Heating, melting and pipetting device

Abstract

The invention relates to the technical field of heating, fusing and pipetting devices, in particular to a heating, fusing and pipetting device. The heat insulation pressing assembly is arranged at one end of the sample heating assembly, a heating cavity is formed in the end, close to the heat insulation pressing assembly, of the sample heating assembly, the output end of the heat insulation pressing assembly is matched with the shape of the heating cavity, and the heat insulation pressing assembly is in sliding connection with the heating cavity; the injection needle is arranged at one end, far away from the heat insulation pressing assembly, of the sample heating assembly; in the device, the heat insulation pressing assembly prevents heat conduction and protects safety, and the sample heating assembly ensures that a sample is uniformly heated; the device integrates heating and pipetting functions, simplifies operation, and is suitable for various experiment scenes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating and melting liquid transfer devices, in particular to a heating and melting liquid transfer device. BACKGROUND

[0002] In the technical field of heating and melting liquid transfer devices, the existing devices have obvious design defects and functional limitations, and it is difficult to meet the requirements of precision and efficiency of sample processing. Most devices do not realize the integrated design of heat insulation and pressing function, and the pressing assembly is directly in contact with the heating component, so the heat is easily conducted to the operating end, which not only has the risk of burning the hands of the operator, but also causes the temperature of the heating cavity to fluctuate due to heat loss, affecting the uniformity of sample melting and the precision of liquid transfer.

[0003] In terms of structural adaptability, the sliding connection design of some existing molten liquid heating cavities and pressing assemblies is unreasonable. When the gap is too large, the heat leakage is intensified, which makes it difficult to stably control the temperature of the sample, especially for biochemical samples that need to be precisely controlled. A small gap can easily cause jamming, not only reducing the smoothness of operation, but also possibly causing debris pollution of the sample due to component friction. SUMMARY

[0004] The solution to the technical problem of the present application is a heating and melting liquid transfer device, comprising a heat insulation and pressing assembly, a sample heating assembly and an injection needle. The heat insulation and pressing assembly is arranged on one end of the sample heating assembly, the sample heating assembly is provided with a heating cavity at one end close to the heat insulation and pressing assembly, the output end of the heat insulation and pressing assembly is adapted to the shape of the heating cavity, and the heat insulation and pressing assembly is in sliding connection with the heating cavity. The injection needle is arranged on one end of the sample heating assembly away from the heat insulation and pressing assembly.

[0005] Further, the heat insulation and pressing assembly comprises a first housing unit and a heat insulation and pressing unit; the sample heating assembly comprises a sample heating crucible and a second housing unit; the first housing unit and the second housing unit are fixedly connected; a first sliding groove and a first cavity are formed in the first housing unit, and the first sliding groove is located beside the first cavity; a second cavity is formed in the second housing unit, the first sliding groove is in communication with the first cavity, and the first cavity is in communication with the second cavity; the heat insulation and pressing unit is arranged in the first sliding groove, and the heat insulation and pressing unit is in sliding connection with the first sliding groove; the output end of the heat insulation and pressing unit extends to the heating cavity from the first cavity; the sample heating crucible is connected with the second cavity; the heating cavity is arranged on the sample heating crucible, and the other end of the heat insulation and pressing unit is in sliding connection with the heating cavity; the injection needle is arranged on the output end of the sample heating crucible away from the heat insulation and pressing unit.

[0006] Further, the heat insulation pressing unit comprises a heat insulation pressing structure, a first piston and a first spring; one end of the heat insulation pressing structure is arranged on the first sliding groove, and the other end of the heat insulation pressing structure is arranged in the first cavity; one end of the first piston is connected with the heat insulation pressing structure; the other end of the first piston is slidably connected with the heating cavity; the heat insulation pressing structure is used for pushing the first piston to move in the depth direction of the heating cavity; the first spring is arranged around the first piston, and the first spring is located between the heat insulation pressing structure and the sample heating crucible.

[0007] Further, the heat insulation pressing structure comprises a heat insulation pressing piece, a second spring, a guide piece and a guide rod; the heat insulation pressing piece is arranged on the first sliding groove and slidably connected with the first sliding groove; the guide piece and the guide rod are arranged on the first cavity; a guide hole is arranged on the guide piece; the guide rod is slidably connected with the guide hole; one end of the guide rod is fixedly connected with the heat insulation pressing piece; a first clamping hole matched with the first piston is arranged on the other end of the guide rod; the first clamping hole is clamped with one end of the first piston; the second spring is arranged around one end of the guide rod and located between the heat insulation pressing piece and the guide piece.

[0008] Further, the guide piece comprises a guide sleeve and a fixing ring cover; the guide sleeve and the fixing ring cover are arranged on the first cavity; the fixing ring cover is located beside the guide sleeve and used for fixing the guide sleeve; the guide hole is arranged on the guide sleeve.

[0009] Further, the sample heating crucible comprises a crucible body and a heating structure; the heating structure is matched with the shape of the second cavity; the heating structure is clamped with the second cavity; a second clamping hole matched with the shape of the crucible body is arranged on the heating structure; the crucible body is clamped with the second clamping hole; the injection needle is arranged on one end of the crucible body away from the heat insulation pressing unit; the heating cavity is arranged on the crucible body.

[0010] Further, one end of the crucible body is an output interface matched with the shape of the injection needle; the injection needle is at least partially arranged in the output interface.

[0011] Further, the heating structure comprises a heating ring and a heating ring fixing piece; the heating ring is matched with the shape of the second cavity; the heating ring is clamped with the second cavity; a third clamping hole matched with the shape of the heating ring fixing piece is arranged on the heating ring; the heating ring fixing piece is clamped with the third clamping hole; the second clamping hole is arranged on the heating ring fixing piece.

[0012] Further, the heat insulation pressing piece comprises a spring block and a pressing handle, the pressing handle is arranged on the spring block; the spring block is arranged on the first sliding groove, and the spring block is in sliding connection with the first sliding groove.

[0013] Further, the first shell unit comprises an end cover, a gripping shell, a mounting outer shell, a heat insulation outer shell, a guide outer shell and an isolation outer shell which are sequentially connected; the first sliding groove is located on the end cover and the gripping shell; the first cavity is located on the mounting outer shell, the heat insulation outer shell, the guide outer shell and the isolation outer shell; the isolation outer shell is fixedly connected with the second shell.

[0014] The beneficial effects of the present application are: the heat insulation pressing assembly can effectively block the conduction of heat from the heating cavity to the operation end, reduce the risk of hand scalding for the operator, and build a strong safety line for experimental operation; the sample heating assembly is designed by adapting to the heating cavity of the heat insulation pressing assembly, which can ensure uniform heating and stable temperature of the sample, reduce experimental deviation caused by unstable heating, and help improve the accuracy of experimental results; at the same time, the sliding connection design of the heat insulation pressing assembly and the heating cavity makes the sample transfer process stable and controllable, which not only reduces sample residue but also reduces transfer error, and ensures the precision of pipetting; the injection needle is arranged at the output end of the sample heating assembly away from the heat insulation pressing assembly, which further optimizes the sample transfer path, integrates the functions of heating and pipetting in the overall device, simplifies the operation process, adapts to various experimental scenarios, and comprehensively improves the safety, accuracy and efficiency of experimental operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is the overall structure schematic diagram of the heating and melting pipetting device of the present application; Fig. 2 is the sectional view of the heating and melting pipetting device of the present application; Fig. 3 is the sectional view of the first sliding groove, the first cavity and the second cavity in the heating and melting pipetting device of the present application.

[0016] Fig. 1 is a heat insulation pressing assembly; 11 is a first shell unit; 12 is a heat insulation pressing unit; 13 is a heat insulation pressing structure; 14 is a first piston; 15 is a first spring; 16 is a spring block; 17 is a pressing handle; 2 is a sample heating assembly; 21 is a second shell unit; 22 is a crucible main body; 3 is an injection needle; 4 is a heating cavity; 5 is a second spring; 6 is a guide shaft sleeve; 7 is a fixed ring cover; 8 is a guide rod; 10 is a heating ring; 18 is a heating ring fixing piece; 19 is a first sliding groove; 20 is a first cavity; 23 is a second cavity. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings required by the description of the embodiments are briefly described below. Obviously, the described drawings are only part of the embodiments of the present application, not all embodiments, and those skilled in the art can obtain other design schemes and drawings from these drawings without creative labor.

[0018] The concept, specific structure and generated technical effects of the present application will be described clearly and completely below by combining with the embodiments and drawings, so as to fully understand the purposes, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments, and other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative labor are within the protection scope of the present application. In addition, all the connection relationships mentioned in the text do not mean that the components are directly connected, but that a better connection structure can be composed by adding or reducing connecting accessories according to the specific implementation situation. The technical features in the present application can be combined interactively without conflict.

[0019] Reference Figs. 1-3 A heating and melting pipetting device, comprising a heat insulation pressing assembly 1, a sample heating assembly 2 and an injection needle 3, the design of the heat insulation pressing assembly 1 effectively blocks the conduction of the heat of the heating cavity 4 to the operation end, reduces the risk of hand scalding of the operator, and provides safety guarantee for experimental operation; the heat insulation pressing assembly 1 is arranged on one end of the sample heating assembly 2, the sample heating assembly 2 is provided with a heating cavity 44 at one end close to the heat insulation pressing assembly 1, the output end of the heat insulation pressing assembly 1 is matched with the shape of the heating cavity 4, and the heat insulation pressing assembly 1 and the heating cavity 4 are slidingly connected, the sample heating assembly 2 can realize accurate control of the heating process, ensure uniform heating and stable temperature of the sample, and is beneficial to improve the accuracy of experimental results, and at the same time, the sliding connection design of the heat insulation pressing assembly 1 and the heating cavity 4 makes the sample transfer process stable and controllable, reduces sample residue and transfer error; the injection needle 3 is arranged on the end of the sample heating assembly 2 away from the heat insulation pressing assembly 1; In the present embodiment, the heat insulation pressing assembly 1 can effectively block the heat conduction from the heating cavity 4 to the operating end, reduce the risk of hand burns for the operating personnel, and build a strong safety line for experimental operation; the sample heating assembly 2 is designed by adapting to the heating cavity 4 of the heat insulation pressing assembly 1, which can ensure that the sample is heated uniformly and stably, reduce the experimental deviation caused by unstable heating, and help to improve the accuracy of experimental results; at the same time, the sliding connection design of the heat insulation pressing assembly 1 and the heating cavity 4 makes the sample transfer process stable and controllable, which not only reduces the sample residue, but also reduces the transfer error, and guarantees the precision of pipetting; the injection needle 3 is arranged at the output end of the sample heating assembly 2 away from the heat insulation pressing assembly 1, which further optimizes the sample transfer path, integrates the heating and pipetting functions of the overall device, simplifies the operation process, adapts to various experimental scenes, and comprehensively improves the safety, accuracy and efficiency of experimental operation.

[0020] The heat insulation pressing assembly 1 comprises a first shell unit 11 and a heat insulation pressing unit 12; the sample heating assembly 2 comprises a sample heating crucible and a second shell unit 21; the first shell unit 11 and the second shell unit 21 are fixedly connected; a first sliding groove 19 and a first cavity 20 are formed on the first shell unit 11, and the first sliding groove 19 is located beside the first cavity 20; a second cavity 23 is formed on the second shell unit 21; the first sliding groove 19 is in communication with the first cavity 20, and the first cavity 20 is in communication with the second cavity 23; the first shell unit 11 serves as a basic support, the first sliding groove 19 and the first cavity 20 form a communication channel, and the heat insulation pressing unit 12 is provided with a movement track and a mounting space; one end of the heat insulation pressing unit 12 is arranged in the first sliding groove 19, and the other end extends into the first cavity 20; the heat insulation pressing unit 12 can stably slide through the first sliding groove 19 and can transmit the pressing force to the heating cavity 4 through the communication relationship between the first cavity 20 and the subsequent second cavity 23; the heat insulation pressing unit 12 is arranged in the first sliding groove 19, and the heat insulation pressing unit 12 is in sliding connection with the first sliding groove 19; the output end of the heat insulation pressing unit 12 extends to the heating cavity 4 from the first cavity 20; the sample heating crucible is clamped with the second cavity 23, and the sample heating crucible is matched with the second cavity 23; the heating cavity 4 is arranged on the sample heating crucible, the other end of the heat insulation pressing unit 12 is in sliding connection with the heating cavity 4, and the liquid sample in the heating cavity 4 can be smoothly pushed during pressing; meanwhile, the sample heating crucible is clamped with the second cavity 23 as an independent component, which is convenient for subsequent disassembly, cleaning or replacement, and improves the flexibility of the device; the injection needle 3 is arranged on the output end of the sample heating crucible away from the heat insulation pressing unit 12, and forms a straight line path for pushing and outputting with the heating cavity 4, so that the sample can be transferred along a fixed direction through the needle under the action of pressing, the risk of residue and leakage is reduced, after the transfer is completed, the heat insulation pressing unit 12 is loosened to reset, and the above steps can be repeated if continuous operation is required; the first shell unit 11 and the second shell unit 21 are made of polyimide material, which can prevent scalding of personnel; In the embodiment, the first shell unit 11 and the second shell unit 21 are both made of polyimide material, which can effectively isolate the heat of the heating cavity 4, avoid the risk of hand scalding of the operator, and build a safety line for the experiment; the heat insulation pressing unit 12 relies on the first sliding groove 19 and the first cavity 20 of the first shell unit 11, can stably slide and accurately transmit the pressing force to the heating cavity 4, cooperate with the sliding connection with the heating cavity 4, can smoothly push the liquid sample, and in addition, the linear path formed by the injection needle 3 and the heating cavity 4 guarantees the precision of pipetting; the sample heating crucible is adaptively connected with the second cavity 23, which not only ensures stability during heating, but also facilitates disassembly, cleaning or replacement, and flexible adaptation to different sample processing requirements; the overall device operation process is simple, convenient to reset, can efficiently complete the heating and pipetting operation, and comprehensively improves the safety, accuracy and efficiency of the experiment operation.

[0021] The heat insulation pressing unit 12 comprises a heat insulation pressing structure 13, a first piston 14 and a first spring 15; one end of the heat insulation pressing structure 13 is arranged on the first sliding groove 19, and the other end of the heat insulation pressing structure 13 is arranged in the first cavity 20; one end of the first piston 14 is clamped with the heat insulation pressing structure 13 and can move synchronously with the heat insulation pressing structure 13; the other end of the first piston 14 is slidably connected with the heating cavity 4, and the other end of the first piston 14 is a spherical surface end; the spherical surface end of the first piston 14 is in contact with the spherical surface of the heating cavity 4, which can ensure that the liquid sample can be completely transferred and discharged during the pipetting process; the heat insulation pressing structure 13 is used for pushing the first piston 14 to move in the depth direction of the heating cavity 4; one end of the heat insulation pressing structure 13 is arranged in the first sliding groove 19, and the other end of the heat insulation pressing structure 13 extends into the first cavity 20; the heat insulation pressing structure 13 can realize stable sliding guidance through the first sliding groove 19, ensure the accuracy of the pressing action and avoid deviation, and further block the heat conduction to the hands of the operator by virtue of the heat insulation property; the core function of the heat insulation pressing structure 13 is to transmit the pressing force applied by the operator to the subsequent components and push the first piston 14 to move in the depth direction of the heating cavity 4, thereby providing power for sample transfer and avoiding safety hazards caused by heat conduction to the operation end; the first spring 15 is arranged around the first piston 14; the first spring 15 is located between the heat insulation pressing structure 13 and the sample heating crucible, and forms an elastic circulation mechanism for pressure and reset; during the liquid taking process, when the operator presses the heat insulation pressing structure 13, the first spring 15 is compressed and stores elastic potential energy; after the pressing structure is released, the spring releases the potential energy and pushes the first piston 14 and the heat insulation pressing structure 13 to automatically reset; during the reset process, the heating cavity 4 forms a negative pressure, thereby automatically sucking the liquid sample, and realizing the coherent operation of reset and sampling; when the liquid sample is transferred, the operator presses the heat insulation pressing structure 13, the heat insulation pressing structure 13 slides along the first sliding groove 19 and pushes the first piston 14 to move towards the heating cavity 4, and the first spring 15 is compressed synchronously; the spherical surface end of the first piston 14 is closely combined with the heating cavity 4, the liquid sample in the heating cavity is smoothly pushed to the injection needle 3, after the transfer is completed, the heat insulation pressing structure 13 is released, and the first spring 15 is reset under the action of the elastic force, thereby driving the first piston 14 and the heat insulation pressing structure 13 to return to the initial position. In the embodiment, the heat insulation pressing structure 13 slides stably relying on the first sliding groove 19, has the heat insulation property, can block the heat conduction to the hands, avoid the risk of scalding of the operator, accurately transmit the pressing force and avoid the deviation of the pressing; the spherical surface end of the first piston 14 is in contact with the spherical surface of the heating cavity 4, which can completely transfer and discharge the liquid sample, improve the pipetting precision and the accuracy of experimental data; the first spring 15 is arranged around the first piston 14 and forms an elastic circulation mechanism; the first spring 15 is compressed to store energy when pressed, and is automatically reset after being released, thereby driving the components to return to the initial position, and the whole fully meets the safety, precision and efficiency requirements of sample processing.

[0022] The heat insulation pressing structure 13 comprises a heat insulation pressing piece, a second spring 5, a guide piece and a guide rod 8, the heat insulation pressing piece is arranged on the first sliding groove 19 and is in sliding connection with the first sliding groove 19, the heat insulation pressing piece serves as a direct operation component and is in sliding connection with the first sliding groove 19, which not only provides a force application fulcrum for the operator but also ensures that the pressing action is performed along a preset track through sliding cooperation, the heat insulation characteristic of the heat insulation pressing piece can block the conduction of heat to the hand, and the heat insulation characteristic cooperates with the overall heat insulation design to form a safe operation barrier; the guide piece and the guide rod 8 are both arranged on the first cavity 20, a guide hole is formed in the guide piece, and the rod body of the guide rod 8 penetrates through the guide hole and is in sliding connection with the guide hole, the guide piece is fixed to the first cavity 20, the guide hole on the guide piece provides accurate axial constraint for the guide rod 8, so that the guide rod 8 can only move linearly along the hole, one end of the guide rod 8 is fixed to the heat insulation pressing piece, and the other end is clamped to the first piston 14 through the first clamping hole, thereby constructing a rigid force transmission chain of the heat insulation pressing structure 13, the guide rod 8 and the first piston 14, and ensuring efficient transmission of the pressing force; one end of the guide rod 8 is fixedly connected to the heat insulation pressing piece; a first clamping hole matched with the first piston 14 is formed in the other end of the guide rod 8, the first clamping hole is clamped to one end of the first piston 14, and the tapered centering surface of the first clamping hole is clamped to the tapered centering surface of one end of the first piston 14, so that the two can be concentrically forced, the force application direction is consistent with the axis of the heating cavity 4, and component wear or jamming caused by lateral force is avoided; the second spring 5 is sleeved on one end of the guide rod 8, and the second spring 5 is located between the heat insulation pressing piece and the guide piece, the second spring 5 is sleeved on the end of the guide rod 8 close to the heat insulation pressing piece and is located between the pressing piece and the guide piece, the spring is compressed to store energy during pressing, and the energy is released to push the pressing piece to reset after being released, thereby assisting the overall structure to return to the original position, buffering the pressing impact force and reducing the rigidity loss of the components; In the embodiment, the heat insulation pressing piece has the functions of force application fulcrum and heat insulation, cooperates with the sliding constraint of the first sliding groove 19, can block the conduction of heat to the hand to avoid the risk of scalding, and ensures that the pressing is performed along a preset track; the guide piece provides axial constraint for the guide rod 8 through the guide hole, and in combination with the rigid force transmission chain formed by the guide piece, the guide rod 8 and the first piston 14, efficient transmission of the pressing force is realized; the tapered centering surface of the first clamping hole cooperates with the tapered centering surface of the first piston 14 to ensure concentric force application and avoid component wear or jamming caused by lateral force; the second spring 5 can buffer the pressing impact, reduce the rigidity loss, and also assist the pressing piece to reset without manual adjustment, so that the overall structure is smooth and coherent in pressing, force transmission, resetting and process, the operation stability, pipetting precision and service life of the device are improved, and the needs of safety and efficiency in experiments are fully met.

[0023] The guide includes a guide sleeve 6 and a fixed ring cover 7, both of which are provided on the first cavity 20. The guide sleeve 6 is a core functional component, and the guide hole provided thereon provides a precise axial sliding channel for the guide rod 8. The close fit between the hole and the rod limits the radial displacement of the guide rod 8, ensures its stable movement along the axial direction, and provides a basic guarantee for the linear transmission of the pressing force. The fixed ring cover 7 is located beside the guide sleeve 6 and is used to fix the guide sleeve 6. The guide hole is provided on the guide sleeve 6, and the material (such as graphite) of the guide sleeve 6 can reduce the sliding friction with the guide rod 8, reduce component wear, cooperate with the buffering effect of the second spring 5, and further improve the motion stability of the overall structure. The fixed ring cover 7 is located beside the guide sleeve 6 and is specially responsible for fixing the guide sleeve 6. Through the connection with the first cavity 20, the guide sleeve 6 is firmly positioned to prevent it from loosening or deviating during repeated sliding of the guide rod 8, ensure that the guide hole is concentric with the axis of the first cavity 20 and the heating cavity 4, and reduce the force transmission loss or component wear caused by the position deviation of the guide sleeve 6 from the structural level. In this embodiment, the guide sleeve 6 provides a precise guide hole, limits the radial displacement of the guide rod 8, ensures its stable movement along the axial direction, cooperates with the wear-resistant material such as graphite, reduces the sliding friction with the guide rod 8, and reduces component wear. The fixed ring cover 7 firmly fixes the guide sleeve 6 to prevent it from loosening or deviating during repeated operation, ensures that the guide hole is concentric with the axis of the first cavity 20 and the heating cavity 4, avoids force transmission loss and component wear caused by position deviation from the structure, enhances the reliability of linear transmission of pressing force, improves sample transfer accuracy, reduces friction and deviation, prolongs the service life of the device, and facilitates assembly and maintenance. The overall operation stability and durability of the device are optimized.

[0024] The sample heating crucible comprises a crucible body 22 and a heating structure; the heating structure is matched with the shape of the second cavity 23, and the heating structure is clamped with the second cavity 23; the crucible body 22 is a part directly contacting the sample, and a heating cavity 4 is arranged on the crucible body 22 for accommodating the sample to be treated; the output end of the heat insulation pressing unit 12 is connected with the injection needle 3 away from the crucible body 22, forming a sample transfer channel of the heating cavity 4 and the injection needle 3; a second clamping hole matched with the shape of the crucible body 22 is arranged on the heating structure; the crucible body 22 is clamped with the second clamping hole, which not only ensures stable installation, but also facilitates quick disassembly and replacement; the crucible body 22 of an appropriate material can be selected according to different sample characteristics (such as corrosiveness and high viscosity); the heat generated by the heating structure can be efficiently conducted to the crucible body 22, so that the sample in the heating cavity 4 is uniformly heated; the clamping design takes into account the assembly convenience and heat transfer efficiency; the injection needle 3 is arranged on the end of the crucible body 22 away from the heat insulation pressing unit 12; and the heating cavity 4 is arranged on the crucible body 22. In the embodiment, the heating structure is clamped and fixed with the second cavity 23, ensuring the overall stability; the heat generated by the heating structure is efficiently conducted through the clamping surface of the crucible body 22, ensuring that the sample in the heating cavity 4 is uniformly heated and improving the heating efficiency; the crucible body 22 as a part directly contacting the sample is clamped with the second clamping hole of the heating structure, which not only ensures stable installation, but also facilitates quick disassembly and replacement; an appropriate material can be selected according to different sample characteristics such as corrosiveness and high viscosity, avoiding cross contamination and reducing maintenance difficulty; the heating cavity 4 and the injection needle 3 form a smooth transfer channel, cooperating with the stable clamping structure to ensure that there is no leakage during sample transfer, thereby enhancing the safety, adaptability and experimental accuracy of the device as a whole, and meeting the diversified sample processing requirements.

[0025] One end of the crucible body 22 is an output interface matched with the shape of the injection needle 3; and the injection needle 3 is at least partially arranged in the output interface; the output interface is a conical nipple type interface. In the embodiment, the output end of the crucible body 22 adopts a conical nipple type interface matched with the injection needle 3, and stable connection is achieved through clamping; the design ensures that the injection needle 3 is tightly installed, avoiding leakage during sample transfer; the conical structure enhances the sealing property; meanwhile, the clamping mode facilitates quick replacement of the needle, reduces the risk of cross contamination, ensures the experimental precision and operation efficiency, and meets the diversified pipetting requirements.

[0026] The heating structure comprises a heating ring 10 and a heating ring fixing part 18, the heating ring 10 is a ceramic heating ring 10, and an opening is arranged on the heating ring, and a temperature sensor is arranged in the opening; the heating ring 10 is matched with the second cavity 23 in shape, can be stably fixed by clamping, and can provide a stable heat source for the sample by using the high-temperature resistance and uniform heat conduction characteristics of the ceramic material, and the close fit with the second cavity 23 ensures that the heat is not easily lost, and the heating efficiency is improved, the heating ring 10 is clamped with the second cavity 23; a third clamping hole matched with the heating ring fixing part 18 in shape is arranged on the heating ring 10, and the heating ring fixing part 18 is clamped with the third clamping hole; the second clamping hole is arranged on the heating ring fixing part 18, and the crucible body 22 and the second clamping hole are connected by taper surface contact connection with self-locking property, forming an interlocking structure, and the taper angle is 3°, the design has a self-locking function, the crucible body 22 can be fixed in the heating ring fixing part 18 by self-locking, and the crucible can also be conveniently disassembled, charged and cleaned, when the sample to be heated is a solid sample, the crucible body 22 is taken out from the second clamping hole, the sample to be treated is added into the heating cavity 4, and then the crucible body 22 is reset and clamped with the second clamping hole; In the embodiment, the ceramic heating ring 10 is matched and clamped with the second cavity 23, a stable heat source is provided by using the high-temperature resistance and uniform heat conduction characteristics, the close fit design reduces heat loss, and the heating efficiency is improved; the heating ring fixing part 18 is connected with the heating ring 10 through the third clamping hole, the overall stability is enhanced, the temperature sensor in the opening can monitor the temperature in real time, the temperature control accuracy is ensured, the second clamping hole on the heating ring fixing part 18 is connected with the crucible body 22 by 3° taper self-locking, the crucible body 22 is stably fixed by the interlocking structure, and can be conveniently disassembled, charged and cleaned, and is suitable for solid sample treatment; the overall design ensures that the components are reliably connected at high temperature, avoids leakage risk, is compatible with various sample types, and improves experimental efficiency and result accuracy.

[0027] The heat insulation pressing part comprises a spring block 16 and a pressing handle 17; the pressing handle 17 is arranged on the spring block 16; the spring block 16 is arranged on the first sliding groove 19, and the spring block 16 is slidingly connected with the first sliding groove 19; In the embodiment, the spring block 16 is arranged on the first sliding groove 19 and is in sliding connection with the first sliding groove 19, which not only provides a stable support point for the second spring 5 and ensures that the spring compression and reset process are uniformly stressed, but also realizes linear guidance of the pressing action through the sliding groove constraint to avoid force transmission loss caused by deviation; the pressing handle 17 is installed on the spring block 16 to provide a comfortable force point for the operator, facilitate accurate control of the pressing force, and improve the operation feel; the overall structure ensures smooth and coherent pressing action by virtue of the sliding connection characteristics, and can effectively block heat conduction in cooperation with the heat insulation material to reduce the risk of scalding for the operator; at the same time, the combined design of the spring block 16 and the handle simplifies the assembly of components, reduces the maintenance difficulty, and can form an efficient force transmission chain with the guide rod 8, the first piston 14 and other components to ensure that the sample transfer process is stable and controllable. The scheme not only ensures the operation safety, but also enhances the operation convenience and structural reliability of the device, and adapts to the needs of high-frequency experimental scenes.

[0028] The first shell unit 11 includes sequentially connected end cover, grip shell, mounting outer shell, heat insulation outer shell, guide outer shell and isolation outer shell, and the end cover is mainly used for fixing the equipment cable; the guide shaft sleeve 6 is a graphite shaft sleeve for guiding, and the mounting outer shell is used for mounting the guide shaft sleeve 6; the guide outer shell is internally provided with a wire passing hole for the cable passing hole of the temperature sensor and the heating ring 10; the first sliding groove 19 is located on the end cover and the grip shell, and the first sliding groove 19 is a waist-shaped groove; the first cavity 20 is located on the mounting outer shell, the heat insulation outer shell, the guide outer shell and the isolation outer shell, and the heat insulation outer shell, the guide outer shell and the isolation outer shell can isolate the heat conduction of the heating ring 10 to the upper part such as the grip shell; the isolation outer shell is fixedly connected with the second shell; In the embodiment, the end cover fixes the equipment cable to avoid line looseness interference; the grip shell and the end cover form a waist-shaped groove type first sliding groove to provide stable sliding guidance for the heat insulation pressing piece; the mounting outer shell accurately installs the guide shaft sleeve to ensure the movement accuracy of the guide rod, and the heat insulation outer shell, the guide outer shell, the isolation outer shell and the mounting outer shell jointly constitute the first cavity, and the former three form a multiple heat insulation barrier to effectively block the heat conduction of the heating ring upward to the grip shell, avoid the risk of scalding for the operator, and standardize the temperature sensor and the heating ring cable layout through the wire passing hole of the guide outer shell to avoid line clutter affecting the operation of the components. The sequentially fixed connection of the shells and the connection of the isolation outer shell and the second shell make the overall structure stable, which not only improves the force transmission and operation accuracy, but also simplifies the assembly and maintenance, and adapts to the needs of precise experiments.

[0029] The preferred embodiments of the application are specifically described above, but the application is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A heating, melting, and liquid transfer device, characterized in that: The sample heating assembly includes a heat-insulating pressing component (1), a sample heating component (2), and an injection needle (3). The heat-insulating pressing component (1) is disposed on one end of the sample heating component (2). The sample heating component (2) has a heating cavity (4) at the end near the heat-insulating pressing component (1). The output end of the heat-insulating pressing component (1) is adapted to the shape of the heating cavity (4), and the heat-insulating pressing component (1) is slidably connected to the heating cavity (4). The injection needle (3) is disposed on the end of the sample heating component (2) away from the heat-insulating pressing component (1).

2. The heating, melting, and liquid transfer device as described in claim 1, characterized in that: The heat-insulating pressing assembly (1) includes a first housing unit (11) and a heat-insulating pressing unit (12); the sample heating assembly (2) includes a sample heating crucible and a second housing unit (21); the first housing unit (11) and the second housing unit (21) are fixedly connected; the first housing unit (11) has a first sliding groove (19) and a first cavity (20), the first sliding groove (19) is located beside the first cavity (20); the second housing unit (21) has a second cavity (23), the first sliding groove (19) is connected to the first cavity (20), and the first cavity (20) is connected to the sample heating crucible. The second cavity (23) is connected; the heat-insulating pressing unit (12) is located in the first sliding groove (19), and the heat-insulating pressing unit (12) is slidably connected to the first sliding groove (19); the output end of the heat-insulating pressing unit (12) extends to the first cavity (20) and then to the heating cavity (4); the sample heating crucible is engaged with the second cavity (23); the heating cavity (4) is located on the sample heating crucible, and the other end of the heat-insulating pressing unit (12) is slidably connected to the heating cavity (4); the injection needle (3) is located on the output end of the sample heating crucible away from the heat-insulating pressing unit (12).

3. The heating, melting, and liquid transfer device as described in claim 2, characterized in that: The heat-insulating pressing unit (12) includes a heat-insulating pressing structure (13), a first piston (14), and a first spring (15); one end of the heat-insulating pressing structure (13) is disposed on the first sliding groove (19), and the other end of the heat-insulating pressing structure (13) is disposed in the first cavity (20); one end of the first piston (14) is engaged with the heat-insulating pressing structure (13); the other end of the first piston (14) is slidably connected to the heating cavity (4), and the heat-insulating pressing structure (13) is used to push the first piston (14) to move in the depth direction of the heating cavity (4); the first spring (15) is arranged around the first piston (14), and the first spring (15) is located between the heat-insulating pressing structure (13) and the sample heating crucible.

4. The heating, melting, and liquid transfer device as described in claim 3, characterized in that: The heat-insulating pressing structure (13) includes a heat-insulating pressing component, a second spring (5), a guide component, and a guide rod (8). The heat-insulating pressing component is disposed on the first sliding groove (19) and is slidably connected to the first sliding groove (19). The guide component and the guide rod (8) are both disposed on the first cavity (20). The guide component has a guide hole, and the rod body of the guide rod (8) passes through the guide hole and is slidably connected to the guide hole. One end of the guide rod (8) is fixedly connected to the heat-insulating pressing component. The other end of the guide rod (8) has a first snap-fit ​​hole adapted to the first piston (14), and the first snap-fit ​​hole snaps into one end of the first piston (14). The second spring (5) is sleeved on one end of the guide rod (8) and is located between the heat-insulating pressing component and the guide component.

5. The heating, melting, and liquid transfer device as described in claim 4, characterized in that: The guide component includes a guide bushing (6) and a fixing ring cover (7). The guide bushing (6) and the fixing ring cover (7) are both provided on the first cavity (20). The fixing ring cover (7) is located on the side of the guide bushing (6) and is used to fix the guide bushing (6). The guide hole is provided on the guide bushing (6).

6. The heating, melting, and liquid transfer device as described in claim 2, characterized in that: The sample heating crucible includes a crucible body (22) and a heating structure; the heating structure is adapted to the shape of the second cavity (23) and is snapped into the second cavity (23); the heating structure has a second snap-fit ​​hole adapted to the shape of the crucible body (22); the crucible body (22) is snapped into the second snap-fit ​​hole; the injection needle (3) is located on the end of the crucible body (22) away from the heat insulation pressing unit (12), and the heating cavity (4) is located on the crucible body (22).

7. The heating, melting, and liquid transfer device as described in claim 6, characterized in that: One end of the crucible body (22) is an output interface that is adapted to the shape of the injection needle (3), and the injection needle (3) is at least partially disposed in the output interface.

8. The heating, melting, and liquid transfer device as described in claim 6, characterized in that: The heating structure includes a heating ring (10) and a heating ring fixing member (18); the heating ring (10) is adapted to the shape of the second cavity (23), and the heating ring (10) is snapped into the second cavity (23); a third snapping hole adapted to the shape of the heating ring fixing member (18) is provided on the heating ring (10), and the heating ring fixing member (18) is snapped into the third snapping hole; the second snapping hole is provided on the heating ring fixing member (18).

9. The heating, melting, and liquid transfer device as described in claim 4, characterized in that: The heat-insulating pressing component includes a spring stop (16) and a pressing handle (17), the pressing handle (17) being disposed on the spring stop (16); the spring stop (16) being disposed on the first slide groove (19), the spring stop (16) being slidably connected to the first slide groove (19).

10. The heating, melting, and liquid transfer device as described in claim 2, characterized in that: The first housing unit (11) includes an end cap, a gripping housing, a mounting housing, a heat-insulating housing, a guide housing, and an isolation housing connected in sequence; the first slide (19) is located on the end cap and the gripping housing; the first cavity (20) is located on the mounting housing, the heat-insulating housing, the guide housing, and the isolation housing; the isolation housing is fixedly connected to the second housing.

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