CN214872562U

CN214872562U - Double-screw extruder

Info

Publication number: CN214872562U
Application number: CN202121407041.4U
Authority: CN
Inventors: 段玉豪; 李迎军; 史永兴; 王中
Original assignee: Henan Shuguang Biotechnology Co ltd
Current assignee: Henan Shuguang Biotechnology Co ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2021-11-26
Anticipated expiration: 2031-06-23

Abstract

The utility model relates to a food processing equipment technical field discloses a double screw extruder, including barrel and the double screw of setting in the barrel, the one end of barrel is equipped with the feed inlet, the other end is equipped with the extrusion mouth, barrel outside cover is equipped with the cooling shell, is equipped with inlet tube and outlet pipe on the cooling shell, and barrel outer wall and cooling shell inner wall form the cooling chamber, are equipped with the flight in the cooling chamber, the inboard of flight and the outside of barrel outer wall fixed connection, flight and the inner wall fixed connection of cooling shell. The device makes the cooling water spiral through the cooling chamber through set up flight and cooling shell outside the barrel, has increased the stroke of cooling water in the cooling chamber to increased the area of contact of cooling water with the barrel, effectively improved the radiating efficiency of barrel.

Description

Double-screw extruder

Technical Field

The utility model relates to a food processing equipment technical field, in particular to double screw extruder.

Background

Twin screw extruders are a common food processing device and are commonly used to uniformly mix various materials to match subsequent food processing operations. The main structure of the double-screw extruder is a machine barrel and a double-screw mechanism which is rotationally arranged in the machine barrel, the materials are mixed when moving in the machine barrel under the shearing and extruding actions of the double screws, and friction heat and shearing heat are generated simultaneously to heat the materials. When the temperature of the material is too high, part of nutrients in the material can be decomposed or denatured, so that the nutritional value of the product is reduced, and therefore, a certain cooling measure needs to be adopted to cool the machine barrel.

In a conventional twin-screw extruder, a cylinder is cooled by water cooling, and for example, patent document No. CN208469007U discloses a cylinder cooling device for a twin-screw extruder, in which a circulation pipe is provided around the circumference of the cylinder, and cooling water is continuously supplied into the circulation pipe to cool the cylinder. Although the device can realize the effect of cooling the machine barrel, the cooling water needs to absorb the heat conducted by the machine barrel through the pipe wall of the circulating pipe, the direct contact area of the circulating pipe and the machine barrel is limited, and part of the heat needs to be conducted through air, so that the heat exchange efficiency is greatly reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a twin-screw extruder, which can increase the direct contact area between the cooling water and the barrel, thereby effectively improving the heat exchange efficiency of the barrel.

In order to achieve the above object, the present invention is realized by the following technical solutions:

the utility model provides a double screw extruder, includes barrel and the double screw of setting in the barrel, and the one end of barrel is equipped with the feed inlet, the other end is equipped with the extrusion mouth, barrel outside cover is equipped with the cooling shell, is equipped with inlet tube and outlet pipe on the cooling shell, and barrel outer wall and cooling shell inner wall form the cooling chamber, are equipped with the flight in the cooling chamber, the inboard and barrel outer wall fixed connection of flight, the outside of flight and the inner wall fixed connection of cooling shell.

This device is through setting up the flight in the cooling chamber, sets up the cooling chamber into a helical channel that only allows cooling water to pass through around the spiral of barrel lateral wall, and the cooling water is direct to absorb the heat with the barrel contact, and compares in ordinary cooling jacket, and the setting of flight has prolonged the stroke of cooling water in the cooling chamber to can once absorb more heats, improve heat exchange efficiency. Meanwhile, the spiral piece is fixedly connected with the outer wall of the machine barrel, the spiral piece also plays a role of a radiating fin, the radiating area of the machine barrel is increased, and therefore the radiating efficiency of the machine barrel is further improved.

Furthermore, the water inlet pipe is arranged at one end of the cooling shell close to the extrusion port, and the water outlet pipe is arranged at one end of the cooling shell close to the feeding port. The arrangement enables the flowing direction of the cooling water to be opposite to the moving direction of the materials, so that the heat exchange efficiency is improved.

Further, the flight divide into anterior segment flight, middle section flight and back end flight according to the direction from the extrusion mouth of barrel to the feed inlet, and the pitch of three increases in proper order. Because the accumulation of heat in the material, it is higher more to be close to the material temperature of crowded exit end more usually, through setting up anterior segment flight, middle section flight and the back end flight that the pitch increases in proper order, can make the velocity of flow of cooling water being close to crowded exit end faster, and heat exchange efficiency is higher to avoid the crowded exit end high temperature of barrel.

Further, be equipped with the water purifier on the inlet tube, the water purifier can purify the cooling water that gets into in the cooling chamber to prevent that scale deposit influences heat exchange efficiency in the cooling shell.

The utility model discloses in still including other subassemblies that can make this twin-screw extruder normal use, for example the frame that is used for placing the barrel for drive twin-screw pivoted motor to and for subassembly such as pipeline, the water pump that this device continuously provided the cooling water, all belong to the conventional selection in this field. In addition, the device or the component which is not limited in the utility model adopts the conventional means in the field, for example, the machine barrel, the twin-screw, the feed inlet, the extrusion opening, the cooling shell, the water inlet pipe, the water outlet pipe and the water purifier are all arranged conventionally.

Compared with the prior art, the beneficial effects of the utility model are that:

this device makes the cooling water spiral pass through the cooling chamber through set up flight and cooling shell outside the barrel, has increased the stroke of cooling water in the cooling chamber to increased the area of contact of cooling water with the barrel, effectively improved the radiating efficiency of barrel.

Drawings

FIG. 1 is a schematic view of a twin-screw extruder in the example.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "left", "middle", "right", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description, but do not indicate or limit that the indicated device or element must be constructed and operated in a specific orientation.

Examples

As shown in figure 1, the double-screw extruder comprises a machine barrel 1 and double screws arranged in the machine barrel, wherein a feed inlet 2 is formed in one end of the machine barrel 1, an extrusion outlet 3 is formed in the other end of the machine barrel 1, a cooling shell 4 is sleeved on the outer side of the machine barrel 1, a water inlet pipe 5 and a water outlet pipe 6 are arranged on the cooling shell 4, a cooling cavity is formed by the outer wall of the machine barrel 1 and the inner wall of the cooling shell 4, spiral sheets are arranged in the cooling cavity, the inner sides of the spiral sheets are fixedly connected with the outer wall of the machine barrel 1, and the outer sides of the spiral sheets are fixedly connected with the inner wall of the cooling shell 4.

The inlet tube 5 sets up the one end that is close to the extrusion opening 3 at cooling shell 4, outlet pipe 6 sets up the one end that is close to feed inlet 2 at cooling shell 4.

The flight is divided into a front section flight 7, a middle section flight 8 and a rear section flight 9 according to the direction from the extrusion opening 3 of the machine barrel 1 to the feed inlet 2, and the screw pitches of the front section flight, the middle section flight and the rear section flight are increased in sequence.

A water purifier (not shown) is provided on the water inlet pipe 5.

The foregoing description of the embodiments of the invention has been presented for purposes of illustration and not limitation, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.

Claims

1. The utility model provides a double screw extruder, includes barrel and the double screw of setting in the barrel, and the one end of barrel is equipped with the feed inlet, and the other end is equipped with the extrusion opening, its characterized in that, barrel outside cover is equipped with the cooling shell, is equipped with inlet tube and outlet pipe on the cooling shell, and barrel outer wall and cooling shell inner wall form the cooling chamber, are equipped with the flight in the cooling chamber, the inboard and barrel outer wall fixed connection of flight, the outside of flight and the inner wall fixed connection of cooling shell.

2. The twin screw extruder of claim 1, wherein the water inlet pipe is disposed at an end of the cooling jacket near the extrusion port, and the water outlet pipe is disposed at an end of the cooling jacket near the feed port.

3. The twin-screw extruder as claimed in claim 2, wherein the flights are divided into a front flight, a middle flight and a rear flight in the direction from the outlet to the inlet of the barrel, and the pitches of the three are increased in this order.

4. The twin screw extruder of claim 1, wherein a water purifier is provided on the water inlet pipe.