Automatic PTA (pure terephthalic acid) feeding device

Abstract

The invention relates to the field of automatic feeding, in particular to a PTA automatic feeding device which comprises a frame body, a feeding bin is vertically arranged on the surface of the frame body with the earth surface as the gravity center, a sealing door is arranged on the surface of the feeding bin, a flow dividing pipe and a conveying mechanism are arranged at the end, close to the earth surface, of the feeding bin, and the conveying mechanism is arranged at the end, away from the earth surface, of the frame body. In the working state, the conveying mechanism is used for conveying and transporting a material bag, the driving mechanism comprises a first driving motor arranged in the feeding bin, through the arrangement of a conveying pipe body and a cylindrical blocking body, negative pressure suction force is generated at an opening of the material bag when the fed material bag moves downwards, the bag opening is opened, and the effect of rapidly opening the bag opening is achieved; the bag opening can be conveniently fed between the connecting piece and the annular elastic rope, clamping is convenient, the problem that in the prior art, the bag opening needs to be manually unfolded is solved, the time for workers to open the bag opening is shortened, and then the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of automatic feeding, in particular to a PTA automatic feeding device. Background Art

[0002] Purified Terephthalic Acid (PTA) is an important organic chemical raw material, widely used in the synthesis of polyethylene terephthalate (PET), a polymer material widely used in fibers, plastics and packaging materials. Phthalic acid is usually white crystals or powders with small particle size. In the process of processing PTA, pipe chain transportation is required. Before that, PTA needs to be put into the pipe chain through a feeding device. Usually, the material is placed in a ton bag, and the material in the ton bag is unloaded through the feeding device; At present, the PTA feeding process requires a bag clamping device, that is, the bag wall at the bottom of the ton bag is clamped at the feeding port, so that the problem of excessive dust and material overflow can be effectively avoided during feeding. The existing bag clamps are mostly annular clamps. First, move the clamp upward, pass the bag opening through the center ring of the clamp, and stretch it out to the surroundings, ensuring that the annular clamp moves downward to clamp the bag opening stretched out to the surroundings (such as Figure 1 As shown, a feeding device in the prior art is shown, including a bag opening 600, a bag opening 700, a clamping plate 800, and a fixing seat 900. The fixing seat 900 and the clamping plate 800 are fixedly connected. The bag opening 700 is located above the clamping plate 800. The bag opening 600 connected to the bag opening 700 passes through the clamping plate 800 and is located below the clamping plate 800. The fixing seat 900 props up the bag opening 600. The bag opening 700 close to the ground is in the shape of a trumpet. The trumpet-shaped opening is circular, and the trumpet-shaped narrow mouth is at Before feeding, the bag is tied with a rope, and the bag opening passes through the clamp 800 to the top of the fixed seat 900 for feeding). However, due to the extensibility of the bag body, the different sizes of different bag openings, and the fixed size of the annular clamp, when wrinkles and folds occur due to the large bag opening, the clamp is inconvenient to clamp and seal the bag opening, and it is easy to squeeze and occupy the internal space of the bag opening, which hinders the feeding process. If the bag opening is small, the bag body is easy to tear, and the process of clamping and stretching the bag opening is more labor-intensive, resulting in low feeding efficiency. Summary of the invention

[0003] In view of the problems of low feeding efficiency and difficulty in opening the bag mouth in the above or prior art, the present invention is proposed.

[0004] Therefore, the object of the present invention is to provide a PTA automatic feeding device.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a PTA automatic feeding device, comprising a frame, the surface of the frame is centered on the ground, a feed bin is vertically arranged, a closed door is arranged on the surface of the feed bin, a shunt pipe is arranged at the end of the feed bin close to the ground, a transmission mechanism is arranged on the frame and at the end away from the ground, and in the working state, is used to transport the material bags, a driving mechanism, the driving mechanism includes a first driving motor arranged inside the feed bin, the output end of the first driving motor is fixedly connected to a first small tooth, a negative pressure mechanism, the negative pressure mechanism includes The invention discloses a conveying tube body which is arranged in the feeding bin and above the first driving motor, one end of the conveying tube body passes through the feeding bin to its outer surface, the other end of the conveying tube body is in a circular ring shape, and a plurality of groups of air guide holes are provided inside the circular ring shape of the conveying tube body, a cylindrical baffle body is provided on the surface of the conveying tube body in contact with its circular ring shape, a coordination component is provided on the surface of the cylindrical baffle body with the axis of the cylindrical baffle body as the center, and is used to tighten the outer surface of the material bag in the working state, and a synchronization mechanism is provided on the inner bottom of the feeding bin coaxially with the cylindrical baffle body, and is used to expand the inner surface of the material bag outward.

[0006] As a preferred solution of a PTA automatic feeding device of the present invention, the transmission mechanism includes a frame arranged on a frame body, a second drive motor is fixedly connected to the surface of the frame, a coordination rod is fixedly connected to the output end of the second drive motor, a running block is arranged on the surface of the coordination rod, a carrier is arranged on the surface of the running block, a third drive motor is fixedly connected to the surface of the carrier, a roller is fixedly connected to the output end of the third drive motor, and a hook rope is arranged on the surface of the roller.

[0007] As a preferred solution of a PTA automatic feeding device of the present invention, the operating 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.

[0008] As a preferred solution of a PTA automatic feeding device of the present invention, the coordination component includes a directional block arranged on a cylindrical baffle body, the interior of the directional block is rotatably connected to an arc-shaped carrier, the interior of the arc-shaped carrier is provided with a ring-shaped elastic rope, and the end of the arc-shaped carrier close to the diversion pipe is provided with a trigger rod.

[0009] As a preferred solution of a PTA automatic feeding device of the present invention, the synchronization mechanism includes a first large tooth arranged at the bottom of the feeding bin, the surface of the first large tooth is centered on the cylindrical baffle body and is provided with a plurality of groups of arc grooves, each of the arc grooves is slidably connected to a connecting piece, the surface of the connecting piece is fixedly connected to a limiting plate, and the surface of the first large tooth is also provided with triangular touch plates corresponding to the number of trigger rods.

[0010] As a preferred solution of the PTA automatic feeding device of the present invention, the limit plate slides inside the cylindrical baffle.

[0011] 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.

[0012] 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.

[0013] 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; 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. 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. 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

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0015] Figure 1 The figure is a schematic diagram of an existing PTA automatic feeding device.

[0016] Figure 2 The figure is an overall schematic diagram of a PTA automatic feeding device.

[0017] Figure 3 The utility model relates to a transmission mechanism of a PTA automatic feeding device.

[0018] Figure 4 The invention discloses a driving mechanism structure of a PTA automatic feeding device.

[0019] Figure 5 The negative pressure mechanism of a PTA automatic feeding device is partially disassembled.

[0020] Figure 6 The utility model relates to the disassembly and partial closure of the coupling parts of a PTA automatic feeding device.

[0021] Figure 7 It is a schematic diagram of the negative pressure mechanism and synchronization mechanism of a PTA automatic feeding device.

[0022] In the figure: 100, frame; 101, feed bin; 102, closed door; 103, diverter pipe; 200, transmission mechanism; 201, frame; 202, second drive motor; 203, coordination rod; 204, running block; 205, carrier; 206, third drive motor; 207, hook rope; 300, driving mechanism; 301, first drive motor; 302, first small tooth; 400, negative pressure mechanism; 401, transmission tube; 402, air guide hole; 403, cylindrical block; 41, Coordinating assembly; 410, directional block; 411, arc-shaped carrier; 412, annular elastic rope; 413, trigger rod; 500, synchronization mechanism; 501, first large tooth; 502, arc notch; 503, connecting piece; 5031, limiting column; 5032, extension block; 5033, arc plate; 5034, clamping plate; 5035, arc notch; 504, limit plate; 505, triangular touch plate; 600, bag opening; 700, bag opening; 800, splint; 900, fixing seat. DETAILED DESCRIPTION

[0023] 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.

[0024] Example 1, reference Figure 2~Figure 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.

[0025] 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.

[0026] 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.

[0027] It should be noted that, at one end of the conveying pipe body 401 that penetrates into the silo 101 to its outer surface, a centrifugal fan, a vacuum pump, a compressor and other equipment that can actively generate negative pressure can be installed to provide negative pressure attraction. This installation is to allow the material bag to be placed in the gap between the cylindrical baffle 403 and the connecting piece 503. The several groups of air guide holes 402 of the conveying pipe body 401 can generate negative pressure and adsorb the outer surface of the material bag, thereby reducing the manpower opening time and improving efficiency. In actual use, an industrial blowing and suction fan can also be installed at this end of the conveying pipe body 401, so that not only can the opening on the outer surface of the material bag be adsorbed and opened, but also after the feeding is completed, the airflow can be sent into the interior of the conveying pipe body 401 by the industrial blowing and suction fan, and then the airflow is sent out through the air guide holes 402, and then the unsent PTA particles and dust in the feeding and unloading interval are blown away to achieve the cleaning effect.

[0028] Reference Figure 3 The transmission mechanism 200 includes a frame 201 arranged on the frame 100, and a second driving motor 202 is fixedly connected to the surface of the frame 201, and an output end of the second driving motor 202 is fixedly connected to a coordination rod 203, and a running block 204 is arranged on the surface of the coordination rod 203, and a carrier 205 is arranged on the surface of the running block 204, and a third driving motor 206 is fixedly connected to the surface of the carrier 205, and an 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.

[0029] During use, it is necessary to first use the second drive motor 202 to drive the coordination rod 203 to work. When the coordination rod 203 is working, it will drive the operating block 204 to move away from the second drive motor 202, and then the material bag will be hung up by the hook rope 207. Then the second drive motor 202 drives the coordination rod 203 to move in the opposite direction, so that its operating block 204 is close to the second drive motor 202. When the material bag is perpendicular to the inside of the feed bin 101, the third drive motor 206 starts to work and lowers the hook rope 207 to the cylindrical baffle 403 on the negative pressure mechanism 400.

[0030] The operating 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 .

[0031] The coordination component 41 includes a directional block 410 arranged on a cylindrical baffle 403 , wherein an arc-shaped carrier 411 is rotatably connected inside the directional 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 near the diversion pipe 103 .

[0032] During use, the directional block 410 is installed on the surface of the cylindrical baffle 403. When the trigger rod 413 is tilted close to the surface of the cylindrical baffle 403, the arc-shaped carrier 411 will be driven by the trigger rod 413 to expand outward away from the axis of the cylindrical baffle 403, and at the same time drive the annular elastic rope 412 to expand outward. When the trigger rod 413 is not under force, the annular elastic rope 412 will quickly pull the arc-shaped carrier 411 inward. At this time, the radius of the annular elastic rope 412 becomes shorter when the trigger rod 413 is not under force.

[0033] It should be noted that when the trigger rod 413 is not under force, the annular elastic rope 412 will be tightened toward the axis of the cylindrical baffle 403, and then fit into the arc groove 5035. At this time, the inside of the material bag fits on the connecting piece 503, while the outside will be fastened to the inside of the arc groove 5035 by the annular elastic rope 412, preventing the opening of the material bag from shaking due to the falling of PTA particles during feeding, causing the material to shake and the opening of the material bag to spill the PTA particles.

[0034] The synchronization mechanism 500 includes a first large tooth 501 arranged at the bottom of the feed bin 101. The surface of the first large tooth 501 is centered on the cylindrical blocking body 403 and is provided with a plurality of groups of arc grooves 502. Each of the arc grooves 502 is slidably connected to a connecting piece 503. The surface of the connecting piece 503 is fixedly connected to a limiting plate 504. The surface of the first large tooth 501 is also provided with triangular touch plates 505 corresponding to the number of trigger rods 413.

[0035] The limiting plate 504 slides inside the cylindrical blocking body 403 .

[0036] The connecting member 503 includes a limiting column 5031 which is slidably connected to the inside of the arc groove 502, the surface of the limiting column 5031 is provided with an extension block 5032, the surface of the extension block 5032 is fixedly connected with an arc plate 5033, the surface of the arc plate 5033 is provided with a clamping plate 5034, the surface of the clamping plate 5034 is provided with an arc groove 5035 for the annular elastic rope 412 to fit, and a sensor is provided inside the clamping plate 5034.

[0037] During use, the directional block 410 is installed on the surface of the cylindrical baffle 403. When the trigger rod 413 is tilted close to the surface of the cylindrical baffle 403, the arc-shaped carrier 411 will be driven by the trigger rod 413 to expand outward away from the axis of the cylindrical baffle 403, and at the same time drive the annular elastic rope 412 to expand outward. When the trigger rod 413 is not under force, the annular elastic rope 412 will quickly pull the arc-shaped carrier 411 inward. At this time, the radius of the annular elastic rope 412 becomes shorter when the trigger rod 413 is not under force.

[0038] It should be noted that when the trigger rod 413 is not under force, the annular elastic rope 412 will be tightened toward the axis of the cylindrical baffle 403, and then fit into the arc groove 5035. At this time, the inside of the material bag fits on the connecting piece 503, and the outside will be fastened to the inside of the arc groove 5035 by the annular elastic rope 412 to prevent the opening of the material bag from shaking due to the falling of PTA particles during feeding, resulting in material shaking and causing the material bag opening to shake and scatter the PTA particles. A sensor is provided inside the card plate 5034. When the card plate 5034 expands outward, the sensor detects the force applied to the card plate 5034 in real time. The set force is less than the pressure value of the bag mouth tearing. When the card plate 5034 is subjected to the maximum force, the sensor transmits data to the first drive motor 301. At this time, the first drive motor 301 stops working to avoid excessive force causing the bag body to be torn and damaged, causing the material to scatter.

[0039] The first small tooth 302 and the first large tooth 501 are located on the same horizontal line, and the first large tooth 501 is meshed with the first small tooth 302 .

[0040] First working principle: First, the personnel hangs the delivery bag on the hook rope 207, and then the second drive motor 202 drives the coordination rod 203 to move the operating block 204 toward the frame 100. When the delivery bag moves to the appropriate position, the third drive motor 206 is controlled to move the hook rope 207, and then the delivered material bag falls, and the conveying tube 401 starts to work, adsorbs the opening of the material bag, so that the material bag opens, and then the first drive motor 301 drives the first small tooth 302 to start working, and the first small tooth 302 drives the first large tooth 501 to rotate counterclockwise, and the connecting piece 503 starts to approach synchronously, and the limiting column 5031 inside the arc groove 502 starts to approach the coaxial center until it is formed to the maximum, that is, the two ends of each arc plate body 5033 fit together to form a relatively closed space, and then the negative pressure mechanism 400 disengages from the triangular touch plate 505, and the trigger rod 413 does not contact the triangular touch plate 505. When the bag is in contact with the bag, the annular elastic rope 412 inside the arc-shaped carrier 411 is tightened inwardly and fits into the arc-shaped groove 5035, clamping the bag so that the bag and the lower throwing space are relatively closed. When the connecting piece 503 is working, the limit plate 504 on the connecting piece 503 will slide inside the cylindrical blocking body 403 and limit the connecting piece 503. When the feeding bag is clamped, the staff unties the rope on the feeding bag, so that the material PTA in the bag begins to be thrown into the feeding bin 101. When it is thrown 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 tooth 302 in the opposite direction to make the first large tooth 501 start to work, and each clamping plate 5034 begins to move away from each other and expand outward, and the shrunk bag mouth is opened for a second time, and at the same time, the wrinkles and gaps inside the bag are straightened, and then the remaining material is thrown downward until the throwing is completed; Second working principle: That is, when only part of the large material bag needs to be put in and the feeding bag is small, the above work is repeated, but the difference is that at this time, the clamping plates 5034 move away from each other, and then move closer to each other until both ends of all the arc plates 5033 fit together, that is, when the material needs to complete the feeding index, the clamping plates 5034 move closer to each other, which will shorten the material feeding diameter and the feeding speed. When the clamping plates 5034 fit together, the opening of the feeding bag close to the ground is tied tightly with a rope, and then the feeding bag is sent back to a distant place through the transmission mechanism 200, and then the bag is closed. The sealed door 102 uses the transmission tube 401 to send the air flow into the air guide hole 402, and the air is sent out from the air guide hole 402 toward the upper side to blow the inside of the chamber of the hopper 101 to complete the cleaning. From then on, all the operation steps are completed. Under special conditions, such as when the material PTA is packaged, there may be a layer of plastic film inside the bag to protect the material PTA. At this time, personnel are required to cut the plastic film inside the bag mouth after the bag mouth is opened, that is, (cut the plastic film from the gap opened by each opened card board 5034).

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A PTA automatic feeding device, characterized in that: include; A frame (100), wherein a feed bin (101) is vertically arranged on the surface of the frame (100) with the ground as the center of gravity, a sealed door (102) is arranged on the surface of the feed bin (101), and a shunt pipe (103) is arranged at the end of the feed bin (101) close to the ground; The transmission mechanism (200) is arranged on the frame (100) at an end away from the ground surface, and is used to transmit and transport the material bags in a working state; A driving mechanism (300), the driving mechanism (300) comprising a first driving motor (301) arranged inside the feeding bin (101), the output end of the first driving motor (301) being fixedly connected to a first small tooth (302); A negative pressure mechanism (400), the negative pressure mechanism (400) comprising a conveying tube (401) arranged in the feeding bin (101) above the first driving motor (301), one end of the conveying tube (401) passing through the feeding bin (101) to its outer surface, the other end of the conveying tube (401) being in a circular ring shape, and a plurality of groups of air guide holes (402) being provided inside the circular ring shape of the conveying tube (401), and a cylindrical baffle (403) being provided on the surface of the conveying tube (401) in close contact with its circular ring shape; The coordination component (41) is arranged on the surface of the cylindrical blocking body (403) with the axis of the cylindrical blocking body (403) as the center, and is used to tighten the outer surface of the material bag in the working state; The synchronization mechanism (500) is coaxially arranged with the cylindrical blocking body (403) at the inner bottom of the material feeding bin (101) and is used to expand the inner surface of the material bag outward.

2. A PTA automatic feeding device as claimed in claim 1, characterized in that: The transmission mechanism (200) comprises a frame (201) arranged on a frame body (100); a second drive motor (202) is fixedly connected to the surface of the frame (201); an output end of the second drive 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 carrier (205) is arranged on the surface of the running block (204); a third drive motor (206) is fixedly connected to the surface of the carrier (205); an output end of the third drive motor (206) is fixedly connected to a roller; and a hook rope (207) is arranged on the surface of the roller.

3. A PTA automatic feeding device as claimed in claim 2, characterized in that: The operating 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. A PTA automatic feeding device as claimed in claim 3, characterized in that: The coordination component (41) comprises a directional block (410) arranged on a cylindrical blocking body (403), the interior of the directional block (410) being rotatably connected to an arc-shaped carrier (411), the interior of the arc-shaped carrier (411) being provided with an annular elastic rope (412), and the end of the arc-shaped carrier (411) close to the diversion pipe (103) being provided with a trigger rod (413).

5. A PTA automatic feeding device as claimed in claim 4, characterized in that: The synchronization mechanism (500) comprises a first large tooth (501) arranged at the bottom of the feed bin (101); the surface of the first large tooth (501) is provided with a plurality of groups of arc grooves (502) with the cylindrical blocking body (403) as the axis; the interior of each arc groove (502) is slidably connected with a connecting piece (503); the surface of the connecting piece (503) is fixedly connected with a limiting plate (504); and the surface of the first large tooth (501) is also provided with triangular touch plates (505) corresponding to the number of the trigger rods (413).

6. A PTA automatic feeding device as claimed in claim 5, characterized in that: The limiting plate (504) slides inside the cylindrical blocking body (403).

7. A PTA automatic feeding device as claimed in claim 6, characterized in that: The connecting member (503) comprises a limiting column (5031) slidably connected to the inside of the arc groove (502); an extension block (5032) is arranged on the surface of the limiting column (5031); an arc plate (5033) is fixedly connected to the surface of the extension block (5032); a clamping plate (5034) is arranged on the surface of the arc plate (5033); a surface of the clamping plate (5034) is provided with an arc groove (5035) for the annular elastic rope (412) to fit; and a sensor is arranged inside the clamping plate (5034).

8. A PTA automatic feeding device as claimed in claim 7, characterized in that: The first small tooth (302) and the first large tooth (501) are located on the same horizontal line, and the first large tooth (501) is meshed with the first small tooth (302).

9. A PTA automatic feeding device as claimed in claim 7, characterized in that: One end of the conveying pipe body (401) penetrates into the material bin (101) to its outer surface.

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