A thermostat water bath kettle

Abstract

The utility model discloses a constant temperature water bath, including the kettle body, install the article board in the kettle body, open the through -hole on the article board, the article board divides the kettle body into heating chamber and water bath chamber, be equipped with the heating -tube in the heating chamber, there are a plurality of support stages on the article board, and the support stage includes a plurality of groups arc boss, and a plurality of groups arc boss are by inside and outside elevation in the shape of steps, the limiting board in water bath chamber, the edge of limiting board is provided with height adjusting assembly to adjust the height of limiting board, and the limiting hole is opened on the limiting board, and the axis of limiting hole and arc boss is collinear, and there is clamping assembly on the limiting hole, and clamping assembly includes two V-shaped clamping plates, and two V-shaped clamping plates are close to each other to hold fixed container. The support stage formed by arc boss is used for bearing weight container, and the clearance between arc boss of same group accommodates the through -flow of water flow, and two V-shaped clamping plates are close to each other and hold the side wall of support container, can be compatible with a variety of container shapes, and the stability is better, also does not have the risk of loss.

Description

Technical Field

[0001] This utility model belongs to the field of laboratory equipment technology, specifically a constant temperature water bath. Background Technology

[0002] Thermostatic water baths are mainly used for heating glassware such as flasks in laboratories. The water in the water bath is heated to the required temperature by a heating device. Then, a container containing a solution is placed in the water. The heat from the hot water is transferred to the solution in the container through the container wall for indirect heating, so as to achieve a stable heat preservation or heating effect.

[0003] However, there are still some problems with the use of current constant temperature water baths. When using existing constant temperature water baths, the container is placed directly on the shelf. Especially when heating large-diameter containers, this can block the flow holes on the shelf, affecting the water flow on both sides of the shelf and causing uneven water temperature throughout the water bath. Existing constant temperature water baths use multiple layers of limiting rings to support the container. The inner limiting rings need to be manually removed to fit the diameter of the container, which is cumbersome and there is also a risk of losing the removed limiting rings. Utility Model Content

[0004] In view of the above-mentioned prior art, the present invention provides a constant temperature water bath. The support platform formed by the arc-shaped protrusions on the shelf is used to support the container. The bottom of the container is not placed directly on the shelf. The gap between the arc-shaped protrusions in the same group can accommodate the flow of water. The flow holes on the shelf can all participate in the convection of water, which facilitates the uniformity of water temperature in the water bath. The outer arc-shaped protrusions form a horizontal limit on the bottom of the container to prevent slippage. The two V-shaped clamping plates on the limiting plate are close to each other to clamp and support the side wall of the container. It can accommodate various container shapes, has better stability, and eliminates the risk of loss.

[0005] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows: A constant temperature water bath includes a pot body with a shelf installed inside. The shelf has flow holes and divides the pot body into a lower heating chamber and an upper water bath chamber. An electric heating tube is installed in the heating chamber. Several support platforms are installed on the upper surface of the shelf, each support platform including multiple sets of arc-shaped protrusions that rise in a stepped manner from the inside to the outside. A limit plate is installed in the water bath chamber, and a height adjustment component is provided on the edge of the limit plate to adjust its height. A limit hole is provided on the limit plate, and the limit hole is collinear with the axis of the arc-shaped protrusion. A clamping component is installed on the limit hole, and the clamping component includes two V-shaped clamping plates that are close to each other to clamp and fix the container.

[0006] Each group of arc-shaped protrusions has at least three arc-shaped protrusions, and each group of arc-shaped protrusions is arranged in a circular array, with gaps between adjacent arc-shaped protrusions.

[0007] Furthermore, the height adjustment component includes several height groove groups, which are formed on the inner wall of the pot body and distributed circumferentially along the inner wall of the pot body. The height groove groups include multiple support grooves, which are formed on the inner wall of the pot body along the axial direction of the pot body. A sleeve is installed on the upper surface of the limiting plate, and a sliding rod is slidably connected inside the sleeve. A spring is provided between the sleeve and the sliding rod. The end of the sliding rod away from the spring is inserted into different layers of support grooves to adjust the height of the limiting plate. A sliding groove is formed on the side wall of the sleeve along the axial direction of the sleeve. A lever is connected to the side wall of the sliding rod, and the lever passes through the sliding groove and slides inside the sliding groove.

[0008] Furthermore, a locking groove is formed on the side wall of the sleeve along the circumference of the sleeve. The locking groove is connected to the slide groove. One end of the spring is fixedly connected to the sleeve, and the other end of the spring is rotatably connected to the slide rod. The lever rotates around the axis of the slide rod to the locking groove to lock the slide rod in the sleeve.

[0009] Furthermore, the clamping assembly also includes a first U-shaped rod, a second U-shaped rod, and a fixing block. The fixing block is installed on the upper surface of the limiting plate, and a horizontal through slot is opened in the fixing block. The first U-shaped rod and the second U-shaped rod are arranged facing each other. The support arms of the first U-shaped rod and the second U-shaped rod pass through the through slot from both ends and are slidably connected to the fixing block. The support arms of the first U-shaped rod and the second U-shaped rod are provided with racks. A gear is rotatably connected in the through slot. The racks on the support arms of the first U-shaped rod and the second U-shaped rod clamp the gear and mesh with the gear. Two V-shaped clamping plates are installed in the middle of the first U-shaped rod and the second U-shaped rod, respectively. The V-shaped clamping plates are provided with staggered grooves so that the two V-shaped clamping plates can approach each other without obstruction.

[0010] Furthermore, the inner side of the V-shaped clamping plate is provided with an anti-slip silicone pad, and the surface of the silicone pad is provided with anti-slip texture.

[0011] Furthermore, a slider is fixedly connected to the second U-shaped rod, and a locking bolt is screwed onto the slider.

[0012] Furthermore, a rotating shaft is provided in the heating chamber. One end of the rotating shaft passes through the bottom wall of the pot and is rotatably connected to the pot. A propeller blade is connected to the rotating shaft. A base is installed at the bottom of the pot, and a motor is installed inside the base. The output end of the motor is connected to the rotating shaft.

[0013] Furthermore, the top of the pot body is equipped with a lid, and the top of the lid has an exhaust vent.

[0014] The beneficial effects of this utility model are as follows: the arc-shaped protrusions support the bottom of the container and bear the weight. The gap between the arc-shaped protrusions in the same group allows water to flow through, avoiding the container being placed directly on the shelf and blocking the flow hole, thus enhancing the water circulation efficiency. The arc-shaped protrusions on the outer ring can limit the container in the horizontal direction, improving the stability of the container. The upper middle part of the container passes through the limiting hole, and the two V-shaped clamping plates on the limiting hole clamp and support the outer wall of the container by approaching each other. It can accommodate various container shapes and has a wider range of adaptability.

[0015] A support groove is opened on the inner wall of the pot body. The sliding rod inside the sleeve is inserted into the support groove, thereby stably supporting the limiting plate in the pot body. The support groove is opened on the inner wall of the pot body along the axial direction of the pot body. By manually moving the lever, the sliding rod slides out of the sleeve and inserts into the support groove of different layers, thereby adjusting the height of the limiting plate to adapt to containers of different heights. Under the action of the spring force inside the sleeve, the sliding rod is continuously subjected to the action of sliding out of the sleeve, effectively preventing the sliding rod from accidentally retracting into the sleeve.

[0016] A locking groove is made on the sleeve. After the lever slides to the appropriate position in the groove, the lever rotates around the axis of the slide rod, that is, the lever rotates into the locking groove. At this time, the slide rod is locked and fixed in the sleeve. After processing each slide rod in turn, it is convenient to move the limiting plate for height adjustment, avoiding the need for continuous manual control of the lever and improving the convenience of operation.

[0017] Two opposing first U-shaped rods and second U-shaped rods move synchronously towards each other under the action of gears and racks. Eventually, the V-shaped clamping plates connected to the first U-shaped rods and second U-shaped rods move closer together to clamp and support the outer wall of the container, making the container more stable and compatible with various container shapes. The two V-shaped clamping plates have staggered grooves to form staggered teeth, so the two V-shaped clamping plates are not obstructed during the process of moving closer together. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of a constant temperature water bath according to the present invention; Figure 2 This is a cross-sectional view of a constant temperature water bath according to the present invention; Figure 3 for Figure 2 Enlarged view of the central A region; Figure 4 This is a schematic diagram of the constant temperature water bath sleeve structure of this utility model; Figure 5 This is a schematic diagram of the internal structure of a constant temperature water bath according to the present invention; Figure 6 for Figure 5 Enlarged view of the central B region.

[0019] Explanation of reference numerals: 1. Base; 2. Pot body; 3. Pot lid; 4. Vent; 5. Locking slot; 6. Motor; 7. Heating element; 8. Shelf; 9. Flow hole; 10. Limiting plate; 11. Arc-shaped boss; 12. Support groove; 13. Sleeve; 14. Spring; 15. Slide rod; 16. Propeller blade; 17. Rotating shaft; 18. First U-shaped rod; 19. Second U-shaped rod; 20. Limiting hole; 21. Fixing block; 22. Rack; 23. Gear; 24. V-shaped clamping plate; 25. Interlaced groove; 26. Through groove; 27. Locking bolt; 28. Toggle lever; 29. ​​Slide groove. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0021] Combined with reference to the appendix Figures 1 to 6This utility model provides a constant temperature water bath, including a pot body 2, a shelf 8 installed inside the pot body 2, a flow hole 9 on the shelf 8, the shelf 8 divides the pot body 2 into a lower heating chamber and an upper water bath chamber, an electric heating tube 7 is installed in the heating chamber, a number of support platforms are installed on the upper surface of the shelf 8, the support platforms include multiple sets of arc-shaped protrusions 11, the multiple sets of arc-shaped protrusions 11 rise from the inside to the outside in a stepped manner, a limiting plate 10 is installed in the water bath chamber, the edge of the limiting plate 10 is provided with a height adjustment component, the height adjustment component is used to adjust the height of the limiting plate 10, a limiting hole 20 is opened on the limiting plate 10, the limiting hole 20 is collinear with the axis of the arc-shaped protrusion 11, a clamping component is installed on the limiting hole 20, the clamping component includes two V-shaped clamping plates 24, the two V-shaped clamping plates 24 are close to each other to clamp and fix the container. The heating element 7 in the heating chamber below the shelf 8 heats the water in the pot 2 into hot water. The hot water mixes with the cold water above the shelf 8 through the flow hole 9, making the water temperature uniform throughout the pot 2 and preventing the container from directly contacting the heating element 7, thus improving safety. The container is placed on the support platform, with the bottom of the container supported by the arc-shaped protrusion 11. There is a gap between the arc-shaped protrusions 11 in the same group. The hot water below the shelf 8 enters the area between the container and the shelf 8 through the flow hole 9, and then flows to other areas through the gap between the arc-shaped protrusions 11 in the same group. If the bottom of the container is placed directly on the shelf 8, it will block the flow hole 9, reducing the water circulation efficiency above and below the shelf 8. Then, the limiting plate 10 is adjusted and fixed to a suitable height, and the upper middle part of the container passes through the limiting hole 20. The two V-shaped clamping plates 24 are close to each other to clamp the upper middle part of the support column of the container, further improving the stability of the container.

[0022] Preferably, each group of arc-shaped protrusions 11 has at least three arc-shaped protrusions 11, and each group of arc-shaped protrusions 11 is arranged in a circular array, with gaps between adjacent arc-shaped protrusions 11. The three arc-shaped protrusions 11 arranged in a circular array form a circular support plane. Multiple support planes rise from the inside to the outside, supporting the bottom of containers of different diameters. Gaps are left between the arc-shaped protrusions 11 that form the same support plane, so that water entering from the flow hole 9 at the bottom of the container can flow out to other areas through the gaps. When the container is placed on the support platform on the shelf 8, it will not block part of the flow hole 9 and affect the flow efficiency of water flowing up and down the shelf 8.

[0023] Preferably, the height adjustment assembly includes several height groove groups, which are formed on the inner wall of the pot body 2 and distributed circumferentially along the inner wall of the pot body 2. The height groove groups include multi-layer support grooves 12, which are formed on the inner wall of the pot body 2 along the axial direction. A sleeve 13 is installed on the upper surface of the limiting plate 10. A slide rod 15 is slidably connected inside the sleeve 13. A spring 14 is provided between the sleeve 13 and the slide rod 15. The end of the slide rod 15 away from the spring 14 is inserted into the support grooves 12 of different layers to adjust the height of the limiting plate 10. A sliding groove 29 is formed on the side wall of the sleeve 13 along the axial direction of the sleeve 13. A lever 28 is connected to the side wall of the slide rod 15. The lever 28 passes through the sliding groove 29 and slides inside the sliding groove 29. When the height of the limiting plate 10 needs to be adjusted, manually move the lever 28. The lever 28 slides in the slide groove 29, and the slide rod 15 slides in the sleeve 13 until the slide rod 15 disengages from the support groove 12. The limiting plate 10 can then move up and down. After the limiting plate 10 moves to the appropriate height according to the height of the container, release the lever 28. Under the elastic force of the spring 14 in the sleeve 13, the slide rod 15 slides out of the sleeve 13 and inserts into the support groove 12. There are multiple slide rods 15 on the upper surface edge of the limiting plate 10, which are inserted into the corresponding support grooves 12 to support and fix the limiting plate 10. Under the elastic force of the spring 14, the slide rod 15 will not accidentally retract into the sleeve 13, or be inserted too shallowly into the support groove 12 due to carelessness, which would lead to the risk of the limiting plate 10 falling.

[0024] Preferably, a locking groove 5 is formed on the side wall of the sleeve 13 along the circumferential direction of the sleeve 13. The locking groove 5 is connected to the sliding groove 29. One end of the spring 14 is fixedly connected to the sleeve 13, and the other end of the spring 14 is rotatably connected to the sliding rod 15. The lever 28 rotates around the axis of the sliding rod 15 to the locking groove 5 to lock the sliding rod 15 into the sleeve 13. In order to ensure the stability of the limiting plate 10, at least three sets of sliding rods 15 are required on the limiting plate 10. When adjusting the height of the limiting plate 10, it is troublesome to retract all the sliding rods 15 into the sleeve at the same time. Therefore, a locking groove 5 is formed on the side wall of the sleeve 13. The locking groove 5 is connected to the sliding groove 29. That is, the locking groove 5 is formed near the moving trajectory of the lever 28. When the lever 28 is manually moved to slide in the sliding groove 29 until the end of the sliding rod 15 is completely separated from the support groove 12, the lever 28 moves to the locking groove 5. Because the spring 14 The other end is rotatably connected to the slide rod 15. The slide rod 15 is cylindrical. The lever 28 can rotate around the axis of the slide rod 15. The lever 28 rotates into the locking groove 5. The side wall of the sleeve 13 limits and locks the lever 28. All the slide rods 15 are sequentially retracted into the sleeve 13 and limited and locked. After the limiting plate 10 is moved to a suitable height, the lever 28 is reversed and rotated into the slide groove 29. Under the action of the spring 14, the slide rod 15 automatically pops out and inserts into the support groove 12, thereby fixing the limiting plate 10.

[0025] Preferably, the clamping assembly further includes a first U-shaped rod 18, a second U-shaped rod 19, and a fixing block 21. The fixing block 21 is installed on the upper surface of the limiting plate 10. A horizontal through groove 26 is provided in the fixing block 21. The first U-shaped rod 18 and the second U-shaped rod 19 are arranged facing each other. The arms of the first U-shaped rod 18 and the second U-shaped rod 19 pass through the through groove 26 from both ends and are slidably connected to the fixing block 21. A rack 22 is provided on the arms of the first U-shaped rod 18 and the second U-shaped rod 19. A gear 23 is rotatably connected in the through groove 26. The rack 22 on the arms of the first U-shaped rod 18 and the second U-shaped rod 19 clamps the gear 23 and meshes with the gear 23. Two V-shaped clamping plates 24 are installed in the middle of the first U-shaped rod 18 and the second U-shaped rod 19, respectively. An interlaced groove 25 is provided on the V-shaped clamping plates 24 so that the two V-shaped clamping plates 24 can approach each other without obstruction. After adjusting the limiting plate 10 to a suitable height, the upper middle part of the container passes through the limiting hole 20. The support arms of the opposing first U-shaped rod 18 and second U-shaped rod 19 are restricted by the through groove 26 to move only horizontally. The racks 22 on the support arms of the first U-shaped rod 18 and second U-shaped rod 19 clamp the gear 23 and mesh with the gear 23, so that the first U-shaped rod 18 and second U-shaped rod 19 move synchronously towards each other, reducing operation steps, saving time, and also avoiding the center of clamping shift due to asynchronous movement of the first U-shaped rod 18 and second U-shaped rod 19, which would cause the container to tilt after clamping. Both arms of the two U-shaped rods 19 are connected by a rack 22 and a gear 23 to move synchronously in opposite directions, improving the stability of the movement of the first U-shaped rod 18 and the second U-shaped rod 19. Two V-shaped clamping plates 24 are respectively installed in the middle of the first U-shaped rod 18 and the second U-shaped rod 19. The V-shaped clamping plates 24 are provided with staggered grooves 25 to form staggered teeth. When the two V-shaped clamping plates 24 approach each other, the staggered teeth on the two V-shaped clamping plates 24 pass through each other without obstructing each other. Therefore, the height of the two V-shaped clamping plates 24 is consistent, effectively avoiding the container being subjected to shear force due to the two V-shaped clamping plates 24 staggering vertically.

[0026] Preferably, the inner side of the V-shaped clamping plate 24 is provided with an anti-slip silicone pad, and the surface of the silicone pad is provided with anti-slip texture. This prevents the container supported by the V-shaped clamping plate 24 from slipping, and the soft properties of the silicone pad effectively prevent clamping damage to the side wall of the container.

[0027] Preferably, a slider is fixedly connected to the second U-shaped rod 19, and a locking bolt 27 is screwed onto the slider. After moving the first U-shaped rod 18 and the second U-shaped rod 19 to clamp the container with the two V-shaped clamping plates 24, tightening the locking bolt 27 increases the friction with the limiting plate 10, so that the first U-shaped rod 18 and the second U-shaped rod 19 are moved stably in a fixed position, ensuring the stability of the clamping by the two V-shaped clamping plates 24 and preventing the container from being loosened due to shaking.

[0028] Preferably, a rotating shaft 17 is provided in the heating chamber. One end of the rotating shaft 17 passes through the bottom wall of the pot body 2 and is rotatably connected to the pot body 2. A propeller blade 16 is connected to the rotating shaft 17. A base 1 is installed at the bottom of the pot body 2, and a motor 6 is installed in the base 1. The output end of the motor 6 is connected to the rotating shaft 17. The motor 6 on the base 1 drives the rotating shaft 17 to rotate. The rotating shaft 17 passes through the bottom wall of the pot body 2 and is rotatably connected to the pot body 2 through a sealed bearing. The rotating shaft 17 drives the propeller blade 16 to rotate. The rotating shaft 17 is located at the bottom center of the pot body 2. The rotation of the propeller blade 16 pushes the hot water below the shelf 8 to rise and enter the water bath chamber through the flow hole 9. When the propeller blade 16 rotates, the edge of the heating chamber below the shelf 8 is attracted to flow towards the center, forming a lower pressure. Then, the cold water above the shelf 8 enters the heating chamber through the flow hole 9 at the edge of the shelf 8, thus forming a circulation and further improving the uniformity of the water temperature.

[0029] Preferably, the top of the pot body 2 is provided with a pot lid 3, and the top of the pot lid 3 has an exhaust hole 4. The pot lid 3, which is provided with heat preservation, avoids heat loss and energy waste, and helps the water in the pot body 2 to reach the required temperature more quickly and stably. The exhaust hole 4 can effectively stabilize the air pressure in the pot body 2, and prevent water vapor from accumulating in the pot body 2, which would cause the pressure to rise and thus affect the stability of the water temperature.

[0030] Working principle: Based on the height of the container, the sliding rod 15 is first retracted into the sleeve 13. After the limiting plate 10 is moved to a suitable height, under the elastic force of the spring 14, the end of the sliding rod 15 is stably inserted into the support groove 12. Multiple sliding rods 15 provide stable fixed support for the limiting plate 10. The container filled with solution passes through the limiting hole 20 on the limiting plate 10 and is placed on the arc-shaped boss 11. The outer arc-shaped boss 11 provides horizontal limiting and fixing for the bottom of the container. Then, the second U-shaped rod 19 moves towards the center of the limiting hole 20, and the first U-shaped rod 18 moves synchronously in opposite directions. The two V-shaped clamps... The holding plates 24 are brought close together and clamp and support the outer wall of the upper part of the container, providing stable support and fixation for the container. Then, the locking bolt 27 is tightened, and the first U-shaped rod 18 and the second U-shaped rod 19 are fixed and cannot move relative to each other. The motor 6 on the base 1 is started, and the motor 6 drives the propeller blade 16 to rotate, pushing the hot water heated by the heating tube 7 upward through the flow hole 9 in the middle of the shelf plate 8 and into the water bath chamber above the shelf plate 8. The low-temperature cold water passes through the flow hole 9 at the edge of the shelf plate 8 and enters the heating chamber, where it is heated by the heating tube 7 and then enters the subsequent circulation, so that the water temperature in the entire pot body 2 is uniform.

[0031] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the protection scope of the stated claims.

Claims

1. A constant temperature water bath, characterized in that: The container includes a pot body (2), inside which a shelf (8) is installed. The shelf (8) has a flow hole (9) and divides the pot body (2) into a lower heating chamber and an upper water bath chamber. An electric heating tube (7) is installed in the heating chamber. Several support platforms are installed on the upper surface of the shelf (8). Each support platform includes multiple sets of arc-shaped protrusions (11), which rise in a stepped manner from the inside out. The water bath chamber... A limiting plate (10) is installed inside. A height adjustment component is provided on the edge of the limiting plate (10). The height adjustment component is used to adjust the height of the limiting plate (10). A limiting hole (20) is opened on the limiting plate (10). The limiting hole (20) is collinear with the axis of the arc-shaped boss (11). A clamping component is installed on the limiting hole (20). The clamping component includes two V-shaped clamping plates (24). The two V-shaped clamping plates (24) are close to each other to clamp and fix the container.

2. The constant temperature water bath according to claim 1, characterized in that: Each group of arc-shaped protrusions (11) has at least three arc-shaped protrusions (11), and each group of arc-shaped protrusions (11) is arranged in a ring array, with gaps between adjacent arc-shaped protrusions (11).

3. A constant temperature water bath according to claim 1, characterized in that: The height adjustment assembly includes several height groove groups, which are opened on the inner wall of the pot body (2) and distributed circumferentially along the inner wall of the pot body (2). The height groove group includes multiple support grooves (12), which are opened along the axial direction of the pot body (2) on the inner wall of the pot body (2). A sleeve (13) is installed on the upper surface of the limiting plate (10). A slide rod (15) is slidably connected in the sleeve (13). A spring (14) is provided between the sleeve (13) and the slide rod (15). The end of the slide rod (15) away from the spring (14) is inserted into the support grooves (12) of different layers to adjust the height of the limiting plate (10). A slide groove (29) is opened on the side wall of the sleeve (13) along the axial direction of the sleeve (13). A lever (28) is connected to the side wall of the slide rod (15). The lever (28) passes through the slide groove (29) and slides in the slide groove (29).

4. A constant temperature water bath according to claim 3, characterized in that: The sleeve (13) has a locking groove (5) on its side wall along the circumference of the sleeve (13). The locking groove (5) is connected to the slide groove (29). One end of the spring (14) is fixedly connected to the sleeve (13), and the other end of the spring (14) is rotatably connected to the slide rod (15). The lever (28) rotates around the axis of the slide rod (15) to the locking groove (5) to lock the slide rod (15) in the sleeve (13).

5. A constant temperature water bath according to claim 1, characterized in that: The clamping assembly further includes a first U-shaped rod (18), a second U-shaped rod (19), and a fixing block (21). The fixing block (21) is installed on the upper surface of the limiting plate (10). A horizontal through groove (26) is provided in the fixing block (21). The first U-shaped rod (18) and the second U-shaped rod (19) are arranged facing each other. The arms of the first U-shaped rod (18) and the second U-shaped rod (19) pass through the through groove (26) from both ends and are slidably connected to the fixing block (21). The first U-shaped rod (18) Both the first U-shaped rod (18) and the second U-shaped rod (19) are provided with racks (22), and gears (23) are rotatably connected in the through groove (26). The racks (22) on the first U-shaped rod (18) and the second U-shaped rod (19) clamp the gears (23) and mesh with them. The two V-shaped clamping plates (24) are respectively installed in the middle of the first U-shaped rod (18) and the second U-shaped rod (19). The V-shaped clamping plates (24) are provided with staggered grooves (25) so that the two V-shaped clamping plates (24) can approach each other without obstruction.

6. A constant temperature water bath according to claim 5, characterized in that: The inner side of the V-shaped clamping plate (24) is provided with an anti-slip silicone pad, and the surface of the silicone pad is provided with anti-slip texture.

7. A constant temperature water bath according to claim 5, characterized in that: A slider is fixedly connected to the second U-shaped rod (19), and a locking bolt (27) is screwed onto the slider.

8. A constant temperature water bath according to claim 1, characterized in that: The heating chamber is provided with a rotating shaft (17), one end of which passes through the bottom wall of the pot body (2) and is rotatably connected to the pot body (2). A propulsion blade (16) is connected to the rotating shaft (17). A base (1) is installed at the bottom of the pot body (2). A motor (6) is installed in the base (1). The output end of the motor (6) is connected to the rotating shaft (17).

9. A constant temperature water bath according to claim 1, characterized in that: The top of the pot body (2) is provided with a pot lid (3), and the top of the pot lid (3) is provided with an exhaust hole (4).

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