Lost foam casting sand cooling equipment

Abstract

The utility model discloses evaporative pattern casting sand cooling equipment, which relates to the technical field of casting and comprises a cooling tank, a spiral cooling pipe and a sand receiving hopper, the sand receiving hopper is mounted on the upper portion of the cooling tank, a plurality of sand inlets are annularly formed in the bottom surface of the sand receiving hopper, the spiral cooling pipe is arranged in the cooling tank, and the spiral cooling pipe is connected with the sand receiving hopper. A plurality of heat exchange plates are arranged on the outer wall of the spiral cooling pipe at equal intervals, a sand discharging hopper is installed at the bottom of the spiral cooling pipe, the spiral cooling pipe and the heat exchange plates are arranged, the spiral cooling pipe enables fluid to form vortex flow in the heat exchange process, and therefore the contact area between the fluid is increased, and the heat exchange efficiency is improved. Compared with an existing vertical cooling pipe, the cooling pipe is higher in heat exchange efficiency, the heat exchange plate is arranged on the cooling pipe, the heat exchange area is larger through the arrangement of the heat exchange plate, and heat of lost foam casting sand can be transferred into cooling water more quickly.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a lost foam casting sand cooling device. Background Art

[0002] Lost foam casting (also known as full-mold casting) is a new casting method in which paraffin wax or foam models of similar size and shape to the casting are bonded together to form a model cluster. After being coated with refractory coating and dried, the cluster is buried in dry quartz sand and vibrated to shape. Pour the mold under negative pressure, causing the model to vaporize and liquid metal to occupy the model position. After solidification and cooling, the casting is formed. Foundry sand is the key medium in the lost foam casting process and is mainly used for molding. After casting, cooling equipment is required to quickly cool the molding sand to improve production efficiency.

[0003] After searching, patent authorization announcement No. CN 212144405 U discloses a lost foam casting sand cooling device, "including: a tank body, the top of the tank body is an opening; a feed hopper, the feed hopper is fixedly installed on the top of the tank body, and the feed hopper is adapted to the top opening of the tank body; a filter screen, the filter screen is fixedly installed in the feed hopper; a discharge hopper, the discharge hopper is fixedly installed on the bottom of the tank body; a plurality of conduits, the plurality of conduits are fixedly installed on the bottom inner wall of the tank body, the top end of the conduit is fixedly connected to the bottom of the feed hopper, and the conduit is connected to the feed hopper and the discharge hopper; a plurality of round rods, the plurality of round rods are movably installed in the corresponding conduits, and the top end of the round rod extends into the feed hopper; a plurality of slow flow funnels". However, when the above equipment is in use, since the conduit is vertical, the casting sand in the conduit flows downward too fast, the heat exchange time is short, and the conduit surface is smooth and the heat exchange area is limited, so the cooling efficiency of the casting sand is not high enough. Utility Model Content

[0004] The purpose of the utility model is to provide a cooling device for lost foam casting sand to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A lost foam casting sand cooling device comprises a cooling tank, a spiral cooling pipe and a sand receiving hopper, wherein a sand receiving hopper is installed on the upper part of the cooling tank, and a plurality of sand inlets are provided on the bottom surface of the sand receiving hopper in a ring shape, a spiral cooling pipe is provided inside the cooling tank, and a plurality of heat exchange plates are provided on the outer wall of the spiral cooling pipe at equal intervals, the upper port of the spiral cooling pipe corresponds to the sand inlet one by one and is sealedly connected, a sand discharge hopper is installed at the bottom of the spiral cooling pipe, and a sand outlet is provided at the bottom of the sand discharge hopper, the bottom end of the spiral cooling pipe passes through the bottom of the cooling tank, a water inlet is provided on the lower part of one side surface of the cooling tank, and a water outlet is provided on the upper part of the other side surface of the cooling tank.

[0007] As a further solution of the present invention: a conical sand guide cover is provided inside the sand receiving hopper, the conical sand guide cover is installed in the middle of several water inlets, and a circle of sand guide plates is provided on the inner wall of the sand receiving hopper.

[0008] As a further solution of the present invention: four supporting legs are installed on the bottom of the cooling tank.

[0009] As a further solution of the present invention: the heat exchange plate is annular and is composed of two semi-arc plates spliced ​​together.

[0010] As a further solution of the present invention: water valves are installed on the water inlet and the water outlet.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The utility model provides a spiral cooling tube and a heat exchange plate. The spiral cooling tube enables the fluid to form a vortex flow during the heat exchange process, thereby increasing the contact area between the fluids. Compared with the existing vertical cooling tube, the heat exchange efficiency is higher. By arranging the heat exchange plate on the cooling tube, the heat exchange area is larger, and the heat of the lost foam casting sand can be transferred to the cooling water more quickly.

[0013] 2. The utility model is provided with a conical sand guide cover and a sand guide plate. The conical sand guide cover and the sand guide plate can guide the lost foam casting sand entering the sand receiving hopper, making it easier for the lost foam casting sand to be collected at the sand inlet, making the sand feeding smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the internal structure of a lost foam casting sand cooling device.

[0015] Figure 2 This is a top view of a lost foam casting sand cooling device.

[0016] Figure 3 This is a front view of a lost foam casting sand cooling device.

[0017] 1. Cooling tank; 2. Spiral cooling tube; 3. Heat exchange plate; 4. Sand receiving hopper; 5. Conical sand guide cover; 6. Sand guide plate; 7. Support legs; 8. Sand discharge hopper; 9. Sand outlet; 10. Water inlet; 11. Water outlet; 12. Sand inlet. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1 and Figure 3 The bottom of the cooling tank 1 is provided with a sand discharge hopper 8, and the bottom of the sand discharge hopper 8 is provided with a sand outlet 9. The bottom end of the spiral cooling pipe 2 passes through the bottom of the cooling tank 1. A water inlet 10 is provided at the lower part of one side of the cooling tank 1, and a water outlet 11 is provided at the upper part of the other side of the cooling tank 1. Water valves are installed on the water inlet 10 and the water outlet 11. The water valves are used to control the inlet and outflow of cooling water, which is convenient for controlling the water flow rate. Four supporting legs 7 are installed at the bottom of the cooling tank 1. The supporting legs 7 are used to support the cooling tank 1, so as to receive the lost foam casting sand.

[0020] See also Figure 1 A number of heat exchange plates 3 are arranged at equal intervals on the outer wall of the spiral cooling tube 2. The heat exchange plates 3 are annular and are composed of two semi-arc plates. This design makes the installation of the heat exchange plates 3 more convenient. The spiral cooling tube 2 and the heat exchange plates 3 are both made of brass. Brass has high thermal conductivity, which makes the heat exchange efficiency of the spiral cooling tube 2 and the heat exchange plates 3 higher, and the cooling effect of the lost foam casting sand is better.

[0021] See also Figure 1-2 A conical sand guide cover 5 is provided inside the sand receiving hopper 4. The conical sand guide cover 5 is installed in the middle of several water inlets 10. A circle of sand guide plates 6 is provided on the inner wall of the sand receiving hopper 4.

[0022] The working principle of this utility model is:

[0023] During use, the lost foam casting sand is poured into the sand receiving hopper 4, and the lost foam casting sand enters the spiral cooling pipe 2 through the sand inlet 12. In the process of spirally flowing downward in the spiral cooling pipe 2, the lost foam casting sand exchanges heat with the cooling water entering the cooling tank 1 from the water inlet 10, thereby cooling the lost foam casting sand. The cooled lost foam casting sand is discharged from the bottom of the spiral cooling pipe 2 into the sand discharge hopper 8, and finally discharged from the sand outlet 9 at the bottom of the sand discharge hopper 8, and the cooling water after absorbing heat is discharged from the water outlet 11.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lost foam casting sand cooling device, comprising a cooling tank (1), a spiral cooling pipe (2) and a sand receiving hopper (4), characterized in that: A sand receiving hopper (4) is installed on the upper part of the cooling tank (1), and a plurality of sand inlets (12) are provided on the bottom surface of the sand receiving hopper (4) in a ring shape. A spiral cooling pipe (2) is provided inside the cooling tank (1), and a plurality of heat exchange plates (3) are provided on the outer wall of the spiral cooling pipe (2) at equal intervals. The upper end of the spiral cooling pipe (2) corresponds to the sand inlet (12) one by one and is sealedly connected. A sand discharge hopper (8) is installed on the bottom of the spiral cooling pipe (2), and a sand outlet (9) is provided on the bottom of the sand discharge hopper (8). The bottom end of the spiral cooling pipe (2) passes through the bottom of the cooling tank (1), a water inlet (10) is provided on the lower part of one side of the cooling tank (1), and a water outlet (11) is provided on the upper part of the other side of the cooling tank (1).

2. The lost foam casting sand cooling device according to claim 1, characterized in that: A conical sand guide cover (5) is provided inside the sand receiving hopper (4), and the conical sand guide cover (5) is installed in the middle of a plurality of water inlets (10). A circle of sand guide plates (6) is provided on the inner wall of the sand receiving hopper (4).

3. The lost foam casting sand cooling device according to claim 1, characterized in that: Four supporting legs (7) are installed on the bottom of the cooling tank (1).

4. The lost foam casting sand cooling device according to claim 1, characterized in that: The heat exchange plate (3) is annular and is composed of two semi-arc plates spliced ​​together.

5. The lost foam casting sand cooling device according to claim 1, characterized in that: Water valves are installed on the water inlet (10) and the water outlet (11).

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