Reaction kettle for precoated sand production

Abstract

The utility model discloses a reaction kettle for precoated sand production, relates to the field of reaction kettles, and aims to solve the technical problems that in the prior art, a heating cavity is only arranged in the side end face of an existing reaction kettle to heat internal raw materials, but only materials on the inner wall of the reaction kettle can be heated, the heating of middle materials in the reaction kettle is slow, and the heating efficiency is low. And the production efficiency of the reaction kettle is influenced. An inner tank body is arranged in the reaction kettle outer tank body, an annular heating cavity is formed in the middle between the inner tank body and the reaction kettle outer tank body, a plurality of first heating pieces are arranged in the annular heating cavity, a plurality of heat conduction pipes are fixedly connected to the side end face of the interior of the inner tank body, and second heating pieces are arranged in the heat conduction pipes; a stirring shaft is rotationally connected to the middle of the inner tank body, a fixed roller is fixedly connected to the stirring shaft, and a plurality of stirring rods are fixedly connected to the fixed roller.

Description

Technical Field

[0001] The utility model relates to the field of reaction kettles, in particular to a reaction kettle for producing coated sand. Background Art

[0002] Coated sand is a type of sand or core sand that is covered with a layer of solid resin film on the surface of the sand before molding. There are two coating processes: cold method and hot method. In the cold method, the resin is dissolved in ethanol, and hexamethylenetetramine is added during the sand mixing process, so that the two are coated on the surface of the sand. The ethanol evaporates to obtain coated sand. In the hot method, the sand is preheated to a certain temperature, the resin is added to melt it, and the resin is stirred to coat the surface of the sand. The hexamethylenetetramine aqueous solution and lubricant are added, and the coated sand is cooled, crushed, and sieved to obtain coated sand, which is used for steel and iron castings. Coated sand mainly uses high-quality selected natural quartz sand as raw sand, thermoplastic phenolic resin, hexamethylenetetramine and enhancer as raw materials. According to the different technical requirements of users, the proportions are appropriately adjusted in terms of curing speed, demolding, fluidity, disintegration, casting surface finish, storage, etc.

[0003] Authorization announcement number CN 212681013 U, a reaction kettle for the production of coated sand phenolic resin, including a kettle body, a first bearing is arranged on the lower surface of the kettle body, a driving shaft is fixedly connected to the inner side of the first bearing, a motor is installed on the upper end of the kettle body, the rotating shaft of the motor passes through one end of the kettle body and is connected to the driving shaft, a stirring blade is arranged on the surface of the driving shaft, a second bearing is symmetrically arranged on the lower surface of the kettle body, a rotating rod is arranged on the inner side of the second bearing, and a spiral blade is arranged on the surface of the rotating rod. The motor drives the driving shaft to rotate, which will drive the turntable and the rotating rod to rotate in conjunction, because the surface of the driving shaft is provided with stirring blades, the lower end of the turntable is provided with a stirring rod, and the surface of the rotating rod is provided with spiral blades, so the materials inside the kettle body can be stirred evenly through three-stage stirring.

[0004] The existing reactor only has a heating chamber inside the side end surface to heat the internal raw materials, but can only heat the materials on the inner wall of the reactor. The heating of the middle material inside the reactor is slow, affecting the production efficiency of the reactor. Therefore, the market urgently needs to develop a reactor for coated sand production to help people solve the existing problems. Utility Model Content

[0005] The purpose of the utility model is to provide a reactor for producing coated sand, so as to solve the problem that the existing reactor proposed in the above background technology only has a heating chamber inside the side end face to heat the internal raw materials, but can only heat the materials on the inner wall of the reactor, and the heating of the middle material inside the reactor is slow, which affects the production efficiency of the reactor.

[0006] To achieve the above object, the present utility model provides the following technical solution: A reaction kettle for the production of coated sand, including an outer tank body of the reaction kettle, an inner tank body is arranged inside the outer tank body of the reaction kettle, an annular heating cavity is arranged in the middle between the inner tank body and the outer tank body of the reaction kettle, a plurality of first heating elements are arranged inside the annular heating cavity, a plurality of heat conduction tubes are fixedly connected to the inner side end surface inside the inner tank body, a second heating element is arranged inside the heat conduction tubes, a stirring shaft is rotatably connected to the middle of the inner tank body, a fixed roller is fixedly connected to the stirring shaft, and a plurality of stirring rods are fixedly connected to the fixed roller.

[0007] Preferably, a feed pipe is jointly arranged between one side of the upper end of the outer tank body of the reaction kettle and the inner tank body, and a discharge pipe is jointly arranged between the middle of the lower end of the outer tank body of the reaction kettle and the inner tank body.

[0008] Preferably, the lower end of the discharge pipe is openably connected with a sealing cover, a blocking member is fixedly connected to the upper end of the sealing cover, and the blocking member is inserted into the discharge pipe.

[0009] Preferably, a heat preservation layer is filled between the inner tank body and the outer tank body of the reaction kettle, and the annular heating cavity and the heat conduction tubes are both filled with heat conduction oil.

[0010] Preferably, a spiral blade is fixedly connected to the lower end of the fixed roller.

[0011] Preferably, a limiting pipe is jointly arranged between the middle of the upper end of the outer tank body of the reaction kettle and the upper middle part inside the inner tank body, and a stirring motor is arranged in the middle of the upper end of the outer tank body of the reaction kettle.

[0012] Preferably, the upper end of the stirring shaft passes through the limiting pipe and extends out of the upper end of the outer tank body of the reaction kettle and is fixedly connected to the output shaft of the stirring motor.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. In this utility model, through the arrangement of the heat conduction tubes, a plurality of heat conduction tubes are fixedly connected to the inner side end surface inside the inner tank body, a plurality of heat conduction tubes are fixedly connected to the inner side end surface inside the inner tank body, the annular heating cavity and the heat conduction tubes are both filled with heat conduction oil, the heat conduction oil inside the annular heating cavity and the heat conduction tubes is heated by the first heating element and the second heating element respectively, and then the reaction raw materials inside the inner tank body are heated. By inserting the heat conduction tubes into the raw materials inside the inner tank body to heat the inside of the raw materials, the raw materials are evenly heated inside the inner tank body, improving the production efficiency of the raw materials.

[0015] 2. In this utility model, through the arrangement of the spiral blades, when the raw materials are injected into the inner tank from the feed pipe, the stirring motor drives the stirring shaft to rotate, so that the fixed roller synchronously drives the stirring rod and the spiral blades to rotate. The lower end of the fixed roller is fixedly connected with the spiral blades. When the spiral blades stir the internal raw materials, the raw materials at the lower end of the inner tank are conveyed upward, so that when the internal raw materials are stirred, the raw materials form an up-and-down circulating flow, improving the reaction efficiency.

[0016] 3. In this utility model, through the arrangement of the plug, a discharge pipe is jointly arranged between the middle part of the lower end of the outer tank of the reaction kettle and the inner tank. The lower end of the discharge pipe is openably connected with a cover. The upper end of the cover is fixedly connected with a plug, and the plug is inserted into the discharge pipe. The inside of the discharge pipe is blocked by the plug, so that when the raw materials in the inner tank are stirred and reacted, the raw materials will not enter the discharge pipe in advance, resulting in incomplete reaction. Brief Description of the Drawings

[0017] Figure 1 is the front view of a reaction kettle for producing coated sand of the present utility model;

[0018] Figure 2 is the main sectional view of the present utility model;

[0019] Figure 3 is the top sectional view of the present utility model;

[0020] Figure 4 is the enlarged detail view A of the present utility model.

[0021] In the figure: 1. Outer tank of the reaction kettle; 101. Feed pipe; 102. Discharge pipe; 103. Limiting pipe; 2. Inner tank; 201. Heat preservation layer; 202. Annular heating cavity; 203. First heating element; 3. Heat conduction pipe; 301. Second heating element; 4. Stirring shaft; 401. Fixed roller; 402. Stirring rod; 403. Spiral blade; 5. Stirring motor; 6. Cover; 601. Plug. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] Please refer to Figures 1-4, An embodiment provided by the present utility model: A reaction kettle for the production of coated sand, including an outer reaction kettle body 1, an inner tank 2 is arranged inside the outer reaction kettle body 1, a circular heating cavity 202 is arranged in the middle between the inner tank 2 and the outer reaction kettle body 1, and a plurality of first heating elements 203 are arranged inside the circular heating cavity 202. A plurality of heat conduction tubes 3 are fixedly connected to the inner side end surface of the inner tank 2, a second heating element 301 is arranged inside the heat conduction tube 3, a stirring shaft 4 is rotatably connected to the middle of the inner tank 2, a fixed roller 401 is fixedly connected to the stirring shaft 4, and a plurality of stirring rods 402 are fixedly connected to the fixed roller 401.

[0024] Furthermore, a feed pipe 101 is jointly arranged between one side of the upper end of the outer reaction kettle body 1 and the inner tank 2, and a discharge pipe 102 is jointly arranged between the middle of the lower end of the outer reaction kettle body 1 and the inner tank 2.

[0025] Furthermore, the lower end of the discharge pipe 102 is openably connected with a sealing cover 6, a plug 601 is fixedly connected to the upper end of the sealing cover 6, the plug 601 is inserted into the inside of the discharge pipe 102, and the inside of the discharge pipe 102 is blocked by the plug 601, so that when the raw materials inside the inner tank 2 are stirred and reacted, the raw materials will not enter the discharge pipe 102 in advance, resulting in incomplete reaction.

[0026] Furthermore, a heat insulation layer 201 is filled between the inner tank 2 and the outer reaction kettle body 1, and heat insulation is carried out between the inner tank 2 and the outer reaction kettle body 1 through the heat insulation layer to prevent the heat inside the inner tank 2 from being dissipated. The inside of the circular heating cavity 202 and the heat conduction tube 3 are both filled with heat conduction oil. The heat conduction oil inside the circular heating cavity 202 and the heat conduction tube 3 is heated by the first heating element 203 and the second heating element 301 respectively, and then the reaction raw materials inside the inner tank 2 are heated. The heat conduction tube 3 is inserted into the inside of the raw materials in the inner tank 2 to heat the inside of the raw materials, so that the raw materials are evenly heated inside the inner tank 2, improving the production efficiency of the raw materials.

[0027] Furthermore, a spiral blade 403 is fixedly connected to the lower end of the fixed roller 401. When the internal raw materials are stirred by the spiral blade 403, the raw materials at the lower end of the inner tank 2 are conveyed upward, so that when the internal raw materials are stirred, the raw materials form an up-and-down circulating flow, improving the reaction efficiency.

[0028] Furthermore, a limiting tube 103 is jointly arranged between the middle of the upper end of the outer reaction kettle body 1 and the upper middle part of the inside of the inner tank 2, and a stirring motor 5 is arranged in the middle of the upper end of the outer reaction kettle body 1.

[0029] Furthermore, the upper end of the stirring shaft 4 passes through the limiting tube 103 and extends out of the upper end of the outer reaction kettle body 1 and is fixedly connected to the output shaft of the stirring motor 5. The stirring shaft 4 is driven to rotate by the stirring motor 5, so that the fixed roller 401 synchronously drives the stirring rod 402 and the spiral blade 403 to rotate.

[0030] Working principle: When in use, raw materials are injected into the inner tank body 2 from the feed pipe 101. There is an annular heating cavity 202 in the middle between the inner tank body 2 and the outer tank body 1 of the reaction kettle. A plurality of first heating elements 203 are arranged inside the annular heating cavity 202. A plurality of heat conduction pipes 3 are fixedly connected to the inner side end surface of the inner tank body 2. A second heating element 301 is arranged inside the heat conduction pipe 3. The annular heating cavity 202 and the heat conduction pipe 3 are both filled with heat conduction oil. The heat conduction oil inside the annular heating cavity 202 and the heat conduction pipe 3 is heated by the first heating element 203 and the second heating element 301 respectively, so as to heat the reaction raw materials inside the inner tank body 2. By inserting the heat conduction pipe 3 into the interior of the raw materials in the inner tank body 2, the interior of the raw materials is heated, so that the raw materials are evenly heated in the inner tank body 2, improving the production efficiency of the raw materials. A heat preservation layer 201 is filled between the inner tank body 2 and the outer tank body 1 of the reaction kettle. Heat insulation is carried out between the inner tank body 2 and the outer tank body 1 of the reaction kettle through the heat preservation layer to prevent the heat inside the inner tank body 2 from dissipating. The stirring motor 5 drives the stirring shaft 4 to rotate, so that the fixed roller 401 synchronously drives the stirring rod 402 and the spiral blade 403 to rotate. When the spiral blade 403 stirs the internal raw materials, the raw materials at the lower end of the inner tank body 2 are conveyed upward, so that when the internal raw materials are stirred, the raw materials form an up-and-down circulating flow, improving the reaction efficiency. A discharge pipe 102 is jointly arranged between the middle part at the lower end of the outer tank body 1 of the reaction kettle and the inner tank body 2. A cover 6 is connected to the lower end of the discharge pipe 102 in an openable manner. A blocking member 601 is fixedly connected to the upper end of the cover 6. The blocking member 601 is inserted into the interior of the discharge pipe 102. The interior of the discharge pipe 102 is blocked by the blocking member 601, so that when the raw materials inside the inner tank body 2 are stirred and reacted, the raw materials will not enter the discharge pipe 102 in advance, resulting in incomplete reaction.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A reactor for the production of coated sand, comprising an outer reactor tank (1), characterized in that: Inside the outer tank body (1) of the reactor, an inner tank body (2) is provided. An annular heating chamber (202) is arranged in the middle between the inner tank body (2) and the outer tank body (1) of the reactor. A plurality of first heating elements (203) are arranged inside the annular heating chamber (202). A plurality of heat conduction tubes (3) are fixedly connected to the inner side end surface inside the inner tank body (2). A second heating element (301) is arranged inside the heat conduction tube (3). A stirring shaft (4) is rotatably connected to the middle of the inner tank body (2). A fixed roller (401) is fixedly connected to the stirring shaft (4). A plurality of stirring rods (402) are fixedly connected to the fixed roller (401).

2. The reactor for producing coated sand according to claim 1, characterized in that: A feed pipe (101) is jointly arranged between one side of the upper end of the outer tank body (1) of the reactor and the inner tank body (2). A discharge pipe (102) is jointly arranged between the middle of the lower end of the outer tank body (1) of the reactor and the inner tank body (2).

3. The reactor for producing coated sand according to claim 2, characterized in that: A cover (6) is openably connected to the lower end of the discharge pipe (102). A plugging member (601) is fixedly connected to the upper end of the cover (6). The plugging member (601) is inserted into the discharge pipe (102).

4. A reactor for producing coated sand according to claim 1, characterized in that: A heat insulation layer (201) is filled between the inner tank body (2) and the outer tank body (1) of the reactor. The annular heating chamber (202) and the heat conduction tube (3) are both filled with heat conduction oil.

5. A reactor for producing coated sand according to claim 1, characterized in that: A spiral blade (403) is fixedly connected to the lower end of the fixed roller (401).

6. The reactor for producing coated sand according to claim 1, characterized in that: A limiting pipe (103) is jointly arranged between the middle of the upper end of the outer tank body (1) of the reactor and the upper middle part inside the inner tank body (2). A stirring motor (5) is arranged in the middle of the upper end of the outer tank body (1) of the reactor.

7. A reactor for producing coated sand according to claim 6, characterized in that: The upper end of the stirring shaft (4) passes through the limiting pipe (103), extends out of the upper end of the outer tank body (1) of the reactor, and is fixedly connected to the output shaft of the stirring motor (5).

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