Heavy load lifting platform applied to closed cycle ultra-low temperature sample holder

Abstract

The application provides a heavy-load lifting platform applied to a closed-cycle ultra-low-temperature sample holder, and relates to the motion control technical field of ultra-high vacuum and ultra-low-temperature experimental devices. The heavy-load lifting platform applied to the closed-cycle ultra-low-temperature sample holder comprises a support truss and a heavy-load lifting platform. The support truss comprises a support frame and a truss platform arranged on the top of the support frame. One side of the truss platform is provided with a multifunctional groove. The truss platform is further provided with a support pedal and a closing pedal used for closing the multifunctional groove. The heavy-load lifting platform is arranged on the truss platform and detachably connected with the truss platform. The inner cavity of the heavy-load lifting platform is used for placing the sample holder, the inner cavity of the heavy-load lifting platform is in communication with the multifunctional groove, and the heavy-load lifting platform is used for lifting the sample holder. The application can realize the heavy load of the sample holder, the high precision and high stability of the sample holder during lifting, the long stroke and low vibration of the lifting of the sample holder, and the application does not interfere with the magnetic field of the sample holder.

Description

Technical Field

[0001] This invention relates to the field of motion control technology for ultra-high vacuum and ultra-low temperature experimental devices, and in particular to a heavy-duty lifting platform for closed-loop ultra-low temperature sample holders. Background Technology

[0002] Angle-resolved photoelectron spectroscopy (ARPES) is currently the most important experimental technique in condensed matter physics for studying many cutting-edge issues. ARPES plays an irreplaceable role in areas such as superconductivity mechanisms, quantum materials research, and two-dimensional materials.

[0003] Extremely low temperatures reveal a multitude of novel physical properties waiting to be explored, especially since the transition temperatures of many superconducting materials are below 4.2K. However, current mainstream sample holders are generally open-loop ultra-high vacuum sample holders, which can only maintain temperatures above 6K, far from meeting the needs of extreme temperature experiments. Therefore, we need to use a new type of closed-loop ultra-low temperature sample holder. However, after the ultra-high vacuum is evacuated, a load of more than 1t will be applied to the sample holder, and the sample holder also needs to have a large lifting range.

[0004] In addition, most sample racks currently on the market have a long sample rod at the bottom. When installing the sample rack onto the mounting bracket, the sample rack needs to be hoisted first, and the height of the sample rod at the bottom of the sample rack needs to be higher than the mounting bracket. Then the sample rack is moved above the mounting bracket, and finally the sample rack is lowered so that the sample rod at the bottom of the sample rack can pass smoothly through the slot on the mounting bracket. However, this installation method has high requirements for the height limit of the indoor ceiling, and the higher the height of the sample rack hoisted, the greater the safety risk.

[0005] In summary, there is a need for a heavy-duty lifting platform that can meet the requirements of high load capacity, high precision, high stability, long stroke, low vibration, non-magnetic operation, and easy installation for use in closed-loop cryogenic sample racks. Summary of the Invention

[0006] To address the requirements of sample holders for high load capacity, high precision, high stability, long stroke, low vibration, non-magnetic properties, and ease of installation, this invention provides a heavy-duty lifting platform for closed-loop cryogenic sample holders.

[0007] The heavy-duty lifting platform for closed-loop cryogenic sample holders provided by this invention includes a support truss and a heavy-duty lifting platform. The support truss includes a support frame and a truss platform located on top of the support frame. The truss platform has a multi-functional slot with a groove facing one side of the truss platform. The truss platform also has a support step and a closing step for closing part of the multi-functional slot. The heavy-duty lifting platform is located on the truss platform and is detachably connected to the truss platform. The inner cavity of the heavy-duty lifting platform is used to place the sample holder and is connected to the multi-functional slot. The heavy-duty lifting platform is used to lift the sample holder.

[0008] In one feasible embodiment of the present invention, the heavy-duty lifting platform includes a fixed frame and a lifting assembly. The fixed frame includes a base plate and multiple side support plates disposed on the base plate. The base plate is disposed on and detachably connected to the truss platform. The base plate has a through hole, and the inner cavity of the heavy-duty lifting platform is connected to the multi-functional slot through the through hole. The lifting assembly includes a drive component and a lifting plate. The drive component is disposed on the base plate and includes multiple driven rods and multiple lifting rods. The drive shaft of the drive component is connected to two driven rods respectively through two first adapter boxes, and each driven rod is connected to two lifting rods respectively through two second adapter boxes. The drive shaft and driven rods of the drive component are parallel to the base plate, and the lifting rods are perpendicular to the base plate. The lifting plate is slidably connected to each lifting rod, and the lifting plate has a sample rack through hole. The lifting plate also has multiple lugs, which extend through the sample rack through hole towards the through hole in the base plate, and the lugs are used to support the sample rack.

[0009] In one feasible embodiment of the present invention, at least one of the following technical features is also included:

[0010] Technical feature a) The truss platform includes a truss frame and a multi-functional slot frame surrounded by the truss frame, the multi-functional slot being surrounded by the multi-functional slot frame;

[0011] Technical feature b) The lifting rod is provided with a slidably connected adapter block, the top of the adapter block is connected to the bottom of the lifting plate; the inner wall of the side support plate is provided with a slide rail, and the adapter block is slidably connected to the slide rail;

[0012] Technical feature c) The base plate is provided with a first side support plate, a second side support plate and a third side support plate in sequence. The first side support plate and the third side support plate are parallel to each other, and both the first side support plate and the third side support plate are perpendicular to the second side support plate.

[0013] Technical feature d) The truss platform is also provided with a first handrail at its edge;

[0014] Technical feature e) The top of the side support plate is further provided with a limiting plate, and the top of the lifting rod is connected to the corresponding limiting plate;

[0015] Technical feature f) The lug is also provided with a hook, which is used to connect with the hoisting robotic arm when hoisting the heavy-duty lifting platform;

[0016] Technical feature g), the lug includes a connecting plate, a side support and a bottom support connected in sequence, the connecting plate is detachably connected to the upper surface of the lifting plate, the side support is perpendicular to the connecting plate and extends through the sample holder through hole toward the bottom plate through hole, and the bottom support is perpendicular to the side support and extends toward the center point of the sample holder through hole.

[0017] Technical feature h) The multi-functional slot is provided with a splicing plate, and the two ends of the splicing plate are detachably connected to the two inner walls opposite to the multi-functional slot. The closed pedal is located above the splicing plate and is detachably connected to the splicing plate.

[0018] Technical feature i) The multifunctional groove is provided with a support plate, the two ends of the support plate are detachably connected to the two inner walls opposite to the multifunctional groove, and a vertical support is provided below the support plate, the top of the vertical support abutting against the support plate;

[0019] Technical feature j) The side support plate is also provided with a grating ruler, which is used to read the height of the sample holder;

[0020] Technical feature k) The side support plate is further provided with a rib between its outer side wall and the bottom plate;

[0021] Technical feature 1) The side support plate has a side support plate hollow.

[0022] In one feasible embodiment of the present invention, at least one of the following technical features is also included:

[0023] Technical feature a1), in technical feature a), the truss frame includes four first side bars connected in sequence to form a rectangle, the multi-functional groove frame includes three second side bars connected in sequence to form three sides of a rectangle, wherein the ends of two parallel second side bars are connected to one of the first side bars, and the first side bar has a slot that communicates with the multi-functional groove, and one or more connecting rods are provided between the corresponding first side bars and second side bars;

[0024] Technical feature a2), in technical feature a), the truss frame and the multi-functional slot frame are made of SS304 stainless steel;

[0025] Technical feature c1) In technical feature c), the lower bottom surface of the lifting plate is further provided with an auxiliary transition block, and the inner wall of the side support plate is provided with a slide rail, and the auxiliary transition block is slidably connected to the slide rail on the side support plate.

[0026] Technical feature d1), in which the material of the first handrail is SS304 stainless steel;

[0027] Technical feature e1), in technical feature e), the limiting plate is further provided with a limiting plate cutout on the side away from the side support plate;

[0028] Technical feature h1), in which the splicing plate is made of SS304 stainless steel;

[0029] Technical feature i1), in technical feature i), the material of the support plate is SS304 stainless steel;

[0030] Technical feature i2), in technical feature i), the material of the upright is aluminum;

[0031] Technical feature k1), in which the rib plate is further provided with a rib plate hollow.

[0032] In one feasible embodiment of the present invention, the support frame includes multiple heavy-duty support rods, the top of each heavy-duty support rod being connected to the bottom surface of the truss platform; and / or, the enclosed pedal is made of aluminum; and / or, the support pedal is made of aluminum.

[0033] In one feasible embodiment of the present invention, a diagonal brace is provided between the heavy-duty support rod and the bottom surface of the truss platform; and / or, one or more horizontal braces are provided between two adjacent heavy-duty support rods; and / or, the heavy-duty support rod is made of SS304 stainless steel.

[0034] In one feasible embodiment of the present invention, an escalator is also included, which is located on the side of the truss platform where the multi-functional slot is provided, and the escalator does not contact the truss platform.

[0035] In one feasible embodiment of the present invention, the bottom of the escalator is provided with casters and a telescopic rod, the telescopic rod being used to hold the ground when extended; and / or, the escalator includes multiple steps and an extension plate located at the top of the multiple steps, and a second handrail is provided on both sides of the multiple steps and the extension plate.

[0036] In one feasible embodiment of the present invention, the load of the supporting truss is >4t; and / or, the stroke of the heavy-duty lifting platform is 500-700mm; and / or, the accuracy of the heavy-duty lifting platform is <0.01mm; and / or, the vibration amplitude of the heavy-duty lifting platform when lifting the sample rack is <2μm.

[0037] This invention also provides a method for using a heavy-duty lifting platform applied to a closed-loop cryogenic sample holder, comprising the following steps:

[0038] Step 1) Install the sample holder in the heavy-duty lifting platform;

[0039] Step 2) Install the heavy-duty lifting platform and sample rack onto the truss platform via the multi-functional slot;

[0040] Step 3) Seal the multi-functional groove (13) with splicing panels;

[0041] Step 4) Install the enclosed tread onto the truss platform to enclose the multi-functional slot.

[0042] The heavy-duty lifting platform for closed-loop cryogenic sample racks provided by this invention has the following beneficial effects:

[0043] 1) This invention can achieve heavy load on the sample holder and high precision and stability during lifting and lowering. At the same time, the lifting and lowering of the sample holder has a long stroke and low vibration, and this invention will not interfere with the magnetic field of the sample holder. Furthermore, the load of the supporting truss is >4t, the stroke of the heavy-duty lifting platform is 500~700mm, the precision of the heavy-duty lifting platform is <0.01mm, and the vibration amplitude of the heavy-duty lifting platform during lifting and lowering of the sample holder is <2μm.

[0044] 2) The multi-functional slot in this invention allows sample rods to pass through, thereby enabling the heavy-duty lifting platform and sample rack to be installed on the truss platform even with ceiling height restrictions. At the same time, since the lifting height of the heavy-duty lifting platform and sample rack is relatively low, the safety of the heavy-duty lifting platform and sample rack during lifting is also improved.

[0045] 3) In this invention, the transfer block can be slidably connected to the slide rail on the side support plate. This auxiliary lifting mode can enhance the stability and safety of the sample rack when it is lifted and lowered with the lifting plate.

[0046] 4) The driving component of this invention uses a servo motor. The first adapter box uses a helical bevel gearbox, and the second adapter box uses a worm gear screw jack. The servo motor converts the voltage signal into torque and speed for drive control. Since the voltage signal can be precisely controlled, the lifting speed and position of the sample holder can be accurately controlled. The helical bevel gearbox transmits the motion and power between two intersecting shafts, which can transmit the horizontal motion output by the servo motor to other directions. Thus, the servo motor only needs to be installed at the end. The helical bevel gearbox is lightweight, transmits large torque, and starts smoothly, resulting in less vibration during startup and improving overall stability. The worm gear screw jack consists of multiple worm gear screw linear push rods to control the lifting of the cryogenic sample holder. The radial deep groove ball bearing on the worm shaft allows for high-speed, heavy-load operation, with a maximum load of up to 2 tons. The aluminum housing of the worm gear screw jack is non-magnetic and relatively stable. The choice of non-magnetic material avoids the adverse effects of magnetic fields on ARPES measurements and allows for longer working cycles. The surface feature lines increase the overall rigidity and reduce the reduction in overall stability caused by deformation. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0048] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0049] Figure 3 This is a schematic diagram of the heavy-duty lifting platform in this invention. Figure 1 .

[0050] Figure 4 This is a cross-sectional view of the heavy-duty lifting platform in this invention.

[0051] Figure 5 This is a schematic diagram of the heavy-duty lifting platform in this invention. Figure 2 .

[0052] Figure 6 This is a schematic diagram of the lifting component in this invention.

[0053] Figure 7 This is a schematic diagram of the lifting plate and slide rail of the present invention.

[0054] Figure 8 This is a schematic diagram of the lifting plate and the adapter block of the present invention.

[0055] Figure 9 This is a schematic diagram of the support frame of the present invention.

[0056] Figure 10 This is a top view of the support frame of the present invention.

[0057] Figure Labels

[0058] Support Truss 1

[0059] Support frame 11

[0060] Heavy-duty support rod 111

[0061] 112 uprights

[0062] diagonal brace 113

[0063] Horizontal brace 114

[0064] Truss Platform 12

[0065] Truss frame 121

[0066] First side rod 121.1

[0067] Connecting rod 121.2

[0068] Support pedal 122

[0069] Closed pedal 123

[0070] First handrail 124

[0071] Multi-functional slot 13

[0072] Multi-functional slot frame 131

[0073] Second side bar 132

[0074] splicing panel 133

[0075] Support plate 134

[0076] Heavy-duty lifting platform 2

[0077] Fixed frame 3

[0078] Base plate 31

[0079] 311 through holes in the base plate

[0080] Side support plate 312

[0081] First side support plate 312.1

[0082] Second side support plate 312.2

[0083] Third side support plate 312.3

[0084] 312.a Perforated side support plate

[0085] Slide rail 313

[0086] Limit plate 314

[0087] Limiting plate with hollowed-out design 314.a

[0088] 315 grating ruler

[0089] Rib 316

[0090] 316.a rib plate with openwork

[0091] Lifting component 4

[0092] Drive component 41

[0093] Lifting plate 42

[0094] Sample holder through hole 421

[0095] Driven rod 43

[0096] First junction box 431

[0097] Lifting boom 44

[0098] Second adapter box 441

[0099] Adapter 442

[0100] Auxiliary Adapter Block 443

[0101] Tuoer 45

[0102] Connector plate 451

[0103] Side support 452

[0104] Base 453

[0105] Hook 46

[0106] Escalator 5

[0107] 51 multi-level steps

[0108] Extension plate 52

[0109] Second handrail 53

[0110] 54 omnidirectional wheels

[0111] Telescopic pole 55

[0112] Sample rack 6 Detailed Implementation

[0113] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms "left side", "right side", "upper side", "lower side", "above", "below", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0114] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0115] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0116] This invention provides a heavy-duty lifting platform for use in closed-loop cryogenic sample holders, in conjunction with reference to [reference needed]. Figure 1 and Figure 2 The system includes a support truss 1 and a heavy-duty lifting platform 2. The support truss 1 includes a support frame 11 and a truss platform 12 located on top of the support frame 11. The truss platform 12 has a multi-functional slot 13 with a slot facing one side of the truss platform 12. The truss platform 12 also has a support pedal 122 and a closing pedal 123 for closing part of the multi-functional slot 13. The heavy-duty lifting platform 2 is located on the truss platform 12 and is detachably connected to the truss platform 12. The inner cavity of the heavy-duty lifting platform 2 is used to place a sample rack 6 and is connected to the multi-functional slot 13. The heavy-duty lifting platform 2 is used to lift the sample rack 6. As explained in the background section, the installation of the sample holder 6 is currently very difficult. Therefore, this invention addresses this problem. In this invention, before the heavy-duty lifting platform 2 is installed onto the truss platform 12, the sample holder 6 is first installed into the inner cavity of the heavy-duty lifting platform 2, with the sample rod protruding from the bottom of the heavy-duty lifting platform 2. Then, the entire heavy-duty lifting platform 2 is lifted by a hoisting robotic arm and moved towards the truss platform 12, allowing the sample rod to enter the multi-functional slot 13 from its opening. Finally, the heavy-duty lifting platform 2 is lowered and placed on the truss platform 12. In this way, the heavy-duty lifting platform 2 and the sample holder 6 can be installed onto the truss platform 12 even with ceiling height restrictions. At the same time, because the hoisting height of the heavy-duty lifting platform 2 and the sample holder 6 is relatively low, the safety of the heavy-duty lifting platform 2 and the sample holder 6 during hoisting is relatively improved. In addition, the closed-loop cryogenic sample holder combines mature cryogenic refrigeration technology with the traditional ARPES sample holder. Compared to conventional heat conduction methods that can only cool to 6K, it can achieve a stable cryogenic temperature of 1.52K. The closed-loop designation refers to the refrigerant. Conventional sample holders use liquid helium for heat conduction refrigeration. Liquid helium, as the refrigerant, absorbs heat and vaporizes; it is then collected or discharged but cannot be immediately liquefied and returned to the refrigeration cycle. The closed-loop cryogenic sample holder can immediately liquefy liquid nitrogen and return it to the refrigeration cycle.

[0117] For illustration, the materials used for the supporting truss 1 and the heavy-duty lifting platform 2 are materials that do not affect the magnetic field of the sample holder 6, such as a combination of SS304 stainless steel and aluminum. The load of the supporting truss 1 is >4t, the stroke of the heavy-duty lifting platform 2 is 500-700mm, preferably 600mm, the accuracy of the heavy-duty lifting platform 2 is <0.01mm, and the vibration amplitude of the heavy-duty lifting platform 2 during the lifting of the sample holder 6 is <2μm. Therefore, the present invention can achieve heavy load on the sample holder 6 and high precision and high stability during the lifting of the sample holder 6. At the same time, the lifting of the sample holder 6 has a long stroke and low vibration, and the present invention will not interfere with the magnetic field of the sample holder 6.

[0118] The heavy-duty lifting platform provided in this embodiment of the invention is applied to a closed-loop cryogenic sample holder, in conjunction with reference to [other documents / references]. Figure 3 and Figure 4 The heavy-duty lifting platform 2 includes a fixed frame 3 and a lifting assembly 4. The fixed frame 3 includes a base plate 31 and multiple side support plates 312 mounted on the base plate 31. The base plate 31 is mounted on and detachably connected to the truss platform 12. It is typically fixed to the base plate 31 and the truss platform 12 using bolts. The base plate 31 has a through hole 311. The inner cavity of the heavy-duty lifting platform 2 communicates with the multi-functional slot 13 through the through hole 311. The main function of the through hole 311 is to allow the sample rod of the sample holder 6 to pass smoothly through the base plate 31. The radius of the through hole 311 is usually larger than the radius of the sample rod of the sample holder 6, ensuring a certain gap between the sample rod and the side wall of the through hole 311. (See also...) Figure 3 , Figure 4 and Figure 6 The lifting assembly 4 includes a driving component 41 and a lifting plate 42. The driving component 41 is mounted on the base plate 31 and includes multiple driven rods 43 and multiple lifting rods 44. The driving shaft of the driving component 41 is connected to two driven rods 43 respectively through two first adapter boxes 431. Each driven rod 43 is connected to two lifting rods 44 respectively through two second adapter boxes 441. The driving shaft and driven rods 43 of the driving component 41 are parallel to the base plate 31, and the lifting rods 44 are perpendicular to the base plate 31. The lifting plate 42 is slidably connected to each lifting rod 44. The lifting plate 42 has a sample rack through hole 421. The lifting plate 42 also has multiple lugs 45, which extend through the sample rack through hole 421 toward the base plate through hole 311. The lugs 45 are used to support the sample rack 6.

[0119] Understandably, when the sample holder 6 needs to be raised or lowered, the drive shaft of the drive component 41 begins to rotate, and transmits the rotation to the driven rod 43 through the first adapter box 431, causing the driven rod 43 to rotate synchronously. The rotation of the driven rod 43 is then transmitted to the lifting rod 44 through the second adapter box 441, causing the lifting rod 44 to rotate synchronously. While the lifting rod 44 is rotating, the lifting plate 42 can move up and down along the lifting rod 44. The raising and lowering of the lifting plate 42 can drive the raising and lowering of the lug 45, which in turn can directly drive the raising and lowering of the sample holder 6, thus completing the control of the raising and lowering of the sample holder 6. The motion mode between the lifting rod 44 and the adapter block 442 can be referenced from that of a ball screw.

[0120] In one specific embodiment, the drive unit 41 is preferably a servo motor, the first adapter box 431 is preferably a helical bevel gearbox, and the second adapter box 441 is preferably a worm gear screw jack. It is understood that the servo motor converts the voltage signal into torque and speed for drive control. Since the voltage signal can be precisely controlled, the lifting speed and position of the sample holder 6 can be accurately controlled. The helical bevel gearbox transmits motion and power between two intersecting shafts, allowing the horizontal motion output by the servo motor to be transmitted to other directions. Thus, the servo motor only needs to be installed at the end. This helical bevel gearbox is lightweight, transmits high torque, and starts smoothly, resulting in less vibration during startup and improving overall stability. The worm gear screw jack consists of multiple worm gear screw linear actuators used to control the lifting and lowering of the cryogenic sample holder. The radial deep groove ball bearings on the worm shaft allow for high-speed, heavy-load operation, with a maximum load of up to 2 tons. The aluminum housing of the worm gear screw jack is non-magnetic and relatively stable. The choice of non-magnetic materials avoids the adverse effects of magnetic fields on ARPES measurements and allows for longer working cycles. The characteristic contours of the surface increase the overall rigidity and reduce the impact of deformation on overall stability.

[0121] The heavy-duty lifting platform provided in this embodiment of the invention, applied to a closed-loop cryogenic sample holder, is described in reference [reference needed]. Figure 6 , Figure 3 and Figure 4 As an auxiliary reference, the lifting rod 44 is provided with a slidably connected adapter block 442, the top of which is connected to the bottom of the lifting plate 42; the inner wall of the side support plate 312 is provided with a slide rail 313, and each adapter block 442 is slidably connected to the corresponding slide rail 313. This auxiliary lifting mode, in which the adapter block 442 and the slide rail 313 cooperate, can enhance the stability and safety of the sample rack 6 when it rises and falls with the lifting plate 42. For illustration, the lifting plate 42 should maintain a parallel relationship with the base plate 31 when it rises and falls within the cavity of the heavy-duty lifting platform 2 to ensure the stability of the sample rack 6.

[0122] In some of these embodiments, in conjunction with reference to Figure 3 and Figure 5 , Figure 4 For auxiliary reference, the base plate 31 is provided with a first side support plate 312.1, a second side support plate 312.2, and a third side support plate 312.3 in sequence. The first side support plate 312.1 and the third side support plate 312.3 are parallel to each other, and both the first side support plate 312.1 and the third side support plate 312.3 are perpendicular to the second side support plate 312.2. In a preferred embodiment, the inner walls of the first side support plate 312.1 and the third side support plate 312.3 are each provided with two slide rails 313, and each of the four lifting rods 44 is provided with a transition block 442. These four transition blocks 442 are slidably connected to the matching slide rails 313.

[0123] Optional, see also Figure 3 and Figure 5 , Figure 4 As an auxiliary reference, the side support plate 312 is provided with a side support plate cutout 312.a to reduce the weight of the side support plate 312. Furthermore, the first side support plate 312.1, the second side support plate 312.2 and the third side support plate 312.3 are all provided with a side support plate cutout 312.a.

[0124] Optionally, refer to Figure 7 and Figure 8 , Figure 3 As an auxiliary reference, the lower surface of the lifting plate 42 is also provided with an auxiliary transition block 443, and the inner wall of the second side support plate 312.2 is provided with a slide rail 313. The auxiliary transition block 443 is slidably connected to the slide rail 313 on the second side support plate 312.2, further enhancing the stability of the sample holder 6 when it rises and falls with the lifting plate 42. Preferably, the lower surface of the lifting plate 42 is provided with two auxiliary transition blocks 443, and the inner wall of the second side support plate 312.2 is provided with two slide rails 313. These two auxiliary transition blocks 443 are slidably connected to the corresponding slide rails 313.

[0125] Optionally, refer to Figure 3 and Figure 5 , Figure 4 As an auxiliary reference, the top of the side support plate 312 is also provided with a limiting plate 314, which is perpendicular to the side support plate 312. The top of the lifting rod 44 is connected to the corresponding limiting plate 314. When the lifting plate 42 rises and falls in the inner cavity of the heavy-duty lifting platform 2, the limiting plate 314 can limit the top of the lifting plate 42 to prevent the lifting plate 42 from overextending. Furthermore, the side of the limiting plate 314 away from the side support plate 312 is also provided with a limiting plate cutout 314.a. The limiting plate cutout 314.a can relatively reduce the weight of the limiting plate 314, thereby reducing the pressure of the limiting plate 314 on the side support plate 312. In a feasible embodiment, see [reference]. Figure 1Limiting plates 314 are provided on the top of the first side support plate 312.1 and the third side support plate 312.3.

[0126] In some of these embodiments, see Figure 4 The lug 45 includes a connecting plate 451, a side support 452, and a bottom support 453 connected in sequence. The connecting plate 451 is detachably connected to the upper surface of the lifting plate 42. The side support 452 is perpendicular to the connecting plate 451 and extends through the sample holder through hole 421 toward the bottom plate through hole 311. The bottom support 453 is perpendicular to the side support 452 and extends toward the center point of the sample holder through hole 421. Furthermore, the bottom support 453 has one or more bottom support cutouts to reduce its weight. For illustration, when installing the sample holder 6 into the inner cavity of the heavy-duty lifting platform 2, the connecting plate 451 and the upper surface of the lifting plate 42 are first connected by screws. Then, the bottom of the sample holder 6 is placed on the bottom support 453, and the bottom of the sample holder 6 and the bottom support 453 are connected by screws. Furthermore, the outer wall of the side support 452 typically does not contact the side wall of the sample holder through hole 421, and the side wall of the sample holder 6 does not contact the inner wall of the side support 452. The shape of the side support 452 corresponds to the side wall of the sample holder 6. In a preferred embodiment, see reference to... Figure 3 and Figure 5 The lifting plate 42 is provided with four lugs 45, and the included angle between any two adjacent lugs 45 and the center point of the lifting plate 42 is 90°.

[0127] Optionally, refer to Figure 3 , Figure 4 and Figure 5 The lug 45 is also provided with a hook 46, which is used to connect with the hoisting robot arm when hoisting the heavy-duty lifting platform 2.

[0128] The heavy-duty lifting platform provided in this embodiment of the invention, applied to a closed-loop cryogenic sample holder, is described in reference [reference needed]. Figure 7 , Figure 3 As an auxiliary reference, the side support plate 312 is also provided with a grating ruler 315, which is used to read the height of the sample holder 6. Optionally, a rib plate 316 is also provided between the outer side wall of each side support plate 312 and the bottom plate 31. Further, the rib plate 316 has a rib plate cutout 316.a to reduce the weight of the rib plate 316.

[0129] The heavy-duty lifting platform provided in this embodiment of the invention is applied to a closed-loop cryogenic sample holder, in conjunction with reference to [other documents / references]. Figure 9 and Figure 10 The truss platform 12 includes a truss frame 121 and a multi-functional slot frame 131 surrounded by the truss frame 121, wherein the multi-functional slot 13 is surrounded by the multi-functional slot frame 131. In one specific embodiment, see [reference needed]. Figure 10The truss frame 121 includes four first side bars 121.1 connected in sequence to form a rectangle. The multi-functional slot frame 131 includes three second side bars 132 connected in sequence to form three sides of a rectangle. The ends of two parallel second side bars 132 are connected to one of the first side bars 121.1. The first side bar 121.1 has a slot that communicates with the multi-functional slot 13, so that the multi-functional slot 13 communicates with the external space. Further, refer to... Figure 1 Two parallel second side bars 132 can respectively correspond to two parallel first side bars 121.1 in the truss frame 121. One or more connecting bars 121.2 are provided between the corresponding first side bars 121.1 and second side bars 132. Furthermore, the connecting bars 121.2 are arranged perpendicularly to the first side bars 121.1 and second side bars 132. In a preferred embodiment, two connecting bars 121.2 are provided between the corresponding first side bars 121.1 and second side bars 132.

[0130] Optional, see also Figure 1 , Figure 2 or Figure 9 The truss platform 12 is also provided with a first handrail 124 at its edge, which can prevent experimental personnel from accidentally falling from the truss platform 12.

[0131] Optionally, see Figure 10 , Figure 9 As an auxiliary reference, the multi-functional groove 13 is provided with splicing plates 133. The two ends of the splicing plates 133 are detachably connected to the two inner walls of the multi-functional groove 13. The enclosing pedal 123 is located above the splicing plates 133 and is detachably connected to them. It is understood that the splicing plates 133 can only be installed after the heavy-duty lifting platform 2 is installed on the truss platform 12. The position of the splicing plates 133 is close to the opening of the multi-functional groove 13, which serves to both enclose the multi-functional groove 13 and provide support for the enclosing pedal 123, preventing the middle part of the enclosing pedal 123 from collapsing downwards. In a specific embodiment, two splicing plates 133 are provided. One splicing plate 133 is used to enclose the opening of the multi-functional groove 13, and the other splicing plate 133 is located in the middle of the multi-functional groove 13 to provide support for the enclosing pedal 123. In one feasible embodiment, the two ends of the splicing plate 133 abut against the two opposing inner walls of the multi-functional groove 13, the upper surface of the splicing plate 133 is connected to the upper surface of the truss platform 12 by an upper adapter plate and screws, and the lower surface of the splicing plate 133 is connected to the lower surface of the truss platform 12 by a lower adapter plate and screws.

[0132] Optionally, see Figure 10 , Figure 9As an auxiliary reference, the multifunctional groove 13 is provided with a support plate 134. The two ends of the support plate 134 are detachably connected to the two inner walls of the multifunctional groove 13. A vertical support 112 is also provided below the support plate 134, with the top of the vertical support 112 abutting against the support plate 134. It is understood that, similar to the splicing plate 133, the support plate 134 can only be installed after the heavy-duty lifting platform 2 is installed on the truss platform 12. The position of the support plate 134 is closer to the bottom of the multifunctional groove 13 than the splicing plate 133, but it cannot contact the sample rod. In one feasible embodiment, the upper surface of the support plate 134 is connected to the lower surface of the truss platform 12 by screws.

[0133] Preferably, the truss frame 121, multi-functional slot frame 131, connecting rod 121.2, first handrail 124, splicing plate 133 and support plate are all made of SS304 stainless steel to improve the overall rigidity of the truss platform 12 and enhance its load-bearing capacity.

[0134] The heavy-duty lifting platform provided in this embodiment of the invention, applied to a closed-loop cryogenic sample holder, is described in reference [reference needed]. Figure 9 The support frame 11 includes multiple heavy-duty support rods 111, the top of each of which is connected to the bottom surface of the truss platform 12. In one specific embodiment, four heavy-duty support rods 111 are included, the tops of which respectively abut against the four bottom corners of the truss platform 12.

[0135] The heavy-duty lifting platform provided in this embodiment of the invention, applied to a closed-loop cryogenic sample holder, is described in reference [reference needed]. Figure 9 , Figure 1 and Figure 2 As an auxiliary reference, a diagonal brace 113 is also provided between the heavy-duty support rod 111 and the bottom surface of the truss platform 12. The diagonal brace 113 can improve the connection strength between the heavy-duty support rod 111 and the truss platform 12. Optionally, one or more horizontal braces 114 are also provided between two adjacent heavy-duty support rods 111. The horizontal braces 114 can also improve the connection strength between the heavy-duty support rod 111 and the truss platform 12.

[0136] Preferably, the upright support 112 is made of aluminum, and the heavy-duty support rod 111, the diagonal brace 113 and the horizontal brace 114 are all made of SS304 stainless steel, so as to improve the overall rigidity of the support frame 11 and enhance the load-bearing capacity of the support frame 11.

[0137] The heavy-duty lifting platform provided in this embodiment of the invention, applied to a closed-loop cryogenic sample holder, is described in reference [reference needed]. Figure 1The system also includes an escalator 5, which is located on the side of the truss platform 12 where the multi-functional slot 13 is located. The escalator 5 does not contact the truss platform 12. Since the sample rod has a certain height, the truss platform 12 also has a certain height. The escalator 5 helps the experimenter climb onto the truss platform 12 to operate the sample rack 6. It is important to emphasize that, to ensure the stability of the sample rack 6, the escalator 5 does not contact the truss platform 12, preventing vibrations from the experimenter climbing the escalator from being transmitted to the truss platform 12, thus ensuring the stability of the sample rack 6.

[0138] Optionally, the escalator 5 is equipped with casters 54 and a telescopic rod 55 at its bottom. The casters 54 are used to move the escalator 5, and the telescopic rod 55 is used to hold the escalator against the ground when extended. Optionally, the escalator 5 includes multiple steps 51 and an extension plate 52 located at the top of the multiple steps 51. Second handrails 53 are provided on both sides of the multiple steps 51 and the extension plate 52. The second handrails 53 help researchers climb the escalator and prevent them from falling accidentally.

[0139] This invention also provides a method for using a heavy-duty lifting platform applied to a closed-loop cryogenic sample holder, comprising the following steps:

[0140] Step 1) Install the sample holder 6 into the heavy-duty lifting platform 2;

[0141] Step 2) Install the heavy-duty lifting platform 2 and sample rack 6 onto the truss platform 12 via the multi-functional slot 13;

[0142] Step 3) Seal the multi-functional groove 13 with splicing plate 133;

[0143] Step 4) Install the enclosed pedal 123 onto the truss platform 12.

[0144] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A heavy-duty lifting platform for use in closed-loop cryogenic sample holders, characterized in that: The system includes a support truss (1) and a heavy-duty lifting platform (2). The support truss (1) includes a support frame (11) and a truss platform (12) located on top of the support frame (11). The truss platform (12) has a multi-functional slot (13) with a slot facing one side of the truss platform (12). The truss platform (12) is also provided with a support step (122) and a closing step (123) for closing part of the multi-functional slot (13). The heavy-duty lifting platform (2) is located on the truss platform (12) and is detachably connected to the truss platform (12). The inner cavity of the heavy-duty lifting platform (2) is used to place the sample rack and the inner cavity of the heavy-duty lifting platform (2) is connected to the multi-functional slot (13). The heavy-duty lifting platform (2) is used to lift the sample rack. The truss platform (12) includes a truss frame (121) and a multi-functional slot frame (131) surrounded by the truss frame (121), the multi-functional slot (13) being surrounded by the multi-functional slot frame (131). The truss frame (121) includes four first side bars (121.1) connected in sequence to form a rectangle. The multi-functional groove frame (131) includes three second side bars (132) connected in sequence to form three sides of a rectangle. The ends of two parallel second side bars (132) are connected to one of the first side bars (121.1). The first side bar (121.1) has a slot that communicates with the multi-functional groove (13). One or more connecting rods (121.2) are provided between the corresponding first side bar (121.1) and the second side bar (132).

2. The heavy-duty lifting platform for a closed-loop cryogenic sample holder according to claim 1, characterized in that: The heavy-duty lifting platform (2) includes a fixed frame (3) and a lifting assembly (4). The fixed frame (3) includes a base plate (31) and multiple side support plates (312) on the base plate (31). The base plate (31) is located on the truss platform (12) and is detachably connected to the truss platform (12). The base plate (31) has a base plate through hole (311). The inner cavity of the heavy-duty lifting platform (2) is connected to the multi-functional slot (13) through the base plate through hole (311). The lifting assembly (4) includes a driving component (41) and a lifting plate (42). The driving component (41) is mounted on the base plate (31) and also includes multiple driven rods (43) and multiple lifting rods (44). The driving shaft of the driving component (41) is connected to two driven rods (43) respectively through two first adapter boxes (431). Each driven rod (43) is connected to two lifting rods (44) respectively through two second adapter boxes (441). The drive shaft and driven rod (43) of the drive component (41) are parallel to the base plate (31), and the lifting rod (44) is perpendicular to the base plate (31). The lifting plate (42) can be slidably connected to each lifting rod (44). The lifting plate (42) is provided with a sample rack through hole (421). The lifting plate (42) is also provided with a plurality of lugs (45). The lugs (45) extend through the sample rack through hole (421) toward the base plate through hole (311). The lugs (45) are used to support the sample rack.

3. The heavy-duty lifting platform for a closed-loop cryogenic sample holder according to claim 2, characterized in that, It also includes at least one of the following technical features: Technical feature b) The lifting rod (44) is provided with a slidably connected adapter block (442), the top of the adapter block (442) is connected to the bottom of the lifting plate (42); the inner wall of the side support plate (312) is provided with a slide rail (313), and the adapter block (442) is slidably connected to the corresponding slide rail (313); Technical feature c), the base plate (31) is provided with a first side support plate (312.1), a second side support plate (312.2) and a third side support plate (312.3) in sequence, the first side support plate (312.1) and the third side support plate (312.3) are parallel to each other, and the first side support plate (312.1) and the third side support plate (312.3) are both perpendicular to the second side support plate (312.2); Technical feature d), the truss platform (12) is also provided with a first handrail (124) at the edge. Technical feature e), the top of the side support plate (312) is also provided with a limiting plate (314), and the top of the lifting rod (44) is connected to the corresponding limiting plate (314); Technical feature f), the lug (45) is also provided with a hook (46), the hook (46) is used to connect with the hoisting robot arm when hoisting the heavy-duty lifting platform (2); Technical feature g), the lug (45) includes a connecting plate (451), a side support (452) and a bottom support (453) connected in sequence. The connecting plate (451) is detachably connected to the upper surface of the lifting plate (42). The side support (452) is perpendicular to the connecting plate (451) and extends through the sample holder through hole (421) toward the bottom plate through hole (311). The bottom support (453) is perpendicular to the side support (452) and extends toward the center point of the sample holder through hole (421). Technical feature h), the multi-functional groove (13) is provided with a splicing plate (133), the two ends of the splicing plate (133) are detachably connected to the two inner walls opposite to the multi-functional groove (13), and the closed pedal (123) is located above the splicing plate (133) and is detachably connected to the splicing plate (133); Technical feature i), the multi-functional groove (13) is provided with a support plate (134), the two ends of the support plate (134) are detachably connected to the two inner walls opposite to the multi-functional groove (13), and a vertical support (112) is provided below the support plate (134), the top of the vertical support (112) abuts against the support plate (134). Technical feature j), the side support plate (312) is also provided with a grating ruler (315), the grating ruler (315) is used to read the height of the sample holder; Technical feature k), a rib (316) is also provided between the outer side wall of the side support plate (312) and the bottom plate (31). Technical feature 1), the side support plate (312) is provided with a side support plate cutout (312.a).

4. The heavy-duty lifting platform for a closed-loop cryogenic sample holder according to claim 1, characterized in that, Also includes: The truss frame (121) and the multi-functional slot frame (131) are made of SS304 stainless steel.

5. The heavy-duty lifting platform for a closed-loop cryogenic sample holder according to claim 3, characterized in that, It also includes at least one of the following technical features: Technical feature c1), in technical feature c), the lower bottom surface of the lifting plate (42) is also provided with an auxiliary transition block (443), and the inner wall of the second side support plate (312.2) is provided with a slide rail (313), and the auxiliary transition block (443) and the slide rail (313) on the second side support plate (312.2) are slidably connected; Technical feature d1), in technical feature d), the material of the first handrail (124) is SS304 stainless steel; Technical feature e1), in technical feature e), the limiting plate (314) is further provided with a limiting plate cutout (314.a) on the side away from the side support plate (312). Technical feature h1), in technical feature h), the splicing plate (133) is made of SS304 stainless steel; Technical feature i), in technical feature i), the material of the support plate (134) is SS304 stainless steel; Technical feature i) In technical feature i), the material of the upright (112) is aluminum; Technical feature k1), in technical feature k), the rib (316) is further provided with rib cutout (316.a).

6. The heavy-duty lifting platform for a closed-loop cryogenic sample holder according to claim 1, characterized in that: The support frame (11) includes multiple heavy-duty support rods (111), the top of each heavy-duty support rod (111) being connected to the bottom surface of the truss platform (12); and / or, the closed pedal (123) is made of aluminum; and / or, the support pedal (122) is made of SS304 stainless steel.

7. The heavy-duty lifting platform for a closed-loop cryogenic sample holder according to claim 5, characterized in that: A diagonal brace (113) is provided between the heavy-duty support rod (111) and the bottom surface of the truss platform (12); and / or, one or more horizontal braces (114) are provided between two adjacent heavy-duty support rods (111); and / or, the heavy-duty support rod (111) is made of SS304 stainless steel.

8. The heavy-duty lifting platform for a closed-loop cryogenic sample holder according to claim 1, characterized in that: It also includes an escalator (5), which is located on the side of the truss platform (12) with a multi-functional slot (13), and the escalator (5) does not contact the truss platform (12).

9. The heavy-duty lifting platform for a closed-loop cryogenic sample holder according to claim 8, characterized in that: The bottom of the escalator (5) is provided with casters (54) and telescopic rods (55), the telescopic rods (55) being used to hold the ground when extended; and / or, the escalator (5) includes multiple steps (51) and an extension plate (52) located at the top of the multiple steps (51), and a second handrail (53) is provided on both sides of the multiple steps (51) and the extension plate (52).

10. The heavy-duty lifting platform for a closed-loop cryogenic sample holder according to claim 1, characterized in that: The load of the supporting truss (1) is >4 t; and / or the stroke of the heavy-duty lifting platform (2) is 500~700 mm; and / or the accuracy of the heavy-duty lifting platform (2) is <0.01 mm; and / or the vibration amplitude of the heavy-duty lifting platform (2) when lifting the sample rack is <2 μm.

11. A method of using a heavy-duty lifting platform for a closed-loop cryogenic sample holder as described in any one of claims 1 to 9, comprising the following steps: Step 1) Install the sample holder in the heavy-duty lifting platform (2); Step 2) Install the heavy-duty lifting platform (2) and sample rack onto the truss platform (12) via the multi-functional slot (13); Step 3) Close the multi-functional groove (13) with splicing plate (133); Step 4) Install the enclosed tread (123) onto the truss platform (12).

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