CN113188914A - Toughness testing device and method for platelet storage bag - Google Patents
Toughness testing device and method for platelet storage bag Download PDFInfo
- Publication number
- CN113188914A CN113188914A CN202110466741.9A CN202110466741A CN113188914A CN 113188914 A CN113188914 A CN 113188914A CN 202110466741 A CN202110466741 A CN 202110466741A CN 113188914 A CN113188914 A CN 113188914A
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- pressure
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- platelet
- toughness
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- 238000012360 testing method Methods 0.000 title claims abstract description 60
- 238000003860 storage Methods 0.000 title claims description 42
- 238000000034 method Methods 0.000 title claims description 7
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 238000004321 preservation Methods 0.000 claims abstract description 35
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 238000001125 extrusion Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 46
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009778 extrusion testing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
Abstract
The invention provides a toughness testing device and a testing method of a platelet preservation bag, which comprise a base, a pressure mechanism, a pressure testing mechanism and a quantitative injection mechanism, wherein the pressure mechanism is arranged above the base and used for applying extrusion force to the preservation bag, the pressure testing mechanism is used for calculating the pressure value applied to the preservation bag, and the quantitative injection mechanism is used for quantitatively injecting a testing fluid into the preservation bag.
Description
Technical Field
The invention discloses a device and a method for testing the toughness of a platelet preservation bag, and relates to the technical field of production and processing equipment of platelet preservation bags.
Background
The platelet storage bag is used for storing platelets in blood, is mostly made of sterile and nontoxic modified polyolefin materials, and is formed by edge sealing through a hot pressing process. In the prior art, the toughness test can not be reasonably and effectively carried out after the production of the platelet preservation bag is finished, namely the toughness test comprises the test of the tearing resistance and the maximum extrusion resistance of the platelet preservation bag so as to ensure the normal use of the platelet preservation bag, reduce the breakage rate and be beneficial to the improvement of the later stage; among them, the best method is to test the anti-extrusion capability of the platelet storage bag, which can best reflect the quality of the storage bag in practical use, and a toughness testing device and a testing method for the platelet storage bag are urgently needed to solve the problems.
Disclosure of Invention
The device and the method have reasonable structure, and can accurately obtain the optimal stress state and the optimal injection flow of the storage bag by utilizing a pressing block in a unit area to perform extrusion test on the storage bag injected with different fluid quantities, and can also test the quality of the storage bag.
In order to achieve the purpose, the invention is realized by the following technical scheme: the device for testing the toughness of the platelet storage bag comprises a base, a pressure mechanism, a pressure testing mechanism and a quantitative injection mechanism, wherein the pressure mechanism is arranged above the base and used for applying extrusion force to the storage bag, the pressure testing mechanism is used for calculating the pressure value applied to the storage bag, and the quantitative injection mechanism is used for quantitatively injecting a test fluid into the storage bag.
Further, the pressure mechanism comprises a movable plate, a supporting plate, a pressing block and an electric telescopic rod, the electric telescopic rod is arranged at the four corners above the base, the supporting plate is arranged at the upper end of the electric telescopic rod, a power shaft of the electric telescopic rod penetrates through the supporting plate to be connected with the movable plate, a supporting groove is formed in the upper surface of the supporting plate, and the pressing block is arranged at the bottom of the movable plate.
Further, the pressure testing mechanism comprises a pressure display, a pressure sensor and a single chip microcomputer, the pressure display is installed on the base, the pressure sensor is arranged at the bottom of the bracket, the output end of the pressure sensor is connected with the single chip microcomputer, and the output end of the single chip microcomputer is connected with the pressure display.
Further, the quantitative injection mechanism comprises an injection nozzle and a flow meter, the injection nozzle is arranged on one side of the bracket, and the flow meter is connected to the input end of the injection nozzle.
Furthermore, the press block is of a cylindrical structure, a threaded hole is formed in the top of the press block, a fastening screw rod penetrates through the top thread of the movable plate, and the lower end of the fastening screw rod is connected with the press block in a threaded screwing mode.
Furthermore, a power shaft of the electric telescopic rod is sleeved with a return spring.
Further, a lifting button is arranged above the base, the lifting button is a positive and negative switch, the input end of the lifting button is connected with an external direct-current power supply, the output end of the lifting button is connected with an electric telescopic rod respectively, and the electric telescopic rods are arranged in parallel.
Furthermore, the outside of injection nozzle is provided with the ribbon, the input of flowmeter is provided with speed governing valve, the flowmeter passes through speed governing valve and is connected with external test fluid source.
Further, the testing method of the toughness testing device of the platelet preservation bag comprises the following steps:
step A, quantitatively injecting fluid into the platelet preservation bag:
step A1, connecting the input end of a lifting button with an external direct current power supply, pressing the lifting button, and lifting the pressing block to the top by a power shaft of an electric telescopic rod;
step A2, taking a platelet preservation bag, sleeving an opening on an injection nozzle, winding by using a binding tape, and binding the opening of the platelet preservation bag and the injection nozzle tightly;
step A3, connecting the input end of the speed regulating valve with an external test fluid source through a pipeline;
step A4, opening a speed regulating valve according to the step A3, and controlling the fluid injection speed;
a5, observing the flow value Q of the flowmeter until the flow value Q reaches a proper test flow, and closing the speed regulating valve;
step A6, setting the initial pressure value of the pressure display at F1;
step B, applying pressure and pressing:
step B1, taking the pressing block, and calculating the bottom area of the pressing block to be S;
step B2, pressing down a lifting button, retracting a power shaft of the electric telescopic rod, and driving a pressing block to extrude the storage bag downwards;
step B3, watching the reading of the pressure display screen until the moment when the storage bag is broken, wherein the pressure value of the pressure display is F2;
step B4, obtaining a pressure value P' = (F2-F1)/S of the preservation bag according to a pressure formula P (pressure) = F (force)/S (force area);
and step B5, finally obtaining the maximum pressure value P' = (F2-F1)/S of the fluid in the platelet storage bag under the condition of the unit flow value Q.
The invention has the beneficial effects that:
1. the testing is flexible, the maximum pressure value P' = F2-F1)/S of the fluid in the platelet storage bag under the condition of the unit flow value Q is obtained by pressing the pressure bearing area S under the condition of the flow values Q of different units, applying the initial pressure value F1, applying the pressure value F2 after pressure application, and according to the pressure formula P (pressure) = F (stress)/S (stress area);
2. the invention can accurately obtain the best stress state and the most proper injection flow of the storage bag by utilizing the pressing block in unit area to carry out the extrusion test on the storage bag injected with different fluid quantities, and can also test the quality of the storage bag;
3. the storage bag pressing test device utilizes the pressing blocks with different areas to perform pressing test on the storage bag, the pressing blocks are of cylindrical structures, the edges are smooth, local stress extrusion is prevented, and stress is uniform.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of a toughness testing device of a platelet preserving bag according to the present invention;
FIG. 2 is a front sectional view of a device for testing the toughness of a platelet storage bag according to the present invention;
FIG. 3 is a schematic structural diagram of a pressing block in the toughness testing apparatus of a platelet storage bag according to the present invention;
FIG. 4 is a schematic diagram of the connection of the pressure testing mechanism in the toughness testing apparatus of the platelet preserving bag according to the present invention;
in the figure: the device comprises a movable plate 1, a power shaft 2, a return spring 21, a supporting plate 3, an electric telescopic rod 4, a base 5, a pressure display 6, a lifting button 61, a bracket 7, a pressure sensor 71, a quantitative injection mechanism 8, a binding belt 81, an injection nozzle 82, a flowmeter 83, a speed regulation valve 84, a pressing block 9 and a fastening screw rod 10.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a toughness testing arrangement of platelet preservation bag, includes base 5 and sets up and be used for applying the pressure mechanism of extrusion force to preserving the bag, be used for calculating the pressure testing mechanism that the preservation bag applyed the pressure value, be used for to preserving the quantitative injection mechanism 8 of quantitative injection test fluid in the bag, has solved the problem that the platelet preservation bag in the past lacks effectual toughness testing arrangement.
The specific working principle is as follows: firstly, a lifting button 61 is pressed down, and a power shaft 2 of an electric telescopic rod 4 lifts a pressing block 9 to the top; then taking a platelet preservation bag, sleeving the mouth part of the platelet preservation bag on the injection nozzle 82, winding the platelet preservation bag by using a binding tape 81, and tightly binding the mouth part of the platelet preservation bag with the injection nozzle 82 for injecting test fluid into the platelet preservation bag;
then, the input end of the speed regulating valve 84 is connected with an external test fluid source through a pipeline, the speed regulating valve 84 is opened, the fluid injection speed is controlled, the flow value Q of the flowmeter 83 is observed to reach a proper test flow, the speed regulating valve 84 is closed, and the initial pressure value of the pressure display 6 at the moment is recorded as F1;
then, taking the pressing block 9, locking the pressing block 9 with the movable plate 1 through the fastening screw 10, and recording and calculating the bottom area S of the pressing block 9; then, the lifting button 61 is pressed, the power shaft 2 of the electric telescopic rod 4 retracts, the pressing block 9 is driven to downwards extrude the storage bag, the reading of the pressure display screen is watched all the time until the storage bag is broken, and the pressure value of the pressure display 6 at the moment is recorded as F2;
according to the above operation, the maximum pressure value P' = (F2-F1)/S of the fluid in the platelet storage bag under the condition of the unit flow rate value Q is obtained according to the pressure formula P (pressure) = F (force)/S (force area) in the case of the flow rate value Q of different units by repeating the operation for a plurality of times.
The pressing block 9 of the invention is of a cylindrical structure, has smooth edges, prevents local stress extrusion and ensures uniform stress.
The power shaft 2 of the electric telescopic rod 4 is sleeved with the reset spring 21, so that the effect of assisting the reset of the power shaft 2 of the electric telescopic rod 4 is achieved.
The bandage 81 is arranged on the outer side of the injection nozzle 82, so that the mouth of the platelet storage bag is conveniently and tightly bound with the injection nozzle 82.
In addition, the invention provides a testing method for the toughness of the platelet preservation bag, which comprises the following steps:
step A, quantitatively injecting fluid into the platelet preservation bag:
step A1, connecting the input end of the lifting button 61 with an external direct current power supply, pressing the lifting button 61, and lifting the pressing block 9 to the top by the power shaft 2 of the electric telescopic rod 4;
step A2, taking a platelet preservation bag, sleeving an opening on an injection nozzle 82, winding by using a binding tape 81, and tightly binding the opening of the platelet preservation bag and the injection nozzle 82;
step A3, connecting the input end of the speed regulating valve 84 with an external test fluid source through a pipeline;
step A4, according to the step A3, opening the speed regulating valve 84 and controlling the fluid injection speed;
step A5, observing the flow value Q of the flowmeter 83 until the flow value Q reaches a proper test flow, and closing the speed regulating valve 84;
step A6, wherein the initial pressure value of the pressure display 6 at the moment is F1;
step B, applying pressure and pressing:
step B1, taking the pressing block 9, and calculating the bottom area of the pressing block 9 as S;
step B2, pressing the lifting button 61, retracting the power shaft 2 of the electric telescopic rod 4, and driving the pressing block 9 to extrude the storage bag downwards;
step B3, watching the reading of the pressure display screen until the moment when the storage bag is broken, wherein the pressure value of the pressure display 6 is F2;
step B4, obtaining a pressure value P' = (F2-F1)/S of the preservation bag according to a pressure formula P (pressure) = F (force)/S (force area);
and step B5, finally obtaining the maximum pressure value P' = (F2-F1)/S of the fluid in the platelet storage bag under the condition of the unit flow value Q.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a toughness testing arrangement of platelet preservation bag which characterized in that: comprises a base (5), a pressure mechanism arranged above the base (5) and used for applying extrusion force to the preservation bag, a pressure testing mechanism used for calculating the pressure value applied to the preservation bag, and a quantitative injection mechanism (8) used for quantitatively injecting testing fluid into the preservation bag.
2. The apparatus for testing the toughness of a platelet storage bag according to claim 1, wherein: the pressure mechanism comprises a movable plate (1), a supporting plate (3), a pressing block (9) and an electric telescopic rod (4), wherein the electric telescopic rod (4) is arranged at the four corners above a base (5), the supporting plate (3) is arranged at the upper end of the electric telescopic rod (4), a power shaft (2) of the electric telescopic rod (4) penetrates through the supporting plate (3) to be connected with the movable plate (1), a supporting groove (7) is formed in the upper surface of the supporting plate (3), and the pressing block (9) is arranged at the bottom of the movable plate (1).
3. The apparatus for testing the toughness of a platelet storage bag according to claim 1, wherein: the pressure testing mechanism comprises a pressure display (6), a pressure sensor (71) and a single chip microcomputer, the pressure display (6) is installed on the base (5), the pressure sensor (71) is arranged at the bottom of the bracket (7), the output end of the pressure sensor (71) is connected with the single chip microcomputer, and the output end of the single chip microcomputer is connected with the pressure display (6).
4. The apparatus for testing the toughness of a platelet storage bag according to claim 1, wherein: the quantitative injection mechanism (8) comprises an injection nozzle (82) and a flow meter (83), the injection nozzle (82) is arranged on one side of the bracket (7), and the flow meter (83) is connected to the input end of the injection nozzle (82).
5. The apparatus for testing the toughness of a platelet storage bag according to claim 2, wherein: the pressing block (9) is of a cylindrical structure, a threaded hole is formed in the top of the pressing block (9), a fastening screw rod (10) penetrates through the top thread of the movable plate (1), and the lower end of the fastening screw rod (10) is connected with the pressing block (9) in a threaded screwing mode.
6. The apparatus for testing the toughness of a platelet storage bag according to claim 2, wherein: and a power shaft (2) of the electric telescopic rod (4) is sleeved with a return spring (21).
7. The apparatus for testing the toughness of a platelet storage bag according to claim 1 or 3, wherein: the top of base (5) is provided with lifting button (61), and lifting button (61) are positive and negative switch that connects respectively, lifting button's (61) input is connected with external DC power supply, lifting button (61) output is connected with electric telescopic handle (4) respectively, and is a plurality of electric telescopic handle (4) are parallelly connected the setting.
8. The apparatus for testing the toughness of a platelet storage bag according to claim 4, wherein: the outside of injection nozzle (82) is provided with ribbon (81), the input of flowmeter (83) is provided with speed governing valve (84), flowmeter (83) are connected with external test fluid source through speed governing valve (84).
9. The method for testing the toughness test device of the platelet storage bag according to any one of claims 1 to 8, comprising the steps of:
step A, quantitatively injecting fluid into the platelet preservation bag:
step A1, connecting the input end of a lifting button (61) with an external direct current power supply, pressing the lifting button (61), and lifting the pressing block (9) to the top by a power shaft (2) of an electric telescopic rod (4);
step A2, taking a platelet preservation bag, sleeving an opening on an injection nozzle (82), winding by using a binding tape (81), and tightly binding the opening of the platelet preservation bag and the injection nozzle (82);
step A3, connecting the input end of a speed regulating valve (84) with an external test fluid source through a pipeline;
step A4, according to the step A3, opening a speed regulating valve (84) and controlling the fluid injection speed;
a5, observing the flow value Q of the flow meter (83) until the flow value Q reaches a proper test flow, and closing the speed regulating valve (84);
a6, setting the initial pressure value of the pressure display (6) at the moment to be F1;
applying pressure and pressing:
step B1, taking the pressing block (9), and calculating the bottom area of the pressing block (9) as S;
step B2, pressing the lifting button (61), retracting the power shaft (2) of the electric telescopic rod (4) to drive the pressing block (9) to extrude the storage bag downwards;
step B3, watching the reading of the pressure display screen until the moment when the storage bag is broken, wherein the pressure value of the pressure display (6) is F2;
step B4, obtaining a pressure value P' = (F2-F1)/S of the preservation bag according to a pressure formula P (pressure) = F (force)/S (force area);
and step B5, finally obtaining the maximum pressure value P' = (F2-F1)/S of the fluid in the platelet storage bag under the condition of the unit flow value Q.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110466741.9A CN113188914A (en) | 2021-04-28 | 2021-04-28 | Toughness testing device and method for platelet storage bag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110466741.9A CN113188914A (en) | 2021-04-28 | 2021-04-28 | Toughness testing device and method for platelet storage bag |
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Application publication date: 20210730 |
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