An electric heater assembly and a molten salt storage tank

Abstract

This utility model relates to the technical field of electric heaters, and in particular to an electric heater assembly and a molten salt storage tank, comprising: a mounting bracket, independently fixedly installed; a threaded tube, rotatably installed in the shaft hole of the mounting bracket, with a threaded rod fitted inside the threaded tube; a stirring shaft, coaxially installed on the threaded rod, with multiple stirring blades equidistantly arranged on the stirring shaft; a guide frame, set on the mounting bracket, with a movable component installed on the guide frame in the extension direction, the moving trajectory of the movable component being parallel to the axis of the threaded rod, and the threaded rod rotatably installed on the movable component; a servo motor, installed on the movable component, with the output end of the servo motor coaxially installed with the threaded rod; and a transmission mechanism, connected to the movable component and the mounting bracket respectively, the transmission mechanism being used to drive the threaded tube to rotate via the threaded rod; which increases the uniform mixing of materials and efficient heat exchange.

Description

Technical Field

[0001] This utility model relates to the technical field of electric heaters, and in particular to an electric heater assembly and a molten salt storage tank. Background Technology

[0002] With the development of renewable energy technologies, especially the increasing demand for efficient energy storage media in solar thermal power generation systems, molten salt, as an ideal high-temperature energy storage material, is widely used due to its excellent thermal stability and high energy density. In molten salt storage tank systems, electric heaters are key equipment for maintaining the temperature of molten salt and ensuring its fluidity during shutdown; their performance directly affects the operating efficiency and safety of the entire system.

[0003] Currently, the design of molten salt storage tanks emphasizes structural optimization and insulation measures to reduce heat loss and enhance overall stability. For example, the main structure of the tank is made of stainless steel or carbon steel and equipped with a multi-layer insulation layer composed of refractory bricks and foam glass. A concrete-embedded steel pipe ventilation layer is also used to prevent overheating. Furthermore, an immersion electric heater is installed at the bottom of the tank, and automated management is achieved through a self-measuring and control system to ensure precise control of the molten salt temperature. However, in practical applications, as an auxiliary component in traditional electric heaters, the stirring mechanism typically only provides stirring or heating in one direction, making it difficult to meet the requirements of uniform material mixing and efficient heat exchange under complex working conditions. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the present invention provides an electric heater assembly and a molten salt storage tank.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model discloses an electric heater assembly, comprising:

[0007] Mounting bracket, independently fixed installation;

[0008] A threaded tube is rotatably installed in the shaft hole of the mounting bracket, and a threaded rod is fitted inside the threaded tube.

[0009] The stirring shaft is coaxially mounted on the threaded rod, and multiple stirring blades are equidistantly arranged on the stirring shaft.

[0010] A guide frame is mounted on a mounting frame. A movable component is mounted on the guide frame in the extension direction. The movement trajectory of the movable component is parallel to the axis of the threaded rod. The threaded rod is rotatably mounted on the movable component.

[0011] The servo motor is mounted on the moving part, and the output end of the servo motor is coaxially mounted with the threaded rod.

[0012] The transmission mechanism is connected to the moving part and the mounting bracket respectively. The transmission mechanism is used to drive the threaded tube to rotate.

[0013] Furthermore, the transmission mechanism includes:

[0014] The drive shaft is rotatably mounted on the mounting bracket, and the drive shaft is arranged parallel to the rotation axis of the threaded rod.

[0015] The transmission shaft is rotatably installed in the through hole of the moving part. The axis of the drive shaft coincides with that of the transmission shaft. The drive shaft drives the transmission shaft to rotate synchronously. The transmission shaft is slidably installed along the length of the drive shaft.

[0016] Two transmission gears are coaxially mounted on the transmission shaft and the threaded rod, respectively, and the two transmission gears are meshed together.

[0017] The connecting mechanism is mounted on the drive shaft and is used to drive the drive shaft to rotate via the threaded pipe.

[0018] The adjustment mechanism, mounted on the drive shaft, is used to adjust the connection position between the connecting mechanism and the drive shaft.

[0019] Furthermore, the connecting mechanism includes:

[0020] A hollow shaft is slidably mounted on the drive shaft along its length, and a first gear and a second gear are coaxially mounted on the hollow shaft.

[0021] The third gear is coaxially mounted on the threaded pipe. The third gear meshes with the first gear. When the third gear meshes with the first gear, the transmission ratio is not 1:1.

[0022] The fourth gear is coaxially mounted on the threaded pipe. The fourth gear meshes with the second gear, and the transmission ratio is 1:1 when the second gear meshes with the fourth gear.

[0023] Furthermore, at most one pair of gears can simultaneously engage with the first gear and the second gear, and the third gear can engage with the first gear and the fourth gear.

[0024] Furthermore, when the second gear meshes with the fourth gear, the threaded rod and the threaded tube rotate at the same speed, and the height of the stirring paddle remains unchanged while stirring.

[0025] When the third gear meshes with the first gear, the threaded rod and the threaded tube rotate at different speeds, and the height of the stirring paddle rises / falls slowly to stir.

[0026] Furthermore, the regulatory body includes:

[0027] The adjusting shaft is rotatably mounted inside the shaft cavity of the transmission shaft, and both the bottom and top ends of the adjusting shaft are provided with external threads;

[0028] The connector is slidably installed in the inner cavity of the drive shaft and connected to the hollow shaft. The connector is connected to the external thread of the adjusting shaft.

[0029] The nut is installed on the external thread at the top of the adjusting shaft. The nut is used to lock the connection between the adjusting shaft and the drive shaft.

[0030] Furthermore, an adjusting cap is coaxially mounted on the adjusting shaft, and an anti-slip groove is provided at the edge of the adjusting cap.

[0031] Furthermore, an isolation box is installed on the mounting frame, and the transmission mechanism is located inside the isolation box.

[0032] A molten salt storage tank employs the electric heater assembly of this utility model.

[0033] In the above technical solution, the electric heater assembly and molten salt storage tank provided by this utility model have the following beneficial effects:

[0034] The mounting frame provides stable support for all components. The servo motor drives the threaded rod to rotate, which in turn drives the threaded tube to rotate synchronously under the action of the transmission mechanism. When the threaded rod and the threaded tube rotate at the same speed, the stirring shaft and the stirring paddle only rotate, and the height position remains unchanged, which can be used for concentrated stirring of specific areas. When the two rotate at different speeds, the screw pair structure is used to move the threaded rod axially, which drives the moving parts to rise and fall synchronously along the guide frame. This allows the stirring paddle to slowly rise and fall while rotating, expanding the stirring range and ensuring that the material is heated evenly. The guide frame restricts the movement trajectory of the moving parts and ensures that the axial movement of the threaded rod is smooth. The overall structure controls the rising and falling and rotation of the stirring paddle through the speed difference, replacing the traditional single motion mode, improving stirring efficiency and material mixing effect, adapting to different heating conditions, and enhancing the stability and uniformity of the electric heating process. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the embodiments will be briefly described below.

[0036] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0037] Figure 2 This is a schematic diagram of the axial side structure of this utility model;

[0038] Figure 3 This is a schematic diagram of the connection mechanism structure of this utility model;

[0039] Figure 4 This is a partial structural schematic diagram of the present invention;

[0040] Figure 5 This is an exploded view of the adjustment mechanism of this utility model;

[0041] The attached diagram shows the following markings: 1. Mounting bracket; 2. Threaded pipe; 3. Threaded rod; 4. Stirring shaft; 5. Stirring paddle; 6. Guide frame; 7. Moving part; 8. Servo motor; 9. Transmission mechanism; 91. Transmission shaft; 92. Conducting shaft; 93. Transmission gear; 94. Connecting mechanism; 94a. Hollow shaft; 94b. First gear; 94c. Second gear; 94d. Third gear; 94e. Fourth gear; 95. Adjusting mechanism; 95a. Adjusting shaft; 95b. Connecting part; 95c. Nut; 95d. Adjusting cap; 10. Isolation box. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0043] like Figures 1 to 5 As shown;

[0044] An electric heater assembly according to an embodiment of the present invention includes:

[0045] Mounting bracket 1 is the auxiliary foundation support structure for the entire electric heater assembly, and is independently fixed on the equipment housing;

[0046] The threaded tube 2 is rotatably installed in the shaft hole of the mounting bracket 1. As one of the core components of the power transmission, the threaded tube 2 is fitted with a threaded rod 3, forming a helical pair structure with it.

[0047] A stirring shaft 4 is coaxially mounted on a threaded rod 3, and multiple stirring paddles 5 are equidistantly arranged on the stirring shaft 4.

[0048] Guide frame 6 is mounted on mounting frame 1. A movable part 7 is mounted on guide frame 6 in the extension direction. The moving trajectory of movable part 7 is parallel to the axis of threaded rod 3. Threaded rod 3 is rotatably mounted on movable part 7.

[0049] Servo motor 8 is mounted on moving part 7. The output end of servo motor 8 is coaxially mounted with threaded rod 3 to provide rotational power to it.

[0050] The transmission mechanism 9 is connected to the movable part 7 and the mounting bracket 1 respectively. The transmission mechanism 9 is used to drive the threaded rod 3 to rotate the threaded tube 2.

[0051] By adopting the above technical solution, the mounting frame 1 provides stable support for each component. The servo motor 8 drives the threaded rod 3 to rotate, and under the action of the transmission mechanism 9, it drives the threaded tube 2 to rotate synchronously. When the speed of the threaded rod 3 and the threaded tube 2 is the same, the stirring shaft 4 and the stirring paddle 5 only rotate, and the height position remains unchanged. This allows for concentrated stirring of a specific area. When the speeds of the two are different, the screw pair structure is used to move the threaded rod 3 axially, driving the moving part 7 to rise and fall synchronously along the guide frame 6. This allows the stirring paddle 5 to slowly rise and fall while rotating, expanding the stirring range and ensuring that the material is heated evenly. The guide frame 6 restricts the movement trajectory of the moving part 7, ensuring that the axial movement of the threaded rod 3 is stable. The overall structure controls the rising and falling and rotation of the stirring paddle 5 through the speed difference, replacing the traditional single motion mode, improving stirring efficiency and material mixing effect, adapting to different heating conditions, and enhancing the stability and uniformity of the electric heating process.

[0052] As a preferred embodiment of the above technical solution, such as Figures 1 to 5 As shown, the transmission mechanism 9 includes:

[0053] The drive shaft 91 is rotatably mounted on the mounting bracket 1, and the drive shaft 91 is arranged parallel to the rotation axis of the threaded rod 3.

[0054] The transmission shaft 92 is rotatably installed in the through hole of the movable part 7. The axes of the drive shaft 91 and the transmission shaft 92 coincide. The drive shaft 91 drives the transmission shaft 92 to rotate synchronously. The transmission shaft 92 is slidably installed along the length of the drive shaft 91.

[0055] Two transmission gears 93 are coaxially mounted on the transmission shaft 92 and the threaded rod 3, respectively, and the two transmission gears 93 are meshed together.

[0056] The connecting mechanism 94 is mounted on the drive shaft 91. The connecting mechanism 94 is used to drive the drive shaft 91 to rotate through the threaded tube 2.

[0057] An adjustment mechanism 95 is mounted on the drive shaft 91. The adjustment mechanism 95 is used to adjust the connection position between the connecting mechanism 94 and the drive shaft 91.

[0058] In this embodiment, the drive shaft 91 is parallel to the axis of the threaded rod 3, providing precise rotational support for the transmission shaft 92. The axes of the transmission shaft 92 and the drive shaft 91 coincide and can slide along their length, ensuring that when the moving part 7 drives the transmission shaft 92 to rise and fall, the power of the drive shaft 91 can be continuously transmitted to the transmission shaft 92. With the cooperation of two meshing transmission gears 93, the power is transmitted from the threaded rod 3 to the transmission shaft 92, ensuring the coordinated rotation of the threaded rod 3 and the threaded tube 2. The connecting mechanism 94 enables the drive shaft 91 to drive the threaded tube 2 to rotate, forming a closed-loop transmission. The adjusting mechanism 95 can adjust the connection position between the connecting mechanism 94 and the drive shaft 91, thereby changing the transmission ratio and realizing flexible control of the speed difference between the threaded rod 3 and the threaded tube 2, meeting the needs of different lifting and lowering speeds of the stirring paddle 5 and adapting to the stirring needs under different heating conditions.

[0059] As a preferred embodiment of the above technical solution, such as Figures 1 to 5 As shown, the connecting mechanism 94 includes:

[0060] A hollow shaft 94a is slidably mounted on the transmission shaft 91 along the length direction of the transmission shaft 91. A first gear 94b and a second gear 94c are coaxially mounted on the hollow shaft 94a.

[0061] The third gear 94d is coaxially mounted on the threaded tube 2. The third gear 94d meshes with the first gear 94b. When the third gear 94d meshes with the first gear 94b, the transmission ratio is not 1:1.

[0062] The fourth gear 94e is coaxially mounted on the threaded tube 2. The fourth gear 94e meshes with the second gear 94c. When the second gear 94c meshes with the fourth gear 94e, the transmission ratio is 1:1.

[0063] At most one pair of the third gear 94d and the first gear 94b and the fourth gear 94e and the second gear 94c can be engaged at the same time.

[0064] When the second gear 94c meshes with the fourth gear 94e, the threaded rod 3 and the threaded tube 2 rotate at the same speed, and the height position of the stirring paddle 5 remains unchanged for stirring.

[0065] When the third gear 94d meshes with the first gear 94b, the threaded rod 3 and the threaded tube 2 rotate at different speeds, and the height of the stirring paddle 5 rises / falls slowly to stir.

[0066] In this embodiment, the hollow shaft 94a slides along the transmission shaft 91, which can drive the first gear 94b and the second gear 94c to selectively mesh with the third gear 94d and the fourth gear 94e. When the second gear 94c and the fourth gear 94e mesh with a 1:1 transmission ratio, the threaded rod 3 and the threaded tube 2 rotate at the same speed, and the stirring paddle 5 maintains a fixed height for stirring, which is suitable for working conditions that require concentrated stirring. When the first gear 94b and the third gear 94d mesh with a non-1:1 transmission ratio, the threaded rod 3 and the threaded tube 2 generate a speed difference, so that the stirring paddle 5 slowly rises and falls while rotating, expanding the stirring range and improving the uniformity of the material. The design that the two sets of gears do not mesh at the same time avoids transmission interference and ensures smooth switching. This structure achieves rapid switching between two stirring modes through precise control of the gear transmission ratio. It is easy to operate and has stable transmission, adapting to the material stirring needs under different heating conditions and enhancing the practicality and stirring efficiency of the electric heater assembly.

[0067] As a preferred embodiment of the above technical solution, such as Figures 1 to 5 As shown, the adjustment mechanism 95 includes:

[0068] The adjusting shaft 95a is rotatably mounted inside the shaft cavity of the transmission shaft 91. Both the bottom and top ends of the adjusting shaft 95a are provided with external threads.

[0069] The connector 95b is slidably installed in the inner cavity of the drive shaft 91 and connected to the hollow shaft 94a. The connector 95b is connected to the external thread of the adjusting shaft 95a.

[0070] Nut 95c is installed on the external thread at the top of the adjusting shaft 95a. Nut 95c is used to lock the connection position between the adjusting shaft 95a and the transmission shaft 91.

[0071] An adjusting cap 95d is coaxially mounted on the adjusting shaft 95a, and an anti-slip groove is provided on the edge of the adjusting cap 95d.

[0072] In this embodiment, the adjusting shaft 95a is rotatably mounted in the shaft cavity of the transmission shaft 91 and has external threads at both ends. It engages with the threaded connection of the connecting piece 95b, so that when the adjusting shaft 95a is rotated, the connecting piece 95b and the hollow shaft 94a can slide along the transmission shaft 91, precisely controlling the meshing and switching of the first gear 94b, the second gear 94c, the third gear 94d, and the fourth gear 94e. The anti-slip groove on the edge of the adjusting cap 95d makes it easier for the operator to apply force to rotate the adjusting shaft 95a, improving the convenience of adjustment. After adjustment, the nut 95c locks the relative position of the adjusting shaft 95a and the transmission shaft 91, preventing the hollow shaft 94a from shifting due to vibration or other factors, which could cause the gear meshing to loosen, thus ensuring stable transmission. This structure achieves high precision adjustment through threaded transmission, and the locking function ensures the reliable operation of the connecting mechanism 94, making the switching of the stirring mode precise and efficient.

[0073] As a preferred embodiment of the above technical solution, such as Figure 1As shown, an isolation box 10 is provided on the mounting frame 1, and the transmission mechanism 9 is located inside the isolation box 10;

[0074] In this embodiment, the isolation box 10 on the mounting frame 1 encloses the transmission mechanism 9, which can effectively prevent external dust, moisture and impurities from entering the transmission components such as the transmission shaft 91, the transmission shaft 92, and the transmission gear 93, and avoid impurities from adhering to the gear meshing, causing jamming, increased wear of components or reduced transmission efficiency.

[0075] The electric heater assembly of this invention can be used in various types of electric heater assemblies;

[0076] Compared with existing electric heater assemblies, this utility model has a flexible and adjustable stirring mode, a stable and reliable transmission system, convenient operation and strong adaptability, and more uniform heating of materials.

[0077] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An electric heater assembly, characterized by include: Mounting bracket (1), independently fixed; A threaded tube (2) is rotatably installed in the shaft hole of the mounting bracket (1), and a threaded rod (3) is fitted inside the threaded tube (2). A stirring shaft (4) is coaxially mounted on the threaded rod (3), and multiple stirring paddles (5) are equidistantly arranged on the stirring shaft (4). A guide frame (6) is mounted on the mounting frame (1). A movable part (7) is mounted on the guide frame (6) in the extension direction. The moving trajectory of the movable part (7) is parallel to the axis of the threaded rod (3). The threaded rod (3) is rotatably mounted on the movable part (7). A servo motor (8) is mounted on the moving part (7), and the output end of the servo motor (8) is coaxially mounted with the threaded rod (3); The transmission mechanism (9) is connected to the moving part (7) and the mounting bracket (1) respectively. The transmission mechanism (9) is used to drive the threaded tube (2) to rotate by the threaded rod (3).

2. The electric heater assembly as claimed in claim 1, characterized in that, The transmission mechanism (9) includes: The drive shaft (91) is rotatably mounted on the mounting bracket (1), and the drive shaft (91) is arranged parallel to the rotation axis of the threaded rod (3); The transmission shaft (92) is rotatably installed in the through hole of the moving part (7). The axis of the transmission shaft (91) coincides with that of the transmission shaft (92). The transmission shaft (91) drives the transmission shaft (92) to rotate synchronously. The transmission shaft (92) is slidably installed along the length direction of the transmission shaft (91). Two transmission gears (93) are coaxially mounted on the transmission shaft (92) and the threaded rod (3), respectively, and the two transmission gears (93) are meshed together. A connecting mechanism (94) is installed on the drive shaft (91). The connecting mechanism (94) is used by the threaded tube (2) to drive the drive shaft (91) to rotate. An adjustment mechanism (95) is installed on the drive shaft (91). The adjustment mechanism (95) is used to adjust the connection position between the connecting mechanism (94) and the drive shaft (91).

3. The electric heater assembly as claimed in claim 2, characterized in that, The connecting mechanism (94) includes: A hollow shaft (94a) is slidably mounted on the transmission shaft (91) along the length direction of the transmission shaft (91), and a first gear (94b) and a second gear (94c) are coaxially mounted on the hollow shaft (94a). The third gear (94d) is coaxially mounted on the threaded tube (2). The third gear (94d) meshes with the first gear (94b). When the third gear (94d) meshes with the first gear (94b), the transmission ratio is not 1:

1. The fourth gear (94e) is coaxially mounted on the threaded tube (2). The fourth gear (94e) meshes with the second gear (94c). When the second gear (94c) meshes with the fourth gear (94e), the transmission ratio is 1:

1.

4. The electric heater assembly as claimed in claim 3, characterized in that, The third gear (94d) and the first gear (94b) and the fourth gear (94e) and the second gear (94c) are engaged in at most one pair at a time.

5. The electric heater assembly as claimed in claim 3, characterized in that, When the second gear (94c) meshes with the fourth gear (94e), the threaded rod (3) and the threaded tube (2) rotate at the same speed, and the height position of the stirring paddle (5) remains unchanged while stirring. When the third gear (94d) meshes with the first gear (94b), the threaded rod (3) and the threaded tube (2) rotate at different speeds, and the height of the stirring paddle (5) rises / falls slowly to stir.

6. The electric heater assembly as claimed in claim 3, characterized in that, The adjustment mechanism (95) includes: An adjusting shaft (95a) is rotatably mounted inside the shaft cavity of the transmission shaft (91), and both the bottom and top ends of the adjusting shaft (95a) are provided with external threads; The connector (95b) is slidably installed in the inner cavity of the drive shaft (91) and connected to the hollow shaft (94a). The connector (95b) is connected to the external thread of the adjusting shaft (95a). A nut (95c) is installed on the external thread at the top of the adjusting shaft (95a). The nut (95c) is used to lock the connection position between the adjusting shaft (95a) and the transmission shaft (91).

7. The electric heater assembly as claimed in claim 6, characterized in that, An adjusting cap (95d) is coaxially mounted on the adjusting shaft (95a), and an anti-slip groove is provided at the edge of the adjusting cap (95d).

8. The electric heater assembly as claimed in claim 1, characterized in that, An isolation box (10) is provided on the mounting frame (1), and the transmission mechanism (9) is located inside the isolation box (10).

9. A molten salt storage tank, characterized in that, The electric heater assembly according to any one of claims 1 to 8 is used.

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