A spill-proof packaging device for carbon black production

Abstract

The present invention relates to the technical field of carbon black packaging, and more specifically, to an anti-overflow packaging device for carbon black production. The device comprises a packaging frame, a protective door, and a supporting plate for supporting packaging bags. A feeding pipe is provided on the packaging frame above the supporting plate, one end of which is connected to a storage tank, and a material blocking plate capable of holding the bag opening is fixedly provided on the feeding pipe at the bag opening of the packaging bag. The carbon black is used to apply pressure to the power box, and in conjunction with the use of a compression spring, the pressure block is moved back and forth in the longitudinal direction. The pressure block disturbs the flow of carbon black in the feeding pipe, thereby changing the local flow velocity and pressure distribution of the carbon black in the feeding pipe, reducing adhesion in the feeding pipe, and thus reducing blockage. At the same time, the downwardly moving pressure block applies pressure to the carbon black at the bottom that is about to rise to the bag opening, forming a pit on the carbon black, thereby preventing the carbon black in the packaging bag from being brought out by the feeding pipe and affecting the uniformity of the carbon black.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon black packaging, in particular to an anti-overflow type packaging device for carbon black production. Background Art

[0002] Carbon black is mainly formed by pyrolysis of methane gas after high-temperature heating. The finished carbon black product is in powder form. Currently, carbon black is usually packaged in packaging bags. Since the finished carbon black product is in powder form, a large amount of dust will be generated during the packaging process.

[0003] At present, in order to reduce the carbon black dust overflowing from between the discharge pipe and the packaging bag, the existing packaging equipment usually puts the bag mouth of the packaging bag on the outside of the discharge pipe of the storage tank, and then uses a pressing piece arranged on the outside of the discharge pipe to press the bag mouth of the packaging bag against the outer wall of the discharge pipe. Chinese Patent Publication No.: CN118701347A proposes a carbon black powder packaging machine, which belongs to the technical field of equipment for packaging and guiding materials, including: a discharge pipe, a telescopic tube is coaxially passed through the interior of the telescopic tube, and a frustum is coaxially provided on the outside of the lower end of the telescopic tube; the outer wall of the frustum is provided with a slide groove along the busbar direction, and at least three slide grooves are provided in a circular array along the circumference of the frustum. Each chute is equipped with an inner support plate that slides inside. The outer surface of the inner support plate matches the conical surface of the truncated cone. A connecting rod is installed at the upper end of the inner support plate. The upper end of the connecting rod extends to the outside of the discharge pipe. The outer side of the discharge pipe is equipped with a guide rod that intersects perpendicularly with the axis. The guide rods correspond to the connecting rods one by one, and the guide rods pass through the corresponding connecting rods. The connecting rods slide on the corresponding guide rods. A pressure plate is installed on the outer side of each inner support plate. The top of its lower end cooperates with the outer wall of the lower end of the inner support plate to press the bag opening.

[0004] Because the bag opening of the packaging bag needs to be larger than the diameter of the catheter in order to be put on the catheter, this will cause the bag opening to not be completely fitted with the discharge pipe. Even if the bag opening of the packaging bag is pressed tightly by a pressing device, there will be wrinkles on the edge of the bag opening. Moreover, during the carbon black packaging process, as the weight of the carbon black in the packaging bag gradually increases, the wrinkled bag opening is stretched, forming a "V"-shaped channel between it and the catheter, that is, the bag opening is stretched. If the carbon black drawn into the packaging bag contacts the bottom of the catheter, the packaging bag will detach from the catheter. Due to friction generated by the contact between the catheter and the carbon black in the packaging bag, the carbon black in the bag will be brought out of the "V"-shaped channel, resulting in insufficient carbon black in the packaging bag, affecting the uniformity of the product. Summary of the Invention

[0005] The present invention provides an anti-overflow packaging device for carbon black production, which utilizes a downwardly moving pressure block to apply pressure to the carbon black at the bottom that is about to rise to the bag opening, thereby forming a pit on the carbon black, thereby preventing the carbon black in the packaging bag from being carried out by the feeding pipe and affecting the uniformity of the carbon black, thereby solving the problems raised in the above-mentioned background technology, namely:

[0006] To achieve the above objectives, the overflow-proof carbon black production packaging equipment includes a packaging frame, a protective door, and a carrier plate for supporting packaging bags. A feed pipe is provided on the packaging frame above the carrier plate, and one end of the feed pipe is connected to the storage tank;

[0007] A material blocking plate capable of supporting the bag opening is fixedly provided on the feeding tube at the bag opening of the packaging bag, and the outer diameter of the material blocking plate is larger than the inner diameter of the bag opening. A flexible air cushion is provided on the feeding tube located in the bag opening and in contact with the material blocking plate. The flexible air cushion is connected to an indentation forming part movably provided in the feeding tube. When packaging carbon black, the carbon black flowing in the feeding tube is used to apply pressure to the indentation forming part. The indentation forming part is used to form a pit on the carbon black in the packaging bag away from the bottom of the feeding tube, and to press the air into the flexible air cushion so that the flexible air cushion fills the bag opening to achieve restriction of the carbon black in the packaging bag.

[0008] The indentation forming part includes a pressure block movably arranged with the feeding pipe, and a power box located in the feeding pipe and fixedly arranged with the pressure block, wherein the power box is located on the side of the feeding port of the feeding pipe and is in an inclined shape;

[0009] On the other hand, baffles are fixedly provided at both ends of the pressure block, and the baffles are movably provided in a compartment located in the feed pipe. The compartment is located at the end of the pressure block, and a compression spring is elastically connected between the baffle and the inner wall of the compartment.

[0010] In the above technical solution, the carbon black powder transported in the feed pipe applies pressure to the inclined surface of the power box. Based on the decomposition of the force, it can be seen that the power box drives the pressure block to move synchronously downward. In this process, the elastic potential energy of the compression spring is overcome. The compression spring is compressed, and the elastic potential energy increases. When the vertical downward component of the force applied by the carbon black on the power box is weakened, the baffle is pushed upward in the opposite direction under the elastic action of the compression spring. The upward movement of the power box disturbs the carbon black transported in the feed pipe, thereby reducing the adhesion of the carbon black to the inner wall of the feed pipe.

[0011] When the flexible air cushion is inflated, the material resistance plate is used to hold the outside of the expanded flexible air cushion, so that the flexible air cushion expands into the bag opening. The flexible air cushion fills the gap between the bag opening and the feed pipe, thereby reducing air leakage, making the negative pressure device more effective in attracting carbon black and improving the suction effect of carbon black.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Use carbon black to apply pressure to the power box, and cooperate with the use of compression spring to make the pressure block move back and forth in the longitudinal direction. The pressure block disturbs the flow of carbon black in the feed pipe, thereby changing the local flow velocity and pressure distribution of carbon black in the feed pipe, reducing adhesion in the feed pipe, and thus reducing blockage. At the same time, the downward moving pressure block applies pressure to the carbon black at the bottom that is about to rise to the bag mouth, forming a pit on the carbon black, preventing the carbon black in the packaging bag from being brought out by the feed pipe, affecting the uniformity of the carbon black.

[0014] 2. The reciprocating motion of the pressure block is used to force the flexible air cushion to increase its pressure and expand. The expanded flexible air cushion fills the gap between the bag opening and the feeding pipe, hindering the carbon black and thus limiting the overflow of the carbon black in the bag.

[0015] 3. When the flexible air cushion is inflated, the material resistance plate is used to hold the outside of the expanded flexible air cushion, so that the flexible air cushion expands into the bag opening. The flexible air cushion fills the gap between the bag opening and the feeding pipe, thereby reducing air leakage, making the negative pressure device more effective in attracting carbon black and improving the suction effect of carbon black. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0017] Figure 2 This is a left view of the feed pipe structure of the present invention;

[0018] Figure 3 This is a three-dimensional diagram of the feed pipe, material blocking plate, and flexible air cushion structure of the present invention;

[0019] Figure 4 This is a right side view of the internal structure of the feed pipe of the present invention with a partial cutaway view;

[0020] Figure 5 This is a rear view of the principle structure of the flexible air cushion filling the gap at the bag opening of the present invention;

[0021] Figure 6 This is a right view of the principle structure of the pit formation of the present invention;

[0022] Figure 7 This is a three-dimensional diagram of the cross-section of the feed pipe and the explosion structure of the pressure block of the present invention;

[0023] Figure 8 For the present invention Figure 4 A in the figure shows the enlarged structural diagram;

[0024] Figure 9 This is a schematic diagram of the internal structure of the feed pipe of the present invention in a partial cutaway manner;

[0025] Figure 10Schematic diagram of the connection structure between the gas collecting cavity, the flexible air cushion and the air release channel of the present invention

[0026] Figure 11 For the present invention Figure 9 The enlarged structural diagram at B in FIG.

[0027] The meaning of each number in the figure is:

[0028] 100. Packaging rack; 101. Protective door; 102. Loading plate;

[0029] 110, feed pipe; 110a, through groove; 111, material blocking plate; 112, compartment; 113, air supply channel; 114, air delivery channel; 115, one-way valve; 116, air release channel; 117, air collecting chamber; 118, air inlet channel;

[0030] 120. Flexible air cushion;

[0031] 130, indentation forming portion; 131, pressure block; 131a, baffle; 132, power box; 133, telescopic air cushion; 134, compression spring;

[0032] 140, pit;

[0033] 150. Ring; 151. Stopper; 152. Tension spring. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] When the carbon black drawn into the packaging bag contacts the bottom of the conduit, the packaging bag is separated from the conduit. Due to the friction between the conduit and the carbon black in the packaging bag, the carbon black in the bag is brought out from the "V"-shaped channel, resulting in insufficient carbon black in the packaging bag and affecting the uniformity of the product. The present invention provides an anti-overflow carbon black production packaging equipment, see Figure 1-Figure 3 As shown, the packaging machine comprises a packaging frame 100, a protective door 101 and a supporting plate 102 for supporting packaging bags, wherein a feeding pipe 110 is provided on the packaging frame 100 above the supporting plate 102, one end of the feeding pipe 110 is connected to a storage tank (not shown in the figure), when the carbon black powder (hereinafter referred to as carbon black) in the storage tank is packaged, the packaging bag (the packaging bag is referred to as Figure 2The bag opening (the dotted line portion in the figure) is placed on the feeding pipe 110, and the bottom of the packaging bag is located on the supporting plate 102, so as to provide support for the packaging bag as the weight of the carbon black in the packaging bag increases. Then, the protective doors 101 on both sides are closed to wrap the packaging bag, and the negative pressure device provided inside the protective doors 101 is activated. The negative pressure is used to draw the carbon black in the storage tank into the packaging bag through the feeding pipe 110, thereby completing the packaging of the carbon black.

[0036] In order to improve the overall sealing of the equipment, a rubber sheet is provided around the outer ring of the protective door 101, so that when the protective doors 101 on both sides match each other, the sealing and packaging efficiency during the packaging process can be improved.

[0037] Secondly, in view of the above problems, Figure 4 、 Figure 5 、 Figure 6 As shown, a material blocking plate 111 capable of supporting the bag opening is fixedly provided on the feeding tube 110 at the bag opening of the packaging bag, and the outer diameter of the material blocking plate 111 is larger than the inner diameter of the bag opening. A flexible air cushion 120 is provided on the feeding tube 110 located in the bag opening and in contact with the material blocking plate 111. The flexible air cushion 120 is communicated with an indentation forming part 130 movably provided in the feeding tube 110. When packaging carbon black, the carbon black flowing in the feeding tube 110 is used to apply pressure to the indentation forming part 130. The indentation forming part 130 is used to form a pit 140 on the carbon black in the packaging bag away from the bottom of the feeding tube 110, and press air into the flexible air cushion 120 so that the flexible air cushion 120 fills the bag opening, thereby limiting the carbon black in the packaging bag and preventing the carbon black from overflowing.

[0038] First, the specific structure of the indentation forming part 130 is shown. The indentation forming part 130 includes a pressure block 131 movably arranged with the feeding pipe 110, and a power box 132 located in the feeding pipe 110 and fixedly arranged with the pressure block 131. The power box 132 is located on the side of the feeding port of the feeding pipe 110 and is in the shape of an inclined plane. When negative pressure is generated at one end of the discharge port of the feeding pipe 110, the carbon black in the storage tank is transported into the packaging bag through the feeding pipe 110. In this process, since the carbon black transported in the feeding pipe 110 is not uniform, the carbon black flowing in the feeding pipe 110 is used to collide with the power box 132, so that the power box 132 pushes the pressure block 131 to move downward longitudinally;

[0039] Secondly, combined with Figure 7As shown, the pressure block 131 is located in the through groove 110a opened at the bottom of the feeding tube 110. Under normal conditions, the bottom of the pressure block 131 is consistent with the outer contour of the feeding tube 110. When the pressure block 131 moves downward, the pressure block 131 is used to change the effective flow area of ​​the carbon black in the feeding tube 110 and form abutment against the carbon black accumulated below to limit the carbon black from overflowing from the bag mouth. On the other hand, baffles 131a are fixedly provided at both ends of the pressure block 131. The baffle 131a is movably provided in a compartment 112 provided in the feeding tube 110. The compartment 112 is located at the end of the pressure block 131. A compression spring 134 is elastically connected between the baffle 131a and the inner wall of the compartment 112.

[0040] During specific operation, the carbon black powder transported in the feeding pipe 110 applies pressure to the inclined surface of the power box 132 (arrow h is the flow direction of the carbon black). Based on the decomposition of the force, it can be seen that the power box 132 drives the pressure block 131 downward (arrow g is the movement direction of the pressure block 131) to move synchronously. In this process, the elastic potential energy of the compression spring 134 is overcome. The compression spring 134 is compressed and the elastic potential energy increases. When the vertical downward component of the force applied by the carbon black on the power box 132 is weakened, the baffle 131a is pushed upward in the opposite direction under the elastic action of the compression spring 134. The upward movement of the power box 132 disturbs the carbon black transported in the feeding pipe 110, thereby reducing the adhesion of the carbon black to the inner wall of the feeding pipe 110.

[0041] Furthermore, considering that the amount of carbon black gradually increases in the packaging bag, a retractable air cushion 133 is provided in the compartment 112 away from the discharge port of the feeding pipe 110. The top of the retractable air cushion 133 is bonded to the baffle 131a, and the bottom is bonded to the inner wall of the compartment 112. At the same time, an air supply channel 113 is connected between the bottom of the retractable air cushion 133 and the flexible air cushion 120, and an air delivery channel 114 is connected between the retractable air cushion 133 and the external air. A one-way valve 115 is provided in both the air supply channel 113 and the air delivery channel 114. The one-way valve 115 in the passage 113 is used to supply air in the telescopic air cushion 133 to the flexible air cushion 120, causing the flexible air cushion 120 to expand. The expanded flexible air cushion 120 fills the gap between the bag opening and the feeding pipe 110, thereby hindering the carbon black and limiting the overflow of the carbon black in the bag. Secondly, the one-way valve 115 in the air supply passage 114 is used to supply external air to the telescopic air cushion 133, so that the external air can be drawn into the telescopic air cushion 133 during the reciprocating movement of the baffle 131a.

[0042] That is, the carbon black is used to apply pressure to the power box 132, and in conjunction with the use of the compression spring 134, the pressure block 131 is moved back and forth in the longitudinal direction. The pressure block 131 disturbs the flow of carbon black in the feeding pipe 110, thereby changing the local flow velocity and pressure distribution of the carbon black in the feeding pipe 110, reducing the adhesion in the feeding pipe 110, and thus reducing the blockage phenomenon. At the same time, the downward moving pressure block 131 applies pressure to the carbon black at the bottom that is about to rise to the bag opening, so that a pit 140 is formed on the carbon black, thereby preventing the carbon black in the packaging bag from being brought out by the feeding pipe 110 and affecting the uniformity of the carbon black.

[0043] Return to Figure 5 and Figure 6 As shown, when the flexible air cushion 120 is inflated, the material-blocking plate 111 is used to hold the outside of the inflated flexible air cushion 120, so that the flexible air cushion 120 expands into the bag opening. The flexible air cushion 120 fills the gap between the bag opening and the feeding tube 110, thereby reducing air leakage, making the negative pressure device more effective in attracting carbon black and improving the suction effect on carbon black.

[0044] In addition, combined Figure 9 、 Figure 10 、 Figure 11 As shown, a ring 150 is movably provided on the inner wall of the discharge port of the feed pipe 110 for pushing the carbon black attached to the inner wall of the feed pipe 110. The ring 150 is located in the air collecting cavity 117 in the feed pipe 110. An air inlet channel 118 is connected between the air collecting cavity 117 and the flexible air cushion 120. An air discharge channel 116 is connected to the air collecting cavity 117 and the external air. The inner diameter of the air discharge channel 116 is smaller than the air inlet channel 118. In this way, the carbon black is transported to the flexible air cushion 120. The air is transported to the air collecting chamber 117 through the air inlet channel 118, forcing the pressure in the air collecting chamber 117 and the flexible air cushion 120 to increase. While the flexible air cushion 120 is expanded, the air is used to push the ring 150 to move toward the discharge port of the feed pipe 110. The ring 150 cleans the carbon black accumulated at the discharge port of the feed pipe 110, and pushes the carbon black outward and separates it from the inner wall of the feed pipe 110, so as to reduce the adhesion of carbon black and facilitate the later transportation of carbon black.

[0045] Next, a stopper 151 is fixedly provided at the end of the collar 150 located in the feeding tube 110. The stopper 151 can prevent the tension spring 152 from detaching from the feeding tube 110, and the tension spring 152 located in the air collecting chamber 117 is elastically connected between the stopper 151 and the feeding tube 110. In this way, the air delivered into the air collecting chamber 117 overcomes the elastic potential energy of the tension spring 152 to push the collar 150 to move. When the collar 150 moves to be flush with the end of the discharge port of the feeding tube 110, the flexible air cushion 120 expands to the point where the telescopic air cushion 133 can no longer deliver air to the flexible air cushion 120 (refer to FIG. 1 ). Figure 8 As shown), that is, the pressure exerted by the carbon black on the power box 132 can no longer push the pressure block 131 to move downward. At this time, the ring 150 maintains a stable state. Once the pressure in the air collecting chamber 117 is reduced to a certain level, the flexible air cushion 120 will again supply air to the air collecting chamber 117. At the same time, the downward pressure block 131 will exert pressure on the carbon black in the packaging bag, so that a pit 140 is formed on the carbon black.

[0046] When the suction of carbon black is stopped, the height of the carbon black accumulation at the discharge port of the feed pipe 110 is as follows: Figure 9 As shown in the dotted line, the height of carbon black is H1, and due to the characteristics of carbon black itself, the carbon black near the discharge port comes into contact with the outside air and water vapor, and is easily attached to the inner wall of the discharge port, which is easy to cause blockage; as the air in the collecting chamber 117 is slowly discharged from the air discharge channel 116, and the ring 150 is pulled back to its original position under the elastic action of the tension spring 152, the carbon black accumulated on the ring 150 is supported by the inner wall of the feed pipe 110, so that the carbon black on the ring 150 falls into a part of the packaging bag, reducing the adhesion of carbon black, and the height of carbon black on the ring 150 is reduced to H2 to avoid the carbon black accumulated at the discharge port of the feed pipe 110 being too high, and the carbon black overflowing due to vibration when the packaging bag is removed.

[0047] Since a small amount of carbon black will remain on the pressure block 131 after the suction stops, the pressure block 131 will sink a little. However, under the elastic action of the compression spring 134, the pressure block 131 will not sink too much, preventing the pressure block 131 from contacting the carbon black, and at the same time facilitating the pressure block 131 to pass smoothly through the bag opening.

[0048] Working principle: The packaging bag is covered by the protective door 101, and the carbon black is sucked out by the negative pressure device. During the suction process, the carbon black applies pressure to the power box 132, and the elastic potential energy of the compression spring 134 is combined to make the pressure block 131 move back and forth in the longitudinal direction. The pressure block 131 disturbs the flow of carbon black in the feeding pipe 110, changing the local flow velocity and pressure distribution of the carbon black in the feeding pipe 110, thereby reducing adhesion in the feeding pipe 110 and reducing clogging.

[0049] In addition, the downward moving pressure block 131 applies pressure to the carbon black at the bottom that is about to rise to the bag opening, so that a pit 140 is formed on the carbon black, which prevents the carbon black in the packaging bag from being brought out by the feeding pipe 110 and affecting the uniformity of the carbon black. The flexible air cushion 120 is inflated and expanded. At the same time, air is also transported into the air collecting chamber 117 to push the ring 150 to move toward the discharge port. The expanded flexible air cushion 120 fills the gap between the bag opening and the feeding pipe 110, which hinders the carbon black and limits the overflow of the carbon black in the packaging bag. The movement of the ring 150 toward the discharge port pushes the carbon black that was last attached to the inner wall of the discharge port, so that the carbon black is detached from the inner wall of the discharge port, reducing the blockage phenomenon.

[0050] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-overflow packaging device for carbon black production, comprising a packaging frame (100), a protective door (101), and a supporting plate (102) for supporting packaging bags, characterized in that: A feeding pipe (110) is provided on the packaging machine frame (100) above the carrying plate (102), and one end of the feeding pipe (110) is connected to the material storage tank; A material blocking plate (111) capable of supporting the bag opening is fixedly provided on the feeding tube (110) at the bag opening of the packaging bag, wherein the outer diameter of the material blocking plate (111) is larger than the inner diameter of the bag opening, and a flexible air cushion (120) is provided on the feeding tube (110) located in the bag opening and in contact with the material blocking plate (111), wherein the flexible air cushion (120) is communicated with an indentation forming part (130) movably provided in the feeding tube (110), and when packaging carbon black, the carbon black flowing in the feeding tube (110) is used to apply pressure to the indentation forming part (130), and the indentation forming part (130) is used to form a pit (140) on the carbon black in the packaging bag away from the bottom of the feeding tube (110), and to press air into the flexible air cushion (120), so that the flexible air cushion (120) fills the bag opening, thereby achieving restriction of the carbon black in the packaging bag; The indentation forming portion (130) comprises a pressure block (131) movably arranged with the feed tube (110), and a power box (132) located in the feed tube (110) and fixedly arranged with the pressure block (131); Baffles (131a) are fixedly provided at both ends of the pressure block (131), and the baffles (131a) are movably provided in a compartment (112) located in the feed pipe (110). The compartment (112) is located at the end of the pressure block (131), and a compression spring (134) is elastically connected between the baffle (131a) and the inner wall of the compartment (112); A telescopic air cushion (133) is provided in a compartment (112) away from a discharge port of the feed pipe (110), wherein the top of the telescopic air cushion (133) is bonded to the baffle (131a), and the bottom is bonded to the inner wall of the compartment (112); An air supply channel (113) is connected between the bottom of the telescopic air cushion (133) and the flexible air cushion (120), and an air delivery channel (114) is connected between the telescopic air cushion (133) and the external air.

2. The anti-overflow carbon black production packaging equipment according to claim 1, characterized in that: The power box (132) is located on a side of the feed inlet of the feed pipe (110) and is in the shape of an inclined surface.

3. The anti-overflow carbon black production packaging equipment according to claim 2, characterized in that: The pressure block (131) is located in a through groove (110a) opened at the bottom of the feeding tube (110). Under normal conditions, the bottom of the pressure block (131) matches the outer contour of the feeding tube (110). When the pressure block (131) moves downward, the pressure block (131) is used to change the effective flow area of ​​the carbon black in the feeding tube (110) and form abutment against the carbon black accumulated below to limit the carbon black from overflowing from the bag mouth.

4. The anti-overflow carbon black production packaging equipment according to claim 1, characterized in that: One-way valves (115) are provided in both the air supply channel (113) and the air delivery channel (114). The one-way valve (115) in the air supply channel (113) is used to supply air in the telescopic air cushion (133) to the flexible air cushion (120), thereby expanding the flexible air cushion (120). The one-way valve (115) in the air delivery channel (114) is used to supply external air to the telescopic air cushion (133).

5. The anti-overflow carbon black production packaging equipment according to claim 1, characterized in that: When the flexible air cushion (120) is inflated, the material-blocking plate (111) is used to hold the outside of the inflated flexible air cushion (120) against the outside, so that the flexible air cushion (120) expands into the bag opening, and the flexible air cushion (120) fills the gap between the bag opening and the feeding tube (110).

6. The anti-overflow carbon black production packaging equipment according to claim 1, characterized in that: A collar (150) is movably provided on the inner wall of the discharge port of the feed pipe (110) for pushing the carbon black attached to the inner wall of the feed pipe (110). The collar (150) is located in an air collecting cavity (117) in the feed pipe (110). An air inlet channel (118) is connected between the air collecting cavity (117) and the flexible air cushion (120). An air discharge channel (116) is connected between the air collecting cavity (117) and the external air. The inner diameter of the air discharge channel (116) is smaller than that of the air inlet channel (118).

7. The anti-overflow carbon black production packaging equipment according to claim 6, characterized in that: A stopper (151) is fixedly provided at the end of the collar (150) located in the feed pipe (110), and the stopper (151) can limit the tension spring (152) from detaching from the feed pipe (110), and a tension spring (152) located in the gas collecting chamber (117) is elastically connected between the stopper (151) and the feed pipe (110).

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