Rapid self-calibration structure

Abstract

The utility model relates to the technical field of laboratory instruments and equipment, in particular to a rapid self-calibration structure which comprises an upper sealing assembly, a lower sealing assembly, a guide mechanism, a heating assembly and a driving mechanism. The guide mechanism enables the upper sealing assembly and the lower sealing assembly to be connected and slide relatively; the heating assembly is slidably connected with the guide mechanism; the heating assembly comprises a heating block and two guide rail assemblies. The heating block is provided with a heating cavity with the upper end and the lower end communicated. The guide rail assembly connects the heating block with the guide mechanism, a first magnetic attraction piece is fixedly arranged on the fixed side of the guide rail assembly, and a second magnetic attraction piece corresponding to the first magnetic attraction piece is arranged on the sliding side of the guide rail assembly. The upper end and the lower end of the heating cavity are respectively aligned with sealing shafts of the upper sealing assembly and the lower sealing assembly; and the driving mechanism is used for driving the upper sealing assembly to slide up and down. The heating device has the advantage that the heating block is easy to position through the first magnetic attraction piece and the second magnetic attraction piece on the guide rail assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory instrument equipment, in particular to a rapid self-calibration structure. Background Technique

[0002] In a heating module of a laboratory instrument, a sealing component is provided above and below the heating component. The sealing component can move up and down. After the sealing component is aligned with the heating cavity on the heating component, by moving the sealing component up and down, the sealing component plugs the upper and lower ends of the heating cavity to seal the upper and lower ends of the heating cavity. After the heating cavity is sealed, the heating operation can be carried out.

[0003] When the heating component is not performing the heating operation, it can move horizontally. Therefore, after the heating component moves horizontally, the position of the heating cavity is likely to deviate from that of the sealing component and become misaligned, resulting in poor sealing during the heating process and easy leakage of the object to be heated. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a rapid self-calibration structure.

[0005] The purpose of the utility model is realized by the following technical solutions: A rapid self-calibration structure, comprising:

[0006] An upper sealing component and a lower sealing component, and sealing shafts are provided at the bottom of the upper sealing component and the top of the lower sealing component;

[0007] A guiding mechanism, which includes a sleeve and a guiding rod. Two sleeves are provided at both ends of the top of the lower sealing component, and two guiding rods are vertically provided at both ends of the bottom of the upper sealing component. The two guiding rods respectively slide through the two sleeves;

[0008] A heating component, which is located between the upper sealing component and the lower sealing component. The heating component includes a heating block and two guide rail components arranged in parallel in the horizontal direction. A heating cavity penetrating through the upper and lower ends is provided on the heating block; the sliding sides of the two guide rail components are respectively connected to both ends of the heating block, and the fixed sides of the two guide rail components are respectively slidably connected to the two guiding rods in the vertical direction. A first magnetic attracting member is fixedly provided on the fixed side of the guide rail component, and a second magnetic attracting member is provided corresponding to the first magnetic attracting member on the sliding side of the guide rail component. When the first magnetic attracting member adsorbs the second magnetic attracting member, the upper and lower ends of the heating cavity are respectively aligned with the sealing shafts of the upper sealing component and the lower sealing component;

[0009] A driving mechanism, which is connected to the upper sealing component and is used to drive the upper sealing component to move vertically so that the upper sealing shaft and the lower sealing shaft are inserted into the heating cavity to seal the heating cavity.

[0010] In the present utility model, by providing a first magnetic attraction member and a second magnetic attraction member on the guide rail assembly, the heating block can be automatically positioned when it returns to the heating position after moving horizontally, so that the heating cavity on the heating block is aligned with the sealing shaft on the sealing assembly. After the heating cavity is aligned with the sealing shaft, the upper sealing assembly is driven to move by a driving mechanism, so that the sealing shaft on the upper sealing assembly is inserted into the top end of the heating cavity. At the same time, due to the pressing of the upper sealing assembly, the sealing shaft of the lower sealing assembly is inserted into the bottom end of the heating cavity, so that both the top end and the bottom end of the heating cavity are sealed. At this time, the heating operation can be started.

[0011] In some embodiments, the lower sealing assembly includes a lower sealing seat, a floating connecting plate assembly and a sealing shaft connected in sequence from bottom to top; the two sleeves are respectively arranged at both ends of the top of the lower sealing seat.

[0012] In some embodiments, the upper sealing assembly includes an upper sealing seat, a floating connecting plate assembly and a sealing shaft connected in sequence from top to bottom, and the two guide rods are respectively arranged vertically at both ends of the bottom of the upper sealing seat.

[0013] In some embodiments, the floating connecting plate assembly includes a mounting substrate, an intermediate plate and a limiting plate. The intermediate plate is clamped between the mounting substrate and the limiting plate. A receiving hole for receiving the end of the sealing shaft is provided on the intermediate plate. An opening is provided on the limiting plate corresponding to the receiving hole. The diameters of the receiving hole and the opening are both larger than the diameter of the sealing shaft. The sealing shaft penetrates through the opening. A circlip is provided at one end of the sealing shaft located in the opening. The diameter of the opening is smaller than the diameter of the circlip to limit the end of the sealing shaft in the opening. In the present utility model, by setting the diameters of the receiving hole and the opening to be larger than the diameter of the sealing shaft, the sealing shaft can have a certain moving space in the receiving hole, and during the process of inserting the sealing shaft into the heating cavity, the sealing shaft has a moving space in the horizontal direction, so that the sealing shaft can automatically adjust its position, further improving the sealing performance.

[0014] In some embodiments, the floating connecting plate assembly further includes an elastic member. The elastic member is arranged in the receiving hole and its two ends respectively abut against the mounting substrate and the sealing shaft. The elastic member provides axial elastic force for the sealing shaft and provides continuous elastic force after the sealing shaft is inserted into the heating cavity, further improving the sealing performance.

[0015] In some embodiments, a lip seal is provided at one end of the sealing shaft away from the floating connecting plate assembly. After the sealing shaft is inserted into the heating cavity, the lip seal provides better sealing performance.

[0016] In some embodiments, a limiting structure is provided on the guiding rod, and the limiting structure is used to limit the stroke length of the guide rail assembly when sliding vertically on the guiding rod. The limiting structure is used to lift the heating block away from the lower sealing assembly when the upper sealing assembly rises away from the heating block.

[0017] In some embodiments, the limiting structure includes a milled plane section arranged along the axial direction of the guiding rod on the guiding rod, and the fixed side of the guide rail assembly is slidably connected to the milled plane section. Through the milled plane section, the guide rail assembly is limited to slide within the range of the milled plane section. When the upper sealing assembly rises and leaves the heating block and then continues to rise, the guide rail assembly is lifted by the lower end of the milled plane section, and then the heating block is lifted away from the lower sealing assembly.

[0018] In some embodiments, the driving mechanism includes a driving motor set, a belt transmission mechanism, a lead screw, and a lead screw nut. Both of the two guiding rods have a hollow structure inside, and lead screws are coaxially arranged inside both of the two guiding rods. The bottom of the lead screw is rotatably connected to the lower sealing assembly, the lead screw is threadedly connected to the lead screw nut, the lead screw nut is arranged on the upper sealing assembly, the top end of the lead screw penetrates through the upper sealing assembly, and the driving motor set is drivingly connected to the top end of the lead screw through the belt transmission mechanism. Through the driving mechanism, the upper sealing assembly and the heating block are driven to move up and down.

[0019] In some embodiments, the guide rail assembly includes a guide rail and a guide wheel component; one side of the guide wheel component is slidably connected to the guiding rod vertically, and a plurality of guide wheels are arranged in a horizontal row on the other side;

[0020] The guide rail is arranged horizontally at both ends of the heating block, the guide wheels are in rolling connection with the guide rail; the first magnetic attraction member is arranged on the guide wheel component, and the second magnetic attraction member is arranged on the guide rail. Through the guide rail and the guide wheel component, the heating block can move horizontally.

[0021] The utility model has the following advantages:

[0022] 1. Through the guide rail assembly of the utility model, the heating block can move horizontally. When the heating block returns to its original position after moving horizontally, the first magnetic attraction member and the second magnetic attraction member are used to accurately reset the heating block, so that the heating cavity on the heating block is aligned with the sealing shafts on the upper sealing assembly and the lower sealing assembly, and the sealing performance is better when the sealing shafts are inserted into the heating cavity.

[0023] 2. By providing a floating connecting plate assembly, accommodation holes and openings are provided on the intermediate plate and the limiting plate in the floating connecting plate assembly, and the diameters of the accommodation holes and the openings are larger than the diameter of the sealing shaft, so that the sealing shaft has a space for horizontal movement. During the process of inserting the sealing shaft into the heating cavity, the sealing shaft that is not aligned with the heating cavity automatically shifts and aligns with the heating cavity. Brief Description of the Drawings

[0024] Figure 1 is a schematic diagram of the overall structure of the fast self - calibration structure of the present utility model;

[0025] Figure 2 is Figure 1 the enlarged view of A in

[0026] Figure 3 is a schematic diagram of the floating link plate assembly and the sealing shaft in the upper sealing assembly of the present utility model;

[0027] Figure 4 is a sectional schematic diagram of the floating link plate assembly and the sealing shaft in the upper sealing assembly of the present utility model;

[0028] Figure 5 is Figure 4 the enlarged view of B in

[0029] Figure 6 is a schematic diagram of the floating link plate assembly and the sealing shaft in the lower sealing assembly of the present utility model;

[0030] Figure 7 is a schematic diagram of the heating block of the present utility model;

[0031] In the figure: 11, upper sealing seat; 12, lower sealing seat; 21, guide rod; 22, sleeve; 3, floating link plate assembly; 31, mounting substrate; 32, intermediate plate; 321, accommodation hole; 33, limiting plate; 331, opening; 34, elastic member; 4, sealing shaft; 41, circlip; 42, lip seal; 5, heating block; 51, heating cavity; 6, guide rail assembly; 61, guide wheel component; 611, first magnetic attracting member; 62, guide rail; 621, second magnetic attracting member; 71, drive motor set; 72, belt drive mechanism; 721, belt pulley; 722, synchronous belt; 73, lead screw. Detailed Description of the Preferred Embodiments

[0032] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model, and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0033] The following further describes the present utility model with reference to the drawings, but the protection scope of the present utility model is not limited to the following.

[0034] Such as Figures 1-7As shown, a fast self-calibration structure includes:

[0035] An upper sealing assembly and a lower sealing assembly, with a sealing shaft 4 provided at the bottom of the upper sealing assembly and the top of the lower sealing assembly;

[0036] A guiding mechanism, which includes a sleeve 22 and a guiding rod 21. Two of the sleeves 22 are provided at both ends of the top of the lower sealing assembly, and two of the guiding rods 21 are vertically provided at both ends of the bottom of the upper sealing assembly. The two guiding rods 21 respectively slide through the two sleeves 22;

[0037] A heating assembly, which is located between the upper sealing assembly and the lower sealing assembly. The heating assembly includes a heating block 5 and two rail assemblies 6 arranged in parallel in the horizontal direction. The heating block 5 is provided with a heating cavity 51 that penetrates through the upper and lower ends; the sliding sides of the two rail assemblies 6 are respectively connected to both ends of the heating block 5, and the fixed sides of the two rail assemblies 6 are respectively slidably connected to the two guiding rods 21 in the vertical direction. A first magnetic attraction member 611 is fixedly provided on the fixed side of the rail assembly 6, and a second magnetic attraction member 621 is provided corresponding to the first magnetic attraction member 611 on the sliding side of the rail assembly 6. When the first magnetic attraction member 611 adsorbs to the second magnetic attraction member 621, the upper and lower ends of the heating cavity 51 are respectively aligned with the sealing shafts 4 of the upper sealing assembly and the lower sealing assembly;

[0038] A driving mechanism, which is connected to the upper sealing assembly and is used to drive the upper sealing assembly to move vertically so that the upper sealing shaft 4 and the lower sealing shaft 4 are inserted into the heating cavity 51 to seal the heating cavity 51.

[0039] Specifically, in this embodiment, the sealing shaft 4 in the upper sealing assembly is arranged downward, the sealing shaft 4 in the lower sealing assembly is arranged upward, and several sealing shafts 4 are provided on both the upper sealing assembly and the lower sealing assembly; the lower sealing assembly is fixedly arranged on the installation base, the upper sealing assembly can move up and down through the guidance of the guiding mechanism, and the upper sealing assembly realizes up and down movement through the drive of the driving mechanism. The driving mechanism is fixedly arranged on the installation base;

[0040] The guide rail assembly 6 is horizontally arranged, and the fixed side of the guide rail assembly 6 is vertically slidably connected to the guide rod 21, so that the heating block 5 can horizontally move by using the guide rail assembly 6 and can also vertically move along the guide rod 21. In this embodiment, a plurality of heating cavities 51 are vertically arranged on the heating block 5. The heating cavities 51 are columnar, and the upper and lower ends of the heating cavities 51 penetrate through the heating block 5. Before heating, the upper sealing assembly is driven by a driving mechanism to move downward, so that the sealing shaft 4 on the upper sealing assembly is inserted into the upper end of the heating cavity 51. At the same time, since the heating block 5 can move up and down along the guide rod 21 through the guide rail assembly 6, when the sealing shaft 4 on the upper sealing assembly abuts against the heating cavity 51, the heating block 5 is pressed downward against the lower sealing assembly, so that the sealing shaft 4 on the lower sealing assembly is inserted into the heating cavity 51, and both the upper and lower ends of the heating cavity 51 are sealed. At this time, heating can be started.

[0041] Since the operator needs to pull out the heating block 5 horizontally along the guide rail assembly 6 before or after heating, therefore, after the heating block 5 is reset, the position of the heating block 5 may be offset. In this regard, the present utility model sets a first magnetic attracting member 611 and a second magnetic attracting member 621 on the guide rail assembly 6. When the heating block 5 is reset, when the heating block 5 horizontally moves until the heating cavity 51 is aligned with the sealing shaft 4, the first magnetic attracting member 611 and the second magnetic attracting member 621 are closest and reach the state of maximum magnetic force, and the first magnetic attracting member 611 and the second magnetic attracting member 621 play an auxiliary positioning role for the heating block 5.

[0042] Preferably, the lower sealing assembly includes a lower sealing seat 12, a floating link plate assembly 3 and a sealing shaft 4 connected in sequence from bottom to top; two sleeves 22 are respectively arranged at both ends of the top of the lower sealing seat 12.

[0043] Preferably, the upper sealing assembly includes an upper sealing seat 11, a floating link plate assembly 3 and a sealing shaft 4 connected in sequence from top to bottom, and two guide rods 21 are respectively vertically arranged at both ends of the bottom of the upper sealing seat 11.

[0044] Preferably, the floating link plate assembly 3 includes a mounting substrate 31, an intermediate plate 32 and a limiting plate 33. The intermediate plate 32 is clamped between the mounting substrate 31 and the limiting plate 33. A receiving hole 321 for receiving the end of the sealing shaft 4 is provided on the intermediate plate 32. An opening 331 corresponding to the receiving hole 321 is provided on the limiting plate 33. The diameters of the receiving hole 321 and the opening 331 are both larger than the diameter of the sealing shaft 4. The sealing shaft 4 penetrates through the opening 331. A snap ring 41 is provided at one end of the sealing shaft 4 located in the opening 331. The diameter of the opening 331 is smaller than the diameter of the snap ring 41 to limit the end of the sealing shaft 4 in the opening 331.

[0045] Specifically, in this embodiment, the mounting substrate 31, the intermediate plate 32, and the limiting plate 33 are connected by bolts. The mounting substrate 31 is connected to the upper sealing seat 11 and the lower sealing seat 12 by bolts. On the side of the limiting plate 33 facing the intermediate plate 32, a step is provided around the opening 331. A gap is formed between the step and the intermediate plate 32 for accommodating the circlip 41. By setting the diameter of the opening 331 and the diameter of the accommodating hole 321 to be larger than the diameter of the sealing shaft 4, there is a gap for the sealing shaft 4 to move relative to the floating connecting plate assembly 3 in the horizontal direction. When the sealing shaft 4 is inserted into the heating cavity 51, the sealing shaft 4 that is not aligned with the heating cavity 51 can be automatically aligned with the heating cavity 51 after being stressed, avoiding poor sealing caused by the situation where the first magnetic attraction member 611 and the second magnetic attraction member 621 do not align the heating cavity 51 with the sealing shaft 4, and further improving the sealing performance.

[0046] Preferably, the floating connecting plate assembly 3 further includes an elastic member 34. The elastic member 34 is disposed in the accommodating hole 321 and its two ends respectively abut against the mounting substrate 31 and the sealing shaft 4. In this embodiment, the elastic member 34 is a wave washer. In some other embodiments, the elastic member 34 can also be a spring or rubber, etc. Through the elastic member 34, after the sealing shaft 4 is inserted into the heating cavity 51, the elastic member 34 continuously provides elastic force for the sealing shaft 4, making the connection between the sealing shaft 4 and the heating cavity 51 tight and improving the sealing performance.

[0047] Preferably, a lip seal 42 is provided at one end of the sealing shaft 4 away from the floating connecting plate assembly 3. The lip seal 42 further improves the sealing performance between the sealing shaft 4 and the heating cavity 51.

[0048] Preferably, a limiting structure is provided on the guide rod 21 for limiting the stroke length when the guide rail assembly 6 slides vertically on the guide rod 21.

[0049] In this embodiment, since the heating block 5 needs to move horizontally and to ensure that the heating block 5 can be separated from the lower sealing assembly as the guide rod 21 rises, a limiting structure is provided to limit the up and down sliding of the guide rail assembly 6.

[0050] Preferably, the limiting structure includes a milled plane section provided on the guide rod 21 along the axial direction of the guide rod 21, and the fixed side of the guide rail assembly 6 is slidably connected to the milled plane section.

[0051] In the present utility model, the milled plane section at least includes one milled plane provided along the axial direction of the guide rod 21. Specifically, in this embodiment, a total of four milled planes are provided on the milled plane section so that the cross-section of the milled plane section is square. In some other embodiments, the cross-sectional shape of the milled plane section can also be polygonal or semi-circular. The stroke length of the guide rail assembly 6 sliding up and down along the guide rod 21 is limited by the milled plane section.

[0052] In the unheated state, the guide rail assembly 6 is located at the bottommost end of the milled plane section under the action of gravity and is limited by the end face of the milled plane. When the driving mechanism drives the upper sealing assembly to move downward to seal the heating cavity 51, the guide rod 21 starts to move downward. The guide rod 21 enters the sleeve 22, and the heating block 5 follows the guide rod 21 to move downward through the guide rail assembly 6. After the sealing shaft 4 on the lower sealing assembly is inserted into the heating cavity 51, the heating block 5 stops moving downward, and the guide rod 21 continues to move downward until the sealing shaft 4 on the upper sealing assembly is inserted into the heating cavity 51. At this time, the driving mechanism continues to drive the upper sealing assembly to move downward, so that the sealing shafts 4 on the upper sealing assembly and the lower sealing assembly are both tightly connected to the heating cavity 51.

[0053] Preferably, the driving mechanism includes a driving motor group 71, a belt transmission mechanism 72, a lead screw 73 and a lead screw nut. Both of the two guide rods 21 have a hollow structure inside, and a lead screw 73 is coaxially arranged inside both of the two guide rods 21. The bottom of the lead screw 73 is rotatably connected to the lower sealing assembly. The lead screw 73 is threadedly connected to the lead screw nut. The lead screw nut is arranged on the upper sealing assembly. The top end of the lead screw 73 penetrates through the upper sealing assembly, and the driving motor group 71 is drivingly connected to the top end of the lead screw 73 through the belt transmission mechanism 72.

[0054] Specifically, in this embodiment, the driving motor group 71 is fixedly arranged on the installation base. The belt transmission mechanism 72 includes a belt pulley 721 and a synchronous belt 722. A belt pulley 721 is arranged on the power output end of the driving motor group 71, and a belt pulley 721 is arranged at the top end of the lead screw 73. The belt pulley 721 on the driving motor group 71 and the belt pulley 721 at the top end of the lead screw 73 are drivingly connected through the synchronous belt 722. The lead screw 73 is arranged in the inner cavity of the guide rod 21 and is coaxial with the guide rod 21. The lead screw nut is arranged in the upper sealing seat 11. The bottom end of the lead screw 73 is rotatably connected to the lower sealing seat 12. The lead screw 73 is threadedly connected to the lead screw nut. The driving motor drives the lead screw 73 to rotate through the belt transmission mechanism 72. The rotation of the lead screw 73 drives the lead screw nut to move in the vertical direction, thereby driving the upper sealing seat 11 to move up and down along the guide rod 21.

[0055] Preferably, the guide rail assembly 6 includes a guide rail 62 and a guide wheel component 61; one side of the guide wheel component 61 is vertically slidably connected to the guide rod 21, and a plurality of guide wheels are arranged in a horizontal row on the other side.

[0056] The guide rail 62 is horizontally arranged at both ends of the heating block 5, and the guide wheel is in rolling connection with the guide rail 62; the first magnetic attraction member 611 is arranged on the guide wheel component 61, and the second magnetic attraction member 621 is arranged on the guide rail 62. In this embodiment, the guide rail 62 is the sliding side of the guide rail assembly 6, and the guide wheel component 61 is the fixed side of the guide rail assembly 6. The heating block 5 realizes horizontal movement through the guide rail assembly 6.

[0057] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present invention. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technical solution of the present invention without departing from the content of the technical solution of the present invention all fall within the protection scope of this technical solution.

Claims

1. A fast self-calibration structure, characterized in that, Including: An upper sealing assembly and a lower sealing assembly, with a sealing shaft (4) provided at the bottom of the upper sealing assembly and the top of the lower sealing assembly; A guiding mechanism, which includes a sleeve (22) and a guiding rod (21). Two said sleeves (22) are arranged at both ends of the top of the lower sealing assembly, and two said guiding rods (21) are vertically arranged at both ends of the bottom of the upper sealing assembly. The two said guiding rods (21) respectively slide through the two said sleeves (22); A heating assembly, which is located between the upper sealing assembly and the lower sealing assembly. The heating assembly includes a heating block (5) and two rail assemblies (6) arranged in parallel in the horizontal direction. A heating cavity (51) that penetrates through the upper and lower ends is provided on the heating block (5). The sliding sides of the two rail assemblies (6) are respectively connected to both ends of the heating block (5), and the fixed sides of the two rail assemblies (6) are respectively slidably connected to the two said guiding rods (21) in the vertical direction. A first magnetic attraction member (611) is fixedly provided on the fixed side of the rail assembly (6), and a second magnetic attraction member (621) is provided corresponding to the first magnetic attraction member (611) on the sliding side of the rail assembly (6). When the first magnetic attraction member (611) adsorbs to the second magnetic attraction member (621), the upper and lower ends of the heating cavity (51) are respectively aligned with the sealing shafts (4) of the upper sealing assembly and the lower sealing assembly; A driving mechanism, which is connected to the upper sealing assembly and is used to drive the upper sealing assembly to move vertically so that the upper sealing shaft (4) and the lower sealing shaft (4) are inserted into the heating cavity (51) to seal the heating cavity (51).

2. The quick self-calibration structure according to claim 1, wherein The lower sealing assembly includes a lower sealing seat (12), a floating connecting plate assembly (3), and a sealing shaft (4) connected in sequence from bottom to top; the two said sleeves (22) are respectively arranged at both ends of the top of the lower sealing seat (12).

3. The quick self-calibration structure according to claim 2, wherein The upper sealing assembly includes an upper sealing seat (11), a floating connecting plate assembly (3), and a sealing shaft (4) connected in sequence from top to bottom. The two said guiding rods (21) are respectively vertically arranged at both ends of the bottom of the upper sealing seat (11).

4. A fast self-calibration structure according to claim 3, characterized in that The floating connecting plate assembly (3) includes a mounting substrate (31), an intermediate plate (32), and a limiting plate (33). The intermediate plate (32) is clamped between the mounting substrate (31) and the limiting plate (33). A receiving hole (321) for receiving the end of the sealing shaft (4) is provided on the intermediate plate (32). An opening (331) corresponding to the receiving hole (321) is provided on the limiting plate (33). The diameters of both the receiving hole (321) and the opening (331) are larger than the diameter of the sealing shaft (4). The sealing shaft (4) penetrates through the opening (331), and a snap ring (41) is provided at one end of the sealing shaft (4) located within the opening (331). The diameter of the opening (331) is smaller than the diameter of the snap ring (41) to limit the end of the sealing shaft (4) within the opening (331).

5. A fast self-calibration structure according to claim 4, characterized in that, The floating connecting plate assembly (3) further includes an elastic member (34), and the elastic member (34) is disposed in the accommodation hole (321) and its two ends respectively abut against the mounting substrate (31) and the sealing shaft (4).

6. The quick self-calibration structure according to claim 2, characterized in that, A lip seal (42) is provided at one end of the sealing shaft (4) away from the floating connecting plate assembly (3).

7. A fast self-calibration structure according to claim 1, characterized in that A limiting structure is provided on the guide rod (21), and the limiting structure is used to limit the stroke length when the guide rail assembly (6) slides vertically on the guide rod (21).

8. A fast self-calibration structure according to claim 7, characterized in that, The limiting structure includes a milled plane section provided on the guide rod (21) along the axial direction of the guide rod (21), and the fixed side of the guide rail assembly (6) is slidably connected to the milled plane section.

9. A fast self-calibration structure according to claim 1, characterized in that The driving mechanism includes a driving motor set (71), a belt transmission mechanism (72), a lead screw (73) and a lead screw nut. The interiors of the two guide rods (21) are both hollow structures, and lead screws (73) are coaxially disposed inside the two guide rods (21). The bottom of the lead screw (73) is rotatably connected to the lower sealing assembly, the lead screw (73) is threadedly connected to the lead screw nut, the lead screw nut is disposed on the upper sealing assembly, the top end of the lead screw (73) penetrates through the upper sealing assembly, and the driving motor set (71) is drivingly connected to the top end of the lead screw (73) through the belt transmission mechanism (72).

10. A fast self-calibration structure according to claim 1, characterized in that, The guide rail assembly (6) includes a guide rail (62) and a guide wheel component (61); one side of the guide wheel component (61) is slidably connected to the guide rod (21) vertically, and a plurality of guide wheels are arranged in a horizontal row on the other side. The guide rail (62) is horizontally disposed at both ends of the heating block (5), and the guide wheels are in rolling connection with the guide rail (62); a first magnetic attraction member (611) is disposed on the guide wheel component (61), and a second magnetic attraction member (621) is disposed on the guide rail (62).

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