Rotational flow tube prepared from composite material and preparation method of rotational flow tube

Abstract

The invention provides a rotational flow pipe prepared from a composite material and a preparation method of the rotational flow pipe, and belongs to the field of rotational flow pipe preparation. The preparation method comprises the following steps: S1, preparing a cyclone pipe core mold, and coating the surface of the cyclone pipe core mold with a release agent; s2, a reinforced fiber fabric is woven on the cyclone pipe core mold through a weaving machine, and a cyclone pipe prefabricated body is formed; s3, after weaving of the cyclone pipe preform is completed, vacuum infusion forming is conducted; and S4, after the cyclone pipe prefabricated body is formed, demolding is conducted through a demolding machine, and therefore the formed cyclone pipe prefabricated body is separated from the cyclone pipe core mold. The rotational flow pipe is prepared in the mode that the reinforced fiber fabric is woven and cured, compared with a rotational flow pipe made of a metal material, the complex machining, connecting and other procedures are omitted, integral forming is achieved, a rotational flow pipe core mold is easy to manufacture, the process quality is stable, repeated use can be achieved, and the production cost is reduced. And the yield can be improved by increasing the number of the cyclone pipe core molds.

Description

Technical Field

[0001] The invention belongs to the field of cyclone preparation, and in particular relates to a cyclone tube made of composite materials and a preparation method thereof. Background Art

[0002] The cyclone in the oil field uses the density difference between the two liquids to separate the oil droplets from the water with the help of centrifugal force in the variable diameter cyclone tube. The structure of the oil field cyclone tube consists of four rotating bodies: the inlet section, the contraction section, the separation section, and the outlet straight pipe section, which are connected in sequence. At this time, these four sections are also called: vortex chamber section (i.e. section D), large cone section (i.e. section C), small cone section (i.e. section B), tail straight pipe section (i.e. section A), where sections A and D are both cylindrical sections, sections B and C are both conical sections, section D has the largest diameter, and section A has the smallest diameter (see the attached figure in the specification) Figure 3 ).

[0003] Currently, swirl tubes are mostly made of stainless steel and formed by mechanical processing. Swirl tubes are generally slender structures (the longest length can reach 2m, generally around 1.5m), and sections B and C are conical sections, which makes processing very difficult and the scrap rate remains high, directly increasing the production cost of the enterprise.

[0004] Therefore, the current disadvantages of the swirl tube are that the slender swirl tube is difficult to process and has a high scrap rate, which leads to high production costs for enterprises. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a cyclone tube made of composite materials and a preparation method thereof, so as to solve the problem that the slender cyclone tube in the prior art is difficult to process and has a high scrap rate, resulting in high production costs for enterprises.

[0006] To achieve the above-mentioned and other related purposes, the present invention provides a method for preparing a cyclone tube from a composite material, comprising: S1: prepare a cyclone tube core mold and apply a release agent on the surface of the cyclone tube core mold; S2: weaving the reinforced fiber fabric on the cyclone tube core mold by a weaving machine to form a cyclone tube preform; S3: After the cyclone tube preform is woven, vacuum induction molding is performed; S4: After the cyclone tube preform is formed, it is demolded by a demoulding machine, so that the formed cyclone tube preform is separated from the cyclone tube core mold.

[0007] As an optional scheme, in the step S1, the vortex tube core mold includes a vortex chamber section core mold, a large cone section core mold, a small cone section core mold and a tail straight pipe section core mold, and the vortex chamber section core mold, the large cone section core mold, the small cone section core mold and the tail straight pipe section core mold are integrally formed, or the vortex chamber section core mold, the large cone section core mold, the small cone section core mold and the tail straight pipe section core mold are spliced ​​and formed.

[0008] As an optional solution, in step S1, the specific method of applying the release agent to the surface of the vortex tube core mold is: applying the release agent to the surface of the vortex tube core mold at least 3 times, with an interval of at least 20 minutes between each application.

[0009] As an optional solution, in step S2, the cyclone tube core mold is mounted on a moving element, and the moving element drives the cyclone tube core mold to move along its axis at a constant speed.

[0010] As an optional solution, in step S2, the reinforced fiber fabric is woven on the vortex tube core mold by a braiding machine, the braiding speed of the vortex chamber section core mold is V4, the braiding speed of the large cone section core mold is V3, the braiding speed of the small cone section core mold is V2, and the braiding speed of the tail straight pipe section core mold is V1, V1 <V2<V3<V4。

[0011] As an optional solution, when weaving the large cone section core mold, due to the large change in diameter of this section of the core mold, the moving element is paused at the beginning of the large cone section core mold, and the braiding machine weaves a distance on the large cone section core mold at a speed of V2, then starts the moving element to continue to drive the vortex tube core mold to move, and makes the braiding machine weave the large cone section core mold at a speed of V3.

[0012] As an optional solution, the braiding machine braids at a speed V2 on the large cone section core mold over a distance of 15mm-25mm.

[0013] As an optional solution, the operation of step S2 is repeated at least twice, so as to weave at least two layers of the cyclone tube preform on the cyclone tube core mold, thereby achieving weaving forming of the cyclone tube preform.

[0014] As an optional solution, in step S3, the specific steps of the vacuum induction molding are: The surface of the braided cyclone tube preform is covered with a demoulding cloth, a guide net and a vacuum bag in sequence, and a glue inlet is arranged in the middle and glue outlets are arranged at both ends; The vacuum bag is packaged and then evacuated. After the pressure holding test, glue injection begins. When resin flows out of the glue outlets at both ends, all glue outlets and glue inlets are closed and placed in a curing oven for heating and curing.

[0015] The present invention provides a cyclone tube made of a composite material, which is obtained by adopting the above-mentioned preparation method.

[0016] As described above, the cyclone tube made of composite material and the preparation method thereof proposed in the present invention have at least the following beneficial effects: 1. The present application realizes the preparation of the cyclone tube by weaving and curing the reinforced fiber fabric. Compared with the cyclone tube made of metal, the present application eliminates the complicated machining and connection processes, and the cyclone tube is integrally formed. The cyclone tube core mold is simple to manufacture, the process quality is stable, and it can be reused. In addition, the number of cyclone tube core molds can be increased to improve the yield. 2. The present application can also further reduce the difficulty of making the vortex tube core mold and further improve the yield rate by arranging the vortex chamber section core mold, the large cone section core mold, the small cone section core mold and the tail straight pipe section core mold into a splicing molding; 3. Since the cyclone tube is mainly used to treat sewage, general sewage contains some impurities such as acids, alkalis, salts, alcohols, ketones, etc., which will cause oxidation reactions and other corrosion to the metal cyclone tube. After long-term use, the working surface (inner wall) of the metal cyclone tube will have corrosion marks (pits and grooves, etc.). The cyclone tube prepared by the composite material in this application has better corrosion resistance and can extend the service life of the cyclone tube; 4. The cyclone tube made of metal is sensitive to the temperature environment and has a high thermal expansion coefficient, which is not suitable for long-term use in a high temperature environment. In addition, the metal material has a high density and the product is heavy, which limits the application and service life of the metal cyclone tube. The cyclone tube prepared by the composite material in this application has better heat resistance while ensuring its strength, lower thermal expansion coefficient and heat capacity, and lighter weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic structural diagram of a cyclone tube core mold of the present invention; Figure 2 It shows a schematic diagram of the structure of the braiding machine and the cyclone tube core mold of the present invention; Figure 3 Shown is a schematic diagram of the structure of an existing cyclone tube made of stainless steel.

[0018] In the figure: 1, swirl tube core mold; 11, swirl chamber section core mold; 12, large cone section core mold; 13, small cone section core mold; 14, tail straight pipe section core mold; 21. Braiding machine; 22. Moving element. DETAILED DESCRIPTION

[0019] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0020] See also Figures 1 to 3. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0021] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0022] In Example 1, a 1530 mm long cyclone tube was prepared as an example. See also Figure 1 to Figure 2 The present invention provides a method for preparing a cyclone tube using a composite material, comprising: S1: preparing a cyclone tube core mold 1 and applying a release agent on the surface of the cyclone tube core mold 1; In the step S1, the vortex tube core mold 1 includes a vortex chamber section core mold 11, a large cone section core mold 12, a small cone section core mold 13 and a tail straight pipe section core mold 14, and the vortex chamber section core mold 11, the large cone section core mold 12, the small cone section core mold 13 and the tail straight pipe section core mold 14 are integrally formed, wherein the tail straight pipe section core mold 14 is 730 mm long and 12 mm in diameter, the small cone section core mold 13 is 480 mm long and has a linear diameter change from 12 mm to 25 mm, the large cone section core mold 12 is 70 mm long and has a linear diameter change from 25 mm to 50 mm, the vortex chamber section core mold 11 is 250 mm long and has a diameter of 50 mm and other diameters, the vortex chamber section core mold 11, the large cone section core mold 12, the small cone section core mold 13 and the tail straight pipe section core mold 14 are integrally formed, and the precision of the vortex tube core mold 1 can be enhanced by integrally forming; In order to facilitate weaving and molding, an M24 internal thread is processed at the tail of the vortex chamber section core mold 11, and then an M24 external thread mandrel is added for thread connection to facilitate clamping and weaving; In the step S1, the specific method of applying the release agent to the surface of the cyclone tube core mold 1 is: applying the release agent to the surface of the cyclone tube core mold 1 at least 3 times, with an interval of at least 20 minutes between each application.

[0023] S2: Weaving the reinforcing fiber fabric on the cyclone core mold 1 through a weaving machine 21 to form a cyclone preform, wherein the reinforcing fiber fabric may be one or more of glass fiber, quartz fiber, basalt fiber, carbon fiber, and aramid fiber; In this embodiment, a spherical braiding machine is used to perform three-dimensional braiding with carbon fiber, the carbon fiber is Zhongfu Shenying T700 grade, 12K yarn, and the total number of spindles is 144 spindles; In the step S2, the cyclone tube core mold 1 is installed on the moving element 22, and the moving element 22 drives the cyclone tube core mold 1 to move along its axis at a constant speed, and the speed at which the moving element 22 drives the cyclone tube core mold 1 to move is 2.5 mm / s. The moving element 22 is not limited here, and is mainly capable of driving the cyclone tube core mold 1 to move, and can be a manipulator or a moving slide; In the step S2, the reinforced fiber fabric is woven on the cyclone tube core mold 1 by a braiding machine 21, the braiding speed of the vortex chamber section core mold 11 is V4, V4 can be 8 rad / s, the braiding speed of the large cone section core mold 12 is V3, V3 can be 7 rad / s, the braiding speed of the small cone section core mold 13 is V2, V2 can be 6 rad / s, and the braiding speed of the tail straight pipe section core mold 14 is V1, V1 can be 5 rad / s, V1 can be 10 rad / s, and V1 can be 15 rad / s. <V2<V3<V4; When the large cone section core mold 12 is braided, due to the large change in diameter of the core mold, the moving element 22 is paused at the start of the large cone section core mold 12, and the braiding machine 21 braids a distance of 15 mm on the large cone section core mold 12 at a speed of V2 (i.e., a speed of 6 rad / s), and the moving element 22 is started to continue to drive the cyclone tube core mold 1 to move, and the braiding machine 21 braids the large cone section core mold 12 at a speed of V3 (i.e., a speed of 7 rad / s); Repeat the operation of step S2 at least twice, so as to weave at least two layers of cyclone tube preform on the cyclone tube core mold 1, thereby realizing the weaving forming of the cyclone tube preform. After the weaving of one layer of cyclone tube preform is completed, it is tightened with a rolling belt, and the weaving of the second layer of cyclone tube preform is started.

[0024] S3: After the cyclone tube preform is woven, vacuum induction molding is performed; During vacuum induction molding: the surface of the braided cyclone tube preform is covered with a demoulding cloth, a guide net and a vacuum bag in sequence, and a glue inlet is arranged in the middle and glue outlets are arranged at both ends; the vacuum bag is packaged and then evacuated, and glue injection is started after the pressure holding test. When resin flows out of the glue outlets at both ends, all the glue outlets and glue inlets are closed, and the preform is placed in a curing furnace for heating and curing; During vacuum infusion molding, Huibo ML541 epoxy resin is used as the resin. After mixing with an amine curing agent at 25°C, the viscosity is about 200-300 mpaos, and the gel time is about 5-7 hours.

[0025] S4: After the cyclone tube preform is formed, it is demoulded by a demoulding machine, so that the formed cyclone tube preform is separated from the cyclone tube core mold 1.

[0026] In Example 2, a 1530 mm long cyclone tube was prepared as an example. See also Figure 1 to Figure 2 The present invention provides a method for preparing a cyclone tube using a composite material, comprising: S1: preparing a cyclone tube core mold 1 and applying a release agent on the surface of the cyclone tube core mold 1; In the step S1, the vortex tube core mold 1 includes a vortex chamber section core mold 11, a large cone section core mold 12, a small cone section core mold 13 and a tail straight pipe section core mold 14, and the vortex chamber section core mold 11, the large cone section core mold 12, the small cone section core mold 13 and the tail straight pipe section core mold 14 are spliced ​​and formed, wherein the tail straight pipe section core mold 14 is 730 mm long and 12 mm in diameter, the small cone section core mold 13 is 480 mm long and has a diameter that is linearly variable from 12 mm to 25 mm, the large cone section core mold 12 is 70 mm long and has a diameter that is linearly variable from 25 mm to 50 mm, and the vortex chamber section core mold 11 is 250 mm long and has a diameter of 50 mm The diameter is equal, and the tail straight pipe section core mold 14 and the small cone section core mold 13 can be integrally formed, and the large cone section core mold 12 and the vortex chamber section core mold 11 are integrally formed, wherein the small cone section core mold 13 and the large cone section core mold 12 are connected by threads, that is, a stud is fixed on the small cone section core mold 13, and a threaded hole is provided on the large cone section core mold 12, and the stud and the threaded hole are threadedly connected; the tail straight pipe section core mold 14, the small cone section core mold 13 and the large cone section core mold 12 can be integrally formed, and the large cone section core mold 12 and the vortex chamber section core mold 11 are connected by threads, that is, a stud is fixed on the large cone section core mold 12, and a threaded hole is provided on the vortex chamber section core mold 11. A threaded hole is provided on the top, and the stud is threadedly connected with the threaded hole; the small cone section core mold 13, the large cone section core mold 12 and the vortex chamber section core mold 11 can also be integrally formed, and the tail straight pipe section core mold 14 is threadedly connected with the small cone section core mold 13, that is, the tail straight pipe section core mold 14 is fixed with a stud, and the small cone section core mold 13 is provided with a threaded hole, and the stud is threadedly connected with the threaded hole; the tail straight pipe section core mold 14, the small cone section core mold 13, the large cone section core mold 12 and the vortex chamber section core mold 11 can also be separated, and during production, they are spliced ​​into the entire vortex tube core mold 1, and the processing difficulty can be reduced by splicing molding; In order to facilitate weaving and molding, an M24 internal thread is processed at the tail of the vortex chamber section core mold 11, and then an M24 external thread mandrel is added for thread connection to facilitate clamping and weaving; In the step S1, the specific method of applying the release agent to the surface of the cyclone tube core mold 1 is: applying the release agent to the surface of the cyclone tube core mold 1 at least 3 times, with an interval of at least 20 minutes between each application.

[0027] S2: Weaving the reinforcing fiber fabric on the cyclone core mold 1 through a weaving machine 21 to form a cyclone preform, wherein the reinforcing fiber fabric may be one or more of glass fiber, quartz fiber, basalt fiber, carbon fiber, and aramid fiber; In this embodiment, a spherical braiding machine is used to perform three-dimensional braiding with carbon fiber, the carbon fiber is Zhongfu Shenying T700 grade, 12K yarn, and the total number of spindles is 144 spindles; In the step S2, the cyclone tube core mold 1 is installed on the moving element 22, and the moving element 22 drives the cyclone tube core mold 1 to move along its axis at a constant speed, and the speed at which the moving element 22 drives the cyclone tube core mold 1 to move is 2.5 mm / s. The moving element 22 is not limited here, and is mainly capable of driving the cyclone tube core mold 1 to move, and can be a manipulator or a moving slide; In step S2, the reinforced fiber fabric is woven on the cyclone tube core mold 1 by a braiding machine 21, the braiding speed of the vortex chamber section core mold 11 is V4, V4 can be 8 rad / s, the braiding speed of the large cone section core mold 12 is V3, V3 can be 7 rad / s, the braiding speed of the small cone section core mold 13 is V2, V2 can be 6 rad / s, and the braiding speed of the tail straight pipe section core mold 14 is V1, V1 can be 5 rad / s, V1 can be 10 rad / s, and V1 can be 20 rad / s. <V2<V3<V4; When the large cone section core mold 12 is braided, due to the large change in diameter of the core mold, at the beginning of the large cone section core mold 12, the moving element 22 is paused, and the braiding machine 21 braids a distance of 25 mm on the large cone section core mold 12 at a speed of V2 (i.e., a speed of 6 rad / s), and the moving element 22 is started to continue to drive the cyclone tube core mold 1 to move, and the braiding machine 21 braids the large cone section core mold 12 at a speed of V3 (i.e., a speed of 7 rad / s); Repeat the operation of step S2 at least twice, so as to weave at least two layers of cyclone tube preform on the cyclone tube core mold 1, thereby realizing the weaving forming of the cyclone tube preform. After the weaving of one layer of cyclone tube preform is completed, it is tightened with a rolling belt, and the weaving of the second layer of cyclone tube preform is started.

[0028] S3: After the cyclone tube preform is woven, vacuum induction molding is performed; During vacuum induction molding: the surface of the braided cyclone tube preform is covered with a demoulding cloth, a guide net and a vacuum bag in sequence, and a glue inlet is arranged in the middle and glue outlets are arranged at both ends; the vacuum bag is packaged and then evacuated, and glue injection is started after the pressure holding test. When resin flows out of the glue outlets at both ends, all the glue outlets and glue inlets are closed, and the preform is placed in a curing furnace for heating and curing; During vacuum infusion molding, Huibo ML541 epoxy resin is used as the resin. After mixing with an amine curing agent at 25°C, the viscosity is about 200-300 mpaos, and the gel time is about 5-7 hours.

[0029] S4: After the cyclone tube preform is formed, it is demoulded by a demoulding machine, so that the formed cyclone tube preform is separated from the cyclone tube core mold 1.

[0030] A cyclone tube made of composite material, which is obtained by the above-mentioned preparation method.

[0031] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for preparing a cyclone tube from a composite material, characterized in that: include: S1: prepare a cyclone tube core mold and apply a release agent on the surface of the cyclone tube core mold; S2: weaving the reinforced fiber fabric on the cyclone tube core mold by a weaving machine to form a cyclone tube preform; S3: After the cyclone tube preform is woven, vacuum induction molding is performed; S4: After the cyclone tube preform is formed, the demoulding machine is used to demould the preform, so that the formed cyclone tube preform is separated from the cyclone tube core mold; In the step S1, the vortex tube core mold includes a vortex chamber section core mold, a large cone section core mold, a small cone section core mold and a tail straight pipe section core mold, and the vortex chamber section core mold, the large cone section core mold, the small cone section core mold and the tail straight pipe section core mold are integrally formed, or the vortex chamber section core mold, the large cone section core mold, the small cone section core mold and the tail straight pipe section core mold are spliced ​​and formed; In step S2, the reinforced fiber fabric is woven on the vortex tube core mold by a braiding machine, the braiding speed of the vortex chamber section core mold is V4, the braiding speed of the large cone section core mold is V3, the braiding speed of the small cone section core mold is V2, and the braiding speed of the tail straight pipe section core mold is V1, V1 <V2<V3<V4。 2. The method for preparing a cyclone tube from a composite material according to claim 1, characterized in that: In the step S1, the specific method of applying the release agent to the surface of the cyclone tube core mold is: applying the release agent to the surface of the cyclone tube core mold at least 3 times, with an interval of at least 20 minutes between each application.

3. The method for preparing a cyclone tube from a composite material according to claim 1, characterized in that: In the step S2, the cyclone tube core mold is mounted on a moving element, and the moving element drives the cyclone tube core mold to move along its axis at a constant speed.

4. The method for preparing a cyclone tube from a composite material according to claim 1, characterized in that: When weaving the large cone section core mold, due to the large change in diameter of the core mold, the moving element pauses at the beginning of the large cone section core mold. After the braiding machine weaves a distance on the large cone section core mold at a speed of V2, the moving element is started to continue to drive the vortex tube core mold to move, and the braiding machine weaves the large cone section core mold at a speed of V3.

5. The method for preparing a cyclone tube from a composite material according to claim 4, characterized in that: The braiding machine braids at a speed V2 on the large cone section core mold for a distance of 15mm-25mm.

6. The method for preparing a cyclone tube from a composite material according to claim 1, characterized in that: The operation of step S2 is repeated at least twice, so that at least two layers of the cyclone tube preform are woven on the cyclone tube core mold, thereby achieving the weaving forming of the cyclone tube preform.

7. The method for preparing a cyclone tube from a composite material according to claim 1, characterized in that: In step S3, the specific steps of vacuum induction molding are: The surface of the braided cyclone tube preform is covered with a demoulding cloth, a guide net and a vacuum bag in sequence, and a glue inlet is arranged in the middle and glue outlets are arranged at both ends; The vacuum bag is packaged and then evacuated. After the pressure holding test, glue injection begins. When resin flows out of the glue outlets at both ends, all glue outlets and glue inlets are closed and placed in a curing oven for heating and curing.

8. A cyclone tube made of composite material, characterized in that: The method is obtained by the preparation method according to any one of claims 1 to 7.

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