Device for testing water absorption and expansion rate of paper

Abstract

The invention relates to a device for detecting the water absorption expansion rate of paper, and belongs to the technical field of paper absorption detection. The device comprises a detection box, wherein a plurality of longitudinal bars are arranged above the detection box, and a plurality of longitudinal bars are slidably arranged on the upper sides of the plurality of longitudinal bars, wherein the plurality of longitudinal bars are perpendicular to the transverse bars, and a plurality of transverse bars are slidably arranged on the upper sides of the plurality of transverse bars, wherein a temperature control mechanism is arranged at the inner bottom of the detection box, a resistance reduction mechanism located above the temperature control mechanism is arranged inside the detection box, and paper is arranged on the upper side of the resistance reduction mechanism, wherein the resistance reduction mechanism is used to reduce the adhesion between the wet paper and the temperature control mechanism, and a measuring plate located on the upper side of the paper is arranged inside the detection box. In the invention, the pulling force of water in the paper after absorbing water on the paper can be reduced by the resistance reduction mechanism, thereby improving the detection accuracy of the paper when expanding.

Description

Technical Field

[0001] The invention belongs to the technical field of paper water absorption detection, and in particular relates to a device for detecting the water absorption expansion rate of paper. Background Art

[0002] The expansion rate of paper mainly refers to the changes in the length and width of the paper. For example, during the decoration or printing process, the paper will expand after being damp, which will affect the decoration and printing quality. Therefore, the detection of the water absorption expansion rate of paper is very important.

[0003] For example, in the Chinese utility model patent with announcement number CN209590026U and the name of a paper water absorption expansion rate detection device, the paper is soaked and then taken out and laid on the detection table, and then by arranging a level meter on the side and end of the detection table respectively, the end level and side level of the detection table can be checked in time, which can be used as a reference for adjusting the level of the detection table, so that the detection table can be kept more horizontal and stable, and the paper can be made more horizontal without affecting its original expansion rate. However, generally, there is adhesion between water molecules and the detection table after the paper is wetted. Therefore, if the wet paper is directly laid on the detection table, due to the adhesion between the water molecules and the detection table, the paper will be pulled to avoid expansion, so the expansion rate of the wet paper is reduced, making the detection of the paper water absorption expansion rate inaccurate. Therefore, it is now necessary to detect an accurate device for detecting the paper water absorption expansion rate. Summary of the invention

[0004] The purpose of the present invention is to provide a device for detecting the water absorption expansion rate of paper with a simple structure and reasonable design in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A device for detecting the water absorption expansion rate of paper comprises a detection box, a plurality of longitudinal bars are arranged above the detection box, transverse bars are slidably arranged on the upper sides of the plurality of longitudinal bars, the plurality of longitudinal bars and the transverse bars are perpendicular to each other, a water dripping mechanism is slidably arranged on the upper sides of the plurality of transverse bars, a temperature control mechanism is arranged at the bottom of the inner side of the detection box, a resistance reduction mechanism located above the temperature control mechanism is arranged on the inner side of the detection box, paper is arranged on the upper side of the resistance reduction mechanism, wherein the resistance reduction mechanism is used to reduce the adhesion between the wet paper and the detection box, and a measuring plate located on the upper side of the paper is arranged on the inner side of the detection box.

[0007] As a further optimization scheme of the present invention, the dripping mechanism includes a dripping tube slidably arranged on a cross bar, a dripping pipe is connected to the bottom of the dripping tube, a valve is arranged on the dripping pipe, and volume measurement scale lines are arranged on the side wall of the dripping tube.

[0008] As a further optimization scheme of the present invention, transverse guide grooves are opened on the inner sides of several of the transverse guide grooves, transverse sliders are slidably arranged on the inner sides of several of the transverse guide grooves and are respectively fixedly connected to the drip tubes, and transverse scale lines are arranged on the edges of several of the transverse bars.

[0009] As a further optimization scheme of the present invention, longitudinal guide grooves are opened on the inner sides of several longitudinal rods, longitudinal sliders are slidably arranged on the inner sides of several longitudinal guide grooves and are respectively fixedly connected to one end of the cross rod, handles are fixedly arranged on the upper sides of several longitudinal sliders, and longitudinal scale lines are arranged on the edges of several longitudinal rods.

[0010] As a further optimization solution of the present invention, the temperature control mechanism includes a heating base and a temperature sensor arranged at the bottom of the detection box, and a heating tube is arranged on the inner side of the heating base.

[0011] As a further optimization solution of the present invention, the resistance reduction mechanism includes a grid bracket fixedly arranged on the inner side of the detection box and located above the heating tube, and a plurality of balls are arranged on the upper side of the grid bracket.

[0012] As a further optimization scheme of the present invention, the measuring plate is made of transparent material, length scale lines are set on both sides of the length direction of the measuring plate, width scale lines are set on both sides of the width direction of the measuring plate, and height adjustment components are set on both sides of the width of the measuring plate.

[0013] As a further optimization scheme of the present invention, the height adjustment assembly includes a pull ring fixedly arranged on the edge of the measuring plate in the width direction, a pull rope is fixedly arranged on the upper side of the pull ring, and positioning assemblies for positioning the pull rope are arranged on the front and rear sides of the detection box.

[0014] As a further optimization scheme of the present invention, the positioning assembly includes several card plates fixedly arranged on the front and rear sides of the detection box, several of the card plates are arranged vertically and tilted downward, and the lower sides of several of the card plates are provided with penetrating card slots, and one end of the pull rope is fixedly provided with a card block that engages with the card slot.

[0015] As a further optimization solution of the present invention, ventilation holes are provided on all sides of the measuring plate, and limiting grooves that are slidably matched with the measuring plate are vertically provided on the front and rear sides of the detection box.

[0016] The beneficial effects of the present invention are:

[0017] 1. In the present invention, the dripping tube can be freely moved above the detection box by sliding the dripping tube on the horizontal bar and the horizontal bar on the vertical bar, so that the position of the dripping tube on the lower side of the dripping tube on the paper can be adjusted, so that water can be dripped at different positions of the paper, and the water absorption expansion rate at different positions of the paper can be detected, and the influence of dripping water of different volumes on the water absorption rate of the paper can also be detected, thereby improving the practicability of the device for paper detection.

[0018] 2. In the present invention, a plurality of balls can reduce the adhesion between the paper and the grid support after it is wetted, thereby preventing the paper from being pulled by the adhesion of water, thereby reducing the water absorption and expansion of the paper and avoiding affecting the accuracy of the detection of the water absorption and expansion rate of the paper.

[0019] 3. In the present invention, by arranging a pull rope on the upper side of the measuring plate and fixing the pull rope, the measuring plate can be suspended above the paper. On the one hand, the measurement accuracy can be improved, and on the other hand, the measuring plate can be prevented from being pressed on the upper side of the absorbent paper, thereby preventing the length and width of the absorbent paper from being squeezed and deformed, thereby affecting the detection of the expansion rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention from a top view;

[0022] Figure 3 is a schematic diagram of a first internal overall structure of the present invention;

[0023] Figure 4 is a second internal overall structure schematic diagram of the present invention;

[0024] Figure 5 is a third internal overall structure schematic diagram of the present invention;

[0025] Figure 6 The present invention Figure 1 Enlarged view of point A in the middle;

[0026] Figure 7 The present invention Figure 1 Enlarged view of point B in the middle;

[0027] Figure 8 The present invention Figure 2 Enlarged view of point C in the middle;

[0028] Fig. 9 The present invention Figure 4 Enlarged view of point D in the middle;

[0029] Fig.10 The present invention Figure 5 Enlarged view of point E in the middle.

[0030] In the figure: 1. detection box; 2. longitudinal rod; 3. longitudinal guide groove; 4. transverse rod; 5. dripping tube; 6. measuring plate; 7. length scale line; 8. pull ring; 9. pull rope; 10. limit groove; 11. vent hole; 12. width scale line; 13. clamping plate; 14. clamping groove; 15. transverse guide groove; 16. longitudinal slider; 17. handle; 18. longitudinal scale line; 19. resistance reduction mechanism; 1901. grid bracket; 1902. ball bearing; 20. temperature control mechanism; 2001. heating tube; 2002. heating base; 21. temperature sensor; 22. transverse slider; 23. volume measurement scale line; 24. transverse scale line; 25. dripping tube; 26. valve; 27. clamping block. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0032] Example 1: Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Fig. 9 , Fig.10As shown, a device for detecting the water absorption expansion rate of paper includes a detection box 1, which is a hollow cavity with an upper opening. A plurality of longitudinal rods 2 are arranged above the detection box 1. In this embodiment, two longitudinal rods 2 are used, and the specific number can be flexibly adjusted according to needs. The connection relationship between the two longitudinal rods 2 and the detection box 1 can be: one end of the longitudinal rod 2 is rotatably connected to one side of the detection box 1, and the other end of the longitudinal rod 2 is snap-fitted with one side of the detection box 1. When the longitudinal rod 2 needs to be opened, one end of the longitudinal rod 2 can be pulled to make the other end of the longitudinal rod 2 rotate horizontally on the upper side of the detection box 1. The connection relationship between the two longitudinal rods 2 and the detection box 1 can also be: the two ends of the two longitudinal rods 2 are detachably connected to the two sides of the detection box 1 through pins (not shown in the figure). The two longitudinal rods 2 are respectively arranged on the front and rear edges of the detection box 1, and the edges of the two longitudinal bars 2 are provided with longitudinal scale lines 18, through which the position coordinates of the dripping water can be accurately controlled to simulate the paper absorbing water in the real environment. The inner sides of the two longitudinal bars 2 are provided with longitudinal guide grooves 3, and the upper sides of the two longitudinal bars 2 are slidably provided with cross bars 4. The two cross bars 4 can be connected together by a pin shaft (not shown in the figure), and the two cross bars 4 can be connected together by the pin shaft to facilitate the simultaneous movement of the two cross bars 4. One end of the cross bar 4 is fixedly provided with a longitudinal slider 16 that slides on the inner side of the longitudinal guide groove 3, and the upper side of the longitudinal slider 16 is fixedly provided with a handle 17. The edges of the two cross bars 4 are provided with transverse scale lines 24, through which the paper can accurately absorb water. The position coordinates of dripping water can be accurately controlled to simulate the water absorption of paper in a real environment. A transverse guide groove 15 is provided on the inner side of the two transverse bars 4. The two longitudinal bars 2 are perpendicular to the transverse bars 4. A dripping mechanism is slidably provided on the upper side of the two transverse bars 4. The dripping mechanism includes a dripping tube 5 slidably provided on the transverse bar 4. A transverse slider 22 sliding on the inner side of the transverse guide groove 15 is fixedly provided at the bottom of the dripping tube 5. A dripping pipe 25 is provided at the bottom of the dripping tube 5. A valve 26 is provided on the dripping pipe 25. The dripping rate of the dripping pipe 25 can be controlled by the valve 26 to simulate the situation of being soaked in water in a real environment, so that the paper can simulate the change of the water absorption expansion rate in a real environment. The side wall of the dripping tube 5 is provided with a volume measurement scale line 23. When in use, By pushing the handle 17, the longitudinal slider 16 can be driven to slide on the inner side of the longitudinal guide groove 3, so that the cross bar 4 on one side of the longitudinal slider 16 slides along the longitudinal rod 2, so that the drip tube 5 on the cross bar 4 slides along the longitudinal rod 2, and the drip tube 25 on the lower side of the drip tube 5 slides longitudinally, so that the longitudinal position of the drip tube 5 and the drip tube 25 can be adjusted, and by pushing the transverse slider 22 to slide in the transverse guide groove 15, so that the drip tube 5 on the transverse slider 22 slides along the cross bar 4, the transverse position of the drip tube 5 and the drip tube 25 can be adjusted, so that water can be dripped into different positions of the paper, and the volume measurement scale line 23 on the side wall of the drip tube 5 can be used to accurately control the volume of the dripping water, which can simulate the paper in a real environment.The water absorption expansion rate of the paper when it is soaked in water at different positions and when it is soaked in water of different volumes improves the practicality of the device.

[0033] like Figure 2 , Figure 3 As shown, a temperature control mechanism 20 is provided at the inner bottom of the detection box 1. The temperature control mechanism 20 includes a heating base 2002 and a temperature sensor 21 provided at the bottom of the detection box 1. A heating tube 2001 is electrically connected to the inner side of the heating base 2002. The heating base 2002 and the temperature sensor 21 are externally connected to a controller (not shown in the figure). The temperature inside the detection box 1 can be controlled by the controller, and the water absorption expansion rate of paper at different temperatures can be simulated, thereby expanding the detection range of the device and improving the practicability of the device.

[0034] like Figure 2 , Figure 8 As shown, a resistance reducing mechanism 19 located above the temperature control mechanism 20 is arranged on the inner side of the detection box 1, wherein the resistance reducing mechanism 19 is used to reduce the adhesion between the wet paper and the temperature control mechanism 20, and the resistance reducing mechanism 19 includes a grid bracket 1901 fixedly arranged on the inner side of the detection box 1 and located above the heating tube 2001, and a plurality of balls 1902 are arranged on the upper side of the grid bracket 1901. In order to improve the smoothness of the surface of the balls 1902, the plurality of balls 1902 can be made of stainless steel or glass. The upper sides of the plurality of balls 1902 protrude from the upper side of the grid bracket 1901, and the plurality of balls 1902 are arranged to roll with the upper side of the grid bracket 1901. Paper (not shown in the figure) is arranged above the grid bracket 1901, and the movable and smooth balls 1902 can reduce the adhesion between the paper after absorbing water and the balls 1902. The adhesion between the balls 1902 reduces the effect of the water inside the paper on the stretching of the paper, and avoids inaccurate detection of the paper expansion rate after absorbing water. The paper is put in through the opening above the detection box 1, and the paper is supported on a number of balls 1902. When in use, a certain volume of water is dripped onto the paper at a specific position through the drip tube 25 on the lower side of the drip tube 5, and then the paper after absorbing water will expand on the upper side of the balls 1902. Since the contact area between the balls 1902 and the paper is similar to point contact, and the surface of the balls is very smooth, the balls can also roll on the grid bracket 1901, so when the paper absorbs water and expands, the adhesion between the water in the paper and the balls is basically negligible, so the change of the paper water absorption expansion rate in the real environment can be simulated, and the accuracy of the paper water absorption expansion rate detection can be improved.

[0035] Embodiment 2: Based on embodiment 1, further improvement is made in that Figure 1 , Figure 3 , Figure 7As shown, the front and rear sides of the detection box 1 are vertically provided with limit grooves 10, and the inner side of the detection box 1 is provided with a measuring plate 6 which is slidably connected with the limit groove 10 and is located on the upper side of the paper. The measuring plate 6 is provided with rubber sealing strips (not shown in the figure) around it. The rubber sealing strips can make the detection box 1 and the measuring plate 6 sealed to prevent temperature changes. The measuring plate 6 is provided with air holes 11 around it, and rubber sealing plugs (not shown in the figure) are provided in the air holes 11. The air holes 11 are blocked by the rubber sealing plugs. When the temperature inside the detection box 1 is controlled, the air holes 11 on the measuring plate 6 are sealed to prevent The temperature changes, and the temperature control is inaccurate when the paper absorbs water and expands, to prevent affecting the accuracy of the paper water absorption expansion rate detection, when the rubber sealing plug is pulled out of the air hole 11, the detection space between the detection box 1 and the measuring plate 6 can be dried through the heating tube 2001, so that the gas is discharged through the air hole 11, the drying efficiency is improved, the detection of the next paper is convenient, and the time between the detection of two papers is reduced. The measuring plate 6 is made of transparent material, and length scale lines 7 are set on both sides of the length direction of the measuring plate 6, and width scale lines 12 are set on both sides of the width direction of the measuring plate 6. Through the length scale line 7 and the width scale line 1 2 can measure the expansion length of paper after absorbing water, and then calculate the expansion rate of paper after absorbing water. A pull ring 8 is set on the edge of the measuring plate 6 in the width direction. A pull rope 9 is fixedly set on the upper side of the pull ring 8. A clamp block 27 is fixedly set on one end of the pull rope 9. A group of clamps 13 are respectively set on the front and rear sides of the detection box 1. Each group of clamps 13 includes multiple clamps 13. Each group of clamps 13 is vertically inclined downward. A clamping groove 14 is opened on the lower side of several clamps 13. The clamping groove 14 runs through the edge of the clamp 13. When it is necessary to measure the expansion rate of paper after absorbing water, first slide the measuring plate 6 horizontally from the front or rear side of the detection box 1 into the detection box 1. , and then pull the measuring plate 6 slowly down from the upper opening of the detection box 1. When the measuring plate 6 is about to approach the paper after absorbing water, the measuring plate 6 stops descending. At this time, the pull rope 9 is pulled out of the detection box 1, and the pull rope 9 is inserted from top to bottom into the card slot 14 on the card plate 13 of a certain height, and the card block 27 at the lower end of the pull rope 9 is low connected to the lower surface of the card plate 13, so that the pull rope 9 can be fixed, so that the measuring plate 6 is suspended on the inner side of the detection box 1, and the measuring plate 6 can be suspended above the absorbent paper. Since the measuring plate 6 does not contact and squeeze the absorbent paper, the expansion rate of the absorbent paper can be detected more accurately, thereby improving the detection accuracy.

[0036] It should be noted that, when using the device for detecting the water absorption expansion rate of paper, firstly, paper (not shown in the figure) is placed on the upper side of the grid bracket 1901, so that the paper is attached to the upper surface of the plurality of balls 1902 on the upper side of the grid bracket 1901, and then a certain volume of water is filled into the interior of the drip tube 5, and then the cross bar 4 is slid so that the longitudinal slider 16 at one end of the cross bar 4 slides on the longitudinal bar 2, and at the same time, the drip tube 5 is slid so that the transverse slider 22 at the bottom of the drip tube 5 slides on the cross bar 4, so that the coordinates of the drip tube 5 can be adjusted, so that the dripping coordinates of the dripping pipe 25 at the bottom of the drip tube 5 can be adjusted, and the expansion rate of the paper after absorbing water at different positions can be detected, and the expansion rate of the paper after absorbing different water can also be detected. When the paper absorbs water, it is necessary to detect the change in the length and width of the paper. , one end of the longitudinal rod 2 can be pulled to make the other end of the longitudinal rod 2 rotate horizontally on the upper side of the detection box 1, so that the two longitudinal rods 2 can be rotated horizontally away from each other, so that the two longitudinal rods 2 are away from the top of the detection box 1, or the two longitudinal rods 2 can be detachably connected to the two longitudinal rods 2 by pins, and then the pull ropes 9 on both sides of the measuring board 6 are pulled to make the measuring board 6 slowly descend from the upper end opening of the detection box 1. When the measuring board 6 is about to approach the paper after absorbing water, the measuring board 6 stops descending. At this time, the pull rope 9 is pulled out of the detection box 1, and the pull rope 9 is inserted from top to bottom into the card slot 14 on the card plate 13 of a certain height, and the card block 27 at the lower end of the pull rope 9 is low connected to the lower surface of the card plate 13, so that the pull rope 9 can be fixed, so that the measuring board 6 is suspended on the inner side of the detection box 1, and the measuring board 6 is suspended above the absorbent paper.

[0037] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A device for detecting the water absorption expansion rate of paper, comprising a detection box (1), characterized in that: A plurality of longitudinal bars (2) are arranged above the detection box (1); transverse bars (4) are slidably arranged on the upper sides of the plurality of longitudinal bars (2); the plurality of longitudinal bars (2) and the transverse bars (4) are perpendicular to each other; a water dripping mechanism is slidably arranged on the upper sides of the plurality of transverse bars (4); a temperature control mechanism (20) is arranged at the bottom of the inner side of the detection box (1); a resistance reduction mechanism (19) located above the temperature control mechanism (20) is arranged on the inner side of the detection box (1); paper is arranged on the upper side of the resistance reduction mechanism (19); the resistance reduction mechanism (19) is used to reduce the adhesion between the wet paper and the resistance reduction mechanism; and a measuring plate (6) located on the upper side of the paper is arranged on the inner side of the detection box (1); The temperature control mechanism (20) comprises a heating base (2002) and a temperature sensor (21) arranged at the bottom of the detection box (1); a heating tube (2001) is arranged on the inner side of the heating base (2002); The resistance reduction mechanism (19) comprises a grid support (1901) fixedly arranged on the inner side of the detection box (1) and located above the heating tube (2001), and a plurality of balls (1902) are arranged on the upper side of the grid support (1901); The measuring plate (6) is made of a transparent material, length scale lines (7) are provided on both sides of the measuring plate (6) in the length direction, width scale lines (12) are provided on both sides of the measuring plate (6) in the width direction, and height adjustment components are provided on both sides of the width of the measuring plate (6); The height adjustment assembly comprises a pull ring (8) fixedly arranged on the edge of the measuring plate (6) in the width direction, a pull rope (9) fixedly arranged on the upper side of the pull ring (8), and positioning assemblies for positioning the pull rope (9) are arranged on the front and rear sides of the detection box (1); The positioning assembly comprises a plurality of card plates (13) fixedly arranged at the front and rear sides of the detection box (1); the plurality of card plates (13) are arranged vertically and tilted downward; the lower sides of the plurality of card plates (13) are provided with penetrating card slots (14); and one end of the pull rope (9) is fixedly provided with a card block (27) that engages with the card slot (14).

2. The device for detecting water absorption expansion rate of paper according to claim 1, characterized in that: The dripping mechanism comprises a dripping barrel (5) slidably arranged on a crossbar (4); a dripping pipe (25) is arranged at the bottom of the dripping barrel (5); a valve (26) is arranged on the dripping pipe (25); and a volume measurement scale line (23) is arranged on the side wall of the dripping barrel (5).

3. The device for detecting water absorption expansion rate of paper according to claim 2, characterized in that: A plurality of the cross bars (4) are provided with transverse guide grooves (15) on their inner sides, and transverse sliding blocks (22) are slidably provided on the inner sides of the plurality of the cross bars (15) and are respectively fixedly connected to the drip tubes (5). The edges of the plurality of the cross bars (4) are provided with transverse scale lines (24).

4. The device for detecting water absorption expansion rate of paper according to claim 3, characterized in that: A longitudinal guide groove (3) is provided on the inner side of the plurality of longitudinal rods (2), a longitudinal slider (16) is slidably provided on the inner side of the plurality of longitudinal guide grooves (3) and is respectively fixedly connected to one end of the cross rod (4), a handle (17) is fixedly provided on the upper side of the plurality of longitudinal sliders (16), and a longitudinal scale line (18) is provided on the edge of the plurality of longitudinal rods (2).

5. The device for detecting water absorption expansion rate of paper according to claim 1, characterized in that: The measuring plate (6) is provided with air holes (11) on all sides thereof, and the front and rear sides of the detection box (1) are provided with vertical limit grooves (10) which are slidably matched with the measuring plate (6).

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