Rotary table structure and constant-temperature Raman detection equipment
By incorporating a turntable with gas supply pipes and gas channels into the turntable structure, combined with a sealed chamber, dynamic and uniform heating of solid samples is achieved, solving the problem of unstable Raman spectral signals caused by sample temperature fluctuations and improving the reliability and efficiency of automated detection.
Patent Information
- Application Number
- CN202512049949.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-02-27
AI Technical Summary
In existing technologies, it is difficult to maintain the temperature of solid samples during transfer and detection, which leads to unstable Raman spectral signals and hinders automated and high-throughput detection.
A turntable structure was designed, including a turntable body with a gas supply pipe and a turntable with a gas channel. Dynamic and uniform heating is achieved by continuously introducing gas at a specified temperature into the sample cell. Combined with a sealed box, a controlled detection environment is constructed.
This method achieves temperature stability of solid samples during the detection process, ensures high-quality Raman spectral signals, and improves the reliability and efficiency of automated detection.
Smart Images
Figure CN121577537A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of oil detection and analysis, and particularly relates to a rotary table structure and a constant-temperature Raman detection device. BACKGROUND
[0002] Raman spectroscopy technology can quickly analyze sample components through molecular characteristic peaks, but when detecting samples in solid state at room temperature (such as lard), the samples need to be heated and melted to obtain high-quality spectra. At present, the method of preheating the sample independently (such as water bath or oven heating) before detection and then transferring it to the spectrometer stage is usually adopted. This method has obvious limitations, for example, the temperature of the sample is difficult to maintain during the transfer and detection process, especially when rotating scanning is performed on the rotary table, dynamic and continuous uniform heating cannot be achieved, which leads to unstable spectral signals and seriously hinders the realization of automatic and high-throughput detection. SUMMARY
[0003] The technical problem to be solved by the present application is to solve at least one of the above technical problems.
[0004] The solution to the technical problem of the present application is: A rotary table structure, comprising a base, a rotary table main body and a rotating disc, the rotary table main body is arranged on the base; the rotating disc is detachably arranged on the rotary table main body, the rotary table main body drives the rotating disc to rotate around a vertical axis, a plurality of sample grooves with openings facing upward are arranged on the rotating disc; a plurality of gas supply pipes are arranged on the rotary table main body, a plurality of air passages are arranged on the rotating disc, one end of each air passage is connected to the corresponding sample groove in communication, and the other end of each air passage is connected to the corresponding gas supply pipe in communication.
[0005] As a further improvement of the above technical solution, the rotary table main body comprises an outer cylinder, a mandrel and a driving motor, the driving motor is arranged on the base, the outer cylinder is fixed on the base, the mandrel is arranged in the outer cylinder, the driving motor drives the mandrel to rotate relative to the outer cylinder, the rotating disc is arranged on the mandrel, a plurality of gas supply pipes are arranged in the mandrel, a third air hole is arranged on the outer cylinder, a plurality of first air holes are arranged on the upper end surface of the mandrel, a plurality of air grooves are arranged on the side surface of the mandrel around the circumferential surface of the mandrel, a plurality of second air holes are arranged on the mandrel, each second air hole is arranged in the corresponding air groove, the third air hole is connected to the corresponding air groove in communication, one end of each gas supply pipe is connected to the corresponding first air hole in communication, the other end of each gas supply pipe is connected to the corresponding second air hole in communication, each first air hole is connected to the corresponding air passage in communication, and the first air hole, the second air hole and the gas supply pipe are arranged one by one.
[0006] As a further improvement of the above technical solution, the bottom of the rotating disc extends downwardly to a clamping block, the top surface of the mandrel is provided with a clamping groove, and the clamping block is inserted into the clamping groove, so that the rotating disc and the mandrel are synchronously moved.
[0007] As a further improvement of the above technical solution, the clamping block is annular, the inner wall of the annular clamping block is provided with splines, and the clamping groove and the splines are in concave-convex matching.
[0008] As a further improvement of the above technical solution, the rotating table body further comprises a first pulley, a second pulley and a synchronous belt, the first pulley and the second pulley are drivingly connected through the synchronous belt, the first pulley is fixed on the mandrel, the first pulley and the mandrel are coaxially driven, the second pulley is fixed on the output shaft of the driving motor, and the second pulley and the driving motor are coaxially driven.
[0009] As a further improvement of the above technical solution, a plurality of sealing rings are sleeved on the side surface of the mandrel, and a ventilation groove is arranged between adjacent upper and lower sealing rings.
[0010] As a further improvement of the above technical solution, the bottom surface of the rotating disc is provided with a plurality of pipe joints, the air ducts are connected to the pipe joints in one-to-one correspondence, and the pipe joints are connected to the gas supply pipeline.
[0011] As a further improvement of the above technical solution, a avoiding groove is formed in the middle of the top surface of the rotating disc, a plurality of light transmission holes are formed in the inner wall of the avoiding groove, and the light transmission holes are connected to the sample groove in one-to-one correspondence.
[0012] As a further improvement of the above technical solution, a first through hole is formed in the rotating table body in the upward and downward direction, and the first through hole is connected to the avoiding groove.
[0013] The application also provides a constant-temperature Raman detection device comprising a sealing box and the rotating table structure, and the base, the rotating table body and the rotating disc are arranged in the sealing box.
[0014] The rotating table structure provided by the application realizes dynamic and online uniform heating of solid samples, effectively solves the problem of unstable Raman spectrum signal caused by temperature drop during sample transfer and detection, and provides a basis for automatic and high-throughput Raman detection of solid samples.
[0015] The constant-temperature Raman detection device provided by the application sets the rotating table structure in the sealed box to build a controlled detection environment. The sealed box can isolate the external environment interference, which is conducive to maintaining the stability of the temperature field and the gas environment in the box, and provides good external conditions for the rotating table structure to accurately control the temperature of the sample. The device combines sample rotation scanning, online constant-temperature heating and sealed environment, can ensure that the solid sample is in the best and stable temperature state during the entire detection process, thereby obtaining a Raman spectrum with good repeatability and high signal-to-noise ratio, and significantly improves the reliability and efficiency of the automatic detection. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a schematic diagram of the rotating table structure of an embodiment of the application.
[0017] Figure 2 is an axonometric view of the rotating disc of an embodiment of the application. Figure One .
[0018] Figure 3 is an axonometric view of the rotating disc of an embodiment of the application. Figure Two .
[0019] Figure 4 is an axonometric view of the rotating disc and the mandrel of an embodiment of the application.
[0020] Figure 5 is a cross-sectional schematic view of the mandrel of the application.
[0021] Reference signs in the drawings: 1 - base, 2 - rotating table main body, 20 - gas supply pipeline, 200 - first through hole, 21 - outer cylinder, 211 - third air hole, 22 - mandrel, 221 - first air hole, 222 - air groove, 2221 - sealing ring, 223 - second air hole, 224 - clamping groove, 23 - driving motor, 231 - synchronous belt, 232 - first pulley, 233 - second pulley, 3 - rotating disc, 30 - sample groove, 31 - clamping block, 311 - spline, 32 - avoiding groove, 33 - light transmission hole, 34 - second through hole, 35 - air duct, 36 - pipe joint. DETAILED DESCRIPTION
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application, the above description of the embodiments uses the drawings to make a brief description. Obviously, the described drawings are only some of the embodiments of the application, not all embodiments, and those skilled in the art can obtain other design schemes and drawings from these drawings without creative labor.
[0023] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connection relationships mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.
[0024] This invention provides a turntable structure designed to address the problem of unstable spectral signals in Raman spectroscopy detection of solid samples at room temperature due to temperature drops. This structure allows for the continuous introduction of a constant-temperature gas into the sample as it rotates with the turntable 3, achieving dynamic and uniform heating of the sample and ensuring the reliability of high-throughput automated detection.
[0025] The turntable structure includes a base 1, a turntable body 2, and a turntable 3. The turntable body 2 is mounted on the base 1. The turntable 3 is detachably mounted on the turntable body 2 and is driven by the turntable body 2 to rotate around a vertical axis. The turntable 3 has multiple upward-facing sample slots 30 for accommodating samples to be tested. Multiple gas supply pipes 20 are located inside the turntable body 2. Multiple gas channels 35 are located inside the turntable 3. One end of each gas channel 35 is connected to the interior of a sample slot 30, and the other end is connected to a gas supply pipe 20. The gas supply pipes 20 are used to supply gases at a specified temperature, such as hot nitrogen, dry hot air, or hot inert gas, which can maintain the lard sample in a molten state.
[0026] Its working principle is as follows: During Raman spectroscopy detection, the drive stage 2 drives the turntable 3 and the sample placed in its sample cell 30 to rotate at a uniform speed. Simultaneously, gas at a specified temperature is introduced from an external gas source into the gas supply pipe 20, and finally delivered to the corresponding sample cell 30 via the gas channel 35, continuously and uniformly heating the sample within the cell. Because the heating gas acts directly and dynamically on each rotating sample, it effectively counteracts heat loss during the detection process, ensuring that the sample remains in a constant molten or softened state throughout the scan, thereby obtaining a stable, high-quality Raman spectral signal. This design avoids temperature fluctuations caused by sample transfer, providing a foundation for automated, high-throughput Raman detection of solid samples.
[0027] A specific structure of the turntable body 2 includes an outer cylinder 21, a mandrel 22 and a driving motor 23. The driving motor 23 is arranged on the base 1. The outer cylinder 21 is fixedly installed on the base 1. The mandrel 22 is coaxially arranged inside the outer cylinder 21. The driving motor 23 is used to drive the mandrel 22, so that the mandrel 22 can rotate relative to the fixed outer cylinder 21. The turntable 3 is installed on the top of the mandrel 22 and rotates with the mandrel 22. In order to realize the conveying of gas from the stationary outer cylinder 21 to the rotating mandrel 22, a plurality of passages serving as gas supply pipes 20 are arranged in the mandrel 22. A plurality of first air holes 221 are arranged on the upper end surface of the mandrel 22. A plurality of annular air grooves 222 are arranged on the side surface of the mandrel 22 and surround the circumferential surface thereof. In the region corresponding to each air groove 222, a second air hole 223 is arranged on the mandrel 22, so that the air groove 222 is connected with the gas supply pipe 20 inside the mandrel 22. Correspondingly, a third air hole 211 is arranged on the wall of the stationary outer cylinder 21 at the position corresponding to each air groove 222, for connecting with an external gas source. The first air holes 221, the second air holes 223, the gas supply pipes 20 inside the mandrel 22 and the third air holes 211 on the outer cylinder 21 are arranged one by one in correspondence. In operation, the constant-temperature gas enters from the third air holes 211 of the outer cylinder 21, reaches the sealed chamber formed between the mandrel 22 and the outer cylinder 21 corresponding to a certain annular air groove 222, then enters the gas supply pipe 20 inside the mandrel 22 through the second air hole 223 on the mandrel 22, and finally flows out from the first air holes 221. The first air holes 221 are connected with the air passages 35 on the turntable 3, so as to finally guide the gas into the sample groove 30. The structure uses the annular air groove 222 as a rotating interface, realizes the continuous and stable conveying of gas from the stationary part (the outer cylinder 21) to the rotating part (the mandrel 22), and the plurality of gas paths are independent of each other and can be controlled respectively.
[0028] In order to reliably connect the turntable 3 and the mandrel 22 and make them rotate synchronously, the bottom of the turntable 3 extends downward to form a clamping block 31, and the top surface of the mandrel 22 is provided with a clamping groove 224. When installed, the clamping block 31 on the bottom of the turntable 3 is inserted into the clamping groove 224 on the top surface of the mandrel 22. Through the cooperation of the clamping block 31 and the clamping groove 224, the rotating power of the mandrel 22 is directly transmitted to the turntable 3, so as to ensure that there is no relative sliding between the two and that they move synchronously. The detachable connection mode also facilitates the installation, disassembly and cleaning of the turntable 3.
[0029] On the basis of the cooperation of the clamping block 31 and the clamping groove 224 to realize the synchronous rotation of the turntable 3 and the mandrel 22, in order to make the connection of the air passage 35 and the gas supply pipe 20 at the joint between the turntable 3 and the mandrel 22 more reliable and prevent the constant-temperature gas from leaking at the joint, the bottom surface of the clamping groove 224 can be made of a magnetic material. Correspondingly, the clamping block 31 on the bottom of the turntable 3 can be made of a material (such as iron, steel or other ferromagnetic materials) that can be attracted by a magnetic material, or can have magnetism as a whole.
[0030] When the rotating disc 3 is installed to the mandrel 22, the clamping block 31 is inserted into the clamping groove 224. While the mechanical cooperation achieves the circumferential positioning and transmission, the magnetic material at the bottom of the clamping groove 224 generates a vertical downward adsorption force to the clamping block 31. The adsorption force can press the rotating disc 3 more firmly against the top surface of the mandrel 22, so that a more close fit is obtained between each pipe joint 36 on the bottom surface of the rotating disc 3 and the corresponding first vent hole 221 on the top surface of the mandrel 22. The close fit effectively improves the sealing of the gas path connection interface, reduces the possibility of constant temperature gas leakage due to the existence of small gap in the butt joint surface, ensures the stability of the gas flow and temperature into the sample groove 30, and further guarantees the uniform and continuous heating effect on the sample.
[0031] To further enhance the stability of transmission and prevent slipping, the clamping block 31 can be annular. The inner wall of the annular clamping block 31 is provided with a spline 311, and correspondingly, the side wall of the clamping groove 224 on the top surface of the mandrel 22 is provided with a key tooth in convex-concave cooperation with the spline 311. Through the meshing of the spline 311 and the key tooth, the contact area for transmitting torque is increased, so that the power connection between the rotating disc 3 and the mandrel 22 is more stable and can withstand longer continuous operation.
[0032] To make the driving transmission stable, the turntable body 2 further includes a first pulley 232, a second pulley 233 and a synchronous belt 231. The first pulley 232 is fixed on the mandrel 22 and is coaxially transmission connected with the mandrel 22. The second pulley 233 is fixed on the output shaft of the driving motor 23 and is coaxially transmission connected with the driving motor 23. The first pulley 232 and the second pulley 233 are connected through the synchronous belt 231. When the driving motor 23 works, the mandrel 22 is driven to rotate through the synchronous belt 231 transmission. The synchronous belt 231 transmission has the advantages of stable transmission, low noise and shock absorption, which is beneficial to ensure the uniformity of the rotating speed of the rotating disc 3, thereby ensuring the consistency of the Raman laser scanning the sample in rotation.
[0033] To maintain the sealing of the gas path between the third vent hole 211 of the outer cylinder 21 and the vent groove 222 of the mandrel 22, and prevent high temperature gas leakage from affecting the heating effect or equipment operation, a plurality of sealing rings 2221 are sleeved on the side surface of the mandrel 22. Between the upper and lower adjacent two sealing rings 2221, the area of an annular vent groove 222 is just defined. The sealing ring 2221 is closely fitted with the inner wall of the outer cylinder 21, which separates the adjacent vent grooves 222 and the vent grooves 222 from the external environment, forming independent sealed gas chambers. This design ensures the sealing reliability of multiple independent gas paths under rotation.
[0034] To facilitate the abutment and sealing of the air passages 35 on the rotating disc 3 and the first air passages 221 on the mandrel 22, the bottom surface of the rotating disc 3 is provided with a plurality of pipe joints 36. Each air passage 35 is in communication with one pipe joint 36. When the rotating disc 3 is installed, each pipe joint 36 is aligned and inserted into the corresponding first air passage 221 on the top surface of the mandrel 22. The provision of the pipe joints 36 makes the connection of the gas path more convenient, and the air tightness of the abutment can be ensured by adding a sealing ring 2221 or the like outside the pipe joint 36, thereby preventing gas leakage at the connection.
[0035] To adapt to the optical path requirements of the Raman spectrometer, allow the laser to irradiate onto the sample from above and collect scattered light, a clearance groove 32 is formed in the middle of the top surface of the rotating disc 3. A plurality of light transmission holes 33 are formed in the inner wall of the clearance groove 32. These light transmission holes 33 are in one-to-one correspondence with the side or bottom of each sample groove 30. When the rotating disc 3 rotates to move a certain sample groove 30 to the detection position, the Raman laser can irradiate onto the sample in the sample groove 30 through the clearance groove 32 and the corresponding light transmission hole 33, and the backscattered or side-scattered light can be collected. The clearance groove 32 provides space for the optical path, avoiding the obstruction of the optical path by other parts of the rotating disc 3.
[0036] To further optimize the optical path and possibly introduce other detection devices, a first through hole 200 can be formed in the rotating table body 2, which extends in the up-down direction. The first through hole 200 is in axial communication with the second through hole 34 of the clearance groove 32 on the rotating disc 3, forming a vertical channel from the bottom of the rotating table to the sample. This design is compatible with optical systems that illuminate or detect from the bottom, increasing the flexibility of equipment integration.
[0037] The present application also provides a constant-temperature Raman detection device, which comprises a sealed box and the rotating table structure of any of the above embodiments. The base 1, the rotating table body 2 and the rotating disc 3 are all arranged inside the sealed box. The sealed box can provide a space for sample detection that is isolated from external environmental interference and has a stable temperature field. The constant-temperature gas can be pre-equilibrated in the sealed box before being introduced into the rotating table, further ensuring that the sample is in a precise constant-temperature environment. The entire detection process, including rotation, heating and spectrum acquisition of the sample, is automatically completed in the sealed box, realizing high-quality and high-throughput automated Raman spectrum detection of solid samples.
[0038] The preferred embodiments of the present application are described in detail above, but the present 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 present application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.
Claims
1. A turret structure comprising a base (1), characterised in that, The rotating table structure further comprises a rotating table body (2) and a rotating disc (3), the rotating table body (2) is arranged on the base (1), the rotating disc (3) is detachably arranged on the rotating table body (2), the rotating table body (2) drives the rotating disc (3) to rotate around a vertical axis, a plurality of sample grooves (30) with openings facing upwards are arranged on the rotating disc (3), a plurality of gas supply pipes (20) are arranged on the rotating table body (2), a plurality of gas channels (35) are arranged on the rotating disc (3), one end of each of the gas channels (35) is in communication with the sample grooves (30) one by one, and the other end of each of the gas channels (35) is in communication with the gas supply pipes (20) one by one.
2. The turntable structure according to claim 1, characterized in that The rotating table body (2) comprises an outer cylinder (21), a mandrel (22) and a driving motor (23), the driving motor (23) is arranged on the base (1), the outer cylinder (21) is fixed on the base (1), the mandrel (22) is arranged in the outer cylinder (21), the driving motor (23) drives the mandrel (22) to rotate relative to the outer cylinder (21), the rotating disc (3) is arranged on the mandrel (22), a plurality of gas supply pipes (20) are arranged in the mandrel (22), a third air hole (211) is arranged on the outer cylinder (21), a plurality of first air holes (221) are arranged on the upper end surface of the mandrel (22), a plurality of air grooves (222) are arranged on the side surface of the mandrel (22) and surround the circumferential surface of the mandrel (22), a plurality of second air holes (223) are arranged on the mandrel (22), each of the second air holes (223) is arranged in the air groove (222), each of the third air holes (211) is in communication with the air groove (222), one end of each of the gas supply pipes (20) is in communication with the first air hole (221), the other end of each of the gas supply pipes is in communication with the second air hole (223), each of the first air holes (221) is in butt joint with the gas channel (35), and each of the first air hole (221), the second air hole (223) and the gas supply pipe (20) is arranged one by one.
3. The turntable structure of claim 2, wherein The bottom of the rotating disc (3) extends downward to form a clamping block (31), the top surface of the mandrel (22) is provided with a clamping groove (224), and the clamping block (31) is inserted into the clamping groove (224) to realize synchronous movement between the rotating disc (3) and the mandrel.
4. The turntable structure according to claim 3, wherein The clamping block (31) is arranged in an annular shape, the inner wall of the annular clamping block (31) is provided with a spline (311), and the clamping groove (224) and the spline (311) are in concave-convex matching.
5. The turntable structure of claim 2, wherein The rotary table body (2) further comprises a first pulley (232), a second pulley (233) and a synchronous belt (231), the first pulley (232) and the second pulley (233) are drivingly connected through the synchronous belt (231), the first pulley (232) is fixed on the mandrel (22), the first pulley (232) and the mandrel (22) are coaxially driven, the second pulley (233) is fixed on the output shaft of the driving motor (23), the second pulley (233) and the driving motor (23) are coaxially driven.
6. The turntable structure of claim 2, wherein A plurality of sealing rings (2221) are sleeved on the side surface of the mandrel (22), and a ventilation groove is arranged between the sealing rings (2221) adjacent to each other.
7. The turntable structure of claim 1, wherein The bottom surface of the rotary disc (3) is provided with a plurality of pipe joints (36), the air ducts (35) are in one-to-one correspondence with the pipe joints (36) and are connected thereto, and the pipe joints (36) are connected to the gas supply pipeline.
8. The turntable structure of claim 1, wherein The top surface of the rotary disc (3) is provided with an avoiding groove (32) in the middle, the inner wall of the avoiding groove (32) is provided with a plurality of light transmission holes (33), and the light transmission holes (33) are in one-to-one correspondence with the sample grooves (30).
9. The turntable structure of claim 8, wherein, The rotary table body (2) is provided with a first through hole (200) in the up-down direction, the bottom surface of the avoiding groove (32) is provided with a second through hole (34), and the first through hole (200) and the second through hole (34) are connected.
10. A thermostated Raman detection device, characterized in that The application further provides a sealed box and a rotary table structure as claimed in any one of claims 1 to 9, wherein the base (1), the rotary table body (2) and the rotary disc (3) are arranged in the sealed box.