A tensile strength detection device for ground film production

Abstract

The present invention relates to the field of ground film production detection technology, and specifically to a stretch detection device for ground film production. It includes: a fixed frame, the fixed frame is slidably connected to a sliding plate; a first sliding block is slidably connected to the sliding plate, and a first spring is installed between the two, the first sliding block is installed with a first electric shaft, the first electric shaft is slidably connected to the first sliding frame, and a second spring is installed between the two, the first sliding frame is fixed with a first fixed block, and the first fixed block is slidably connected to the second fixed block; a plurality of electric rollers are symmetrically distributed and respectively installed on the first fixed block and the second fixed block. The present invention uses two electric rollers to rotate in opposite directions to drag the film upward as a whole, so that different positions of the film are subjected to equal upward force, and then automatically adjust the flatness of the film to maintain the accuracy of the film tensile test.

Description

Technical Field

[0001] The invention relates to the technical field of ground film production detection, and in particular to a stretching degree detection device for ground film production. Background Art

[0002] After the mulch is produced, it is necessary to take the scraps of the mulch for tensile testing, so as to obtain data such as the tensile limit of the mulch of this batch. A film tensile testing machine is usually required for tensile testing of the mulch. The film tensile testing machine clamps the two ends of the film with two clamps respectively, and then the upper clamp drags the film upward at a stable speed. By installing a tensile sensor on the upper clamp, the tension and elongation distance of the film when it undergoes uniform deformation, irreversible deformation and breaking are recorded, so as to obtain various tensile data of the film. This is because when the existing film tensile testing machine stretches the film, it is necessary to ensure that the film is initially in a flat and vertical state, so as to ensure that the film is subjected to force according to the test standards, and thus to ensure the accuracy of the test results. The existing clamps cannot automatically correct the flatness and vertical state of the clamped film. If the film is in an uneven state when stretched, or the position of the film is skewed, the test data will lose accuracy, thereby affecting the test results of different batches of mulch. Summary of the invention

[0003] In order to overcome the shortcoming that the existing film tensile testing machine cannot automatically correct the flatness and verticality of the film thereon, the present invention provides a tensile strength detection device for ground film production.

[0004] The technical implementation scheme of the present invention is: a stretching degree detection device for ground film production, comprising: a fixed frame, on which a winding roller is installed, the fixed frame is slidably connected to a sliding plate, the winding roller is wound with a drag rope fixed to the sliding plate; a first sliding block, slidably connected to the sliding plate, and a first spring is installed between the two, the first sliding block is installed with a first electric shaft, the first electric shaft is slidably connected to a first sliding frame, and a second spring is installed between the two, the first sliding frame is fixed to a first fixed block, and the first fixed block is slidably connected to a second fixed block; a plurality of electric rollers are symmetrically distributed and respectively installed on the first fixed block and the second fixed block; a clamping mechanism is arranged at the lower part of the fixed frame, for clamping the lower part of the film.

[0005] More preferably, the clamping mechanism includes: a second sliding block, slidably connected to the lower part of the fixed frame, and a third spring is installed between the two, the second sliding block is installed with a second electric shaft, the second electric shaft is slidably connected to the second sliding frame, and a fourth spring is installed between the two, and the second sliding frame is slidably connected to the clamping plate; a swinging component, arranged between the first electric shaft and the second electric shaft, for swinging the film to a vertical state; a positioning component, having at least two, which are respectively arranged on the first electric shaft and the second electric shaft, for positioning the longitudinal center line of the film.

[0006] More preferably, the first fixed block and the second sliding frame are both rotatably connected to a locking piece, the locking piece is provided with a slide groove, the slide groove consists of an inclined groove and an arc groove, the arc groove and the axis of the locking piece are perpendicular to each other, and the second fixed block and the clamping plate are both limitedly matched with the slide groove on the adjacent locking piece.

[0007] More preferably, the swing assembly includes: a limit plate, rotatably connected to the second electric shaft, the limit plate and the first electric shaft are limited and slidably connected; a first electromagnetic limiter, fixedly connected to the first sliding block, the first electromagnetic limiter and the limit plate are limited, and a second electromagnetic limiter is fixedly connected to the side of the limit plate close to the second electric shaft, and the second electromagnetic limiter and the second sliding frame are limited.

[0008] More preferably, the positioning assembly includes: an X-shaped frame, rotatably connected to the first electric shaft or the second electric shaft, the X-shaped frame is equipped with an electric push rod, the X-shaped frame is equipped with symmetrically distributed fixed slide rails, the fixed slide rails are slidably connected with mounting parts, and the mounting parts are slidably connected to the adjacent first sliding frame or the adjacent second sliding frame; first pressure detectors, the same number as the mounting parts, are installed on adjacent mounting parts; electromagnets, the same number as the mounting parts, are installed on adjacent mounting parts, the fixed frame and the sliding plate are both fixedly connected to fixed plates, the electromagnets are magnetically matched with the adjacent fixed plates, the mounting parts are equipped with a third electromagnetic limiter, the second sliding frame and the first sliding frame are both limited by the adjacent third electromagnetic limiter; a measuring component, the mounting part arranged on the second sliding frame, is used to measure whether the film is rotated to a vertical state.

[0009] More preferably, a line connecting two adjacent first pressure detectors on the first sliding frame intersects with the central axis of the first electric shaft, and a line connecting two adjacent first pressure detectors on the second sliding frame intersects with the central axis of the second electric shaft.

[0010] More preferably, the detection head of the first pressure detector is bullet-shaped, and the axis of the detection head of the first pressure detector is located between the second sliding frame and the clamping plate, the extended surface of the second sliding frame close to the clamping plate intersects with the outer surface of the electric roller on the first fixed block, and the intersection line is only a straight line.

[0011] More preferably, the measuring component includes: a detection frame having two symmetrically distributed ones, which are rotatably connected to the adjacent mounting parts on the second sliding frame, and the fixed frame is fixed with a bracket slidably connected to the detection frame; detection columns, the number of which is the same as the detection frames, are respectively arranged on adjacent detection frames, and a second pressure detector is installed on the side of the detection column away from the detection frame, and the detection head of the second pressure detector is a straight plate type.

[0012] More preferably, a micro-electric rotating shaft is installed on the detection frame, the micro-electric rotating shaft is fixedly connected to the detection column, and the detection frame is rotatably connected to the detection column.

[0013] More preferably, it also includes: an auxiliary clamping mechanism, which is arranged on the sliding plate and is used to clamp the upper part of the film when pulling the film, and the auxiliary clamping mechanism includes: a fixed frame, which is fixed to the sliding plate and is located at the lower side of the first sliding frame; an electromagnetic clamping block, which is fixed to the fixed frame; a clamping block, which is slidably connected to the fixed frame, and a fifth spring is fixed between the two, and the clamping block is magnetically matched with the electromagnetic clamping block.

[0014] Compared with the prior art, the present invention has the following advantages: the present invention uses two electric rollers to rotate in opposite directions to drag the film upward as a whole, so that different positions of the film are subjected to equal upward force, thereby automatically adjusting the flatness of the film to maintain the accuracy of the film tensile test.

[0015] The present invention detects the position of the film by means of the first pressure detector, the electromagnet and the third electromagnetic limiter on the mounting part, and ensures that the swing center is located on the longitudinal center line of the film when the film is swung, thereby improving the accuracy of film correction and thus increasing the accuracy of film tensile testing.

[0016] In the process of controlling the film to swing, the present invention automatically changes the positions of the detection column and the second pressure detector according to the rotation angle of the film, and ensures that the second pressure detector is always located at the boundary of the film, thereby accurately adjusting the film to a vertical state. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2It is a three-dimensional structural schematic diagram of the fixed frame, the sliding plate and the first fixed block of the present invention;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the sliding plate and the first fixed block of the present invention;

[0020] Figure 4 is a cross-sectional view of a first sliding frame of the present invention;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the first fixing block and the locking member of the present invention;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the fixed slide rail, the electromagnet and the fixed plate of the present invention;

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the second sliding frame and the locking member of the present invention;

[0024] Figure 8 is a cross-sectional view of a second sliding frame and a clamping plate of the present invention;

[0025] Fig. 9 It is a three-dimensional structural schematic diagram of the X-shaped frame, the fixing plate and the detection frame of the present invention;

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the detection frame, the detection column and the micro electric rotor of the present invention;

[0027] Fig.11 This is a detailed illustration of the detection column and the second pressure detector of the present invention.

[0028] The markings of the components in the accompanying drawings are as follows: 1. fixed frame, 2. winding roller, 3. sliding plate, 4. first sliding block, 5. first electric shaft, 6. first sliding frame, 7. first fixed block, 8. second fixed block, 9. electric roller, 10. second sliding block, 11. second electric shaft, 12. second sliding frame, 13. clamping plate, 14. locking member, 15. limit plate, 16. first electromagnetic limiter, 161. second electromagnetic limiter, 17. X-shaped frame, 18. electric push rod, 19. fixed slide rail, 20. mounting member, 21. first pressure detector, 22. electromagnet, 23. fixed plate, 24. detection frame, 25. detection column, 26. second pressure detector, 27. micro electric shaft, 271. third electromagnetic limiter, 28. fixed frame, 29. electromagnetic clamping block, 30. clamping block. DETAILED DESCRIPTION

[0029] 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.

[0030] Because the existing film tensile testing machine cannot automatically correct the flatness and vertical state of the film, if the film is skewed or uneven during installation, it will inevitably affect the test results of the film tensile testing machine, causing errors in the test results of the film.

[0031] Therefore, the present invention proposes a stretching degree detection device for mulch film production, such as Figure 1-Figure 4 and Figure 6 As shown, it includes: a fixed frame 1, on which a winding roller 2 is installed, the fixed frame 1 is slidably connected to a sliding plate 3, and the winding roller 2 is wound with a drag rope fixed to the sliding plate 3; a first sliding block 4, which is slidably connected to the sliding plate 3, and a first spring is installed between the two, the first sliding block 4 is installed with a first electric shaft 5, the first electric shaft 5 is slidably connected to a first sliding frame 6, and a second spring is installed between the two, the first sliding frame 6 is fixed to a first fixed block 7, and the first fixed block 7 is slidably connected to a second fixed block 8; a plurality of electric rollers 9 are symmetrically distributed and are respectively installed on the first fixed block 7 and the second fixed block 8; a clamping mechanism is arranged at the lower part of the fixed frame 1, and is used to clamp the lower part of the film.

[0032] In the above scheme, the winding roller 2 is an existing device, and the sliding plate 3 is controlled to move by winding or loosening the drag rope thereon. The winding roller 2 and the first electric shaft 5 are both electrically connected to the external control terminal. The number of electric rollers 9 is set to two symmetrically distributed, and the two electric rollers 9 are both located on the same horizontal plane. The electric rollers 9 are electrically connected to the control terminal. The outer side of the electric roller 9 is made of rubber material to increase its friction force on the film. In this scheme, an existing clamping device is installed between the first fixed block 7 and the adjacent second fixed block 8, which is used to make the two electric rollers 9 move towards each other and clamp the film in the middle together. The clamping mechanism is electrically connected to the control terminal.

[0033] The working principle is as follows: the staff cuts all the films (ground films) that need to be measured into narrow strips with uniform width, and then fixes the lower side of the films on the clamping mechanism. The staff needs to ensure that the films clamped by the clamping mechanism are free of wrinkles. Then the staff pulls the film upward and passes the upper part of the film through the gap between the two electric rollers 9. The staff controls the first fixed block 7 and the second fixed block 8 through the existing clamping device to drive the adjacent electric rollers 9 to clamp in opposite directions, so that the two electric rollers 9 clamp the film together. At this time, because the upper and lower sides of the film are clamped in different positions, the left and right sides of the film will not be tightened at the same time (that is, the film on one side is more stretched and the film on the other side is more relaxed). The staff starts the two electric rollers 9 at the same time through the control terminal, so that the front electric roller 9 rotates clockwise (from left to right perspective), and the rear electric roller 9 rotates counterclockwise (from left to right perspective), so that the two electric rollers 9 drag the clamped film upward together, thereby making the film on the left Both right sides are subjected to upward friction, which promotes the two sides of the film to be gradually tensioned to the same degree. At this time, the clamping force between the electric roller 9 and the film is limited, thereby preventing the film from being stretched due to excessive friction between the two electric rollers 9 when the two electric rollers 9 are tensioning the film. The above process is described in detail below using the example that the left side of the film is tensioned and the right side is relatively relaxed: the tension on the left side of the film gradually increases as the two electric rollers 9 drag upward. When the tension on the left side of the film is equal to the dragging force of the two electric rollers 9, the film slips between the two electric rollers 9, indicating that the tension on the left side reaches the expected value and will no longer be dragged upward. The tension on the right side of the film also increases as the two electric rollers 9 drag equally, causing the right side of the film to gradually change from relaxation to tension. When the tension on the right side of the film is the same as the tension on the left side of the film, the right side of the film also slips between the electric rollers 9 and is no longer dragged upward. At this time, the tension on each part of the film is the same, and the film is in a flat state.

[0034] After the staff drags the film flat, they turn off the electric roller 9 through the control terminal, and then continue to increase the squeezing force between the two electric rollers 9 through the existing device, so that the two electric rollers 9 completely clamp the film. Then the staff controls the winding roller 2 to reel in the dragging rope, and the dragging rope drags the sliding plate 3 upward. The sliding plate 3 drives the electric roller 9 and the upper part of the film to move upward through the connected components, and the clamping mechanism remains in place. The clamping mechanism cooperates with the two electric rollers 9 to perform a tensile test on the film. The control terminal records the dragging force of the winding roller 2 from the film, and records the dragging force of the film and the winding distance of the winding roller 2 to obtain the stretching degree data of the film. When the film is broken, the staff opens the two electric rollers 9 and the clamping mechanism, and removes the film.

[0035] More preferably, if Figure 7-Figure 9As shown, the clamping mechanism includes: a second sliding block 10, which is slidably connected to the lower part of the fixed frame 1, and a third spring is installed between the two, the second sliding block 10 is installed with a second electric shaft 11, the second electric shaft 11 is slidably connected to the second sliding frame 12, and a fourth spring is installed between the two, and the second sliding frame 12 is slidably connected to the clamping plate 13; a swing component, which is arranged between the first electric shaft 5 and the second electric shaft 11, and is used to swing the film to a vertical state; a positioning component, which has at least two, which are respectively arranged on the first electric shaft 5 and the second electric shaft 11, and are used to position the longitudinal center line of the film.

[0036] In the above scheme, the second electric shaft 11 is electrically connected to the control terminal, and the clamping plate 13 and the second sliding frame 12 cooperate with each other to clamp the lower part of the film. In this scheme, the clamping plate 13 and the second sliding frame 12 are connected by an existing clamping device, and the clamping device is used to control the clamping plate 13 to approach or move away from the second sliding frame 12, thereby clamping the film between the two. When the two electric rollers 9 on the second electric shaft 11 clamp the upper part of the film, and the second sliding frame 12 and the clamping plate 13 cooperate to clamp the lower part of the film, the swing component controls the first electric shaft 5 to swing with the second electric shaft 11 as the axis, and swings the deflected film to a vertical state. The two positioning components are used to move the first electric shaft 5 and the second electric shaft 11 to the longitudinal center line of the film, respectively, thereby ensuring the accuracy of the swing component when swinging the film.

[0037] More preferably, if Figure 2-Figure 5 and Figure 8 As shown, the first fixed block 7 and the second sliding frame 12 are both rotatably connected to a locking member 14, and a slide groove is provided on the locking member 14. The slide groove consists of an inclined groove and an arc groove. The arc groove and the axis of the locking member 14 are perpendicular to each other. The second fixed block 8 and the clamping plate 13 are both limitedly matched with the slide grooves on the adjacent locking members 14.

[0038] In the above scheme, a connecting device is specifically disclosed between the first fixed block 7 and the adjacent second fixed block 8 and between the second sliding frame 12 and the clamping plate 13. The second fixed block 8 and the clamping plate 13 are both provided with a limiting ball that cooperates with the sliding groove on the locking piece 14. The inclined groove of the locking piece 14 gradually tilts from the top to the bottom toward the front side. The locking piece 14 rotates through the inclined groove on it to drive the adjacent second fixed block 8 or the adjacent clamping plate 13 to move. When the upper limiting ball of the second fixed block 8 and the upper limiting ball of the clamping plate 13 move to the arc groove of the adjacent locking piece 14, the limiting ball is limited by the adjacent arc groove, forming a structure in which the second fixed block 8 and the clamping plate 13 are respectively locked with the adjacent locking piece 14, thereby preventing the second fixed block 8 and the clamping plate 13 from moving forward and backward relative to the adjacent locking piece 14 in the direction of pressure.

[0039] More preferably, if Figure 6-Figure 9 As shown, the swing assembly includes: a limit plate 15, which is rotatably connected to the second electric rotating shaft 11, and the limit plate 15 is limitedly matched with the first electric rotating shaft 5 and is slidably connected; a first electromagnetic limiter 16, which is fixedly connected to the first sliding block 4, and the first electromagnetic limiter 16 is limitedly matched with the limit plate 15, and a second electromagnetic limiter 161 is fixedly connected to the side of the limit plate 15 close to the second electric rotating shaft 11, and the second electromagnetic limiter 161 is limitedly matched with the second sliding frame 12.

[0040] In the above scheme, the first electromagnetic limiter 16 and the second electromagnetic limiter 161 are both electrically connected to the control terminal, and the first electromagnetic limiter 16 and the second electromagnetic limiter 161 are both existing devices. The first electromagnetic limiter 16 cooperates with the limit plate 15 through electromagnetic force to limit each other, thereby ensuring that the limit plate 15 and the first electromagnetic limiter 16 are in a relatively fixed state, and the second electromagnetic limiter 161 cooperates with the second sliding frame 12 through electromagnetic force to limit each other, thereby ensuring that the limit plate 15 and the second sliding frame 12 are in a relatively fixed state, thereby ensuring that the second electric shaft 11 drives the limit plate 15 and the first electric shaft 5 and other components to rotate with the second electric shaft 11 as the center and the distance between the first electric shaft 5 and the second electric shaft 11 as the radius, thereby controlling the rotation and alignment of the film.

[0041] More preferably, if Figure 4 and Figure 6-Figure 9 As shown, the positioning assembly includes: an x-shaped frame 17, which is rotatably connected to the first electric rotating shaft 5 or the second electric rotating shaft 11, the x-shaped frame 17 is equipped with an electric push rod 18, the x-shaped frame 17 is equipped with symmetrically distributed fixed slide rails 19, the fixed slide rails 19 are slidably connected with mounting members 20, and the mounting members 20 are slidably connected to the adjacent first sliding frame 6 or the adjacent second sliding frame 12; first pressure detectors 21, which are the same in number as the mounting members 20 and are mounted on adjacent mounting members 20; electromagnets 22, which are the same in number as the mounting members 20 and are mounted on adjacent mounting members 20, the fixed frame 1 and the sliding plate 3 are both fixedly connected with a fixed plate 23, the electromagnets 22 are magnetically matched with the adjacent fixed plates 23, the mounting member 20 is equipped with a third electromagnetic limiter 271, and the second sliding frame 12 and the first sliding frame 6 are both limitedly matched with the adjacent third electromagnetic limiter 271; a measuring component, the mounting member 20 arranged on the second sliding frame 12, is used to determine whether the film is rotated to a vertical state.

[0042] In the above scheme, the electric push rod 18, the first pressure detector 21, the electromagnet 22 and the third electromagnetic limiter 271 are all electrically connected to the control terminal. The interior of the fixed plate 23 is made of ferromagnetic material, and the outer surface of the fixed plate 23 is made of rubber material, which is used to increase the friction force of the fixed plate 23 on the electromagnet 22. When the electromagnet 22 and the fixed plate 23 are magnetically engaged, the mounting part 20 and the adjacent fixed plate 23 are in a relatively fixed state, which is used to cooperate with the adjacent first pressure detector 21 to locate the boundary of the adjacent film.

[0043] The working principle is as follows: take the following x-shaped frame 17 and adjacent parts as an example: after the staff adjusts the film to a flat state, the telescopic end of the electric push rod 18 is controlled to retract, and the telescopic end of the electric push rod 18 drives the x-shaped frame 17 to shrink around the second electric rotating shaft 11, and the x-shaped frame 17 drives the two adjacent mounting parts 20 to move in opposite directions through the two adjacent fixed slide rails 19. Take the first pressure detector 21 on the right side contacting the film first as an example: the control terminal immediately activates the third electromagnetic limiter 271 on the right and the electromagnet 22 on the right. At this time, the electromagnet 22 on the right is magnetically matched with the adjacent fixed plate 23, so that the right mounting part 20 is in a relatively fixed state with the right fixed plate 23 and the fixed frame 1. After the third electromagnetic limiter 271 on the right is activated, it cooperates with the second sliding frame 12 to limit the right mounting part 20. It is in a relatively fixed state with the second sliding frame 12. At this time, when the telescopic end of the electric push rod 18 continues to retract, the x-shaped frame 17 drives the left-side components to shrink to the right as a whole, and the second sliding block 10 and the second electric shaft 11 move to the right together under the drive of the x-shaped frame 17. The second sliding block 10 and the second electric shaft 11 slide to the right relative to the fixed frame 1 and the second sliding frame 12, and the third springs on both sides are driven by the second sliding block 10 to deform and accumulate force until the first pressure detector 21 on the left mounting part 20 contacts the film, and the control terminal starts the third electromagnetic limiter 271 and the electromagnet 22 on the left, and closes the electric push rod 18. At this time, because the first pressure detectors 21 on both sides of the x-shaped frame 17 contact the film, the second electric shaft 11 is just located on the longitudinal center line of the film.

[0044] During the above process of adjusting the positions of the first electric shaft 5 and the second electric shaft 11, the first electromagnetic limiter 16 and the second electromagnetic limiter 161 are both in an inactive state. At this time, the first electric shaft 5 and the limit plate 15 slide freely with each other, and the second electric shaft 11 and the limit plate 15 rotate freely with each other. After the positions of the first electric shaft 5 and the second electric shaft 11 are adjusted according to the above working principle, that is, when the two electric push rods 18 are closed, the first electric shaft 5 and the second electric shaft 11 are both located on the longitudinal center line of the film. At this time, the line between the two is the longitudinal center line of the film, and the control terminal activates the first electromagnetic limiter 16 and the second electromagnetic limiter 161. The limiter 161, the first electromagnetic limiter 16 limits the limit plate 15, so that the first electric shaft 5 and the limit plate 15 are in a relatively fixed state, the second electromagnetic limiter 161 limits the second sliding frame 12, so that the second sliding frame 12, the second electric shaft 11 and the limit plate 15 are in a mutually fixed state, and then the control terminal controls the second electric shaft 11 to rotate, and the second electric shaft 11 drives the first electric shaft 5 to rotate together through the limit plate 15 until the connecting line between the first electric shaft 5 and the second electric shaft 11 rotates to a vertical state, and the control terminal controls the second electric shaft 11 to stop rotating, and at this time the film is corrected to a vertical state.

[0045] More preferably, if Figure 4 and Figure 6-Figure 8 As shown, the line between two adjacent first pressure detectors 21 on the first sliding frame 6 intersects with the central axis of the first electric shaft 5 , and the line between two adjacent first pressure detectors 21 on the second sliding frame 12 intersects with the central axis of the second electric shaft 11 .

[0046] In the above scheme, by making the connecting line between the two first pressure detectors 21 on the first sliding frame 6 intersect with the central axis of the first electric shaft 5, it is ensured that the central axis of the first electric shaft 5 is always located at the midpoint of the two first pressure detectors 21, and then when the two first pressure detectors 21 on the first sliding frame 6 are in contact with the film, the central axis of the first electric shaft 5 intersects with the longitudinal center line of the film. The positional relationship between the two adjacent first pressure detectors 21 on the second sliding frame 12 and the central axis of the second electric shaft 11 is also used to ensure that the central axis of the second electric shaft 11 intersects with the longitudinal center line of the film.

[0047] More preferably, if Figure 2-Figure 9 As shown, the detection head of the first pressure detector 21 is bullet-shaped, and the axis of the detection head of the first pressure detector 21 is located between the second sliding frame 12 and the clamping plate 13, and the extended surface of the second sliding frame 12 close to the clamping plate 13 intersects with the outer surface of the electric roller 9 on the first fixed block 7, and the intersection line is only a straight line.

[0048] In the above scheme, by setting the detection head of the first pressure detector 21 to be bullet-shaped, the contact position between the first pressure detector 21 and the film is precisely controlled, thereby ensuring that when the first pressure detector 21 contacts the film, the contact point is located on the central axis of the detection head of the first pressure detector 21, thereby ensuring the accuracy of subsequent positioning of the adjacent first electric shaft 5 and the adjacent second electric shaft 11. The extended surface of the front side surface of the second sliding frame 12 and the front side intersection of the electric roller 9 on the first fixed block 7 have only one straight line, thereby ensuring that the film clamped by the two electric rollers 9 and the film clamped by the second sliding frame 12 and the clamping plate 13 are always in a vertical state in the front and rear directions, thereby increasing the accuracy of film detection and reducing the difficulty of adjusting the film to a vertical state.

[0049] More preferably, if Figure 7-Figure 11 As shown, the measuring component includes: a detection frame 24, which has two symmetrically distributed ones, which are rotatably connected to the adjacent mounting parts 20 on the second sliding frame 12, and the fixed frame 1 is fixed with a bracket slidably connected to the detection frame 24; the detection columns 25, the number of which is the same as the detection frames 24, are respectively arranged on adjacent detection frames 24, and a second pressure detector 26 is installed on the side of the detection column 25 away from the detection frame 24, and the detection head of the second pressure detector 26 is a straight plate type.

[0050] In the above scheme, the rotating connection between the detection frame 24 and the adjacent mounting part 20 has a telescopic structure, which can be extended or shortened in the vertical direction. The axis of the rotating connection between the detection frame 24 and the adjacent mounting part 20 passes through the end of the bullet head of the adjacent first pressure detector 21 to ensure that when the detection frame 24 rotates between the adjacent mounting part 20, the rotation axis of the detection frame 24 always intersects with the boundary of the film. The second pressure detector 26 is electrically connected to the control terminal. In the initial state, the detection head of the first pressure detector 21 and the detection head of the second pressure detector 26 are located on the same vertical plane. The detection head of the second pressure detector 26 is set to a horizontal straight plate type, thereby increasing its probability of contact with the film and improving the detection accuracy of the second pressure detector 26.

[0051] The working principle is: when the second electric shaft 11 drives the first electric shaft 5 and other parts to rotate, the control terminal first turns off all the electromagnets 22, and then the control terminal controls the second electric shaft 11 and the first electric shaft 5 to drive the adjacent x-shaped frame 17 to rotate. The x-shaped frame 17 drives the detection frame 24 to move through the adjacent mounting part 20. The detection frame 24 cannot rotate and can only move left and right with the adjacent mounting part 20. The detection frame 24 is close to the side of the adjacent mounting part 20 to extend and retract up and down. When the detection frame 24 moves left and right, it also drives the adjacent detection column 25 to move left and right. As the film is gradually rotated to a vertical state, the distance between the second pressure detector 26 on the detection column 25 and the film becomes closer and closer. When the second pressure detector 26 contacts the film, the control terminal receives a signal and controls the second electric shaft 11 to stop rotating.

[0052] More preferably, if Fig.10 As shown, a micro-electric rotating shaft 27 is installed on the detection frame 24 , the micro-electric rotating shaft 27 is fixedly connected to the detection column 25 , and the detection frame 24 is rotatably connected to the detection column 25 .

[0053] In the above scheme, the micro-electric shaft 27 is electrically connected to the control terminal. Because the staff cannot predict whether the film will tilt to the left or to the right, when the staff controls the first pressure detector 21 on the second sliding frame 12 to detect the position of the film, the mounting member 20 drives the first pressure detector 21 and the second pressure detector 26 to move together. If the first pressure detector 21 and the second pressure detector 26 on one side contact the film at the same time, it indicates that the film is in a vertical state at this time. If the first pressure detector 21 on the right side contacts the film first, the film gradually tilts to the left from bottom to top. If the second pressure detector 26 on the right side contacts the film first, the surface film tilts to the right. The control terminal needs to promptly control the micro-electric shaft 27 on the right side to drive the detection column 25 on the right side to rotate forward, so that the second pressure detector 26 on the right side is out of contact with the film, so as to avoid the second pressure detector 26 on the right side squeezing the film and affecting the contact between the first pressure detector 21 on the right side and the film.

[0054] More preferably, if Figure 3 , Figure 4 and Figure 6 As shown, it also includes: an auxiliary clamping mechanism, which is arranged on the sliding plate 3 and is used to clamp the upper part of the film when pulling the film. The auxiliary clamping mechanism includes: a fixed frame 28, which is fixed to the sliding plate 3 and is located at the lower side of the first sliding frame 6; an electromagnetic clamping block 29, which is fixed to the fixed frame 28; a clamping block 30, which is slidably connected to the fixed frame 28, and a fifth spring is fixed between the two, and the clamping block 30 and the electromagnetic clamping block 29 are magnetically matched.

[0055] In the above scheme, in order to avoid the situation where the contact area between the two electric rollers 9 and the film is too small, resulting in the two electric rollers 9 being unable to clamp the film during the subsequent tensile test, a fixing frame 28, an electromagnetic clamp block 29 and a clamping block 30 are additionally provided. The electromagnetic clamp block 29 is electrically connected to the control terminal. When the electromagnetic clamp block 29 is energized, the clamping block 30 is attracted to clamp the film together to stretch the film upward. By arranging the clamping block 30 and the electromagnetic clamp block 29 on the lower side of the two electric rollers 9, it is ensured that the film clamped by the two is a film that has been corrected to be flat and in a vertical state, thereby ensuring the accuracy of the tensile test.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the described embodiments and their various equivalents.

Claims

1. A stretchability detection device for mulch film production, characterized in that: Included are: A fixed frame (1) is provided with a winding roller (2), the fixed frame (1) is slidably connected to a sliding plate (3), and the winding roller (2) is wound with a towing rope fixed to the sliding plate (3); A first sliding block (4) is slidably connected to the sliding plate (3), and a first spring is installed between the two. The first sliding block (4) is installed with a first electric rotating shaft (5), and the first electric rotating shaft (5) is slidably connected to a first sliding frame (6), and a second spring is installed between the two. The first sliding frame (6) is fixedly connected to a first fixed block (7), and the first fixed block (7) is slidably connected to a second fixed block (8); A plurality of electric rollers (9) are symmetrically distributed and respectively mounted on the first fixed block (7) and the second fixed block (8); A clamping mechanism, arranged at the lower part of the fixed frame (1) and used for clamping the lower part of the film; The clamping mechanism comprises: A second sliding block (10) is slidably connected to the lower part of the fixed frame (1), and a third spring is installed between the two. The second sliding block (10) is installed with a second electric rotating shaft (11), and the second electric rotating shaft (11) is slidably connected to a second sliding frame (12), and a fourth spring is installed between the two. The second sliding frame (12) is slidably connected to a clamping plate (13); A swing assembly, disposed between the first electric rotating shaft (5) and the second electric rotating shaft (11), and used for swinging the film to a vertical state; There are at least two positioning components, which are respectively arranged on the first electric rotating shaft (5) and the second electric rotating shaft (11) and are used to locate the longitudinal center line of the film.

2. A stretchability detection device for mulch film production according to claim 1, characterized in that: The first fixed block (7) and the second sliding frame (12) are both rotatably connected to a locking member (14), and a slide groove is provided on the locking member (14), the slide groove is composed of an inclined groove and an arc groove, and the arc groove and the axis of the locking member (14) are perpendicular to each other, and the second fixed block (8) and the clamping plate (13) are both limitedly matched with the slide groove on the adjacent locking member (14).

3. A stretchability detection device for mulch film production according to claim 2, characterized in that: The swing assembly comprises: A limit plate (15) is rotatably connected to the second electric rotating shaft (11), and the limit plate (15) is limitedly matched with the first electric rotating shaft (5) and is slidably connected; A first electromagnetic limiter (16) is fixedly connected to the first sliding block (4), the first electromagnetic limiter (16) cooperates with the limit plate (15) in a limiting manner, a second electromagnetic limiter (161) is fixedly connected to a side of the limit plate (15) close to the second electric rotating shaft (11), and the second electromagnetic limiter (161) cooperates with the second sliding frame (12) in a limiting manner.

4. A stretchability detection device for mulch film production according to claim 3, characterized in that: The positioning component includes: An x-shaped frame (17) is rotatably connected to the first electric rotating shaft (5) or the second electric rotating shaft (11), the x-shaped frame (17) is equipped with an electric push rod (18), the x-shaped frame (17) is equipped with symmetrically distributed fixed slide rails (19), the fixed slide rails (19) are slidably connected to a mounting member (20), and the mounting member (20) is slidably connected to the adjacent first sliding frame (6) or the adjacent second sliding frame (12); The first pressure detectors (21) are the same in number as the mounting members (20) and are mounted on adjacent mounting members (20); The electromagnets (22) are the same in number as the mounting members (20) and are mounted on adjacent mounting members (20); the fixed frame (1) and the sliding plate (3) are both fixedly connected to a fixed plate (23); the electromagnets (22) are magnetically matched with the adjacent fixed plate (23); the mounting member (20) is installed with a third electromagnetic stopper (271); the second sliding frame (12) and the first sliding frame (6) are both limitedly matched with the adjacent third electromagnetic stopper (271); A measuring component, arranged on the mounting member (20) on the second sliding frame (12), is used to measure whether the film is rotated to a vertical state.

5. A stretchability detection device for mulch film production according to claim 4, characterized in that: A line connecting two adjacent first pressure detectors (21) on the first sliding frame (6) intersects with the central axis of the first electric rotating shaft (5), and a line connecting two adjacent first pressure detectors (21) on the second sliding frame (12) intersects with the central axis of the second electric rotating shaft (11).

6. A stretchability detection device for mulch film production according to claim 5, characterized in that: The detection head of the first pressure detector (21) is bullet-shaped, and the axis of the detection head of the first pressure detector (21) is located between the second sliding frame (12) and the clamping plate (13), and the extended surface of the second sliding frame (12) on the side close to the clamping plate (13) intersects with the outer surface of the electric roller (9) on the first fixed block (7), and the intersection line is only a straight line.

7. A stretchability detection device for mulch film production according to claim 6, characterized in that: The measuring components include: The detection frame (24) has two symmetrically distributed ones, which are respectively rotatably connected to the adjacent mounting members (20) on the second sliding frame (12); the fixed frame (1) is fixedly connected with a bracket which is slidably connected to the detection frame (24); The number of detection columns (25) is the same as that of the detection frames (24), and they are respectively arranged on adjacent detection frames (24). A second pressure detector (26) is installed on a side of the detection column (25) away from the detection frame (24), and the detection head of the second pressure detector (26) is a straight plate type.

8. A stretchability detection device for mulch film production according to claim 7, characterized in that: A micro-electric rotating shaft (27) is mounted on the detection frame (24); the micro-electric rotating shaft (27) is fixedly connected to the detection column (25); and the detection frame (24) is rotatably connected to the detection column (25).

9. A stretchability detection device for mulch film production according to claim 4, characterized in that: Also included are: An auxiliary clamping mechanism is arranged on the sliding plate (3) and is used to clamp the upper part of the film when the film is pulled, and the auxiliary clamping mechanism comprises: A fixed frame (28) fixedly connected to the sliding plate (3) and located at the lower side of the first sliding frame (6); An electromagnetic clamping block (29) fixedly connected to the fixing frame (28); The clamping block (30) is slidably connected to the fixing frame (28), and a fifth spring is fixedly connected between the two. The clamping block (30) is magnetically matched with the electromagnetic clamping block (29).

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