An automated PTA feeding device

Abstract

The present invention relates to the field of automatic feeding, in particular to a PTA automatic feeding device, which includes a frame body. The surface of the frame body is vertically provided with a feeding bin with the ground surface as the center of gravity. A sealed door is arranged on the surface of the feeding bin. A diversion pipe is arranged at the end of the feeding bin close to the ground surface. A transmission mechanism is arranged on the frame body and at the end far from the ground surface. In the working state, it is used to convey and transport the material bags. A driving mechanism, the driving mechanism includes a first driving motor arranged inside the feeding bin. Through the arrangement of a conveying pipe body and a cylindrical stopper, a negative pressure suction force is generated at the opening of the material bag when the material bag for feeding is below, so as to open the bag mouth, achieving the effect of quickly opening the bag mouth, facilitating the feeding of the bag mouth between the connecting piece and the annular elastic cord, and facilitating clamping, solving the problem that manual opening of the bag mouth is still required in the prior art, reducing the time for workers to open the bag mouth, and thus improving work efficiency.

Description

Technical Field

[0001] The present invention relates to the field of automatic feeding, and particularly to a PTA automatic feeding device. Background Art

[0002] Purified Terephthalic Acid (PTA) is an important organic chemical raw material, which is widely used in the synthesis of polyethylene terephthalate (PET), a polymer material widely used in fibers, plastics, and packaging materials. PTA is usually white crystals or powders with a small particle size;

[0003] During the process of processing PTA, tube chain transportation is required. Before that, PTA needs to be put into the tube chain through a feeding device. Usually, the material is placed in a ton bag, and the material in the ton bag is discharged through the feeding device;

[0004] Currently, a bag clamping device is required during the feeding process of PTA, that is, the bottom opening bag wall of the ton bag is clamped at the feeding port, so as to effectively avoid excessive dust and material overflow during feeding. The existing bag clamping devices are mostly annular clamping plates. First, the clamping plate is moved upward, the bag mouth is passed through the central ring of the clamping plate, and is stretched out around, ensuring that the annular clamping plate moves downward to clamp the bag mouth stretched out around (as Figure 1 shown, which shows the feeding device in the prior art, including a bag mouth opening 600, a bag mouth 700, a clamping plate 800, and a fixed seat 900. The fixed seat 900 and the clamping plate 800 are fixedly connected. The bag mouth 700 is above the clamping plate 800. The bag mouth opening 600 connected to the bag mouth 700 passes through the clamping plate 800 and is below the clamping plate 800. The fixed seat 900 spreads the bag mouth opening 600. The shape of the bag mouth 700 close to the ground is trumpet-shaped, the trumpet-shaped opening is circular, and the trumpet-shaped narrow mouth is tied with a rope before feeding. The bag opening passes through the clamping plate 800 and is above the fixed seat 900 for feeding), but due to the stretchability of the bag body, different bag mouth sizes, and the fixed size of the annular clamping plate, when there are wrinkles and bag folding situations due to a large bag mouth, it is inconvenient for the clamping plate to clamp and seal the bag mouth, and it is easy to squeeze and occupy the internal space of the bag mouth, resulting in the obstruction of the feeding process. If the bag mouth is small, it is easy to tear the bag body, and the process of stretching the bag mouth during bag clamping is labor-consuming, resulting in low feeding efficiency. Summary of the Invention

[0005] In view of the problem of low feeding efficiency and difficult bag mouth opening in the above or prior art, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a PTA automatic feeding device.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: A PTA automatic feeding device, including a frame body, on the surface of the frame body, with the ground surface as the center of gravity, a feeding bin is vertically arranged, a sealed door is arranged on the surface of the feeding bin, a diversion pipe is arranged at the end of the feeding bin close to the ground surface, a transmission mechanism is arranged on the frame body and at the end far from the ground surface, and in the working state, it is used to convey and transport the material bags. A driving mechanism, the driving mechanism includes a first driving motor arranged inside the feeding bin, the output end of the first driving motor is fixedly connected with a first small gear, a negative pressure mechanism, the negative pressure mechanism includes a conveying pipe body arranged above the first driving motor inside the feeding bin, one end of the conveying pipe body penetrates through the feeding bin to its outer surface, the other end of the conveying pipe body is circular and annular, and a plurality of groups of air guide holes are arranged inside the circular and annular part of the conveying pipe body. A cylindrical stopper is arranged on the surface of the conveying pipe body in a fitting manner with its circular and annular part. A coordination component is arranged on the surface of the cylindrical stopper with the axis of the cylindrical stopper as the center, and in the working state, it is used to tighten the outer surface of the material bag. A synchronization mechanism is arranged at the inner bottom of the feeding bin coaxially with the cylindrical stopper, and is used to expand the inner surface of the material bag outward.

[0008] As a preferred scheme of a PTA automatic feeding device of the present invention, wherein: the transmission mechanism includes a frame arranged on the frame body, a second driving motor is fixedly connected to the surface of the frame, the output end of the second driving motor is fixedly connected with a coordination rod, a running block is arranged on the surface of the coordination rod, a loading body is arranged on the surface of the running block, a third driving motor is fixedly connected to the surface of the loading body, the output end of the third driving motor is fixedly connected with a roller, and a hook rope is arranged on the surface of the roller.

[0009] As a preferred scheme of a PTA automatic feeding device of the present invention, wherein: the running block slides on the surface of the coordination rod and is restricted by the frame, and the coordination rod is rotatably connected to the frame.

[0010] As a preferred scheme of a PTA automatic feeding device of the present invention, wherein: the coordination component includes an orientation block arranged on the cylindrical stopper, an arc-shaped carrier is rotatably connected inside the orientation block, an annular elastic rope is arranged inside the arc-shaped carrier, and a trigger rod is arranged at the end of the arc-shaped carrier close to the diversion pipe.

[0011] As a preferred scheme of a PTA automatic feeding device of the present invention, wherein: the synchronization mechanism includes a first large gear arranged at the inner bottom of the feeding bin, a plurality of groups of arc-shaped notches are arranged on the surface of the first large gear with the cylindrical stopper as the axis, a connecting piece is slidably connected inside each arc-shaped notch, a limiting plate is fixedly connected to the surface of the connecting piece, and triangular touch plates corresponding to the number of trigger rods are also arranged on the surface of the first large gear.

[0012] As a preferred solution of the PTA automatic feeding device of the present invention, the limit plate slides inside the cylindrical baffle.

[0013] As a preferred solution of a PTA automatic feeding device of the present invention, the connecting part includes a limiting column slidably connected to the inside of an arc groove, an extension block is arranged on the surface of the limiting column, an arc plate body is fixedly connected to the surface of the extension block, a clamping plate is arranged on the surface of the arc plate body, an arc groove for a circular elastic rope to fit into is opened on the surface of the clamping plate, and a sensor is arranged inside the clamping plate.

[0014] As a preferred solution of the PTA automatic feeding device of the present invention, the first small tooth and the first large tooth are on the same horizontal line, and the first large tooth and the first small tooth are meshed.

[0015] The beneficial effects of the PTA automatic feeding device of the present invention are as follows: through the arrangement of the conveying tube body and the columnar baffle body, when the feeding material bag is moved downward, negative pressure suction is generated on the opening of the material bag, the bag opening is opened, and the effect of quickly opening the bag opening is achieved, and the bag opening is conveniently fed between the connecting piece and the annular elastic rope for convenient clamping, which solves the problem of manually opening the bag opening in the prior art, reduces the time for workers to open the bag opening, and thus improves work efficiency;

[0016] Furthermore, through the setting of the negative pressure mechanism and the synchronization mechanism, when the bag opening is opened, the inside of the bag is attached to the surface of the connecting piece. Due to different batches of PTA materials, the volume of the bags is different. The connecting piece can expand outward according to the bag openings of different sizes, so that the PTA materials can be dropped better.

[0017] Furthermore, the arc plate and the card plate can fully open the bag opening when the feeding material bag is expanding outward, and at the same time, the folds inside the feeding bag can be folded and unfolded, so as to avoid occupying the internal space of the bag opening and increase the sealing of the feeding. In addition, when the material is about to be put in, if the bag opening is not tightened, the bag opening will vibrate to a certain extent, causing the material to scatter out. The cooperation of the annular elastic rope and the arc surface groove can prevent the bag opening from scattering when the material is about to be put in.

[0018] Furthermore, through the setting of the synchronization mechanism and the driving mechanism, while the material is being dropped, the connecting parts continue to move away from the coaxial center, and the dropped material will become deflated due to the decrease in internal material. The material in the bag will accumulate in the bag due to the deflation of the bag, resulting in undropped residue. At this time, the connecting parts will simultaneously expand outward to tighten the bag and quickly drop out the remaining material. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of an existing device of a PTA automatic feeding device.

[0021] Figure 2 It is an overall schematic diagram of a PTA automatic feeding device.

[0022] Figure 3 It is a transmission mechanism of a PTA automatic feeding device.

[0023] Figure 4 It is a driving mechanism structure of a PTA automatic feeding device.

[0024] Figure 5 It is a partial disassembly of the negative pressure mechanism of a PTA automatic feeding device.

[0025] Figure 6 It is the disassembly and partial closing of the connecting parts of a PTA automatic feeding device.

[0026] Figure 7 It is a schematic diagram of the negative pressure mechanism and the synchronization mechanism of a PTA automatic feeding device.

[0027] In the figure: 100, frame; 101, feeding bin; 102, airtight door; 103, shunt pipe; 200, transmission mechanism; 201, frame; 202, second driving motor; 203, coordination rod; 204, running block; 205, carrier; 206, third driving motor; 207, hook rope; 300, driving mechanism; 301, first driving motor; 302, first small gear; 400, negative pressure mechanism; 401, conveying pipe body; 402, air guide hole; 403, cylindrical baffle; 41, coordination component; 410, directional block; 411, arc carrier; 412, annular elastic rope; 413, trigger rod; 500, synchronization mechanism; 501, first large gear; 502, arc slot; 503, connecting part; 5031, limiting column; 5032, extension block; 5033, arc plate; 5034, clamping plate; 5035, arc surface slot; 504, limiting plate; 505, triangular contact plate; 600, bag mouth opening; 700, bag mouth; 800, clamping plate; 900, fixed seat. Detailed implementation manners

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] Example 1, reference Figures 2 to 7 , is the first embodiment of the present invention, which provides a PTA automatic feeding device, including a frame 100, the surface of the frame 100 is vertically provided with a feed bin 101 with the ground as the center of gravity, the surface of the feed bin 101 is provided with a closed door 102, the end of the feed bin 101 close to the ground is provided with a shunt pipe 103, a transmission mechanism 200, which is arranged on the frame 100 and at the end away from the ground, and is used to transport the material bags in the working state, a driving mechanism 300, the driving mechanism 300 includes a first driving motor 301 arranged inside the feed bin 101, the output end of the first driving motor 301 is fixedly connected with a first small tooth 302, a negative pressure mechanism 400, and the negative pressure mechanism 400 includes The conveying tube body 401 is arranged in the feeding bin 101 above the first driving motor 301, one end of the conveying tube body 401 passes through the feeding bin 101 to its outer surface, the other end of the conveying tube body 401 is circular, and a plurality of groups of air guide holes 402 are opened inside the circular ring of the conveying tube body 401, a cylindrical baffle 403 is arranged on the surface of the conveying tube body 401 in contact with its circular ring, a coordination component 41 is arranged on the surface of the cylindrical baffle 403 with the axis of the cylindrical baffle 403 as the center, and is used to tighten the outer surface of the material bag in the working state, and a synchronization mechanism 500 is arranged on the inner bottom of the feeding bin 101 coaxially with the cylindrical baffle 403, and is used to expand the inner surface of the material bag outward.

[0030] like Figure 1 As shown, a feeding device in the prior art is demonstrated, including a bag opening 600, a bag opening 700, a splint 800, and a fixing seat 900. The fixing seat 900 and the splint 800 are fixedly connected. The bag opening 700 is above the splint 800. The bag opening 600 connected to the bag opening 700 passes through the splint 800 and is below the splint 800. The fixing seat 900 props open the bag opening 600.

[0031] During use, the air guide hole 402 is obliquely opened on the circular ring portion of the conveying tube body 401, so as to match the diving angle of the material bag being fed.

[0032] It should be noted that at one end of the transfer pipe body 401 where it penetrates into the feed bin 101 to its outer surface, equipment such as a centrifugal fan, a vacuum pump, and a compressor that can actively generate negative pressure can be installed to provide a negative pressure attraction. This installation is to better enable the transfer pipe body 401 to generate negative pressure through several groups of air guide holes 402 when the material bag is placed at the gap between the cylindrical baffle 403 and the connector 503, so as to adsorb the outer surface of the material bag, thereby reducing the manual opening time and improving efficiency. In actual use, an industrial blowing and suction fan can also be installed at this end of the transfer pipe body 401. In this way, not only can the outer surface opening of the material bag be adsorbed and opened, but after the feeding is completed, the industrial blowing and suction fan can also send air into the interior of the transfer pipe body 401, and then send the air out through the air guide holes 402, and then blow the PTA particles and dust that have not been sent out in the feeding and discharging area to achieve a cleaning effect.

[0033] Referring to Figure 3 , the transmission mechanism 200 includes a frame 201 provided on the frame body 100. A second driving motor 202 is fixedly connected to the surface of the frame 201. The output end of the second driving motor 202 is fixedly connected to a coordination rod 203. A running block 204 is arranged on the surface of the coordination rod 203. A loading body 205 is arranged on the surface of the running block 204. A third driving motor 206 is fixedly connected to the surface of the loading body 205. The output end of the third driving motor 206 is fixedly connected to a roller, and a hook rope 207 is arranged on the surface of the roller.

[0034] During the use process, it is necessary to first drive the coordination rod 203 to work through the second driving motor 202. When the coordination rod 203 works, it will drive the running block 204 to move away from the second driving motor 202. Then, the material bag is hung up through the hook rope 207. Subsequently, the second driving motor 202 drives the coordination rod 203 to move in the reverse direction, making the running block 204 approach the second driving motor 202. When the material bag is perpendicular to the interior of the feed bin 101, the third driving motor 206 starts to work and lowers the hook rope 207 to the cylindrical baffle 403 on the negative pressure mechanism 400.

[0035] The running block 204 slides on the surface of the coordination rod 203 and is restricted by the frame 201. The coordination rod 203 is rotatably connected to the frame 201.

[0036] The coordination assembly 41 includes an orienting block body 410 arranged on the cylindrical baffle 403. An arc-shaped carrier 411 is rotatably connected to the interior of the orienting block body 410. A ring-shaped elastic rope 412 is arranged in the interior of the arc-shaped carrier 411. A trigger rod 413 is arranged at the end of the arc-shaped carrier 411 close to the shunt pipe 103.

[0037] During use, the directional block 410 is installed on the surface of the cylindrical stopper 403. When the trigger rod 413 inclines close to the surface of the cylindrical stopper 403, the arc-shaped carrier 411 will be driven by the trigger rod 413 and expand away from the axis of the cylindrical stopper 403, while driving the annular elastic cord 412 to expand. When the trigger rod 413 is not stressed, the annular elastic cord 412 will quickly pull the arc-shaped carrier 411 inward. At this time, the radius of the annular elastic cord 412 becomes shorter when the trigger rod 413 is not stressed.

[0038] It should be noted that when the trigger rod 413 is not stressed, the annular elastic cord 412 will tighten towards the axis of the cylindrical stopper 403 and then fit onto the arc-shaped notch 5035. At this time, the inside of the material bag fits onto the connecting piece 503, while the outside will be fastened by the annular elastic cord 412 inside the arc-shaped notch 5035, preventing the opening of the material bag from shaking due to the falling of PTA particles during feeding, which may cause the material bag to shake and the material bag opening to shake, spilling out and scattering the PTA particles.

[0039] The synchronization mechanism 500 includes a first large gear 501 arranged at the inner bottom of the feeding bin 101. The surface of the first large gear 501 is provided with a plurality of groups of arc-shaped notches 502 centered on the cylindrical stopper 403. Each arc-shaped notch 502 is slidably connected with a connecting piece 503 inside. The surface of the connecting piece 503 is fixedly connected with a limiting plate 504. The surface of the first large gear 501 is also provided with triangular trigger plates 505 corresponding to the number of trigger rods 413.

[0040] The limiting plate 504 slides inside the cylindrical stopper 403.

[0041] The connecting piece 503 includes a limiting cylinder 5031 slidably connected inside the arc-shaped notch 502. The surface of the limiting cylinder 5031 is provided with an extended block 5032. The surface of the extended block 5032 is fixedly connected with an arc-shaped plate 5033. The surface of the arc-shaped plate 5033 is provided with a clamping plate 5034. The surface of the clamping plate 5034 is provided with an arc-shaped notch 5035 for the annular elastic cord 412 to fit. A sensor is arranged inside the clamping plate 5034.

[0042] During use, the directional block 410 is installed on the surface of the cylindrical stopper 403. When the trigger rod 413 inclines close to the surface of the cylindrical stopper 403, the arc-shaped carrier 411 will be driven by the trigger rod 413 and expand away from the axis of the cylindrical stopper 403, while driving the annular elastic cord 412 to expand. When the trigger rod 413 is not stressed, the annular elastic cord 412 will quickly pull the arc-shaped carrier 411 inward. At this time, the radius of the annular elastic cord 412 becomes shorter when the trigger rod 413 is not stressed.

[0043] It should be noted that when the trigger lever 413 is not under force, the annular elastic cord 412 will tighten towards the axis of the cylindrical stopper 403 and then fit against the arc-shaped notch 5035. At this time, the inside of the material bag fits on the connecting member 503, while the outside is fastened by the annular elastic cord 412 inside the arc-shaped notch 5035, preventing the opening of the material bag from shaking due to the falling of PTA particles during feeding, which may cause the material to shake and the bag opening to shake, resulting in the spilling of PTA particles. A sensor is provided inside the clamping plate 5034. When the clamping plate 5034 expands outwards, the sensor detects the force received by the clamping plate 5034 in real time. The set force is less than the pressure value for bag opening tearing. When the clamping plate 5034 receives the maximum force, the sensor transmits the data to the first driving motor 301. At this time, the first driving motor 301 stops working to avoid excessive force causing the bag body to be torn and damaged, resulting in the scattering of the material.

[0044] The first small gear 302 and the first large gear 501 are on the same horizontal line, and the first large gear 501 meshes with the first small gear 302.

[0045] The first working principle:

[0046] First, the operator hangs the feeding bag on the hook rope 207. Subsequently, the second driving motor 202 drives the coordination rod 203 to move the running block 204 towards the frame body 100. When the feeding bag moves to a suitable position, the operator controls the third driving motor 206 to place it below the hook rope 207. Then, the fed material bag drops, and the conveying pipe body 401 starts to work, adsorbing the opening of the material bag to open the opening of the material bag. Subsequently, the first driving motor 301 drives the first small gear 302 to start working. The first small gear 302 drives the first large gear 501 to rotate counterclockwise, and the connecting piece 503 starts to move closer synchronously. The limiting cylinder 5031 inside the arc notch 502 starts to move towards the coaxial center until the maximum formation, that is, the two ends of each arc plate body 5033 are mutually attached to form a relatively airtight space. Subsequently, the negative pressure mechanism 400 disengages from the triangular contact plate 505, and the trigger rod 413 does not contact the triangular contact plate 505. At this time, the annular elastic rope 412 inside the arc-shaped carrier 411 tightens inward, fitting against the arc surface notch 5035, clamping the bag to make the bag relatively airtight with the lower feeding space. When the connecting piece 503 is working, the limiting plate 504 on the connecting piece 503 will slide inside the cylindrical stopper 403 and limit the connecting piece 503. When clamping the feeding bag, the operator unties the rope on the feeding bag, and the PTA in the bag starts to be fed into the feeding bin 101. When fed to a certain extent, the two sides of the bag will become deflated. At this time, the first driving motor 301 drives the first small gear 302 in the reverse direction to make the first large gear 501 start to work. Each clamping plate 5034 starts to move away from each other, expanding outward, to secondarily expand the deflated bag opening, and at the same time straighten the stretched wrinkles and gaps inside the bag. Subsequently, the remaining material is fed downward until the feeding is completed;

[0047] Second working principle:

[0048] That is, when only a part of the large material bag needs to be fed and the feeding bag is relatively small, the above work is repeated. However, the difference is that at this time, the clamping plates 5034 move away from each other and then move closer to each other. Until the two ends of all the arc plate bodies 5033 are mutually attached, that is, when the feeding index required for the material is completed, the mutual approach of the clamping plates 5034 will make the feeding diameter of the material shorter and the feeding speed shorter. When the clamping plates 5034 approach and fit against each other, tie the opening of the feeding bag close to the ground with a rope. Subsequently, the feeding bag is sent back to a distance through the transmission mechanism 200. At this time, close the airtight door 102 and use the conveying pipe body 401 to send air into the air guide hole 402, which is sent obliquely upward from the air guide hole 402 to blow the inside of the cavity of the feeding bin 101 to complete the cleaning. Thus, all the operation steps are completed. Under special conditions, for example, when the material PTA is packaged, there may still be a layer of plastic film for protecting the material PTA inside the bag. At this time, the operator needs to cut open the plastic film inside the bag opening after the bag opening is expanded, that is, (cut open the plastic film from the gap formed by each unfolded clamping plate 5034).

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An automated PTA feeding device, characterized in that: including; a frame body (100), on the surface of the frame body (100) with the ground surface as the center of gravity, a feeding bin (101) is vertically arranged, a sealing door (102) is arranged on the surface of the feeding bin (101), and a shunt pipe (103) is arranged at the end of the feeding bin (101) close to the ground surface; a transmission mechanism (200), arranged on the frame body (100) and at the end far from the ground surface, and is used for conveying and transporting material bags in a working state; a driving mechanism (300), the driving mechanism (300) includes a first driving motor (301) arranged inside the feeding bin (101), and a first small gear (302) is fixedly connected to the output end of the first driving motor (301); a negative pressure mechanism (400), the negative pressure mechanism (400) includes a conveying pipe body (401) arranged above the first driving motor (301) inside the feeding bin (101), one end of the conveying pipe body (401) penetrates through the feeding bin (101) to its outer surface, the other end of the conveying pipe body (401) is circular ring-shaped, and a plurality of groups of air guide holes (402) are opened inside the circular ring-shaped part of the conveying pipe body (401), and a cylindrical baffle (403) is arranged on the surface of the conveying pipe body (401) in a fitting manner with its circular ring-shaped part; a coordination component (41), centered on the axis of the cylindrical baffle (403), is arranged on the surface of the cylindrical baffle (403), and is used for tightening the outer surface of the material bag in a working state. The coordination component (41) includes an orientation block (410) arranged on the cylindrical baffle (403), an arc-shaped carrier (411) is rotatably connected inside the orientation block (410), an annular elastic rope (412) is arranged inside the arc-shaped carrier (411), and a trigger rod (413) is arranged at the end of the arc-shaped carrier (411) close to the shunt pipe (103); a synchronization mechanism (500), coaxially arranged with the cylindrical baffle (403) at the inner bottom of the feeding bin (101), is used for expanding the inner surface of the material bag. The synchronization mechanism (500) includes a first large gear (501) arranged at the inner bottom of the feeding bin (101), a plurality of groups of arc-shaped notches (502) are opened on the surface of the first large gear (501) with the cylindrical baffle (403) as the axis, a connecting member (503) is slidably connected inside each arc-shaped notch (502), a limiting plate (504) is fixedly connected to the surface of the connecting member (503), and a triangular contact plate (505) corresponding to the number of trigger rods (413) is also arranged on the surface of the first large gear (501), and the limiting plate (504) slides inside the cylindrical baffle (403); The connecting member (503) includes a limiting cylinder (5031) slidably connected to the inside of the arc notch (502). An extension block (5032) is provided on the surface of the limiting cylinder (5031). An arc plate (5033) is fixedly connected to the surface of the extension block (5032). A clamping plate (5034) is provided on the surface of the arc plate (5033). An arc notch (5035) for the annular elastic cord (412) to fit is formed on the surface of the clamping plate (5034). A sensor is provided inside the clamping plate (5034).

2. The PTA automatic feeding device according to claim 1, wherein: The transmission mechanism (200) includes a frame (201) provided on the frame body (100). A second driving motor (202) is fixedly connected to the surface of the frame (201). The output end of the second driving motor (202) is fixedly connected to a coordination rod (203). A running block (204) is provided on the surface of the coordination rod (203). A loading body (205) is provided on the surface of the running block (204). A third driving motor (206) is fixedly connected to the surface of the loading body (205). The output end of the third driving motor (206) is fixedly connected to a roller. A hook cord (207) is provided on the surface of the roller.

3. The PTA automatic feeding device according to claim 2, wherein: The running block (204) slides on the surface of the coordination rod (203) and is restricted by the frame (201). The coordination rod (203) is rotatably connected to the frame (201).

4. The PTA automatic feeding device according to claim 1, characterized in that: The first small gear (302) and the first large gear (501) are on the same horizontal line, and the first large gear (501) meshes with the first small gear (302).

5. The PTA automatic feeding device according to claim 1, characterized in that: One end of the conveying pipe body (401) penetrates into the feeding bin (101) to its outer surface.

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