Preheating mechanism of rubber extruder

Abstract

The utility model discloses a preheating mechanism of a rubber extruder, relates to the technical field of screw extruders, and provides the following scheme aiming at the problems that in the background technology, heat generated during operation of the screw extruder is not recycled, materials are preheated only through a heating pipe, and the practicability is low. Comprising a preheating mechanism arranged on the screw extruder, the preheating mechanism comprises a mounting cylinder, a material guide block and a conveying pipe, the mounting cylinder penetrates through the inner wall of the bottom of the mounting cylinder and is fixedly provided with an arc-shaped heat exchange plate, the material guide block is of a V-shaped structure, and the conveying pipe is fixedly arranged on the inner wall of one side of the mounting cylinder; the conveying assembly comprises a conveying motor, a mounting shaft connected to the outer wall of one end of an output shaft of the conveying motor through a coupler and a spiral blade fixedly arranged on the outer wall of the mounting shaft, and a heat exchange mechanism is arranged on the screw extruder. According to the utility model, heat generated during operation of the screw extruder can be recovered, and materials can be preheated, so that the practicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of screw extruder technology, and in particular to a preheating mechanism for a rubber extruder. Background Technology

[0002] A screw extruder is an automatic feeding device, which is divided into two types: cold-feed screw extruders and hot-feed screw extruders. Both are used to extrude rubber semi-finished products and finished products.

[0003] A search revealed a Chinese patent (application number "202223013706.0") disclosing "a screw extruder feeding preheating mechanism." This preheating mechanism includes a feeding hopper, which comprises a preheating section and a mixing section. A conical cylinder is rotatably arranged within the preheating section, forming a feeding channel between the conical cylinder and the preheating section. Spiral fins are provided on the conical cylinder, and a heating tube is installed on the inner wall of the feeding hopper. When the conical cylinder rotates, it feeds the material entering the preheating section into the feeding channel for heating and then transports it to the mixing section. However, this preheating mechanism does not recover and utilize the heat generated during the operation of the screw extruder; it only preheats the material through the heating tube, resulting in low practicality. Utility Model Content

[0004] This utility model provides a preheating mechanism for a rubber extruder, which solves the problem of the preheating mechanism proposed in the prior art not recovering and utilizing the heat generated during the operation of the screw extruder, and only preheating the material through the heating tube, resulting in low practicality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A preheating mechanism for a rubber extruder includes a preheating mechanism mounted on a screw extruder. The preheating mechanism includes an installation cylinder with an arc-shaped heat exchange plate extending through and fixed to its bottom inner wall, a "V"-shaped guide block, and a conveying pipe fixed to one inner wall of the installation cylinder. A conveying assembly is provided inside the installation cylinder. The conveying assembly includes a conveying motor, an installation shaft connected to the outer wall of one end of the conveying motor's output shaft via a coupling, and helical blades fixed to the outer wall of the installation shaft. A heat exchange mechanism is provided on the screw extruder. The heat exchange mechanism includes components fixed to the screw extruder. The screw extruder has an insulation frame on the outer wall, two fans that are bolted to one side of the outer wall of the insulation frame, a mounting plate fixed to the lower inner wall of one side of the insulation frame, several ceramic heating rods that are bolted to the top outer wall of the mounting plate, a heat-conducting plate fixed to the bottom inner wall of the insulation frame, and several heat sinks fixed to the top outer wall of the heat-conducting plate. The screw extruder is equipped with a feeding mechanism at the feed end. The feeding mechanism includes a feed hopper connected to the top outer wall of the screw extruder via a flange and two circulation pipes that are fixed to the lower inner wall of the guide block on both sides of the mounting cylinder.

[0007] Preferably, the mounting cylinder is fixed on the top outer wall of the screw extruder, and the guide block is fixed on the middle inner wall of the mounting cylinder.

[0008] Preferably, a mounting bracket is fixed on one outer wall of the mounting cylinder, and the conveying motor is connected to the outer wall of the mounting bracket by bolts. A fixing block is fixed on the inner wall of one end of the conveying pipe, and one end of the mounting shaft passes through and is connected to the outer wall of the fixing block by a bearing.

[0009] The above scheme uses an installation cylinder and a guide block to form a storage space with an open top. Then, the output shaft of the conveyor motor drives the installation shaft and the spiral blades to rotate, and the spiral blades convey the material in the installation cylinder.

[0010] Preferably, the top of the heat insulation frame is fixed to the outer wall of the bottom of the conveying pipe, and the tops of several ceramic heating rods are respectively connected to the inner wall of the top of the heat insulation frame by bolts. An air conveying frame is fixed on one inner wall of the heat insulation frame, and one end of the air conveying frame is fixed to one inner wall of the mounting cylinder.

[0011] Preferably, the feed hopper is bolted to the top outer wall of the feed end of the screw extruder, and one end of the conveying pipe is fixed to the upper inner wall of one side of the feed hopper, while one end of each of the two circulation pipes is fixed to the lower inner wall of both sides of the feed hopper.

[0012] The above scheme uses a fan to transport the heat generated by the ceramic heating rod during operation to the space below the guide block inside the mounting cylinder. This heat preheats the material on the inner wall of the bottom of the guide block. After the screw extruder has been running for a period of time, the heat exchange plate and heat conduction plate exchange heat with the screw extruder. The fan transports the heat from the heat sink, mixed with the heat from the ceramic heating rod, into the mounting cylinder, where the material is preheated. At the same time, some of the heat in the insulation frame rises and exchanges heat with the conveying pipe, preheating the material in the conveying pipe again. Some of the heat in the mounting cylinder enters the feed hopper through the circulation pipe, preheating the material in the feed hopper again.

[0013] Preferably, a sealing cover is bolted to the top outer wall of the feed hopper, and an exhaust pipe is fixed to the bottom outer wall of the sealing cover. A pressure relief valve is clamped to the outer wall of one end of the exhaust pipe.

[0014] The beneficial effects of this utility model are as follows:

[0015] The blower transports the heat generated by the ceramic heating rod during operation to the space below the guide block inside the mounting cylinder, preheating the material on the inner wall of the bottom of the guide block. After the screw extruder has been running for a period of time, the heat exchange plate and heat conduction plate exchange heat with the screw extruder. The blower transports the heat from the heat sink, mixed with the heat from the ceramic heating rod, into the mounting cylinder, preheating the material inside. Simultaneously, some heat from the insulation frame rises and exchanges heat with the conveying pipe, further preheating the material in the conveying pipe. Some heat from the mounting cylinder enters the feed hopper through the circulation pipe, further preheating the material in the feed hopper. This process recovers the heat generated by the screw extruder during operation and preheats the material, improving its practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall main structure of a rubber extruder preheating mechanism proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the main structure of a preheating mechanism for a rubber extruder proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the main structure of the conveying component of a rubber extruder preheating mechanism proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of the main structure of the heat exchange mechanism of a rubber extruder preheating mechanism proposed in this utility model.

[0020] Figure 5 The present utility model proposes Figure 4 Enlarged structural diagram at point A in the middle.

[0021] Figure 6 This is a schematic diagram of the main structure of the feeding mechanism of a rubber extruder preheating mechanism proposed in this utility model.

[0022] In the diagram: 1. Screw extruder; 2. Preheating mechanism; 201. Mounting cylinder; 202. Guide block; 203. Conveying pipe; 3. Conveying assembly; 301. Mounting frame; 302. Conveying motor; 303. Mounting shaft; 304. Spiral blade; 305. Fixing block; 4. Heat exchange mechanism; 401. Insulation frame; 402. Fan; 403. Mounting plate; 404. Ceramic heating rod; 405. Heat conducting plate; 406. Heat sink; 407. Air conveying frame; 5. Feeding mechanism; 501. Feed hopper; 502. Circulation pipe; 6. Sealing cover. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1, referring to Figure 1-3 A preheating mechanism for a rubber extruder includes a preheating mechanism 2 mounted on a screw extruder 1. The preheating mechanism 2 includes an installation cylinder 201 with an arc-shaped heat exchange plate extending through and fixed to its bottom inner wall, a "V"-shaped guide block 202, and a conveying pipe 203 fixed to one inner wall of the installation cylinder 201. The installation cylinder 201 is fixed to the top outer wall of the screw extruder 1, and the guide block 202 is fixed to the middle inner wall of the installation cylinder 201. A conveying assembly 3 is provided inside the installation cylinder 201. 3 includes a conveyor motor 302, a mounting shaft 303 connected to the outer wall of one end of the output shaft of the conveyor motor 302 via a coupling, and a spiral blade 304 fixed to the outer wall of the mounting shaft 303. A mounting bracket 301 is fixed to one side of the outer wall of the mounting cylinder 201. The conveyor motor 302 is connected to one side of the outer wall of the mounting bracket 301 via bolts. A fixing block 305 is fixed to one side of the inner wall of the conveying pipe 203. One end of the mounting shaft 303 passes through and is connected to one side of the outer wall of the fixing block 305 via a bearing.

[0025] Example 2, refer to Figure 4-6 A preheating mechanism for a rubber extruder further includes a heat exchange mechanism 4. The heat exchange mechanism 4 includes a heat insulation frame 401 fixed to the outer wall of the screw extruder 1, two fans 402 respectively bolted to one side of the outer wall of the heat insulation frame 401, a mounting plate 403 fixed to the lower inner wall of one side of the heat insulation frame 401, several ceramic heating rods 404 bolted to the top outer wall of the mounting plate 403, a heat-conducting plate 405 fixed to the bottom inner wall of the heat insulation frame 401, and several heat dissipation fins 406 fixed to the top outer wall of the heat-conducting plate 405. The top of the heat insulation frame 401 is fixed to the bottom outer wall of the conveying pipe 203. The top ends of the several ceramic heating rods 404 are respectively bolted to the top inner wall of the heat insulation frame 401. A conveying pipe 203 is fixed to one side of the inner wall of the heat insulation frame 401. The air frame 407 is fixed at one end to the inner wall of the mounting cylinder 201. The feed end of the screw extruder 1 is provided with a feeding mechanism 5. The feeding mechanism 5 includes a feed hopper 501 connected to the top outer wall of the screw extruder 1 by a flange and two circulation pipes 502 respectively fixed on the lower inner wall of the guide block 202 on both sides of the mounting cylinder 201. The feed hopper 501 is bolted to the top outer wall of the feed end of the screw extruder 1. One end of the conveying pipe 203 is fixed to the upper inner wall of the feed hopper 501. One end of the two circulation pipes 502 is fixed to the lower inner wall of the feed hopper 501 on both sides. A sealing cover 6 is bolted to the top outer wall of the feed hopper 501. An exhaust pipe is fixed to the bottom outer wall of the sealing cover 6. A pressure relief valve is clamped on the outer wall of one end of the exhaust pipe.

[0026] Working principle: The mounting cylinder 201 and the guide block 202 form a storage space with an open top. The output shaft of the conveyor motor 302 drives the mounting shaft 303 and the spiral blades 304 to rotate. The spiral blades 304 convey the material inside the mounting cylinder 201. The fan 402 transfers the heat generated by the ceramic heating rod 404 to the space inside the mounting cylinder 201 below the guide block 202, preheating the material on the inner wall of the bottom of the guide block 202. After the screw extruder 1 has been running for a period of time, heat exchange... The plate and heat-conducting plate 405 exchange heat with the screw extruder 1. The fan 402 transports the heat from the heat sink 406, mixed with the heat from the ceramic heating rod 404, into the mounting cylinder 201, which then preheats the material in the mounting cylinder 201. At the same time, some of the heat in the insulation frame 401 rises and exchanges heat with the conveying pipe 203, which then preheats the material in the conveying pipe 203 again. Some of the heat in the mounting cylinder 201 enters the feed hopper 501 through the circulation pipe 502, which then preheats the material in the feed hopper 501 again.

[0027] 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 preheating mechanism for a rubber extruder, comprising a preheating mechanism (2) disposed on a screw extruder (1), characterized in that, The preheating mechanism (2) includes an installation cylinder (201) with an arc-shaped heat exchange plate passing through and fixed on the bottom inner wall, a "V"-shaped guide block (202), and a conveying pipe (203) fixed on one side of the inner wall of the installation cylinder (201). The mounting cylinder (201) is provided with a conveying assembly (3), which includes a conveying motor (302), a mounting shaft (303) connected to the outer wall of one end of the output shaft of the conveying motor (302) via a coupling, and a spiral blade (304) fixed to the outer wall of the mounting shaft (303). The screw extruder (1) is provided with a heat exchange mechanism (4), which includes a heat insulation frame (401) fixed on the outer wall of the screw extruder (1), two fans (402) respectively bolted to one side of the outer wall of the heat insulation frame (401), a mounting plate (403) fixed on the lower inner wall of one side of the heat insulation frame (401), several ceramic heating rods (404) bolted to the top outer wall of the mounting plate (403), a heat conduction plate (405) fixed on the bottom inner wall of the heat insulation frame (401), and several heat sinks (406) fixed on the top outer wall of the heat conduction plate (405). The screw extruder (1) is provided with a feeding mechanism (5) at the feed end. The feeding mechanism (5) includes a feed hopper (501) connected to the top outer wall of the screw extruder (1) by a flange and two circulation pipes (502) respectively fixed on both sides of the mounting cylinder (201) and located on the lower inner wall of the guide block (202).

2. The rubber extruder preheating mechanism according to claim 1, characterized in that, The mounting cylinder (201) is fixed on the top outer wall of the screw extruder (1), and the guide block (202) is fixed on the middle inner wall of the mounting cylinder (201).

3. The rubber extruder preheating mechanism according to claim 1, characterized in that, The mounting cylinder (201) is fixedly provided with a mounting bracket (301) on one side of the outer wall, and the conveying motor (302) is connected to the mounting bracket (301) on one side of the outer wall by bolts. The conveying pipe (203) is fixedly provided with a fixing block (305) on one end of the inner wall, and one end of the mounting shaft (303) passes through and is connected to the fixing block (305) on one side of the outer wall by bearing.

4. The rubber extruder preheating mechanism according to claim 1, characterized in that, The top of the heat insulation frame (401) is fixed on the bottom outer wall of the conveying pipe (203), and the top ends of several ceramic heating rods (404) are respectively connected to the top inner wall of the heat insulation frame (401) by bolts. An air conveying frame (407) is fixed on one inner wall of the heat insulation frame (401), and one end of the air conveying frame (407) is fixed on one inner wall of the mounting cylinder (201).

5. A preheating mechanism for a rubber extruder according to claim 1, characterized in that, The feed hopper (501) is bolted to the top outer wall of the feed end of the screw extruder (1), and one end of the conveying pipe (203) is fixed on the upper inner wall of one side of the feed hopper (501), and one end of the two circulation pipes (502) is fixed on the lower inner wall of both sides of the feed hopper (501).

6. The rubber extruder preheating mechanism according to claim 1, characterized in that, The top outer wall of the feed hopper (501) is connected to a sealing cover (6) by bolts, and an exhaust pipe is fixed on the bottom outer wall of the sealing cover (6). A pressure relief valve is clamped on the outer wall of one end of the exhaust pipe.

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