Tensile test device for PE (polyethylene) protective film

Abstract

The invention discloses a tensile testing device for a PE protective film, and relates to the technical field of tensile testing of protective films, the tensile testing device comprises a horizontal tensile testing mechanism and an opening and closing support mounted on one side of the horizontal tensile testing mechanism, and the top of the horizontal tensile testing mechanism is provided with a vertical tensile testing mechanism. The horizontal tensile testing mechanism comprises a testing base, universal wheels are fixedly installed on the periphery of the bottom of the testing base, a plurality of supporting columns are fixedly installed on the top of the testing base, a testing support is fixedly installed on the tops of the supporting columns, and a detection probe is arranged in the testing support. The opening and closing support is fixedly installed on one side of the testing support, the top and the bottom of the PE protective film are clamped and fixed through the two clamping frames under the elastic force action of the clamping springs, the friction force between the clamping frames and the PE protective film is improved through clamping holes in the clamping frames, and therefore the stretching stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of protective film stretching test, in particular to a stretching test device for PE protective film. Background Art

[0002] PE protective film is a protective film with polyethylene (PE) plastic film as the base material. It is made of acrylic resin as an adhesive and various special additives. This protective film has excellent properties, such as preventing products from being contaminated, corroded, scratched, etc. during production, processing, transportation, storage and use. Tensile performance is an important performance indicator of PE protective film. PE protective film needs to withstand tensile loads in some applications, such as packaging and covering. Tensile testing can ensure that the protective film will not break or lose its protective effect due to excessive load during use, thereby ensuring safe use.

[0003] Announcement No. CN 221056210 U discloses a tensile test device for a protective film, wherein a motor drives a screw rod to rotate, the screw rod drives a connecting block to move in a vertical direction, the connecting block drives a connecting rod to move, the connecting rod drives a connecting rod to move, and the connecting rod drives a first clamping plate to move, so that a protrusion on the first clamping plate contacts a protrusion on the second clamping plate to clamp the protective film. By setting the protrusion, the friction between the first clamping plate, the second clamping plate and the protective film is increased, so that when the protective film is clamped, the protective film is prevented from being separated from the clamping of the first pressing plate and the fixing table during the clamping process due to the smoothness of the surface of the protective film, thereby affecting the tensile test of the protective film. However, the patent still has the following problems in actual use:

[0004] Although the tensile testing device of the protective film drives the screw to rotate through the motor, the screw drives the connecting block to move in the vertical direction, the connecting block drives the connecting rod to move, the connecting rod drives the connecting rod to move, and the connecting rod drives the first clamping plate to move, so that the protrusion on the first clamping plate contacts the protrusion on the second clamping plate to clamp the protective film, but when performing the tensile test of the protective film, the clamping force cannot be adjusted according to the strength of the protective film. If the clamping is too loose, tensile slip will occur, and if the clamping is too tight, it will cause breakage at the clamping point. At the same time, it is impossible to accurately judge whether the protective film is stretched to the limit. In the prior art, accurate tensile tests can be performed through tensile testing instruments, but the quality of the instrument cannot be accurately judged. When the probe of the instrument is damaged, the test data obtained is also inaccurate, so that the accuracy of the test data cannot be guaranteed, which is not conducive to the tensile test of the PE protective film.

[0005] Therefore, a tensile testing device for PE protective film is proposed to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a tensile testing device for PE protective film, so as to solve the problem proposed in the above-mentioned background technology that when performing a tensile test on the protective film, the clamping force cannot be adjusted according to the strength of the protective film, and if the clamping is too loose, tensile slip will occur, and if the clamping is too tight, it will cause breakage at the clamping point. At the same time, it is impossible to accurately judge whether the protective film is stretched to the limit. In the prior art, accurate tensile tests can be performed by tensile testing instruments, but the quality of the instrument cannot be accurately judged. When the probe of the instrument is damaged, the test data obtained is also inaccurate, so that the accuracy of the test data cannot be guaranteed, which is not conducive to the tensile test of PE protective film.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a tensile testing device for PE protective film, comprising a horizontal tensile testing mechanism, and an opening and closing bracket installed on one side of the horizontal tensile testing mechanism;

[0008] A vertical pulling test mechanism is arranged on the top of the horizontal pulling test mechanism, and a detection probe is arranged inside the vertical pulling test mechanism;

[0009] Also includes:

[0010] The horizontal tensile test mechanism comprises a test base, universal wheels are fixedly installed around the bottom of the test base, a plurality of support columns are fixedly installed on the top of the test base, a test bracket is fixedly installed on the top of the support columns, and the opening and closing bracket is fixedly installed on one side of the test bracket;

[0011] Among them, a first motor cover is fixedly installed on one side of the test bracket, a horizontal lifting motor is fixedly installed on one side inside the first motor cover, and an output end of the horizontal lifting motor is fixedly connected to a first sprocket transmission assembly;

[0012] Among them, a first bidirectional threaded rod is symmetrically connected to one side of the first sprocket transmission assembly, and the outer sides of the two first bidirectional threaded rods are symmetrically threadedly connected to horizontal stretching threaded sleeves, and a horizontal stretching movable plate is fixedly installed on the top of the horizontal stretching threaded sleeve on one side.

[0013] Preferably, a clamping bracket is symmetrically installed on the top of the horizontal stretching movable plate, a clamping top plate is fixedly installed on the top of the clamping bracket, a clamping motor is fixedly installed on the front of the clamping top plate, an output end of the clamping motor is fixedly connected to a clamping rotating rod, first bevel gear transmission assemblies are symmetrically installed at both ends of the clamping rotating rod, and a second bidirectional threaded rod is fixedly connected to the bottom of the two first bevel gear transmission assemblies.

[0014] Preferably, the outer sides of the two second bidirectional threaded rods are symmetrically threadedly connected with clamping threaded sleeves, a first clamping plate is fixedly installed between the two clamping threaded sleeves, a clamping fixing rod is fixedly installed on the sides of the two first clamping plates close to each other, clamping springs are fixedly installed around the two first clamping plates, one side of the clamping spring is fixedly connected with a clamping frame, a plurality of clamping holes are provided inside the clamping frame, and the clamping frame is engaged and connected with the clamping fixing rod through the clamping holes.

[0015] Preferably, the first clamping plate is fixedly installed with a first support on all four sides, the first support is rotatably connected to the outer side of the first support, a clamping sliding rod is fixedly installed inside the first rotating rod, the clamping sliding rod is slidably connected to the outer side of the clamping sliding rod, and a compression spring is fixedly connected to one side of the clamping sliding sleeve.

[0016] Preferably, the outer side of the clamping sliding sleeve is rotatably connected to a connecting rotating rod, the end of the connecting rotating rod is rotatably connected to a second support, the second support is fixedly connected to the clamping frame, the end of the first rotating rod away from the first support is fixedly connected to a fixed support, and a second clamping plate is fixedly installed on the bottom of the fixed support.

[0017] Preferably, a second motor cover is fixedly installed on the front side of the opening and closing bracket, an opening and closing motor is fixedly installed on one side of the inner side of the second motor cover, an output end of the opening and closing motor is fixedly connected to a second sprocket transmission assembly, a third bidirectional threaded rod is symmetrically connected to one side of the second sprocket transmission assembly, the outer sides of the two third bidirectional threaded rods are symmetrically threaded with opening and closing threaded sleeves, and an opening and closing plate is fixedly installed on the top of the two opening and closing threaded sleeves.

[0018] Preferably, the inner sides of the two opening and closing plates are rotatably connected with fixed sleeves, a winding motor is fixedly installed on the outer side of the opening and closing plates on one side, the output end of the winding motor is fixedly connected to the fixed sleeve, the interiors of the two fixed sleeves are snap-connected with snap blocks, a winding roller is fixedly connected between the two snap blocks, and a control panel is fixedly installed on the front of the test bracket.

[0019] Preferably, the vertical pulling test mechanism includes a movable slide rail, which is symmetrically arranged on the front and rear sides of the test bracket, a first lifting bracket is fixedly installed on the top of the two movable slide rails, a lifting top plate is fixedly installed on the top of the first lifting bracket, a lifting motor is fixedly installed on the front of the lifting top plate, the output end of the lifting motor is fixedly connected to a lifting rotating rod, second bevel gear transmission assemblies are symmetrically installed at both ends of the lifting rotating rod, two lifting threaded rods are fixedly connected to the bottom of the two second bevel gear transmission assemblies, the outer sides of the two lifting threaded rods are threadedly connected with lifting threaded sleeves, a second lifting bracket is fixedly installed between the two lifting threaded sleeves, and a lifting fixed rod is fixedly installed at the bottom center of the second lifting bracket.

[0020] Preferably, the bottom of the lifting and fixing rod is fixedly connected to a wind cylinder, the bottom of the wind cylinder is fixedly connected to a connecting pipe, the bottom of the connecting pipe is fixedly installed with a collecting box, the bottom of the collecting box is fixedly connected to an air outlet pipe, the bottom of the air outlet pipe is fixedly connected to a detection probe, a fixed block is fixedly installed on the inner side of the bottom of the air outlet pipe, a through hole is opened inside the fixed block, an air inlet pipe is fixedly installed on one side of the wind cylinder, a sealing block is threadedly connected to the outer side of the air inlet pipe, a rotating motor is fixedly installed at the top center position of the wind cylinder, the output end of the rotating motor is fixedly connected to rotating fan blades, the bottom of the rotating fan blades is fixedly connected to a rotating connecting rod, a tripod is symmetrically installed on the outer side of the rotating connecting rod, and a plurality of spiral blades are fixedly connected between the two tripods.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the stretching test device for PE protective film uses the elastic force of the clamping spring to enable two clamping frames to clamp and fix the top and bottom of the PE protective film, and the friction between the clamping frame and the PE protective film is increased by the clamping holes inside the clamping frame, thereby improving the stretching stability. When colored gas appears at the bottom of the PE protective film, it can accurately determine that the PE protective film has been stretched and broken, and can assist the stretching detection device to perform the stretching test of the PE protective film, thereby avoiding the phenomenon that the stretching detection device is damaged or some parts fail, which affects the accuracy of the PE protective film stretching test data. The specific contents are as follows:

[0022] 1. By setting up a horizontal tensile test mechanism, not only can the horizontal pulling motor be used to drive the first sprocket transmission assembly and the first bidirectional threaded rod to rotate, so that the two horizontal tensile threaded sleeves move relatively on the outside of the first bidirectional threaded rod, but also drive the horizontal tensile movable plate, the clamping bracket and the clamping top plate to move relatively. At the same time, the clamping motor is used to drive the clamping rotating rod and the first bevel gear transmission assembly to rotate, and the second bidirectional threaded rod is driven to rotate by the first bevel gear transmission assembly, so that the two clamping threaded sleeves drive the first clamping plate to move relatively. The elastic force of the clamping spring is used to clamp and fix the top and bottom of the PE protective film. The friction between the clamping frame and the PE protective film is increased by the clamping holes inside the clamping frame, thereby improving the stability of the stretching. When the PE protective film is relatively fragile, the clamping holes inside the clamping frame are prevented from damaging the PE protective film during stretching. By adjusting the distance between the two first clamping plates, the first clamping plate drives the clamping fixing rod to extend into the clamping hole. The inside of the PE protective film is sealed, and the clamping force is increased while the surface of the clamping frame can be kept flat, thereby improving the tensile stability. When the strength and thickness of the PE protective film are relatively high, the clamping frame is continuously squeezed, so that the clamping frame drives the second support and the connecting rotating rod to move, so that the clamping sliding sleeve slides on the outside of the clamping sliding rod while squeezing the compression spring, so that the first rotating rod rotates around the first support, and the second clamping plate at the bottom of the fixed support is used to clamp and fix the surface of the PE protective film, and the clamping area is increased to improve the clamping stability, thereby facilitating the tensile test of the PE protective film, and the second sprocket transmission assembly and the third bidirectional threaded rod are driven to rotate by the opening and closing motor, so that the opening and closing threaded sleeves on both sides drive the opening and closing plate and the fixed sleeve to move relatively, and the characteristics of the fixed sleeve and the clamping block are used to realize the rapid installation and disassembly of the winding roller, and the wound PE protective film can be randomly tested without cutting the PE protective film, thereby improving the detection efficiency of the PE protective film;

[0023] 2. By setting up the vertical pulling test mechanism, not only can the movable slide rail be used to realize the arbitrary movement of the first lifting bracket and the lifting top plate, but also the lifting motor drives the lifting rotating rod to rotate, so that the second bevel gear transmission assembly drives the lifting threaded rod to rotate, and the lifting threaded sleeve drives the second lifting bracket and the lifting fixed rod to move up and down, so as to move the detection probe to the top of the PE protective film, thereby performing vertical pulling detection on the PE protective film, and opening the blocking block and injecting colored gas into the inside of the air intake pipe, driving the rotating fan blades to rotate by the rotating motor, and driving the tripod and the spiral blades to rotate by the rotating connecting rod, the colored gas can be discharged from the inside of the detection probe through the through hole inside the fixed block. When colored gas appears at the bottom of the PE protective film, it can accurately determine that the PE protective film has been stretched and ruptured, and can assist the stretching detection device in performing the stretching test of the PE protective film, so as to avoid damage to the stretching detection device or failure of some parts, which affects the accuracy of the stretching test data of the PE protective film. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the horizontal tensile testing mechanism in the present invention;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the clamping bracket and the clamping top plate in the present invention;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the first clamping plate in the present invention;

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the clamping frame in the present invention;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the first rotating rod in the present invention;

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the opening and closing plate in the present invention;

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of the winding roller in the present invention;

[0032] Fig. 9 It is a schematic diagram of the three-dimensional structure of the vertical pulling test mechanism in the present invention;

[0033] Fig.10 It is a schematic diagram of the three-dimensional structure of the second lifting bracket in the present invention;

[0034] Fig.11 It is a schematic diagram of the three-dimensional structure of the cross section of the air duct and the collection box in the present invention.

[0035] In the figure: 1, horizontal stretch test mechanism; 101, test base; 102, universal wheel; 103, support column; 104, test bracket; 105, opening and closing bracket; 106, first motor cover; 107, horizontal lifting motor; 108, first sprocket transmission assembly; 109, first bidirectional threaded rod; 110, horizontal stretch threaded sleeve; 111, horizontal stretch moving plate; 112, clamping bracket; 113, clamping top plate; 114, clamping motor; 115, clamping rotating rod; 11 6. First bevel gear transmission assembly; 117. Second bidirectional threaded rod; 118. Clamping thread sleeve; 119. First clamping plate; 120. Clamping fixed rod; 121. Clamping spring; 122. Clamping frame; 123. Clamping hole; 124. First support; 125. First rotating rod; 126. Clamping sliding rod; 127. Clamping sliding sleeve; 128. Compression spring; 129. Connecting rotating rod; 130. Second support; 131. Fixed support; 132. Second clamping plate; 1 33. Second motor cover; 134. Opening and closing motor; 135. Second sprocket transmission assembly; 136. Third bidirectional threaded rod; 137. Opening and closing threaded sleeve; 138. Opening and closing plate; 139. Fixed sleeve; 140. Winding motor; 141. Winding roller; 142. Clamping block; 143. Control panel; 2. Vertical pulling test mechanism; 201. Moving slide rail; 202. First lifting bracket; 203. Lifting top plate; 204. Lifting motor; 205. Lifting rotating rod; 206. The second bevel gear transmission assembly; 207, lifting threaded rod; 208, lifting threaded sleeve; 209, second lifting bracket; 210, lifting fixing rod; 211, air cylinder; 212, connecting pipe; 213, collecting box; 214, air outlet pipe; 215, detection probe; 216, fixing block; 217, through hole; 218, air inlet pipe; 219, blocking block; 220, rotating motor; 221, rotating fan blades; 222, rotating connecting rod; 223, tripod; 224, spiral blades. DETAILED DESCRIPTION

[0036] 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 implementation regulations described 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.

[0037] See also Figure 1-Figure 11The present invention provides a technical solution: a tensile test device for a PE protective film, comprising a horizontal tensile test mechanism 1, and an opening and closing bracket 105 installed on one side of the horizontal tensile test mechanism 1, a vertical pulling test mechanism 2 is arranged on the top of the horizontal tensile test mechanism 1, and a detection probe 215 is arranged inside the vertical pulling test mechanism 2, the horizontal tensile test mechanism 1 comprises a test base 101, universal wheels 102 are fixedly installed around the bottom of the test base 101, a plurality of support columns 103 are fixedly installed on the top of the test base 101, a test bracket 104 is fixedly installed on the top of the support column 103, and the opening and closing bracket 105 is fixedly installed on one side of the test bracket 104, wherein the test bracket 104 A first motor cover 106 is fixedly installed on one side, a horizontal lifting motor 107 is fixedly installed on one side inside the first motor cover 106, and the output end of the horizontal lifting motor 107 is fixedly connected to a first sprocket transmission assembly 108, wherein a first bidirectional threaded rod 109 is symmetrically connected to one side of the first sprocket transmission assembly 108, and the outer sides of the two first bidirectional threaded rods 109 are symmetrically threadedly connected to horizontal stretching threaded sleeves 110, a horizontal stretching movable plate 111 is fixedly installed on the top of one side of the horizontal stretching threaded sleeve 110, a clamping bracket 112 is symmetrically installed on the top of the horizontal stretching movable plate 111, a clamping top plate 113 is fixedly installed on the top of the clamping bracket 112, and a clamping top plate 113 is fixedly installed on the front side of the clamping top plate 113 Motor 114, the output end of the clamping motor 114 is fixedly connected with a clamping rotating rod 115, the two ends of the clamping rotating rod 115 are symmetrically installed with first bevel gear transmission components 116, the bottoms of the two first bevel gear transmission components 116 are fixedly connected with second bidirectional threaded rods 117, the outer sides of the two second bidirectional threaded rods 117 are symmetrically threaded with clamping threaded sleeves 118, a first clamping plate 119 is fixedly installed between the two clamping threaded sleeves 118, a clamping fixed rod 120 is fixedly installed on the side of the two first clamping plates 119 close to each other, a clamping spring 121 is fixedly installed around the two first clamping plates 119, and a clamping frame 122 is fixedly connected to one side of the clamping spring 121. The horizontal lifting motor 107 drives the first sprocket transmission assembly 108 and the first bidirectional threaded rod 109 to rotate, so that the two horizontal stretching threaded sleeves 110 move relative to each other on the outside of the first bidirectional threaded rod 109, while driving the horizontal stretching movable plate 111, the clamping bracket 112 and the clamping top plate 113 to move relative to each other. At the same time, the clamping motor 114 is used to drive the clamping rotating rod 115 and the first bevel gear transmission assembly 116 to rotate, and the second bidirectional threaded rod 117 is driven to rotate through the first bevel gear transmission assembly 116, so that the two clamping threaded sleeves 118 drive the first clamping plate 119 to move relative to each other, and the elastic force of the clamping spring 121 is used to clamp and fix the top and bottom of the PE protective film.

[0038] A plurality of clamping holes 123 are provided inside the clamping frame 122, and the clamping frame 122 is connected to the clamping fixed rod 120 through the clamping holes 123. The first clamping plate 119 is fixedly installed with a first support 124 on all sides, and the first support 124 is rotatably connected to the outside of the first support 124. A clamping sliding rod 126 is fixedly installed inside the first rotating rod 125, and a clamping sliding sleeve 127 is slidably connected to the outside of the clamping sliding rod 126. A compression spring is fixedly connected to one side of the clamping sliding sleeve 127. The outer side of the clamping sliding sleeve 127 is rotatably connected to a connecting rotating rod 129, and the end of the connecting rotating rod 129 is rotatably connected to a second support 130, and the second support 130 is fixedly connected to the clamping frame 122. The end of the first rotating rod 125 away from the first support 124 is fixedly connected to a fixed support 131, and a second clamping plate 132 is fixedly installed at the bottom of the fixed support 131, and the friction between the clamping frame 122 and the PE protective film is improved through the clamping hole 123 inside the clamping frame 122. The friction force is increased, thereby improving the stability of stretching. When the PE protective film is relatively fragile, the clamping hole 123 inside the clamping frame 122 is prevented from damaging the PE protective film during stretching. By adjusting the distance between the two first clamping plates 119, the first clamping plate 119 drives the clamping fixing rod 120 to extend into the clamping hole 123 for blocking. While increasing the clamping force, the surface of the clamping frame 122 can be kept smooth, thereby improving the stability of stretching. When the strength and thickness of the PE protective film are relatively high, the film can continue to be squeezed. The clamping frame 122 is pressed so that the clamping frame 122 drives the second support 130 and the connecting rotating rod 129 to move, so that the clamping sliding sleeve 127 slides on the outer side of the clamping sliding rod 126 while squeezing the compression spring 128, so that the first rotating rod 125 rotates around the first support 124, and the surface of the PE protective film is clamped and fixed by the second clamping plate 132 at the bottom of the fixed support 131. By increasing the clamping area, the clamping stability is improved, thereby facilitating the tensile test of the PE protective film.

[0039] A second motor cover 133 is fixedly installed on the front of the opening and closing bracket 105, an opening and closing motor 134 is fixedly installed on one side of the inner part of the second motor cover 133, an output end of the opening and closing motor 134 is fixedly connected to a second sprocket transmission assembly 135, a third bidirectional threaded rod 136 is symmetrically connected to one side of the second sprocket transmission assembly 135, the outer sides of the two third bidirectional threaded rods 136 are symmetrically threaded with opening and closing threaded sleeves 137, an opening and closing plate 138 is fixedly installed on the top of the two opening and closing threaded sleeves 137, the inner sides of the two opening and closing plates 138 are rotatably connected with a fixed sleeve 139, a winding motor 140 is fixedly installed on the outer side of one opening and closing plate 138, and the output end of the winding motor 140 is connected to the fixed sleeve 139 The two fixing sleeves 139 are fixedly connected, and the insides of the two fixing sleeves 139 are both snap-fitted with snap-fit ​​blocks 142, and a winding roller 141 is fixedly connected between the two snap-fit ​​blocks 142. A control panel 143 is fixedly installed on the front of the test bracket 104. The second sprocket transmission assembly 135 and the third bidirectional threaded rod 136 are driven to rotate by the opening and closing motor 134, so that the opening and closing threaded sleeves 137 on both sides drive the opening and closing plates 138 and the fixing sleeves 139 to move relative to each other. By utilizing the snap-fitting connection between the fixing sleeves 139 and the snap-fit ​​blocks 142, the winding roller 141 can be quickly installed and disassembled, and the rolled PE protective film can be randomly tested without cutting the PE protective film, thereby improving the detection efficiency of the PE protective film.

[0040] The vertical pulling test mechanism 2 includes a movable slide rail 201, which is symmetrically arranged on the front and rear sides of the test bracket 104. The first lifting bracket 202 is fixedly installed on the top of the two movable slide rails 201, and a lifting top plate 203 is fixedly installed on the top of the first lifting bracket 202. A lifting motor 204 is fixedly installed on the front of the lifting top plate 203. The output end of the lifting motor 204 is fixedly connected to a lifting rotating rod 205, and the two ends of the lifting rotating rod 205 are symmetrically installed with second bevel gear transmission assemblies 206. The bottoms of the two second bevel gear transmission assemblies 206 are fixedly connected to lifting threaded rods 207, and the outer sides of the two lifting threaded rods 207 are threadedly connected There is a lifting threaded sleeve 208, and a second lifting bracket 209 is fixedly installed between the two lifting threaded sleeves 208. A lifting fixed rod 210 is fixedly installed at the bottom center of the second lifting bracket 209. The movable slide rail 201 is used to realize the arbitrary movement of the first lifting bracket 202 and the lifting top plate 203. At the same time, the lifting motor 204 drives the lifting rotating rod 205 to rotate, so that the second bevel gear transmission assembly 206 drives the lifting threaded rod 207 to rotate. At the same time, the lifting threaded sleeve 208 drives the second lifting bracket 209 and the lifting fixed rod 210 to move up and down, and the detection probe 215 is moved to the top of the PE protective film, so as to perform vertical pulling detection on the PE protective film.

[0041] The bottom of the lifting fixed rod 210 is fixedly connected with a wind tube 211, the bottom of the wind tube 211 is fixedly connected with a connecting pipe 212, the bottom of the connecting pipe 212 is fixedly installed with a collecting box 213, the bottom of the collecting box 213 is fixedly connected with an air outlet pipe 214, the bottom of the air outlet pipe 214 is fixedly connected with a detection probe 215, a fixing block 216 is fixedly installed on the inner side of the bottom of the air outlet pipe 214, a through hole 217 is opened inside the fixing block 216, an air inlet pipe 218 is fixedly installed on one side of the wind tube 211, and a blocking block 219 is threadedly connected to the outer side of the air inlet pipe 218, a rotating motor 220 is fixedly installed at the top center position of the wind tube 211, the output end of the rotating motor 220 is fixedly connected with a rotating fan blade 221, the bottom of the rotating fan blade 221 is fixedly connected with a rotating connecting rod 222, and the rotating connecting rod A tripod 223 is symmetrically installed on the outer side of 222, and a plurality of spiral blades 224 are fixedly connected between the two tripods 223. By opening the blocking block 219 and injecting colored gas into the interior of the air inlet pipe 218, the rotating motor 220 drives the rotating fan blade 221 to rotate, and the rotating connecting rod 222 drives the tripod 223 and the spiral blade 224 to rotate, the colored gas can be discharged from the interior of the detection probe 215 through the through hole 217 inside the fixed block 216. When colored gas appears at the bottom of the PE protective film, it can accurately determine that the PE protective film has been stretched and ruptured, and can assist the stretching detection device to perform a stretching test on the PE protective film, thereby avoiding damage to the stretching detection device or malfunction of some parts, which affects the accuracy of the stretching test data of the PE protective film.

[0042] Working principle: Before using this tensile test device for PE protective film, you need to check the overall condition of the device to make sure it can work normally. Figure 1 - Fig.11As shown, first, the second sprocket transmission assembly 135 and the third bidirectional threaded rod 136 are driven to rotate by the opening and closing motor 134, so that the opening and closing threaded sleeves 137 on both sides drive the opening and closing plate 138 and the fixed sleeve 139 to move relatively. By utilizing the characteristics of the fixed sleeve 139 being engaged and connected with the engaging block 142, the winding roller 141 can be quickly installed and disassembled, and the wound PE protective film can be randomly tested without cutting the PE protective film, thereby improving the detection efficiency of the PE protective film. The horizontal pulling motor 107 is used to drive the first sprocket transmission assembly 108 and the first bidirectional threaded rod 109 to rotate, so that the two horizontal stretching threaded sleeves 110 move relatively on the outside of the first bidirectional threaded rod 109, while driving the horizontal stretching movable plate 111, the clamping plate 112 and the clamping plate 113. The holding bracket 112 and the clamping top plate 113 move relative to each other, and the clamping motor 114 is used to drive the clamping rotating rod 115 and the first bevel gear transmission assembly 116 to rotate, and the second bidirectional threaded rod 117 is driven to rotate through the first bevel gear transmission assembly 116, so that the two clamping threaded sleeves 118 drive the first clamping plate 119 to move relative to each other, and the elastic force of the clamping spring 121 is used to clamp and fix the top and bottom of the PE protective film. The friction between the clamping frame 122 and the PE protective film is increased by the clamping hole 123 inside the clamping frame 122, thereby improving the stretching stability. When the PE protective film is relatively fragile, the clamping hole 123 inside the clamping frame 122 is prevented from damaging the PE protective film during stretching.

[0043] Secondly, by adjusting the distance between the two first clamping plates 119, the first clamping plate 119 drives the clamping fixing rod 120 to extend into the interior of the clamping hole 123 for sealing, thereby increasing the clamping force while maintaining the flatness of the surface of the clamping frame 122 and improving the tensile stability. When the strength and thickness of the PE protective film are relatively high, the clamping frame 122 is continuously squeezed so that the clamping frame 122 drives the second support 130 and the connecting rotating rod 129 to move, so that the clamping sliding sleeve 127 slides on the outside of the clamping sliding rod 126 while squeezing the compression spring 128, so that the first rotating rod 125 rotates around the first support 124, and the second clamping plate 132 at the bottom of the fixed support 131 is used to clamp and fix the surface of the PE protective film. By increasing the clamping area, the clamping stability is improved, thereby facilitating the tensile test of the PE protective film.

[0044] Finally, the movable slide rail 201 is used to realize the arbitrary movement of the first lifting bracket 202 and the lifting top plate 203. At the same time, the lifting motor 204 drives the lifting rotating rod 205 to rotate, so that the second bevel gear transmission assembly 206 drives the lifting threaded rod 207 to rotate. At the same time, the lifting threaded sleeve 208 drives the second lifting bracket 209 and the lifting fixed rod 210 to move up and down, and the detection probe 215 is moved to the top of the PE protective film, so as to perform vertical lifting detection on the PE protective film. By opening the blocking block 219 and injecting colored gas into the interior of the air inlet pipe 218, the detection probe 215 is moved to the top of the PE protective film. By rotating the motor 220 to drive the rotating blade 221 to rotate, and at the same time using the rotating connecting rod 222 to drive the tripod 223 and the spiral blade 224 to rotate, the colored gas can be discharged from the inside of the detection probe 215 through the through hole 217 inside the fixed block 216. When colored gas appears at the bottom of the PE protective film, it can be accurately determined that the PE protective film has been stretched and ruptured, and the stretching detection device can be assisted to perform a stretching test on the PE protective film, thereby avoiding damage to the stretching detection device or malfunction of some parts, which affects the accuracy of the PE protective film stretching test data.

[0045] 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 tensile testing device for a PE protective film, comprising a horizontal tensile testing mechanism (1), and an opening and closing bracket (105) installed on one side of the horizontal tensile testing mechanism (1); A vertical pulling test mechanism (2) is arranged on the top of the horizontal pulling test mechanism (1), and a detection probe (215) is arranged inside the vertical pulling test mechanism (2); It is characterized in that Also includes: The horizontal tensile testing mechanism (1) comprises a testing base (101), universal wheels (102) are fixedly mounted around the bottom of the testing base (101), a plurality of supporting columns (103) are fixedly mounted on the top of the testing base (101), a testing bracket (104) is fixedly mounted on the top of the supporting columns (103), and the opening and closing bracket (105) is fixedly mounted on one side of the testing bracket (104); Wherein, a first motor cover (106) is fixedly installed on one side of the test bracket (104), a horizontal lifting motor (107) is fixedly installed on one side inside the first motor cover (106), and an output end of the horizontal lifting motor (107) is fixedly connected to a first sprocket transmission assembly (108); Among them, one side of the first sprocket transmission assembly (108) is symmetrically connected to a first bidirectional threaded rod (109), the outer sides of the two first bidirectional threaded rods (109) are symmetrically threadedly connected to a horizontal stretching threaded sleeve (110), and a horizontal stretching movable plate (111) is fixedly installed on the top of the horizontal stretching threaded sleeve (110) on one side.

2. A tensile testing device for PE protective film according to claim 1, characterized in that: A clamping bracket (112) is symmetrically mounted on the top of the horizontal stretching movable plate (111), a clamping top plate (113) is fixedly mounted on the top of the clamping bracket (112), a clamping motor (114) is fixedly mounted on the front of the clamping top plate (113), an output end of the clamping motor (114) is fixedly connected to a clamping rotating rod (115), first bevel gear transmission assemblies (116) are symmetrically mounted on both ends of the clamping rotating rod (115), and the bottoms of the two first bevel gear transmission assemblies (116) are fixedly connected to second bidirectional threaded rods (117).

3. A tensile testing device for PE protective film according to claim 2, characterized in that: The outer sides of the two second bidirectional threaded rods (117) are symmetrically threadedly connected with clamping threaded sleeves (118) in an upper and lower manner, and a first clamping plate (119) is fixedly installed between the two clamping threaded sleeves (118). A clamping fixing rod (120) is fixedly installed on the sides of the two first clamping plates (119) close to each other, and clamping springs (121) are fixedly installed around the two first clamping plates (119). A clamping frame (122) is fixedly connected to one side of the clamping spring (121), and a plurality of clamping holes (123) are provided inside the clamping frame (122). The clamping frame (122) is snap-fitted and connected with the clamping fixing rod (120) through the clamping holes (123).

4. A tensile testing device for PE protective film according to claim 3, characterized in that: The first clamping plate (119) is fixedly mounted with a first support (124) on all four sides; the first support (124) is rotatably connected to a first rotating rod (125) on the outer side; a clamping sliding rod (126) is fixedly mounted inside the first rotating rod (125); the clamping sliding rod (126) is slidably connected to a clamping sliding sleeve (127) on the outer side; and a compression spring (128) is fixedly connected to one side of the clamping sliding sleeve (127).

5. A tensile testing device for PE protective film according to claim 4, characterized in that: The outer side of the clamping sliding sleeve (127) is rotatably connected to a connecting rotating rod (129), and the end of the connecting rotating rod (129) is rotatably connected to a second support (130). The second support (130) is fixedly connected to the clamping frame (122). The end of the first rotating rod (125) away from the first support (124) is fixedly connected to a fixed support (131), and a second clamping plate (132) is fixedly installed on the bottom of the fixed support (131).

6. A tensile testing device for PE protective film according to claim 5, characterized in that: A second motor cover (133) is fixedly mounted on the front of the opening and closing bracket (105); an opening and closing motor (134) is fixedly mounted on one side of the interior of the second motor cover (133); an output end of the opening and closing motor (134) is fixedly connected to a second sprocket transmission assembly (135); a third bidirectional threaded rod (136) is symmetrically connected to one side of the second sprocket transmission assembly (135); the outer sides of the two third bidirectional threaded rods (136) are symmetrically threadedly connected to opening and closing threaded sleeves (137); and an opening and closing plate (138) is fixedly mounted on the tops of the two opening and closing threaded sleeves (137).

7. A tensile testing device for PE protective film according to claim 6, characterized in that: The inner sides of the two opening and closing plates (138) are rotatably connected with a fixing sleeve (139), a winding motor (140) is fixedly installed on the outer side of the opening and closing plates (138) on one side, the output end of the winding motor (140) is fixedly connected to the fixing sleeve (139), the interiors of the two fixing sleeves (139) are snap-fitted with snap-fit ​​blocks (142), a winding roller (141) is fixedly connected between the two snap-fit ​​blocks (142), and a control panel (143) is fixedly installed on the front side of the test bracket (104).

8. A tensile testing device for PE protective film according to claim 1, characterized in that: The vertical pulling test mechanism (2) comprises a movable slide rail (201), wherein the movable slide rail (201) is symmetrically arranged on the front and rear sides of the test bracket (104), and a first lifting bracket (202) is fixedly installed on the top of the two movable slide rails (201), and a lifting top plate (203) is fixedly installed on the top of the first lifting bracket (202), and a lifting motor (204) is fixedly installed on the front of the lifting top plate (203), and the output end of the lifting motor (204) is fixedly connected to the lifting rotating rod (2 05), the two ends of the lifting and rotating rod (205) are symmetrically installed with second bevel gear transmission assemblies (206), the bottoms of the two second bevel gear transmission assemblies (206) are fixedly connected with lifting threaded rods (207), the outer sides of the two lifting threaded rods (207) are threadedly connected with lifting threaded sleeves (208), a second lifting bracket (209) is fixedly installed between the two lifting threaded sleeves (208), and a lifting fixed rod (210) is fixedly installed at the bottom center of the second lifting bracket (209).

9. A tensile testing device for PE protective film according to claim 8, characterized in that: The bottom of the lifting and fixing rod (210) is fixedly connected to a wind tube (211), the bottom of the wind tube (211) is fixedly connected to a connecting pipe (212), the bottom of the connecting pipe (212) is fixedly installed with a collecting box (213), the bottom of the collecting box (213) is fixedly connected to an air outlet pipe (214), the bottom of the air outlet pipe (214) is fixedly connected to a detection probe (215), a fixing block (216) is fixedly installed on the inner side of the bottom of the air outlet pipe (214), a through hole (217) is provided inside the fixing block (216), and the wind tube (211) is fixedly connected to a connecting pipe (212). ) is fixedly mounted on one side of the air intake pipe (218), the outer side of the air intake pipe (218) is threadedly connected to a blocking block (219), a rotating motor (220) is fixedly mounted at the top center of the air cylinder (211), the output end of the rotating motor (220) is fixedly connected to a rotating fan blade (221), the bottom of the rotating fan blade (221) is fixedly connected to a rotating connecting rod (222), a tripod (223) is symmetrically mounted on the outer side of the rotating connecting rod (222), and a plurality of spiral blades (224) are fixedly connected between the two tripods (223).

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