected to the mounting rod 112, and the movable clamping finger 114 is hinged to the fixed clamping finger 113 to swing open and close relative to the fixed clamping finger 113. The movable clamping finger 114 is driven by a pipe clamping cylinder 115. The pipe clamping cylinder 115 is arranged in parallel with the mounting rod 112 and is fixedly connected to the mounting rod 112 through a connecting member structure. Its extending piston end is connected to the movable clamping finger 114 through a spherical plain bearing.

[0075] As Figure 10 、 11As shown, specifically, the cam driving component 130 includes a first lever arm 134 and a first lever cam 135, one end of the first lever arm 142 is rotatably arranged, and the other end thereof is connected to the above-mentioned guide member 151 through a joint bearing structure; a first abutting wheel 137 is provided in the middle part (close to the rotating end) of the first lever arm 134, and the first abutting wheel 137 is used to abut against the first lever cam 136 to obtain a driving force for up and down swinging; the first lever arm 134 is also connected to a tension spring (not shown in the figure) for resetting, and one end of the tension spring is fixedly arranged.

[0076] like Figure 12 As shown, specifically, the transfer cam structure 140 includes a second lever arm 141 and a second lever cam 142. One end of the second lever arm 141 is rotatably arranged, and the other end thereof is connected to the above-mentioned rotating member 134; a second abutting wheel 143 is provided in the middle portion (close to the rotating end) of the second lever arm 141, and the second abutting wheel 143 is used to abut against the second lever cam 142 to obtain a driving force for left and right swinging (see Figure 12 the second lever arm 141 is also connected to a tension spring (not shown) for resetting, one end of which is fixedly arranged.

[0077] like Figure 14 , 15 As shown, in some embodiments, the upper tube structure includes a storage tank 710, a feeding channel 720 and a conveying channel 730; the storage tank 710 is located below the conveying channel 730 and is used to store the straight glass tube; the conveying channel 730 is used to convey the straight glass tube to the flame head structure; the feeding channel 720 obliquely passes through the storage tank 710 from bottom to top, and the upper end is connected to the conveying channel 730; the feeding channel 720 includes a circulating feeding conveying chain 721, and the feeding trough 722 is distributed on the feeding conveying chain 721, and the feeding trough 722 is used to hook the straight glass tube to follow the rotation of the feeding conveying chain 721 for feeding. The above-mentioned flame head structure is arranged below the conveying channel 730, specifically close to the bent tube structure. The flame head structure can adopt the flame head structure in the prior art. In specific applications, the conveying channel 730 drives the straight glass tube to enter and pass through the flame head structure, so that the flame head structure performs a flame roasting treatment on the straight glass tube.

[0078] In specific applications, the linear glass tube is placed vertically in the storage tank 710 with respect to the moving direction of the feeding channel 720. A section of the feeding conveyor chain 721 in contact with the linear glass tube moves from bottom to top. When passing through the storage tank 710, the linear glass tube falls into the feeding trough 722, and the feeding trough 722 hooks the linear glass tube to convey it upward for feeding. Continuous feeding is carried out through the feeding conveyor chain 721 and the feeding trough 722. One rotation of the feeding conveyor chain 721 can convey multiple linear glass tubes, and the feeding efficiency is high. Thus, the storage tank 710 can store a large amount of materials and prevent the glass tubes from breaking. Specifically, gears are meshed at both ends of the feeding conveyor chain 721. The gears are installed through a rotating shaft and a bearing structure, and the gear located at the upper end of the feeding conveyor chain is connected to a driving motor. Since the installation of the feeding conveyor chain through a rotating shaft and a bearing structure and the driving by connecting a motor are prior arts, no detailed description will be given here.

[0079] Specifically, the storage tank 710 includes a first side plate 711, a second side plate, and a bottom plate 712. The first side plate 711 and the second side plate are oppositely arranged and are respectively connected to the bottom plate 712. The feeding channel 720 is provided at one end of the storage tank 710 and forms one side surface of the storage tank 710. A blocking structure 713 for preventing the linear glass tube from falling is provided at the other end of the storage tank 710. Specifically, the blocking structure 713 includes at least one blocking rod, and the blocking rod is vertically installed on the bottom plate 712.

[0080] Specifically, the tube loading structure further includes a frame 740. The frame 740 includes a platform 741 and a placement table 742. The platform 741 is used for installing the conveying channel 730. The placement table 742 is connected to the platform 741 at the lower end of the platform 741 and is used for installing the storage tank 100. The conveying channel 730 is installed on the platform 741 through a first bracket 751; the bearing structure at one end of the feeding channel 720 is installed on the platform through a second bracket 752, and the bearing structure at the other end is directly installed on the placement table 742; the storage tank 710 is installed on the placement table 742 through a first support 753.

[0081] In some embodiments, the upper end of the above-mentioned feeding channel 720 is docked with the conveying channel 730 through a guide rail 760. Specifically, the horizontal position of the top end of the feeding channel 720 is slightly higher than that of the conveying channel 730. When the feeding trough 722 hooked with the linear glass tube rotates past the top end, the linear glass tube falls from the feeding trough 722 onto the guide rail 760 and then slides along the guide rail 760 to the conveying channel 730. Thus, the linear glass tube can be smoothly conveyed from the feeding channel to the conveying channel.

[0082] Specifically, the above-mentioned conveying channel 730 includes a plurality of conveying wheel sets 731, which are arranged successively, and the rotation ranges of adjacent conveying wheel sets 731 intersect to convey the above-mentioned straight glass tube forward; the conveying wheel set 731 is provided with a conveying groove 732 to hook the straight glass tube conveyed by the previous conveying wheel set 731 and rotate it to the next conveying wheel set 731. Thus, the straight glass tube can be conveyed at a certain frequency and / or spacing through a plurality of conveying wheel sets. Specifically, the two ends are rotatably installed on the first bracket 751, and the plurality of conveying wheel sets 731 can be uniformly driven through a transmission structure of gears and chains to achieve synchronous rotation; they can also be driven separately and controlled by a control system to rotate successively at a certain time frequency. When the conveying groove 732 rotates to the guide rail 760, the straight glass tube on the guide rail 760 falls into the conveying groove 732 and is hooked by the conveying groove 732, rotates with it and falls to the intersection line of this conveying wheel set 731 and the next conveying wheel set; when the conveying groove 732 of the next conveying wheel set 731 rotates to this intersection line, the straight glass tube falls into its conveying groove 732 and is hooked by the conveying groove 732, rotates with it and falls to the intersection line of this conveying wheel set 731 and the next conveying wheel set 10; thus, the straight glass tube is repeatedly conveyed forward.

[0083] Specifically, the above-mentioned conveying wheel set 731 includes at least two conveying wheels, and the conveying wheels in the same group are fixedly connected by a rotating shaft; the conveying wheels of adjacent conveying wheel sets are arranged with staggered positions so that the rotation ranges of adjacent two conveying wheel sets intersect. Specifically, both ends of the rotating shaft are installed on the first bracket through bearings, and one end thereof is installed with a gear. The gears of a plurality of drive shafts are engaged with a chain, and the drive shaft at the front end of the conveyance is connected to a drive motor as the driving shaft. Since driving the rotating shaft by a motor is a prior art, it will not be elaborated in detail here.

[0084] Specifically, the first turntable structure is provided with a first clamping structure for clamping the U-shaped bent pipe. The first turntable structure can adopt the same structure as the above-mentioned second turntable structure 240, the first clamping structure adopts the same structure as the second clamping structure 250, and the first clamping structure at the first loading station or the first unloading station is also driven to open by a first driving structure having the same structure as the second driving structure 270.

[0085] Such as Figure 16 、 17As shown, in some preferred embodiments, the above-mentioned tube bending mechanism also includes a tube clamping structure, which is arranged between the tube bending structure and the flipping mechanism along the rotation direction of the first turntable structure, and includes a mold structure 810, a mold opening clamp 820, a mold opening cam structure 830 and a fourth reset spring 840; the mold structure 810 includes a first mold structure 810a and a second mold structure 810b that are relatively opened and closed in a horizontal direction; the mold opening clamp 820 is arranged between the first mold structure 810a and the second mold structure 810b, and is close to the first mold structure 810a and the second mold structure 810b, and is used to reciprocate relative to the mold structure 810 so that the mold structure 810 can open the mold; the mold opening cam structure 830 is connected to the mold opening clamp 820, and is used to drive the mold opening clamp 820 to reciprocate; the two ends of the fourth reset spring 840 are respectively connected to the first mold structure 810a and the second mold structure 810b, and are used to provide pulling force to drive the mold structure 810 to close the mold. Therefore, the U-shaped bent tube is shaped after bending by the tube clamping structure, and the mold structure 810 is driven to move in the horizontal direction for mold opening and mold closing by the mold opening cam structure 830 and the fourth reset spring 840, so that the upper and lower ends of the mold structure 810 are synchronously contacted and closed, and the molds are matched, so that the mold closing and shaping work of the bent tube is stable, thereby ensuring stable product quality.

[0086] The mold opening clamp 820 is driven by the mold opening cam structure 830 to reciprocate relative to the mold structure 810 between the first mold structure 810a and the second mold structure 810b; when the mold opening clamp 820 is driven by the mold opening cam structure 830 to move closer to the mold structure 810 and penetrate into the space between the first mold structure 810a and the second mold structure 810b, the first mold structure 810a and the second mold structure 810b are pushed open relative to each other to open the mold; when the mold opening clamp 820 is driven by the mold opening cam structure 830 to move away from the mold structure 810, the first mold structure 810a and the second mold structure 810b are closed under the action of the fourth reset spring 840.

[0087] In a specific application, the mold structure 810 is installed through a relatively fixed mounting platform 850. The first mold structure 810a and the second mold structure 810b move in the horizontal direction for mold opening / closing. The mold clamping member 820 moves up and down relative to the mold structure 810. The mold opening cam structure 830 is installed on the mounting platform 850. Specifically, the mold structure 810 further includes a first moving component and a second mounting component. The first moving component includes a first guide rail 816 and a first slider 817. The first mold structure 810a is connected to the first slider 817 for movement. The second moving component 120 includes a second guide rail 816 and a second slider 819. The second mold structure 810b is connected to the second slider 819 for movement. Specifically, the mold structure 810 can be installed on the mounting platform 850 through a support 870. An installation method can be adopted in which two supports 870 are respectively used to install the first mold structure 810a and the second mold structure 810b, or an installation method can be adopted in which one support 870 is used to install the overall structure of the mold structure 810. The support 870 is provided with through holes for the mold clamping member 820 to move. Specifically, the first mold structure 810a and the second mold structure 810b have the same structure, and both include a bent pipe mold 811, a mold mounting plate 812, and a mold mounting seat 813. The mold mounting seat 813 is connected to the first slider 817 / second slider 819. The bent pipe mold 811 is connected to the mold mounting seat 813 through the mold mounting plate 812. Both ends of the fourth return spring 840 are fixedly connected to the two mold mounting seats 813.

[0088] Specifically, the mold opening cam structure 830 includes a third cam 831, a third swing arm 832, and a fifth return spring 833. One end of the third swing arm 832 is provided with an auxiliary arm 834, and the auxiliary arm 834 is provided with a third roller 835. The third roller 835 is located within the rotation range of the third cam 831 and is used to closely abut against the third cam 831. The other end of the third swing arm 832 is connected to the fifth return spring 833 to obtain a restoring force. The third swing arm 832 is connected to the mold opening and clamping member 820. Specifically, the end of the third swing arm 832 where the auxiliary arm is provided and the third cam 831 are rotatably connected to the mounting platform 850. One end of the fifth return spring 833 is fixedly connected to the other end of the third swing arm 832, and the other end is fixedly connected relative to the mounting platform 850. Specifically, when the third cam 831 rotates to abut against the roller, the third swing arm 832 swings upward, driving the mold opening and clamping member 820 to move upward to push open the first mold structure 810a and the second mold structure 810b to open the mold. At the same time, the fourth return spring 840 and the fifth return spring 833 are stretched to generate a restoring force. When the third cam 831 rotates away from the third roller, the third swing arm 832 swings downward under the drive of the fifth return spring 833, driving the mold opening and clamping member 820 to move downward. At the same time, the fifth return spring 833 drives the first mold structure 810a and the second mold structure 810b to move to close the mold.

[0089] As Figure 17 shown, specifically, the first mold structure 810a and the second mold structure 810b are respectively provided with a convex portion 814. The two convex portions 814 are correspondingly arranged on the opposite sides of the first mold structure 810a and the second mold structure 810b. The first mold structure 810a and the second mold structure 810b are closely abutted against the mold opening and clamping member 820 through the convex portion 814. Specifically, the convex portion is provided on the mold mounting seat 813.

[0090] As Figure 3As shown, specifically, the above-mentioned mold opening and clamping member 820 includes a mold opening part 821 and a guiding part 822 which are connected. The guiding part 822 is close to the mold structure 810. The mold opening part 821 is used to push open the first mold structure 810a and the second mold structure 810b so as to open the mold structure 810. The guiding part 822 is used to guide the mold opening part 821 to enter between the first mold structure 810a and the second mold structure 810b. Specifically, the guiding part 822 includes a first guiding part 823 and a second guiding part 824, and the second guiding part 824 is connected to the mold opening part 821. The horizontal dimension a of the mold opening part 821 is greater than the horizontal dimension b of the first guiding part 823, and the horizontal dimension c of the second guiding part 824 gradually decreases from the horizontal dimension a to the horizontal dimension b. In specific applications, when the mold structure 810 is closed, the two convex parts 814 are close to the first guiding part 823. When the third cam 831 drives the mold opening and clamping member 820 to move upward, the second guiding part 824 passes through the two convex parts 814, gradually pushing open the first mold structure 810a and the second mold structure 810b until the two convex parts 814 are close to the mold opening part 821, completing the mold opening.

[0091] As Figure 17 shown, in some preferred embodiments, the above-mentioned first mold structure 810a and second mold structure 810b are provided with guiding bearings 815 which are arranged on the opposite sides of the guiding bearings 815, and the guiding bearings 815 slide relative to the mold opening and clamping member 820. Thus, the relative movement between the mold opening and clamping member 820 and the mold structure 810 can be made smoother. Specifically, the guiding bearings 815 are rotatably mounted on the convex parts 814.

[0092] Specifically, the swing arm 832 is connected to the mold opening and clamping member 820 through a transmission shaft 860. In some embodiments, the above-mentioned transmission shaft 860 is matched with a first linear bearing 861, and the first linear bearing 861 is sleeved outside the transmission shaft 860. In practical applications, the transmission shaft 860 moves along the first linear bearing 861, and the first linear bearing 861 is mounted on the mounting platform 850. Specifically, the swing arm is connected to the transmission shaft 860 through a joint bearing structure 866.

[0093] As Figure 16 shown, in some embodiments, the pipe clamping structure further includes an auxiliary shaft 862 which is arranged in parallel with the transmission shaft 860 and moves synchronously with the transmission shaft 860. The auxiliary shaft 862 is matched with a second linear bearing 863, and the second linear bearing 863 is sleeved outside the auxiliary shaft 862. Specifically, one end of the transmission shaft 860 and the auxiliary shaft 862 are fixedly connected through a connecting plate 864, and the second linear bearing 863 and the first linear bearing 861 are fixedly connected through a connecting piece 865.

[0094] In some preferred embodiments, two sets of upper tube structures are provided on the outer side of the first turntable structure 160, and two sets of elbow tube structures and two sets of burner head structures are respectively provided corresponding to the two sets of upper tube structures; each set of flipping mechanisms is correspondingly provided with two sets of fixture structures 800, two transfer channels 600 are provided in parallel with each other, and are respectively corresponding to the two sets of fixture structures 800; two powder feeding structures 201 are provided at the powder feeding station 262, and two positioning structures 340 are provided at the third feeding station 330, and the two positioning structures 340 are respectively corresponding to the two sets of fixture structures 800; specifically, the two sets of fixture structures 800 are fixedly connected to the cross arm a through the same fixture mounting plate 449, and in the first turntable structure 160 and the second turntable structure 240, one set of second driving components 270 is respectively provided for the two clamping structures corresponding to the feeding station / discharging station. Thus, double-station processing is realized, and the production efficiency is further improved.

[0095] As Figure 9 shown, in some preferred embodiments, the drying mechanism further includes a first adjustment structure 370, which is arranged at the rear end of the feeding station 330 along the conveying direction of the conveying chain 310, and the first adjustment structure 370 is used to adjust the distance between two adjacent connecting rods 360. In specific applications, when performing double-station processing, it is necessary to ensure that the two hooks 320 fed simultaneously can respectively accurately align with the two sets of fixture structures 800 of the flipping mechanism. Since the connecting rod 360 will swing during the movement process, the distance between two adjacent hooks 320 will change, and the position of the positioning structure 340 has been pre-fixed corresponding to the double station. When the two hooks 320 fed simultaneously move to the third feeding station 330, it may occur that the front hook 320 can be accurately positioned under the action of the corresponding positioning structure 340, but the rear hook 320 cannot be accurately positioned. Through the first adjustment structure 370, the distance between the two hooks 320 is adjusted before they enter the third feeding station 330 to ensure that they can be successfully positioned after entering the third feeding station 330, so that the two U-shaped bent pipes on the two sets of fixture structures of the flipping mechanism can be accurately fed.

[0096] Specifically, the first adjustment structure 370 includes a fourth driving member 371 and a limiting member 372. The limiting member 372 is connected to the fourth driving structure 371, and the fourth driving structure 371 is configured to drive the limiting member 372 to reciprocate relative to the connecting rod 360. In a specific application, after the connecting rod 360 rotates past the conveying sprocket 311 along with the conveying chain 310, the fourth driving structure 371 drives the limiting member 372 to act to adjust the position of the connecting rod 360, so that the connecting rods 360 enter the third loading station 330 at a certain distance from each other. Specifically, the fourth driving structure 371 may be a cylinder, the limiting member 372 is fixedly connected to the piston end of the cylinder, and the limiting member 372 extends from the front direction of the movement of the connecting rod 360 towards the connecting rod 360 to push the connecting rod 360 to adjust its position.

[0097] In the description of this specification, the descriptions with reference to the terms "one embodiment", "certain embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0098] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A U-shaped elbow production device, characterized in that, It includes a flipping mechanism, a bent pipe mechanism, a powder coating mechanism, and a drying mechanism that are connected in sequence. There are two sets of the flipping mechanisms between the bent pipe mechanism and the powder coating mechanism, and a transfer channel (600) is provided between the two sets of the flipping mechanisms. The U-shaped bent pipe is hung downward with its opening facing down on the transfer channel (600) for transportation. There is one set of the flipping mechanism between the powder coating mechanism and the drying mechanism. The flipping mechanism includes: A fixture structure (402) that is used to grasp the U-shaped bent pipe; A flipping structure (401) that is connected to the fixture structure (402) and is used to drive the fixture structure (402) to flip, so as to change the opening orientation of the U-shaped bent pipe and transfer it.

2. The U-shaped elbow production equipment according to claim 1, characterized in that, The flipping structure (401) includes an execution component and a first power component (410). The execution component includes a flipping arm (431) in a Z-like shape, a flipping guide rail (432), and a driving guide rail (433). The flipping guide rail (432) and the driving guide rail (433) are arranged in parallel. One end of the horizontal arm a of the Z-like flipping arm (431) is connected to the driving guide rail (433) through a rotating seat (434) and can rotate relative to the rotating seat (434). The other end of the horizontal arm b of the Z-like flipping arm (431) is slidably connected to the flipping guide rail (432). A flipping groove (435) is provided in the middle of the flipping guide rail (432), and the flipping groove (435) is used to receive the horizontal arm b so that the Z-like flipping arm (431) swings. The horizontal arm a is connected to the fixture structure (402) to drive the fixture structure (402) to flip. The first power component (410) is connected to the rotating seat (434) to drive the Z-like flipping arm (431) to perform reciprocating motion along the flipping guide rail (432) and the driving guide rail (433).

3. The U-shaped elbow production equipment according to claim 1, characterized in that, The fixture structure (402) includes a clamping cylinder (441), a clamping tension spring (442), a first swing arm (443) and a second swing arm (444); a first gear (447) and a second gear (448) are respectively connected to the first swing arm (443) and the second swing arm (444), and the first gear (447) meshes with the second gear (448); one ends of the first swing arm (443) and the second swing arm (444) are respectively connected to a first glass tube clamp (445) and a second glass tube clamp (446), and the first glass tube clamp (445) and the second glass tube clamp (446) are arranged oppositely to clamp the U-shaped bent tube; the clamping cylinder (441) and the clamping tension spring (442) are arranged between the first swing arm (443) and the second swing arm (444), and the clamping cylinder (441) makes a telescopic movement between the first swing arm (443) and the second swing arm (444) to drive the first swing arm (443) and the second swing arm (444) to swing towards / away from each other with the first gear (447) and the second gear (448) as fulcrums respectively, and the clamping tension spring (442) is used to provide a reset pulling force.

4. The U-shaped elbow production equipment according to claim 1, characterized in that, The transfer channel (600) is inclined along the conveying direction of the U-shaped bent tube, and it includes a gentle conveying section (610) and an inclined conveying section (620). The slope of the inclined conveying section (620) is greater than that of the gentle conveying section (610). A blocking portion (630) is provided at the end of the inclined conveying section (620), and a blocking member (640) is provided above the end of the inclined conveying section (620).

5. The U-shaped elbow pipe production equipment according to claim 4, characterized in that, The powdering mechanism includes a second turntable structure (240) and a powdering structure (201). The powdering structure (201) includes a powder injection nozzle (210), a powder injection hose (220) and a first control structure (230). The powder injection nozzle (210) is used to inject phosphor powder into the U-shaped bent tube. One end of the powder injection hose (220) is connected to the powder injection nozzle (210), and the other end is connected to a storage device of the phosphor powder. The storage device is provided with a powder injection driving structure for conveying the phosphor powder to the powder injection nozzle (210). The first control structure (230) is arranged corresponding to the powder injection hose (220) and is used to control the passage or closure of the powder injection hose (220); the second turntable structure (240) is rotatably arranged and is used to sequentially convey the U-shaped bent tube from the second loading station (261) to the powdering station (262) and the second unloading station (263). The powdering structure (201) is arranged corresponding to the powdering station (262), and a set of the flipping mechanisms are respectively provided at the second loading station and the second unloading station.

6. The U-shaped elbow pipe production equipment according to claim 5, characterized in that, The drying mechanism includes a conveying chain (310), a positioning structure (340), and a third loading station (330). A plurality of hooks (320) for hanging the U-shaped bent pipes are distributed on the conveying chain (310). The third loading station (330) is arranged corresponding to the respective turning mechanism. The positioning structure (340) is arranged adjacent to the third loading station (330) and is used to position the hooks (320) on the third loading station (330) relative to the turning mechanism.

7. The U-shaped elbow production equipment according to claim 6, characterized in that, The bent pipe mechanism includes an upper pipe structure, a flame spraying head structure, a bent pipe structure, and a first turntable structure (160). The bent pipe structure is arranged between the upper pipe structure and the first turntable structure (160). The flame spraying head structure is arranged below the upper pipe structure. The bent pipe structure includes a bending execution component and a cam driving component (130). The bending execution component includes: a clamping arm structure (110) and a transmission connecting piece (120). The clamping arm structure (110) includes a first clamping arm structure (110a) and a second clamping arm structure (110b) arranged oppositely. The first clamping arm structure (110a) and the second clamping arm structure (110b) are respectively connected with a turning swing arm (161). One ends of the two turning swing arms (161) are rotatably arranged and are respectively connected with a driving gear (162) and a driven gear (163). The driving gear (162) meshes with the driven gear (163). The transmission connecting piece (120) includes a gear transmission part (121) and a transmission swing arm (122). The gear transmission part (121) is rotatably arranged and meshes with the driving gear (162). The cam driving component (130) is connected with the transmission swing arm (122) to drive the transmission swing arm (122) to swing up and down so as to drive the gear transmission part (121) to rotate. The first turntable structure (160) is rotatably arranged and is used to convey the U-shaped bent pipe from the first loading station to the first unloading station. The first loading station is arranged corresponding to the bent pipe structure. A set of the turning mechanisms is arranged at the first unloading station.

8. The U-shaped elbow production equipment according to claim 7, characterized in that, The upper pipe structure includes a storage tank (710), a loading channel (720), and a conveying channel (730). The storage tank (710) is located below the conveying channel (730) and is used to store straight glass tubes. The conveying channel (730) is used to convey the straight glass tubes to the flame spraying head structure. The loading channel (720) obliquely penetrates through the storage tank (710) from bottom to top and is butt-jointed with the conveying channel (730) at the upper end. The loading channel (720) includes a circulating and rotating loading conveying chain (721). A plurality of loading grooves (722) are distributed on the loading conveying chain (721). The loading grooves (722) are used to hook the straight glass tubes to perform loading following the rotation of the loading conveying chain (721).

9. The U-shaped elbow production equipment according to claim 8, characterized in that, Two sets of upper tube structures are arranged on the outer side of the first turntable structure (160), and two sets of the elbow tube structures and two sets of the flame spraying head structures are respectively arranged corresponding to the two sets of upper tube structures; two sets of fixture structures (402) are respectively provided for each set of the flipping mechanisms, two sets of the transfer channels (600) are arranged in parallel with each other and respectively correspond to the two sets of the fixture structures (402); two sets of powder coating structures (201) are provided at the powder coating station (262), two sets of positioning structures (340) are provided at the third feeding station (330), and the two sets of positioning structures (340) respectively correspond to the two sets of the fixture structures (402).

10. The U-shaped elbow production equipment according to claim 7, characterized in that, The elbow tube mechanism further includes a tube clamping structure which is arranged between the elbow tube structure and the flipping mechanism along the rotation direction of the first turntable structure (160), and includes a die structure (810), a die opening and clamping part (820), a die opening cam structure (830) and a fourth return spring (840); the die structure (810) includes a first die structure (810a) and a second die structure (820b) which are arranged to open and close relative to each other in the horizontal direction; the die opening and clamping part (820) is arranged between the first die structure (810a) and the second die structure (820b) and is in close contact with the first die structure (810a) and the second die structure (820b) for reciprocating relative to the die structure (810) to open the die structure (810); the die opening cam structure (830) is connected with the die opening and clamping part (820) for driving the die opening and clamping part (820) to reciprocate; both ends of the fourth return spring (840) are respectively connected with the first die structure (810a) and the second die structure (820b) for providing a pulling force to drive the die structure (810) to close the die.

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