Sand temperature adjusting device for casting

Abstract

The utility model provides a casting sand temperature adjusting device which comprises a material barrel, a hopper is arranged on a barrel cover of the material barrel, a discharging pipe is arranged at the barrel bottom of the material barrel, the barrel wall of the material barrel comprises an outer barrel wall, a middle barrel wall and an inner barrel wall, an outer ring cavity is formed between the outer barrel wall and the middle barrel wall, a middle ring cavity is formed between the middle barrel wall and the inner barrel wall, and the outer ring cavity is communicated with the middle ring cavity. An area enclosed by the inner barrel wall is an inner cavity; a spiral runner is arranged in the middle ring cavity, an inlet is formed in the upper end of the spiral runner and communicated with the hopper, and an outlet is formed in the lower end of the spiral runner and communicated with the discharging pipe; the outer ring cavity and the inner cavity are provided with cooling pipes tightly attached to the wall of the middle barrel respectively. The molding sand cooling device is simple in structure and convenient to operate, molding sand circulation and discharging are achieved through the vertically-coiled spiral flow channel, the cooling pipes are arranged in the inner cavity and the outer cavity of the material barrel respectively, the middle ring cavity is cooled, then the molding sand flowing in the spiral flow channel is cooled, the regeneration and recycling use requirements are met, and the molding sand cooling speed and efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting, in particular to a sand temperature regulating device for casting. Background Art

[0002] Sand casting refers to the production of castings in sand molds. Casting The method is widely used in the production of steel, iron and most non-ferrous alloy castings. In this production method, molding sand is the most important and most used auxiliary material. With the requirements of industry cleaning and resource recycling, the regeneration and utilization of molding sand has received more and more attention, realizing the recycling of sand. The molding sand regeneration production device basically includes a barrel, and a spiral water cooling pipe is arranged outside the barrel. During the regeneration operation, the high-temperature molding sand is loaded into the barrel, and cooling water is introduced into the spiral water cooling pipe. The barrel wall is heat-transferred, and the high-temperature molding sand in the barrel is cooled down to make its temperature meet the use requirements, so that the molding sand can be recycled.

[0003] However, in the molding sand regeneration production device, in order to lead the cooled molding sand out of the barrel, an auger needs to be set in the barrel to transfer the cooled molding sand out of the barrel through the auger, or a spiral sheet and an electric drive mechanism for driving the barrel to rotate are set in the barrel, and the barrel rotates to move the cooled molding sand out of the barrel. The above two structures of sand regeneration production devices are both complex in structure and need to be equipped with corresponding electric drive structures, which makes operation inconvenient. Utility Model Content

[0004] In view of this, the utility model aims to provide a sand temperature regulating device for casting to simplify the structure and facilitate the molding sand regeneration operation.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A sand temperature regulating device for casting, comprising a material barrel, a barrel cover of the material barrel is provided with a material hopper, a barrel bottom is provided with a discharge pipe, the barrel wall of the material barrel comprises an outer barrel wall, a middle barrel wall and an inner barrel wall, an outer annular cavity is formed between the outer barrel wall and the middle barrel wall, a middle annular cavity is formed between the middle barrel wall and the inner barrel wall, and an area enclosed by the inner barrel wall is an inner cavity;

[0007] The middle ring cavity is provided with a spiral flow channel, the upper end of which is provided with an inlet connected to the hopper, and the lower end of which is provided with an outlet connected to the discharge pipe;

[0008] The outer ring cavity and the inner cavity are respectively provided with cooling pipes close to the wall of the middle barrel.

[0009] Furthermore, the cross section of the spiral flow channel is a square structure, and the middle barrel wall and the inner barrel wall of the barrel are used as its two side walls.

[0010] Furthermore, the cooling pipe is a spiral pipe structure, the lower end of which is a water inlet connected to the water inlet pipe, and the upper end of which is a water outlet connected to the water outlet pipe;

[0011] The water inlet pipe and the water outlet pipe both extend out of the material barrel.

[0012] Furthermore, the water inlet pipe and the water outlet pipe of the cooling pipe in the outer ring cavity are both horizontally passed through the outer barrel wall;

[0013] The water inlet pipe and the water outlet pipe of the cooling pipe in the inner cavity are both vertical and pass through the barrel cover of the material barrel.

[0014] Furthermore, a plurality of convex ribs are vertically arranged on the outer surface of the outer barrel wall.

[0015] Compared with the prior art, the sand temperature regulating device for casting described in the utility model has the following advantages:

[0016] (1) The utility model has a simple structure and is easy to operate. It utilizes a vertically coiled spiral flow channel to realize the circulation and discharge of molding sand. Cooling pipes are respectively arranged in the inner and outer cavities of the barrel to cool the middle ring cavity, thereby cooling the molding sand flowing in the spiral flow channel, meeting the requirements of regeneration and recycling, and improving the cooling speed and efficiency of the molding sand.

[0017] (2) In the present invention, the cooling water in the cooling pipe flows from bottom to top, and the molding sand in the spiral flow channel flows from top to bottom, that is, the cooling water and the molding sand flow in opposite directions, so that the temperature of the high-temperature molding sand gradually decreases along its flow direction, thereby achieving stable cooling of the molding sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of a sand temperature regulating device for casting according to an embodiment of the utility model;

[0020] Description of reference numerals:

[0021] 1-barrel; 11-outer barrel wall; 111-outer ring cavity; 12-middle barrel wall; 121-middle ring cavity; 13-inner barrel wall; 131-inner cavity; 14-convex rib; 2-spiral flow channel; 21-lower wall; 22-upper wall; 3-cooling pipe; 31-water inlet pipe; 32-water outlet pipe; 5-hopper; 6-discharge pipe. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] like Figure 1 As shown, a sand temperature regulating device for casting includes a barrel 1, which is made of iron plate and has a cylindrical structure. The barrel wall of the barrel 1 includes an outer barrel wall 11, a middle barrel wall 12 and an inner barrel wall 13 arranged in sequence from the outside to the inside. An outer annular cavity 111 is formed between the outer barrel wall 11 and the middle barrel wall 12, a middle annular cavity 121 is formed between the middle barrel wall 12 and the inner barrel wall 13, and the enclosed area of ​​the inner barrel wall 13 is an inner cavity 131. The outer annular cavity 111 and the inner cavity 131 are respectively provided with cooling pipes 3 close to the middle barrel wall 12, and the cooling water flowing in the cooling pipes 3 cools the middle annular cavity 121. The barrel cover of the barrel 1 is provided with a hopper 5 at the corresponding middle annular cavity 121, and the barrel bottom of the barrel 1 is provided with a discharge pipe 6 at the corresponding middle annular cavity 121.

[0024] A spiral flow channel 2 is provided in the middle ring cavity 121. The spiral flow channel 2 includes a spiral upper wall 22 and a spiral lower wall 21, and uses the middle barrel wall 12 and the inner barrel wall 13 of the barrel 1 as its two side walls. The upper wall 22, the lower wall 21, the middle barrel wall 12 and the inner barrel wall 13 enclose a spiral flow channel structure. Both ends of the spiral flow channel 2 are closed. The upper end of the spiral flow channel 2, i.e., the high end position of the upper wall 22, is provided with an inlet, which is connected to the hopper 5. The lower end, i.e., the lower end of the lower wall 21, is provided with an outlet, which is connected to the discharge pipe 6. The discharge pipe 6 is provided with a valve (not shown in the figure), and the valve is preferably a gate valve. The high-temperature molding sand is fed into the spiral flow channel 2 through the hopper 5, and then flows in the spiral flow channel 2, and is finally discharged through the discharge pipe 6. During the flow of the molding sand, the cooling pipe cools it down.

[0025] In the present invention, the cross section of the spiral flow channel 2 is a square structure, such as Figure 1 Or the cross section of the spiral flow channel 2 is an elliptical structure with a vertical long axis, that is, the upper wall 22 and the lower wall 21 of the spiral flow channel 2 are respectively arc plate structures protruding outward, and the arc plate is spirally wound in the middle ring cavity, and the upper wall 22, the lower wall 21, the middle barrel wall 12 and the inner barrel wall 13 enclose a spiral flow channel structure.

[0026] In the utility model, the cooling pipe 3 is a spiral tube structure, and its rotation direction is the same as that of the spiral flow channel 2, that is, the cooling pipe 3 and the spiral flow channel 2 are both left-handed structures, or both are right-handed structures. The lower end of the cooling pipe 3 is a water inlet, connected to the water inlet pipe 31, and the upper end is a water outlet, connected to the water outlet pipe 32. The water inlet pipe 31 and the water outlet pipe 32 of the cooling pipe 3 arranged in the outer ring cavity 111 are both horizontal and pass through the outer barrel wall 11. The water inlet pipe 31 and the water outlet pipe 32 of the cooling pipe 3 arranged in the inner cavity 131 are both vertical and pass through the barrel cover of the material barrel 1. This structure allows the cooling water to flow from bottom to top in the cooling pipe, and the molding sand to flow from top to bottom in the spiral flow channel. The cooling water and the molding sand flow in opposite directions, so that the temperature of the high-temperature molding sand gradually decreases along its flow direction, thereby achieving stable cooling of the molding sand.

[0027] In the utility model, a plurality of convex ribs 14 are vertically arranged on the outer surface of the outer barrel wall 11 to increase the heat dissipation area of ​​the barrel 1 and improve the heat dissipation efficiency of the barrel.

[0028] In the utility model, a temperature sensor is arranged at the outlet position of the spiral flow channel 2 to detect the temperature of the molding sand when it is discharged. The temperature sensor and the motor corresponding to the gate valve at the discharge pipe 6 are electrically connected to the controller respectively. If the molding sand temperature is higher than the set temperature after cooling, the gate valve will not open, and the molding sand will stay in the spiral flow channel 2. Further cooling operation will be carried out until the molding sand temperature reaches the standard. At this time, the gate valve will open and the molding sand will be discharged.

[0029] The utility model utilizes a vertically coiled spiral flow channel to realize the circulation and discharge of molding sand. Cooling pipes are respectively arranged in the inner cavity and the outer cavity of the material barrel to cool the middle ring cavity, and then the molding sand flowing in the spiral flow channel is cooled, so as to meet the requirements of molding sand regeneration and recycling and improve the cooling speed and efficiency of the molding sand.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sand temperature regulating device for casting, characterized in that: The material barrel (1) comprises a barrel cover provided with a hopper (5), a barrel bottom provided with a discharge pipe (6), a barrel wall of the material barrel (1) comprising an outer barrel wall (11), a middle barrel wall (12) and an inner barrel wall (13), an outer annular cavity (111) being formed between the outer barrel wall (11) and the middle barrel wall (12), a middle annular cavity (121) being formed between the middle barrel wall (12) and the inner barrel wall (13), and an inner cavity (131) being formed in an area enclosed by the inner barrel wall (13); The middle ring cavity (121) is provided with a spiral flow channel (2), the upper end of which is provided with an inlet connected to the hopper (5), and the lower end of which is provided with an outlet connected to the discharge pipe (6); The outer annular cavity (111) and the inner cavity (131) are respectively provided with cooling pipes (3) in close contact with the middle barrel wall (12).

2. A casting sand temperature regulating device according to claim 1, characterized in that: The cross section of the spiral flow channel (2) is a square structure, and uses the middle barrel wall (12) and the inner barrel wall (13) of the barrel (1) as its two side walls.

3. The casting sand temperature regulating device according to claim 1, characterized in that: The cooling pipe (3) is a spiral pipe structure, the lower end of which is a water inlet connected to a water inlet pipe (31), and the upper end of which is a water outlet connected to a water outlet pipe (32); The water inlet pipe (31) and the water outlet pipe (32) both extend out of the barrel.

4. The casting sand temperature regulating device according to claim 3, characterized in that: The water inlet pipe (31) and the water outlet pipe (32) of the cooling pipe (3) in the outer annular cavity (111) are both arranged horizontally and pass through the outer barrel wall (11); The water inlet pipe (31) and the water outlet pipe (32) of the cooling pipe (3) in the inner cavity (131) are both vertical and pass through the barrel cover of the material barrel (1).

5. The casting sand temperature regulating device according to claim 1, characterized in that: The outer surface of the outer barrel wall (11) is vertically provided with a plurality of convex ribs (14).

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