Simulated eggshell puncture test device

Abstract

The application provides a simulation eggshell perforation test device, which comprises a simulation eggshell and a perforation device for perforating a preset perforation position of the simulation eggshell. The simulation eggshell is a plurality of times magnified eggshell according to the proportion of an egg (for example, a chicken egg), so that the problem that the size of the egg is small and a stress detection piece cannot be attached to the surface of the egg or the detection data of the attached stress detection piece is inaccurate is solved. After the simulation eggshell is magnified according to the proportion, the size of the simulation eggshell is much larger than that of the egg, so that the stress detection piece is conveniently attached. After the stress detection piece is attached to the simulation eggshell, the simulation eggshell is perforated by using the perforation device. According to the data detected by the stress detection piece, the most suitable perforation condition is analyzed, so that the crack generation during the perforation of the eggshell is reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of egg embryo perforation, in particular to a simulation eggshell perforation test device. BACKGROUND

[0002] A large number of vaccines, such as human influenza vaccines (such as H1N1 influenza A vaccine), rabies vaccines, pediatric measles vaccines, mumps virus serum, influenza vaccines (i.e. avian influenza vaccines) for poultry (chickens, ducks, geese, etc.), chicken newcastle disease vaccines, infectious bronchitis vaccines, etc., all need to be cultured in 9-day-old chicken embryos (fertilized eggs). Using 9-day-old chicken embryos as a culture medium, viruses can be inoculated into chicken embryos, which can be used for virus isolation, virus multiplication, virus titering, neutralization tests, and antigen and vaccine production.

[0003] In related technologies, the process of culturing vaccines in chicken embryos includes using an impact head with a diameter of 2-3 millimeters to perforate the eggshell of a 9-day-old chicken embryo. After completing the eggshell perforation, the needle injects the virus strain into the live chicken embryo, and then the virus strain grows in the chicken embryo. However, in the process of perforating the eggshell with the impact head, cracks are generated in the eggshell, and external bacteria can enter the chicken embryo through the cracks, resulting in cultivation failure (the waste embryo rate is as high as 4-5%), and the same batch of viruses is contaminated during the later collection of allantoic fluid, causing huge economic losses.

[0004] At present, there is no good solution to the problem that cracks are easily generated in the process of perforating the eggshell. SUMMARY

[0005] The embodiment of the present application provides a simulation eggshell perforation test device to solve the technical problem that there is no good solution to the problem that cracks are easily generated in the process of perforating the eggshell.

[0006] The embodiment of the present application provides the following technical solutions to solve the above technical problem:

[0007] The embodiment of the present application provides a simulation eggshell perforation test device, which comprises:

[0008] The simulation eggshell is an eggshell enlarged by a plurality of times according to the proportion of an egg, and a stress detection piece is arranged on the simulation eggshell, and the stress detection piece is configured to detect the stress of a preset stress detection position of the simulation eggshell.

[0009] The perforation device can perforate a preset perforation position of the simulation eggshell.

[0010] The simulation eggshell puncture test device provided by the embodiment of the present application comprises a simulation eggshell and a puncture device for puncturing a preset puncture position of the simulation eggshell. The simulation eggshell is a scaled-up eggshell of an egg (for example, a chicken egg) by multiple times. Thus, the problem that the egg is too small to paste a stress detection piece on the surface of the egg or the detection data of the pasted stress detection piece is inaccurate is solved. After the simulation eggshell is scaled up, the size of the simulation eggshell is much larger than that of the egg, and the stress detection piece is conveniently pasted. After the stress detection piece is pasted on the simulation eggshell, the simulation eggshell is punctured by using the puncture device. The most suitable puncture condition is analyzed according to the detection data of the stress detection piece, so as to reduce the crack generation when the eggshell is punctured.

[0011] In a possible implementation, the puncture device comprises a marble and a marble launching mechanism. The marble launching mechanism launches the marble to the preset puncture position of the simulation eggshell and makes the marble hit the simulation eggshell at the preset puncture position.

[0012] The simulation eggshell puncture test device further comprises an eggshell supporting mechanism and a detection device.

[0013] The eggshell supporting mechanism comprises a base, an egg holder, and an elastic piece arranged between the base and the egg holder. The egg holder is configured to place the simulation eggshell.

[0014] The detection device comprises a marble speed detection device and an elastic piece compression detection device. The marble speed detection device is configured to detect the launching speed of the marble. The elastic piece compression detection device is configured to detect the compression amount of the elastic piece.

[0015] In a possible implementation, the marble launching mechanism is a friction wheel launching device.

[0016] In a possible implementation, the elastic piece is a spring.

[0017] In a possible implementation, the marble speed detection device is a first high-speed camera, and the elastic piece compression detection device is a second high-speed camera.

[0018] In a possible implementation, the stress detection piece comprises a plurality of strain gauges. Each strain gauge is pasted at a different position of the simulation eggshell.

[0019] In a possible implementation, the simulation eggshell comprises an eggshell main body and an eggshell cover. The eggshell main body is provided with a through hole at a part corresponding to an air chamber. The eggshell cover covers and fills the through hole.

[0020] The preset puncture position is located on the eggshell cover.

[0021] In one possible implementation, the eggshell body is made of a plastic material, and the eggshell cap is made of quicklime and gelatin.

[0022] In one possible implementation, the through hole includes a first hole segment and a second hole segment that are connected to each other. The circumferential sidewall of the first hole segment protrudes beyond the circumferential sidewall of the second hole segment to form a stepped structure within the through hole. The first hole segment is located on the side closer to the interior of the eggshell body.

[0023] The eggshell cover has a first cover portion and a second cover portion connected to each other, and the circumferential edge of the second cover portion protrudes beyond the circumferential edge of the first cover portion;

[0024] When the eggshell cap covers the through hole, the circumferential sidewall of the first cap portion fits against the sidewall of the first hole segment, the side of the first-level step structure facing the second cap portion fits against the side of the second cap facing the first-level step structure, and the circumferential sidewall of the second cap fits against the sidewall of the second hole segment.

[0025] In one possible implementation, the simulated eggshell perforation test apparatus further includes an eggshell cap preparation mold configured to prepare an eggshell cap using the quicklime and the gelatin.

[0026] In one possible implementation, the eggshell cover preparation mold includes an upper mold and a lower mold, wherein the upper mold and the lower mold are detachably connected;

[0027] The lower mold has a pressing groove, and the bottom of the pressing groove is a curved surface;

[0028] The upper mold has a pressing protrusion, and the side of the pressing protrusion facing the lower mold has a groove for preparing the first cap portion. The bottom of the groove is provided with multiple overflow holes. The pressing protrusion is placed in the pressing groove. The pressing protrusion and the pressing groove cooperate to prepare the eggshell cap. Excess preparation liquid poured into the pressing groove flows out from the overflow holes.

[0029] In one possible implementation, the lower mold is provided with a movable plug that extends from one side of the lower mold into the bottom of the molding groove. The movable plug is configured to push the eggshell cover out of the molding groove after the eggshell cover has been formed in the molding groove.

[0030] In one possible implementation, the upper mold is provided with an overflow groove, which is located on opposite sides of the upper mold along with the pressure die protrusion.

[0031] In one possible implementation, the lower mold has a plurality of limiting parts, each of the limiting parts having a limiting groove, and each limiting groove having a buckle.

[0032] The upper mold has multiple limiting posts, the number of which is the same as the number of limiting slots and corresponds one-to-one. Each limiting post is provided with a snap-fit ​​slot.

[0033] In the corresponding limiting post and limiting groove, the limiting post slides into the limiting groove, and the buckle is engaged in the buckle groove, so that the upper mold and the lower mold are fixedly connected.

[0034] In one possible implementation, each of the limiting portions includes a fixing ear, and a first limiting portion, a second limiting portion, and a snap-fit ​​portion disposed on the fixing ear;

[0035] The fixing lug is connected to the side of the lower mold;

[0036] The first limiting part and the second limiting part are disposed opposite to each other, and both the first limiting part and the second limiting part are connected to the side of the lower mold;

[0037] The latching part is disposed between the first limiting part and the second limiting part, and the latching part is opposite to the side of the lower mold;

[0038] The first limiting part, the second limiting part, and the buckling part together form the limiting groove. The buckling part has a buckling protrusion on the side facing the limiting groove, and the buckling protrusion is buckled in the buckling groove.

[0039] In one possible implementation, the snap-fit ​​portion is folded from the side opposite to the fixing ear toward the side opposite to the lower mold.

[0040] In one possible implementation, the side of the first limiting part facing the second limiting part and the side of the second limiting part facing the first limiting part are respectively provided with a sliding groove;

[0041] The limiting post is provided with a sliding strip corresponding to the sliding groove.

[0042] In addition to the technical problems solved by this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by the simulated eggshell perforation test device provided by this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the simulated eggshell perforation test device according to an embodiment of this application;

[0045] Figure 2 This is a schematic diagram of a simulated eggshell;

[0046] Figure 3 for Figure 2 A partial sectional view at point A in the middle;

[0047] Figure 4 for Figure 2 A partial sectional view at point B in the middle;

[0048] Figure 5 A schematic diagram of the structure for preparing a mold for eggshell caps;

[0049] Figure 6 A cross-sectional view of the mold used to prepare the eggshell lid;

[0050] Figure 7 This is a schematic diagram of the lower mold;

[0051] Figure 8 This is a schematic diagram of the upper mold.

[0052] Explanation of reference numerals in the attached figures:

[0053] 100. Eggshell support mechanism;

[0054] 110. Base; 120. Elastic component; 130. Egg tray;

[0055] 200. Simulated eggshell;

[0056] 210. Eggshell body; 220. Eggshell lid;

[0057] 211. Through hole;

[0058] 2111, Second bore section; 2112, First-stage stepped structure;

[0059] 221. First cover part; 222. Second cover part;

[0060] 300. Strain gauge;

[0061] 400. Perforation device;

[0062] 410. Marble launching mechanism; 420. Marble;

[0063] 510. First high-speed camera; 520. Second high-speed camera;

[0064] 600. Eggshell lid preparation mold;

[0065] 610. Lower mold; 620. Upper mold;

[0066] 611. Compression groove; 612. Movable plug; 613. Limiting part;

[0067] 6131. ​​Fixing ear; 6132. First limiting part; 6133. Second limiting part; 6134. Buckling part;

[0068] 61331, Slide groove;

[0069] 621. Compression molding punch; 622. Limiting post; 623. Overflow groove;

[0070] 6211, Groove;

[0071] 6221, Buckle groove; 6222, Slide bar. Detailed Implementation

[0072] In related technologies, the process of culturing vaccines inside chicken embryos involves: using an impact head with a diameter of 2-3 mm to puncture the eggshell of a 9-day-old chicken embryo; after puncturing the eggshell, the needle injects the virus strain into the live chicken embryo, where the virus strain then grows. However, the process of puncturing the eggshell with an impact head can cause cracks in the eggshell, allowing external pathogens to enter the chicken embryo through these cracks, leading to cultivation failure (a failure rate as high as 4%-5%). Furthermore, the allantoic fluid collected later can contaminate the same batch of viruses, causing significant economic losses. Currently, there is no good solution to the problem of cracks easily generated during the eggshell puncture process. According to the inventor's research and analysis, in order to reduce cracks in eggshells during perforation, it is necessary to study the mechanical mechanism of the eggshell during perforation. However, this research is difficult to carry out because: 1. Eggs are small in size and their surface is a curved surface with a small radius of curvature, making it inconvenient to place strain gauges (elements for detecting stress and stress changes at different locations on the eggshell during perforation) on the eggshell; 2. The eggshell wall thickness is only about 0.35 mm, making it particularly fragile and causing great difficulties for research; 3. For a long time, research on thin-shell mechanics has focused on plastic materials (metals, such as steel) and brittle materials (ceramics, etc.), while the main component of eggshells is calcium carbonate (CaCO3), which accounts for about 83%, and the remaining 17% is protein. Therefore, eggshells are neither plastic materials nor brittle materials; 4. Research on thin-shell mechanics mainly focuses on flat plates, curved surfaces, and hemispheres, with very little research on closed thin-walled spherical shells like eggs.

[0073] In view of this, the embodiments of this application design a scaled-up simulated eggshell, arrange stress detection devices at different positions on the simulated eggshell, and conduct a perforation test. The stress detection devices detect the stress and stress changes at different positions on the simulated eggshell to analyze the stress characteristics of the eggshell, thereby reducing the generation of cracks when the eggshell is perforated.

[0074] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0075] like Figure 1As shown, the simulated eggshell perforation testing device provided in this embodiment includes a simulated eggshell 200 and a perforation device 400 capable of perforating the simulated eggshell 200 at preset perforation positions. The simulated eggshell 200 is an eggshell enlarged many times according to the scale of an egg (the egg here can be a chicken egg or other eggs, such as a duck egg). A stress detection element is provided on the simulated eggshell 200, configured to detect the stress at preset stress detection positions on the simulated eggshell 200. The simulated eggshell 200, enlarged many times according to the scale of an egg, solves the problem that the size of an egg is too small to attach the stress detection element to its surface, or that the data obtained from the attached stress detection element is inaccurate. After the simulated eggshell 200 is enlarged proportionally, its size is much larger than that of an egg, making it easier to attach the stress detection element. After attaching the stress detection element to the simulated eggshell 200, the perforation device 400 is used to perforate the simulated eggshell 200. Based on the data detected by the stress detection element, the most suitable perforation conditions are analyzed to reduce the generation of cracks during eggshell perforation. For example, by adjusting the parameters of the perforation device 400 for perforating the simulated eggshell 200 (e.g., perforation speed, perforation size, etc.), and by using a stress detection device to detect the stress and stress changes at a preset stress detection position, and selecting the parameters of the perforation device 400 when the stress at each position is relatively small during the perforation process, the cracks generated during eggshell perforation can be reduced.

[0076] It is worth noting that the "multiple times" in the above-mentioned simulated eggshell 200 magnified multiple times according to the proportion of an egg includes two times. In addition, it can also be a non-integer multiple, such as 2.5 times.

[0077] Optionally, the preset perforation position is located at the part of the simulated eggshell 200 corresponding to the air chamber, and the preset stress detection position is set on the half of the simulated eggshell 200 near the air chamber.

[0078] In some embodiments of this application, the stress detection element includes multiple strain gauges 300, each strain gauge 300 being attached to different positions on the simulated eggshell 200. That is, there are multiple preset stress detection positions, with one strain gauge 300 attached to each preset stress detection position. Optionally, longitude and latitude lines are preset on the simulated egg, with multiple preset stress detection positions located at different longitudes and different latitudes, or multiple preset stress detection positions are set at the same latitude, with these multiple preset stress detection positions located at different longitudes.

[0079] In some embodiments of this application, the perforation device 400 includes a marble 420 and a marble launching mechanism 410. The marble launching mechanism 410 launches the marble 420 towards a preset perforation position on the simulated eggshell 200, causing the marble 420 to penetrate the simulated eggshell 200 at the preset perforation position. Optionally, the marble launching mechanism 410 is a friction wheel launching device, that is, the marble launching mechanism 410 includes two friction wheels that rotate relative to each other to launch the marble 420 to the preset perforation position on the simulated eggshell 200, causing the marble 420 to penetrate the simulated eggshell 200 at the preset perforation position.

[0080] like Figure 1 As shown, the simulated eggshell perforation testing device also includes an eggshell support mechanism 100 and a detection device. The eggshell support mechanism 100 includes a base 110, an egg tray 130, and an elastic element 120 disposed between the base 110 and the egg tray 130. The egg tray 130 is configured to hold a simulated eggshell 200. Optionally, the elastic element 120 is a spring. The detection device includes a marble speed detection device and an elastic element compression detection device. The marble speed detection device is configured to detect the launching speed of the marble 420, and the elastic element 120 compression device is configured to detect the compression amount of the elastic element 120. Optionally, the marble speed detection device is a first high-speed camera 510, and the elastic element compression detection device is a second high-speed camera 520.

[0081] This application embodiment adjusts the launching parameters of the marble 420 (including the launching speed of the marble 420, as well as the size, weight, shape, etc. of the marble 420), records the stress and stress changes at preset stress detection positions under different launching parameters of the marble 420, and analyzes the stress situation at different positions of the simulated eggshell 200 to obtain the most suitable launching parameters of the marble 420. The most suitable launching parameters of the marble 420 are those that minimize damage to the simulated eggshell 200 and whose stress at each position is relatively low during the process of the marble 420 penetrating the simulated eggshell 200. Using these parameters can reduce the generation of cracks when perforating the egg.

[0082] The simulated eggshell perforation test device provided in this application can be used for the following types of research:

[0083] The first method studies the energy absorbed by the simulated eggshell 200. The aforementioned elastic element 120 is used to calculate the energy absorbed by the simulated eggshell 200. Specifically, liquid is injected into the simulated eggshell 200, and the marble launching mechanism 410 launches marbles 420 into the simulated eggshell 200. The launching velocity of the marbles 420 is calculated based on data detected by the marble velocity detection device, and then the kinetic energy A of the marbles 420 is calculated. The compression amount of the elastic element 120 is calculated based on data detected by the elastic element compression detection device, and then the compressive potential energy B of the elastic element 120 is calculated. The difference between the kinetic energy A and the compressive potential energy B of the elastic element 120 is the energy absorbed by the simulated eggshell 200. With the amount of contents remaining constant, the launching parameters of the marbles 420 are changed to study the amount of energy absorbed by the simulated eggshell 200 under different launching parameters, as well as the stress changes at various preset stress detection positions of the simulated eggshell 200.

[0084] The second approach utilizes the fact that chicken embryos of different ages have varying contents, and these contents affect the formation of eggshell cracks. This simulated eggshell perforation test device can be used to study the effect of the amount of contents (the liquid injected into the simulated eggshell 200) on the stress at different locations of the simulated eggshell 200 when the marble launching mechanism 410 launches a marble 420 that penetrates the simulated eggshell 200. In other words, with the launching parameters of the marble 420 remaining constant, the energy absorbed by the simulated eggshell 200 and the stress detected by each strain gauge 300 are recorded when the amount of contents changes. The stress changes at each preset stress detection location of the simulated eggshell 200 are analyzed when the amount of contents changes.

[0085] The third method studies the stress changes at each preset stress detection position of the simulated eggshell 200 and the energy absorbed by the simulated eggshell 200 when the amount of the contents and the launching parameters of the marble 420 change simultaneously.

[0086] Through research in the above three directions, the mechanical mechanism of eggshell perforation can be obtained, thereby reducing the generation of cracks during eggshell perforation. In other words, the above experimental research can determine the stress changes detected by each stress plate are relatively small under a certain amount of contents (e.g., the amount corresponding to the contents of a 6-day-old chicken embryo, or the amount corresponding to the contents of a 9-day-old chicken embryo, etc.), and the launching parameters of the marble 420 can effectively penetrate the simulated eggshell 200. Using these launching parameters for eggshell perforation can reduce the generation of cracks during eggshell perforation.

[0087] like Figure 1 and Figure 2As shown, to facilitate the injection of liquid into the simulated eggshell 200 and reduce the cost of using the simulated eggshell perforation testing device, the simulated eggshell 200 includes an eggshell body 210 and an eggshell cover 220. The eggshell body 210 has a through hole 211 corresponding to the air chamber. The eggshell cover 220 seals and fills the through hole 211, and the preset perforation position is located on the eggshell cover 220. In other words, liquid can be injected into the eggshell body 210 and then sealed by the eggshell cover 220, which facilitates the injection of liquid into the simulated eggshell 200. Furthermore, the preset perforation position is located on the eggshell cover 220, that is, the position where the marble 420 penetrates the simulated eggshell 200 is located on the eggshell cover 220. Since the eggshell cover 220 will inevitably be damaged when the marble 420 penetrates the simulated eggshell 200, while the eggshell body 210 may not be damaged, in the process of repeated experiments, only the eggshell cover 220 needs to be replaced when the eggshell body 210 is not damaged. This reduces the cost of using the simulated eggshell perforation test device and reduces the process of repeatedly attaching strain gauges 300, making the test results more accurate.

[0088] It is worth noting that the liquid injected into the eggshell body 210 can be water or a liquid with a viscosity similar to that of the egg contents.

[0089] In some embodiments of this application, the eggshell body 210 is made of a plastic material, and the eggshell cover 220 is made of quicklime and gelatin. The eggshell cover 220 is made to simulate the composition of an eggshell and is used for penetration by the marble 420. Since the eggshell body 210 is only used to study stress changes, it can be made of a plastic material. The eggshell body 210 made of a plastic material is not easily damaged, which can reduce the cost of using the simulated eggshell perforation test device, and it does not require repeated application of strain gauges 300, making the test results more accurate. Optionally, the eggshell body 210 is printed by a 3D printing device, and its shape is consistent with that of an egg, which is a scaled-up version of a real egg. The thickness of the eggshell body 210 does not exceed 1 mm.

[0090] In this embodiment, the gelatin component in the eggshell cap 220 is used to simulate the proteins inside a real eggshell.

[0091] like Figure 2 and Figure 3 As shown, the through hole 211 includes a first hole segment and a second hole segment 2111 that are connected. The circumferential sidewall of the first hole segment protrudes beyond the circumferential sidewall of the second hole segment 2111 to form a stepped structure 2112 within the through hole 211. The first hole segment is located on one side close to the interior of the eggshell body 210. That is, the radial dimension of the first hole segment is smaller than the radial dimension of the second hole segment 2111.

[0092] like Figure 2 and Figure 4As shown, the eggshell cap 220 has a first cap portion 221 and a second cap portion 222 connected to each other, with the circumferential edge of the second cap portion 222 protruding beyond the circumferential edge of the first cap portion 221. When the eggshell cap 220 seals the through hole 211, the circumferential sidewall of the first cap portion 221 fits against the sidewall of the first hole segment, the side of the first-stage step structure 2112 facing the second cap portion 222 fits against the side of the second cap facing the first-stage step structure 2112, and the circumferential sidewall of the second cap fits against the sidewall of the second hole segment 2111. In other words, the eggshell cap 220 completely fills the through hole 211.

[0093] The simulated eggshell perforation test device based on the embodiments of this application requires the destruction of one eggshell cover 220 in each experiment, so the eggshell cover 220 is a consumable. Therefore, the simulated eggshell perforation test device also includes an eggshell cover preparation mold 600, which is configured to prepare the eggshell cover 220 using quicklime and gelatin.

[0094] In some embodiments of this application, such as Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the eggshell cap preparation mold 600 includes an upper mold 620 and a lower mold 610, which are detachably connected. The lower mold 610 has a molding groove 611, the bottom of which (the side opposite to the molding groove 611) is curved, matching the curved surface of the outer side of the eggshell cap 220. The upper mold 620 has a molding protrusion 621, which is placed inside the molding groove 611, and the protrusion 621 cooperates with the molding groove 611 to prepare the eggshell cap 220. The side of the molding protrusion 621 facing the lower mold 610 has a groove 6211 for preparing the first cap portion 221, and the groove 6211 allows the eggshell cap 220 to form the first cap portion 221. The bottom of the groove 6211 (the side opposite to the opening of the groove 6211) is provided with multiple overflow holes. The overflow holes are used to pour the liquid for preparing the eggshell cover 220 into the molding groove 611. When the molding protrusion 621 is placed in the molding groove 611 to prepare the eggshell cover 220, the excess preparation liquid in the molding groove 611 flows out from the overflow holes.

[0095] like Figure 6 As shown, in order to facilitate the demolding of the formed eggshell cover 220, the lower mold 610 is provided with a movable plug 612. The movable plug 612 is inserted into the bottom of the molding groove 611 from one side of the lower mold 610. The movable plug 612 is configured to push the eggshell cover 220 out of the molding groove 611 after the eggshell cover 220 is formed in the molding groove 611.

[0096] In order to prevent the liquid overflowing from the overflow hole from flowing everywhere, the upper mold 620 is provided with an overflow groove 623, which is located on opposite sides of the upper mold 620 with the pressure punch 621.

[0097] In some embodiments of this application, the lower mold 610 has multiple limiting portions 613, each limiting portion 613 having a limiting groove, and each limiting groove having a snap fastener. The upper mold 620 has multiple limiting posts 622, the number of which is the same as the number of limiting grooves and corresponds one-to-one, and each limiting post 622 has a snap fastener groove 6221. In the corresponding limiting post 622 and limiting groove, the limiting post 622 slides into the limiting groove, and the snap fastener engages in the snap fastener groove 6221, so that the upper mold 620 and the lower mold 610 are fixedly connected. In other words, the upper mold 620 and the lower mold 610 are snapped together by the cooperation of the limiting post 622 and the limiting groove. This connection method facilitates the connection between the upper mold 620 and the lower mold 610. Furthermore, the cooperation between the snap and the snap groove 6221 ensures that after the upper mold 620 is installed on the lower mold 610, there will be no relative movement between the upper mold 620 and the lower mold 610, resulting in better forming of the eggshell cover 220.

[0098] To facilitate the disassembly of the upper mold 620, each limiting part 613 includes a fixing ear 6131, and a first limiting part 6132, a second limiting part 6133, and a snap-fit ​​part 6134 disposed on the fixing ear 6131. ​​The fixing ear 6131 is connected to the side of the lower mold 610. The first limiting part 6132 and the second limiting part 6133 are disposed opposite to each other and are both connected to the side of the lower mold 610. The snap-fit ​​part 6134 is disposed between the first limiting part 6132 and the second limiting part 6133 and is opposite to the side of the lower mold 610. The first limiting part 6132, the second limiting part 6133, and the snap-fit ​​part 6134 form a limiting groove. The side of the snap-fit ​​part 6134 facing the limiting groove is provided with a snap-fit ​​protrusion, which snaps into the snap-fit ​​groove 6221. The latching part 6134 is set separately to facilitate the sliding of the limiting post 622. When the upper mold 620 is disassembled, the latching part 6134 can be pried open so that the latching protrusion can be moved out of the latching groove 6221, thereby facilitating the disassembly of the upper mold 620.

[0099] To facilitate the prying of the latching part 6134, the side of the latching part 6134 away from the fixing ear 6131 is folded towards the side away from the lower mold 610.

[0100] In order to ensure that the upper mold 620 is accurately installed on the lower mold 610, the side of the first limiting part 6132 facing the second limiting part 6133 and the side of the second limiting part 6133 facing the first limiting part 6132 are respectively provided with a sliding groove 61331. The limiting post 622 is provided with a sliding strip 6222 corresponding to the sliding groove 61331. The sliding strip 6222 cooperates with the sliding groove 61331 so that the upper mold 620 can be accurately installed on the lower mold 610.

[0101] In the eggshell cap preparation mold 600 of this application embodiment, when preparing eggshell cap 220, quicklime (CaO) powder and gelatin powder are first mixed evenly, then distilled water is added and stirred. After stirring, quicklime and water react chemically to form calcium hydroxide. The stirred mixture is poured into the pressing groove 611 of the lower mold 610. Then, the upper mold 620 is installed on the lower mold 610. Excess preparation liquid flows out from the overflow hole. The calcium hydroxide in the preparation liquid reacts with carbon dioxide in the air to form calcium carbonate. When the preparation liquid in the pressing groove 611 solidifies, hardens and dries, the upper mold 620 and the lower mold 610 are separated, and the movable plug 612 is pushed to push out the formed eggshell cap 220.

[0102] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0103] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0104] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0105] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A device for simulating eggshell perforation testing, characterized in that, include: A simulated eggshell, wherein the simulated eggshell is an eggshell enlarged many times according to the proportion of an egg, and the simulated eggshell is provided with a stress detection device, wherein the stress detection device is configured to detect the stress at a preset stress detection position on the simulated eggshell; A perforating device capable of perforating the simulated eggshell at a predetermined perforation position.

2. The simulated eggshell perforation test device according to claim 1, characterized in that, The perforation device includes a marble and a marble launching mechanism. The marble launching mechanism launches a marble toward a preset perforation position of the simulated eggshell, and the marble penetrates the simulated eggshell at the preset perforation position. The simulated eggshell perforation test device also includes an eggshell support mechanism and a detection device; The eggshell support mechanism includes a base, an egg tray, and an elastic element disposed between the base and the egg tray, wherein the egg tray is configured to hold the simulated eggshell. The detection device includes a marble speed detection device and an elastic element compression detection device. The marble speed detection device is configured to detect the launching speed of the marble, and the elastic element compression detection device is configured to detect the compression amount of the elastic element.

3. The simulated eggshell perforation test device according to claim 1, characterized in that, The stress detection device includes multiple strain gauges, each of which is attached to a different position on the simulated eggshell.

4. The simulated eggshell perforation test device according to any one of claims 1-3, characterized in that, The simulated eggshell includes an eggshell body and an eggshell lid. The eggshell body has a through hole at the location corresponding to the air cell. The eggshell lid seals and fills the through hole. The preset perforation location is on the eggshell cap.

5. The simulated eggshell perforation test device according to claim 4, characterized in that, The main body of the eggshell is made of a plastic material, and the eggshell cap is made of quicklime and gelatin.

6. The simulated eggshell perforation test device according to claim 5, characterized in that, The through hole includes a first hole segment and a second hole segment that are connected to each other. The circumferential sidewall of the first hole segment protrudes beyond the circumferential sidewall of the second hole segment to form a stepped structure within the through hole. The first hole segment is located on the side close to the interior of the eggshell body. The eggshell cover has a first cover portion and a second cover portion connected to each other, and the circumferential edge of the second cover portion protrudes beyond the circumferential edge of the first cover portion; When the eggshell cap covers the through hole, the circumferential sidewall of the first cap portion fits against the sidewall of the first hole segment, the side of the first-level step structure facing the second cap portion fits against the side of the second cap facing the first-level step structure, and the circumferential sidewall of the second cap fits against the sidewall of the second hole segment.

7. The simulated eggshell perforation test device according to claim 6, characterized in that, The simulated eggshell perforation test device also includes an eggshell cover preparation mold, which is configured to prepare the eggshell cover using quicklime and gelatin.

8. The simulated eggshell perforation test device according to claim 7, characterized in that, The eggshell cover preparation mold includes an upper mold and a lower mold, and the upper mold and the lower mold are detachably connected; The lower mold has a pressing groove, and the bottom of the pressing groove is a curved surface; The upper mold has a pressing protrusion, and the side of the pressing protrusion facing the lower mold has a groove for preparing the first cap portion. The bottom of the groove is provided with multiple overflow holes. The pressing protrusion is placed in the pressing groove. The pressing protrusion and the pressing groove cooperate to prepare the eggshell cap. Excess preparation liquid poured into the pressing groove flows out from the overflow holes.

9. The simulated eggshell perforation test device according to claim 8, characterized in that, The lower mold is provided with a movable plug, which enters the bottom of the molding groove from one side of the lower mold. The movable plug is configured to push the eggshell cover out of the molding groove after the eggshell cover is formed in the molding groove.

10. The simulated eggshell perforation test device according to claim 8, characterized in that, The lower mold has multiple limiting parts, each of which has a limiting groove, and each limiting groove is provided with a buckle; The upper mold has multiple limiting posts, the number of which is the same as the number of limiting slots and they correspond one-to-one. Each limiting post is provided with a snap-fit ​​slot. In the corresponding limiting post and limiting groove, the limiting post slides into the limiting groove, and the buckle is engaged in the buckle groove, so that the upper mold and the lower mold are fixedly connected.

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