Sample protection shell and automatic sample loading device

Abstract

The present invention relates to the technical field of experimental equipment, and in particular, to a sample protection shell and automatic sample loading equipment. The sample protection shell comprises: a body, the body is an arc-shaped sheet structure and is made of a hard material with elasticity, the inner side of the body can be attached to the outer peripheral surface of the sample, and can completely cover the opening of the groove on the outer peripheral surface of the sample, and the arc angle of the body is set to be greater than 180 degrees. In this way, the problem of the heat shrink tube sleeved on the outside of the sample being sunken inward at the groove of the sample is solved.

Description

Technical Field

[0001] The invention relates to the technical field of experimental equipment, and in particular to a sample protection shell and automatic sample loading equipment. Background Art

[0002] In many engineering fields such as mining engineering, tunnel engineering, rock engineering, and energy mining, as the depth of engineering operations continues to increase, rocks are usually affected by high ground stresses. These natural rocks are also prone to fracture and damage under dynamic loads, such as blasting and earthquakes. Therefore, it is very important to quantitatively study the dynamic fracture characteristics of deep rocks under dynamic loads and ground stresses. The fracture toughness of rocks is an important parameter for determining whether rock cracks have expanded. In actual engineering, the external loads on the rock mass are very complex. In most cases, when the rock mass is subjected to compressive shear loads, the rock will undergo type II fracture. Therefore, accurately measuring the type II fracture toughness of rocks is of great significance to actual engineering.

[0003] In order to measure the type II fracture parameters of rocks under different working conditions, a variety of test methods have been proposed in previous studies. Among them, the punch shear method is recommended by the International Society for Rock Mechanics as a method for measuring the type II fracture toughness of rocks. However, the sample preparation of this method is complicated and requires special fixtures to fix the samples, resulting in excessive experimental costs. Therefore, in order to simplify the preparation of samples and fixtures and to measure the dynamic type II fracture parameters of rocks, the short-core compression method is introduced. This method is to cut semicircular grooves with a width of 1mm and a depth of the cross-sectional radius of the cylindrical sample on both sides of the axis at a certain distance from the end of the cylindrical sample. A rectangular rock bridge will be formed between the tips of the two grooves. When the cylindrical sample is loaded at both ends, the sample will produce shear failure along the rectangular rock bridge, resulting in type II fracture. The specimen used in the short-core compression method is a cylindrical SCC specimen, which is provided with two semicircular grooves at a specified distance from the end. The existing specimens and experimental equipment have the following disadvantages: When conducting experiments under confining pressure conditions, a heat shrink tube needs to be put on the specimen to isolate the hydraulic oil to prevent the hydraulic oil from penetrating into the specimen and affecting the experimental results. In order for the hydraulic oil to provide a uniform predetermined confining pressure for the specimen, after the heat shrink tube is put on the specimen, the heat shrink tube needs to be heated and shrunk so that it can fit tightly on the specimen. However, since the SCC specimen has two semicircular grooves, when the heat shrink tube is heated, the heat shrink tube will be heated at the groove and sink into the groove, thereby affecting the experimental results. In addition, during the process of loading the specimens in the experiment, on the one hand, the heating and shrinking process of the heat shrink tube is relatively time-consuming, and when the heat shrink tube is heated manually with a hot air gun, the heat shrink tube will be heated unevenly, resulting in the heat shrink tube and the specimen not being able to fit tightly; on the other hand, due to the large mass of the confining pressure cylinder itself, its opening and closing and the tightening and disassembly of the bolts usually require two people to operate at the same time, and the operating steps are relatively complicated, which makes the sample loading process time-consuming and labor-intensive, resulting in a significant reduction in experimental efficiency. Summary of the invention

[0004] In order to solve the problem that a heat shrink tube sleeved on the outside of a sample is sunken inward at a groove of the sample, the present invention provides a sample protection shell and automatic sample loading equipment.

[0005] The first aspect of the present application provides a sample protection case, comprising:

[0006] The main body is an arc-shaped sheet structure and is made of elastic hard material. The inner side of the main body can fit on the outer peripheral surface of the sample and can completely cover the opening of the groove on the outer peripheral surface of the sample. The arc angle of the main body is set to be greater than 180 degrees.

[0007] In some embodiments, the body is made of carbon fiber.

[0008] In some embodiments, the width of the inner side surface is set to 2-6 mm, the thickness of the body is set to 0.5-1.5 mm, and the arc angle of the body is set to be greater than 180 degrees and less than or equal to 270 degrees.

[0009] The second aspect of the present application also provides an automatic sample loading device, comprising:

[0010] A support frame, a sample grabbing device and a protective shell installation device, the protective shell installation device is used to install the sample protective shell in the above technical solution on the sample, the sample grabbing device and the protective shell installation device are both arranged on the support frame, and the sample grabbing device can clamp and fix the sample.

[0011] In some embodiments, a connection structure is also fixedly disposed on the outer side of the sample protection shell;

[0012] The protective shell installation device includes a first horizontal driving assembly and a protective shell grabbing assembly. The protective shell grabbing assembly can be detachably connected to the connecting structure. The first horizontal driving assembly can drive the protective shell grabbing assembly to move in a horizontal direction to approach or move away from the sample.

[0013] In some embodiments, the connection structure is disposed at the center of the sample protection shell;

[0014] The protective shell grabbing assembly includes a fixing portion and mounting portions respectively arranged at both ends of the fixing portion, the mounting portion is provided with a connecting piece that can match the connecting structure, and the mounting portion can approach or move away from the center position of the fixing portion.

[0015] In some embodiments, the connection structure is made of a material that can be attracted by magnetic force, and the connection member is a magnet.

[0016] In some embodiments, the sample grabbing device includes a sample grabbing assembly, which includes a grabbing claw and a roller arranged on the inner side of the grabbing claw. The grabbing claw can grab the sample and make the roller fit the outer circumferential surface of the sample. The roller can rotate to drive the sample to rotate around the central axis so that the groove is facing the installation direction of the protective shell mounting device; the sample grabbing device also includes a second horizontal drive assembly, which can drive the sample grabbing assembly away from or close to the protective shell mounting device.

[0017] In some embodiments, the support frame includes two support rods arranged opposite to each other, the two support rods are respectively provided with a first slideway and a second slideway extending in a vertical direction, the protective shell installation device also includes a first slider, a side of the first horizontal driving assembly away from the protective shell grabbing assembly is connected to the first slider, and the first slider is sleeved on the first slideway and can rotate around the first slideway;

[0018] The sample grabbing device comprises a second sliding block. One end of the second horizontal driving assembly away from the sample grabbing assembly is connected to the second sliding block. The second sliding block is sleeved on the second slideway and can rotate around the second slideway.

[0019] In some embodiments, the automatic sample loading equipment also includes an image recognizer and a control component. The image recognizer is arranged on the protective shell installation device and can determine the position information of the cutting groove. The control component can control the protective shell installation device to install the sample protective shell on the sample according to the position information.

[0020] In some embodiments, the automatic sample loading device further includes a sample installation device and an experimental device. The sample grabbing device can transfer the sample installed with the sample protection shell to the sample installation device, and the sample installation device can install the sample on the experimental device.

[0021] In some embodiments, the experimental device includes a coaxially arranged incident rod, a transmission rod, and a sample mounting position arranged between the incident rod and the transmission rod. The sample mounting device includes a vertical drive assembly and a clamping sleeve. The clamping sleeve can clamp the sample. The sample mounting position is arranged below the clamping sleeve. The vertical drive assembly can drive the clamping sleeve to drive the sample to reach the sample mounting position.

[0022] In some embodiments, the sample mounting device also includes a positioning assembly, which includes positioning sleeves arranged at both ends of the clamping sleeve, and the positioning sleeves are coaxially arranged with the clamping sleeve. The two positioning sleeves can be opened and clamped on the outer peripheral surfaces of the incident rod and the transmission rod respectively under the drive of the vertical driving assembly, so that the sample is coaxial with the incident rod and the transmission rod.

[0023] In some embodiments, a heating component is also provided on the inner circumference of the clamping sleeve and the positioning sleeve.

[0024] In some embodiments, the support frame further comprises a horizontally arranged support beam, a horizontal slide is arranged on the support beam, a third slide is arranged at one end of the vertical drive assembly away from the clamping sleeve, and the third slide can slide along the horizontal slide.

[0025] In some embodiments, the experimental device also includes a confining pressure cylinder capable of accommodating the sample, the confining pressure cylinder includes a first cylinder body and a second cylinder body, the first cylinder body and the second cylinder body can be closed in the axial direction to set the sample in the confining pressure cylinder, the first cylinder body is sleeved on the incident rod and can slide in the axial direction of the incident rod, the second cylinder body is sleeved on the transmission rod and can slide in the axial direction of the transmission rod; the automatic sample loading equipment also includes a locking device, the locking device can install the fixing bolt on the confining pressure cylinder and fix the first cylinder body to the second cylinder body.

[0026] In some embodiments, the second cylinder body is provided with a pull ring, and the locking device includes a third horizontal drive assembly and a screw fastening head. The screw fastening head can pass through and hook the pull ring, and pull the second cylinder body closer to or away from the first cylinder body under the drive of the third horizontal drive assembly.

[0027] In order to solve the problem that the heat shrink tube sleeved on the outside of the sample is sunken inward at the groove of the sample, the present invention has the following advantages:

[0028] By setting the main body as a thinner arc-shaped sheet structure, it can be installed in the opening of the groove without affecting the fitting of the heat shrink tube installed on the outside of the sample during the subsequent experiment. Since the main body is made of hard material, it can provide better support, not only can it withstand the deformation force of the heat shrink tube during the shrinking process, but also can withstand the pressure given by the confining pressure cylinder during the experiment and remain unchanged and unbroken, thereby avoiding the problem of the heat shrink tube partially entering the groove and affecting the experimental results. In addition, the arc angle of the main body is set to be greater than 180 degrees. After installation, it can be naturally fixed on the outer surface of the sample by utilizing its own shape characteristics without the need for other parts or materials such as glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic structural diagram of a sample protection shell according to an embodiment of the present application is shown;

[0030] Figure 2 A front view of a sample protection shell according to an embodiment of the present application is shown;

[0031] Figure 3 A schematic diagram showing a structure in which a sample protection cover is installed on a sample according to an embodiment of the present application;

[0032] Figure 4 A schematic structural diagram of an automatic sample loading device according to an embodiment of the present application is shown;

[0033] Figure 5 Shows Figure 4 A partial enlarged view of the middle A part;

[0034] Figure 6 A schematic structural diagram of a protective shell installation device according to an embodiment of the present application is shown;

[0035] Figure 7 Shows Figure 6 A partial enlarged view of part B in the middle;

[0036] Figure 8 A schematic structural diagram of a sample grabbing device according to an embodiment of the present application is shown;

[0037] Fig. 9 Shows Figure 8A partial enlarged view of the middle C part;

[0038] Fig.10 A schematic structural diagram of a sample installation device according to an embodiment of the present application is shown;

[0039] Fig.11 It shows a schematic diagram of the structure after the confining pressure cylinder in the present application is installed;

[0040] Fig.12 A schematic structural diagram of a locking device according to an embodiment of the present application is shown;

[0041] Fig.13 A schematic structural diagram of a support rod according to an embodiment of the present application is shown.

[0042] Reference numerals:

[0043] 10-sample protection shell; 11-body; 12-connection structure; 20-support frame; 21-support rod; 211-base; 212-first slide; 213-second slide; 22-support beam; 221-horizontal slide; 30-protection shell installation device; 31-protection shell grabbing assembly; 311-fixing part; 312-installation part; 313-connecting piece; 32-first horizontal driving assembly; 321-folding rod; 322-hinge shaft; 33-first slider; 40-sample grabbing device; 41-second horizontal driving assembly; 42-sample Grabbing assembly; 421-grabbing claw; 422-roller; 43-second slider; 50-sample mounting device; 51-clamping sleeve; 52-vertical drive assembly; 53-positioning sleeve; 54-third slider; 55-movable joint; 60-locking device; 61-screw fastening head; 62-third horizontal drive assembly; 63-hinge structure; 70-image identifier; 100-sample; 101-cutting groove; 200-incident rod; 300-transmission rod; 400-confining pressure cylinder; 401-first cylinder body; 402-second cylinder body, 403-screw. DETAILED DESCRIPTION

[0044] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0045] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0046] This embodiment discloses a sample protection shell 10, such as Figure 1-3 As shown, it may include: a main body 11, which is an arc-shaped sheet structure and is made of elastic hard material. The inner side of the main body 11 can fit on the outer peripheral surface of the sample 100 and can completely cover the opening of the groove 101 on the outer peripheral surface of the sample 100. The arc angle of the main body 11 is set to be greater than 180 degrees.

[0047] It should be noted that the short core compression method is used to determine the type II fracture parameters of rocks under dynamic loads, and it is based on a split Hopkinson pressure bar experimental device. During the experiment, the SCC (Short Core in Compression) specimen 100 needs to be clamped between the incident rod 200 and the transmission rod 300 in the SHPB (Split Hopkinson Pressure Bar), and then the heat shrink tube is put on the specimen 100. The heat shrink tube needs to fully cover the outer surface of the specimen 100 and the connection with the incident rod 200 and the transmission rod 300, so it will also partially cover the part of the incident rod 200 and the transmission rod 300 close to the specimen 100, so as to fully isolate the hydraulic oil that applies confining pressure to the specimen 100. After the specimen 100 is filled, the heat shrink tube is manually heated, and the specimen 100 is sealed. After that, the experimenter closed the confining pressure cylinder 400 and locked it with bolts, then applied confining pressure to the sample 100 to a predetermined value, and pressed the cylinder switch to excite the bullet in the SHPB barrel, which hit the free end of the incident rod 200, generating a longitudinal compression wave and propagating along the incident rod 200. When reaching the interface between the incident rod 200 and the sample 100, part of the wave will pass through the sample 100 and propagate along the transmission rod 300, and the other part of the wave will be reflected back along the incident rod 200. The strains generated by the three waves, the incident wave, the reflected wave and the transmitted wave, will be measured by the strain gauges attached to the incident rod 200 and the transmission rod 300, and the data image of the waves generated will be displayed on the oscilloscope. Subsequently, the corresponding type II fracture parameters will be calculated by processing the relevant experimental data.

[0048] like Figure 3As shown, the cylindrical core sample 100 is cut with a semicircular groove 101 with a width of 1 mm and a depth equal to the cross-sectional radius of the cylindrical sample 100 on both sides of the axis at a certain distance from the end, and a rectangular rock bridge is formed between the tips of the two grooves 101. By setting the body 11 as a thinner arc-shaped sheet structure, it can be fitted and installed at the opening of the groove 101, and will not affect the fitting of the heat shrink tube sleeved on the outside of the sample 100 during the subsequent experiment. Since the body 11 is made of hard material, it can provide better support force, not only can it withstand the deformation force of the heat shrink tube during the shrinking process, but also can withstand the pressure given by the confining pressure cylinder 400 during the experiment and remain undeformed and unbroken. On the one hand, a continuous surface is provided for the groove 101 of the sample 100 to prevent the heat shrink tube from being dented by heat and hindering the shear fracture of the sample 100. On the other hand, it also prevents the heat shrink tube from being damaged by heat during the experiment. Hydraulic oil is immersed in the sample 100 to improve the accuracy of the experimental data. In addition, the arc angle of the main body 11 is set to be greater than 180 degrees. During installation, its elasticity can be used to slightly expand its opening to complete the installation. After installation, its own shape characteristics can be used, that is, its opening is smaller than the diameter of the sample 100, so that it can be naturally fixed on the outer peripheral surface of the sample 100 without the aid of other components or materials such as glue.

[0049] In order to make the body 11 thinner and lighter and have better compressive strength, the body 11 is made of carbon fiber.

[0050] As a specific implementation method, Figure 2 As shown, the width of the inner side is set to 2-6 mm, preferably, to 4 mm, and the thickness of the body 11 is set to 0.5-1.5 mm, preferably, to 1 mm. Figure 2 Where α represents an arc angle, and the arc angle of the body 11 is set to be greater than 180 degrees and less than or equal to 270 degrees, preferably greater than 220 degrees and less than 260 degrees, and more preferably, set to 240 degrees.

[0051] The second aspect of the present application also provides an automatic sample loading device, such as Figures 4 to 13 As shown, the automatic sample loading equipment includes: a support frame 20, a sample grabbing device 40 and a protective shell installation device 30. The protective shell installation device 30 is used to install the sample protective shell 10 in the above technical solution on the sample 100. The sample grabbing device 40 and the protective shell installation device 30 are both arranged on the support frame 20. The sample grabbing device 40 can clamp and fix the sample 100.

[0052] In this embodiment, if Figure 4 , Figure 8 , Fig. 9As shown, the sample gripping device 40 is used to clamp and fix the sample 100. The sample gripping device 40 can be a simple fixing device, for example, it can be provided with a fixing portion 311 or device matching the sample 100, or it can be a mechanical device such as an automatic or manually controlled robotic arm that can automatically grasp and adjust the position of the sample 100. In order to enable the sample protection shell 10 to be smoothly installed on the sample 100, the part of the sample gripping device 40 that contacts the sample 100 needs to avoid the groove 101. For example, the two ends of the sample 100 can be fixed, so that the outer peripheral surface of the sample 100 can be more fully exposed, thereby effectively avoiding obstacles to the installation of the sample protection shell 10. Alternatively, the sample gripping device 40 can be connected or fixed to the end of the sample 100 away from the groove 101. On the one hand, the groove 101 on the sample 100 can be avoided to facilitate the installation of the sample protection shell 10. On the other hand, the end of the sample 100 away from the groove 101 can have a large and complete outer surface, which can have a large contact area when fixing the sample 100 to ensure contact stability. The specific gripping method can be selected according to actual conditions.

[0053] like Figure 5-Figure 7 As shown, the protective shell installation device 30 can be similar to the sample grabbing device 40, which can be a simple fixing device or can be implemented by an automated mechanical arm, etc., and the mechanical arm can be controlled by an automated program to automatically grab the sample protective shell 10 and install it on the corresponding position on the sample 100. More specifically, one of the protective shell installation device 30 and the sample grabbing device 40 can be set as a relatively simple fixing device, and the other can be set as an automated mechanical arm to achieve the function of automatic installation; or, both the protective shell installation device 30 and the sample grabbing device 40 can adopt movable and adjustable devices such as mechanical arms, so that the protective shell installation device 30 and the sample grabbing device 40 work together under the control of the control program to complete the installation action.

[0054] Since a separate Hopkinson pressure bar test device is usually provided on the ground space, the protective shell installation device 30 and the sample grabbing device 40 can be installed on the support frame 20, which not only reduces the occupation of the ground space but also integrates multiple devices into one.

[0055] In order to facilitate the grabbing of the sample protection shell 10 by the protection shell installation device 30, as shown in FIG. Figures 1 to 3 As shown, a connection structure 12 is fixedly disposed on the outer surface of the sample protection shell 10; Figure 4-Figure 7As shown, the protective shell installation device 30 includes a first horizontal driving assembly 32 and a protective shell grabbing assembly 31 . The protective shell grabbing assembly 31 can be detachably connected to the connecting structure 12 . The first horizontal driving assembly 32 can drive the protective shell grabbing assembly 31 to move horizontally to approach or move away from the sample 100 .

[0056] The connection method between the connection structure 12 and the protective shell grasping component 31 can adopt mechanical connection methods such as threaded connection, snap connection, etc., or magnetic connection can be adopted as the connection method. Alternatively, the connection structure 12 can also be a structure that can be grasped, for example, it can be set as a smaller columnar structure, and the protective shell grasping component 31 adopts a mechanical claw as an implementation method. The mechanical claw can directly grasp the columnar structure through a clamping action, and then grasp the sample protective shell 10. In addition, for the sample 100 that has been fixed and adjusted to the appropriate position, the protective shell grabbing component 31 that has grabbed the sample protective shell 10 is driven by the first horizontal driving component 32 to approach the sample 100, and further, under the push of the first horizontal driving component 32, the opening of the sample protective shell 10 is brought into contact with the sample 100, and then the opening of the sample protective shell 10 is further pushed to slide along the outer peripheral surface of the sample 100, so that the sample protective shell 10 gradually expands, and finally the inner peripheral surface of the sample protective shell 10 is attached to the groove 101 on the outer peripheral surface of the sample 100, and the opened sample protective shell 10 can be restored to its original shape under the action of elasticity to fix itself on the outer peripheral surface of the sample 100.

[0057] The first horizontal driving assembly 32 can be implemented in a variety of ways, for example, a horizontally arranged slideway and a slider matching the slideway can be used, and the protective shell grabbing assembly 31 can be moved in the horizontal direction by connecting the protective shell grabbing assembly 31 with the slider. Figure 4 as well as Figure 6 In the embodiment shown, the first horizontal driving assembly 32 includes a folding arm composed of a plurality of folding rods 321 hinged in sequence. These folding rods 321 may have the same length and may be hinged end to end in sequence through hinge shafts 322, thereby achieving the purpose of driving the protective shell grasping assembly 31 to move. Furthermore, a driving motor may be provided at the hinge, and the automatic unfolding or folding of the folding arm may be achieved by adjusting the rotation of the driving motor.

[0058] As a specific implementation method, Figure 1-3 As shown, the connection structure 12 is arranged at the center of the sample protection shell 10; Figure 5 As shown, the protective shell grabbing assembly includes a fixing portion 311 and mounting portions 312 respectively arranged at both ends of the fixing portion 311 , the mounting portion 312 is provided with a connecting piece 313 that can match the connecting structure 12 , and the mounting portion 312 can approach or move away from the center position of the fixing portion 311 .

[0059] Specifically, the length of the mounting portion 312 can be set to be greater than the radius length of the sample 100. At the same time, the end of the mounting portion 312 away from the fixing portion 311 is used to connect with the connecting structure 12 of the sample protection shell 10. Furthermore, the mounting portion 312 may include two mounting portions 312, and the moving directions of the two mounting portions 312 are relatively set and staggered in the horizontal direction. The staggered distance is set to the distance between the two grooves 101 on the sample 100, so that the two mounting portions 312 can install two sample protection shells 10 at the same time, thereby improving the installation efficiency.

[0060] In some embodiments, the connection structure 12 is made of a material that can be attracted by magnetic force, and the connection member 313 is a magnet.

[0061] The connection structure 12 can be configured as a hemispherical iron material, and the connection piece 313 has a recessed portion that matches the connection structure 12, so as to increase the contact area between the connection structure 12 and the connection piece 313 in a smaller volume to increase the magnetic attraction. Furthermore, in order to prevent the sample protection shell 10 from being detached or deviating from the installation position when the connection structure 12 is detached from the connection piece 313, the connection piece 313 can be configured as an electromagnet, and the attraction to the connection structure 12 can be canceled by disconnecting the power supply to the electromagnet.

[0062] For the sample 100, in addition to being able to be grasped, its angle position needs to be adjusted so that the groove 101 provided thereon is in the correct position, so that the installed sample protection shell 10 can completely cover the groove 101. Specifically, Figure 4 , Figure 8 , Fig. 9 As shown, the sample grabbing device 40 includes a sample grabbing assembly 42, which includes a grabbing claw 421 and a roller 422 arranged on the inner side of the grabbing claw 421. The grabbing claw 421 can grab the sample 100 and make the roller 422 fit the outer circumferential surface of the sample 100. The roller 422 can rotate to drive the sample 100 to rotate around the central axis so that the groove 101 is facing the installation direction of the protective shell installation device 30; the sample grabbing device 40 also includes a second horizontal driving assembly 41, which can drive the sample grabbing assembly 42 away from or close to the protective shell installation device 30.

[0063] In this embodiment, the grasping claw 421 may be configured to include a plurality of grasping parts, and the plurality of grasping parts may be retracted to grasp the sample 100. At the same time, the position grasped by the plurality of grasping parts may be the cylindrical outer peripheral surface of the sample 100. In order to adjust the relative angle of the sample 100, a roller 422 may be provided at the position where the grasping claw 421 contacts the outer peripheral surface of the sample 100. The roller 422 may be provided in plurality, and the sample 100 may be rotated around its central axis by rotating the roller 422, thereby achieving the purpose of adjusting the angle of the sample 100. Among them, a driving device may be provided in at least one of the plurality of rollers 422, thereby driving the roller 422 to rotate.

[0064] In addition, in order to increase the friction during grasping, the roller 422 can be made of a material with a certain flexibility and a large surface roughness, such as silicone, rubber, etc., so that when grasping the sample 100, the roller 422 can be deformed to a certain extent under the force applied by the grasping claw 421, thereby increasing the contact area with the sample 100 and increasing the friction, thereby ensuring the stability of grasping.

[0065] The sample grabbing device 40 may further include a second horizontal driving assembly 41 . The second horizontal driving assembly 41 may adopt the same implementation as the first horizontal driving assembly 32 , which will not be described in detail herein.

[0066] In order to increase the flexibility of the equipment and enable the sample protection shell 10 and the sample 100 to be installed to be adjusted to an appropriate height position, such as Figure 4 as well as Fig.13 As shown, the support frame 20 includes two oppositely arranged support rods 21, and the two support rods 21 are respectively provided with a first slide 212 and a second slide 213 extending in the vertical direction. The protective shell mounting device 30 also includes a first slider 33, and the first horizontal driving component 32 is connected to the first slider 33 at a side away from the protective shell grabbing component 31, and the first slider 33 is sleeved on the first slide 212 and can rotate around the first slide 212; the sample grabbing device 40 includes a second slider 43, and the second horizontal driving component 41 is connected to the second slider 43 at one end away from the sample grabbing component 42, and the second slider 43 is sleeved on the second slide 213 and can rotate around the second slide 213.

[0067] By setting the first slide 212 and the first slider 33, the protective shell installation device 30 can be moved in the vertical direction, so as to adjust the position of the sample protective shell 10 to improve the installation accuracy. As an embodiment, the protective shell installation device 30 can be hinged on the first slider 33, so that when adjusting the position of the sample protective shell 10, in addition to being able to adjust in the driving direction of the first horizontal driving component 32, it can also achieve its position adjustment in the horizontal plane. Alternatively, the cross section of the first slide 212 can be set to a circular shape, and the first slider 33 is sleeved on the outer peripheral surface of the first slide 212, so that the first slider 33 can not only slide in the extension direction of the first slide 212 (vertical movement), but also rotate around the first slide 212, and can also adjust the position of the sample protective shell 10 in the horizontal plane. Further, combined with the vertical adjustment function of the first slide 212 and the first slider 33, the protective shell installation device 30 can position the sample protective shell 10 at any position within a certain spatial range when installing it, thereby ensuring the accuracy of installation.

[0068] The sample grabbing device 40 may also be installed in a similar manner to adjust the position of the sample 100 within a certain spatial range.

[0069] In order to realize the automatic installation of the sample protection shell 10, Figure 5 as well as Figure 7 As shown,

[0070] The automatic sample loading equipment also includes an image recognizer and a control component. The image recognizer is arranged on the protective shell installation device 30 and can determine the position information of the cutting groove 101. The control component can control the protective shell installation device 30 to install the sample protective shell 10 on the sample 100 according to the position information.

[0071] The image recognizer can be optionally installed on the protective shell grabbing component 31 and the sample grabbing component 42, so that the image recognizer can be shielded by other components as much as possible, and the position to be installed or the position of the sample 100 can be more intuitively identified, avoiding the process of converting the information recognized by the image recognizer, and simplifying the control program. The control component can be an electronic device that can store and process information and run programs, and can have a variety of appropriate implementations, such as a single-chip microcomputer, a PC, an industrial computer, and a server.

[0072] Taking a preferred embodiment of the present application as an example, the process of installing the sample protection cover 10 onto the sample 100 by the automatic sample loading device is described:

[0073] The connecting structure 12 provided on the sample protective shell 10 is recognized by an image recognizer provided on the protective shell grabbing device, and the protective shell grabbing device is controlled to grab the sample protective shell 10. At the same time, the sample 100 to be installed is recognized by an image recognizer provided on the sample grabbing device 40, and the sample 100 grabbing device 40 is controlled to grab it, the position of the grabbed sample 100 is recognized, and the roller 422 is controlled to adjust the sample 100 to a position suitable for installing the sample protective shell 10.

[0074] Through the recognition information of the image recognizer, the protective shell grabbing device and the sample grabbing device 40 are controlled to cooperate with each other to install the sample protective shell 10 to a predetermined installation position.

[0075] In order to further improve the experimental efficiency, the automatic sample loading device can also install the sample 100 already installed with the sample protection shell 10 on the experimental device, specifically, as Figure 4 As shown,

[0076] The automatic sample loading device further comprises a sample mounting device 50 and an experimental device. The sample grabbing device 40 can transfer the sample 100 mounted with the sample protection shell 10 to the sample mounting device 50 , and the sample mounting device 50 can mount the sample 100 on the experimental device.

[0077] The sample mounting device 50 may be a device such as a robot arm, which can grab the sample 100 and mount it on the experimental device.

[0078] As a specific implementation method, Fig.10 as well as Fig.11 As shown, the experimental device includes a coaxially arranged incident rod 200, a transmission rod 300 and a sample mounting position arranged between the incident rod 200 and the transmission rod 300, the sample mounting device 50 includes a vertical driving component 52 and a clamping sleeve 51, the clamping sleeve 51 can clamp the sample 100, the sample mounting position is arranged below the clamping sleeve 51, and the vertical driving component 52 can drive the clamping sleeve 51 to drive the sample 100 to reach the sample mounting position.

[0079] The clamping sleeve 51 can be composed of two semicircular cylinders. The inner circumference of the clamping sleeve 51 can fit the outer circumference of the sample 100. Since the sample protection shell 10 has been installed on the sample 100 at this time, the length of the clamping sleeve 51 can be set equal to or slightly greater than the length of the sample 100.

[0080] The sample installation position is a spatial position defined by the positions of the incident rod 200 and the transmission rod 300 during the experiment. There is no supporting structure here. The experimental device includes an axial pressure device that can push the transmission rod 300 to move toward the sample installation position and clamp the sample 100. When the clamping sleeve 51 places the sample 100 at the sample installation position, the axial pressure device can push the transmission rod 300 to squeeze the sample 100, so that the sample 100 is fixed on the sample installation position. After the fixing is completed, the clamping sleeve 51 can be opened.

[0081] Since the experimental device is usually large, it can be placed on the ground for stability. In order to prevent the automatic sample loading device from interfering with the experimental process, a vertical drive assembly 52 can be provided to adjust the position of the clamping sleeve 51. When the experiment is in progress, the vertical drive assembly 52 can adjust the clamping sleeve 51 to a higher position, and when installing the sample 100, the clamping sleeve 51 can be lowered to an appropriate position to complete the installation. The vertical drive assembly 52 can be a telescopic rod, a slideway, or other structures.

[0082] In order to make the sample 100 coaxial with the incident rod 200 and the transmission rod 300 after installation, Fig.10 As shown,

[0083] The sample mounting device 50 also includes a positioning assembly, which includes positioning sleeves 53 arranged at both ends of the clamping sleeve 51. The positioning sleeves 53 are coaxially arranged with the clamping sleeve 51. The two positioning sleeves 53 can be opened and clamped on the outer peripheral surfaces of the incident rod 200 and the transmission rod 300 respectively under the drive of the vertical driving assembly 52, so that the sample 100 is coaxial with the incident rod 200 and the transmission rod 300.

[0084] It should be noted that the diameter of the sample 100 is usually the same as that of the incident rod 200 and the transmission rod 300. Since the positioning sleeve 53 and the clamping sleeve 51 are coaxially arranged, when the two positioning sleeves 53 are respectively sleeved on the outer circumference of the incident rod 200 and the transmission rod 300 and fit therewith, the sample 100 clamped by the positioning sleeve 53 can naturally be coaxial with the incident rod 200 and the transmission rod 300. In order to facilitate adjustment, the clamping sleeve 51 and the positioning sleeve 53 can be integrated, and the position where it is connected to the vertical drive assembly 52 can be provided with a movable joint 55 to avoid restrictions on the positioning assembly and the clamping sleeve 51 and prevent accurate installation. After the sample 100 is clamped in place, the unshrinkable heat shrink tube previously sleeved on the transmission rod 300 or the incident rod 200 can be sleeved to a predetermined position.

[0085] In the prior art, the shrinkage of the heat shrink tube is usually completed by heating the heat shrink tube manually using a hot air gun. This process is relatively cumbersome and inefficient. In order to improve the efficiency of the heating and shrinking process of the heat shrink tube, a heating component is further provided on the inner circumference of the clamping sleeve 51 and the positioning sleeve 53.

[0086] In addition, the heating component can be a structure such as an electric heating wire, which can emit a temperature sufficient to shrink the heat shrink tube. Since the positioning sleeve 53 and the clamping sleeve 51 can be fully clamped on the sample 100 and the incident rod 200 and the transmission rod 300 covered by the heat shrink tube, and circumferentially cover the sample 100 and the incident rod 200 and the transmission rod 300, the heat shrink tube can be heated over a large area at the same time to shrink it quickly. In order to ensure the flatness of the heat shrink tube after shrinkage, the inner diameter of the heat shrink tube before heating only needs to be slightly larger than the diameter of the sample 100 and can be put on.

[0087] At the same time, in order to adjust the position of the sample mounting device 50 in the horizontal direction, as shown in FIG. Figure 4 As shown, the support frame 20 also includes a horizontally arranged support beam 22 , on which a horizontal slide 221 is arranged. A third slider 54 is arranged at one end of the vertical drive assembly 52 away from the clamping sleeve 51 , and the third slider 54 can slide along the horizontal slide 221 .

[0088] As a specific implementation method, Fig.13 As shown, the bottom of the support rod 21 may be provided with a base 211, which can increase the contact area between the support rod 21 and the ground, thereby improving the stability of the support rod 21. The top of the support rod 21 may be provided with a through hole for the support beam 22 to pass through, and the two ends of the support beam 22 respectively pass through the through holes of the two oppositely arranged support rods 21 to obtain stable support, and then use bolts to fix them to prevent the support beam 22 from moving. The third slider 54 can slide along the horizontal slide 221, so that the sample installation device 50 can move along the horizontal slide 221.

[0089] As a specific implementation method, Fig.11 , Fig.12 As shown, the experimental device also includes a confining pressure cylinder 400 capable of accommodating the sample 100, the confining pressure cylinder 400 includes a first cylinder body 401 and a second cylinder body 402, the first cylinder body 401 and the second cylinder body 402 can be closed in the axial direction to set the sample 100 in the confining pressure cylinder 400, the first cylinder body 401 is sleeved on the incident rod 200 and can slide in the axial direction of the incident rod 200, the second cylinder body 402 is sleeved on the transmission rod 300 and can slide in the axial direction of the transmission rod 300; the automatic sample loading equipment also includes a locking device 60, the locking device 60 can install the fixing bolts on the confining pressure cylinder 400 and fix the first cylinder body 401 on the second cylinder body 402.

[0090] Since the confining pressure cylinder 400 has a large weight, the installation and fixation of the confining pressure cylinder 400 in the prior art requires a lot of manpower, usually requiring at least two people to cooperate to complete, and the installation process is relatively complicated. In the present application, a locking device 60 is provided. Specifically, as shown in the figure, the locking device 60 may include two and are respectively slidably arranged on the first slide 212 and the second slide 213 through a slider. The locking device 60 may include a third horizontal drive assembly 62, and the third horizontal drive assembly 62 may adopt the same implementation as the first horizontal drive assembly 32. The figure shows a telescopic rod. The locking device 60 may also include a screw fastening head 61 arranged at the end of the telescopic rod. The screw fastening head 61 can match the screw 403 used to fix the first cylinder body 401 and the second cylinder body 402, and can drive the screw 403 to rotate to complete the installation. In order to enable the screw fastening head 61 to fully contact with the screw 403, a hinge structure 63 is provided between the screw fastening head 61 and the telescopic rod, so that the angle between the screw fastening head 61 and the telescopic rod can be adjusted.

[0091] As an optional embodiment, the second cylinder body 402 is provided with a pull ring, and the locking device 60 includes a third horizontal driving assembly 62 and a screw fastening head 61. The screw fastening head 61 can pass through and hook the pull ring, and pull the second cylinder body 402 closer to or away from the first cylinder body 401 under the drive of the third horizontal driving assembly 62.

[0092] In addition, if Fig.12 As shown, the screw fastening head 61 can be set at a certain angle with the driving direction of the third horizontal driving component 62, specifically, it can be set to 90 degrees. In this way, on the one hand, the screw fastening head 61 can be directed toward the first cylinder body 401, which is convenient for the fastening action of the screw 403. On the other hand, a pull ring can be provided on the second cylinder body 402, and the screw fastening head 62 can be passed through the pull ring and hooked, so as to drive the second cylinder body 402 to move closer to or away from the first cylinder body 401. Since the second cylinder body 402 is usually heavier and requires the cooperation of multiple people to complete the installation, using the locking device 60 to pull the second cylinder body can reduce the workload of personnel.

[0093] The actions of the automatic sample loading device in the present application can be automatically controlled by the control component.

[0094] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. An automatic sample loading device, characterized in that: The automatic sample loading device comprises: A support frame, a sample grabbing device and a protective shell mounting device, wherein the sample is cylindrical and has a groove extending in the radial direction of the sample on the outer circumference, and the protective shell mounting device is used to mount the sample protective shell on the sample; The sample grabbing device and the protective shell mounting device are both arranged on the support frame, and the sample grabbing device can clamp and fix the sample; The sample protection shell comprises: A body, wherein the body is an arc-shaped sheet structure and is made of a hard material with elasticity, the inner side of the body can be fitted on the outer peripheral surface of the sample and can completely cover the opening of the groove on the outer peripheral surface of the sample, and the arc angle of the body is set to be greater than 180 degrees; The automatic sample loading device further comprises a sample installation device and an experimental device, wherein the sample grabbing device can transfer the sample installed with the sample protection shell to the sample installation device, and the sample installation device can install the sample on the experimental device; The experimental device comprises a coaxially arranged incident rod, a transmission rod and a sample installation position arranged between the incident rod and the transmission rod, the sample installation device comprises a vertical drive assembly and a clamping sleeve, the clamping sleeve can clamp the sample, the sample installation position is arranged below the clamping sleeve, and the vertical drive assembly can drive the clamping sleeve to drive the sample to the sample installation position; The sample mounting device further includes a positioning assembly, the positioning assembly includes positioning sleeves arranged at both ends of the clamping sleeve, the positioning sleeve and the clamping sleeve are coaxially arranged, and the positioning sleeve can be opened and clamped on the outer circumference of the incident rod and the transmission rod respectively under the drive of the vertical driving assembly, so that the sample is coaxial with the incident rod and the transmission rod; A heating component is also arranged on the inner circumferential surface of the clamping sleeve and the positioning sleeve.

2. The automatic sample loading device according to claim 1, characterized in that: A connection structure is also fixedly arranged on the outer side of the sample protection shell; The protective shell installation device includes a first horizontal driving component and a protective shell grabbing component. The protective shell grabbing component can be detachably connected to the connecting structure. The first horizontal driving component can drive the protective shell grabbing component to move in a horizontal direction to approach or move away from the sample.

3. The automatic sample loading device according to claim 2, characterized in that: The connection structure is arranged at the center of the sample protection shell; The protective shell grabbing assembly includes a fixing portion and mounting portions respectively arranged at both ends of the fixing portion, the mounting portion is provided with a connecting piece that can match the connecting structure, and the mounting portion can approach or move away from the center position of the fixing portion.

4. The automatic sample loading device according to claim 3, characterized in that: The sample grabbing device comprises a sample grabbing assembly, the sample grabbing assembly comprises a grabbing claw and a roller arranged inside the grabbing claw, the grabbing claw can grab the sample and make the roller fit the outer peripheral surface of the sample, the roller can rotate to drive the sample to rotate around the central axis so that the cutting groove faces the installation direction of the protective shell installation device; The sample grabbing device further comprises a second horizontal driving assembly, which is capable of driving the sample grabbing assembly away from or close to the protective shell mounting device.

5. The automatic sample loading device according to claim 4, characterized in that: The support frame includes two support rods arranged opposite to each other, and the two support rods are respectively provided with a first slideway and a second slideway extending in a vertical direction, and the protective shell installation device also includes a first slider, and a side of the first horizontal driving assembly away from the protective shell grabbing assembly is connected to the first slider, and the first slider is sleeved on the first slideway and can rotate around the first slideway; The sample grabbing device comprises a second sliding block, one end of the second horizontal driving assembly away from the sample grabbing assembly is connected to the second sliding block, and the second sliding block is sleeved on the second slideway and can rotate around the second slideway.

6. The automatic sample loading device according to claim 1, characterized in that: The experimental device also includes a confining pressure cylinder capable of accommodating the sample, the confining pressure cylinder including a first cylinder body and a second cylinder body, the first cylinder body and the second cylinder body can be closed in an axial direction to place the sample in the confining pressure cylinder, the first cylinder body is sleeved on the incident rod and can slide in the axial direction of the incident rod, and the second cylinder body is sleeved on the transmission rod and can slide in the axial direction of the transmission rod; The automatic sample loading device further comprises a locking device, which can install a fixing bolt on the confining pressure cylinder and fix the first cylinder body on the second cylinder body.

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