A plastic film corrosion resistance testing device and testing method

Abstract

The present invention discloses a plastic film corrosion resistance performance testing device and a testing method, and relates to the technical field of testing devices. The plastic film corrosion resistance performance testing device comprises a U-shaped plate, and an upper telescopic cylinder is fixedly installed on the top inner wall of the U-shaped plate. The present invention places the plastic film to be tested on the top of two lower sealing sleeves, and then starts the upper telescopic cylinder. The output end of the upper telescopic cylinder stretches and drives the L-shaped plate to move downward, thereby causing the two upper sealing sleeves to move downward. The two upper sealing sleeves move downward to press the plastic film against the top of the two lower sealing sleeves. The corrosive liquid can be discharged into one of the upper sealing sleeves through a liquid inlet mechanism, and then the strength of a normal plastic film and a corroded plastic film can be compared by providing two test structures. The strength of the normal plastic film and the corroded plastic film can be marked by two marking mechanisms, and it is convenient for users to observe and compare.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a device and method for detecting corrosion resistance of a plastic film. Background Art

[0002] Plastic film refers to a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, which is mainly used for packaging and as a coating layer. The Chinese patent publication number CN117169101B discloses a corrosion resistance detection device for plastic film. When the plastic film is corroded, it judges whether the plastic film can be penetrated, and then feeds back the result. It cannot be compared with a normal plastic film. At the same time, the corrosion resistance strength of the plastic film cannot be judged, which is not convenient for users to observe. Therefore, the present invention discloses a plastic film corrosion resistance detection device and detection method to meet people's needs. Summary of the invention

[0003] The purpose of the present invention is to provide a plastic film corrosion resistance testing device and a testing method to solve the existing problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a plastic film corrosion resistance testing device, comprising a U-shaped plate, an upper telescopic cylinder is fixedly installed on the inner wall of the top side of the U-shaped plate, an L-shaped plate is fixedly installed on the output end of the upper telescopic cylinder, two L-shaped rods are fixedly installed on the side of the L-shaped plate, and right-angled triangle blocks are fixedly installed on the bottom ends of the two L-shaped rods, two upper sealing sleeves are fixedly installed on the bottom of the L-shaped plate, a liquid inlet mechanism for feeding liquid into one of the upper sealing sleeves is fixedly installed on the vertical side of the L-shaped plate, and the vertical inner wall of the U-shaped plate is fixedly installed through two Two lower sealing sleeves are fixedly installed on each connecting rod, and the positions of the two lower sealing sleeves correspond to those of the two upper sealing sleeves. A liquid outlet mechanism for discharging liquid to one of the lower sealing sleeves is fixedly installed on the vertical inner wall of the U-shaped plate. A lower telescopic cylinder is fixedly installed on the inner wall of the bottom side of the U-shaped plate, and a bottom plate is fixedly installed on the output end of the lower telescopic cylinder. Two testing mechanisms are installed on the top of the bottom plate, and marking mechanisms are installed on both sides of the bottom plate. The two marking mechanisms are respectively installed in cooperation with the two right-angle triangle blocks, and the two testing mechanisms are installed in cooperation with the two marking mechanisms.

[0005] Preferably, the testing mechanism includes a sliding column fixedly mounted on the top of the base plate, a slider is slidably sleeved on the sliding column, an extrusion column is fixedly mounted on the side of the slider, a tooth groove is opened on the side of the extrusion column, the top end of the extrusion column extends into the corresponding lower sealing sleeve, a piston is fixedly sleeved on the extrusion column, the piston is slidably connected to the inner wall of the lower sealing sleeve, a mounting rod is fixedly mounted on the top end of the extrusion column, and a mounting plate is fixedly mounted on the top end of the mounting rod.

[0006] Preferably, the testing mechanism includes a mounting plate fixedly mounted on the top of the base plate and two guide rods, a moving gear is rotatably mounted on the side of the mounting plate, the moving gear is meshed with the tooth groove, an eccentrically arranged extrusion rod is fixedly mounted on the side of the moving gear, mounting columns are slidably sleeved on the two guide rods, an extrusion frame is fixedly mounted on the side of the mounting column, one end of the extrusion rod extends into the extrusion frame, a circular hole is opened on the side of the mounting column, a marking pen is arranged in the circular hole, a threaded hole is opened on the inner wall of the top side of the circular hole, a bolt is threadedly mounted in the threaded hole, and the bottom end of the bolt abuts against the side of the marking pen.

[0007] Preferably, the marking mechanism includes two slide grooves opened on the vertical side portions of the base plate, slide rods are slidably installed in the two slide grooves, one end of the two slide rods respectively extends to the outside of the two slide grooves and a movable plate is fixedly installed, extrusion springs are sleeved on the two slide rods, two ends of the extrusion springs are respectively fixedly installed on the sides of the movable plate and the base plate close to each other, a rotating groove and a rotating hole are opened on the top of the movable plate, rotating shafts are rotatably installed in the rotating groove and the rotating hole, the top ends of the two rotating shafts respectively extend to the outside of the rotating groove and the rotating hole and a rotating cylinder is fixedly sleeved, white marking tapes are tensioned on the two rotating cylinders, the white marking tapes correspond to the positions of the marking pens, and a rotating component is installed on the side of the movable plate away from the base plate.

[0008] Preferably, the rotating assembly includes a horizontal bevel gear fixedly mounted on the bottom end of the rotating shaft, a vertical plate is fixedly mounted on the side of the movable plate away from the bottom plate, an inner gear and an outer gear are rotatably mounted on the side of the vertical plate, a vertical bevel gear is fixedly mounted on the side of the inner gear, the vertical bevel gear is meshed with the horizontal bevel gear, three evenly arranged pressure columns are fixedly mounted on the side of the outer gear, the pressure columns correspond to the positions of the right-angle triangle blocks, and a movable unit is mounted on the bottom of the vertical plate.

[0009] Preferably, the movable unit includes a pressure plate fixedly mounted on the bottom of the vertical plate, a movable wheel is rotatably mounted on the bottom end of the pressure plate, an extrusion triangle plate is fixedly mounted on the bottom inner wall of the U-shaped plate, and the movable wheel contacts the inclined side of the extrusion triangle plate.

[0010] Preferably, the liquid outlet mechanism comprises a collecting box fixedly mounted on the vertical inner wall of the U-shaped plate, a communicating liquid outlet pipe is mounted on the side of the collecting box, and a top end of the liquid outlet pipe is connected to a side of one of the lower sealing sleeves.

[0011] Preferably, the liquid inlet mechanism includes a liquid storage tank fixedly mounted on the vertical side of the L-shaped plate, a connected liquid inlet pipe installed at the bottom of the liquid storage tank, the bottom end of the liquid inlet pipe is fixedly mounted on the side of one of the upper sealing sleeves, the liquid inlet pipe is connected to the upper sealing sleeve, a connected air pipe is fixedly mounted on the top of the liquid storage tank, the bottom end of the air pipe is fixedly connected to the side of the upper sealing sleeve, the air pipe is connected to the upper sealing sleeve, the height of the bottom end of the air pipe is above the height of the bottom end of the liquid inlet pipe, a solenoid valve is installed on the liquid inlet pipe, and a valve is installed on the air pipe.

[0012] Preferably, the air permeable tube, the liquid inlet tube and the collecting box are located on the same side.

[0013] The present invention also discloses a method for detecting a plastic film corrosion resistance detection device, the method comprising the following steps:

[0014] Step 1: When in use, place the plastic film to be tested on the top of the two lower sealing sleeves, then start the upper telescopic cylinder, the output end of the upper telescopic cylinder is stretched to drive the L-shaped plate to move downward, thereby causing the two upper sealing sleeves to move downward, the two upper sealing sleeves move downward to press the plastic film against the top of the two lower sealing sleeves, start the valve, and then start the solenoid valve to allow the corrosive liquid in the liquid storage tank to enter an upper sealing sleeve through the liquid inlet pipe, so that it is located above the plastic film, and at the same time, the movement of the L-shaped plate drives the two L-shaped rods and two right-angled triangle blocks to move downward, and the two right-angled triangle blocks move downward to be located below between the pressure column and the bottom plate;

[0015] Step 2: After the corrosive liquid has corroded for a period of time, the lower telescopic cylinder is started, and the output end of the lower telescopic cylinder is stretched to drive the bottom plate to move upward, thereby driving the two sliding columns and the two extrusion columns to move upward. The movement of the extrusion columns drives the piston, the mounting rod and the mounting plate to move upward. At this time, the moving wheels at the bottom of the two pressure plates are slowly separated from the extrusion triangle plates. Since the four extrusion springs are in a deformed state, the two moving plates are brought closer to each other under the action of the four extrusion springs, and then the two white marking belts are brought closer to each other. When the moving wheels are separated from the extrusion triangle plates, the four extrusion springs are still in a deformed state, and the two white marking belts are against the two marking pens. At the same time, the movement of the moving plate causes the vertical plate, the outer gear and the pressure column to move, wherein the pressure column is located above the right-angle triangle block.

[0016] Step 3. When the two mounting plates continue to move and contact the plastic film, the two mounting plates move to squeeze the plastic films located on the top of the two lower sealing sleeves respectively. The normal plastic film is not corroded and therefore has a certain strength, so that one of the mounting plates cannot move, and the mounting rod and the extrusion column cannot move, but the sliding column and the bottom plate keep moving, so that the reset spring is deformed, and the mounting plate moves at the same time, so that the moving gear rotates, and the rotation of the moving gear causes the extrusion rod to rotate and then squeeze the inner wall of the extrusion frame, so that the extrusion frame and the mounting column move, and the movement of the mounting column drives the marker pen and the bolt to move, so that The white marking tape leaves a mark that moves upward until the mounting plate penetrates the plastic film. Under the action of the reset spring, the squeezing column returns to its original state, thereby restoring the marker pen to its original state. The other corroded plastic film has been corroded and has a lower strength than a normal plastic film. Therefore, the time it squeezes the other mounting plate to prevent it from moving is short, thereby shortening the distance that the other squeezing column moves, and shortening the mark left by the other marker pen on the other white marking tape. When the other mounting plate penetrates the corroded plastic film, the corroded liquid enters the lower sealing sleeve and enters the collection box through the liquid outlet pipe to complete collection.

[0017] Step 4. After the two markers leave their marks, the output end of the lower telescopic cylinder contracts to drive the two upper sealing sleeves, the two L-shaped rods and the two right-angled triangle blocks to move. The two right-angled triangle blocks squeeze the two pressure columns to make the two pressure columns rotate. The two pressure columns are squeezed by the inclined tops of the two right-angled triangle blocks to make the two external gears rotate. When the inclined sides of the two right-angled triangle blocks are separated from the two pressure columns, the two external gears no longer rotate. The other two external gears correspond to the positions of the two right-angled triangle blocks respectively, which is convenient for the next extrusion. During the rotation of the two external gears, the two internal gears and the two vertical bevel gears are driven to rotate. The rotation of the two vertical bevel gears drives the two horizontal bevel gears to rotate. The rotation of the two horizontal bevel gears drives the two rotating shafts to rotate. The rotation of the two rotating shafts drives the two rotating cylinders to rotate, thereby making the two white marking tapes rotate, so that the marks drawn by the two markers move toward the opening of the U-shaped plate, and then the output end of the lower telescopic cylinder contracts to restore the device to its original state.

[0018] In summary, the technical effects and advantages of the present invention are as follows:

[0019] The invention has a reasonable structure. When in use, a plastic film to be tested is placed on the top of two lower sealing sleeves, and then the upper telescopic cylinder is started. The output end of the upper telescopic cylinder is stretched to drive the L-shaped plate to move downward, thereby causing the two upper sealing sleeves to move downward. The two upper sealing sleeves move downward to press the plastic film against the top of the two lower sealing sleeves. Corrosive liquid can be discharged into one of the upper sealing sleeves through a liquid inlet mechanism. Then, by providing two test structures, the strength of a normal plastic film and a corroded plastic film can be compared. The strength of the normal plastic film and the corroded plastic film can be marked through two marking mechanisms, and it is convenient for users to observe and compare.

[0020] In the present invention, when the two mounting plates continue to move and contact the plastic film, the two mounting plates move to squeeze the plastic films respectively located on the top of the two lower sealing sleeves. The normal plastic film is not corroded and therefore has a certain strength, so that one of the mounting plates cannot move, and the mounting rod and the extrusion column cannot move, but the sliding column and the bottom plate keep moving, so that the reset spring is deformed, and the mounting plate moves at the same time, so that the moving gear rotates, and the rotation of the moving gear causes the extrusion rod to rotate and then squeezes the inner wall of the extrusion frame to move the extrusion frame and the mounting column. The movement of the mounting column drives the marker pen and the bolt to move, so that line marking is performed according to the strength of the plastic film.

[0021] In the present invention, after the two markers leave their marks, the output end of the lower telescopic cylinder contracts, driving the two upper sealing sleeves, the two L-shaped rods and the two right-angled triangular blocks to move, the two right-angled triangular blocks squeeze the two pressure columns to make the two pressure columns rotate, the two pressure columns are squeezed by the inclined tops of the two right-angled triangular blocks, thereby making the two external gears rotate, and when the inclined sides of the two right-angled triangular blocks are separated from the two pressure columns, the two external gears no longer rotate, and the other two external gears correspond to the positions of the two right-angled triangular blocks respectively, which is convenient for the next squeezing, and during the rotation of the two external gears, the two internal gears and the two vertical bevel gears are driven to rotate, the rotation of the two vertical bevel gears drives the two horizontal bevel gears to rotate, the rotation of the two horizontal bevel gears drives the two rotating shafts to rotate, and the rotation of the two rotating shafts drives the two rotating cylinders to rotate, thereby making the two white marking tapes rotate, thereby making the marks drawn by the two markers move toward the opening of the U-shaped plate, so that the user can observe the length of the lines of the normal plastic film and the corroded plastic film from the front. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of a first-view stereoscopic structure of an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of a second viewing angle stereoscopic structure of an embodiment of the present invention;

[0025] Figure 3 It is a schematic structural diagram of the bottom plate, the testing mechanism and the marking mechanism from the first perspective of an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the structure of a testing mechanism according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic structural diagram of the bottom plate, the testing mechanism and the marking mechanism from a second viewing angle according to an embodiment of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the bottom plate, the testing mechanism and the marking mechanism from a third perspective of an embodiment of the present invention;

[0029] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0030] Figure 8 It is a cross-sectional view of the connection between the lower sealing sleeve, the piston, the extrusion column, the mounting rod and the mounting plate according to an embodiment of the present invention.

[0031] In the figure: 1, U-shaped plate; 2, upper telescopic cylinder; 3, L-shaped plate; 4, upper sealing sleeve; 5, connecting rod; 6, lower sealing sleeve; 7, lower telescopic cylinder; 8, bottom plate; 9, L-shaped rod; 10, right-angle triangle block; 11, sliding column; 12, sliding block; 13, return spring; 14, extrusion column; 15, tooth groove; 16, mounting plate; 17, moving gear; 18, extrusion rod; 19, extrusion frame; 20, guide rod; 21, mounting column; 22, marking pen; 23, bolt; 24, sliding column; rod; 25, extrusion spring; 26, moving plate; 27, rotating cylinder; 28, white marking tape; 29, rotating shaft; 30, horizontal bevel gear; 31, internal gear; 32, vertical bevel gear; 33, external gear; 34, pressure column; 35, vertical plate; 36, pressure plate; 37, extrusion triangle plate; 38, piston; 39, mounting rod; 40, mounting plate; 41, liquid storage tank; 42, air vent; 43, liquid inlet pipe; 44, solenoid valve; 45, collection box; 46, liquid outlet pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example: Reference Figure 1-Figure 8 The plastic film corrosion resistance testing device shown in the figure comprises a U-shaped plate 1, an upper telescopic cylinder 2 is fixedly installed on the inner wall of the top side of the U-shaped plate 1, an L-shaped plate 3 is fixedly installed on the output end of the upper telescopic cylinder 2, two L-shaped rods 9 are fixedly installed on the side of the L-shaped plate 3, and the bottom ends of the two L-shaped rods 9 are fixedly installed with right-angle triangle blocks 10, two upper sealing sleeves 4 are fixedly installed on the bottom of the L-shaped plate 3, and a liquid inlet mechanism for feeding liquid into one of the upper sealing sleeves 4 is fixedly installed on the vertical side of the L-shaped plate 3. The vertical inner wall of the U-shaped plate 1 is fixed by two connecting rods 5. Two lower sealing sleeves 6 are fixedly installed, and the positions of the two lower sealing sleeves 6 correspond to those of the two upper sealing sleeves 4. A liquid outlet mechanism for discharging liquid to one of the lower sealing sleeves 6 is fixedly installed on the vertical inner wall of the U-shaped plate 1. A lower telescopic cylinder 7 is fixedly installed on the inner wall of the bottom side of the U-shaped plate 1. A bottom plate 8 is fixedly installed on the output end of the lower telescopic cylinder 7. Two testing mechanisms are installed on the top of the bottom plate 8. Marking mechanisms are installed on both sides of the bottom plate 8. The two marking mechanisms are respectively installed in cooperation with two right-angle triangle blocks 10, and the two testing mechanisms are installed in cooperation with the two marking mechanisms.

[0034] By means of the above structure: when in use, the plastic film to be tested is placed on the top of the two lower sealing sleeves 6, and then the upper telescopic cylinder 2 is started. The output end of the upper telescopic cylinder 2 is stretched to drive the L-shaped plate 3 to move downward, thereby causing the two upper sealing sleeves 4 to move downward. The two upper sealing sleeves 4 move downward to press the plastic film against the top of the two lower sealing sleeves 6. The corrosive liquid can be discharged into one of the upper sealing sleeves 4 through the liquid inlet mechanism. Then, by providing two test structures, the strength of the normal plastic film and the corroded plastic film can be compared. The strength of the normal plastic film and the corroded plastic film can be marked through two marking mechanisms, which is convenient for users to observe and compare.

[0035] like Figure 3-Figure 5As shown, the test mechanism includes a sliding column 11 fixedly mounted on the top of the bottom plate 8, a slider 12 is slidably sleeved on the sliding column 11, an extrusion column 14 is fixedly mounted on the side of the slider 12, a tooth groove 15 is provided on the side of the extrusion column 14, the top of the extrusion column 14 extends into the corresponding lower sealing sleeve 6, a piston 38 is fixedly sleeved on the extrusion column 14, the piston 38 is slidably connected to the inner wall of the lower sealing sleeve 6, a mounting rod 39 is fixedly mounted on the top of the extrusion column 14, and a mounting plate 40 is fixedly mounted on the top of the mounting rod 39. Through the arrangement of the mounting rod 39 and the mounting plate 40, when the mounting plate 40 passes through the plastic film, the hole passed through is large, and the diameter of the mounting rod 39 is lower than the diameter of the mounting plate 40, so that the corrosive liquid flows into the lower sealing sleeve 6 through the hole passed through the plastic film, and is easy to discharge.

[0036] like Figure 3-Figure 5 As shown, the test mechanism includes a mounting plate 16 fixedly mounted on the top of the base plate 8 and two guide rods 20, a moving gear 17 is rotatably mounted on the side of the mounting plate 16, the moving gear 17 is meshed with the tooth groove 15, an eccentrically arranged extrusion rod 18 is fixedly mounted on the side of the moving gear 17, a mounting column 21 is slidably sleeved on the two guide rods 20, an extrusion frame 19 is fixedly mounted on the side of the mounting column 21, one end of the extrusion rod 18 extends into the extrusion frame 19, a circular hole is opened on the side of the mounting column 21, a marking pen 22 is arranged in the circular hole, a threaded hole is opened on the inner wall of the top side of the circular hole, a bolt 23 is threadedly mounted in the threaded hole, and the bottom end of the bolt 23 abuts against the side of the marking pen 22. When the two mounting plates 40 continue to move and contact the plastic film, the two mounting plates 40 move to squeeze the plastic films located on the top of the two lower sealing sleeves 6 respectively. The normal plastic film is not corroded and therefore has a certain strength, so that one of the mounting plates 40 cannot move, and the mounting rod 39 and the extrusion column 14 cannot move. However, the sliding column 11 and the bottom plate 8 keep moving, so that the return spring 13 is deformed, and the mounting plate 16 moves at the same time, so that the moving gear 17 rotates. The rotation of the moving gear 17 causes the extrusion rod 18 to rotate and then squeezes the inner wall of the extrusion frame 19, so that the extrusion frame 19 and the mounting column 21 move. The movement of the mounting column 21 drives the marker pen 22 and the bolt 23 to move.

[0037] like Figure 6-Figure 7As shown, the marking mechanism includes two slide grooves opened on the vertical side of the base plate 8, and slide rods 24 are slidably installed in the two slide grooves. One end of the two slide rods 24 extends to the outside of the two slide grooves and a movable plate 26 is fixedly installed. The two slide rods 24 are sleeved with extrusion springs 25, and the two ends of the extrusion springs 25 are respectively fixedly installed on the sides of the movable plate 26 and the base plate 8 close to each other. A rotating groove and a rotating hole are opened on the top of the movable plate 26, and a rotating shaft 29 is rotatably installed in the rotating groove and the rotating hole. The top ends of the two rotating shafts 29 extend to the outside of the rotating groove and the rotating hole and a rotating cylinder 27 is fixedly sleeved. White marking tapes 28 are stretched on the two rotating cylinders 27, and the white marking tapes 28 correspond to the position of the marker 22. A rotating component is installed on the side of the movable plate 26 away from the base plate 8. The movement of the mounting post 21 drives the marker pen 22 and the bolt 23 to move, thereby leaving upward moving handwriting on the white marking tape 28 until the mounting plate 40 penetrates the plastic film. Under the action of the reset spring 13, the squeezing post 14 returns to its original state, thereby restoring the marker pen 22 to its original state. The other corroded plastic film has been corroded and has a lower strength than a normal plastic film. Therefore, the time it squeezes the other mounting plate 40 to make it unable to move is short, thereby shortening the moving distance of the other squeezing post 14 and shortening the handwriting left by the other marker pen 22 on the other white marking tape 28.

[0038] like Figure 6-Figure 7As shown, the rotating assembly includes a horizontal bevel gear 30 fixedly mounted on the bottom end of the rotating shaft 29, a vertical plate 35 is fixedly mounted on the side of the movable plate 26 away from the bottom plate 8, and a meshing internal gear 31 and an external gear 33 are rotatably mounted on the side of the vertical plate 35, a vertical bevel gear 32 is fixedly mounted on the side of the internal gear 31, and the vertical bevel gear 32 is meshed with the horizontal bevel gear 30, and three uniformly arranged pressure columns 34 are fixedly mounted on the side of the external gear 33, and the pressure columns 34 correspond to the positions of the right-angle triangle block 10, and a moving unit is installed at the bottom of the vertical plate 35; the moving unit includes a pressure plate 36 fixedly mounted on the bottom of the vertical plate 35, and a moving wheel is rotatably mounted on the bottom end of the pressure plate 36, and an extrusion triangle plate 37 is fixedly mounted on the inner wall of the bottom side of the U-shaped plate 1, and the moving wheel contacts the inclined side of the extrusion triangle plate 37. After the two marking pens 22 leave their marks, the output end of the lower telescopic cylinder 7 contracts, driving the two upper sealing sleeves 4, the two L-shaped rods 9 and the two right-angled triangle blocks 10 to move. The two right-angled triangle blocks 10 squeeze the two pressure columns 34 so that the two pressure columns 34 rotate. The two pressure columns 34 are squeezed by the inclined tops of the two right-angled triangle blocks 10 so that the two external gears 33 rotate. When the inclined sides of the two right-angled triangle blocks 10 are separated from the two pressure columns 34, the two external gears 33 no longer rotate. The other two external gears 33 correspond to the positions of the two right-angled triangle blocks 10, respectively, to facilitate the next squeezing. During the rotation of the two outer gears 33, the two inner gears 31 and the two vertical bevel gears 32 are driven to rotate. The rotation of the two vertical bevel gears 32 drives the two horizontal bevel gears 30 to rotate. The rotation of the two horizontal bevel gears 30 drives the two rotating shafts 29 to rotate. The rotation of the two rotating shafts 29 drives the two rotating cylinders 27 to rotate, thereby causing the two white marking tapes 28 to rotate, so that the marks drawn by the two marking pens 22 move toward the opening of the U-shaped plate 1, so that the user can observe the length of the lines of the normal plastic film and the corroded plastic film from the front, thereby judging its corrosion resistance.

[0039] like Figure 1 , Figure 2 and Figure 8As shown, the liquid outlet mechanism includes a collecting box 45 fixedly mounted on the vertical inner wall of the U-shaped plate 1, a liquid outlet pipe 46 is installed on the side of the collecting box 45, and the top of the liquid outlet pipe 46 is connected to the side of one of the lower sealing sleeves 6. The liquid inlet mechanism includes a liquid storage box 41 fixedly mounted on the vertical side of the L-shaped plate 3, and a liquid inlet pipe 43 is installed at the bottom of the liquid storage box 41. The bottom end of the liquid inlet pipe 43 is fixedly mounted on the side of one of the upper sealing sleeves 4, and the inlet pipe 43 is connected to the bottom of the liquid storage box 41. The liquid pipe 43 is connected to the upper sealing sleeve 4, and a connected air pipe 42 is fixedly installed on the top of the liquid storage tank 41. The bottom end of the air pipe 42 is fixedly connected to the side of the upper sealing sleeve 4. The air pipe 42 is connected to the upper sealing sleeve 4, and the height of the bottom end of the air pipe 42 is located at the height of the bottom end of the liquid inlet pipe 43. The liquid inlet pipe 43 is installed with a solenoid valve 44, and the air pipe 42 is installed with a valve. The air pipe 42, the liquid inlet pipe 43 and the collection box 45 are located on the same side. Start the valve, and then start the solenoid valve 44 to allow the corrosive liquid in the liquid storage tank 41 to enter an upper sealing sleeve 4 through the liquid inlet pipe 43, so as to be located above the plastic film. When another mounting plate 40 passes through the corroded plastic film, the corrosive liquid enters the lower sealing sleeve 6 and enters the collection box 45 through the liquid outlet pipe 46 to complete the collection.

[0040] The present invention also discloses a method for detecting a plastic film corrosion resistance detection device, the method comprising the following steps:

[0041] Step 1: When in use, place the plastic film to be tested on the top of the two lower sealing sleeves 6, then start the upper telescopic cylinder 2, the output end of the upper telescopic cylinder 2 is stretched to drive the L-shaped plate 3 to move downward, thereby causing the two upper sealing sleeves 4 to move downward, and the two upper sealing sleeves 4 move downward to press the plastic film against the top of the two lower sealing sleeves 6, start the valve, and then start the solenoid valve 44 to allow the corrosive liquid in the liquid storage tank 41 to enter an upper sealing sleeve 4 through the liquid inlet pipe 43, so that it is located above the plastic film, and at the same time, the L-shaped plate 3 moves to drive the two L-shaped rods 9 and the two right-angled triangle blocks 10 to move downward, and the two right-angled triangle blocks 10 move downward to the lower position between the pressure column 34 and the bottom plate 8;

[0042] Step 2, after the corrosive liquid has been corroded for a period of time, the lower telescopic cylinder 7 is started, and the output end of the lower telescopic cylinder 7 is stretched to drive the bottom plate 8 to move upward, thereby driving the two sliding columns 11 and the two extrusion columns 14 to move upward, and the movement of the extrusion column 14 drives the piston 38, the mounting rod 39 and the mounting plate 40 to move upward, and at this time, the moving wheels at the bottom of the two pressure plates 36 are slowly separated from the extrusion triangle plate 37, and because the four extrusion springs 25 are in a deformed state, the two moving plates 26 are brought close to each other under the action of the four extrusion springs 25, and then the two white marking tapes 28 are brought close to each other, when the moving wheels are separated from the extrusion triangle plate 37, the four extrusion springs 25 are still in a deformed state, and the two white marking tapes 28 are against the two marking pens 22, and at the same time, the moving plate 26 moves to move the vertical plate 35, the outer gear 33 and the pressure column 34, wherein the pressure column 34 is located above the right-angle triangle block 10;

[0043] Step 3, when the two mounting plates 40 continue to move and contact the plastic film, the two mounting plates 40 move to squeeze the plastic films located on the top of the two lower sealing sleeves 6 respectively. The normal plastic film is not corroded and therefore has a certain strength, so that one of the mounting plates 40 cannot move, and the mounting rod 39 and the squeezing column 14 cannot move, but the sliding column 11 and the bottom plate 8 keep moving, so that the return spring 13 is deformed, and the mounting plate 16 moves at the same time, so that the moving gear 17 rotates, and the rotation of the moving gear 17 causes the squeezing rod 18 to rotate and then squeeze the inner wall of the squeezing frame 19, so that the squeezing frame 19 and the mounting column 21 move, and the movement of the mounting column 21 drives the marking pen 22 and the bolt 23 The other corroded plastic film has a lower strength than a normal plastic film due to being corroded, so the time it squeezes the other mounting plate 40 to make it unable to move is short, so that the other squeezing column 14 moves a short distance, and the handwriting left by the other marking pen 22 on the other white marking tape 28 is short. When the other mounting plate 40 passes through the corroded plastic film, the corroded liquid enters the lower sealing sleeve 6 and enters the collecting box 45 through the liquid outlet pipe 46 to complete the collection.

[0044] Step 4, after the two markers 22 leave their marks, the output end of the lower telescopic cylinder 7 contracts, driving the two upper sealing sleeves 4, the two L-shaped rods 9 and the two right-angled triangle blocks 10 to move, and the two right-angled triangle blocks 10 squeeze the two pressure columns 34 so that the two pressure columns 34 rotate, and the two pressure columns 34 are squeezed by the inclined tops of the two right-angled triangle blocks 10 so that the two external gears 33 rotate, and when the inclined sides of the two right-angled triangle blocks 10 separate from the two pressure columns 34, the two external gears 33 no longer rotate, and the other two external gears 33 are respectively connected to the two right-angled triangle blocks 10 corresponds to the position, which is convenient for the next extrusion. During the rotation of the two outer gears 33, the two inner gears 31 and the two vertical bevel gears 32 are driven to rotate. The rotation of the two vertical bevel gears 32 drives the two horizontal bevel gears 30 to rotate. The rotation of the two horizontal bevel gears 30 drives the two rotating shafts 29 to rotate. The rotation of the two rotating shafts 29 drives the two rotating cylinders 27 to rotate, thereby rotating the two white marking tapes 28, so that the handwriting drawn by the two markers 22 moves toward the opening of the U-shaped plate 1, and then the output end of the lower telescopic cylinder 7 contracts to restore the device to its original state.

[0045] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plastic film corrosion resistance testing device, comprising a U-shaped plate (1), characterized in that: An upper telescopic cylinder (2) is fixedly mounted on the inner wall of the top side of the U-shaped plate (1); an L-shaped plate (3) is fixedly mounted on the output end of the upper telescopic cylinder (2); two L-shaped rods (9) are fixedly mounted on the side of the L-shaped plate (3); right-angled triangle blocks (10) are fixedly mounted on the bottom ends of the two L-shaped rods (9); two upper sealing sleeves (4) are fixedly mounted on the bottom of the L-shaped plate (3); a liquid inlet mechanism for feeding liquid into one of the upper sealing sleeves (4) is fixedly mounted on the vertical side of the L-shaped plate (3); two lower sealing sleeves (6) are fixedly mounted on the vertical inner wall of the U-shaped plate (1) via two connecting rods (5); The two lower sealing sleeves (6) correspond to the positions of the two upper sealing sleeves (4); a liquid outlet mechanism for discharging liquid from one of the lower sealing sleeves (6) is fixedly installed on the vertical inner wall of the U-shaped plate (1); a lower telescopic cylinder (7) is fixedly installed on the inner wall of the bottom side of the U-shaped plate (1); a bottom plate (8) is fixedly installed on the output end of the lower telescopic cylinder (7); two testing mechanisms are installed on the top of the bottom plate (8); marking mechanisms are installed on both sides of the bottom plate (8); the two marking mechanisms are respectively installed in cooperation with the two right-angle triangle blocks (10); and the two testing mechanisms are installed in cooperation with the two marking mechanisms; The testing mechanism comprises a sliding column (11) fixedly mounted on the top of the base plate (8), a sliding block (12) being slidably sleeved on the sliding column (11), an extrusion column (14) being fixedly mounted on the side of the sliding block (12), a tooth groove (15) being provided on the side of the extrusion column (14), the top end of the extrusion column (14) extending into the corresponding lower sealing sleeve (6), a piston (38) being fixedly sleeved on the extrusion column (14), the piston (38) being slidably connected to the inner wall of the lower sealing sleeve (6), a mounting rod (39) being fixedly mounted on the top end of the extrusion column (14), and a mounting plate (40) being fixedly mounted on the top end of the mounting rod (39); The testing mechanism comprises a mounting plate (16) fixedly mounted on the top of the base plate (8) and two guide rods (20); a moving gear (17) is rotatably mounted on the side of the mounting plate (16); the moving gear (17) is meshed with the tooth groove (15); an eccentrically arranged extrusion rod (18) is fixedly mounted on the side of the moving gear (17); mounting columns (21) are slidably sleeved on the two guide rods (20); an extrusion frame (19) is fixedly mounted on the side of the mounting column (21); one end of the extrusion rod (18) extends into the extrusion frame (19); a circular hole is opened on the side of the mounting column (21); a marking pen (22) is arranged in the circular hole; a threaded hole is opened on the inner wall of the top side of the circular hole; a bolt (23) is threadedly mounted in the threaded hole; the bottom end of the bolt (23) abuts against the side of the marking pen (22); The marking mechanism comprises two slide grooves opened on the vertical side of the bottom plate (8), and slide rods (24) are slidably installed in the two slide grooves. One end of the two slide rods (24) respectively extends outside the two slide grooves and is fixedly installed with a moving plate (26). The two slide rods (24) are sleeved with a pressing spring (25), and the two ends of the pressing spring (25) are respectively fixedly installed on the sides of the moving plate (26) and the bottom plate (8) close to each other. A rotating groove and a rotating hole are provided on the top of the plate (26), and a rotating shaft (29) is rotatably installed in the rotating groove and the rotating hole. The top ends of the two rotating shafts (29) extend outside the rotating groove and the rotating hole respectively and are fixedly sleeved with a rotating cylinder (27). White marking tapes (28) are stretched on the two rotating cylinders (27), and the white marking tapes (28) correspond to the positions of the marking pens (22). A rotating assembly is installed on the side of the movable plate (26) away from the bottom plate (8); The rotating assembly comprises a horizontal bevel gear (30) fixedly mounted on the bottom end of the rotating shaft (29); a vertical plate (35) is fixedly mounted on the side of the movable plate (26) away from the bottom plate (8); an inner gear (31) and an outer gear (33) meshing with each other are rotatably mounted on the side of the vertical plate (35); a vertical bevel gear (32) is fixedly mounted on the side of the inner gear (31); the vertical bevel gear (32) meshes with the horizontal bevel gear (30); three uniformly arranged pressure columns (34) are fixedly mounted on the side of the outer gear (33); the pressure columns (34) correspond to the positions of the right-angle triangle blocks (10); and a moving unit is mounted on the bottom of the vertical plate (35); The moving unit comprises a pressing plate (36) fixedly mounted on the bottom of the vertical plate (35), a moving wheel being rotatably mounted on the bottom end of the pressing plate (36), an extrusion triangular plate (37) being fixedly mounted on the inner wall of the bottom side of the U-shaped plate (1), and the moving wheel being in contact with the inclined side of the extrusion triangular plate (37).

2. A plastic film corrosion resistance testing device according to claim 1, characterized in that: The liquid outlet mechanism comprises a collecting box (45) fixedly mounted on the vertical inner wall of the U-shaped plate (1), a communicating liquid outlet pipe (46) being mounted on the side of the collecting box (45), and a top end of the liquid outlet pipe (46) being connected to a side of one of the lower sealing sleeves (6).

3. A plastic film corrosion resistance testing device according to claim 2, characterized in that: The liquid inlet mechanism comprises a liquid storage box (41) fixedly mounted on the vertical side of the L-shaped plate (3); a connected liquid inlet pipe (43) is mounted at the bottom of the liquid storage box (41); the bottom end of the liquid inlet pipe (43) is fixedly mounted on the side of one of the upper sealing sleeves (4); the liquid inlet pipe (43) is connected to the upper sealing sleeve (4); a connected air vent pipe (42) is fixedly mounted on the top of the liquid storage box (41); the bottom end of the air vent pipe (42) is fixedly connected to the side of the upper sealing sleeve (4); the air vent pipe (42) is connected to the upper sealing sleeve (4); the height of the bottom end of the air vent pipe (42) is located above the height of the bottom end of the liquid inlet pipe (43); a solenoid valve (44) is mounted on the liquid inlet pipe (43); and a valve is mounted on the air vent pipe (42).

4. A plastic film corrosion resistance testing device according to claim 3, characterized in that: The air permeable tube (42), the liquid inlet tube (43) and the collecting box (45) are located on the same side.

5. A method for detecting a plastic film corrosion resistance detection device according to any one of claims 1 to 4, characterized in that: The detection method comprises the following steps: Step 1: When in use, place the plastic film to be tested on the top of the two lower sealing sleeves (6), then start the upper telescopic cylinder (2), the output end of the upper telescopic cylinder (2) stretches to drive the L-shaped plate (3) to move downward, thereby causing the two upper sealing sleeves (4) to move downward, the two upper sealing sleeves (4) move downward to press the plastic film against the top of the two lower sealing sleeves (6), start the valve, and then start the solenoid valve (44) to allow the corrosive liquid located in the liquid storage tank (41) to enter an upper sealing sleeve (4) through the liquid inlet pipe (43), so as to be located above the plastic film, and at the same time, the L-shaped plate (3) moves to drive the two L-shaped rods (9) and the two right-angled triangle blocks (10) to move downward, and the two right-angled triangle blocks (10) move downward to be located below between the pressure column (34) and the bottom plate (8); Step 2: After the corrosive liquid has been corroded for a period of time, the lower telescopic cylinder (7) is started, and the output end of the lower telescopic cylinder (7) is stretched to drive the bottom plate (8) to move upward, thereby driving the two sliding columns (11) and the two extrusion columns (14) to move upward. The movement of the extrusion columns (14) drives the piston (38), the mounting rod (39) and the mounting plate (40) to move upward. At this time, the moving wheels at the bottom of the two pressure plates (36) are slowly separated from the extrusion triangle plate (37). Since the four extrusion springs (25) are in a deformed state, the four extrusion springs (25) are in a deformed state. Under the action of the spring (25), the two moving plates (26) are moved closer to each other, and then the two white marking strips (28) are moved closer to each other. When the moving wheel is separated from the extrusion triangle plate (37), the four extrusion springs (25) are still in a deformed state, and the two white marking strips (28) are abutted against the two marking pens (22). At the same time, the moving plate (26) moves to move the vertical plate (35), the outer gear (33) and the pressure column (34), wherein the pressure column (34) is located above the right-angle triangle block (10); Step 3: When the two mounting plates (40) continue to move and contact the plastic film, the two mounting plates (40) move to squeeze the plastic films located on the top of the two lower sealing sleeves (6) respectively. The normal plastic film is not corroded and therefore has a certain strength, so that one of the mounting plates (40) cannot move, thereby making the mounting rod (39) and the squeezing column (14) unable to move, but the sliding column (11) and the bottom plate (8) keep moving, thereby causing the return spring (13) to deform, and at the same time the mounting plate (16) moves, thereby causing the moving gear (17) to rotate, and the moving gear (17) rotates to cause the squeezing rod (18) to rotate and then squeeze the inner wall of the squeezing frame (19) to move the squeezing frame (19) and the mounting column (21), and the movement of the mounting column (21) drives the marking pen (22) and The bolt (23) moves, thereby leaving a mark moving upward on the white marking tape (28), until the mounting plate (40) penetrates the plastic film, and the extrusion column (14) is restored to its original state under the action of the return spring (13), thereby restoring the marking pen (22) to its original state. Since the other corroded plastic film has been corroded and has a lower strength than a normal plastic film, the time it spends squeezing the other mounting plate (40) to prevent it from moving is short, thereby shortening the distance that the other extrusion column (14) moves, thereby shortening the mark left by the other marking pen (22) on the other white marking tape (28). When the other mounting plate (40) penetrates the corroded plastic film, the corroded liquid enters the lower sealing sleeve (6) and enters the collection box (45) through the liquid outlet pipe (46) to complete collection; Step 4: After the two markers (22) leave their marks, the output end of the lower telescopic cylinder (7) contracts to drive the two upper sealing sleeves (4), the two L-shaped rods (9) and the two right-angled triangle blocks (10) to move. The two right-angled triangle blocks (10) squeeze the two pressure columns (34) so ​​that the two pressure columns (34) rotate. The two pressure columns (34) are squeezed by the inclined tops of the two right-angled triangle blocks (10) so that the two external gears (33) rotate. When the inclined side portions of the two right-angled triangle blocks (10) separate from the two pressure columns (34), the two external gears (33) no longer rotate. The other two external gears (33) are respectively connected to the two right-angled triangles. The position of the block (10) corresponds to that of the block (10), which is convenient for the next extrusion. During the rotation of the two outer gears (33), the two inner gears (31) and the two vertical bevel gears (32) are driven to rotate. The rotation of the two vertical bevel gears (32) drives the two horizontal bevel gears (30) to rotate. The rotation of the two horizontal bevel gears (30) drives the two rotating shafts (29) to rotate. The rotation of the two rotating shafts (29) drives the two rotating cylinders (27) to rotate, thereby causing the two white marking tapes (28) to rotate, thereby causing the handwriting drawn by the two marking pens (22) to move toward the opening of the U-shaped plate (1). Then, the output end of the lower telescopic cylinder (7) contracts to restore the device to its original state.

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