Intelligent packaging and sealing device and packaging and sealing structure for caustic soda flakes

Abstract

The utility model relates to the technical field of caustic soda product packaging, and discloses an intelligent packaging and sealing device and packaging and sealing structure for caustic soda flakes, and the sealing structure is in a net shape which is circularly and crossly distributed and is provided with at least two sealing points in any vertical direction; the device comprises a conveying belt and a heat sealing unit located above the conveying belt, the heat sealing unit comprises heat sealing wheels, the heat sealing wheels comprise the forward heat sealing wheel and the reverse heat sealing wheel which are sequentially distributed in the length direction of the conveying belt, and a plurality of heat sealing strips which are obliquely distributed are arranged on the circumferential faces of the heat sealing wheels; the inclination directions of heat sealing strips on the forward heat sealing wheel and the reverse heat sealing wheel are opposite, and the heat sealing wheels can be subjected to heat sealing under the action of the rotary driving mechanism and the heating mechanism to form a net-shaped sealing structure which is distributed in a circulating and crossed mode and provided with at least two sealing points in any vertical direction. By means of the packaging sealing structure, the problems that an existing packaging sealing structure is prone to leakage, and sealing is not coherent and incomplete due to the fact that a heat sealing strip of a long-strip-shaped structure is adopted for sealing can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of alkali product packaging, in particular to an intelligent packaging sealing device and a packaging sealing structure for alkali flakes. Background Art

[0002] Caustic soda flakes mainly refer to alkali products such as sodium hydroxide or potassium hydroxide in flake form. Traditionally, caustic soda flakes are packaged manually, but since caustic soda flakes are highly corrosive, the alkali dust produced during the packaging process can easily corrode the operator and further damage the operator's health. Based on this, intelligent packaging equipment for caustic soda flakes has been developed to replace the traditional manual intelligent packaging operation of caustic soda flakes.

[0003] The intelligent packaging equipment includes automatic bag taking and bagging devices for packaging bags, automatic loading and weighing devices for caustic soda flakes, and intelligent packaging and sealing devices for packaging bags. Through the intelligent operation of each device, the fully automatic packaging and processing of caustic soda flakes is realized. Among them, the existing intelligent packaging and sealing device includes a conveyor belt and a heat sealing unit. When the conveyor belt is working, the packaging bag containing caustic soda flakes is consigned to the heat sealing unit. The heat sealing strips in the heat sealing unit squeeze and heat seal the two sides of the bag opening of the packaging bag toward the middle of the bag opening, thereby heat-sealing and sealing the bag opening. However, since the heat sealing strip in the existing heat sealing unit is in a long strip structure, the seal formed by the heat sealing unit on the packaging bag is also in a straight line shape. The seal of this straight line structure is very likely to be discontinuous and incomplete, resulting in sealing gaps. However, since the volume and diameter of the caustic soda flakes are small, once the seal is discontinuous and incomplete, on the one hand, it is very easy for the caustic soda flakes to escape, causing product loss; on the other hand, the vacuum environment inside the packaging bag cannot be guaranteed, which will make the caustic soda flakes very easy to get damp and clump, thereby damaging the quality of the product. The caustic soda flakes release heat after getting damp, which is also very easy to corrode the transportation equipment and handling personnel, causing damage to the transportation equipment and handling personnel.

[0004] Therefore, it is very necessary to improve the packaging sealing device and packaging sealing structure. Utility Model Content

[0005] The utility model aims to provide an intelligent packaging and sealing device for caustic soda flakes, so as to solve the problem that the existing packaging and sealing devices are prone to discontinuous and incomplete sealing due to the use of long strip-shaped heat-sealing strips for sealing.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an intelligent packaging and sealing device for caustic soda flakes, comprising a conveyor belt and a heat sealing unit, the heat sealing unit being located above the conveyor belt, the heat sealing unit comprising a heat sealing wheel, the heat sealing wheel comprising a forward heat sealing wheel and a reverse heat sealing wheel which are sequentially distributed along the length direction of the conveyor belt, a plurality of heat sealing strips which are sequentially arranged along the circumferential surface of the heat sealing wheel are provided on the circumferential surface of the heat sealing wheel, the heat sealing strips are all in the shape of inclined strips, and the inclination directions of the heat sealing strips on the forward heat sealing wheel and the reverse heat sealing wheel are opposite, the heat sealing wheels are connected with a heating mechanism and a rotating drive mechanism, and the heat sealing wheels can, under the action of the rotating drive mechanism and the heating mechanism, heat-seal on the packaging bag to form a mesh sealing structure which is cyclically cross-distributed and has at least two sealing points in any vertical direction.

[0007] The principle of this solution is: the heat sealing unit in this solution adopts a wheel structure with a heat sealing strip for heat sealing. When the forward heat sealing wheel and the reverse heat sealing wheel rotate and contact the packaging bag, they will leave positive and negative bidirectional inclined heat sealing tracks on the packaging bag. These tracks are staggered and superimposed to eventually construct a circular cross-distributed mesh sealing structure on the packaging bag. Compared with the traditional linear sealing structure, this shape of sealing structure provides a larger sealing area, thereby improving the strength and reliability of the seal and reducing the risk of leakage. At the same time, the use of this shape of sealing structure can form at least two sealing points in any vertical direction. In this way, even if one of the sealing points has a sealing defect, the other sealing points can continue to function, thereby forming a multiple sealing barrier. This design greatly improves the sealing effect of the packaging bag, can effectively prevent the sealing leakage of the packaging bag, and ensure the integrity of the packaging and the quality of the product.

[0008] The advantages of this solution are:

[0009] 1. Enhanced sealing performance: The cross-distributed mesh sealing structure significantly increases the sealing area. Compared with linear seals, it provides a wider range of contact points, thereby significantly improving the strength and reliability of the seal, effectively preventing leakage and ensuring packaging integrity.

[0010] 2. Multiple sealing barriers: The mesh structure forms multiple layers of cross-sealing points on the packaging bag. Even if a tiny sealing defect occurs at one point, the remaining sealing points can still function to form multiple sealing protections, greatly improving the stability, integrity and continuity of the seal, and ensuring the packaging quality of caustic soda flakes.

[0011] 3. Compact and simplified structure: The heat sealing wheel is used for rotary heat sealing. Compared with the traditional long heat sealing strip, the length of the heat sealing unit and the space occupied are significantly reduced, and the equipment structure is simplified.

[0012] 4. Avoid sticking and facilitate maintenance: In traditional heat sealing units, since the heat sealing strip is made of metal and its surface has a certain degree of roughness, the heat sealing strip is prone to sticking to the packaging bag when heat sealing the packaging bag. In order to avoid this situation, a heating tape with a smoother surface and thinner thickness is usually glued to the heat sealing strip during application, and the heating tape is used to separate the heat sealing strip from the packaging bag. However, when using the heat sealing unit with this structure, the heating tape often fails to adhere and falls off the heat sealing strip. At the same time, the long-term friction between the heating tape and the packaging bag also makes it very easy to fall off or break, so it needs to be replaced frequently. The heat sealing unit in the technical solution uses a heat sealing wheel for rotary heat sealing, which makes it easier to separate the heat sealing strip from the packaging bag and less likely to stick to it. Therefore, there is no need to use a heating tape for heat sealing, which not only ensures the heat sealing quality of the packaging bag, but also avoids sticking between the heat sealing strip and the packaging bag, and avoids the problem of frequent replacement of the heating tape, which is more convenient for equipment maintenance.

[0013] Preferably, as an improvement, the rotary drive mechanism, the forward heat sealing wheel and the reverse heat sealing wheel are arranged in pairs, and the two pairs of forward heat sealing wheels are respectively located on both sides of the moving trajectory of the packaging bag, and the two pairs of reverse heat sealing wheels are also respectively located on both sides of the moving trajectory of the packaging bag.

[0014] By adopting the above scheme, the packaging bag is first sent to a pair of positive heat sealing wheels for heat sealing, and then sent to a pair of reverse heat sealing wheels for heat sealing. The two positive heat sealing wheels roll in opposite rotation directions to heat seal the packaging bag from both sides of the packaging bag at the same time, and then the two reverse heat sealing wheels also roll in opposite rotation directions to heat seal both sides of the packaging bag, thereby providing extrusion force to the positive heat sealing wheels respectively to ensure the heat sealing effect of the heat sealing wheels on the packaging bag.

[0015] Preferably, as an improvement, the heat sealing strips on the pair of forward heat sealing wheels are symmetrically distributed, and the heat sealing strips on the pair of reverse heat sealing wheels are also symmetrically distributed.

[0016] By adopting the above scheme, on the one hand, the corresponding extrusion force can be provided when the heat sealing wheel on the opposite side is heat-sealed, and on the other hand, the same sealing structure can be formed on both sides of the packaging bag, thereby further ensuring the heat sealing effect and sealing effect of the packaging bag.

[0017] Preferably, as an improvement, a cavity is provided inside the heat sealing wheel, and the heating mechanism comprises a hot air blower, and the air outlet of the hot air blower is connected to the cavity.

[0018] By adopting the above scheme, the hot air blower sends hot air into the cavity to heat the heat sealing wheel, and the heat sealing strips on the heat sealing wheel are heated and can be used for heat sealing of the packaging bag. Compared with the conventional heat sealing by heating wire, this air-heating method of heat sealing has the advantage of ensuring that multiple heat sealing strips on the heat sealing wheel are heated uniformly, thereby making the temperature of the multiple heat sealing strips more uniform.

[0019] Preferably, as an improvement, a connecting pipe is provided at the rotation center of the heat sealing wheel, the connecting pipe and the heat sealing wheel are rotationally matched, and the connecting pipe connects the cavity with the blowing port of the hot air blower.

[0020] By adopting the above solution, the connecting pipe is used to centrally guide the hot air blown by the hot air blower into the cavity to ensure the heating effect of the hot air on the cavity. The connecting pipe and the heat-sealing wheel are rotated to avoid the connecting pipe interfering with the rotation of the heat-sealing wheel.

[0021] Preferably, as an improvement, an air inlet pipe is provided in the connecting pipe, one end of which is connected to the air outlet, and the other end extends into the cavity and is connected to the cavity; an air outlet pipe is also provided in the connecting pipe, one end of which is connected to the cavity, and the other end extends to the outside of the connecting pipe and is connected to the atmosphere; both ends of the connecting pipe are sealed.

[0022] By adopting the above scheme, the hot air is introduced directly from the blowing port into the cavity through the air inlet pipe, so that the hot air can enter the cavity more concentratedly to ensure the heating effect on the heat sealing wheel. The air outlet pipe is used to discharge the excess gas in the inner cavity in time to ensure the air pressure in the heat sealing wheel cavity and to ensure the continuous circulation of the gas, so as to effectively maintain the temperature of the heat sealing wheel. Using a separate connecting pipe for exhaust can make it easier to collect and recycle the exhaust gas.

[0023] Preferably, as an improvement, the rotary drive mechanism includes a gear transmission mechanism, the gear transmission mechanism includes a driving gear and a driven gear that are meshed together, the driving gear is connected to a driving source, the number of driven gears is the same as the number of heat sealing wheels on a single side of the moving trajectory of the packaging bag, and the driven gears are matched one by one with the heat sealing wheels; a sleeve is provided between the driven gear and the heat sealing wheel, the two ends of the sleeve are fixedly connected to the driven gear and the heat sealing wheel respectively, and the sleeve is connected to the cavity inside the heat sealing wheel, and the connecting tube is located in the sleeve and rotates with the sleeve.

[0024] By adopting the above solution, the driving source drives the driven gear to rotate through the driving gear, and when the driven gear rotates, it drives the fixedly connected heat sealing wheel to rotate together, so that the heat sealing wheel performs rotation heat sealing on the packaging bag. The use of this gear transmission mechanism to drive the heat sealing wheel has a more centralized structure, which is more conducive to the simplification of the device structure and the integration of the system.

[0025] In addition, the sleeve is used to connect the driven gear and the heat-sealing wheel to realize the rotational drive of the heat-sealing wheel by the driven gear. At the same time, the sleeve serves as the installation basis of the connecting pipe, providing a basis for the connection and installation between the connecting pipe and the heat-sealing wheel, so that the heat-sealing wheel can be connected to the rotation drive mechanism and the heating mechanism at the same time.

[0026] Preferably, as an improvement, the device further comprises conveyor chains arranged in pairs, both of which extend along the moving direction of the packaging bag, and the conveyor chains are located between the conveyor belt and the heat sealing unit and are arranged close to the heat sealing unit.

[0027] By adopting the above scheme, the conveyor chain is used to assist the conveyor belt in moving and transporting the packaging bag, and the conveyor chain can clamp and relatively fix the part of the packaging bag to be heat-sealed, so that the part of the packaging bag to be heat-sealed can be heat-sealed and sealed by the heat-sealing wheel in a fixed state. In this way, it can be ensured that the heat-sealed part of the packaging bag is in a horizontal and straight state without being skewed, which is beneficial to improving the quality of the heat-sealing.

[0028] In addition, the utility model also provides a packaging sealing structure, which can solve the problem of sealing discontinuity and incompleteness in existing linear sealing structures and the generation of sealing gaps. The sealing structure is a cyclic cross-distributed mesh and has at least two sealing points in any vertical direction.

[0029] Preferably, as an improvement, the structure has a plurality of first heat-sealed seal lines arranged in sequence and a plurality of second heat-sealed seal lines arranged in sequence, the first heat-sealed seal lines and the second heat-sealed seal lines having the same inclination angle and opposite inclination directions; at least every four adjacent first heat-sealed seal lines in a group intersect with the same second heat-sealed seal line at the same time, and the first heat-sealed seal lines at both ends of the group of first heat-sealed seal lines are respectively connected to the two ends of the second heat-sealed seal line; at least every four adjacent second heat-sealed seal lines in a group intersect with the same first heat-sealed seal line at the same time, and the second heat-sealed seal lines at both ends of the group of second heat-sealed seal lines are respectively connected to the two ends of the first heat-sealed seal line.

[0030] The use of this sealing structure not only increases the sealing area, significantly improves the sealing strength and reliability, and effectively prevents leakage, but also can form at least two sealing points in the same vertical direction. Even if one of the sealing points has a sealing defect, the other sealing points can continue to function, thus forming a multiple sealing barrier. This design greatly improves the sealing effect of the packaging bag, can effectively prevent sealing leakage of the packaging bag, and ensure the integrity of the packaging and the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a device structure diagram of Example 1 of the utility model.

[0032] Figure 2 It is a cross-sectional view of the heat sealing roller in Example 1 of the utility model.

[0033] Figure 3 This is a cross-sectional view of the heat sealing roller in Example 2.

[0034] Figure 4 This is a diagram of the device structure of Example 3.

[0035] Figure 5 Schematic diagram of the heat-sealed packaging bag and sealing structure.

[0036] Figure 6 This is a top view of the conveyor chain and heat sealing wheel in the device. DETAILED DESCRIPTION

[0037] The following is further described in detail through specific implementations, but the implementation of the utility model is not limited thereto. Unless otherwise specified, the technical means used in the following implementations are conventional means well known to those skilled in the art; the experimental methods used are all conventional methods; the materials, reagents, etc. used can all be obtained from commercial channels.

[0038] The figure marks in the drawings of the specification include: conveyor belt 1, forward heat sealing wheel 2, reverse heat sealing wheel 3, heat sealing strip 4, cavity 5, driving gear 6, driven gear 7, sleeve 8, connecting pipe 9, air inlet pipe 10, air outlet pipe 11, conveyor chain 12, first heat sealing line 13, second heat sealing line 14, packaging bag 15.

[0039] Example 1

[0040] The intelligent packaging and sealing device for caustic soda flakes in this embodiment has a structure as follows: Figure 1 As shown, it includes a conveyor belt 1 and a heat sealing unit, and the heat sealing unit is located above the conveyor belt 1. The conveyor belt 1 is used to transport the packaging bag 15 containing flake caustic soda to the heat sealing unit for sealing. The conveyor belt 1 is driven by a pulley (not shown in the figure), and the connection relationship between the two is a mature existing technology, which will not be repeated here.

[0041] The heat sealing unit includes a heat sealing wheel, and the heat sealing wheel is connected to a heating mechanism and a rotation drive mechanism. The rotation drive mechanism is used to drive the heat sealing wheel to rotate so that the heat sealing wheel rolls on the portion of the packaging bag 15 to be sealed, and the heating mechanism is used to heat the heat sealing wheel so that the heat sealing wheel rolls on the packaging bag 15 and heat seals different portions of the packaging bag 15.

[0042] The heat sealing wheel includes a forward heat sealing wheel 2 and a reverse heat sealing wheel 3 which are sequentially distributed along the length direction of the conveyor belt 1. The circumferential surface of the heat sealing wheel is provided with a plurality of heat sealing strips 4 which are sequentially arranged along the circumferential surface. The heat sealing strips 4 are all inclined strips, and the inclination directions of the heat sealing strips 4 on the forward heat sealing wheel 2 and the reverse heat sealing wheel 3 are opposite.

[0043] Combination Figure 1 and Figure 2 As shown, a cavity 5 is provided inside the heat sealing wheel. The rotary drive mechanism includes a gear transmission mechanism and a driving source. The gear transmission mechanism includes a driving gear 6 and a driven gear 7 that are meshed and arranged. The driving gear 6 is connected to the driving source. The driving source in this embodiment is a motor. The motor is fixed to a frame outside the device. The driving gear 6 is fixedly connected to the power output shaft of the motor. In actual application, a reducer can also be installed between the driving gear 6 and the motor to make the speed of the driving gear 6 reach a suitable level. The number of driven gears 7 is the same as the number of heat sealing wheels on one side of the moving track of the packaging bag 15, and the driven gears 7 are matched one by one with the heat sealing wheels and are fixedly connected. In the present embodiment, there are two driven gears 7 and two heat-sealing wheels, and a sleeve 8 is provided between the driven gear 7 and the heat-sealing wheel. The two ends of the sleeve 8 are respectively fixedly connected to the driven gear 7 and the heat-sealing wheel by flat keys. Of course, other common hole-shaft fixed connection methods can be used to fix the sleeve 8 and the driven gear 7, and the sleeve 8 and the heat-sealing wheel. This is something that a person skilled in the art can easily think of in order to achieve relative fixation between the sleeve 8 and the driven gear 7, and between the sleeve 8 and the heat-sealing wheel, and it will not be repeated here. The end of the sleeve 8 connected to the heat-sealing wheel extends into the cavity 5 of the heat-sealing wheel and is connected to the cavity 5 inside the heat-sealing wheel. In addition, in order to ensure the stability of the structure during operation, the driving shaft of the driving gear 6 and the heat-sealing wheel can also be rotatably mounted on the frame outside the device, for example in combination with Figure 1 As shown, the lower end of the driving shaft of the driving gear 6 is rotatably mounted on the frame through a bearing, and at the same time, the bottom flange of the heat sealing wheel is connected to a vertical fixed shaft that is bolted to the frame, thereby ensuring the operating stability of the driving gear 6 and the heat sealing wheel. These connection and installation methods are well known to technical personnel in this field in order to ensure the stable operation of the structure and will not be repeated here.

[0044] The heating mechanism includes a hot air blower (not shown in the figure), and the air outlet of the hot air blower is connected to the cavity 5 inside the heat sealing wheel. Specifically:

[0045] like Figure 2As shown, a connecting pipe 9 is provided at the rotation center of the heat sealing wheel, and the connecting pipe 9 is located in the sleeve 8. The connecting pipe 9 and the heat sealing wheel are rotationally matched. In this embodiment, since the sleeve 8 is fixedly connected to the heat sealing wheel, the rotational match between the connecting pipe 9 and the heat sealing wheel is achieved by making the connecting pipe 9 and the sleeve 8 rotate and match. The specific rotational match mode, for example, can be provided with a bearing between the connecting pipe 9 and the sleeve 8 and rotated and connected by a bearing (not shown in the figure), and the connecting pipe 9 connects the cavity 5 with the blowing port of the hot air blower, and one end of the connecting pipe 9 connected to the blowing port extends to the outside of the sleeve 8 and is fixed on the frame outside the packaging sealing device to fix the connecting pipe 9, so that the connecting pipe 9 is used to connect the hot air blower and the cavity 5, and also serves as a mounting base for the heat sealing wheel, the driven gear 7 and the sleeve 8, providing a basis for the installation of the above three structures. In addition, in order to facilitate the transportation of hot air, the blowing port of the hot air blower and the connecting pipe 9 can be connected by a pipe with a certain degree of softness according to the situation, so that it is more convenient to install the equipment structure.

[0046] In addition, the rotary drive mechanism, the forward heat sealing wheel 2 and the reverse heat sealing wheel 3 in this embodiment are respectively arranged in pairs, and the two pairs of forward heat sealing wheels 2 are respectively located on both sides of the moving track of the packaging bag 15, and the two pairs of reverse heat sealing wheels 3 are also respectively located on both sides of the moving track of the packaging bag 15, that is, Figure 1 The front and rear sides shown. The heat sealing strips 4 on the paired forward heat sealing wheels 2 are symmetrically distributed, that is, the inclination directions of the heat sealing strips 4 on the paired forward heat sealing wheels 2 are opposite, and the inclination directions of the heat sealing strips 4 on the paired reverse heat sealing wheels 3 are also opposite. In this way, when the paired forward heat sealing wheels 2 rotate in opposite directions, the heat sealing strips 4 on the two forward heat sealing wheels 2 can abut against each other and simultaneously squeeze and heat seal the packaging bag 15, and the directions of the heat sealing lines left on the packaging bag 15 are consistent, which can ensure the sealing effect of the packaging bag 15 after heat sealing. The heat sealing strips 4 on the paired reverse heat sealing wheels 3 are also symmetrically distributed, which is consistent with the principle and effect of the aforementioned forward heat sealing wheels 2, and will not be repeated here.

[0047] In practical application, this embodiment is combined with Figure 1 , Figure 2 and Figure 6As shown, the conveyor belt 1 conveys the packaging bag 15 containing caustic soda flakes to the heat sealing unit for heat sealing. When the packaging bag 15 enters the heat sealing unit, it first passes between the two pairs of positive heat sealing wheels 2. At this time, the driving gear 6 rotates under the drive of the motor and pushes the driven gear 7 meshing with it to rotate. Since the heat sealing wheel is fixedly connected to the driven gear 7 through the sleeve 8, the heat sealing wheel follows the driven gear 7 to rotate and rolls on the packaging bag 15. At the same time, the hot air blower blows hot air into the cavity 5 through the connecting pipe 9 to heat the heat sealing wheel. The heat sealing strip 4 on the heat sealing wheel heat seals the packaging bag 15, leaving a positively inclined sealing line on the packaging bag 15. While the positive heat sealing wheel 2 is heat sealing the packaging bag 15, the conveyor belt 1 continues to move forward. Figure 1 or Figure 6 The packaging bag 15 is conveyed on the left side as shown, and then the packaging bag 15 enters between the paired reverse heat-sealing wheels 3, which are also driven by the driving gear 6 and the driven gear 7 to roll on the packaging bag 15, and heat-seal the packaging bag 15 under the heating action of the hot air blower, thereby forming a reverse inclined sealing line on the packaging bag 15. The two sets of rotary drive mechanisms respectively drive the two sets of positive heat-sealing wheels 2 to rotate in opposite directions, and the two sets of reverse heat-sealing wheels 3 also rotate in opposite directions, thereby rolling heat-sealing both sides of the packaging bag 15 at the same time, and the heat-sealed packaging bag 15 is transported out from the left side of the device by the conveyor belt 1.

[0048] This embodiment also provides a packaging sealing structure, which is as follows Figure 5 As shown, the sealing structure as a whole is in the shape of a cyclically cross-distributed mesh, and has at least two sealing points in any vertical direction. Specifically, it has a plurality of first heat-sealed sealing lines 13 and a plurality of second heat-sealed sealing lines 14 arranged in sequence, and the first heat-sealed sealing lines 13 and the second heat-sealed sealing lines 14 have the same inclination angle and opposite inclination direction; in the sealing structure, at least every four adjacent first heat-sealed sealing lines 13 in a group (the present embodiment takes every four adjacent first heat-sealed sealing lines as an example to illustrate the specific structure) intersect with the same second heat-sealed sealing line 14 at the same time, and the first heat-sealed sealing lines 13 at both ends of the group of first heat-sealed sealing lines 13 are respectively connected to the two ends of the second heat-sealed sealing line 14; at the same time, at least every four adjacent second heat-sealed sealing lines 14 in a group (the present embodiment takes every four adjacent first heat-sealed sealing lines as an example to illustrate the specific structure) intersect with the same first heat-sealed sealing line 13 at the same time, and the second heat-sealed sealing lines 14 at both ends of the group of second heat-sealed sealing lines 14 are respectively connected to the two ends of the first heat-sealed sealing line 13.

[0049] The packaging sealing device in this embodiment can form the above-mentioned mesh sealing structure for the packaging bag 15, thereby increasing the sealing area of ​​the sealing structure of the packaging bag 15, improving the sealing strength and sealing reliability of the packaging bag 15, and effectively preventing the packaging bag 15 from leaking. At the same time, the formed sealing structure forms a multi-layer cross seal on the packaging bag 15, which can form at least two sealing points in the same vertical direction, forming a multiple sealing barrier, greatly improving the stability, continuity and integrity of the seal, and can effectively ensure the packaging quality of caustic soda flakes. At the same time, the heat sealing wheel used in the device performs rotary heat sealing on the packaging bag 15, which not only effectively reduces the length of the heat sealing unit and the space occupied, but also can effectively avoid the adhesion between the packaging bag 15 and the heat sealing structure, and is more conducive to the separation between the packaging bag 15 and the heat sealing structure.

[0050] Embodiment 2:

[0051] This embodiment is based on the embodiment 1. Figure 3 As shown, an air inlet pipe 10 and an air outlet pipe 11 are also provided in the connecting pipe 9. One end of the air inlet pipe 10 is connected to the air outlet of the hot air blower, and the other end extends into the cavity 5 and is connected to the cavity 5. One end of the air outlet pipe 11 is connected to the cavity 5, and the other end extends to the outside of the connecting pipe 9 and is connected to the atmosphere. At the same time, both ends of the connecting pipe 9 are sealed, that is, Figure 3 The upper and lower ends of the connecting pipe 9 are shown to be in a closed state.

[0052] During the specific implementation process, the difference between this embodiment and embodiment 1 is that the hot air blower delivers hot air into the cavity 5 through the air inlet pipe 10 to maintain the temperature of the heat sealing wheel; the excess gas in the cavity 5 is discharged through the air outlet pipe 11, so that the hot air in the cavity 5 is continuously circulated and renewed, and the entry and exit of the hot air is more orderly.

[0053] Example 3

[0054] This embodiment is based on the above-mentioned embodiment. Figure 4 and Figure 6 As shown together, the device also includes a pair of conveyor chains 12, each of which is extended along the moving direction of the packaging bag 15, and the conveyor chains 12 are located between the conveyor belt 1 and the heat sealing unit and are arranged close to the heat sealing unit. The conveyor chain 12 in this embodiment is driven by a sprocket, and the sprocket is meshed with the conveyor chain 12, and the movement of the conveyor chain 12 is controlled by driving the sprocket by an external motor.

[0055] This embodiment is based on the previous embodiment. During implementation, the packaging bag 15 passes between the paired conveyor chains 12. The conveyor chains 12 assist the conveyor belt 1 in conveying the packaging bag 15. At the same time, the conveyor chains 12 on both sides of the packaging bag 15 clamp and fix the portion of the packaging bag 15 to be heat-sealed, so that the packaging bag 15 is heat-sealed in a fixed posture, thereby further ensuring the heat-sealing quality of the packaging bag 15.

[0056] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the technical solution of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An intelligent packaging and sealing device for caustic soda flakes, comprising a conveyor belt and a heat sealing unit, wherein the heat sealing unit is located above the conveyor belt, and is characterized in that: The heat sealing unit includes a heat sealing wheel, which includes a forward heat sealing wheel and a reverse heat sealing wheel which are sequentially distributed along the length direction of the conveyor belt. The circumferential surface of the heat sealing wheel is provided with a plurality of heat sealing strips which are sequentially arranged along the circumferential surface. The heat sealing strips are all in the shape of inclined strips, and the inclination directions of the heat sealing strips on the forward heat sealing wheel and the reverse heat sealing wheel are opposite. The heat sealing wheels are connected with a heating mechanism and a rotating drive mechanism. Under the action of the rotating drive mechanism and the heating mechanism, the heat sealing wheel can heat-seal on the packaging bag to form a mesh sealing structure which is cyclically and cross-distributed and has at least two sealing points in any vertical direction.

2. The intelligent packaging and sealing device for caustic soda flakes according to claim 1, characterized in that: The rotary drive mechanism, the forward heat sealing wheel and the reverse heat sealing wheel are arranged in pairs, and the two pairs of forward heat sealing wheels are respectively located on both sides of the moving track of the packaging bag, and the two pairs of reverse heat sealing wheels are also respectively located on both sides of the moving track of the packaging bag.

3. The intelligent packaging and sealing device for caustic soda flakes according to claim 2, characterized in that: The heat sealing strips on the paired forward heat sealing wheels are symmetrically distributed, and the heat sealing strips on the paired reverse heat sealing wheels are also symmetrically distributed.

4. The intelligent packaging and sealing device for caustic soda flakes according to claim 3 is characterized in that: A cavity is arranged inside the heat-sealing wheel, and the heating mechanism comprises a hot air blower, wherein the blowing port of the hot air blower is connected with the cavity.

5. The intelligent packaging and sealing device for caustic soda flakes according to claim 4, characterized in that: A connecting pipe is provided at the rotation center of the heat sealing wheel, and the connecting pipe is rotationally matched with the heat sealing wheel, and the connecting pipe connects the cavity with the blowing port of the hot air blower.

6. The intelligent packaging and sealing device for caustic soda flakes according to claim 5, characterized in that: An air inlet pipe is provided in the connecting pipe, one end of which is connected to the air outlet, and the other end extends into the cavity and is connected to the cavity; an air outlet pipe is also provided in the connecting pipe, one end of which is connected to the cavity, and the other end extends to the outside of the connecting pipe and is connected to the atmosphere; both ends of the connecting pipe are sealed.

7. The intelligent packaging and sealing device for caustic soda flakes according to claim 6, characterized in that: The rotary drive mechanism includes a gear transmission mechanism, which includes a driving gear and a driven gear that are meshed together, the driving gear is connected to a driving source, the number of driven gears is the same as the number of heat-sealing wheels on a single side of the moving trajectory of the packaging bag, and the driven gears are matched one by one with the heat-sealing wheels; a sleeve is provided between the driven gear and the heat-sealing wheel, the two ends of the sleeve are fixedly connected to the driven gear and the heat-sealing wheel respectively, and the sleeve is connected to the cavity inside the heat-sealing wheel, and the connecting pipe is located in the sleeve and rotates with the sleeve.

8. The intelligent packaging and sealing device for caustic soda flakes according to any one of claims 1 to 7, characterized in that: The device also includes conveying chains arranged in pairs, which are both extended along the moving direction of the packaging bag. The conveying chains are located between the conveyor belt and the heat sealing unit and are arranged close to the heat sealing unit.

9. A packaging sealing structure formed by using the device according to claim 8, characterized in that: The sealing structure is in the form of a cyclically cross-distributed mesh and has at least two sealing points in any vertical direction.

10. A packaging sealing structure according to claim 9, characterized in that: The structure comprises a plurality of first heat-sealed seal lines arranged in sequence and a plurality of second heat-sealed seal lines arranged in sequence, wherein the first heat-sealed seal lines and the second heat-sealed seal lines have the same inclination angle and opposite inclination directions; at least every four adjacent first heat-sealed seal lines in a group intersect with the same second heat-sealed seal line at the same time, and the first heat-sealed seal lines at both ends of the group of first heat-sealed seal lines are respectively connected to the two ends of the second heat-sealed seal line; at least every four adjacent second heat-sealed seal lines in a group intersect with the same first heat-sealed seal line at the same time, and the second heat-sealed seal lines at both ends of the group of second heat-sealed seal lines are respectively connected to the two ends of the first heat-sealed seal line.

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