Emulsion explosive small charge vacuum packaging machine

Abstract

The application belongs to the technical field of emulsion explosive processing, and discloses a small cartridge vacuum packaging machine for emulsion explosives, which comprises a base, a movable plate arranged above the base and driven to lift by a pneumatic cylinder, and a mounting seat arranged above the movable plate, wherein an upper portion of the mounting seat is provided with a movable seat for carrying small cartridges. The whole is connected by using a synchronous insertion rod penetrating through a guide lug, so that the conventional bolt fastening step is eliminated. A locking assembly with a limiting spring and a positioning rod is arranged between adjacent mounting seats. When array docking is performed, an operator pulls a locking pull rod, releases the pull rod after the insertion plate is pushed into the insertion slot and is aligned with the insertion hole, the limiting spring releases the pre-tightening force to drive the positioning rod to pass through the insertion hole, elastic insertion and mechanical locking are achieved, the locking structure can resist the vibration force generated when the equipment reciprocates up and down, the position stability after the combination of multiple rows of limiting rings is ensured, and the alignment accuracy in the batch packaging process is ensured.

Description

Technical Field

[0001] This invention belongs to the field of emulsion explosive processing technology, specifically a vacuum packaging machine for small emulsion explosive cartridges. Background Technology

[0002] Emulsion explosives, widely used in mining, engineering blasting, and other fields, are favored for their excellent water resistance, high safety, and good detonation performance. In actual production and application, to meet the needs of different blasting apertures and charge structures, emulsion explosives typically need to be processed into small cartridges of various specifications. To ensure the stability of these small cartridges during storage and transportation, and to prevent emulsion demulsification, crystallization, or moisture loss, strict vacuum sealing treatment is essential. Existing vacuum sealing equipment for emulsion explosive cartridges mostly adopts a multi-station array structure to improve production efficiency, using cylinders and other drive mechanisms in conjunction with mechanical grippers and vacuum nozzles to complete the cartridge positioning and sealing operations.

[0003] However, existing multi-station batch vacuum processing equipment suffers from numerous insurmountable defects in both structural design and practical application. Firstly, in terms of assembling and disassembling packaging modules, traditional equipment often employs cumbersome bolt tightening operations to achieve multi-station splicing and fixing. This method not only consumes a significant amount of manpower and time, leading to extremely high labor intensity for workers, but also makes it difficult to achieve flexible and rapid model changeover and assembly when facing production demands for different batches and processing scales. Furthermore, arrays rigidly connected by bolts are prone to loosening under long-term vibration and high-speed operation, resulting in inaccurate array positioning, which in turn affects the alignment accuracy of subsequent clamping and vacuuming actions, increasing the defect rate.

[0004] Secondly, in existing equipment, the actions of each functional component (such as the positioning and clamping component and the vacuum sealing component) are often independent during the vacuum sealing process, lacking a synchronized and adaptive linkage structure. Traditional clamping mechanisms typically require separate power sources (such as independent pneumatic grippers) and complex control systems, making the equipment structure extremely bulky and cumbersome, and making it difficult to provide adaptive and flexible clamping according to the actual diameter of the explosive cartridge. More seriously, under the influence of vacuum suction or external sealing actions, the explosive cartridge is prone to tilting or shifting, and due to the lack of a synchronized pressing and straightening structure for the top of the packaging bag, air is easily retained at the top of the packaging bag, resulting in irregular wrinkles. These wrinkles can lead to serious quality problems such as incomplete sealing and air leakage in the subsequent heat sealing process, significantly reducing the yield of the finished product, and may even cause safety hazards such as explosive performance failure. Summary of the Invention

[0005] The purpose of this invention is to provide a vacuum packaging machine for small cartridges of emulsion explosives to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a vacuum packaging machine for small cartridges of emulsion explosives, comprising a base, a movable plate disposed above the base and driven to rise and fall by a cylinder, and a mounting seat disposed above the movable plate, wherein a movable seat for supporting small cartridges is disposed above the mounting seat.

[0007] It also includes a limiting ring that is fixed in position and does not rise or fall with the movable plate. The limiting ring is located above the movable seat and has through holes on both sides.

[0008] A self-limiting component is connected between the bottom end of the limiting ring and the movable seat. The self-limiting component includes a first fixed seat installed on the movable seat, a second fixed seat located obliquely above the first fixed seat, and a connecting rod hinged between the first fixed seat and the second fixed seat.

[0009] A limiting rod is connected above the second fixed base. The limiting rod slides through the through hole and its end is connected to a limiting clamping ring located inside the limiting ring.

[0010] As the movable seat descends with the movable plate, the vertical relative displacement between the movable seat and the limiting ring pulls the connecting rod to deflect and converts the vertical downward pulling force into a horizontal thrust, thereby forcing the limiting rod to slide inward along the through hole. This drives the limiting clamping rings on both sides to move synchronously toward the center and clamp and lock the small pill.

[0011] As a further technical solution of the present invention, a limiting plate is provided above the second fixed base, and the limiting rod is installed on the corresponding limiting plate;

[0012] The bottom end of the limiting plate is rotatably connected to a threaded sleeve rod, and the top end of the second fixed seat is equipped with a threaded adjusting rod that cooperates with the threaded sleeve rod, which is used to adjust the initial clamping distance of the limiting clamping ring before assembly to adapt to drug cartridges of different diameters.

[0013] As a further technical solution of the present invention, the inner side of the limiting clamping ring is provided with an anti-slip groove for increasing the clamping friction.

[0014] As a further technical solution of the present invention, the multiple limiting rings constitute a matrix packaging array, wherein adjacent limiting rings are connected end to end by a card block on one side and a card slot on the other side to form a single row of limiting rings.

[0015] A guide ear plate is installed at the bottom center of the movable seat, and a synchronous plug rod is connected through and movably engaged with multiple guide ear plates corresponding to the same single row limit ring group.

[0016] As a further technical solution of the present invention, a locking component is installed at the middle position between every two adjacent mounting seats, and plug-in plates that are inserted and cooperate with the locking component are installed on both the front and rear sides of the guide ear plate located at the middle of the single row.

[0017] As a further technical solution of the present invention, the locking component includes a locking sleeve fixed between adjacent mounting bases, and the locking sleeve has insertion slots on both sides for the insertion plate to be inserted.

[0018] As a further technical solution of the present invention, a positioning plate is connected to the pull rod, and positioning rods for penetrating the insertion slot and the insertion plate are installed on both sides of the inner side of the positioning plate.

[0019] As a further technical solution of the present invention, one side of the plug plate and one side of the plug slot are provided with corresponding plug holes; the outer side of the locking rod is movably sleeved with a limit spring, and the two sides of the limit spring abut against the positioning plate and the locking sleeve respectively, configured to release the preload when the plug holes are aligned with each other, so as to drive the positioning rods on both sides to elastically insert into the plug holes to form a dead lock.

[0020] As a further technical solution of the present invention, a vacuum assembly is also included. The vacuum assembly includes a vacuum three-way valve that is installed in the middle of the movable seat and located directly below the small pill cartridge. Vacuum suction tubes extending upward and penetrating the movable seat are connected to both sides of the vacuum three-way valve. A main three-way valve is connected between the relatively close top ends of the two vacuum suction tubes. The output end of the main three-way valve is used to connect to an external negative pressure pump.

[0021] As a further technical solution of the present invention, the bottom end of the main three-way valve is connected to a threaded adjusting rod, and the bottom end of the threaded adjusting rod is equipped with an abutment seat for abutting against the top vacuum packaging bag of the small medicine roll.

[0022] As a further technical solution of the present invention, the extension length of the threaded adjusting rod is spatially adapted to the movement stroke of the self-limiting component;

[0023] The device is configured such that when the limiting clamping ring just completes the clamping and positioning of the small pill roll on the side, the bottom end of the abutment seat moves down with the movable seat and just contacts the vacuum packaging bag at the top of the small pill roll and remains in a compressed state, so as to help guide the residual air inside the packaging bag downward and extract it through the vacuum three-way valve at the bottom.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention achieves rapid assembly and locking of matrix packaging arrays through the cooperation of a snap-fit ​​structure, synchronous insertion rods, and locking components, improving equipment changeover efficiency and positioning accuracy. In this invention, the limiting rings are connected end-to-end by snap-fit ​​blocks and slots, and are connected as a whole by synchronous insertion rods passing through guide ear plates, eliminating the need for conventional bolt tightening. A locking component with limiting springs and positioning rods is configured between adjacent mounting seats. When the array is docked, the operator pulls the locking rod, and after the insertion plate is pushed into the insertion slot and aligned with the insertion hole, it is released. The limiting spring releases its preload force to drive the positioning rod through the insertion hole, achieving elastic insertion and mechanical locking. This locking structure can resist the vibration force generated by the reciprocating motion of the equipment, ensuring the positional stability of the multi-row limiting ring combination and guaranteeing the alignment accuracy during batch packaging.

[0026] 2. This invention converts vertical lifting displacement into horizontal clamping power through a self-limiting component, achieving adaptive locking for small pill cartridges. This application utilizes the relative displacement difference between the stationary limiting ring and the descending movable seat as the driving force. When the movable seat descends, it pulls the first fixed seat, forcing the upper limiting plate to move inward through a linkage mechanism, thereby driving the limiting rod to slide and causing the limiting clamping ring to move towards the center synchronously to clamp the pill cartridge. The movement trajectory of this linkage mechanism has a buffering effect at the end of the clamping action, preventing the action from being too fast and causing compression damage to the pill cartridge. In addition, the mechanism is equipped with a threaded sleeve rod and a threaded adjusting rod, which can adjust the initial distance between the limiting ring and the movable seat to accommodate pill cartridges of different diameters. The components in contact with the pill cartridge are treated with anti-static materials, and the pressure reduction and anti-load design of the explosion-proof cylinder improves the safety of equipment operation.

[0027] 3. This invention integrates the vacuuming component and the top pressing structure, achieving the linkage of side clamping, top pressing, and vacuuming within one drive stroke. This improves the airtightness and sealing quality of the packaging. Above the vacuum three-way valve at the bottom, a top pressing structure with a threaded adjusting rod and an abutment seat is set downward through the main three-way valve. When the limiting clamping ring of the self-limiting component clamps the side of the medicine roll, the abutment seat at the bottom of the threaded adjusting rod contacts the vacuum packaging bag at the top of the small medicine roll and maintains a pressing state. This pressing force helps to squeeze and guide the residual air inside the packaging bag downward, which is then smoothly extracted through the vacuum three-way valve at the bottom, improving the venting effect. At the same time, it smooths out the wrinkles in the top area of ​​the packaging bag, solving the problems of incomplete vacuuming and wrinkles easily generated during sealing in traditional equipment. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2This is an exploded view of the mounting base and synchronous insertion rod structure of the present invention;

[0030] Figure 3 This is a separate cross-sectional schematic diagram of the locking component structure of the present invention;

[0031] Figure 4 This is a schematic diagram showing the engagement state of the multiple limiting rings of the present invention;

[0032] Figure 5 This is a partial cross-sectional schematic diagram of the vacuum pumping assembly structure of the present invention;

[0033] Figure 6 This is a schematic diagram showing the cooperation of the movable seat, self-limiting component, and vacuuming component structure of the present invention;

[0034] Figure 7 This is an exploded view of the limiting ring and self-limiting component structure of the present invention;

[0035] Figure 8 This is a partially exploded view of the self-limiting component structure of the present invention.

[0036] In the diagram: 1. Base; 2. Cylinder; 3. Movable plate; 4. Mounting seat; 5. Synchronous insertion rod; 6. Locking assembly; 601. Locking pull rod; 602. Positioning rod; 603. Positioning plate; 604. Locking sleeve; 605. Limiting spring; 7. Movable seat; 8. Self-limiting assembly; 801. First fixed seat; 802. Second fixed seat; 803. Connecting rod; 804. Threaded sleeve rod; 805. Threaded adjusting rod; 806. Limiting plate; 807. Limiting rod; 808. Limiting clamping ring; 9. Vacuum assembly; 901. Vacuum three-way valve; 902. Vacuum suction tube; 903. Main three-way valve; 904. Threaded adjusting rod; 905. Abutment seat; 10. Limiting ring; 11. Through hole; 12. Guide ear plate. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 8As shown, this embodiment of the invention provides a vacuum sealing machine for small cartridges of emulsion explosives. It mainly includes a base 1 installed on a flat ground and a movable plate 3 set directly above the base 1. Cylinders 2 are installed at the four corners of the top of the base 1, and the output end of the cylinders 2 is connected to the bottom end of the movable plate 3. Multiple cylinders 2 are synchronously controlled by a controller. The movable plate 3 is raised and lowered by controlling multiple cylinders 2 simultaneously. In order to achieve rapid sealing of multiple small cartridges, mounting seats 4 are installed at equal intervals on the top of the movable plate 3. Multiple movable seats 7 are set above the mounting seats 4. Each movable seat 7 corresponds to an independent small cartridge. In order to synchronously vacuum seal multiple small cartridges, a limit ring 10 is set above the movable seat 7.

[0039] Specifically, through holes 11 are provided on both sides of the limiting ring 10, and a self-limiting component 8 is provided at the bottom end of the limiting ring 10. The two sides of the bottom end of the self-limiting component 8 are connected to the two sides of the top end of the movable seat 7, and the two sides of the top end of the self-limiting component 8 pass through the through holes 11 and are movably sleeved with the through holes 11.

[0040] To enable rapid assembly of multiple limiting rings 10, a slot is provided on one side of the top of the limiting ring 10, and a corresponding block is provided on the other side. The two limiting rings 10 are connected end to end by the engagement of the block and the slot. Specifically, the number of limiting rings 10 is determined according to the number of small pills that need to be vacuumed in a single operation. Multiple limiting rings 10 are connected end to end to form a row of limiting rings 10. In order to connect multiple rows of limiting rings 10, this application also installs a guide ear plate 12 in the middle of the bottom of the movable seat 7.

[0041] When multiple limit rings 10 are connected end to end to form a row of limit rings 10, the synchronous insertion rod 5 is inserted into the interior of multiple guide ear plates 12 and engages with them to complete the splicing process of a row of limit rings 10.

[0042] After multiple limit rings 10 are positioned, in order to prevent the limit rings 10 from being pulled by the movable plate 3 below, they are connected to the external frame by conventional fixing methods such as hoisting. After fixing, the limit rings 10 maintain a constant height and do not move up and down with the movable plate 3. The above connection method is not shown in the figure. The fixing method can be selected according to the site environment.

[0043] Meanwhile, the guide ear plate 12 located in the middle of the row has corresponding locking plates installed on its front and rear sides. In the middle position between every two mounting seats 4, a locking component 6 corresponding to the locking plate is installed. When the multiple rows of limiting rings 10 are assembled to form an array of limiting rings 10, the locking plate and the locking component 6 are engaged and locked.

[0044] The locking assembly 6 includes a locking sleeve 604, which is fixed to the adjacent mounting bases 4 on both sides and is installed at the middle position between the two adjacent mounting bases 4. The locking sleeve 604 has insertion slots on both sides. Correspondingly, the guide ear plate 12 located below the middle movable base 7 of a row is equipped with insertion plates corresponding to the insertion slots on both sides. A positioning plate 603 is provided on one side of the locking sleeve 604, and a locking pull rod 601 is installed in the middle of the positioning plate 603. The locking pull rod 601 passes through the middle of the locking sleeve 604 and is movably sleeved with it. In order to realize the quick reset of the locking pull rod 601, a limit spring 605 is movably sleeved on the outer side of the locking pull rod 601. The two sides of the limit spring 605 are connected to the inner side of the positioning plate 603 and one side of the locking sleeve 604, respectively.

[0045] Furthermore, positioning rods 602 are installed on both sides of the inner side of the positioning plate 603. Specifically, insertion holes are provided on one side of the guide ear plate 12 insertion plate and one side of the insertion slot. When the multi-row limiting ring 10 is assembled, the insertion plates on both sides of the central guide ear plate 12 are inserted into the insertion slot, and the insertion holes on the insertion plates correspond to the insertion holes on the insertion slot. At this time, under the reset action of the limiting spring 605, the positioning rods 602 on both sides can be driven to insert into the insertion holes on the insertion plates and insertion slots to complete the locking process. At this time, a complete matrix-shaped limiting ring 10 can be formed.

[0046] Example: When assembling multiple limiting rings 10 to form a matrix, firstly, according to the required number of small vacuum cartridges for a single vacuuming operation, multiple limiting rings 10 are connected end-to-end in a row using the locking blocks on one side of their top end and the locking slots on the other side. Then, the synchronous insertion rod 5 is inserted through the guide ear plate 12 at the bottom center of the row's movable seat 7 for movable locking, completing the splicing and positioning of a single row. After assembly, it is fixed to the external frame using conventional methods such as hoisting, so that it does not move up and down with the movable plate 3 during subsequent operations. When it is necessary to assemble multiple rows into a complete matrix, the operator pulls the locking rod 601 located in the middle of two adjacent mounting seats 4 outward, driving the positioning plate. 603 moves and compresses the limiting spring 605, thereby causing the positioning rods 602 on both sides to exit the insertion slot area of ​​the locking sleeve 604. Then, the insertion plates on both sides of the guide ear plate 12 located at the middle of the single row are pushed into the insertion slot of the locking sleeve 604. When the insertion holes on the insertion plates are aligned with the insertion holes on the insertion slots, the operator releases the locking lever 601. The limiting spring 605 releases its elastic force to drive the positioning plate 603 to quickly reset, thereby driving the positioning rod 602 to pass through and insert into the aligned insertion holes, completing the deadlock between the module in this row and the bottom structure. By repeating this operation to splice multiple rows, multiple limiting rings 10 can be stabilized and quickly formed into a complete matrix-shaped packaging array.

[0047] By utilizing the snap-fit ​​structure and synchronous insertion rod 5, modular and tool-free rapid assembly of a single-row workstation is achieved. A locking component 6 with a self-resetting function is adopted. Through the mechanical linkage of the limit spring 605 and the positioning rod 602, one-click elastic insertion and automatic locking are achieved when multiple rows of structures are docked. This design not only completely eliminates the cumbersome bolt tightening operation, significantly reducing the labor intensity of workers and shortening the time for equipment changeover or assembly, but also ensures absolute stability and precise alignment of the matrix-type packaging module assembly from a mechanical structure perspective. This significantly improves the production efficiency and reliability of batch vacuum packaging, solving the technical problems of cumbersome assembly and disassembly of packaging modules, inaccurate array positioning, and difficulty in flexibly adjusting the single-processing scale according to actual batch requirements in traditional emulsion explosive small cartridge packaging equipment during multi-station batch vacuum processing.

[0048] In order to limit and lock the small pill roll during vacuum sealing, this application mainly introduces a self-limiting component 8, which mainly includes a first fixed seat 801 installed on both sides of the top of the movable seat 7. The end of the first fixed seat 801 away from the movable seat 7 is movably connected to the connecting rod 803 through a rotating shaft, and the end of the connecting rod 803 away from the first fixed seat 801 is movably connected to the second fixed seat 802 through a rotating shaft.

[0049] A limiting plate 806 is provided above the second fixed seat 802, and the limiting plate 806 is located on both sides of the limiting ring 10. A limiting rod 807 is installed at the relatively close end of the two limiting plates 806. The limiting rod 807 passes through one side of the through hole 11 and is located inside the limiting ring 10. A limiting clamping ring 808 located inside the limiting ring 10 is installed at the relatively close end of the two limiting rods 807. In order to improve the friction, a corresponding anti-slip groove is provided on the inner side of the limiting clamping ring 808.

[0050] In order to make fine adjustments to the device, a threaded sleeve 804 is rotatably connected to the bottom end of the limiting plate 806, and a threaded adjusting rod 805 is installed at the top end of the second fixed seat 802, wherein the threaded sleeve 804 and the threaded adjusting rod 805 are threadedly connected.

[0051] Specifically, when it is necessary to fine-tune the self-limiting component 8 to adapt to the clamping of small pill rolls of different diameters, the threaded sleeve rod 804 can be rotated to drive the threaded adjusting rod 805 to move up and down relative to the threaded sleeve rod 804, thereby adjusting the distance between the limiting ring 10 and the movable seat 7. This adjustment process must be completed before the limiting ring 10 is assembled.

[0052] Example: Before clamping the small pill rolls, the pre-fitted vacuum-sealed pill rolls are placed vertically above the movable seat 7. Then, the control system drives multiple cylinders 2 to operate synchronously, causing the movable plate 3 to descend as a whole. This causes the multiple movable seats 7 mounted on it to move downwards synchronously. Since the limiting ring 10 is previously fixed and maintains a constant height, the downward movement of the movable seat 7 increases the vertical distance between it and the limiting ring 10. At this time, the self-limiting assembly 8 connecting the two is mechanically linked, causing the movable seat 7 to descend further. The first fixed seat 801 moves downward, and by changing the tilt angle of the connecting rod 803, the vertical downward pulling force is converted into a horizontal thrust, forcing the second fixed seat 802 and the upper limiting plate 806 to move inward. Under this linkage, the limiting rod 807 slides along the through hole 11 into the limiting ring 10, driving the two opposing limiting clamping rings 808 to move towards the center synchronously, and using the anti-slip grooves on their inner sides to increase friction, finally clamping and locking the small pill roll with vacuum packaging bag in the center position accurately and firmly from both sides.

[0053] Furthermore, to ensure precise control of the clamping force for small-diameter pill cartridges and avoid excessive clamping force leading to cartridge deformation or damage, the movement trajectory of the self-limiting component 8 in this invention follows the following kinematic formula:

[0054] Let the length of link 803 be In its initial state (unclamped state), the angle between it and the horizontal plane is... The initial height of the movable seat 7 is When cylinder 2 drives the movable seat 7 to descend a vertical distance At that time, the angle between connecting rod 803 and the horizontal plane becomes .

[0055] According to geometric relationships, the vertical displacement and angular change satisfy the following formula:

[0056]

[0057] Simultaneously, the horizontal unilateral displacement of the limiting clamp 808 towards the center Satisfying the formula:

[0058]

[0059] By combining the above formula, the downward stroke of cylinder 2 can be precisely set. Strictly control the total closing volume of the two side limiting clamps 808 2 In actual implementation, the length L of connecting rod 803 is preferably 80mm-120mm, and the initial included angle is... Preferably, the angle is 60°-75°. Using the nonlinear displacement transfer function determined above, at the end of the clamping action (i.e.... As the vertical displacement decreases, the rate of change of horizontal displacement generated by the vertical displacement decreases, thereby achieving a flexible clamping effect that is fast at first and then slows down, effectively preventing the emulsion explosive from becoming sensitized or even causing a safety accident under instantaneous strong impact.

[0060] Considering the high safety standards of the emulsion explosive processing environment, the components that come into direct or indirect contact with the small explosive cartridge (such as the mounting base 4, the movable base 7, the limiting ring 10, and the limiting clamping ring 808) in this invention are all made of 316L stainless steel or polyoxymethylene (POM) material with a special antistatic coating. The surface resistivity is strictly controlled between 10^6Ω and 10^9Ω to prevent static electricity accumulation.

[0061] Meanwhile, the multiple cylinders 2 that drive the movable plate 3 to rise and fall are all explosion-proof cylinders, and the four corners of the bottom of the base 1 are equipped with grounding terminals (grounding resistance less than 4Ω). In order to prevent the cylinder 2 from being overloaded and causing the medicine roll to be squeezed and broken, a precision pressure reducing valve is provided on the air supply circuit of the cylinder 2, and a maximum thrust threshold is set. When the resistance exceeds the threshold, it will automatically release pressure and trigger an audible and visual alarm.

[0062] To ensure the absolute stability of the matrix packaging module under high-speed operation and vibration environments, the limit spring 605 is made of piano wire with high fatigue strength, and its spring stiffness coefficient k is set to 4.5N / mm to 6.5N / mm. When the locking rod 601 is in the natural release state, the preload provided by the limit spring 605 ensures that the depth of the positioning rods 602 on both sides embedded in the insertion slot and insertion hole is not less than 15mm. This mechanical deadlock structure can resist the vertical shear vibration force of more than 500N generated when the moving plate 3 moves up and down, ensuring that the positional offset of the multi-row limit rings 10 after combination is less than 0.2mm.

[0063] By utilizing the relative displacement difference between the descending movable seat 7 and the stationary limiting ring 10, this displacement is mechanically converted into radial clamping power for the limiting clamping ring 808 via a linkage mechanism. This allows a single lifting power source to simultaneously complete both the downward movement and automatic clamping of the explosive cartridge. This design not only completely eliminates the need for a separate power source and complex control system for the grippers, greatly simplifying the equipment structure, but also ensures that each explosive cartridge is automatically aligned and securely locked before vacuuming, significantly improving the quality consistency and airtightness of batch packaging. Furthermore, the cooperation of the threaded sleeve rod 804 and the threaded adjusting rod 805 allows for flexible fine-tuning of the clamping mechanism before assembly to accommodate explosive cartridges of different diameters, greatly enhancing the equipment's applicability and production flexibility. This solves the problem that traditional small emulsion explosive cartridges, lacking a synchronous and adaptive clamping structure, are prone to tilting and shifting under vacuum suction or sealing action during batch vacuum packaging, leading to packaging bag wrinkles, incomplete sealing, and low yield.

[0064] To achieve rapid vacuuming, this application also introduces a vacuuming component 9. Specifically, the vacuuming component 9 mainly includes a vacuum three-way valve 901, which is installed in the middle of the movable seat 7 by means of embedding. The input end of the vacuum three-way valve 901 is located in the middle of the top surface of the movable seat 7, directly corresponding to the position directly below the small medicine roll above the movable seat 7. At the same time, vacuum suction tubes 902 are installed on both sides of the vacuum three-way valve 901, and the vacuum suction tubes 902 penetrate one side of the movable seat 7. A main three-way valve 903 is provided at the relatively close end of the two vacuum suction tubes 902. The two sides of the main three-way valve 903 are connected to the vacuum suction tubes 902. At the same time, the top end of the main three-way valve 903, i.e., the output end, is connected to an external negative pressure pump.

[0065] In order to press the top of the small pill roll under negative pressure and assist in the vacuuming operation, a threaded adjusting rod 904 is installed at the bottom of the main three-way valve 903, and an abutment seat 905 is installed at the bottom of the threaded adjusting rod 904.

[0066] Furthermore, the length of the threaded adjustment rod 904 can be adjusted according to the size of the small pill roll. The adjusted length should meet the requirement that when the self-limiting component 8 just clamps the side of the small pill roll, the bottom end of the abutment seat 905 just contacts the vacuum packaging bag at the top of the small pill roll and maintains the pressing process.

[0067] Example: After the small pill roll is placed on the movable seat 7 and a vacuum packaging bag is placed on it, the cylinder 2 drives the movable plate 3 and the movable seat 7 to move downwards synchronously. At the same time, since the length of the threaded adjusting rod 904 has been pre-adjusted according to the height of the small pill roll, when the limiting clamping ring 808 just completes the clamping and positioning of the side of the small pill roll, the abutment seat 905 at the bottom of the threaded adjusting rod 904 just contacts the vacuum packaging bag at the top of the small pill roll and maintains a compressed state. In this state, the external negative pressure pump is started, pressing the abutment seat 905 downwards. With the assistance of the vacuum valve 901 located directly below the small pill roll and embedded in the middle of the movable seat 7, the air inside the packaging bag is physically squeezed downwards and smoothly extracted, completing the vacuuming operation. Then, it is heat-sealed in conjunction with the external conventional sealing mechanism. When discharging, the controller controls the cylinder 2 to move in the opposite direction, driving the movable plate 3 and the movable seat 7 to move upwards and reset. The self-limiting component 8 is linked in the opposite direction to open the limiting clamp 808 and release the pill roll. The abutment seat 905 also disengages simultaneously. The sealed small pill roll can then be removed to complete the entire discharging process.

[0068] In operation, a high-precision digital negative pressure sensor and an electromagnetic vacuum breaker valve are connected in series on the external negative pressure pump's suction line. When the abutment seat 905 at the bottom of the threaded adjusting rod 904 contacts the top of the small pill cartridge, the controller receives a height completion signal and activates the main three-way valve 903. The working negative pressure range for vacuum suction is set to -0.08MPa to -0.095MPa. While the abutment seat 905 applies a constant pressing force downwards, the vacuum system continuously pumps air for 1.5s-2.5s. When the negative pressure sensor detects that the vacuum level inside the vacuum three-way valve 901 reaches -0.09MPa and remains stable for 0.5s, the controller determines that the vacuum has been achieved and immediately issues a command to close the main three-way valve 903, triggering the external heat-sealing mechanism. The heat-sealing temperature is controlled between 180°C and 220°C, and the heat-sealing time is 0.8s-1.2s.

[0069] The inner side of the limiting clamping ring 808 is provided with several vertically penetrating air guiding and anti-slip grooves. When the limiting clamping ring 808 clamps the vacuum packaging bag of the medicine roll side wall, the air guiding and anti-slip grooves form an exhaust channel from top to bottom on the clamping surface, so that the air at the top of the packaging bag that is squeezed downward by the abutment seat 905 can pass smoothly through the clamping area and be extracted by the vacuum three-way valve 901 at the bottom.

[0070] By utilizing the relative displacement difference between the descending movable seat 7 and the stationary limit ring 10, combined with the linkage mechanism and the threaded adjusting rod 904, the automatic clamping of the side of the explosive cartridge and the physical pressing of the top of the explosive cartridge are realized simultaneously within the lifting stroke of a cylinder 2. This top pressing structure can assist in squeezing the air in the packaging bag downwards during vacuuming. In conjunction with the vacuum three-way valve 901 at the bottom, it improves the exhaust rate and vacuuming effect. At the same time, the pressing force smooths out the wrinkles in the top area of ​​the packaging bag, which is conducive to improving the flatness and airtightness of the subsequent sealing. It reduces the number of independent actuators in the equipment and solves the problems of traditional vacuum sealing equipment for small emulsion explosive cartridges, which lack a synchronous pressing structure, resulting in air residue and wrinkles at the top of the packaging bag, thus affecting the sealing quality, as well as the complex structure of the equipment due to the independent action of each functional component.

[0071] Working principle and usage process of this invention:

[0072] Before processing the emulsion explosive cartridges, first rotate the threaded sleeve 804 to adjust its relative extension and retraction with the threaded adjusting rod 805, and fine-tune the initial distance between the first fixed seat 801 and the second fixed seat 802 so that the limiting clamping ring 808 can adapt to the outer diameter of the current cartridge. Simultaneously rotate the threaded adjusting rod 904 below the main three-way valve 903 to adjust its extension length to adapt to the height of the cartridge. After preparation, use the locking block at the top of the limiting ring 10 to connect the end of the slot to form a single row. Insert the synchronous insertion rod 5 through the guide ear plate 12 at the bottom of the movable seat 7 and lock it in place. Fix it to the external frame. Then, pull the locking rod 601 to compress the limiting spring 605 and push the insertion plate on the guide ear plate 12 in the middle of the assembled single row module into the insertion slot of the locking sleeve 604. After the hole is aligned, release the locking rod 601 and insert the positioning rod 602 into the insertion hole to complete the locking. Repeat this step to assemble multiple rows to form a complete encapsulation array.

[0073] During operation, the small medicine rolls, which are covered with vacuum packaging bags, are placed directly above the vacuum three-way valve 901 on the movable seat 7. The controller drives the cylinder 2 to descend, which in turn drives the movable plate 3 and the movable seat 7 to move downwards synchronously. Since the limit ring 10 keeps the height constant, the descent of the movable seat 7 pulls the first fixed seat 801 of the limit assembly 8, which pushes the second fixed seat 802 and the limit plate 806 to move inwards through the connecting rod 803, so that the limit rod 807 slides in the through hole 11, driving the limit clamping rings 808 on both sides to move closer to the small medicine rolls and firmly clamp the side walls of the medicine rolls.

[0074] While the limiting clamping ring 808 clamps the medicine roll, the abutment seat 905 at the bottom of the threaded adjusting rod 904 contacts the top of the packaging bag of the small medicine roll and keeps it pressed, smoothing out the top wrinkles. At this time, the external negative pressure pump starts. Under the combined action of the downward pressing of the abutment seat 905 and the negative pressure suction of the bottom vacuum three-way valve 901, the air inside the packaging bag is drawn downward. After the negative pressure reaches the standard, the system closes the main three-way valve 903, and the external mechanism heat-seals the top of the flat packaging bag. After the sealing is completed, the cylinder 2 extends in the opposite direction, driving the movable plate 3 and the movable seat 7 to move upward and reset. The limiting component 8 reverses and causes the limiting clamping ring 808 to open, and the abutment seat 905 disengages. The finished medicine roll can then be removed to complete the vacuum sealing cycle.

Claims

1. A vacuum packaging machine for small cartridges of emulsion explosives, comprising a base (1), a movable plate (3) disposed above the base (1) and driven to rise and fall by a cylinder (2), and a mounting seat (4) disposed above the movable plate (3), wherein a movable seat (7) for carrying small cartridges is disposed above the mounting seat (4), characterized in that: It also includes a limiting ring (10) that is fixed in position and does not rise or fall with the movable plate (3). The limiting ring (10) is located above the movable seat (7) and has through holes (11) on both sides. The bottom end of the limiting ring (10) is connected to the movable seat (7) by a self-limiting component (8). The self-limiting component (8) includes a first fixed seat (801) installed on the movable seat (7), a second fixed seat (802) located obliquely above the first fixed seat (801), and a connecting rod (803) hinged between the first fixed seat (801) and the second fixed seat (802). A limiting rod (807) is connected above the second fixed seat (802). The limiting rod (807) slides through the through hole (11) and its end is connected to a limiting clamping ring (808) located inside the limiting ring (10). As the movable seat (7) descends with the movable plate (3), the vertical relative displacement between the movable seat (7) and the limiting ring (10) pulls the connecting rod (803) to deflect and converts the vertical downward pulling force into a horizontal thrust, so as to force the limiting rod (807) to slide inward along the through hole (11), thereby driving the limiting clamping rings (808) on both sides to move towards the center synchronously and clamp and lock the small pill.

2. The vacuum packaging machine for small cartridges of emulsion explosives according to claim 1, characterized in that: A limiting plate (806) is provided above the second fixed seat (802), and the limiting rod (807) is installed on the corresponding limiting plate (806); The bottom end of the limiting plate (806) is rotatably connected to a threaded sleeve rod (804), and the top end of the second fixed seat (802) is equipped with a threaded adjusting rod (805) that cooperates with the threaded sleeve rod (804), which is used to adjust the initial clamping distance of the limiting clamping ring (808) before assembly to adapt to drug rolls of different diameters.

3. The vacuum packaging machine for small cartridges of emulsion explosives according to claim 2, characterized in that: The inner side of the limiting clamp (808) is provided with an anti-slip groove to increase the clamping friction.

4. The vacuum packaging machine for small cartridges of emulsion explosives according to claim 1, characterized in that: Multiple limiting rings (10) constitute a matrix packaging array, wherein adjacent limiting rings (10) are connected end-to-end by a card block on one side and a card slot on the other side to form a single row of limiting ring groups; A guide ear plate (12) is installed at the bottom center of the movable seat (7). Multiple guide ear plates (12) corresponding to the same single row limit ring group are connected to a synchronous plug rod (5) through and movable.

5. The vacuum packaging machine for small cartridges of emulsion explosives according to claim 4, characterized in that: A locking component (6) is installed at the middle position between each pair of adjacent mounting bases (4), and plug-in plates that are plugged into and cooperate with the locking component (6) are installed on both the front and rear sides of the guide ear plate (12) located at the middle of the row.

6. The vacuum packaging machine for small cartridges of emulsion explosives according to claim 5, characterized in that: The locking assembly (6) includes a locking sleeve (604) fixed between adjacent mounting bases (4), and the locking sleeve (604) has insertion slots on both sides for the insertion plate to be inserted. A locking lever (601) is movably sleeved through the middle of the locking sleeve (604). A positioning plate (603) is connected to the locking lever (601). Positioning rods (602) for passing through the insertion slot and the insertion plate are installed on both sides of the inner side of the positioning plate (603).

7. The vacuum packaging machine for small cartridges of emulsion explosives according to claim 6, characterized in that: One side of the plug plate and one side of the plug slot are provided with corresponding plug holes; the outer side of the locking lever (601) is movably sleeved with a limit spring (605), and the two sides of the limit spring (605) abut against the positioning plate (603) and the locking sleeve (604) respectively. It is configured to release the preload when the plug holes are aligned with each other to drive the positioning rods (602) on both sides to elastically insert into the plug holes to form a dead lock.

8. The vacuum packaging machine for small cartridges of emulsion explosives according to claim 1, characterized in that: It also includes a vacuum assembly (9), which includes a vacuum three-way valve (901) installed in the middle of the movable seat (7) and located directly below the small pill. Vacuum suction tubes (902) extending upward and penetrating the movable seat (7) are connected to both sides of the vacuum three-way valve (901). A main three-way valve (903) is connected between the relatively close top ends of the two vacuum suction tubes (902). The output end of the main three-way valve (903) is used to connect to an external negative pressure pump.

9. The vacuum packaging machine for small cartridges of emulsion explosives according to claim 8, characterized in that: The bottom end of the main three-way valve (903) is connected to a threaded adjusting rod (904), and the bottom end of the threaded adjusting rod (904) is equipped with an abutment seat (905) for abutting against the top vacuum packaging bag of the small medicine roll.

10. The vacuum packaging machine for small cartridges of emulsion explosives according to claim 9, characterized in that: The extension length of the threaded adjusting rod (904) is spatially matched with the movement stroke of the self-limiting component (8); The configuration is such that when the limiting clamping ring (808) just completes the clamping and positioning of the side of the small pill roll, the bottom end of the abutment seat (905) moves down with the movable seat (7) and just contacts the vacuum packaging bag at the top of the small pill roll and keeps it in a compressed state, so as to help guide the residual air inside the packaging bag downward and extract it from the vacuum three-way valve (901) at the bottom.

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