Molding sand heat exchange device
By setting internal and external spiral blades and needle-shaped heat exchange structures in the molding sand heat exchange device, the problem of heat not being recovered from high-temperature regenerated sand is solved, and efficient heat energy utilization and synchronous cooling and preheating processes are realized.
Patent Information
- Application Number
- CN202423232041.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-26
AI Technical Summary
In existing technologies, the heat from high-temperature recycled sand is not recovered, resulting in energy waste.
Design a molding sand heat exchange device with opposite spiral blades on the inner and outer walls of the inner cylinder. The rotation of the inner cylinder drives the molding sand to move in the opposite direction, realizing heat exchange between high-temperature molding sand and low-temperature molding sand. The inner and outer walls are provided with needle-shaped or prismatic heat exchange structures to increase the contact area and improve the heat exchange efficiency.
This technology enables the simultaneous cooling of high-temperature molding sand and preheating of old sand, maximizing the utilization of thermal energy and improving heat exchange efficiency.
Smart Images
Figure CN223833368U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of heat exchange devices, and in particular to the technical field of molding sand heat exchange devices. Background Technology
[0002] The thermal regeneration of coated sand requires heating the old sand to 750-800℃, and then keeping it warm for a certain period of time (1-3 hours) to mature it. The high-temperature regenerated sand then needs to be cooled to room temperature to complete the regeneration process.
[0003] In existing technologies, the heat from high-temperature recycled sand is not recovered, resulting in energy waste. Summary of the Invention
[0004] The purpose of this invention is to solve the problems in the prior art by proposing a molding sand heat exchange device that can solve the above problems.
[0005] To achieve the above objectives, this utility model proposes a molding sand heat exchange device, including an outer cylinder and an inner cylinder. The inner cylinder is rotatably installed inside the outer cylinder. A preheating chamber is provided inside the outer cylinder and is located outside the inner cylinder. A cooling chamber is provided inside the inner cylinder. Inner spiral blades are provided on the inner wall of the inner cylinder, and outer spiral blades are provided on the outer wall of the inner cylinder. The spiral directions of the inner and outer spiral blades are opposite. A hot sand chamber is connected to one side of the cooling chamber, and a cooling sand chamber is connected to the other side of the cooling chamber. A used sand self-cooling sand chamber is connected to one side of the preheating chamber, and a preheating sand chamber is connected to the other side of the preheating chamber. The hot sand chamber and the preheating sand chamber are located on the same side, and the cooling sand chamber and the used sand self-cooling sand chamber are located on the same side.
[0006] Preferably, the inner cylinder has two ends that extend through the two ends of the outer cylinder, a bracket is provided below the inner cylinder, the portion of the inner cylinder that protrudes from the outer cylinder is rotatably mounted on the bracket, a rotating gear is provided on the inner cylinder, the rotating gear meshes with a drive gear, and the drive gear is connected to a drive motor.
[0007] Preferably, the inner cylinder has a feed cover plate rotatably installed at the feed end, the feed cover plate has a hot sand inlet connected to the hot sand chamber, and the inner cylinder has a discharge cover plate rotatably installed at the discharge end, the discharge cover plate has a hot sand outlet connected to the cooling sand chamber.
[0008] Preferably, the inner wall and outer wall of the inner cylinder are provided with protruding needle-like, prismatic, or plate-like heat exchange structures.
[0009] Preferably, the inner wall of the outer cylinder is lined with an insulation layer.
[0010] The beneficial effects of this utility model are as follows: By setting helical blades in opposite directions on the inner and outer walls of the inner cylinder, the inner cylinder rotates, and the two helical blades drive the molding sand in the cooling chamber and the molding sand in the preheating chamber to move in opposite directions respectively. The inner cylinder transfers the temperature of the high-temperature molding sand to the molding sand on the outside. The cooling of the high-temperature sand after calcination and the preheating of the old sand are carried out simultaneously, so as to maximize the utilization of heat energy. The inner and outer walls of the inner cylinder are provided with protruding needle-shaped, prismatic, or plate-shaped heat exchange structures, which increases the contact area between the molding sand and the inner cylinder and improves the heat exchange efficiency.
[0011] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 This is a schematic diagram of the heat exchange protrusion of this utility model.
[0014] In the diagram: 1. Outer cylinder; 2. Inner cylinder; 3. Preheating chamber; 4. Cooling chamber; 5. Inner spiral blade; 6. Outer spiral blade; 7. Hot sand silo; 8. Cooling sand silo; 9. Old sand self-cooling sand silo; 10. Preheating sand silo; 11. Heat exchange protrusion. Detailed Implementation
[0015] See Figure 1 , Figure 2A molding sand heat exchange device includes an outer cylinder 1 and an inner cylinder 2. The inner cylinder 2 is rotatably installed inside the outer cylinder 1. A preheating chamber 3 is provided inside the outer cylinder 1 and is located on the outside of the inner cylinder 2. A cooling chamber 4 is provided inside the inner cylinder 2. Inner spiral blades 5 are provided on the inner wall of the inner cylinder 2, and outer spiral blades 6 are provided on the outer wall of the inner cylinder 2. The spiral directions of the inner spiral blades 5 and the outer spiral blades 6 are opposite. A hot sand chamber 7 is connected to one side of the cooling chamber 4, and a cooling sand chamber 8 is connected to the other side. A used sand self-cooling sand chamber 9 is connected to one side of the preheating chamber 3, and a preheating sand chamber 10 is connected to the other side of the preheating chamber 3. The hot sand chamber 7 and the preheating sand chamber 10 are located on the same side, and the cooling sand chamber 8 and the used sand self-cooling sand chamber 9 are located on the same side. Both ends of the inner cylinder 2 penetrate the outer cylinder. The inner cylinder 2 is provided at both ends of the outer cylinder 1. A support is provided below the inner cylinder 2. The part of the inner cylinder 2 that protrudes from the outer cylinder 1 is rotatably mounted on the support. A rotating gear is provided on the inner cylinder 2. The rotating gear meshes with a drive gear. The drive gear is connected to a drive motor. A feed cover is rotatably mounted at the feed end of the inner cylinder 2. A hot sand inlet is opened on the feed cover. The hot sand inlet is connected to the hot sand chamber 7. A discharge cover is rotatably mounted at the discharge end of the inner cylinder 2. A hot sand outlet is opened on the discharge cover. The hot sand outlet is connected to a cooling sand chamber 8. Both the inner and outer walls of the inner cylinder 2 are provided with protruding needle-like, prismatic, or plate-like heat exchange structures 11. The outer cylinder 1 is a composite structure. The outer layer is made of steel plate or other structural materials, and the inner lining is made of heat-resistant and heat-insulating material. The inner cylinder body is made of heat-resistant and wear-resistant alloy material.
[0016] The working process of this utility model:
[0017] In the operation of this invention, the high-temperature sand self-heating sand chamber after roasting enters one end (high-temperature section) of the inner cylinder through the inlet device. The cylinder rotates, and the high-temperature sand moves orderly from one end (high-temperature section) to the other end (low-temperature section), continuously transferring heat to the inner cylinder for cooling, and then enters the cooling sand chamber. The high-temperature sand moving inside the inner cylinder transfers heat to the inner cylinder through the needle-shaped heat exchange structure on the inner wall of the inner cylinder, and then transfers heat to the old sand that needs to be preheated in the outer cylinder through the needle-shaped heat exchange structure on the outer wall of the inner cylinder, thereby realizing the cooling of the high-temperature sand and the preheating of the cold sand, and maximizing the utilization of thermal energy.
[0018] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.
Claims
1. A molding sand heat exchange device, characterized in that: The device includes an outer cylinder (1) and an inner cylinder (2). The inner cylinder (2) is rotatably installed inside the outer cylinder (1). The outer cylinder (1) has a preheating chamber (3) inside. The preheating chamber (3) is located outside the inner cylinder (2). The inner cylinder (2) has a cooling chamber (4) inside. The inner wall of the inner cylinder (2) has an inner spiral blade (5). The outer wall of the inner cylinder (2) has an outer spiral blade (6). The spiral directions of the inner spiral blade (5) and the outer spiral blade (6) are opposite. One side of the cooling chamber (4) is connected to a hot sand silo (7). The other side of the cooling chamber (4) is connected to a cooling sand silo (8). One side of the preheating chamber (3) is connected to a used sand self-cooling sand silo (9). The other side of the preheating chamber (3) is connected to a preheating sand silo (10). The hot sand silo (7) and the preheating sand silo (10) are located on the same side. The cooling sand silo (8) and the used sand self-cooling sand silo (9) are located on the same side.
2. The molding sand heat exchanger as described in claim 1, characterized in that: The inner cylinder (2) is provided with both ends passing through the two ends of the outer cylinder (1). A bracket is provided below the inner cylinder (2). The part of the inner cylinder (2) protruding from the outer cylinder (1) is rotatably mounted on the bracket. A rotating gear is provided on the inner cylinder (2). The rotating gear meshes with a drive gear. The drive gear is connected to a drive motor.
3. The molding sand heat exchanger as described in claim 1, characterized in that: The inner cylinder (2) is rotatably equipped with a feed cover plate at the feed end. A hot sand inlet is provided on the feed cover plate and is connected to the hot sand chamber (7). The inner cylinder (2) is rotatably equipped with a discharge cover plate at the discharge end. A hot sand outlet is provided on the discharge cover plate and is connected to a cooling sand chamber (8).
4. The molding sand heat exchanger as described in claim 1, characterized in that: The inner wall (2) is provided with protruding needle-like, prismatic, or plate-like heat exchange structures (11).
5. The molding sand heat exchanger as described in claim 1, characterized in that: The inner wall of the outer cylinder (1) is lined with an insulation layer.