Automatic capping mechanism for barrel fireproof paint

Abstract

The application discloses a barrel type fireproof coating automatic capping mechanism and relates to the technical field of fireproof coating production. The barrel type fireproof coating automatic capping mechanism comprises a workbench, a barrel roller way, a feeding roller, an adjustable support, a fixing base, a jacking mechanism, a positioning and capping mechanism and a driving mechanism. The positioning and capping mechanism is arranged below the fixing base in a liftable mode and is provided with a positioning station and a rotating capping station. When the positioning station is used, the positioning and capping mechanism is lowered to be attached to the barrel cap at the barrel opening of the coating barrel, so that the coating barrel is coaxially positioned with the positioning and capping mechanism. When the rotating capping station is used, the positioning and capping mechanism is rotated, and the capping sheet on the barrel cap is pressed against the barrel opening of the coating barrel. The barrel, the barrel cap and the capping sheet are coaxially positioned through the positioning and capping mechanism. The capping sheet can be extruded from top to bottom and then be rotated and extruded. The capping sheet can be uniformly pressed against the barrel opening, the attachment compactness is improved, and the capping effect is improved.

Description

Technical Field

[0001] This invention relates to the field of fire-retardant coating production equipment technology, and more specifically, to an automatic capping mechanism for barrel-packaged fire-retardant coatings. Background Technology

[0002] Fire-retardant coatings are functional coatings applied to the surface of combustible substrates to reduce the flammability of the coated material and inhibit the rapid spread of fire. During the production process, fire-retardant coatings typically require the finished coating to be filled into containers and sealed.

[0003] Existing capping equipment cannot guarantee coaxiality between the paint bucket, lid, and capping equipment during use. Misalignment of the paint bucket or lid can lead to poor sealing and affect the sealing performance of the product. When pressing the capping sheet, only one pressing operation can be performed on the capping sheet on the lid, which can easily result in insufficient tightness between the capping sheet and the flange of the bucket opening, resulting in poor capping effect. Summary of the Invention

[0004] To address the above deficiencies, this invention provides an automatic capping mechanism for barrel-packaged fire-retardant coatings, thus solving the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An automatic capping mechanism for barrel-packaged fire-retardant coating includes: Workbench; A material bucket roller conveyor is installed on the surface of the workbench. The material bucket roller conveyor includes several feeding rollers for conveying paint buckets. Adjustable brackets are installed on both sides of the workbench. The material barrel roller conveyor is provided with a sealing area along its conveying direction. The adjustable brackets are located on both sides of the sealing area. Fixed seats that span over the sealing area are connected to the adjustable brackets on both sides. The fixed seats are located directly above the sealing area. The lifting mechanism, located on the workbench and in the sealing area, is used to lift the paint bucket off the feed roller; The positioning and sealing mechanism is vertically mounted below the fixed base and has a positioning station and a rotating sealing station. In the positioning station, the positioning and sealing mechanism descends and fits against the lid at the mouth of the paint bucket, thereby positioning the paint bucket and the positioning and sealing mechanism coaxially. In the rotating sealing station, the positioning and sealing mechanism rotates, causing the sealing plate on the lid to press tightly against the mouth of the paint bucket. The drive mechanism is connected to the positioning and sealing mechanism, and drives the positioning and sealing mechanism to lift, rotate and move.

[0006] Furthermore, the lifting mechanism includes a linear drive element installed in the workbench, a lifting support plate is provided below the material barrel roller conveyor and on the surface of the workbench, the output end of the linear drive element is fixedly connected to the lifting support plate, a lifting plate is provided between two adjacent feeding rollers, the lifting plate is fixedly connected to the lifting support plate through a support member, the support member is located between two adjacent feeding rollers, and a plurality of first universal ball bearings are installed on the surface of the lifting plate.

[0007] Furthermore, the highest point of the steel ball of the first universal ball is lower than the top surface of the feeding roller.

[0008] Furthermore, the positioning and sealing mechanism includes a rotating disk and a central column fixed at the bottom center of the rotating disk. A lifting ring is slidably sleeved on the central column along the axial direction. A spring connects the lifting ring and the rotating disk. A pressure plate is fixedly connected to the bottom of the central column. Protrusions are fixedly connected around the pressure plate. A pull rod is connected to the protrusions through a hinge shaft. A pull block is fixedly connected to the inner side of the bottom end of the pull rod. Multiple second universal ball bearings are installed on the pull block. A guide slide rod is fixedly connected around the lifting ring. A guide slide groove is opened on the guide slide rod. The top end of the pull rod slides in cooperation with the guide slide groove through a rotating shaft. Several push rods are slidably connected through the pressure plate. The top end of the push rod is fixedly connected to the lifting ring. A third universal ball bearing is installed at the bottom end of the push rod. In the spring's natural state, the bottom end of the push rod extends beyond the lower surface of the pressure plate, allowing the third universal ball bearing to contact the lid before the pressure plate when the positioning and sealing mechanism descends. As the third universal ball bearing continues to descend after contacting the lid, the lid pushes the push rod upward, causing the push rod to slide along the central column. The lifting ring drives the pull rod to swing around the hinge axis via the guide groove of the guide slide rod, causing the pull block to retract towards the center to grip the edge of the lid, thus achieving coaxial positioning of the positioning and sealing mechanism and the lid.

[0009] Furthermore, the bottom of the pressure plate is provided with a pressing ring and a circular guide groove. The pressing ring is located below the circular guide groove and is connected to the circular guide groove through a connector. The pressing ring can rotate freely in the circumferential direction relative to the pressure plate.

[0010] Furthermore, the springs are arranged in a plurality of them and are evenly distributed around the central column on the surface of the lifting ring. The top end of the spring is connected to the rotating disk, and the bottom end of the spring is connected to the lifting ring.

[0011] Furthermore, the driving mechanism includes a hydraulic cylinder mounted on a fixed base. A motor base is mounted on the output end of the hydraulic cylinder, and a drive motor is mounted on the motor base. The output end of the drive motor is fixedly connected to the rotating disk of the positioning and sealing mechanism. The hydraulic cylinder is used to drive the overall lifting and lowering of the positioning and sealing mechanism, and the drive motor is used to drive the rotating disk to rotate.

[0012] Furthermore, the protrusions, pull rods, and pull blocks are provided in a plurality of numbers and are evenly distributed around the outer axis of the pressure plate, and the number of guide slide rods is the same as the number of pull rods.

[0013] Furthermore, the pull block is provided with at least three second universal ball bearings, and the distance between two adjacent pull blocks is less than the distance between adjacent sealing plates of the bucket lid.

[0014] The beneficial effects of this invention are: 1. By setting up a lifting mechanism, the lifting plate and the lifting support plate are driven by linear drive elements to lift the paint bucket from the material bucket roller conveyor, so that the paint bucket is separated from the feeding roller. When positioning the paint bucket, the feeding roller is prevented from interfering with the bottom of the bucket, the friction of the paint bucket movement is reduced, and it is easy to make small displacement adjustments. 2. By setting up a positioning and sealing mechanism, the third universal ball bearings are used to make priority contact with the lid. During the descent, the push rod, lifting ring, guide slide and pull rod work together to make the pull block automatically retract to the center and hold the edge of the lid. This achieves coaxial positioning of the positioning and sealing mechanism with the paint bucket and lid. No manual adjustment of the centering is required, which greatly improves the centering accuracy and work efficiency. 3. The capping sheet is pressed from top to bottom by the second universal ball bearing on the pull block, and then the second universal ball bearing rotates along the capping sheet to press it. The second universal ball bearing reduces friction and improves the smoothness of the capping process. It can make the capping sheet evenly pressed against the mouth of the bucket, improve the tightness of the fit, and improve the capping effect. Attached Figure Description

[0015] Figure 1 This is a front sectional view of the present invention; Figure 2 This is a side sectional view of the present invention; Figure 3 yes Figure 1 A magnified view of a section at point A in the middle; Figure 4 This is an enlarged sectional view of the positioning and sealing mechanism; Figure 5 This is an enlarged bottom view of the lifting ring; Figure 6 This is an enlarged bottom view of the pressure plate; Figure 7 This is a diagram showing the connection state between the pressing ring and the pressure plate; In the diagram: 1. Workbench; 2. Material bucket roller conveyor; 3. Feeding roller; 4. Adjustable bracket; 5. Fixed base; 6. Lifting mechanism; 601. Linear drive element; 602. Lifting support plate; 603. Lifting plate; 604. Support component; 605. First universal ball bearing; 7. Positioning and sealing mechanism; 701. Rotary disk; 702. Central column; 703. Lifting ring; 704. Spring; 705. Pressure plate; 706. Protrusion block; 707. Pull rod; 708. Pull block; 709. Second universal ball bearing; 710. Guide slide rod; 711. Guide slide groove; 712. Rotating shaft; 713. Push rod; 714. Third universal ball bearing; 8. Drive mechanism; 801. Hydraulic cylinder; 802. Motor base; 803. Drive motor; 9. Pressing ring; 10. Circular guide groove; 11. Connecting component. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] This application provides an automatic capping mechanism for barrel-packaged fire-retardant coatings. Please refer to [link / reference]. Figures 1-7 Includes workbench 1; The material bucket roller conveyor 2 is installed on the surface of the workbench 1. The material bucket roller conveyor 2 includes several feeding rollers 3 for conveying paint buckets. Adjustable brackets 4 are installed on both sides of the workbench 1. The material barrel roller conveyor 2 has a sealing area along its conveying direction. The adjustable brackets 4 are located on both sides of the sealing area. Fixed seats 5 are connected to the adjustable brackets 4 on both sides, spanning above the sealing area. The fixed seats 5 are located directly above the sealing area. The lifting mechanism 6 is set on the workbench 1 and located in the sealing area, and is used to lift the paint bucket off the feeding roller 3. The positioning and capping mechanism 7 is vertically mounted below the fixed base 5 and has a positioning station and a rotating capping station. In the positioning station, the positioning and capping mechanism 7 descends and fits against the cap at the mouth of the paint bucket, thereby positioning the paint bucket and the positioning and capping mechanism 7 coaxially. In the rotating capping station, the positioning and capping mechanism 7 rotates, causing the capping piece on the cap to press tightly against the mouth of the paint bucket. The drive mechanism 8 is connected to the positioning and sealing mechanism 7, and drives the positioning and sealing mechanism 7 to lift and rotate.

[0018] In practical applications, the material bucket roller conveyor 2 is installed on the surface of the workbench 1 and includes several feeding rollers 3. The feeding rollers 3 feed the paint bucket into the sealing area along the conveying direction.

[0019] The paint bucket is lifted from the feeding roller 3 of the paint bucket roller conveyor 2 by the lifting mechanism 6, so that the bottom of the paint bucket is separated from the feeding roller 3 and the bottom of the paint bucket is in close contact with the lifting mechanism 6. The lifting mechanism 6 reduces the friction on the paint bucket, making it easier to make small displacement adjustments.

[0020] The positioning and capping mechanism 7 is driven to descend as a whole by the drive mechanism 8. The positioning and capping mechanism 7 first positions the paint bucket and the lid coaxially. After the positioning is completed, the drive mechanism 8 drives the positioning and capping mechanism 7 to rotate to perform the capping operation.

[0021] Refer to the instruction manual appendix Figure 1 Instruction manual attached Figure 2 Included with instruction manual Figure 3 The lifting mechanism 6 includes a linear drive element 601 installed in the workbench 1. A lifting support plate 602 is provided below the material barrel roller conveyor 2 and on the surface of the workbench 1. The output end of the linear drive element 601 is fixedly connected to the lifting support plate 602. A lifting plate 603 is provided between two adjacent feeding rollers 3. The lifting plate 603 is fixedly connected to the lifting support plate 602 through a support member 604. The support member 604 is located between two adjacent feeding rollers 3. Several first universal balls 605 are installed on the surface of the lifting plate 603. The highest point of the steel ball of the first universal ball 605 is lower than the top surface of the feeding roller 3.

[0022] In practical applications, the paint bucket is conveyed to the sealing area via the material bucket roller conveyor 2. A lid is placed on the paint bucket, and the linear drive element 601 starts to work. The linear drive element 601 drives the lifting plate 602 to rise. The lifting plate 602 drives the lifting plate 603 to rise through the support member 604. The first universal ball bearing 605 on the lifting plate 603 lifts the paint bucket and disengages it from the feeding roller 3. The first universal ball bearing 605 reduces the friction on the paint bucket, making it easier to make small displacement adjustments to the paint bucket.

[0023] Refer to the instruction manual appendix Figure 4 Instruction manual attached Figure 5 Included with instruction manual Figure 6The positioning and sealing mechanism 7 includes a rotating disk 701 and a central column 702 fixed at the bottom center of the rotating disk 701. A lifting ring 703 is slidably sleeved on the central column 702 along the axial direction. A spring 704 connects the lifting ring 703 and the rotating disk 701. A pressure plate 705 is fixedly connected to the bottom of the central column 702. Protrusions 706 are fixedly connected around the pressure plate 705. A pull rod 707 is connected to the protrusions 706 through a hinge shaft. A pull block is fixedly connected to the inner side of the bottom end of the pull rod 707. 708, multiple second universal ball bearings 709 are installed on the pull block 708, and guide slide rods 710 are fixedly connected around the lifting ring 703. Guide slide rods 710 are provided with guide slide grooves 711. The top end of the pull rod 707 is slidably engaged with the guide slide grooves 711 through the rotating shaft 712. Several push rods 713 are slidably connected through the pressure plate 705. The top end of the push rods 713 is fixedly connected to the lifting ring 703, and the bottom end of the push rods 713 is equipped with third universal ball bearings 714. In the natural state of the spring 704, the bottom end of the push rod 713 extends out of the lower surface of the pressure plate 705, so that the third universal ball 714 contacts the lid before the pressure plate 705 when the positioning and sealing mechanism 7 descends. When the third universal ball 714 continues to descend after contacting the lid, the lid pushes the push rod 713 upward, and the push rod 713 drives the lifting ring 703 to slide upward along the central column 702. The lifting ring 703 drives the pull rod 707 to swing around the hinge axis through the guide groove 711 of the guide slide rod 710, so that the pull block 708 retracts towards the center to hold the edge of the lid, thereby achieving coaxial positioning of the positioning and sealing mechanism 7 and the lid.

[0024] In practical applications, after the paint bucket is lifted, the drive mechanism 8 drives the positioning and sealing mechanism 7 to descend as a whole. The third universal ball bearing 714 first contacts the top surface of the lid. As it continues to descend, the lid pushes the push rod 713 upward. The push rod 713 drives the lifting ring 703 to move upward along the central column 702. The lifting ring 703 compresses the spring 704. During the upward movement of the lifting ring 703, the guide groove 711 on the guide slide rod 710 drives the pull rod 707 to swing inward around the hinge axis, causing the pull block 708 to retract towards the center. The second universal ball bearing 709 on the pull block 708 adheres to and hugs the edge of the lid, allowing the paint bucket to be displaced and adjusted on the first universal ball bearing 605, so that the paint bucket, lid, and positioning and sealing mechanism 7 are coaxially positioned. After positioning is completed, the lifting mechanism 6 resets so that the paint bucket falls onto the feeding roller 3; The drive mechanism 8 drives the rotating disk 701 to rotate. The rotating disk 701 drives the pressure plate 705 and the pull block 708 to rotate through the central column 702, so that the sealing plates around the barrel lid fit tightly with the barrel opening flange, which improves the tightness of the fit between the sealing plates and the barrel opening flange and improves the sealing effect.

[0025] Refer to the instruction manual appendix Figure 4 Instruction manual attached Figure 6 Included with instruction manual Figure 7 The bottom of the pressure plate 705 is provided with a pressing ring 9 and a circular guide groove 10. The pressing ring 9 is located below the circular guide groove 10. The pressing ring 9 is connected to the circular guide groove 10 through a connector 11. The pressing ring 9 can rotate freely in the circumferential direction relative to the pressure plate 705.

[0026] In practical applications, after the positioning and lifting mechanism 6 is reset, the positioning and sealing mechanism 7 will continue to descend, causing the second universal ball bearing 709 on the pull block 708 to press the sealing plate from top to bottom, which improves and reduces friction and improves the sealing effect. The pressing ring 9 contacts the surface of the lid, providing uniform downward pressure. Since the pressing ring 9 can rotate relative to the pressure plate 705, it can apply downward pressure to the paint bucket, preventing the paint bucket from rotating when the positioning and sealing mechanism 7 rotates.

[0027] Refer to the instruction manual appendix Figure 1 Included with instruction manual Figure 2 The drive mechanism 8 includes a hydraulic cylinder 801 mounted on the fixed base 5. A motor base 802 is mounted on the output end of the hydraulic cylinder 801. A drive motor 803 is mounted on the motor base 802. The output end of the drive motor 803 is fixedly connected to the rotating disk 701 of the positioning and sealing mechanism 7. The hydraulic cylinder 801 is used to drive the positioning and sealing mechanism 7 to lift and lower as a whole, and the drive motor 803 is used to drive the rotating disk 701 to rotate.

[0028] In practical applications, the positioning and sealing mechanism 7 is lifted and lowered by the hydraulic cylinder 801, and the rotating disk 701 is rotated by the drive motor 803.

[0029] Refer to the instruction manual appendix Figure 6 The protrusions 706, pull rods 707 and pull blocks 708 are provided in several quantities and are evenly distributed around the outer axis of the pressure plate 705. The number of guide slide rods 710 is the same as the number of pull rods 707. The pull block 708 is provided with at least three second universal ball bearings 709. The distance between two adjacent pull blocks 708 is less than the distance between adjacent sealing plates of the bucket lid.

[0030] In practical applications, when the pull block 708 descends and rotates to contact the sealing plate of the bucket lid, misalignment is avoided. The second universal ball bearing 709 on the pull block 708 can always fit the sealing plate.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. An automatic capping mechanism for barrel-packaged fire-retardant coating, characterized in that, include: Workbench (1); The material bucket roller conveyor (2) is installed on the surface of the workbench (1). The material bucket roller conveyor (2) includes several feeding rollers (3) for conveying paint buckets. Adjustable brackets (4) are installed on both sides of the workbench (1). The material barrel roller conveyor (2) is provided with a sealing area along its conveying direction. The adjustable brackets (4) are located on both sides of the sealing area. Fixed seats (5) that span the sealing area are connected to the adjustable brackets (4) on both sides. The fixed seats (5) are located directly above the sealing area. The lifting mechanism (6) is set on the workbench (1) and located in the sealing area, and is used to lift the paint bucket off the feed roller (3); The positioning and sealing mechanism (7) is vertically mounted below the fixed base (5) and has a positioning station and a rotating sealing station. In the positioning station, the positioning and sealing mechanism (7) descends and fits against the lid at the mouth of the paint bucket, thereby positioning the paint bucket and the positioning and sealing mechanism (7) coaxially. In the rotating sealing station, the positioning and sealing mechanism (7) rotates, so that the sealing piece on the lid is pressed against the mouth of the paint bucket. The drive mechanism (8) is connected to the positioning and sealing mechanism (7) to drive the positioning and sealing mechanism (7) to lift and rotate.

2. The automatic capping mechanism for barrel-packaged fire-retardant coating according to claim 1, characterized in that, The lifting mechanism (6) includes a linear drive element (601) installed in the workbench (1), a lifting support plate (602) is provided below the material drum roller conveyor (2) and on the surface of the workbench (1), the output end of the linear drive element (601) is fixedly connected to the lifting support plate (602), a lifting plate (603) is provided between two adjacent feeding rollers (3), the lifting plate (603) is fixedly connected to the lifting support plate (602) through a support member (604), the support member (604) is located between two adjacent feeding rollers (3), and a plurality of first universal ball bearings (605) are installed on the surface of the lifting plate (603).

3. The automatic capping mechanism for barrel-packaged fire-retardant coating according to claim 2, characterized in that, The highest point of the steel ball of the first universal ball (605) is lower than the top surface of the feed roller (3).

4. The automatic capping mechanism for barrel-packaged fire-retardant coating according to claim 1, characterized in that, The positioning and sealing mechanism (7) includes a rotating disk (701) and a central column (702) fixed at the bottom center of the rotating disk (701). A lifting ring (703) is slidably sleeved on the central column (702) along the axial direction. A spring (704) connects the lifting ring (703) and the rotating disk (701). A pressure plate (705) is fixedly connected to the bottom of the central column (702). A protrusion (706) is fixedly connected around the pressure plate (705). A pull rod (707) is connected to the protrusion (706) through a hinge shaft. A pull rod (707) is fixedly connected to the inner side of the bottom end of the pull rod (707). Block (708), pull block (708) is equipped with multiple second universal ball bearings (709), lifting ring (703) is fixedly connected with guide slide rods (710) around its perimeter, guide slide rods (710) are provided with guide slide grooves (711), the top end of pull rod (707) is slidably engaged with guide slide grooves (711) through rotating shaft (712), pressure plate (705) is slidably connected with several push rods (713), the top end of push rods (713) is fixedly connected with lifting ring (703), and the bottom end of push rods (713) is equipped with third universal ball bearings (714); When the spring (704) is in its natural state, the bottom end of the push rod (713) extends out of the lower surface of the pressure plate (705) so that the third universal ball (714) contacts the bucket lid before the pressure plate (705) when the positioning and sealing mechanism (7) descends; when the third universal ball (714) continues to descend after contacting the bucket lid, the bucket lid pushes the push rod (713) upward, and the push rod (713) drives the lifting ring (703) to slide upward along the central column (702). The lifting ring (703) drives the pull rod (707) to swing around the hinge axis through the guide groove (711) of the guide slide rod (710), so that the pull block (708) retracts towards the center to hug the edge of the bucket lid, thereby realizing the coaxial positioning of the positioning and sealing mechanism (7) and the bucket lid.

5. The automatic capping mechanism for barrel-packaged fire-retardant coating according to claim 4, characterized in that, The bottom of the pressure plate (705) is provided with a pressing ring (9) and a circular guide groove (10). The pressing ring (9) is located below the circular guide groove (10). The pressing ring (9) is connected to the circular guide groove (10) through a connector (11). The pressing ring (9) can rotate freely in the circumferential direction relative to the pressure plate (705).

6. The automatic capping mechanism for barrel-packaged fire-retardant coating according to claim 4, characterized in that, The springs (704) are arranged in a plurality of them and are evenly distributed around the central column (702) on the surface of the lifting ring (703). The top end of the springs (704) is connected to the rotating disk (701), and the bottom end of the springs (704) is connected to the lifting ring (703).

7. The automatic capping mechanism for barrel-packaged fire-retardant coating according to claim 1, characterized in that, The drive mechanism (8) includes a hydraulic cylinder (801) mounted on a fixed base (5). A motor base (802) is mounted on the output end of the hydraulic cylinder (801). A drive motor (803) is mounted on the motor base (802). The output end of the drive motor (803) is fixedly connected to the rotating disk (701) of the positioning and sealing mechanism (7). The hydraulic cylinder (801) is used to drive the positioning and sealing mechanism (7) to lift as a whole, and the drive motor (803) is used to drive the rotating disk (701) to rotate.

8. The automatic capping mechanism for barrel-packaged fire-retardant coating according to claim 4, characterized in that, The protrusions (706), pull rods (707) and pull blocks (708) are provided in a plurality of numbers and are evenly distributed around the outer axis of the pressure plate (705). The number of guide slide rods (710) is the same as the number of pull rods (707).

9. The automatic capping mechanism for barrel-packaged fire-retardant coating according to claim 4, characterized in that, The pull block (708) is provided with at least three second universal ball bearings (709), and the distance between two adjacent pull blocks (708) is less than the distance between adjacent sealing plates of the bucket lid.

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