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

Abstract

The invention provides a heavy-load type lifting platform applied to a closed-cycle ultra-low-temperature sample holder, and relates to the technical field of motion control of ultra-high vacuum and ultra-low-temperature experimental devices. The heavy-load type lifting platform applied to the closed-cycle extremely-low-temperature sample holder comprises a supporting truss and a heavy-load lifting platform body, the supporting truss comprises a supporting frame and a truss platform arranged on the top of the supporting frame, and a multifunctional groove is formed in one side of the truss platform; the truss platform is further provided with a supporting pedal and a sealing pedal used for sealing the multifunctional groove. The heavy-load lifting platform is arranged on the truss platform and detachably connected with the truss platform, an inner cavity of the heavy-load lifting platform is used for containing the sample frame and communicates with the multifunctional groove, and the heavy-load lifting platform is used for lifting the sample frame. According to the invention, heavy load of the sample holder and high precision and high stability of the sample holder during lifting can be realized, the lifting of the sample holder has long stroke and low vibration, and the magnetic field of the sample holder is not interfered.

Description

Technical Field

[0001] The invention relates to the technical field of motion control of ultra-high vacuum and ultra-low temperature experimental devices, in particular to a heavy-duty lifting platform applied to a closed-cycle ultra-low temperature sample rack. Background Art

[0002] Angle-resolved photoelectron spectroscopy (ARPES) is the most important experimental method for studying many cutting-edge issues in condensed matter physics. ARPES plays an irreplaceable role in superconductivity mechanism, quantum material research, two-dimensional materials, etc.

[0003] There are many novel physical properties waiting to be explored at extremely low temperatures, especially the transition temperatures of many superconducting materials are below 4.2K. However, the current mainstream sample holders are generally open-cycle ultra-high vacuum sample holders, and the temperature that can be obtained can only be maintained above 6K, which is far from meeting the needs of extreme temperature experiments. Therefore, we need to use a new type of closed-cycle ultra-low temperature sample holder. However, after the ultra-high vacuum is drawn, a load of more than 1t will be applied to the sample holder, and the sample holder must also have a larger lifting range.

[0004] In addition, the sample racks currently used in the market generally have a longer sample rod at the bottom. When installing the sample rack on 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 is higher than the mounting bracket, and 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 smoothly pass through the slot on the mounting bracket. However, this installation method has great requirements on the height limit of the indoor ceiling, and the higher the height of the sample rack hoisting, the greater the safety risk.

[0005] In summary, a heavy-duty lifting platform for closed-cycle ultra-low temperature sample holders is needed that can achieve high load, high precision, high stability, long stroke, low vibration, no magnetic requirements and easy installation. Summary of the invention

[0006] In order to solve the problem that the sample rack needs to have high load, high precision, high stability, long stroke, low vibration, no magnetism and easy installation, the present invention provides a heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack.

[0007] The heavy-load lifting platform used for closed-cycle ultra-low temperature sample rack provided by the present invention includes a supporting truss and a heavy-load lifting platform, the supporting truss includes a supporting frame and a truss platform arranged on the top of the supporting frame, the truss platform is provided with a multi-function slot slotted toward one side of the truss platform; the truss platform is also provided with a supporting pedal and a closing pedal for closing part of the multi-function slot; the heavy-load lifting platform is arranged on the truss platform and is detachably connected to the truss platform, the inner cavity of the heavy-load lifting platform is used to place the sample rack and the inner cavity of the heavy-load lifting platform is connected to the multi-function slot, and the heavy-load lifting platform is used to lift the sample rack.

[0008] In a feasible embodiment of the present invention, the heavy-load lifting platform includes a fixed frame and a lifting assembly, the fixed frame includes a base plate and a plurality of side support plates arranged on the base plate; the base plate is arranged on the truss platform and is detachably connected to the truss platform, a base plate through hole is provided in the base plate, and the inner cavity of the heavy-load lifting platform is connected with the multi-functional groove through the base plate through hole; the lifting assembly includes a driving member and a lifting plate, the driving member is arranged on the base plate, and also includes a plurality of driven rods and a plurality of lifting rods, the driving shaft of the driving member is respectively connected to the two driven rods through two first transfer boxes, and each driven rod is respectively connected to the two lifting rods through two second transfer boxes; the driving shaft and the driven rod of the driving member are parallel to the base plate, and the lifting rod is perpendicular to the base plate; the lifting plate and each lifting rod can be slidably connected, and a sample rack through hole is provided in the lifting plate; a plurality of supporting ears are also provided on the lifting plate, and the supporting ears extend through the sample rack through hole to the direction of the base plate through hole, and the supporting ears are used to support the sample rack.

[0009] In a feasible implementation manner 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 multifunctional slot frame surrounded by the truss frame, and the multifunctional slot is surrounded by the multifunctional slot frame;

[0011] Technical feature b): the lifting rod is provided with a transfer block slidably connected thereto, the top of the transfer 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 transfer block is slidably connected to the slide rail;

[0012] Technical feature c), the bottom 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 the first side support plate and the third side support plate are perpendicular to the second side support plate;

[0013] Technical feature d), a first handrail is further provided at the edge of the truss platform;

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

[0015] Technical feature f), the support ear is also provided with a hook, and the hook is used to connect with the hoisting mechanical arm when hoisting the heavy-load lifting platform;

[0016] Technical feature g), the support ear includes a connecting plate, a side support and a bottom support which are 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 rack 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 rack through-hole.

[0017] Technical feature h), a splicing plate is provided in the multifunctional groove, two ends of the splicing plate are detachably connected to two inner walls opposite to the multifunctional groove, and the closed pedal is provided above the splicing plate and is detachably connected to the splicing plate;

[0018] Technical feature i): a support plate is provided in the multifunctional slot, and the two ends of the support plate are detachably connected to the two inner walls opposite to the multifunctional slot, and a vertical support is provided below the support plate, and the top of the vertical support supports the support plate;

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

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

[0021] Technical feature 1), the side support plate is provided with a side support plate hollowing out.

[0022] In a feasible implementation manner 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 multifunctional slot frame includes three second side bars connected in sequence to form three sides of the rectangle, wherein the ends of two parallel second side bars are connected to one of the first side bars, and the first side bar is provided with a slot connected to the multifunctional slot, and one or more connecting bars are further provided between the corresponding first side bars and the second side bars;

[0024] Technical feature a2), in technical feature a), the material of the truss frame and the multifunctional slot frame is 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 transfer block, the inner wall of the side support plate is provided with a slide rail, and the auxiliary transfer block is slidably connected to the slide rail on the side support plate;

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

[0027] Technical feature e1), in the technical feature e), a side of the limit plate away from the side support plate is further provided with a limit plate hollowing;

[0028] Technical feature h1), in technical feature h), the material of the splicing plate is SS304 stainless steel;

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

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

[0031] Technical feature k1): In technical feature k), the ribs are further provided with rib hollowing.

[0032] In a feasible embodiment of the present invention, the support frame includes a plurality of heavy-loaded support rods, and the top of each of the heavy-loaded support rods is connected to the bottom surface of the truss platform; and / or, the closed pedal is made of aluminum; and / or, the support pedal is made of aluminum.

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

[0034] In a feasible implementation manner of the present invention, an escalator is further included, and the escalator is located on a side of the truss platform where the multifunctional slot is provided, and the escalator is not in contact with the truss platform.

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

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

[0037] The present invention also provides a method for using a heavy-duty lifting platform for a closed-cycle ultra-low temperature sample rack, comprising the following steps:

[0038] Step 1) Install the sample rack in a heavy-load lifting platform;

[0039] Step 2) installing the heavy-load lifting platform and the sample rack on the truss platform through the multi-functional slot;

[0040] Step 3) closing the multifunctional slot (13) with a splicing plate;

[0041] Step 4) Install the closing pedal onto the truss platform to close the multi-purpose slot.

[0042] The heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack provided by the present invention has the following beneficial effects:

[0043] 1) The present invention can achieve heavy load on the sample rack and high precision and high stability of the sample rack when lifting. At the same time, the lifting of the sample rack has a long stroke and low vibration, and the present invention will not interfere with the magnetic field of the sample rack; further, the load of the supporting truss is greater than 4t, the stroke of the heavy-load lifting platform is 500-700mm, the accuracy of the heavy-load lifting platform is less than 0.01mm, and the vibration amplitude of the heavy-load lifting platform when lifting the sample rack is less than 2μm.

[0044] 2) The multifunctional slot in the present invention allows the sample rod to pass through, so that the heavy-load lifting platform and the sample rack can be installed on the truss platform under the condition of ceiling height limit. At the same time, since the lifting height of the heavy-load lifting platform and the sample rack is relatively low, the safety of the heavy-load lifting platform and the sample rack during lifting is relatively improved.

[0045] 3) In the present 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 part of the present invention adopts a servo motor, the first adapter box adopts a helical bevel gear box, and the second adapter box adopts a worm screw screw elevator. The servo motor is used to convert the voltage signal into torque and speed for driving control. Since the voltage signal can be accurately controlled, the speed and lifting position of the sample rack can be accurately controlled. The helical bevel gear box transmits the motion and power between the two intersecting axes, and can transmit the horizontal motion output by the servo motor to other directions. In this way, the servo motor only needs to be installed at the end. The helical bevel gear box is light in weight, has a large torque transmission, and starts smoothly, so the vibration caused when it starts is small, which improves the overall stability. The worm screw screw elevator is composed of a plurality of worm screw linear push rods to control the lifting of the extremely low temperature sample rack. The radial deep groove ball bearing on the worm shaft allows it to run at high speed and heavy load, and the maximum load can reach 2 tons. The aluminum casing material of the worm screw screw elevator is non-magnetic and relatively stable. The selection of non-magnetic materials can avoid the adverse effects of magnetic fields on ARPES measurements, and can be used for a longer working cycle. The characteristic lines on the surface increase the overall stiffness and reduce the reduction of overall stability due to deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 .

[0048] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 .

[0049] Figure 3 The structure of the heavy-duty lifting platform in the present invention is shown in FIG. Figure 1 .

[0050] Figure 4 It is a cross-sectional view of the heavy-load lifting platform of the present invention.

[0051] Figure 5 The structure of the heavy-duty lifting platform in the present invention is shown in FIG. Figure 2 .

[0052] Figure 6 It is a structural schematic diagram of the lifting assembly in the present invention.

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

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

[0055] Fig. 9 It is a structural schematic diagram of the support frame of the present invention.

[0056] Fig.10 It is a top view of the support frame of the present invention.

[0057] Reference numerals

[0058] Support truss 1

[0059] Support frame 11

[0060] Heavy-duty support rod 111

[0061] Stand support 112

[0062] Diagonal brace 113

[0063] Cross brace 114

[0064] Truss platform 12

[0065] Truss frame 121

[0066] First side bar 121.1

[0067] Connecting rod 121.2

[0068] Support pedal 122

[0069] Closed pedal 123

[0070] First handrail 124

[0071] Multi-function slot 13

[0072] Multifunctional slot frame 131

[0073] Second side bar 132

[0074] Splicing board 133

[0075] Support plate 134

[0076] Heavy load lifting platform 2

[0077] Fixed frame 3

[0078] Bottom plate 31

[0079] Bottom plate through hole 311

[0080] Side support board 312

[0081] First side support plate 312.1

[0082] Second side support plate 312.2

[0083] The third side support plate 312.3

[0084] Side support plate hollow 312.a

[0085] Slide 313

[0086] Limiting plate 314

[0087] Limiting plate hollow 314.a

[0088] Linear ruler 315

[0089] Rib 316

[0090] Rib hollow 316.a

[0091] Lifting assembly 4

[0092] Driving member 41

[0093] Lifting plate 42

[0094] Sample holder through hole 421

[0095] Follower rod 43

[0096] First transfer box 431

[0097] Lifting rod 44

[0098] Second transfer box 441

[0099] Transfer block 442

[0100] Auxiliary adapter block 443

[0101] Tor 45

[0102] Connecting plate 451

[0103] Side support 452

[0104] Bottom bracket 453

[0105] Hook 46

[0106] Escalator 5

[0107] Multi-level stairs 51

[0108] Extension plate 52

[0109] Second handrail 53

[0110] Universal wheel 54

[0111] Telescopic rod 55

[0112] Sample rack 6 DETAILED DESCRIPTION

[0113] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work belong to the scope of protection of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "left side", "right side", "upper side", "lower side", "above", "below" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0114] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0116] The embodiment of the present invention provides a heavy-duty lifting platform for a closed-cycle ultra-low temperature sample rack. Figure 1 and Figure 2 , including a supporting truss 1 and a heavy-load lifting platform 2, the supporting truss 1 including a supporting frame 11 and a truss platform 12 arranged on the top of the supporting frame 11, the truss platform 12 is provided with a multi-function slot 13 slotted toward one side of the truss platform 12; the truss platform 12 is also provided with a supporting pedal 122 and a closing pedal 123 for closing part of the multi-function slot 13; the heavy-load lifting platform 2 is arranged on the truss platform 12 and is detachably connected to the truss platform 12, the inner cavity of the heavy-load lifting platform 2 is used to place the sample rack 6 and the inner cavity of the heavy-load lifting platform 2 is communicated with the multi-function slot 13, and the heavy-load lifting platform 2 is used to lift the sample rack 6. As an illustration, as described in the background technology, it is currently very difficult to install the sample rack 6, so the present invention solves this problem. In the present invention, before the heavy-load lifting platform 2 is installed on the truss platform 12, the sample rack 6 is first installed in the inner cavity of the heavy-load lifting platform 2, and the sample rod passes through the bottom of the heavy-load lifting platform 2. Then, the entire heavy-load lifting platform 2 is lifted by the lifting mechanical arm, and then the heavy-load lifting platform 2 is moved toward the truss platform 12, so that the sample rod enters the multi-functional groove 13 from the notch of the multi-functional groove 13, and finally, the heavy-load lifting platform 2 is lowered so that the heavy-load lifting platform 2 is placed on the truss platform 12. In this way, the heavy-load lifting platform 2 and the sample rack 6 can be installed on the truss platform 12 under the condition of ceiling height limit. At the same time, since the lifting height of the heavy-load lifting platform 2 and the sample rack 6 is relatively low, the safety of the heavy-load lifting platform 2 and the sample rack 6 during lifting is relatively improved. As a supplement, the closed-loop cryogenic sample holder combines mature cryogenic refrigeration technology with the traditional ARPES sample holder. Compared with the conventional heat conduction method, which can only cool down to 6K, it can achieve a stable ultra-low temperature of 1.52K. The closed cycle refers to the refrigerant. Conventional sample holders use liquid helium heat conduction refrigeration. Liquid helium, as a refrigerant, absorbs heat and vaporizes. It will be collected or discharged, but it 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] As an illustration, the material of the support truss 1 and the heavy-load lifting platform 2 is selected to be a material that does not affect the magnetic field of the sample rack 6, such as a combination of SS304 stainless steel and aluminum, the load of the support truss 1 is greater than 4t, the stroke of the heavy-load lifting platform 2 is 500-700mm, preferably 600mm, the accuracy of the heavy-load lifting platform 2 is less than 0.01mm, and the vibration amplitude of the heavy-load lifting platform 2 when lifting the sample rack 6 is less than 2μm. Therefore, the present invention can achieve the heavy load of the sample rack 6 and the high precision and high stability of the sample rack 6 when lifting, while the lifting of the sample rack 6 has a long stroke and low vibration, and the present invention will not interfere with the magnetic field of the sample rack 6.

[0118] In the heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack provided in the embodiment of the present invention, in combination with reference to 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 bottom plate 31 and a plurality of side support plates 312 arranged on the bottom plate 31. The bottom plate 31 is arranged on the truss platform 12 and is detachably connected to the truss platform 12. The bottom plate 31 and the truss platform 12 can usually be fixedly connected by bolts. A bottom plate through hole 311 is provided in the bottom plate 31. The inner cavity of the heavy-duty lifting platform 2 is connected to the multi-functional groove 13 through the bottom plate through hole 311. The main function of the bottom plate through hole 311 is to allow the sample rod of the sample rack 6 to pass through the bottom plate 31 smoothly. The radius of the bottom plate through hole 311 is usually larger than the radius of the sample rod of the sample rack 6, so as to ensure that there is a certain gap between the sample rod and the side wall of the bottom plate through hole 311. Figure 3 , Figure 4 and Figure 6 The lifting assembly 4 includes a driving member 41 and a lifting plate 42. The driving member 41 is arranged on the bottom plate 31, and also includes a plurality of driven rods 43 and a plurality of lifting rods 44. The driving shaft of the driving member 41 is respectively connected to the two driven rods 43 through two first transfer boxes 431, and each driven rod 43 is respectively connected to the two lifting rods 44 through two second transfer boxes 441; the driving shaft of the driving member 41 and the driven rods 43 are parallel to the bottom plate 31, and the lifting rods 44 are perpendicular to the bottom plate 31. The lifting plate 42 is slidably connected to each lifting rod 44, and a sample rack through hole 421 is provided in the lifting plate 42; a plurality of ears 45 are also provided on the lifting plate 42, and the ears 45 pass through the sample rack through hole 421 and extend toward the bottom plate through hole 311, and the ears 45 are used to hold the sample rack 6.

[0119] It can be understood that when the sample rack 6 needs to be raised or lowered, the driving shaft of the driving member 41 starts to rotate, and transmits the rotation to the driven rod 43 through the first adapter box 431, so that the driven rod 43 rotates synchronously, and the rotation of the driven rod 43 is transmitted to the lifting rod 44 through the second adapter box 441, so that the lifting rod 44 rotates synchronously, and the lifting plate 42 can be lifted or lowered along the lifting rod 44 while the lifting rod 44 rotates, and the lifting of the lifting plate 42 can drive the lifting of the ear 45, and the lifting of the ear 45 can directly drive the lifting of the sample rack 6, thereby completing the lifting and lowering control of the sample rack 6. Among them, the motion mode between the lifting rod 44 and the adapter block 442 can refer to the ball screw.

[0120] In a specific embodiment, the driving member 41 is preferably a servo motor, the first adapter box 431 is preferably a helical bevel gear box, and the second adapter box 441 is preferably a worm screw screw elevator. It can be understood that the servo motor is used to convert the voltage signal into torque and speed for drive control. Since the voltage signal can be accurately controlled, the speed and lifting position of the sample rack 6 can be accurately controlled. The helical bevel gear box transmits the movement and power between the two intersecting axes, and can transmit the horizontal movement output by the servo motor to other directions. In this way, the servo motor only needs to be installed at the end. The helical bevel gear box is light in weight, has a large torque transmission, and starts smoothly, so the vibration caused when it starts is small, which improves the overall stability. The worm gear screw jack is composed of multiple worm gear linear push rods to control the lifting of the extremely low temperature sample rack. The radial deep groove ball bearing on the worm shaft allows it to run at high speed and heavy load, with a maximum load of 2 tons. The aluminum casing of the worm gear screw jack is non-magnetic and relatively stable. The choice of non-magnetic material can avoid the adverse effects of magnetic fields on ARPES measurements and can be used for longer working cycles. The characteristic profile of the surface increases the overall stiffness and reduces the reduction in overall stability caused by deformation.

[0121] In the heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack provided in the embodiment of the present invention, refer to Figure 6 , Figure 3 and Figure 4 As an auxiliary reference, the lifting rod 44 is provided with a transfer block 442 slidably connected thereto, and the top of the transfer 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 transfer block 442 is slidably connected to the corresponding slide rail 313. This auxiliary lifting mode in which the transfer block 442 and the slide rail 313 cooperate can enhance the stability and safety of the sample rack 6 when it is lifted and lowered with the lifting plate 42. As an explanation, the lifting plate 42 should maintain a parallel relationship with the bottom plate 31 when it is lifted and lowered in the inner cavity of the heavy-duty lifting platform 2 to ensure the stability of the sample rack 6.

[0122] In some of these embodiments, Figure 3 and Figure 5 , Figure 4 As an auxiliary reference, the bottom 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 perpendicular to the second side support plate 312.2. In a preferred embodiment, two slide rails 313 are provided on the inner walls of the first side support plate 312.1 and the third side support plate 312.3, and the four lifting rods 44 are provided with adapter blocks 442, which are slidably connected to the matching slide rails 313.

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

[0124] Optionally, see Figure 7 and Figure 8 , Figure 3 As an auxiliary reference, the lower bottom surface of the lifting plate 42 is also provided with an auxiliary transfer block 443, and the inner wall of the second side support plate 312.2 is provided with a slide rail 313, and the auxiliary transfer 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 rack 6 when it is lifted and lowered with the lifting plate 42. Preferably, the lower bottom surface of the lifting plate 42 is provided with two auxiliary transfer blocks 443, and the inner wall of the second side support plate 312.2 is provided with two slide rails 313, and the two auxiliary transfer blocks 443 are slidably connected to the corresponding slide rails 313.

[0125] Optionally, see Figure 3 and Figure 5 , Figure 4 As an auxiliary reference, a limit plate 314 is further provided on the top of the side support plate 312. The limit plate 314 and the side support plate 312 are perpendicular to each other. The top of the lifting rod 44 is connected to the corresponding limit plate 314. When the lifting plate 42 is lifted or lowered in the inner cavity of the heavy-load lifting platform 2, the limit plate 314 can limit the top of the lifting plate 42 to prevent the lifting plate 42 from over-extending and moving. Furthermore, a limit plate hollow 314.a is further provided on the side of the limit plate 314 away from the side support plate 312. The limit plate hollow 314.a can relatively reduce the weight of the limit plate 314 to reduce the pressure of the limit plate 314 on the side support plate 312. In a feasible embodiment, refer to Figure 1A limiting plate 314 is 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 support ears 45 include 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 rack 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 rack through hole 421. Furthermore, one or more bottom support hollows are provided on the bottom support 453 to reduce the weight of the bottom support 453. As an illustration, when the sample rack 6 is installed in the inner cavity of the heavy-load lifting platform 2, the connecting plate 451 and the upper surface of the lifting plate 42 are first connected by screws, and then the bottom of the sample rack 6 is placed on the bottom support 453, and the bottom of the sample rack 6 is connected to the bottom support 453 by screws. In addition, the outer wall of the side support 452 generally does not contact the side wall of the sample rack through hole 421, and the side wall of the sample rack 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 rack 6. Figure 3 and Figure 5 Four ears 45 are provided on the lifting plate 42, and the angles between two adjacent ears 45 and the center point of the lifting plate 42 are both 90°.

[0127] Optionally, see Figure 3 , Figure 4 and Figure 5 The support ear 45 is also provided with a hook 46, and the hook 46 is used to connect with the hoisting mechanical arm when hoisting the heavy-load lifting platform 2.

[0128] In the heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack provided in the embodiment of the present invention, refer to Figure 7 , Figure 3 As an auxiliary reference, the side support plate 312 is also provided with a grating ruler 315, and the grating ruler 315 is used to read the height of the sample holder 6. Optionally, a rib plate 316 is further provided between the outer wall of each side support plate 312 and the bottom plate 31, and further, a rib plate hollow 316.a is provided in the rib plate 316 to reduce the weight of the rib plate 316.

[0129] In the heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack provided in the embodiment of the present invention, in combination with reference to Fig. 9 and Fig.10 The truss platform 12 includes a truss frame 121 and a multifunctional slot frame 131 surrounded by the truss frame 121, and the multifunctional slot 13 is surrounded by the multifunctional slot frame 131. Fig.10The truss frame 121 includes four first side bars 121.1 connected in sequence to form a rectangle, and the multifunctional slot frame 131 includes three second side bars 132 connected in sequence to form three sides of the rectangle, wherein the ends of two parallel second side bars 132 are connected to one of the first side bars 121.1, and the first side bar 121.1 is provided with a slot connected to the multifunctional slot 13, so that the multifunctional slot 13 is connected to the external space. Further, refer to Figure 1 The two parallel second side bars 132 can respectively correspond to the two parallel first side bars 121.1 in the truss frame 121, and one or more connecting rods 121.2 are provided between the corresponding first side bars 121.1 and the second side bars 132. Furthermore, the connecting rods 121.2 are vertically arranged with the first side bars 121.1 and the second side bars 132. In a preferred embodiment, two connecting rods 121.2 are provided between the corresponding first side bars 121.1 and the second side bars 132.

[0130] Optional, see Figure 1 , Figure 2 or Fig. 9 A first handrail 124 is also provided at the edge of the truss platform 12 , and the first handrail 124 can prevent the experimenter from accidentally falling from the truss platform 12 .

[0131] Optionally, see Fig.10 , Fig. 9 As an auxiliary reference, a splicing plate 133 is provided in the multifunctional slot 13, and the two ends of the splicing plate 133 are detachably connected to the two inner walls opposite to the multifunctional slot 13, respectively. The closed pedal 123 is provided above the splicing plate 133 and is detachably connected to the splicing plate 133. It can be understood that the splicing plate 133 can be installed after the heavy-duty lifting platform 2 is installed on the truss platform 12. The position of the splicing plate 133 is close to the notch of the multifunctional slot 13. On the one hand, the multifunctional slot 13 can be closed, and on the other hand, the closed pedal 123 can be supported to prevent the middle part of the closed pedal 123 from collapsing downward. In a specific embodiment, two splicing plates 133 are provided, one of which is used to close the notch of the multifunctional slot 13, and the other splicing plate 133 is located in the middle of the multifunctional slot 13 to provide support for the closed pedal 123. In a feasible embodiment, the two ends of the splicing plate 133 are against the two opposite inner walls of the multi-functional groove 13, and the upper surface of the splicing plate 133 is connected to the upper surface of the truss platform 12 through 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 through a lower adapter plate and screws.

[0132] Optionally, see Fig.10 , Fig. 9As an auxiliary reference, a support plate 134 is provided in the multifunctional slot 13, and the two ends of the support plate 134 are detachably connected to the two inner walls opposite to the multifunctional slot 13, and a vertical support 112 is provided below the support plate 134, and the top of the vertical support 112 supports the support plate 134. It can be understood that, like the splicing plate 133, the support plate 134 can be installed after the heavy-load 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 slot 13 relative to the splicing plate 133, but it cannot touch the sample rod. In a 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 , the multifunctional slot frame 131 , the connecting rod 121 . 2 , the first handrail 124 , the splicing plate 133 and the support plate are all made of SS304 stainless steel to enhance the overall rigidity of the truss platform 12 and enhance the load-bearing capacity of the truss platform 12 .

[0134] In the heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack provided in the embodiment of the present invention, refer to Fig. 9 The support frame 11 includes a plurality of heavy-duty support rods 111, and the top of each heavy-duty support rod 111 is connected to the bottom surface of the truss platform 12. In a specific embodiment, four heavy-duty support rods 111 are included, and the tops of the four heavy-duty support rods 111 respectively support the four bottom corners of the truss platform 12.

[0135] In the heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack provided in the embodiment of the present invention, refer to Fig. 9 , Figure 1 and Figure 2 As an auxiliary reference, a diagonal brace 113 is provided between the heavy-duty support rod 111 and the bottom surface of the truss platform 12, and 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 cross braces 114 are provided between two adjacent heavy-duty support rods 111, and the cross braces 114 can also improve the connection strength between the heavy-duty support rod 111 and the truss platform 12.

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

[0137] In the heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack provided in the embodiment of the present invention, refer to Figure 1, and also includes a ladder 5, which is located on one side of the truss platform 12 where the multifunctional slot 13 is provided, and the ladder 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 ladder 5 can help the experimenter climb onto the truss platform 12 to operate the sample rack 6. It should be emphasized that in order to ensure the stability of the sample rack 6, the ladder 5 does not contact the truss platform 12 to prevent the vibration of the experimenter when climbing the ladder from being transmitted to the truss platform 12 to ensure the stability of the sample rack 6.

[0138] Optionally, a universal wheel 54 and a telescopic rod 55 are provided at the bottom of the escalator 5, wherein the universal wheel 54 is used to move the escalator 5, and the telescopic rod 55 is used to support the ground when extended. Optionally, the escalator 5 includes a multi-step step 51 and an extension plate 52 located at the top of the multi-step step 51, and second handrails 53 are provided on both sides of the multi-step step 51 and the extension plate 52, and the second handrails 53 help the experimenter to climb the ladder and prevent the experimenter from accidentally falling.

[0139] The present invention also provides a method for using a heavy-duty lifting platform for a closed-cycle ultra-low temperature sample rack, comprising the following steps:

[0140] Step 1) Install the sample rack 6 in the heavy-load lifting platform 2;

[0141] Step 2) installing the heavy-load lifting platform 2 and the sample rack 6 on the truss platform 12 through the multifunctional slot 13;

[0142] Step 3) closing the multifunctional slot 13 with the splicing plate 133;

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

[0144] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A heavy-duty lifting platform for closed-cycle ultra-low temperature sample racks, characterized in that: The invention comprises a supporting truss (1) and a heavy-load lifting platform (2), wherein the supporting truss (1) comprises a supporting frame (11) and a truss platform (12) arranged on the top of the supporting frame (11), wherein the truss platform (12) is provided with a multifunctional groove (13) which is grooved toward one side of the truss platform (12); and the truss platform (12) is also provided with a supporting pedal (122) and a closing pedal (123) for closing part of the multifunctional groove (13); The heavy-load lifting platform (2) is arranged on the truss platform (12) and is detachably connected to the truss platform (12); the inner cavity of the heavy-load lifting platform (2) is used to place a sample rack and the inner cavity of the heavy-load lifting platform (2) is connected to the multifunctional groove (13); the heavy-load lifting platform (2) is used to lift the sample rack.

2. The heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack according to claim 1, characterized in that: The heavy-load lifting platform (2) comprises a fixed frame (3) and a lifting assembly (4); the fixed frame (3) comprises a bottom plate (31) and a plurality of side support plates (312) arranged on the bottom plate (31); the bottom plate (31) is arranged on the truss platform (12) and is detachably connected to the truss platform (12); a bottom plate through hole (311) is provided in the bottom plate (31); and the inner cavity of the heavy-load lifting platform (2) is connected to the multifunctional groove (13) through the bottom plate through hole (311); The lifting assembly (4) comprises a driving member (41) and a lifting plate (42); the driving member (41) is arranged on the bottom plate (31), and further comprises a plurality of driven rods (43) and a plurality of lifting rods (44); the driving shaft of the driving member (41) is respectively connected to the two driven rods (43) through two first transfer boxes (431); each driven rod (43) is respectively connected to the two lifting rods (44) through two second transfer boxes (441); The driving shaft and the driven rod (43) of the driving member (41) are parallel to the bottom plate (31), and the lifting rod (44) is perpendicular to the bottom plate (31); the lifting plate (42) is slidably connected to each lifting rod (44), and a sample rack through hole (421) is provided in the lifting plate (42); a plurality of ears (45) are also provided on the lifting plate (42), and the ears (45) pass through the sample rack through hole (421) and extend toward the bottom plate through hole (311), and the ears (45) are used to hold the sample rack.

3. The heavy-duty lifting platform for closed-cycle cryogenic sample rack according to claim 2, characterized in that: Also includes at least one of the following technical features: Technical feature a), the truss platform (12) comprises a truss frame (121) and a multifunctional slot frame (131) surrounded by the truss frame (121), and the multifunctional slot (13) is surrounded by the multifunctional slot frame (131); Technical feature b), the lifting rod (44) is provided with a transfer block (442) slidably connected thereto, and the top of the transfer 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 transfer block (442) is slidably connected to the corresponding slide rail (313); Technical feature c), the bottom 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), a first handrail (124) is further provided at the edge of the truss platform (12); Technical feature e), a limiting plate (314) is further provided on the top of the side support plate (312), and the top of the lifting rod (44) is connected to the corresponding limiting plate (314); Technical feature f), the support ear (45) is also provided with a hook (46), and the hook (46) is used to connect with the lifting mechanical arm when lifting the heavy-load lifting platform (2); Technical feature g), the support ear (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 rack through hole (421) toward the bottom plate through hole (311), and the bottom support (453) is perpendicular to the side support (452) and extends toward the center point of the sample rack through hole (421); Technical feature h), a splicing plate (133) is provided in the multifunctional groove (13), two ends of the splicing plate (133) are respectively detachably connected to two inner walls opposite to the multifunctional groove (13), and the closed pedal (123) is provided above the splicing plate (133) and is detachably connected to the splicing plate (133); Technical feature i): a support plate (134) is provided in the multifunctional groove (13), two ends of the support plate (134) are detachably connected to two inner walls opposite to the multifunctional groove (13), a vertical support (112) is provided below the support plate (134), and 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), and the grating ruler (315) is used to read the height of the sample rack; Technical feature k), a rib plate (316) is further provided between the outer side wall of the side support plate (312) and the bottom plate (31); Technical feature 1), a side support plate hollowing (312.a) is provided in the side support plate (312).

4. The heavy-duty lifting platform for closed-cycle cryogenic sample rack according to claim 3, characterized in that: It also includes at least one of the following technical features: Technical feature a1), in technical feature a), the truss frame (121) includes four first side bars (121.1) connected in sequence to form a rectangle, the multifunctional slot frame (131) includes three second side bars (132) connected in sequence to form three sides of the rectangle, wherein the ends of two parallel second side bars (132) are connected to one of the first side bars (121.1), and the first side bar (121.1) is provided with a slot connected to the multifunctional slot (13), and one or more connecting bars (121.2) are further provided between the corresponding first side bars (121.1) and the second side bars (132); Technical feature a2), in technical feature a), the material of the truss frame (121) and the multifunctional slot frame (131) is SS304 stainless steel; Technical feature c1), in technical feature c), the lower bottom surface of the lifting plate (42) is further provided with an auxiliary transfer block (443), the inner wall of the second side support plate (312.2) is provided with a slide rail (313), and the auxiliary transfer block (443) is slidably connected to the slide rail (313) on the second side support plate (312.2); 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), a side of the limiting plate (314) away from the side support plate (312) is further provided with a limiting plate hollowing (314.a); Technical feature h1), in the technical feature h), the material of the splicing plate (133) is SS304 stainless steel; Technical feature i1), in technical feature i), the support plate (134) is made of SS304 stainless steel; Technical feature i2), in technical feature i), the material of the support (112) is aluminum; Technical feature k1): In technical feature k), the rib (316) is further provided with rib hollowing (316.a).

5. The heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack according to claim 1, characterized in that: The support frame (11) comprises a plurality of heavy-load support rods (111), and the top of each of the heavy-load support rods (111) is 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.

6. The heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack according to claim 5, characterized in that: A diagonal brace (113) is provided between the heavy-load support rod (111) and the bottom surface of the truss platform (12); and / or one or more cross braces (114) are provided between two adjacent heavy-load support rods (111); and / or the heavy-load support rod (111) is made of SS304 stainless steel.

7. The heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack according to claim 1, characterized in that: It also comprises an escalator (5), wherein the escalator (5) is located on one side of the truss platform (12) where the multifunctional groove (13) is provided, and the escalator (5) is not in contact with the truss platform (12).

8. The heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack according to claim 7, characterized in that: The bottom of the escalator (5) is provided with a universal wheel (54) and a telescopic rod (55), and the telescopic rod (55) is used to support the ground when extended; and / or, the escalator (5) includes a plurality of steps (51) and an extension plate (52) located at the top of the plurality of steps (51), and second handrails (53) are provided on both sides of the plurality of steps (51) and the extension plate (52).

9. The heavy-duty lifting platform for closed-cycle ultra-low temperature sample rack according to claim 1, characterized in that: The load of the supporting truss (1) is greater than 4t; and / or the stroke of the heavy-load lifting platform (2) is 500-700mm; and / or the accuracy of the heavy-load lifting platform (2) is less than 0.01mm; and / or the vibration amplitude of the heavy-load lifting platform (2) when lifting the sample rack is less than 2μm.

10. A method for using the heavy-duty lifting platform for a closed-cycle ultra-low temperature sample rack according to any one of claims 1 to 9, comprising the following steps: Step 1) installing the sample rack in a heavy-load lifting platform (2); Step 2) installing the heavy-load lifting platform (2) and the sample rack on the truss platform (12) through the multifunctional slot (13); Step 3) closing the multifunctional slot (13) with a splicing plate (133); Step 4) Install the closed pedal (123) onto the truss platform (12).

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