A cooling device for coated sand

Abstract

This utility model discloses a cooling device for coated sand, relating to the field of coated sand cooling technology. It includes a roller assembly consisting of a support base, a cooling roller, a toothed disc, and an annular baffle. Cooling components are disposed on the inner and outer sides of the cooling roller, located between the toothed disc and the annular baffle. These cooling components are used to cool the coated sand inside the cooling roller. The cooling components include an outer cooling unit and an inner cooling unit. The outer cooling unit sprays heat onto the outer wall of the cooling roller. The inner cooling unit enters the cooling roller and contacts the coated sand inside for heat exchange. This utility model, by setting up cooling components, achieves simultaneous cooling inside and outside the cooling roller. Compared to the traditional external spray cooling structure, its heat exchange area is further expanded, and its heat exchange efficiency is further improved, effectively increasing the cooling efficiency of the coated sand.

Description

Technical Field

[0001] This utility model relates to the field of coated sand cooling technology, specifically a cooling device for coated sand. Background Technology

[0002] The coated sand cooling device is one of the key pieces of equipment in the coated sand preparation process line in casting production. It is mainly used to quickly and uniformly cool the coated sand that is at high temperature (usually 80°C-120°C) and just comes out of the sand mixer to near room temperature (usually required to be below 40°C) to meet the requirements of storage, transportation and subsequent core shooting or molding processes.

[0003] Coated sand cooling drums (also known as drum coolers or rotary coolers) are a common type of equipment in the coated sand cooling process. They achieve cooling and loosening of sand particles through physical rolling and airflow exchange. The main structure of the coated sand cooling drum is as follows:

[0004] Rotating drum: A cylindrical or conical metal drum installed at an angle (with baffles or guide vanes installed on the inner wall), driven by a motor and a reducer to rotate slowly; Support system: Rollers and thrust rollers support the drum to ensure stable rotation;

[0005] The cooling system includes two types: air-cooled and water-cooled. The air-cooled system draws in cold air from the feed end of the drum, and after contacting the sand particles in a countercurrent or parallel flow, it is discharged from the discharge end. The water-cooled system is equipped with a cooling water jacket on the outer wall of the drum, which cools the temperature through indirect heat exchange.

[0006] Existing water-cooled coated sand cooling drums cool the outer wall of the drum with cooling water, resulting in a small heat exchange area between the cooling water and the coated sand inside the drum. Therefore, in order to further improve the heat exchange area and heat exchange efficiency of water-cooled coated sand cooling drums, a cooling device for coated sand is provided. Utility Model Content

[0007] The purpose of this invention is to provide a cooling device for coated sand in order to solve the problems mentioned above.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a cooling device for coated sand, comprising a roller assembly consisting of a support base, a cooling roller, a toothed disc, and an annular baffle. Two support bases are symmetrically arranged. The cooling roller is rotatably installed between the two support bases. The toothed disc and the annular baffle are symmetrically fixed to the outer sides of both ends of the cooling roller and located in the middle area of ​​the two support bases. Cooling components are arranged on the inner and outer sides of the cooling roller between the toothed disc and the annular baffle. The cooling components are used to cool the coated sand inside the cooling roller.

[0009] The cooling assembly includes an external cooling unit and an internal cooling unit;

[0010] The external cooling unit is used to spray cool the outer wall of the cooling drum;

[0011] The internal cooling unit is used to enter the interior of the cooling drum and exchange heat with the coated sand inside the cooling drum.

[0012] As a further embodiment of this utility model: the external cooling unit includes a water tank, a spray pipe, and a nozzle;

[0013] The water tank is located below the cooling drum and between the toothed disc and the annular baffle.

[0014] The spray pipe is fixed to one side of the water tank by a bracket, and the spray pipe is distributed above the cooling drum and located in the middle of the toothed disc and the annular baffle. The spray pipe is connected to the water tank through an external connecting pipe and a water pump.

[0015] The nozzles are installed at the bottom of the spray pipe and multiple nozzles are evenly arranged along the long side of the spray pipe.

[0016] The water pump draws cooling water from inside the water tank into the spray pipe and sprays it out through the nozzles to achieve spray cooling of the outer wall of the cooling drum.

[0017] As a further embodiment of this utility model: the internal cooling unit includes a central heat exchange tube and an L-shaped salvage bucket;

[0018] The central heat exchange tubes are distributed in the middle of the inner side of the cooling drum and extend to the outside of the cooling drum's outlet.

[0019] The L-shaped salvage bucket is fixed to the outside of the cooling drum and extends through the cooling drum to connect and communicate with the central heat exchange tube. The part of the L-shaped salvage bucket located on the outside of the cooling drum has a bucket-shaped structure, and multiple L-shaped salvage buckets are arranged along the circumference.

[0020] The vertically downward-facing L-shaped retrieval bucket has a bucket-shaped structure inside the water tank and is used to retrieve the cooling water inside the water tank. When the L-shaped retrieval bucket flips upward, it is used to transport the retrieved cooling water to the interior of the central heat exchange tube, so as to achieve heat exchange with the coated sand inside the cooling drum.

[0021] As a further embodiment of this utility model: the internal cooling unit also includes a return pipe, one end of which is rotatably connected to the end of the central heat exchange pipe located outside the cooling drum via a rotary joint;

[0022] The other end of the return pipe extends above the water tank opening and is fixedly connected to the water tank via a bracket.

[0023] As a further embodiment of this utility model: the L-shaped retrieval bucket extends and protrudes into the interior of the central heat exchange tube, and the portion of the L-shaped retrieval bucket located inside the central heat exchange tube is inclined.

[0024] As a further improvement of this utility model, the inner sides of the inlet, cylinder body, and outlet of the cooling drum are all provided with spiral guide plates for guiding the coated sand.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] By setting up cooling components, simultaneous cooling inside and outside the cooling drum can be achieved. Compared with the traditional external spray cooling structure, its heat exchange area is further expanded and its heat exchange efficiency is further improved, effectively improving the working efficiency of coated sand cooling. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0029] Figure 3 This is a cross-sectional view of the structure of this utility model;

[0030] Figure 4 This is a cross-sectional exploded view of the present invention;

[0031] Figure 5 This is a cross-sectional view of the L-shaped salvage bucket and the central heat exchange tube of this utility model.

[0032] In the diagram: 1. Roller assembly; 101. Support base; 102. Cooling roller; 103. Toothed disc; 104. Annular baffle; 105. Spiral guide plate; 2. Cooling assembly; 201. Water tank; 202. Spray pipe; 203. Nozzle; 204. Central heat exchange pipe; 205. L-shaped retrieval bucket; 206. Return pipe. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1-4In this embodiment of the utility model, a cooling device for coated sand includes a roller assembly 1 consisting of a support base 101, a cooling roller 102, a toothed disc 103, and an annular baffle 104. Two support bases 101 are symmetrically arranged. The cooling roller 102 is rotatably installed between the two support bases 101. The toothed disc 103 and the annular baffle 104 are symmetrically fixed to the outer sides of both ends of the cooling roller 102 and located in the middle area of ​​the two support bases 101. Spiral guide plates 105 for guiding coated sand are provided on the inner side of the inlet, cylinder body, and outlet of the cooling roller 102.

[0035] Cooling components 2 are provided on the inner and outer sides of the cooling drum 102 between the toothed disc 103 and the annular baffle 104. The cooling components 2 are used to cool the coated sand inside the cooling drum 102.

[0036] Cooling assembly 2 includes an external cooling unit and an internal cooling unit;

[0037] The external cooling unit is used to spray and cool the outer wall of the cooling drum 102;

[0038] The internal cooling unit is used to enter the interior of the cooling drum 102 and exchange heat with the coated sand inside the cooling drum 102;

[0039] The external cooling unit includes a water tank 201, a spray pipe 202, and a nozzle 203;

[0040] The water tank 201 is located below the cooling drum 102 and between the toothed disc 103 and the annular baffle 104;

[0041] The spray pipe 202 is fixed to one side of the water tank 201 by a bracket, and the spray pipe 202 is distributed above the cooling drum 102 and located in the middle of the toothed disc 103 and the annular baffle 104. The spray pipe 202 is connected to the water tank 201 through an external connecting pipe and a water pump.

[0042] Spray nozzles 203 are installed at the bottom of spray pipe 202 and multiple nozzles are evenly arranged along the long side of spray pipe 202;

[0043] The water pump draws the cooling water inside the water tank 201 into the spray pipe 202 and sprays it out through the nozzle 203 to achieve spray cooling of the outer wall of the cooling drum 102.

[0044] The internal cooling unit includes a central heat exchange tube 204 and an L-shaped retrieval bucket 205;

[0045] The central heat exchange tube 204 is distributed in the middle of the inner side of the cooling drum 102 and extends to the outside of the outlet of the cooling drum 102;

[0046] The L-shaped salvage bucket 205 is fixed to the outside of the cooling drum 102 and extends through the cooling drum 102 to be connected and conductive with the central heat exchange tube 204. The part of the L-shaped salvage bucket 205 located on the outside of the cooling drum 102 has a bucket-shaped structure, and multiple L-shaped salvage buckets 205 are arranged along the circumference.

[0047] The vertically downward-facing L-shaped retrieval bucket 205 has a bucket-shaped structure inside the water tank 201 and is used to retrieve the cooling water inside the water tank 201. When the L-shaped retrieval bucket 205 flips upward, it is used to transport the retrieved cooling water to the interior of the central heat exchange tube 204 to achieve heat exchange with the coated sand inside the cooling drum 102.

[0048] In this embodiment, it should be noted that when the roller assembly 1 is in use, an external gear motor drives a gear, and the gear meshes with the gear disk 103 to realize the rotation operation of the cooling roller 102. During the rotation of the cooling roller 102, the spiral guide plate 105 is used to realize the stable conveying of the coated sand.

[0049] In addition, the top of the water tank 201 has an open structure. The water level sensor and temperature sensor are installed inside the water tank 201 to monitor the water level and temperature inside the water tank 201. At the same time, an external cooling water circulation pipeline is installed outside the water tank 201 to replenish and drain water from the water tank 201.

[0050] The operating principle of cooling coated sand is as follows:

[0051] The coated sand to be cooled is conveyed to the feed port of the cooling drum 102 by an external conveying device. The coated sand to be cooled can be conveyed to the discharge port of the cooling drum 102 by the rotating spiral guide plate 105. At the same time, the coated sand to be cooled tumbles inside the cooling drum 102.

[0052] At the same time, the water pump connected to the spray pipe 202 is started. The water pump draws the cooling water inside the water tank 201 into the spray pipe 202 and sprays it out through the nozzle 203 to achieve spray cooling of the outer wall of the cooling drum 102. The cooling water flows along the outer wall of the cooling drum 102 and drips back into the water tank 201. The cooling water flowing on the outer wall of the cooling drum 102 exchanges heat with the coated sand inside the cooling drum 102 through the pipe wall of the cooling drum 102.

[0053] In addition, the rotating cooling drum 102 drives the L-shaped salvage bucket 205 to rotate circumferentially. The L-shaped salvage bucket 205, rotating downward and entering the water tank 201, can salvage the cooling water. Afterward, when the L-shaped salvage bucket 205 rotates upward, the salvaged cooling water flows along the inner cavity of the L-shaped salvage bucket 205 into the interior of the central heat exchange tube 205, and flows outward along the inner cavity of the central heat exchange tube 205. During this process, this part of the cooling water exchanges heat with the tumbling coated sand through the tube wall of the L-shaped salvage bucket 205, the central heat exchange tube 205, and the tumbling coated sand.

[0054] By cooperating with the above-mentioned components, synchronous cooling of the cooling drum 102 can be achieved inside and outside. Compared with the traditional external spray cooling structure, its heat exchange area is further expanded and its heat exchange efficiency is further improved, effectively improving the working efficiency of the coated sand cooling.

[0055] Please refer to this carefully. Figures 1-3 The internal cooling unit also includes a return pipe 206, one end of which is rotatably connected to the end of the central heat exchange pipe 204 located outside the cooling drum 102 via a rotary joint;

[0056] The other end of the return pipe 206 extends above the opening of the water tank 201 and is fixedly connected to the water tank 201 by a bracket.

[0057] In this embodiment, it should be noted that when the ball assembly 1 is in use, it is tilted at a small angle, that is, the inlet of the cooling drum is slightly higher than the outlet. Similarly, the end of the central heat exchange tube 204 near the return tube 206 is lower than the other end, and the end of the central heat exchange tube 204 away from the return tube 206 is in a closed state.

[0058] The cooling water entering the central heat exchange tube 204 flows along the inner cavity of the central heat exchange tube 204 toward the return pipe 206, and then flows back to the water tank 201 through the return pipe 206, thus realizing the circulation of cooling water (it should be noted that the rotary joint is used to prevent the return pipe 206 from interfering with the rotation of the central heat exchange tube 204).

[0059] Please refer to this carefully. Figure 5 The L-shaped retrieval bucket 205 extends and protrudes into the interior of the central heat exchange tube 204, and the part of the L-shaped retrieval bucket 205 located inside the central heat exchange tube 204 is inclined.

[0060] In this embodiment: the openings of the multiple annularly distributed L-shaped salvage buckets 205 located inside the central heat exchange tube 204 are not aligned with each other (e.g., Figure 5 This prevents the water entering the central heat exchange tube 204 from flowing out of the other downward-facing L-shaped retrieval bucket 205, thus allowing most of the cooling water to flow along the inner cavity of the central heat exchange tube 204, ensuring the heat exchange effect of the central heat exchange tube 204.

[0061] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cooling device for coated sand, comprising a roller assembly (1) consisting of a support base (101), a cooling roller (102), a toothed disc (103), and an annular baffle (104), wherein two support bases (101) are symmetrically arranged, the cooling roller (102) is rotatably mounted between the two support bases (101), and the toothed disc (103) and the annular baffle (104) are symmetrically fixed to the outer sides of both ends of the cooling roller (102) and located in the middle area of ​​the two support bases (101), characterized in that, The cooling roller (102) is provided with a cooling component (2) located between the toothed disc (103) and the annular baffle (104) on its inner and outer sides. The cooling component (2) is used to cool the coated sand inside the cooling roller (102). The cooling assembly (2) includes an external cooling unit and an internal cooling unit; The external cooling unit is used to spray and cool the outer wall of the cooling drum (102); The internal cooling unit is used to enter the interior of the cooling drum (102) and exchange heat with the coated sand inside the cooling drum (102).

2. The cooling device for coated sand according to claim 1, characterized in that, The external cooling unit includes a water tank (201), a spray pipe (202), and a nozzle (203); The water tank (201) is located below the cooling drum (102) and between the toothed disc (103) and the annular baffle (104); The spray pipe (202) is fixed to one side of the water tank (201) by a bracket, and the spray pipe (202) is distributed above the cooling drum (102) and located in the middle of the toothed disc (103) and the annular baffle (104). The spray pipe (202) is connected to the water tank (201) through an external connecting pipe and a water pump. The nozzles (203) are installed at the bottom of the spray pipe (202) and are evenly arranged in multiples along the long side of the spray pipe (202); The water pump draws the cooling water inside the water tank (201) into the spray pipe (202) and sprays it out through the nozzle (203) to achieve spray cooling of the outer wall of the cooling drum (102).

3. The cooling device for coated sand according to claim 2, characterized in that, The internal cooling unit includes a central heat exchange tube (204) and an L-shaped salvage bucket (205). The central heat exchange tube (204) is distributed in the middle of the inner side of the cooling drum (102) and extends to the outside of the outlet of the cooling drum (102); The L-shaped salvage bucket (205) is fixed to the outside of the cooling drum (102) and extends through the cooling drum (102) and is connected to the central heat exchange tube (204). The part of the L-shaped salvage bucket (205) located on the outside of the cooling drum (102) has a bucket-shaped structure. Multiple L-shaped salvage buckets (205) are arranged along the circumferential direction. The vertically downward-facing L-shaped retrieval bucket (205) has a bucket-shaped structure inside the water tank (201) and is used to retrieve the cooling water inside the water tank (201). When the L-shaped retrieval bucket (205) flips upward, it is used to transport the retrieved cooling water to the interior of the central heat exchange tube (204) to achieve heat exchange with the coated sand inside the cooling drum (102).

4. A cooling device for coated sand according to claim 3, characterized in that, The internal cooling unit also includes a return pipe (206), one end of which is rotatably connected to the end of the central heat exchange pipe (204) located outside the cooling drum (102) via a rotary joint; The other end of the return pipe (206) extends above the opening of the water tank (201) and is fixedly connected to the water tank (201) by a bracket.

5. A cooling device for coated sand according to claim 3, characterized in that, The L-shaped retrieval bucket (205) extends into the interior of the central heat exchange tube (204), and the portion of the L-shaped retrieval bucket (205) located inside the central heat exchange tube (204) is inclined.

6. A cooling device for coated sand according to claim 1, characterized in that, The cooling drum (102) is equipped with spiral guide plates (105) for guiding the coated sand at the inlet, cylinder body and outlet.

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