Thermostatic bath with sample holder rotation mechanism
By introducing a sample holder rotation mechanism into the constant temperature bath, the reciprocating motion of the sample holder and impeller is realized, which solves the problem of uneven temperature and improves the precision and accuracy of temperature-sensitive experiments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING SHANGHE MEASUREMENT & CONTROL TECHNOLOGY CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-21
AI Technical Summary
The uneven temperature distribution caused by the fixed position of the sample in the existing constant temperature bath affects the accuracy and repeatability of the experimental results, especially in temperature-sensitive experiments, where the temperature difference may reach ±0.1℃ or even higher.
Design a thermostatic bath with a sample holder rotation mechanism. By controlling the turntable to drive the sample holder and impeller to reciprocate and rotate, the temperature difference in the thermostatic bath can be eliminated, thus achieving uniformity of temperature between the medium and the sample.
It effectively reduces the impact of temperature difference on temperature-sensitive experiments, improves experimental precision and the accuracy of results, and ensures temperature uniformity.
Smart Images
Figure CN224524805U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of constant temperature bath technology, and in particular to a constant temperature bath with a sample holder rotation mechanism. Background Technology
[0002] A thermostat is a laboratory or industrial device that can precisely control and maintain a constant internal temperature. It is widely used in fields such as chemistry, biology, medicine, and materials science. During thermostat experiments, uneven temperature distribution caused by the fixed position of the sample has been a long-standing technical problem. Due to the physical limitations of heat conduction and heat convection, a temperature gradient inevitably forms in a static thermostat. This temperature stratification phenomenon is more pronounced, especially in traditional designs where the sample is fixed. When multiple samples are fixed in different positions, the temperature of the sample closer to the heating element tends to be higher, while the temperature of the sample farther from the heating source tends to be lower. This temperature difference can reach ±0 in precision experiments. Temperature differences of 1°C or even higher can severely affect the accuracy and repeatability of experimental results. For example, in temperature-sensitive experiments such as enzyme kinetics studies and material performance testing, such temperature differences may lead to significant deviations in reaction rates and even incorrect experimental conclusions. In addition, in culture experiments that require long-term constant temperature, continuous temperature inhomogeneity can also lead to inconsistent growth conditions between samples, which greatly reduces the reliability of comparative experimental data. This problem of temperature inhomogeneity caused by fixed sample positions has become one of the key factors restricting the improvement of the performance of constant temperature baths and the improvement of experimental accuracy. Therefore, a constant temperature bath with a sample holder rotation mechanism is proposed to address the above problems. Utility Model Content
[0003] The technical problem to be solved by this utility model overcomes the existing defects and can effectively solve the problems in the background art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A constant temperature bath with a sample holder rotation mechanism includes a constant temperature bath, a start switch fixedly connected to the top of the control mechanism of the constant temperature bath, a fixed plate fixedly connected to the top of the inner side of the constant temperature bath, a fixed shaft rotatably connected to one end of the inner side of the fixed plate and passing through the fixed plate, a turntable fixedly connected to the bottom end of the fixed shaft, drive shafts rotatably connected to both the left and right ends of the inner side of the turntable and passing through the turntable, an impeller fixedly connected to one end of the drive shaft, a rotating shaft rotatably connected to the top of the inner side of the turntable and passing through the turntable, a limit block fixedly connected to the top of the rotating shaft, and a sample holder in limiting contact with the top of the outer side of the limit block.
[0006] As a further improvement of this utility model, a driving bevel gear is fixedly connected to the outside of the drive shaft, and a driven bevel gear is meshed with the outside of the driving bevel gear, and the driven bevel gear is fixedly connected to the bottom of the rotating shaft.
[0007] As a further improvement of this utility model, a hook and loop fastener is fixedly connected to the top of the inner side of the limiting block, and a hook and loop fastener is adhered to the top of the hook and loop fastener, and the hook and loop fastener is fixedly connected to the sample holder.
[0008] As a further improvement of this utility model, a small bevel gear is fixedly connected to the other end of the drive shaft, a large bevel gear is meshed with the outer side of the small bevel gear, a fixed seat that passes through the turntable is fixedly connected to the bottom end of the large bevel gear, and the fixed seat is rotatably connected to the turntable. The bottom of the fixed seat is connected to the bottom of the inner side of the constant temperature bath by bolts.
[0009] As a further improvement of this utility model, a fixed cover that is fixedly connected to a fixed plate is rotatably connected to the top of the outer side of the fixed shaft, a gear is fixedly connected to the top of the fixed shaft, a rack is meshed with the outer side of the gear, a bracket that slides and limits the fixed cover is fixedly connected to the outer side of the rack, a spring is fixedly connected to the left end of the bracket, and the other end of the spring is fixedly connected to the fixed cover, a cam is contacted at the right end of the bracket, a motor is fixedly connected to the top of the cam, and the motor is fixedly connected to the fixed cover.
[0010] Compared with the prior art, the present invention has the following beneficial effects:
[0011] In precision temperature-sensitive experiments, by controlling the turntable to drive the sample holder and impeller to reciprocate, the medium is repeatedly disturbed, and the position of the sample holder containing test tubes or beakers is repeatedly adjusted. The horizontally set impeller is controlled to reciprocate, eliminating the temperature difference between the edge and center of the constant temperature bath. The sample holder drives the test tubes or beakers containing the samples to reciprocate, eliminating local temperature differences within the test tubes or beakers. This can improve the uniformity of the medium temperature in the constant temperature bath and the uniformity of the sample temperature during the experiment. In this way, the impact of temperature difference on the precision and accuracy of temperature-sensitive experiments can be minimized. Attached Figure Description
[0012] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0013] Figure 1 This is a schematic diagram of the overall structure of a constant temperature bath with a sample holder rotation mechanism according to the present invention.
[0014] Figure 2 This is a schematic diagram of the installation structure of a thermostatic bath impeller with a sample holder rotation mechanism according to the present invention.
[0015] Figure 3This is a schematic diagram of the installation structure of the hook and loop fastener of a constant temperature bath with a sample holder rotation mechanism according to this utility model.
[0016] Figure 4 This is a bottom view of the sample holder of a constant temperature bath with a sample holder rotation mechanism according to the present invention.
[0017] Figure 5 This is a cross-sectional view of a constant temperature bath turntable with a sample holder rotation mechanism according to the present invention.
[0018] Figure 6 This is a cross-sectional view of a constant temperature bath fixing cover with a sample rack rotation mechanism according to the present invention.
[0019] In the diagram: 1. Thermostatic bath; 2. Start switch; 3. Fixing plate; 4. Fixing shaft; 5. Turntable; 6. Drive shaft; 7. Impeller; 8. Driving bevel gear; 9. Driven bevel gear; 10. Rotating shaft; 11. Limiting block; 12. Sample holder; 13. Hook and loop fastener; 14. Hook and loop fastener; 15. Small bevel gear; 16. Large bevel gear; 17. Fixing base; 18. Fixing cover; 19. Gear; 20. Rack; 21. Support; 22. Spring; 23. Cam; 24. Motor. Detailed Implementation
[0020] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. All parts involving precision gear structures and rotating structures are provided with protective structures and sealing mechanisms, which will not be repeated in this application. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] Example 1
[0022] like Figure 1-6As shown, a constant temperature bath with a sample holder rotation mechanism includes a constant temperature bath 1. A start switch 2 is fixedly connected to the top of the control mechanism of the constant temperature bath 1. A fixed plate 3 is fixedly connected to the top of the inner side of the constant temperature bath 1. A fixed shaft 4 is rotatably connected to one end of the inner side of the fixed plate 3, penetrating the fixed plate 3. A turntable 5 is fixedly connected to the bottom end of the fixed shaft 4. A drive shaft 6 is rotatably connected to both the left and right ends of the inner side of the turntable 5, penetrating the turntable 5. An impeller 7 is fixedly connected to one end of the drive shaft 6. A rotating shaft 10 is rotatably connected to the top of the inner side of the turntable 5, penetrating the turntable 5. A limit block 11 is fixedly connected to the top of the rotating shaft 10. A sample holder 12 is limited and contacted at the top of the outer side of the limit block 11.
[0023] Furthermore, such as Figure 5 As shown, a drive bevel gear 8 is fixedly connected to the outside of the drive shaft 6, and a driven bevel gear 9 is meshed with the outside of the drive bevel gear 8. The driven bevel gear 9 is fixedly connected to the bottom of the rotating shaft 10. During the process of the drive shaft 6 driving the impeller 7 to rotate back and forth, the drive shaft 6 simultaneously drives the drive bevel gear 8 to reciprocate and mesh with the driven bevel gear 9. When the driven bevel gear 9 drives the sample holder 12 to rotate back and forth through the rotating shaft 10 and the limiting block 11, it is convenient to solve the problem of local temperature difference in the test tubes or beakers in the sample holder 12.
[0024] Furthermore, such as Figure 3-4 As shown, a hook and loop fastener 13 is fixedly connected to the top of the inner side of the limiting block 11, and a hook and loop fastener 14 is glued to the top of the hook and loop fastener 13. The hook and loop fastener 14 is fixedly connected to the sample holder 12. By connecting the sample holder 12 to the limiting block 11 at the top of the rotating shaft 10 through the adhesion of the hook and loop fastener 13 and the hook and loop fastener 14, it is convenient to disassemble and assemble the sample holder 12 for placing test tubes or beakers as needed.
[0025] Furthermore, such as Figure 2 , Figure 3 and Figure 5 As shown, a small bevel gear 15 is fixedly connected to the other end of the drive shaft 6. A large bevel gear 16 is meshed with the outer side of the small bevel gear 15. A fixed seat 17 that passes through the turntable 5 is fixedly connected to the bottom of the large bevel gear 16, and the fixed seat 17 is rotatably connected to the turntable 5. The bottom of the fixed seat 17 is connected to the bottom of the inner side of the constant temperature bath 1 by bolts. During the process of the turntable 5 driving the impeller 7 to revolve, the small bevel gear 15 continuously meshes with the large bevel gear 16 that is fixedly connected to the constant temperature bath 1 through the fixed seat 17. Furthermore, the drive shaft 6 drives the impeller 7 to rotate in both directions, which can continuously pull the medium around the constant temperature bath 1 towards the center and pull the medium in the center of the constant temperature bath 1 towards the periphery, thereby facilitating the solution of the temperature difference between the inner edge and the center of the constant temperature bath 1.
[0026] Furthermore, such as Figure 1, Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a fixed cover 18, which is fixedly connected to the fixed plate 3, is rotatably connected to the top of the outer side of the fixed shaft 4. A gear 19 is fixedly connected to the top of the fixed shaft 4. A rack 20 is meshed with the outer side of the gear 19. A bracket 21, which slides and limits the movement of the fixed cover 18, is fixedly connected to the outer side of the rack 20. A spring 22 is fixedly connected to the left end of the bracket 21, and the other end of the spring 22 is fixedly connected to the fixed cover 18. A cam 23 contacts the right end of the bracket 21, and a motor 2 is fixedly connected to the top of the cam 23. 4. The motor 24 is fixedly connected to the fixed cover 18. The motor 24 drives the cam 23 to rotate. The cam 23 pushes the bracket 21 to compress the spring 22. The bracket 21, in conjunction with the elastic force of the spring 22, drives the rack 20 to reciprocate and mesh with the gear 19. The gear 19 drives the turntable 5 to reciprocate through the fixed shaft 4. This facilitates the control of the turntable 5 to drive the impeller 7 to reciprocate and revolve through the drive shaft 6. This can avoid the formation of stable eddies in the constant temperature bath 1, which would lead to local overheating, and make the temperature uniformity in the constant temperature bath 1 better.
[0027] In this solution, all rotating shafts are connected using a sealed connection method in the prior art. This is prior art and not the focus of this application's improvement, so it will not be described in detail.
[0028] The principle of the precision temperature-sensitive experiment: Place the experimental sample in a test tube or beaker, then insert the test tube or beaker into the corresponding sample holder 12. Next, manually press the start switch 2 to activate the device. At this time, the motor 24 will drive the cam 23 to rotate. The cam 23 will reciprocate by pushing the bracket 21 to compress the spring 22. The restoring force of the bracket 21 and spring 22 will drive the rack 20 to reciprocate and mesh with the gear 19. The gear 19 will drive the turntable 5 to reciprocate and rotate via the fixed shaft 4. The turntable 5 will drive the impeller 7 to reciprocate and rotate via the drive shaft 6. Simultaneously, the sample holder 12 will reciprocate and rotate via the rotating shaft 10 and the limiting block 11. This achieves continuous disturbance of the medium and continuous adjustment of the sample position. During this process, the small bevel gear 15 will also continuously reciprocate and mesh. The large bevel gear 16 is fixedly connected to the constant temperature bath 1 via the fixed base 17. At this time, the small bevel gear 15 will also continuously drive the impeller 7 to rotate back and forth through the drive shaft 6. This can continuously pull the medium around the constant temperature bath 1 towards the center and pull the medium in the center of the constant temperature bath 1 towards the periphery, thus solving the problem of temperature difference between the inner edge and the center of the constant temperature bath 1. During the process of the impeller 7 rotating back and forth through the drive shaft 6, the drive shaft 6 will also drive the active bevel gear 8 to reciprocate and mesh with the driven bevel gear 9. Therefore, the driven bevel gear 9 will also drive the sample holder 12 to rotate back and forth through the rotating shaft 10 and the limiting block 11. This can solve the problem of local temperature difference in the test tubes or beakers in the sample holder 12, thereby improving the precision of temperature-sensitive experiments and the accuracy of experimental results.
[0029] The above are preferred embodiments of the present invention. The basic principles, main features, and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope thereof. All such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A thermostatic bath with a sample holder rotation mechanism, comprising a thermostatic bath (1), characterized in that: A start switch (2) is fixedly connected to the top of the control mechanism of the constant temperature bath (1). A fixed plate (3) is fixedly connected to the top of the inner side of the constant temperature bath (1). A fixed shaft (4) is rotatably connected to one end of the inner side of the fixed plate (3). A turntable (5) is fixedly connected to the bottom end of the fixed shaft (4). A drive shaft (6) is rotatably connected to both the left and right ends of the inner side of the turntable (5). An impeller (7) is fixedly connected to one end of the drive shaft (6). A rotating shaft (10) is rotatably connected to the top of the inner side of the turntable (5). A limit block (11) is fixedly connected to the top of the rotating shaft (10). A sample holder (12) is limited to the top of the outer side of the limit block (11).
2. The constant temperature bath with a sample holder rotation mechanism according to claim 1, characterized in that: The drive shaft (6) is fixedly connected to the outside of an active bevel gear (8), and the active bevel gear (8) is meshed with a driven bevel gear (9) on the outside of the drive bevel gear (8), and the driven bevel gear (9) is fixedly connected to the bottom of the rotating shaft (10).
3. A constant temperature bath with a sample holder rotation mechanism according to claim 1, characterized in that: The upper end of the inner side of the limiting block (11) is fixedly connected to a hook and loop fastener (13), and the upper end of the hook and loop fastener (13) is attached to a hook and loop rough surface (14), and the hook and loop rough surface (14) is fixedly connected to the sample holder (12).
4. A constant temperature bath with a sample holder rotation mechanism according to claim 1, characterized in that: The other end of the drive shaft (6) is fixedly connected to a small bevel gear (15), and a large bevel gear (16) is meshed with the outer side of the small bevel gear (15). The bottom end of the large bevel gear (16) is fixedly connected to a fixed seat (17) that passes through the turntable (5), and the fixed seat (17) is rotatably connected to the turntable (5). The bottom of the fixed seat (17) is connected to the bottom of the inner side of the constant temperature bath (1) by bolts.
5. A constant temperature bath with a sample holder rotation mechanism according to claim 1, characterized in that: The fixed shaft (4) is rotatably connected to the top of the outer side of the fixed cover (18) which is fixedly connected to the fixed plate (3). The top of the fixed shaft (4) is fixedly connected to the gear (19). The gear (19) is meshed with the rack (20) on the outer side. The rack (20) is fixedly connected to the outer side of the bracket (21) which slides and limits the fixed cover (18). The left end of the bracket (21) is fixedly connected to the spring (22), and the other end of the spring (22) is fixedly connected to the fixed cover (18). The right end of the bracket (21) contacts the cam (23). The top of the cam (23) is fixedly connected to the motor (24), and the motor (24) is fixedly connected to the fixed cover (18).