Fluid circulation heat exchange structure

Abstract

The utility model discloses a fluid circulation heat exchange structure, which belongs to the technical field of temperature control of parallel twin-screw extruders, and comprises a screw, a heat exchanger, a heat exchanger and a heat exchanger, the inner sleeve is mounted in the cavity, and one end of the inner sleeve penetrates through the side wall of the cavity and extends to the outside of the cavity; the connecting ring is rotationally connected to the outer side of the screw shaft body and communicates with the cavity; the connecting pipe is rotationally mounted at an opening in one end, positioned outside the cavity, of the inner sleeve and is communicated with the inner sleeve; wherein one end of the inner sleeve, which is positioned in the cavity, is communicated with the cavity, the connecting ring is communicated with an external constant-temperature pool through an external circulating pump, and the connecting pipe is also communicated with the external constant-temperature pool. Raw materials in the feeding area can be heated from the central area, so that the raw materials are heated more uniformly, and the water evaporation effect of the raw materials is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature control of parallel twin-screw extruders, in particular to a fluid circulation heat exchange structure. Background Art

[0002] At present, during the operation of the parallel twin-screw extruder, it is usually necessary to control the temperature of the parallel twin-screw extruder. The temperature setting of each area of ​​the parallel twin-screw extruder needs to be adjusted according to the production process and the characteristics of the raw materials. For example, the feeding zone: the temperature is generally room temperature to 50 ° C, the preheating zone: needs to be about 50 ° C higher than the feeding zone temperature, the melting zone: the temperature range is usually 150 ° C ~ 170 ° C, etc.

[0003] The temperature of the feeding zone is related to the raw materials used. When the raw materials are relatively humid, the temperature can be slightly higher to help evaporate the water and prevent the water from evaporating during the extrusion process and absorbing a large amount of heat, which will cause the melt temperature to drop, thereby affecting the plasticization and extrusion effect of the material, and even causing the extruder to be blocked or the product quality to decline.

[0004] Currently, most parallel twin-screw extruders use a heating method for the feed zone that relies on multiple heating points installed on the barrel, which results in the heated area being in the outer layer. This in turn causes the raw materials located near the screw to be heated less, and the water evaporation effect is also affected. In order to solve the above problems, the utility model provides a fluid circulation heat exchange structure. Utility Model Content

[0005] In response to the above-mentioned technical deficiencies, the purpose of the present invention is to provide a fluid circulation heat exchange structure, in which a cavity and an inner sleeve are set in the screw shaft of part of the feed zone, so that the raw materials inside the feed zone can be heated from the center area, so that the heating is more uniform, thereby improving the effect of moisture evaporation.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a fluid circulation heat exchange structure, comprising:

[0007] A screw, the screw being rotatably mounted inside the barrel, and a cavity for circulating a heat exchange medium being provided in the screw shaft;

[0008] An inner sleeve, wherein the inner sleeve is installed inside the cavity, and the axis of the inner sleeve coincides with the axis of the screw shaft, and one end of the inner sleeve extends through the side wall of the cavity to the outside of the cavity;

[0009] A connecting ring rotatably connected to the outer side of the screw shaft and communicating with the cavity;

[0010] a connecting pipe, the connecting pipe being rotatably mounted at an opening of one end of the inner sleeve located outside the cavity and communicating with the inner sleeve;

[0011] Among them, one end of the inner sleeve located inside the cavity is connected to the cavity, the connecting ring is connected to the external constant temperature pool through an external circulation pump, and the connecting pipe is also connected to the external constant temperature pool.

[0012] Preferably, one end of the inner sleeve located inside the cavity is fixedly connected to the inner wall of the cavity and is provided with a plurality of through openings.

[0013] Preferably, a guide ring for guiding the heat exchange medium toward the through-hole is fixedly connected to the inner side wall of one end of the cavity away from the connecting ring.

[0014] Preferably, a section of the side surface of the screw shaft located inside the connecting ring is provided with a plurality of communication openings.

[0015] Preferably, sealing rings are fixedly connected to both sides of the communication port and located on the shaft of the screw, and a rotational seal is formed between the sealing ring and the inner side surface of the connecting ring.

[0016] Preferably, the end surface of the open end of the inner sleeve located outside the cavity is folded around to form a convex circle, and the connecting pipe is rotatably sealed with the convex circle on the inner sleeve.

[0017] The beneficial effects of the present invention are:

[0018] The utility model realizes that the heat exchange medium heats the raw material between the outer wall of the inner sleeve and the inner wall of the cavity through the arrangement of the cavity and the inner sleeve. The heated heat exchange medium flows into the interior of the inner sleeve through the through-hole and is then discharged through the connecting pipe. The raw material can be heated from the middle position, which significantly improves the evaporation effect of the water in the raw material.

[0019] The utility model realizes that the connecting ring can be kept fixed during the continuous rotation of the screw shaft through the arrangement of the connecting port and the sealing ring, and is not affected by the screw shaft, thereby stably transmitting the heat exchange medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A structural schematic diagram of a fluid circulation heat exchange structure provided in an embodiment of the present utility model.

[0022] Figure 2 It is a cross-sectional view of the present utility model.

[0023] Figure 3 For this utility model Figure 2 A is an enlarged view.

[0024] Figure 4 This is a schematic diagram of the assembly of the connecting ring, connecting pipe and sealing ring of the utility model.

[0025] Description of reference numerals:

[0026] 1. Screw, 2. Cavity, 3. Inner sleeve, 4. Connecting ring, 5. Connecting pipe, 6. Through-hole, 7. Guide ring, 8. Connecting port, 9. Sealing ring, 10. Convex circle. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying 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.

[0028] The utility model provides a fluid circulation heat exchange structure, such as Figures 1 to 4 shown.

[0029] Example 1:

[0030] A fluid circulation heat exchange structure includes a screw 1, which is rotatably installed inside a barrel, and a cavity 2 for circulating a heat exchange medium is provided inside the shaft of the screw 1. An inner sleeve 3 is installed inside the cavity 2, and the axis of the inner sleeve 3 coincides with the axis of the screw 1. One end of the inner sleeve 3 penetrates the side wall of the cavity 2 and extends to the outside of the cavity 2 and is rotatably connected to a connecting pipe 5. The connecting pipe 5 is communicated with an external constant temperature pool. The end of the inner sleeve 3 located inside the cavity 2 is fixedly connected to the inner wall of the cavity 2, and a plurality of through-holes 6 are provided on the side surface of the end of the inner sleeve 3 located inside the cavity 2.

[0031] A connecting ring 4 is rotatably mounted on the shaft of the screw 1, and the connecting ring 4 is connected to the cavity 2 through a plurality of connecting ports 8 opened on the shaft. The connecting ring 4 is connected to the external constant temperature pool through an external circulation pump. Under the action of the circulation pump, the heat exchange medium can flow through the connecting ring 4, the cavity 2, the through port 6, the inner sleeve 3 and the connecting pipe 5 in sequence to re-enter the interior of the constant temperature pool, so that the heat exchange medium can continuously heat the raw materials inside the feed area. The heat exchange medium can be commonly used oil or water, and the constant temperature pool can be heated to keep the heat exchange medium inside it at a certain temperature.

[0032] Example 2:

[0033] Sealing rings 9 are fixedly connected to both sides of the connecting port 8 and on the outside of the screw 1 shaft. The sealing ring 9 and the inner side of the connecting ring 4 fit together, and the sealing ring 9 and the connecting ring 4 are rotated and sealed, so that the screw 1 will not affect the connecting ring 4 during the rotation process, so that the connecting ring 4 can maintain stable communication with the external constant temperature pool, so that the heat exchange medium can flow stably.

[0034] The end surface of the open end of the inner sleeve 3 outside the cavity 2 is folded around to form a convex circle 10, and an annular groove adapted to the convex circle 10 is provided on the connecting pipe 5. The convex circle 10 is rotatably sealed with the annular groove on the connecting pipe 5 through a sealing ring and other structures, so that the inner sleeve 3 will not affect the connecting pipe 5 during the rotation of the screw 1, so that the connecting pipe 5 can maintain stable communication with the external constant temperature pool, so that the heat exchange medium can flow stably.

[0035] Example 3:

[0036] On the basis of Example 1, in order to allow the heat exchange medium inside the cavity 2 to flow better to the interior of the inner sleeve 3, a guide ring 7 is fixedly connected to the inner wall of the end of the cavity 2 away from the connecting ring 4. The outer diameter of the guide ring 7 is adapted to the inner diameter of the cavity 2. The inner ring surface of the guide ring 7 is a concave arc surface, which can guide the heat exchange medium and divert the heat exchange medium to the through-hole 6, so that the heat exchange medium can better flow to the interior of the inner sleeve 3.

[0037] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A fluid circulation heat exchange structure, characterized in that: include: A screw (1), the screw (1) being rotatably mounted inside the barrel, and a cavity (2) for circulating a heat exchange medium is provided in the shaft of the screw (1); An inner sleeve (3), the inner sleeve (3) being installed inside the cavity (2), and the axis of the inner sleeve (3) being coincident with the axis of the shaft of the screw (1), and one end of the inner sleeve (3) passing through the side wall of the cavity (2) and extending to the outside of the cavity (2); A connecting ring (4), the connecting ring (4) is rotatably connected to the outside of the shaft of the screw (1) and communicates with the cavity (2); a connecting pipe (5), the connecting pipe (5) being rotatably mounted on an opening at one end of the inner sleeve (3) located outside the cavity (2) and communicating with the inner sleeve (3); One end of the inner sleeve (3) located inside the cavity (2) is in communication with the cavity (2), the connecting ring (4) is in communication with an external constant temperature pool via an external circulation pump, and the connecting pipe (5) is also in communication with the external constant temperature pool.

2. A fluid circulation heat exchange structure according to claim 1, characterized in that: One end of the inner sleeve (3) located inside the cavity (2) is fixedly connected to the inner wall of the cavity (2) and is provided with a plurality of through openings (6).

3. A fluid circulation heat exchange structure according to claim 2, characterized in that: A guide ring (7) for guiding the heat exchange medium toward the through-hole (6) is fixedly connected to the inner side wall of one end of the cavity (2) away from the connecting ring (4).

4. The fluid circulation heat exchange structure according to claim 1, characterized in that: A section of the side surface of the shaft of the screw (1) located inside the connecting ring (4) is provided with a plurality of communication openings (8).

5. A fluid circulation heat exchange structure according to claim 4, characterized in that: Sealing rings (9) are fixedly connected to both sides of the communication port (8) and on the shaft of the screw (1), and a rotational seal is formed between the sealing ring (9) and the inner side surface of the connecting ring (4).

6. The fluid circulation heat exchange structure according to claim 1, characterized in that: The end surface of the open end of the inner sleeve (3) located outside the cavity (2) is folded around to form a convex circle (10), and the connecting pipe (5) and the convex circle (10) on the inner sleeve (3) are rotatably sealed.

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