A powder conveying device

Abstract

The present invention belongs to the technical field of conveying equipment, specifically a powder conveying device, including a closed annular body, a plurality of unloading mechanisms are arranged on the conveying pipeline of the annular body, the unloading mechanism includes a cylinder and a first inner cylinder, the cylinder is separated into a driving box and an unloading cylinder by a partition, a discharge port is arranged at the bottom of the unloading cylinder, feeding holes are arranged at both ends of the unloading cylinder, a feeding pipe is arranged at one end of the feeding hole, two groups of feeding pipes are connected through the first inner cylinder, the first inner cylinder includes two groups of cylinder fans, the cylinder fans are slidably installed inside the unloading cylinder, and a driving assembly connected to the two groups of cylinder fans is arranged inside the driving box. By controlling the movement of the cylinder fans to change the connection state of the feeding pipe, it can be ensured that the powder is unloaded in time when needed, and the problem of incomplete unloading caused by material inertia is effectively avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of conveying equipment, and in particular relates to a powder conveying device. Background Art

[0002] Potassium superoxide is an important alkali metal superoxide. Its physical properties are a light yellow powder with good adhesion, easy to bond under pressure, and good stability in sealed storage at room temperature. Potassium superoxide can produce oxygen when in contact with carbon dioxide exhaled by humans, so it is widely used as an oxygen regeneration agent for emergency rescue in coal mines.

[0003] Since potassium superoxide is a strong oxidant and can react chemically with many substances, special attention should be paid to avoid contact with combustibles, organic matter or reducing agents during transportation. In order to ensure safety, it is very necessary to take measures to transport in a closed pipeline, such as pneumatic transportation, pipe chain transportation, etc.

[0004] The Chinese utility model patent with publication number CN220683705U provides a tube chain machine that is easy to clean, including a pipeline, a drive box is fixedly installed on the upper right side of the pipeline, a centrifugal blower 1 is fixedly installed on the top of the drive box, a centrifugal blower 2 is fixedly installed on the left side of the drive box, a motor 1 is installed behind the centrifugal blower 1 and the centrifugal blower 2, and a motor 2 is fixedly installed behind the drive box.

[0005] In the above equipment, although the problem of brushes being difficult to clean fine dust is solved, there is still the problem of incomplete material discharge. The materials in the pipeline need to be completely discharged at the discharge port, but the material plate moves in the pipeline at a certain speed. Due to inertia, some powder will still be thrown into the pipeline after the discharge port and then sent to the drive box, which will not only affect the conveying efficiency, but also may cause damage to the equipment and even cause safety accidents. Summary of the invention

[0006] The purpose of the present invention is to provide a powder conveying device, aiming to solve the problem of incomplete material feeding.

[0007] In order to solve the above technical problems, the present invention provides a powder conveying device, comprising a closed annular body, a closed-loop chain is arranged inside the annular body, and a plurality of spaced material trays are arranged on the chain; a plurality of unloading mechanisms are arranged on the conveying pipeline of the annular body, each of the unloading mechanisms comprises a cylinder and a first inner cylinder, the cylinder is separated into an independent driving box and an unloading cylinder by a horizontally arranged partition, a discharge port is arranged at the bottom of the unloading cylinder, and feeding holes for connecting the conveying pipeline are arranged at both ends of the unloading cylinder, and one end of each feeding hole is provided with A feed pipe extending into the inner cavity of the discharge barrel is provided, and the two groups of feed pipes are connected by a first inner barrel. The first inner barrel includes two groups of buckled barrel fans, and the barrel fans are slidably installed inside the discharge barrel. A driving assembly connected to the two groups of barrel fans is provided inside the driving box. The driving assembly drives the two groups of barrel fans to move closer to or away from each other to achieve connection or disconnection of the feed pipe; the two groups of barrel fans approach each other, and the feed pipes at both ends are connected, and the powder passes the current discharge mechanism and flows to the next mechanism; the two groups of barrel fans move away from each other, and the connected feed pipes are disconnected, and the powder falls into the discharge barrel to achieve powder discharge.

[0008] Preferably, the driving assembly includes a rack and a servo motor, the servo motor is fixed to the upper end surface of the partition through a support frame, the motor shaft of the servo motor is fixed with a main gear, the rack is provided with two groups, the two groups of racks are staggered up and down and mesh with the main gear, guide rods corresponding to the racks are provided between the left and right inner walls of the driving box, the racks are slidably connected to the corresponding guide rods through a sliding seat, first bearing seats are fixed on the left and right inner walls of the driving box, each of the first bearing seats is equipped with a rotating shaft, the shaft body of the rotating shaft is fixed with a slave gear, the slave gear is meshed with the corresponding rack, a first connecting seat is provided in the middle of the outer wall of the barrel fan, a connecting rod is fixed to one end of the first connecting seat, and one end of the connecting rod is fixedly connected to the corresponding rack by passing through the partition.

[0009] Preferably, two groups of first guide seats are provided on the outer walls on both sides of the unloading barrel, and the outer wall of the barrel fan is provided with first guide columns corresponding to the first guide seats one by one. The first guide columns move through the first guide seats, and the first guide columns are sleeved with first springs, which abut between the outer wall of the barrel fan and the inner wall of the unloading barrel.

[0010] Preferably, an annular groove is provided at the end of the feed pipe, and pressure edges matching the annular groove are provided at the left and right ends of the two groups of barrel fans, guide grooves are provided at the upper and lower ends of one of the barrel fans, and guide blocks matching the guide grooves are provided at the upper and lower ends of the other barrel fan.

[0011] Preferably, the annular body includes a head box and a tail box, the tail box is connected to the head box through a conveying pipe, and the tail box includes a second box, both sides of the second box are slidably connected with bearing seats, a second rotating shaft is installed between the two groups of the second bearing seats, the second rotating shaft is fixed with a second sprocket engaged with the chain, each side of the bearing seat is provided with a side plate, a hydraulic cylinder is fixed to one end of the tail box, a connecting plate is fixed to the end of the push rod of the hydraulic cylinder, and connecting rods connected to the corresponding side plates are provided at both ends of the connecting plate.

[0012] Preferably, a tension monitoring mechanism is provided on the conveying pipeline, and a second in-place sensor opposite to the side vertical plate is provided on one side of the second box body. The monitoring result of the tension monitoring mechanism is linked to the action of the hydraulic cylinder, and the action stroke of the hydraulic cylinder is linked to the monitoring result of the second in-place sensor.

[0013] Preferably, the tension monitoring mechanism includes an outer cylinder and a second inner cylinder, the second inner cylinder is arranged inside the outer cylinder, the chain passes through the second inner cylinder, both ends of the outer cylinder are provided with material ports facing the second inner cylinder, the inner bottom of the outer cylinder is provided with a pressure sensor, the outer bottom of the second inner cylinder is provided with a second connecting seat connected to the pressure sensor, the outer bottom of the outer cylinder is provided with two groups of second guide seats, the outer wall of the second inner cylinder is provided with second guide columns corresponding to the second guide seats one by one, the second guide columns movably pass through the second guide seats, the second guide columns are sleeved with a second spring, and the second spring abuts between the outer wall of the second inner cylinder and the inner wall of the outer cylinder.

[0014] Preferably, the head box includes a first box body, a first rotating shaft is arranged inside the first box body, a motor connected to the first rotating shaft is fixed on one side of the head box, a first sprocket engaged with the chain is fixed on the shaft body of the first rotating shaft, and guide plates are fixed on both sides of the first sprocket and the second sprocket.

[0015] Preferably, the guide disc is trumpet-shaped, and a ring channel for supporting the material tray is formed between two groups of the guide discs, and the cross-section of the ring channel is semicircular.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are:

[0017] When the two sets of cylinder fans are close to each other, the feeding pipes at both ends are connected, and the powder can flow over the current unloading mechanism to the next mechanism to achieve continuous transportation. When unloading is required, the drive assembly drives the two sets of cylinder fans away from each other, so that the connected feeding pipes are disconnected. At this time, the powder can no longer be transported through the feeding pipe, but falls into the unloading barrel and is unloaded through the discharge port at the bottom. By controlling the movement of the cylinder fans to change the connection state of the feeding pipe, it can be ensured that the powder is unloaded in time when needed, effectively avoiding the problem of incomplete unloading due to material inertia. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the material unloading mechanism;

[0021] Figure 3 It is a structural schematic diagram of the lower barrel;

[0022] Figure 4 It is a schematic diagram of the internal structure of the blanking mechanism;

[0023] Figure 5 is a schematic diagram of the structure of the drive component;

[0024] Figure 6 is a schematic structural diagram of the first inner cylinder;

[0025] Figure 7 It is a structural diagram of the head box;

[0026] Figure 8 The figure is a schematic diagram of the internal structure of the head box;

[0027] Fig. 9 is a structural schematic diagram of a guide plate;

[0028] Fig.10 is a cross-sectional view of the guide plate;

[0029] Fig.11 It is a structural schematic diagram of the tail box;

[0030] Fig.12 It is a structural schematic diagram of the tension monitoring mechanism.

[0031] In the figure: 1-head box, 2-first material hole, 3-first material delivery pipeline, 4-second material delivery pipeline, 5-feeding mechanism, 6-tension monitoring mechanism, 7-third material hole, 8-tail box, 9-second material hole, 10-fourth material hole, 11-feeding port, 12-drive box, 13-discharging port, 14-feeding hole, 15-feeding barrel, 16-cover plate, 17-drive assembly, 18-feeding pipe, 19-first in-position sensor, 20-detection hole, 21-main gear, 22-partition plate, 23-first inner barrel, 24-rack, 25-guide rod, 26-slide seat, 27-servo motor, 28-first guide seat, 29-first connecting seat, 30-barrel fan, 3 1-first spring, 32-connecting rod, 33-guide block, 34-pressing edge, 35-annular groove, 36-guide groove, 37-first box, 38-motor, 39-chain, 40-material tray, 41-guide plate, 42-first rotating shaft, 43-first sprocket, 44-second box, 45-side vertical plate, 46-connecting rod, 47-hydraulic cylinder, 48-connecting plate, 49-second in-position sensor, 50-second rotating shaft, 51-bearing seat, 52-outer cylinder, 53-second inner cylinder, 54-material port, 55-second guide seat, 56-second guide column, 57-second connecting seat, 58-pressure sensor, 59-second spring, 60-first guide column. DETAILED DESCRIPTION

[0032] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0033] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] like Figure 1 , Figure 7 and Fig.11As shown, a powder conveying device provided by the present invention is composed of a head box 1 and a tail box 8, which are respectively located at the two ends of the device. The head box 1 includes a first box body 37, and the first box body 37 is provided with a first material hole 2 and a second material hole 9 connected to its inner cavity. The tail box 8 includes a second box body 44, and the second box body 44 is provided with a third material hole 7 and a fourth material hole 10 connected to its inner cavity. The first material hole 2 is connected to the third material hole 7 through a first material delivery pipeline 3, and the second material hole 9 is connected to the fourth material hole 10 through a second material delivery pipeline 4. These two material delivery pipelines, the head box 1 and the tail box 8 together form a closed-loop annular body, and a closed-loop chain 39 is provided inside the annular body, and a plurality of spaced material trays 40 are provided on the chain 39 to ensure continuous and stable transportation of powder inside the annular body.

[0035] A first rotating shaft 42 is arranged inside the first housing 37, a motor 38 fixedly connected to the first rotating shaft 42 is installed on one side of the head housing 1, and a first sprocket 43 engaged with the chain 39 is fixed to the shaft body of the first rotating shaft 42. Bearing seats 51 are slidably connected to both sides of the second housing 44 through a slide rail assembly, a second rotating shaft 50 is installed between the two sets of bearing seats 51, and a second sprocket engaged with the chain 39 is fixed to the shaft body of the second rotating shaft 50.

[0036] like Figures 8 to 10 As shown, guide plates 41 are fixed on both sides of the first sprocket 43 and the second sprocket. The guide plates 41 are trumpet-shaped, and a ring for supporting the material tray 40 is formed between the two sets of guide plates 41. The cross section of the ring is semicircular. The semicircular ring provides precise guidance for the material tray 40 during the conveying process, so that the chain 39 is always subject to certain constraints and guidance during the movement process. Even if there is a slight directional deviation, it can be corrected in time, thereby avoiding the risk of chain derailment.

[0037] like Figure 1 and Fig.12 As shown, the first material delivery pipeline 3 is provided with a tension monitoring mechanism 6 for monitoring the tension change of the chain 39, including an outer cylinder 52, a second inner cylinder 53 and a pressure sensor 58. Both ends of the outer cylinder 52 are provided with a material port 54 facing the second inner cylinder 53, which is convenient for the passage of the chain 39 and the connection of the pipeline. The second inner cylinder 53 is arranged inside the outer cylinder 52, and the chain 39 passes through the second inner cylinder 53. It serves as a channel for the chain 39 to pass through, and reflects the tension change of the chain 39 through its displacement. A pressure sensor 58 is provided at the inner bottom of the outer cylinder 52, and a second connecting seat 57 connected to the pressure sensor 58 is provided at the outer bottom of the second inner cylinder 53.

[0038] Two sets of second guide seats 55 are provided at the outer bottom of the outer cylinder 52, and second guide posts 56 corresponding to the second guide seats 55 are provided on the outer wall of the second inner cylinder 53. The second guide posts 56 move through the second guide seats 55 to provide stable guidance for the second inner cylinder 53 in the outer cylinder 52 to prevent it from being deflected due to force. The second guide posts 56 are sleeved with a second spring 59, which abuts between the outer wall of the second inner cylinder 53 and the inner wall of the outer cylinder 52 to provide elastic force for the second inner cylinder 53 to return to its original position when it is not subjected to tension from the chain 39.

[0039] When the tension of the chain 39 changes, the pressure applied by the tray 40 to the second inner cylinder 53 will also change, changing the position height of the second inner cylinder 53, and the force applied to the pressure sensor 58 will change accordingly. This change can be monitored and measured by the pressure sensor 58, thereby providing important data support for the operation and maintenance of the entire device.

[0040] A hydraulic cylinder 47 is fixed at one end of the second box 44, a connecting plate 48 is fixed at the end of the push rod of the hydraulic cylinder 47, connecting rods 46 connected to the corresponding side upright plates 45 are arranged at both ends of the connecting plate 48, and a second in-position sensor 49 facing the side upright plates 45 is arranged at one side of the second box 44. The monitoring result of the tension monitoring mechanism 6 is linked to the action of the hydraulic cylinder 47, and the action stroke of the hydraulic cylinder 47 is linked to the monitoring result of the second in-position sensor 49.

[0041] When the tension monitoring mechanism 6 detects that the tension change of the chain 39 exceeds the preset threshold, it will immediately send a signal to the control system. After receiving the signal sent by the tension monitoring mechanism 6, the control system will immediately analyze and judge. According to the judgment result, the control system will decide whether it is necessary to keep the tension of the chain 39 within a predetermined range by adjusting the action of the hydraulic cylinder 47. If adjustment is required, the control system will control the push rod of the hydraulic cylinder 47 to extend and retract, change the position of the second sprocket, and then adjust the state of the chain 39. According to the displacement calculated by the control system, when the hydraulic cylinder 47 reaches the predetermined position during the action, the second in-position sensor 49 will be triggered. The second in-position sensor 49 will send a signal to the control system, and the hydraulic cylinder 47 will stop moving to prevent the chain 39 from being too tight or too loose.

[0042] like Figures 1 to 6As shown, the second material delivery pipeline 4 is provided with a feed port 11 and a plurality of unloading mechanisms 5 with the same structure. The unloading mechanism 5 includes a cylinder body and a first inner cylinder 23. The cylinder body is separated into two independent spaces, a drive box 12 and a unloading cylinder 15, by a horizontally arranged partition 22. The top of the drive box 12 is covered with a cover plate 16. A discharge port 13 is provided at the bottom of the unloading cylinder 15. Both ends of the unloading cylinder 15 are provided with feeding holes 14 for connecting to the second material delivery pipeline 4. One end of each feeding hole 14 is provided with a feeding pipe 18 extending into the inner cavity of the unloading cylinder 15, and the two groups of feeding pipes 18 are connected through the first inner cylinder 23. The first inner cylinder 23 includes two groups of barrel fans 30 that are snap-fitted and installed. A driving assembly 17 that is driven and connected to the two groups of barrel fans 30 is provided inside the driving box 12. The driving assembly 17 drives the two groups of barrel fans 30 to move closer to or away from each other, thereby realizing the connection or disconnection of the feeding pipe 18.

[0043] Two sets of first guide seats 28 are provided on the outer walls of both sides of the unloading barrel 15, and first guide posts 60 corresponding to the first guide seats 28 are provided on the outer wall of the barrel fan 30. The first guide posts 60 move through the first guide seats 28 to guide the movement of the barrel fan 30 and ensure that the barrel fan 30 remains stable during the opening and closing process. The first guide posts 60 are sleeved with first springs 31, which abut between the outer wall of the barrel fan 30 and the inner wall of the unloading barrel 15.

[0044] The end of the feed pipe 18 is provided with an annular groove 35, and the left and right ends of the two sets of barrel fans 30 are provided with pressure edges 34 adapted to the annular groove 35, which are used to ensure the tight connection between the feed pipe 18 and the barrel fans 30. The upper and lower ends of one of the barrel fans 30 are provided with guide grooves 36, and the upper and lower ends of the other barrel fan 30 are provided with guide blocks 33 adapted to the guide grooves 36, which are used to ensure the alignment and stability of the two sets of barrel fans 30 during the opening and closing process.

[0045] like Figure 4 and Figure 5 As shown, the driving assembly 17 includes a rack 24 and a servo motor 27. The servo motor 27 is fixed to the upper end surface of the partition 22 through a support frame, and the motor shaft of the servo motor 27 is fixed with a main gear 21. There are two groups of racks 24, and the two groups of racks 24 are staggered up and down and mesh with the main gear 21. Between the left and right inner walls of the driving box 12, there are guide rods 25 corresponding to the racks 24. The racks 24 are slidably connected to the corresponding guide rods 25 through the slide 26 to ensure the stability of the racks 24 during the driving process. A first connecting seat 29 is provided in the middle of the outer wall of the barrel fan 30, and the first connecting seat 29 is fixedly connected to the corresponding rack 24 through a connecting rod 32 passing through the partition 22. A detection hole 20 facing one of the first connecting seats 29 is provided on the side wall of the unloading barrel 15, and a first in-position sensor 19 is installed on the detection hole 20 so as to detect the position or state of the barrel fan 30.

[0046] When the servo motor 27 is started, its motor shaft drives the main gear 21 to rotate. The rotation of the main gear 21 drives the two sets of racks 24 to slide along the guide rod 25 in opposite directions, which is then converted into linear motion of the cylinder fan 30 through the connecting rod 32, thereby realizing the opening and closing of the cylinder fan 30. When the two sets of cylinder fans 30 are close to each other, the feeding pipes 18 at both ends are connected, and the powder can flow over the current unloading mechanism 5 to the next unloading mechanism 5 or other mechanisms to achieve continuous transportation. When the two sets of cylinder fans 30 are away from each other, the connected feeding pipes 18 are disconnected. At this time, the powder can no longer be transported through the feeding pipe 18, but falls into the unloading barrel 15 and is unloaded through the discharge port 13 at the bottom.

[0047] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A powder conveying device, comprising a closed-loop annular body, a closed-loop chain (39) is arranged inside the annular body, and a plurality of material trays (40) are arranged at intervals on the chain (39); characterized in that: A plurality of unloading mechanisms (5) are arranged on the conveying pipeline of the annular body, each of the unloading mechanisms (5) comprises a cylinder and a first inner cylinder (23), the cylinder is separated into an independent driving box (12) and an unloading cylinder (15) by a horizontally arranged partition (22), a discharge port (13) is arranged at the bottom of the unloading cylinder (15), both ends of the unloading cylinder (15) are provided with feeding holes (14) for connecting to the conveying pipeline, and one end of each feeding hole (14) is provided with a A feeding tube (18), two groups of the feeding tubes (18) are connected via a first inner tube (23), the first inner tube (23) comprises two groups of barrel fans (30) which are mounted in a snap-fitting manner, the barrel fans (30) are slidably mounted inside the lower barrel (15), a driving assembly (17) which is drivingly connected to the two groups of barrel fans (30) is disposed inside the driving box (12); the driving assembly (17) comprises a rack (24) and a servo motor (27), the servo motor (27) is fixed to the upper end surface of the partition (22) via a support frame, the The motor shaft of the servo motor (27) is fixed with a main gear (21), two groups of racks (24) are provided, the two groups of racks (24) are staggered and arranged up and down and mesh with the main gear (21), guide rods (25) corresponding to the racks (24) are provided between the left and right inner walls of the drive box (12), the racks (24) are slidably connected to the corresponding guide rods (25) through a sliding seat (26), a first connecting seat (29) is provided in the middle of the outer wall of the barrel fan (30), and a connecting rod ( 32), one end of the connecting rod (32) is fixedly connected to the corresponding rack (24) by passing through the partition (22); the driving component (17) drives the two groups of cylinder fans (30) to move closer to or farther away from each other, thereby realizing the connection or disconnection of the feeding pipe (18); the two groups of cylinder fans (30) move closer to each other, the feeding pipes (18) at both ends are connected, and the powder passes through the current unloading mechanism (5) and flows to the next mechanism; the two groups of cylinder fans (30) move away from each other, the connected feeding pipes (18) are disconnected, and the powder falls into the unloading barrel (15), thereby realizing the powder unloading.

2. The powder conveying device according to claim 1, characterized in that: Two sets of first guide seats (28) are provided on the outer walls of both sides of the unloading barrel (15), and the outer wall of the barrel fan (30) is provided with a first guide column (60) corresponding to the first guide seat (28) one by one. The first guide column (60) moves through the first guide seat (28), and the first guide column (60) is sleeved with a first spring (31), and the first spring (31) abuts between the outer wall of the barrel fan (30) and the inner wall of the unloading barrel (15).

3. The powder conveying device according to claim 2, characterized in that: An annular groove (35) is provided at the end of the feed pipe (18), and pressing edges (34) adapted to the annular groove (35) are provided at both left and right ends of the two groups of barrel fans (30), and guide grooves (36) are provided at both upper and lower ends of one of the barrel fans (30), and guide blocks (33) adapted to the guide grooves (36) are provided at both upper and lower ends of the other barrel fan (30).

4. The powder conveying device according to claim 1, characterized in that: The annular body comprises a head box (1) and a tail box (8), wherein the tail box (8) is connected to the head box (1) via a conveying pipeline, and the tail box (8) comprises a second box (44), both sides of the second box (44) are slidably connected with bearing seats (51), a second rotating shaft (50) is installed between the two groups of the bearing seats (51), the shaft body of the second rotating shaft (50) is fixed with a second sprocket engaged with the chain (39), and one side of the bearing seat (51) is provided with a side plate (45), one end of the tail box (8) is fixed with a hydraulic cylinder (47), the end of the push rod of the hydraulic cylinder (47) is fixed with a connecting plate (48), and both ends of the connecting plate (48) are provided with connecting rods (46) connected to the corresponding side plates (45).

5. The powder conveying device according to claim 4, characterized in that: The conveying pipeline is provided with a tension monitoring mechanism (6), and a second in-position sensor (49) opposite to the side vertical plate (45) is provided on one side of the second box body (44). The monitoring result of the tension monitoring mechanism (6) is linked to the action of the hydraulic cylinder (47), and the action stroke of the hydraulic cylinder (47) is linked to the monitoring result of the second in-position sensor (49).

6. The powder conveying device according to claim 5, characterized in that: The tension monitoring mechanism (6) comprises an outer cylinder (52) and a second inner cylinder (53), the second inner cylinder (53) being arranged inside the outer cylinder (52), the chain (39) passing through the second inner cylinder (53), both ends of the outer cylinder (52) being provided with material ports (54) facing the second inner cylinder (53), the inner bottom of the outer cylinder (52) being provided with a pressure sensor (58), the outer bottom of the second inner cylinder (53) being provided with a second connecting seat (57) connected to the pressure sensor (58), the outer bottom of the outer cylinder (52) being provided with two groups of second guide seats (55), the outer wall of the second inner cylinder (53) being provided with second guide posts (56) corresponding to the second guide seats (55) in a one-to-one manner, the second guide posts (56) movably passing through the second guide seats (55), the second guide posts (56) being sleeved with a second spring (59), the second spring (59) being abutted between the outer wall of the second inner cylinder (53) and the inner wall of the outer cylinder (52).

7. The powder conveying device according to claim 4, characterized in that: The head box (1) comprises a first box body (37), a first rotating shaft (42) is arranged inside the first box body (37), a motor (38) connected to the first rotating shaft (42) is fixed on one side of the head box (1), a first sprocket (43) engaged with the chain (39) is fixed on the shaft body of the first rotating shaft (42), and guide plates (41) are fixed on both sides of the first sprocket (43) and the second sprocket.

8. The powder conveying device according to claim 7, characterized in that: The guide disc (41) is trumpet-shaped, and a ring channel for supporting the material tray (40) is formed between two groups of the guide discs (41), and the cross section of the ring channel is semicircular.

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