Sample cup film sealing device

Abstract

The utility model discloses a sample cup film sealing device which comprises a base and a pressing plate connected with the base, the base is provided with a flat upper surface, the pressing plate is provided with a pressing surface matched with the upper surface of the base, and the upper surface of the base is provided with a plurality of sample cup positioning holes; a sample cup to be subjected to film sealing is placed in the positioning hole, the pressing plate is driven to enable the pressing face of the pressing plate to be close to the upper surface of the base, and the fixing ring clamped to a cup opening of the sample cup is pushed to be connected to the sample cup in a sleeving mode to complete film sealing of the sample cup. A plurality of limiting holes for placing the sample cups are formed in the base, and the fixing rings on the sample cups can be pressed at the same time, so that the sample cups covered with thin films can be assembled at the same time, the assembling and manufacturing speed of the sample cups is increased, standardization of sample cup sealing film manufacturing is guaranteed, and the production efficiency is improved. The sample cup film sealing quality and the sample cup film sealing consistency are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of test article manufacturing, and relates to a sample cup manufacturing and sealing film device. BACKGROUND

[0002] The analysis of the moisture content and the titanium dioxide content in the slurry of the intermediate product in the production process of cellulose diacetate tow is carried out by using near-infrared diffuse reflection and X-ray fluorescence transmission method. Due to the particularity of the slurry form and the volatility of the solvent acetone, the slurry sample cup needs to be used to assist in the analysis.

[0003] The slurry sample cup generally comprises a cup body, a film covering the opening of the cup body, and a fixing ring for fixing the film on the cup opening. The consumption of the slurry sample cup is large in daily detection, and the slurry sample cup needs to be assembled one by one manually, which is time-consuming and laborious. Moreover, the sample cups produced have the problems of low yield, high rework rate, and the like, and the sample cups with poor quality can also cause abnormal detection data and affect the experimental results. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a sample cup sealing film device to realize the standardization and rapid assembly of the slurry sample cup.

[0005] A sample cup sealing film device comprises a base and a pressing plate connected with the base, the base has a flat upper surface, the pressing plate has a pressing surface matched with the upper surface of the base, and a plurality of sample cup positioning holes are arranged on the upper surface of the base; the sample cup to be sealed is placed in the positioning hole, the pressing plate is driven to make the pressing surface close to the upper surface of the base, and the fixing ring clamped on the cup opening of the sample cup is sleeved on the sample cup to complete the sealing of the sample cup.

[0006] Optionally, at least two guide columns perpendicular to the upper surface of the base are connected with the base, and the pressing plate is slidingly connected with the guide columns; and the pressing surface is the lower surface of the pressing plate.

[0007] Optionally, a plurality of sleeve rings corresponding one-to-one with the positioning holes are connected with the pressing surface, and the inner diameter of the sleeve ring is greater than the outer diameter of the fixing ring.

[0008] Optionally, a plurality of limiting holes corresponding one-to-one with the positioning holes are formed on the pressing surface, and the hole diameter of the limiting hole is greater than the outer diameter of the fixing ring.

[0009] Optionally, a plurality of limiting holes corresponding one-to-one with the positioning holes are formed on the pressing surface, and a pressing block and a spring are arranged in the limiting hole, one end of the spring is connected with the pressing block, and the other end is connected with the bottom surface of the limiting hole.

[0010] Optionally, a limiting ring extending radially is connected to the lower part of the limiting hole, the inner diameter of the limiting ring is larger than the outer diameter of the pressing block, and a ring-shaped flange extending radially is connected to the upper part of the pressing block, the outer diameter of the ring-shaped flange is larger than the inner diameter of the limiting ring.

[0011] Optionally, a clamping groove is formed on the lower surface of the pressing block, and the aperture of the clamping groove is larger than the outer diameter of the fixing ring.

[0012] Optionally, a connecting groove is formed on the upper part of the pressing block, and the bottom end of the spring is fixedly connected to the bottom surface of the connecting groove.

[0013] Optionally, a vertical column perpendicular to the upper surface of the base is connected to the base, a cantilever extending radially along the vertical column is connected to the vertical column, and the pressing plate is connected below the cantilever in a liftable manner.

[0014] Optionally, a liftable driving rod is connected to the cantilever, and the pressing plate is connected to the bottom of the driving rod.

[0015] Optionally, a rotating shaft coupled to the driving rod is further arranged on the cantilever, the rotating shaft is rotatably connected to the cantilever and perpendicular to the driving rod, a gear is connected to the rotating shaft, the gear is in meshing connection with a rack connected to one side of the driving rod, one end of the rotating shaft is connected to a crank handle, and a volute spring is connected to the other end of the rotating shaft, the volute spring and the gear are arranged in a receiving cavity formed in the cantilever.

[0016] Optionally, a restoring spring is sleeved outside the guide rod.

[0017] Optionally, a support is fixedly connected to one side of the base, a support rod extending along the width direction of the base is connected to the support, a winding drum is rotatably installed on the support rod, and a film is wound on the winding drum.

[0018] Optionally, a plurality of film pressing rollers extending along the width direction of the base are further installed on the upper surface of the base, the plurality of film pressing rollers are arranged between two adjacent positioning holes respectively, and a gap between the bottom of the film pressing roller and the upper surface of the base has a width greater than the thickness of the film.

[0019] Optionally, a plurality of film pressing rollers extending along the width direction of the base are hung below the pressing plate, the film pressing rollers are hung and connected to two oppositely arranged hanging rods connected to the pressing plate, and the plurality of film pressing rollers on the two sides of the pressing plate are arranged between two adjacent limiting holes respectively, and a gap between the bottom of the film pressing roller and the upper surface of the base has a width greater than the thickness of the film.

[0020] Optionally, a strip-shaped through hole extending along a direction perpendicular to the upper surface of the base is formed on the hanging rod, and the two ends of the film pressing roller are connected in the strip-shaped through hole in a liftable manner.

[0021] Optionally, the pressing plate is hingedly connected to one side of the base, and a surface of the pressing plate close to the upper surface of the base is a pressing surface.

[0022] Optionally, a plurality of limiting holes corresponding to the positioning holes are formed in the lower surface of the pressing plate, and the limiting holes have a diameter greater than an outer diameter of the fixing ring.

[0023] Optionally, a sum of a depth of the positioning hole and a depth of the limiting hole is equal to a height of the sample cup.

[0024] Optionally, a support is fixedly connected to one side of the base, a support rod extending along a width direction of the base is connected to the support, a winding drum is rotatably installed on the support rod, and a film is wound on the winding drum.

[0025] The beneficial effects of the present application include:

[0026] 1. The sample cup film sealing device disclosed in the present application realizes film sealing operation on multiple sample cups by arranging the positioning holes for fixing the sample cups on the base and the pressing plate for pressing the fixing ring to the sample cup, thereby improving the assembly and manufacturing speed of the sample cup, ensuring the standardization of the sample cup film sealing manufacturing, and improving the sample cup film sealing quality and consistency.

[0027] 2. The sample cup film sealing device disclosed in the present application is provided with the winding drum for winding the film and the film pressing roller for guiding the film on the base, and the film can be fully ensured to be relatively flat and stably covered on the bottom of the sample cup before the fixing ring is pressed, which is beneficial to tensioning and fixing the film on the bottom of the sample cup by the fixing ring, thereby ensuring the assembly quality of the sample cup, especially the installation effect of the film, and being beneficial to subsequent test operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a front view of the first embodiment of the sample cup film sealing device disclosed in the present application.

[0029] Figure 2 is Figure 1 a side view of the embodiment.

[0030] Figure 3 is Figure 1 a schematic view of the connection mechanism between the rotating shaft and the driving rod in the embodiment.

[0031] Figure 4 is a three-dimensional schematic view of the second embodiment of the sample cup film sealing device disclosed in the present application.

[0032] In the figure: 1, base; 2, pressing plate; 3, positioning hole; 4, limiting hole; 5, guide rod; 6, winding drum; 7, film pressing roller; 8, stand; 9, cantilever; 10, rotating shaft; 11, driving rod; 12, crank handle; 13, pressing block; 14, reciprocating spring; 15, volute spring; 16, limiting ring; 17, return spring. DETAILED DESCRIPTION

[0033] The utility model is further explained below in combination with the drawings and examples.

[0034] A sample cup is needed when performing near-infrared diffuse reflection and X-ray fluorescence transmission method detection tests, the sample cup comprises a cup body, and a flat and wrinkle-free film needs to be covered on the cup opening of the sample cup before performing the test, and the film covered on the cup opening is fixed by a fixing ring sleeved on the sample cup.

[0035] In order to improve the film sealing efficiency of the sample cup, the utility model provides a sample cup film sealing device.

[0036] As Figures 1-3 shown is a first embodiment of the sample cup film sealing device described in the specification.

[0037] The sample cup film sealing device comprises a base 1 for fixing the sample cup and a pressing block 13 for pressing the fixing ring onto the sample cup. The base 1 has a flat upper surface, and at least two guide rods 5 perpendicular to the upper surface of the base 1 are connected to the upper portion of the base 1. The pressing plate 2 is arranged above the base 1 and is slidingly connected to the guide rods 5, so that the pressing plate 2 can slide along the guide rods 5, and the downward pressure applied to the pressing plate 2 perpendicular to the upper surface thereof can drive the pressing plate 2 to move towards the base 1.

[0038] A plurality of positioning holes 3 arranged at equal intervals are formed on the upper surface of the base 1, the positioning holes 3 are blind holes, the hole diameter of the positioning holes 3 is slightly larger than the diameter of the cup body of the sample cup, the sample cup is placed into the positioning holes 3, and the side wall of the positioning holes 3 can limit the sample cup to move in the horizontal direction.

[0039] The lower surface of the pressing plate 2 is parallel to the upper surface of the base 1, that is, the lower surface of the pressing plate 2 is a pressing surface for applying pressure to the fixing ring, and the orthographic projection of the pressing plate 2 on the upper surface of the base 1 can completely cover the plurality of positioning holes 3, that is, when the pressing plate 2 moves to the upper surface of the base 1 in the direction perpendicular to the upper surface of the base 1, the pressing plate 2 can cover the plurality of positioning holes 3.

[0040] Further, the lower surface of the pressing plate 2 is formed with a plurality of limiting holes 4, which correspond to the positioning holes 3 and are coaxial with the positioning holes 3.

[0041] The limiting holes 4 are downwardly open blind holes, i.e. the limiting holes 4 have bottom surfaces. The diameters of the limiting holes 4 are slightly larger than the outer diameter of the fixing ring, so that the fixing ring can be put into the limiting holes 4. During the film sealing operation of the sample cup, the sample cup to be sealed is placed in the positioning hole 3, the film is covered on the cup mouth of the sample cup, and then the fixing ring is lightly pressed and sleeved on the outside of the cup mouth to preliminarily position the fixing ring, thereby reducing the displacement of the fixing ring during the subsequent pressing process. Then the pressing plate 2 is driven to gradually descend, and finally the pressing plate 2 presses the fixing ring to be sleeved on the outside of the sample cup to complete the film sealing. During the descending process of the pressing plate 2, the fixing ring enters the limiting hole 4, the sidewall of the limiting hole 4 can limit the displacement of the fixing ring in the direction perpendicular to the guide rod 5, and the bottom surface of the limiting hole 4 can apply sufficient pressure to the fixing ring, so that the fixing ring can be sleeved on the sample cup.

[0042] Further, a restoring spring 17 is sleeved on the outside of the guide column, and after the pressing plate 2 presses the fixing ring to the sample cup, the restoring spring 17 rebounds to push the pressing plate 2 to reset.

[0043] In another exemplary embodiment, a plurality of protruding sleeves are connected to the lower surface of the pressing plate 2, the inner diameters of the sleeves are slightly larger than the outer diameter of the fixing ring, so as to limit the displacement of the fixing ring in the plane parallel to the lower surface of the pressing plate 2, and the depth of the sleeve is not greater than the height of the part of the cup body of the sample cup that is higher than the upper surface of the base 1, i.e. when the pressing plate 2 moves to the position closest to the base 1, the top of the sample cup can abut against the surface of the pressing plate 2 in the sleeve, so as to ensure that the fixing ring can be pressed to the outside of the sample cup.

[0044] In another exemplary embodiment, a pressing block 13 is arranged in the limiting hole 4, the cross-sectional dimension of the pressing block 13 is slightly smaller than the cross-sectional dimension of the limiting hole 4, so that the pressing block 13 can only move in the axial direction of the limiting hole 4. A spring is further arranged in the pressing block 13, one end of the spring is connected to the pressing block 13, and the other end is connected to the bottom surface of the limiting hole 4, in other words, the pressing block 13 can move under the action of the spring.

[0045] The lower surface of the pressing block 13 is further formed with a clamping groove having a shape substantially same as the fixing ring, and the diameter of the clamping groove is slightly larger than the outer diameter of the fixing ring. When the fixing ring enters the clamping groove, the fixing ring is limited in the clamping groove and is difficult to move in the radial direction of the fixing ring.

[0046] The lower hole wall of the limiting hole 4 is connected with a radially extending limiting ring 16, and the top peripheral part of the pressing block 13 is connected with a radially extending annular flange, the outer diameter of the annular flange is slightly smaller than the hole diameter of the limiting hole 4, and the outer diameter of the annular flange is greater than the inner diameter of the limiting ring 16, the lower surface of the annular flange can abut against the top surface of the limiting ring 16, so that the annular flange and the limiting ring 16 form a limiting structure, so that the pressing block 13 can only move in the limiting hole 4 and can only move in the area between the top surface of the limiting ring 16 and the bottom surface of the limiting hole 4. When the lower surface of the annular flange and the top surface of the limiting ring 16 abut against each other, the lower part of the pressing block 13 protrudes from the limiting hole 4. The reciprocating spring 14 is always in a compressed state, that is, the lower surface of the annular flange of the upper part of the pressing block 13 always abuts against the top surface of the limiting ring 16 under the action of the reciprocating spring 14, and the lower part of the pressing block 13 always protrudes from the limiting hole 4.

[0047] The reciprocating spring 14 arranged in the limiting hole 4 can provide a buffering damping effect during the pressing process of the pressing plate 2, thereby avoiding the problem of sample cup deformation and damage caused by excessive instantaneous pressure during the pressing process. In addition, different sample cups may have inconsistent cup heights due to existing machining precision errors, and the reciprocating spring 14 in the limiting hole 4 can provide compensation when pressing these sample cups, thereby ensuring the sealing effect of the sample cup.

[0048] Optionally, the top of the pressing block 13 is formed with a connecting groove, and the bottom of the reciprocating spring 14 is fixedly connected in the connecting groove. Since the pressing block 13 exerts pressure on the fixed ring, the reaction force of the fixed ring acting on the pressing block 13 also compresses the reciprocating spring 14, and the bottom of the reciprocating spring 14 is connected with the bottom of the connecting groove, which can avoid excessive compression of the reciprocating spring 14 and damage to the reciprocating spring 14, and can also make the maximum displacement of the pressing block 13 to abut against the top of the limiting hole 4, that is, the pressing block 13 can obtain a larger stroke,

[0049] The sample cup sealing film device is used in the following way: firstly, the film is covered on the bottom of the sample cup and is flattened, and then the fixing ring is placed on the film covering the cup mouth of the sample cup, and the fixing ring is aligned with the cup mouth of the sample cup and is clamped on the cup mouth of the sample cup, and then the pressing plate 2 is pushed to move along the guide rod 5 towards the base 1, and since the axis of the clamping groove and the axis of the positioning hole 3 are substantially in a straight line, as the pressing block 13 continuously moves towards the base 1, the fixing ring enters the clamping groove of the pressing block 13, and the radial displacement of the fixing ring entering the clamping groove is limited by the inner wall of the clamping groove, and then the pressing plate 2 continues to drop, the bottom of the clamping groove contacts the fixing ring, and the fixing ring is pressed down, and the fixing ring moves downwards along the side wall of the sample cup under the pressure of the pressing block 13, so that the fixing ring is finally sleeved on the side of the sample cup. In this process, the fixing ring moves downwards, the film covering the sample cup is further tightened and flattened, and is fixed on the sample cup by the fixing ring, so as to seal the cup mouth of the sample cup.

[0050] It should be noted that after the fixing ring is fixed on the sample cup by using the sample cup sealing film device disclosed by the utility model, the connection between the film fixed by the fixing ring and the main body of the film is manually cut off under the condition that there is sufficient film margin, so as to obtain a single sealed sample cup.

[0051] The base 1 is connected with a column 8 and a cantilever 9 mounted on the column 8, the column 8 is perpendicular to the upper surface of the base 1, the front end surface of the cantilever 9 extends in a direction perpendicular to the column 8, and the column 8 is connected with the rear part of the cantilever 9. The cantilever 9 is provided with a driving mechanism for driving the pressing plate 2 to ascend and descend along the axial direction parallel to the guide rod 5.

[0052] The driving mechanism comprises a driving rod 11 and a rotating shaft 10 coupled with the driving rod 11, the driving rod 11 is parallel to the guide rod 5 and is connected in the through hole formed in the cantilever 9 in a manner that can ascend and descend, and the pressing plate 2 is connected to the bottom of the driving rod 11. In other words, the pressing plate 2 can be driven to ascend and descend by driving the driving rod 11.

[0053] The rotating shaft 10 is rotationally connected to the cantilever 9 and is perpendicular to the driving rod 11, and a gear is connected to the rotating shaft 10, and the gear is arranged in the accommodating cavity formed in the cantilever 9. A rack is connected to one side of the driving rod 11 and is engaged with the gear, so that when the rotating shaft 10 is driven to rotate, the rotating shaft 10 can drive the driving rod 11 to ascend and descend, thereby achieving the ascending and descending of the pressing plate 2.

[0054] The rotation shaft 10 extends from one side of the cantilever 9, and a handle 12 is connected to the rotation shaft 10, and the handle 12 can drive the driving rod 11 to move along the axis of the through hole.

[0055] Further, a volute spring 15 is arranged in the accommodating cavity, and the rotation shaft 10 is connected to the volute spring 15. When the handle 12 is rotated to drive the driving rod 11 to move downward, the volute spring 15 is compressed synchronously. Therefore, when the force acting on the handle 12 disappears, the volute spring 15 drives the handle 12 and the driving rod 11 to return to the original position.

[0056] A support is further arranged on one side of the base 1, and a support rod extending along the width direction of the base 1 is connected to the support. A winding drum 6 is rotatably connected to the support, and a film is wound on the winding drum 6. Since the winding drum 6 is arranged on one side of the base 1, and the axis direction of the winding drum 6 is parallel to the width direction of the base 1, the film on the winding drum 6 can be pulled from one side of the base 1 to the other side when the sample cups are sealed. The pulled film can cover all the sample cups placed on the base 1, and the synchronous film covering of multiple sample cups is realized, so that the film covering operation efficiency is improved.

[0057] Further, a film pressing roller 7 is arranged between two adjacent positioning holes 3, and the two ends of the film pressing roller 7 extend along the width direction of the base 1. The two ends of the film pressing roller 7 are rotatably connected to two opposite supports arranged on the upper surface of the base 1. The bottom of the film pressing roller 7 and the surface of the base 1 form a gap, and the gap is larger than the thickness of the film. Therefore, the film can pass through the gap. It should be noted that the bottom of the film pressing roller 7 is always lower than the height of the cup opening of the sample cup in the positioning hole 3, so that the film passing through the gap at the bottom of the film pressing roller 7 is tensioned, the flatness of the film covering the cup opening of the sample cup is improved, and the film tensioning and flatness maintaining during the process of the fixing ring descending along the side wall of the sample cup after being pressed improves the film sealing quality.

[0058] In another alternative embodiment, the film pressing roller 7 can also be hung on the pressing plate 2, and the pressing plate 2 is connected with a plurality of sets of hanging connectors, and each set of hanging connectors is connected with one film pressing roller 7. The hanging connector includes two opposite hanging rods connected on both sides of the pressing plate 2, and the two ends of the film pressing roller 7 are connected to the two hanging rods. Further, the relative height of the film pressing roller 7 and the pressing plate 2 is adjustable. Specifically, the hanging rod is provided with a strip-shaped through hole perpendicular to the upper surface of the base 1, and the width of the strip-shaped through hole is slightly larger than the diameter of the end of the film pressing roller 7, so that the end of the film pressing roller 7 can be inserted into the strip-shaped through hole. The end of the film pressing roller 7 is formed with a threaded hole, and a positioning screw is screwed into the threaded hole. The width of the nut of the positioning screw is greater than the width of the strip-shaped through hole, so that the film pressing roller 7 can be fixed on the hanging rod with the strip-shaped through hole by the positioning screw, and the relative height of the film pressing roller 7 below the pressing plate 2 can also be adjusted as needed.

[0059] It should be understood that the height of the film pressing roller 7 should not affect the pressing of the pressing plate 2 on the fixed ring, so the height of the film pressing roller 7 also needs to be adjusted according to different sample cup sizes and other factors.

[0060] Second embodiment:

[0061] As shown in Figure 4 The upper surface of the base 1 is formed with a positioning hole 3, which is slightly larger than the diameter of the cup opening of the sample cup, and the sample cup can be placed into the positioning hole 3 to limit the radial displacement of the sample cup. The depth of the positioning hole 3 is substantially the same as the height of the sample cup, in other words, after the sample cup is placed into the positioning hole 3, the top end of the sample cup is flush with the top of the positioning hole 3.

[0062] The base 1 is connected with a U-shaped support, one side of the U-shaped support is connected to the base 1, and the other side is suspended and extends along the width direction of the base 1, and a winding drum 6 is rotatably connected to the other side. The winding drum 6 is wound with a film, and the width of the film is substantially the same as the width of the base 1. The length direction of the support arm is perpendicular to the length direction of the base 1, and the support arm with the winding drum 6 is arranged on one side of the base 1, so that the film pulled out from the winding drum 6 can cover the upper surface of the base 1.

[0063] In the embodiment, the pressing plate 2 is hingedly connected to the base 1 and can cover the upper surface of the base 1, thus the side of the pressing plate 2 close to the base 1 is the pressing surface, and a plurality of limiting holes 4 corresponding to the positioning holes 3 are formed on the pressing surface of the pressing plate 2, the diameter of the limiting holes 4 is larger than the outer diameter of the fixing ring, and the depth of the positioning holes 3 and the depth of the limiting holes 4 are consistent with the height of the sample cup, thus when the pressing plate 2 is closed, the fixing ring is clamped in the limiting holes 4, and then the fixing ring is sleeved on the cup opening of the sample cup under the pressing of the pressing plate 2.

[0064] When the second embodiment is used, the pressing plate 2 is pulled open, the sample cup is placed in the positioning hole 3, the film is pulled out from the roll 6 to cover the sample cup, the fixing ring is clamped on the cup opening of the sample cup covered by the film, the pressing plate 2 is closed to make the fixing ring sink into the limiting hole 4, the pressing plate 2 is continuously rotated to make the pressing plate 2 continuously apply pressure to the fixing ring, and the fixing ring is sleeved on the sample cup to realize the film sealing of the cup opening of the sample cup.

[0065] The above related description and the description of the embodiments are for facilitating the ordinary skilled in the art to understand and apply the utility model. The skilled in the art can obviously easily make various modifications to these contents, and apply the general principles described herein to other embodiments without creative labor. The utility model is not limited to the above related description and the description of the embodiments, the skilled in the art can make improvements and modifications according to the disclosure of the utility model without departing from the scope of the utility model.

Claims

1. A sample cup sealer apparatus, characterized by, The base has a flat upper surface, and the pressing plate has a pressing surface matched with the upper surface of the base. The base is connected with at least two guide rods perpendicular to the upper surface of the base, and the pressing plate is slidingly connected with the guide rods. The pressing surface is the lower surface of the pressing plate, and the pressing surface is formed with limiting holes corresponding to the positioning holes.

2. The sample cup closure device of claim 1, wherein: The limiting holes are provided with pressing blocks and springs, one end of the spring is connected with the pressing block, and the other end is connected with the bottom surface of the limiting hole.

3. The sample cup closure device of claim 1, wherein: The base is connected with a vertical column perpendicular to the upper surface of the base, the vertical column is connected with a cantilever extending radially along the vertical column, the pressing plate is connected below the cantilever in a lifting manner, the cantilever is connected with a lifting driving rod in a lifting manner, the pressing plate is connected with the bottom of the driving rod, the cantilever is further provided with a rotating shaft coupled with the driving rod, the rotating shaft is rotatably connected with the cantilever and perpendicular to the driving rod, the rotating shaft is connected with a gear, and the gear is meshingly connected with a rack connected with one side of the driving rod.

4. The sample cup closure device of claim 1, wherein: One end of the rotating shaft is connected with a crank, and the other end is connected with a spiral spring.

5. The sample cup closure device of claim 4, wherein: The pressing surface is connected with a plurality of sleeves corresponding to the positioning holes.

6. The sample cup closure device of claim 1, wherein: The pressing surface is formed with limiting holes corresponding to the positioning holes.

7. The sample cup closure device of claim 1, wherein: The lower part of the limiting hole is connected with a radial limiting ring, the inner diameter of the limiting ring is greater than the outer diameter of the pressing block, the upper part of the pressing block is connected with a radial annular flange, and the outer diameter of the annular flange is greater than the inner diameter of the limiting ring.

8. The sample cup closure device of claim 1, wherein: The lower surface of the pressing block is formed with a clamping groove, and the hole diameter of the clamping groove is greater than the outer diameter of the fixing ring.

9. The sample cup closure device of claim 8, wherein: The upper part of the pressing block is formed with a connecting groove, and the bottom end of the spring is fixedly connected with the bottom surface of the connecting groove.

10. The sample cup closure device of claim 8, wherein: The outer side of the guide rod is sleeved with a restoring spring.

11. The sample cup closure device of claim 10, wherein: One side of the base is fixedly connected with a support, the support is connected with a support rod extending along the width direction of the base, a winding drum is rotatably installed on the support rod, and a film is wound on the winding drum. The upper surface of the base is further provided with a plurality of film pressing rollers extending along the width direction of the base, and the plurality of film pressing rollers are respectively arranged between two adjacent positioning holes. The lower surface of the pressing plate is hung with a plurality of film pressing rollers extending along the width direction of the base. The hanging rod is formed with a strip-shaped through hole extending along the direction perpendicular to the upper surface of the base, and the two ends of the film pressing roller are connected in the strip-shaped through hole in a lifting manner. The hanging rod is formed with a strip-shaped through hole extending along the direction perpendicular to the upper surface of the base, and the two ends of the film pressing roller are connected in the strip-shaped through hole in a lifting manner.

12. The sample cup closure device of claim 1, wherein: The pressing plate is hingedly connected to one side of the base, and the surface of the pressing plate close to the upper surface of the base is a pressing surface.

13. The sample cup closure device of claim 12, wherein: A plurality of limiting holes corresponding to the positioning holes are formed in the lower surface of the pressing plate, and the diameter of the limiting holes is greater than the outer diameter of the fixing ring.

14. The sample cup closure device of claim 13, wherein: The sum of the depth of the positioning hole and the depth of the limiting hole is equal to the height of the sample cup.

15. The sample cup closure device of claim 12, wherein: A support is fixedly connected to one side of the base, a support rod extending along the width direction of the base is connected to the support, a winding drum is rotatably installed on the support rod, and a film is wound on the winding drum.

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