Filter screen replacement equipment for film blowing machine

Abstract

The invention relates to film blowing machine filter screen replacement equipment, and belongs to the field of film blowing machines, the film blowing machine filter screen replacement equipment comprises a first fixing block, a first electric push rod and a rotating plate are mounted on the first fixing block, a connecting cylinder is fixedly arranged above the rotating plate, and a second electric push rod is mounted on the connecting cylinder; the top of the second electric push rod is fixedly connected with a second fixing block, a motor is fixedly arranged in the second fixing block, a fixing cylinder is fixedly arranged on the motor, an output shaft of the motor is fixedly connected with a spline rod, the spline rod is rotationally installed in the fixing cylinder, and the outer side of the spline rod is in key connection with a key sleeve; a third connecting block is installed on the key sleeve, a magnetic connecting rod is installed in the third connecting block in a sliding mode, and a second spring is installed between the magnetic connecting rod and the third connecting block. The filter screen replacing device solves the problems that an existing filter screen replacing device cannot support filter screens with different mesh sizes, and bolts or nuts at multiple positions cannot be quickly dismounted or mounted.

Description

Technical Field

[0001] The invention relates to a filter screen replacement device for a film blowing machine, belonging to the field of film blowing machines. Background Art

[0002] Film blowing machine is a kind of equipment used for producing plastic film, which is widely used in packaging, agriculture, industry and other fields. Film blowing machine produces film with specific thickness, width and physical properties through the process of molten plastic extrusion, air flow cooling and inflation. In the working process of film blowing machine, the filter plays a vital role. It is mainly used to filter impurities in molten plastic and prevent these impurities from entering the die head, so as to ensure the quality and production efficiency of the film. There are still some shortcomings when replacing the filter.

[0003] The invention patent with publication number CN111893586B discloses a filtering device for polyester fiber processing, including an upper duct, a lower duct and a filter screen, the upper duct and the lower duct are fixedly arranged on a screen changing box and are connected; the filter screen is arranged in the screen changing box; the screen changing box at the connecting position of the upper duct and the lower duct is provided with an arc sealing surface, a rotating shaft is rotatably arranged in the screen changing box, four brackets are evenly and fixedly distributed at equal angles on the rotating shaft, the outer support plate and the inner support plate of the bracket are fixedly connected by a frame rod, the rotating contour surface of the outer support plate matches the outer contour of the arc sealing surface, and a support block is arranged at a position on the same horizontal line as the arc sealing surface and the rotating shaft; one end of the rotating shaft passes through the screen changing box and is fixedly connected to a power part, and a screen feeding device is fixedly arranged on the corresponding screen changing box wall plate at the other end of the rotating shaft; the technical problem of small number of filter screens replaced and low efficiency of traditional devices is solved. Although the above device can replace multiple filters at the same time, when in use, materials are easily stuck in the gap between the lower filter and the device shell. It cannot support filters of different mesh sizes when replacing filters, and it cannot quickly remove or install bolts or nuts at multiple positions.

[0004] Therefore, we made improvements to this and proposed a filter screen replacement device for a film blowing machine. Summary of the invention

[0005] (I) The technical problem to be solved by the present invention is that the existing filter disassembly device cannot support filter screens with different mesh sizes when replacing the filter screen, and cannot quickly remove or install bolts or nuts at multiple positions.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned invention object, the present invention provides a film blowing machine filter screen replacement device, including a first fixed block, a first electric push rod and a rotating plate are installed on the first fixed block, a connecting cylinder is fixedly arranged above the rotating plate, a second electric push rod is installed on the connecting cylinder, a second fixed block is fixedly connected to the top of the second electric push rod, a motor is fixedly arranged in the second fixed block, a fixing cylinder is fixedly arranged on the motor, a spline rod is fixedly connected to the output shaft of the motor, the spline rod is rotatably installed in the interior of the fixing cylinder, the outer key of the spline rod is connected to a key sleeve, and the key A third connecting block is installed on the sleeve, a magnetic connecting rod is slidably installed in the third connecting block, a second spring is installed between the magnetic connecting rod and the third connecting block, a supporting assembly is installed between the key sleeve and the second electric push rod, a connecting frame is installed on the fixed end of the first electric push rod, sliders are slidably installed all around the connecting frame, a fourth spring is installed between two adjacent sliders and between the slider closest to the central axis of the connecting frame and the connecting frame, a docking rod is fixedly provided on the slider, an adjusting assembly is installed on the docking rod, and a pressing assembly is installed between the docking rod and the connecting frame.

[0008] The rotating plate is rotatably mounted on the outer side of the first fixed block, and the first fixed block and the first electric push rod are fixedly connected.

[0009] Among them, the connecting tube and the second electric push rod are slidably connected, a first spring is installed between the connecting tube and the second electric push rod, a first traction steel rope is fixedly connected to the bottom of the second electric push rod, and the bottom of the first traction steel rope is connected to the rotating plate.

[0010] Among them, the support assembly includes a first support ring fixedly connected to the fixed end of the second electric push rod, a first connecting block is welded on the first support ring, a first connecting plate is rotatably installed on the first connecting block, a second connecting plate is slidably installed on the first connecting plate, a second connecting block is rotatably installed on the second connecting plate, a second support ring is welded above the second connecting block, and the second support ring and the key sleeve are fixedly connected.

[0011] Wherein, a movable groove is provided on the first connecting plate, an adjusting block is slidably installed in the movable groove, and the adjusting block is fixedly connected to the second connecting plate.

[0012] Among them, the second connecting block and the first connecting block are both fixedly provided with fixed shafts, vortex springs are installed between the fixed shaft on the first connecting block and the second connecting plate and between the fixed shaft on the second connecting block and the first connecting plate, and a third electric push rod is installed between the second connecting block and the fixed cylinder.

[0013] Wherein, a rubber pad is fixedly connected to the magnetic connection rod, and grooves are equidistantly arranged on the rubber pad.

[0014] Among them, the four sliding blocks farthest from the central axis of the connecting frame are fixedly connected with elastic ropes, and the elastic ropes run through the interior of the connecting frame. The elastic ropes are connected to the movable end of the first electric push rod through the guide wheel and the guide tube. The guide wheel and the connecting frame are rotatably connected, and the guide tube and the connecting frame are fixedly connected.

[0015] Wherein, the pressing assembly includes a connecting rod fixedly connected to the connecting frame, a sliding frame is slidably installed on the connecting rod and the docking rod, a third spring is installed between the sliding frame and the connecting frame, and the third spring is sleeved on the outer side of the connecting rod.

[0016] Among them, the adjustment component includes a slide groove opened on the docking rod, a slide plate is slidably installed in the slide groove, a guide rod is fixedly arranged in the slide groove, the guide rod passes through the interior of the slide plate, a second traction steel rope is fixedly connected to the slide plate, the second traction steel rope passes through the interior of the docking rod, the top of the second traction steel rope is forked, and both sides of the top of the second traction steel rope are connected to blocks, the block is slidably installed in the docking rod, and a fifth spring is installed between the docking rod and the block.

[0017] (III) Beneficial effects

[0018] The present invention provides a film blowing machine filter screen replacement device, which has the following beneficial effects:

[0019] 1. The device is provided with a connecting frame, a slider, an elastic rope, a fourth spring and a docking rod. When the elastic rope is pulled, the fourth spring at each position is stretched synchronously, so that the sliders at each position and the docking rods fixed on the surface thereof are stretched equidistantly to support filters with different mesh sizes. By inserting the docking rod into the filter at the corresponding position and stopping pulling the elastic rope, the fourth spring resets the sliders at each position and uses the docking rod to clamp multiple positions of the film blowing machine filter to adapt to the use of filters with different mesh sizes, thereby solving the problem that the existing filter replacement device cannot support filters with different mesh sizes for use when replacing the filter.

[0020] 2. The functions of quick disassembly and replacement of the filter are realized by the arranged pressing assembly and adjusting assembly. When the device removes the old filter, the first electric push rod is shortened so that the movable end of the first electric push rod pulls the elastic rope, thereby expanding the sliders and docking rods at multiple positions. There is no need to adjust them one by one, which enhances the convenience of the device when in use. The first electric push rod can simultaneously contract the sliders and docking rods at multiple positions, and the elastic rope enables the docking rod on the device to continue to shorten the first electric push rod even after it is pressed against the mesh of the filter. When the first electric push rod continues to contract, the slide frame will slide on the docking rod, and the third spring will be compressed, so that the slider acts on the slide plate on the adjusting assembly. The slide plate can contract by pulling the clamping block through the second traction steel rope, so that the device no longer clamps the filter. At this time, a new filter can be replaced. The functions of adjusting the docking distance, docking the filter and stopping clamping the filter can be realized through a single electric push rod, which enhances the convenience of the device when in use.

[0021] 3. The function of removing bolts or nuts at multiple positions of the film blowing machine filter is realized by setting the rotating plate, the second electric push rod and the motor. Before removing the filter, the device can be moved as a whole to the filter installation position of the film blowing machine, and the position of the motor can be adjusted by the rotating plate. During the adjustment process, the second electric push rod can be extended or shortened to make the magnetic coupling rod accurately align with the nut or bolt, and the equidistantly distributed magnetic coupling rods are wrapped around the hexagonal prism head of the bolt, and then the motor drives the spline rod to rotate, and the spline rod drives the key sleeve to rotate. During the rotation process, the key sleeve can drive the key sleeve and the third connecting block to rotate as a whole, thereby unscrewing the bolts or nuts on the filter, and the bolts or nuts at other positions can be unscrewed by rotating the connecting tube, which solves the problem that the existing filter replacement equipment cannot quickly remove or install bolts or nuts at multiple positions.

[0022] 4. The device is provided with a support assembly and a third electric push rod. When the third electric push rod is extended or shortened, the initial position of the magnetic coupling rod used to remove the bolts or nuts can be changed, thereby removing the bolts or nuts at different positions. The fixed shaft and the vortex spring on the support assembly can play an auxiliary supporting function. The slidingly installed first connecting plate and the second connecting plate can adapt to the third electric push rod with different elongation amounts, thereby ensuring the stability of the device during operation.

[0023] 5. The front end of the magnetic connection rod is provided with a rubber pad and a groove. When the filter screen and the film blowing machine are connected by screws, the rubber pad on the magnetic connection rod can be abutted against the screw. The groove on the rubber pad can increase the resistance of the contact surface, so that the device can not only remove the bolts or nuts, but also abut against the screw head and unscrew the screw, thereby enhancing the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 for Figure 1 A magnified schematic diagram of the structure at center A;

[0027] Figure 3 for Figure 1 A magnified schematic diagram of the structure at B in the middle;

[0028] Figure 4 It is a schematic diagram of the connection structure of the docking rod and the adjustment assembly of the present invention;

[0029] Figure 5 This is a schematic diagram of the internal structure of the docking rod of the present invention;

[0030] Figure 6 for Figure 5 A magnified schematic diagram of the structure at C in the middle;

[0031] Figure 7 This is a schematic diagram of the internal structure of the connecting tube of the present invention;

[0032] Figure 8 for Figure 7 A magnified schematic diagram of the structure at D in the middle;

[0033] Fig. 9 for Figure 7 A magnified schematic diagram of the structure at E in the middle;

[0034] Fig.10 for Figure 7 A magnified schematic diagram of the structure at F in the middle;

[0035] Fig.11 This is a schematic diagram of the internal structure of the third connecting block of the present invention;

[0036] Fig.12 for Fig.11 A magnified schematic diagram of the structure at G in the middle;

[0037] Fig.13 It is a working schematic diagram of the present invention.

[0038] Figure numerals: 1, first fixed block; 2, first electric push rod; 3, rotating plate; 4, connecting cylinder; 5, second electric push rod; 6, supporting assembly; 601, first supporting ring; 602, first connecting block; 603, first connecting plate; 604, moving groove; 605, adjusting block; 606, second connecting plate; 607, second connecting block; 608, second supporting ring; 7, fixed shaft; 8, vortex spring; 9, first spring; 10, first traction steel rope; 11, second fixed block; 12, motor; 13, spline rod; 14, fixing cylinder; 15, third electric push rod Rod; 16, key sleeve; 17, third connecting block; 18, magnetic connecting rod; 19, second spring; 20, rubber pad; 21, groove; 22, connecting frame; 23, pressing assembly; 2301, connecting rod; 2302, third spring; 2303, sliding frame; 24, sliding block; 25, fourth spring; 26, docking rod; 27, guide wheel; 28, elastic rope; 29, adjustment assembly; 2901, slide plate; 2902, slide groove; 2903, guide rod; 2904, second traction steel rope; 2905, block; 2906, fifth spring; 30, guide tube. DETAILED DESCRIPTION

[0039] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples of the specification. The following examples are only used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0040] Embodiment 1:

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.13As shown, this embodiment proposes a filter screen replacement device for a film blowing machine, comprising a first fixed block 1, on which a first electric push rod 2 and a rotating plate 3 are installed, a connecting cylinder 4 is fixedly arranged above the rotating plate 3, a second electric push rod 5 is installed on the connecting cylinder 4, a second fixed block 11 is fixedly connected to the top of the second electric push rod 5, a motor 12 is fixedly arranged in the second fixed block 11, and the rotation of the second electric push rod 5 and the motor 12 is changed by rotating the rotating plate 3, so as to adapt to the disassembly or replacement of filter screens of film blowing machines of different sizes, a fixed cylinder 14 is fixedly arranged on the motor 12, a spline rod 13 is fixedly connected to the output shaft of the motor 12, the spline rod 13 is rotatably installed in the interior of the fixed cylinder 14, the outer key of the spline rod 13 is connected to a key sleeve 16, the key sleeve 16 is installed on a third connecting block 17, a magnetic coupling rod 18 is slidably installed in the third connecting block 17, the spline rod 13 in the fixed cylinder 14 is driven to rotate by the motor 12, thereby driving the key sleeve 16 and the third connecting block 17 to rotate, as shown in FIG. Figure 8 As shown, a plurality of magnetic coupling rods 18 evenly distributed on the third connecting block 17 can abut against the outer contour of the bolt or nut, so as to unscrew the bolt or nut at the corresponding position, a second spring 19 is installed between the magnetic coupling rod 18 and the third connecting block 17, a support assembly 6 is installed between the key sleeve 16 and the second electric push rod 5, a connecting frame 22 is installed at the fixed end of the first electric push rod 2, and sliders 24 are slidably installed around the connecting frame 22, and there are two adjacent sliders 24 and between the slider 24 closest to the central axis of the connecting frame 22 and the connecting frame 22. A fourth spring 25 is installed between the two connecting rods 26, and a docking rod 26 is fixedly arranged on the slider 24. When the slider 24 away from the center of the device is pulled, the fourth spring 25 is synchronously extended, and the sliders 24 at other locations are synchronously pulled, thereby changing the positions of multiple docking rods 26 and keeping the adjacent docking rods 26 equidistant, so as to adapt to the support work of the filter screen with different mesh density for subsequent removal, and enhance the convenience of the device when used. An adjustment component 29 is installed on the docking rod 26, and a pressing component 23 is installed between the docking rod 26 and the connecting frame 22. The pressing component 23 can synchronously pull the elastic ropes 28 at multiple positions when the first electric push rod 2 is shortened, and the pressing component 23 can also act on the adjustment component 29, so that the docking rod 26 no longer clamps the filter screen, so as to remove the filter screen later.

[0042] Embodiment 2:

[0043] The solution in Example 1 is further introduced below in combination with a specific working method, as described below:

[0044] like Figure 1As shown, as a preferred embodiment, on the basis of the above method, further, the rotating plate 3 is rotatably installed on the outer side of the first fixed block 1, and the first fixed block 1 and the first electric push rod 2 are fixedly connected. The rotatably installed rotating plate 3 is convenient for subsequent adjustment of the required removal position according to the position of the bolt, and the first electric push rod 2 is used to adjust the filter support position.

[0045] like Fig.10 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the connecting cylinder 4 and the second electric push rod 5 are slidably connected, a first spring 9 is installed between the connecting cylinder 4 and the second electric push rod 5, and the bottom of the second electric push rod 5 is fixedly connected with a first traction steel rope 10, which can prevent the second electric push rod 5 from being removed from the connecting cylinder 4, and the bottom of the first traction steel rope 10 is connected to the rotating plate 3. The device can adapt to the disassembly and assembly of the square structure filter screen. After the device is moved to the inside of the film blowing machine, the second electric push rod 5 can be always tightened by the first spring 9, so that the top of the second electric push rod 5 can remain tightened when it moves to the corner of the inner wall of the film blowing machine, thereby making the device more stable during adjustment.

[0046] like Figure 7 As shown, as a preferred embodiment, on the basis of the above method, further, the support assembly 6 includes a first support ring 601 fixedly connected to the fixed end of the second electric push rod 5, a first connecting block 602 is welded on the first support ring 601, a first connecting plate 603 is rotatably mounted on the first connecting block 602, a second connecting plate 606 is slidably mounted on the first connecting plate 603, a second connecting block 607 is rotatably mounted on the second connecting plate 606, a second support ring 608 is welded above the second connecting block 607, and the second support ring 608 and the key sleeve 16 are fixedly connected. When the position of the key sleeve 16 changes, the first connecting plate 603 will rotate on the first connecting block 602 on the first support ring 601, the second connecting plate 606 will slide on the first connecting plate 603, and the second connecting plate 606 will rotate on the second connecting block 607 below the second support ring 608, so that the device can support the key sleeve 16 and adapt to changes in the position of the key sleeve 16.

[0047] like Figure 7 As shown, as a preferred embodiment, on the basis of the above method, further, a movable groove 604 is opened on the first connecting plate 603, and an adjusting block 605 is slidably installed in the movable groove 604. The adjusting block 605 and the second connecting plate 606 are fixedly connected. The adjusting block 605 can slide in the movable groove 604, so that the second connecting plate 606 moves smoothly, ensuring the stability of the device during operation.

[0048] like Figure 7 and Fig. 9As shown, as a preferred embodiment, on the basis of the above method, further, the second connecting block 607 and the first connecting block 602 are both fixedly provided with a fixed shaft 7, and a vortex spring 8 is installed between the fixed shaft 7 on the first connecting block 602 and the second connecting plate 606 and between the fixed shaft 7 on the second connecting block 607 and the first connecting plate 603, and a third electric push rod 15 is installed between the second connecting block 607 and the fixed cylinder 14, and the third electric push rod 15 can adjust the position of the second connecting block 607, and the vortex spring 8 on the outside of the fixed shaft 7 can provide torsion, so that the device can stably support the bottom of the second connecting block 607.

[0049] like Fig.11 and Fig.12 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, a rubber pad 20 is fixedly connected to the magnetic connection rod 18, and grooves 21 are equidistantly arranged on the rubber pad 20. The device can adapt to the removal and installation of screws. The device can be used in conjunction with the screws. The grooves 21 on the rubber pad 20 can increase the friction between the contact surface and the screw, thereby stably unscrewing the screw.

[0050] like Figure 1 , Figure 2 and Figure 3 As shown, as a preferred embodiment, on the basis of the above method, further, four sliders 24 farthest from the central axis of the connecting frame 22 are fixedly connected with elastic ropes 28, and the elastic ropes 28 run through the interior of the connecting frame 22. The elastic ropes 28 are connected to the movable end of the first electric push rod 2 through the guide wheel 27 and the guide tube 30. The guide wheel 27 and the connecting frame 22 are rotatably connected, and the guide tube 30 and the connecting frame 22 are fixedly connected. When the elastic rope 28 is pulled, the slider 24 farthest from the center of the device will be pulled first, so that the sliders 24 at various positions are pulled synchronously, and the guide wheel 27 and the guide tube 30 are used to guide the elastic ropes 28, so that the elastic ropes 28 at various locations can be pulled synchronously after being gathered.

[0051] like Figure 1 , Figure 2 and Figure 3 As shown, as a preferred embodiment, on the basis of the above method, further, the pressing assembly 23 includes a connecting rod 2301 fixedly connected to the connecting frame 22, and a sliding frame 2303 is slidably installed on the connecting rod 2301 and the docking rod 26, and a third spring 2302 is installed between the sliding frame 2303 and the connecting frame 22, and the third spring 2302 is sleeved on the outer side of the connecting rod 2301, and the connecting rod 2301 is used to guide the sliding frame 2303, and the third spring 2302 facilitates the subsequent resetting of the sliding frame 2303.

[0052] like Figure 4 , Figure 5 and Figure 6 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the adjustment component 29 includes a slide groove 2902 opened on the docking rod 26, a slide plate 2901 is slidably installed in the slide groove 2902, a guide rod 2903 is fixedly arranged in the slide groove 2902, the guide rod 2903 runs through the inside of the slide plate 2901, and a second traction steel rope 2904 is fixedly connected to the slide plate 2901, and the second traction steel rope 2904 runs through the inside of the docking rod 26. The top of the second traction steel rope 2904 is forked. Blocks 2905 are connected to both sides of the top of the guide steel rope 2904. The block 2905 is slidably installed in the docking rod 26. A fifth spring 2906 is installed between the docking rod 26 and the block 2905. The fifth spring 2906 can hold the block 2905 tightly. When the slide plate 2901 in the slide groove 2902 is pressed, the slide plate 2901 will slide on the guide rod 2903, thereby pulling the block 2905 through the second traction steel rope 2904 to shrink the block 2905, so as to remove the filter screen removed by the device and install a new filter screen.

[0053] Embodiment 3:

[0054] The schemes in Example 1 and Example 2 are further introduced below in combination with specific working methods, as described below for details:

[0055] Specifically, when the filter screen replacement device of the film blowing machine is used: Figure 1 and Fig.13 As shown, first adjust the spacing of the four groups of docking rods 26 on the connecting frame 22 according to the mesh size of the filter. When adjusting, first shorten the first electric push rod 2. The movable end of the first electric push rod 2 pulls the elastic rope 28. Under the guidance of the guide wheel 27 and the guide tube 30, the elastic rope 28 will first pull the four sliders 24 farthest from the center around the connecting frame 22. When these four sliders 24 are pulled, the fourth springs 25 at various locations are synchronously stretched, thereby expanding the sliders 24 and docking rods 26 at multiple positions without the need to adjust them one by one. After the docking rods 26 at various locations are adjusted to the appropriate position, they are installed in the filter of the film blowing machine. Since the elastic rope 28 has elastic force, the first electric push rod 2 can continue to shorten after shortening and synchronously adjusting multiple sliders 24 to the appropriate position, and maintain the docking state of the docking rod 26 and the mesh of the filter. As shown Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the device can achieve the three functions of adjusting the docking distance, docking the filter and stopping the clamping of the filter through a single first electric push rod 2. When the first electric push rod 2 continues to shorten, the slide frame 2303 will slide on the docking rod 26 and the connecting rod 2301, and the third spring 2302 will be compressed, so that the slider 24 pushes the slide plate 2901 on the adjustment component 29, and the slide plate 2901 slides in the slide groove 2902. The fifth spring 2906 is compressed, and the guide rod 2903 ensures that the slide plate 2901 moves straight, and the clamping block 2905 is pulled by the second traction steel rope 2904, so that the clamping block 2905 is stored in the docking rod 26, so that the docking rod 26 no longer clamps the filter through the clamping block 2905, but only inserts into the mesh of the filter. At this time, a new filter can be replaced.

[0056] like Figure 1 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.13 As shown in the figure, when removing and installing the filter screen, the bolts, nuts or screws need to be removed first. When removing the bolts or nuts, such as Figure 7 and Figure 8 As shown, the angle of the second electric push rod 5 and the motor 12 is adjusted by the rotating plate 3, and the position of the motor 12 from the central axis of the connecting frame 22 is changed by the second electric push rod 5, so as to adapt to the film blowing machine filter screens of different sizes and the bolts or nuts in the positions that are not passed on the film blowing machine filter screen for disassembly or replacement. The spline rod 13 in the fixed cylinder 14 is driven to rotate by the motor 12, thereby driving the key sleeve 16 and the third connecting block 17 to rotate, and the multiple magnetic coupling rods 18 evenly distributed on the third connecting block 17 can abut on the outer contour of the bolt or nut, and the second spring 19 on the magnetic coupling rod 18 at the local position is compressed, and the magnetic coupling rod 18 is used to absorb the bolt or nut, so as to screw out the bolt or nut at the corresponding position. When the screw needs to be removed, the grooves 21 distributed at equal intervals can increase the friction between the contact surface of the rubber pad 20 on the magnetic coupling rod 18 and the screw, so as to stably screw out the screw and make the screw adsorbed on the magnetic coupling rod 18. The device can adjust the position of the magnetic coupling rod 18 according to the position of the filter screen installed in the film blowing machine, and change the position of the key sleeve 16 by extending the third electric push rod 15 between the fixed cylinder 14 and the second support ring 608. The key sleeve 16 will slide on the spline rod 13, the second connecting plate 606 rotates on the second connecting block 607, the first connecting plate 603 rotates on the first connecting block 602, and the second connecting plate 606 slides on the first connecting plate 603 through the movable groove 604 and the adjustment block 605, so that the support component 6 can continuously support the key sleeve 16, and the vortex spring 8 on the outside of the fixed shaft 7 can provide torsion, thereby improving the stability of the support component 6 supporting the key sleeve 16. Fig.10 As shown, the second electric push rod 5 is tightened by the first spring 9 so that the top of the second electric push rod 5 can remain tightened when it moves to the corner of the inner wall of the film blowing machine, making the adjustment of the second electric push rod 5 more convenient. The first traction steel rope 10 can prevent the second electric push rod 5 from detaching from the connecting tube 4.

[0057] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A filter screen replacement device for a film blowing machine, comprising a first fixing block (1), characterized in that: The first fixed block (1) is provided with a first electric push rod (2) and a rotating plate (3); a connecting tube (4) is fixedly arranged above the rotating plate (3); a second electric push rod (5) is installed on the connecting tube (4); a second fixed block (11) is fixedly connected to the top of the second electric push rod (5); a motor (12) is fixedly arranged inside the second fixed block (11); a fixing tube (14) is fixedly arranged on the motor (12); a spline rod (13) is fixedly connected to the output shaft of the motor (12); the spline rod (13) is rotatably mounted inside the fixing tube (14); an outer key of the spline rod (13) is connected to a key sleeve (16); a third connecting block (17) is installed on the key sleeve (16); a third connecting block (17) is slidably mounted inside the third connecting block (17); A magnetic coupling rod (18) is provided, a second spring (19) is installed between the magnetic coupling rod (18) and the third connecting block (17), a supporting assembly (6) is installed between the key sleeve (16) and the second electric push rod (5), a connecting frame (22) is installed at the fixed end of the first electric push rod (2), sliders (24) are slidably installed around the connecting frame (22), a fourth spring (25) is installed between two adjacent sliders (24) and between the slider (24) closest to the central axis of the connecting frame (22) and the connecting frame (22), a docking rod (26) is fixedly arranged on the slider (24), an adjusting assembly (29) is installed on the docking rod (26), and a pressing assembly (23) is installed between the docking rod (26) and the connecting frame (22).

2. The filter screen replacement device for a film blowing machine according to claim 1, characterized in that: The rotating plate (3) is rotatably mounted on the outside of the first fixed block (1), and the first fixed block (1) and the first electric push rod (2) are fixedly connected.

3. The filter screen replacement device for a film blowing machine according to claim 1, characterized in that: The connecting tube (4) and the second electric push rod (5) are slidably connected, a first spring (9) is installed between the connecting tube (4) and the second electric push rod (5), a first traction steel rope (10) is fixedly connected to the bottom of the second electric push rod (5), and the bottom of the first traction steel rope (10) is connected to the rotating plate (3).

4. The filter screen replacement device for a film blowing machine according to claim 1, characterized in that: The support assembly (6) comprises a first support ring (601) fixedly connected to the fixed end of the second electric push rod (5), a first connecting block (602) is welded to the first support ring (601), a first connecting plate (603) is rotatably mounted on the first connecting block (602), a second connecting plate (606) is slidably mounted on the first connecting plate (603), a second connecting block (607) is rotatably mounted on the second connecting plate (606), a second support ring (608) is welded above the second connecting block (607), and the second support ring (608) and the key sleeve (16) are fixedly connected.

5. The filter screen replacement device for a film blowing machine according to claim 4, characterized in that: The first connecting plate (603) is provided with a movable groove (604), an adjusting block (605) is slidably installed in the movable groove (604), and the adjusting block (605) and the second connecting plate (606) are fixedly connected.

6. The filter screen replacement device for a film blowing machine according to claim 4, characterized in that: A fixed shaft (7) is fixedly arranged on the second connecting block (607) and the first connecting block (602); a vortex spring (8) is installed between the fixed shaft (7) and the second connecting plate (606) on the first connecting block (602) and between the fixed shaft (7) and the first connecting plate (603) on the second connecting block (607); and a third electric push rod (15) is installed between the second connecting block (607) and the fixed cylinder (14).

7. The filter screen replacement device for a film blowing machine according to claim 1, characterized in that: A rubber pad (20) is fixedly connected to the magnetic coupling rod (18), and grooves (21) are equidistantly arranged on the rubber pad (20).

8. The filter screen replacement device for a film blowing machine according to claim 1, characterized in that: The four sliders (24) which are farthest from the central axis of the connecting frame (22) are all fixedly connected with elastic ropes (28), the elastic ropes (28) pass through the interior of the connecting frame (22), the elastic ropes (28) are guided by guide wheels (27) and guide tubes (30) and connected to the movable end of the first electric push rod (2), the guide wheels (27) and the connecting frame (22) are rotatably connected, and the guide tubes (30) and the connecting frame (22) are fixedly connected.

9. The filter screen replacement device for a film blowing machine according to claim 1, characterized in that: The pressing assembly (23) comprises a connecting rod (2301) fixedly connected to the connecting frame (22); a sliding frame (2303) is slidably mounted on the connecting rod (2301) and the docking rod (26); a third spring (2302) is mounted between the sliding frame (2303) and the connecting frame (22); and the third spring (2302) is sleeved on the outer side of the connecting rod (2301).

10. The filter screen replacement device for a film blowing machine according to claim 1, characterized in that: The adjustment component (29) includes a slide groove (2902) opened on the docking rod (26), a slide plate (2901) is slidably installed in the slide groove (2902), a guide rod (2903) is fixedly arranged in the slide groove (2902), the guide rod (2903) passes through the inside of the slide plate (2901), a second traction steel rope (2904) is fixedly connected to the slide plate (2901), the second traction steel rope (2904) passes through the inside of the docking rod (26), the top of the second traction steel rope (2904) is forked, and both sides of the top of the second traction steel rope (2904) are connected to a clamping block (2905), the clamping block (2905) is slidably installed in the docking rod (26), and a fifth spring (2906) is installed between the docking rod (26) and the clamping block (2905).

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