阅读说明：本技术 一种利用圆形直管制造引射器的方法 (Method for manufacturing ejector by using circular straight pipe ) 是由 吴頔 吴东垠 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种利用圆形直管制造引射器的方法,包括文丘里结构件、引流管和圆形直管,其中引流管与圆形直管采用螺纹连接,文丘里结构件与引流管之间也采用螺纹直接连接。通过将文丘里结构固定在圆形管道内部,使原本恒定不变的圆形横截面变成一个渐缩-喉部-渐扩的典型文丘里结构空间,并在喉部设置圆形通孔,使管内流体流过喉部形成的局部低压能够引射与引流管连通的外部流体,将辅助流体送至圆形管内,使圆形管道实现引射器功能。相较于向直管内送入流体的传统方法,本发明结构更加简单紧凑,改造容易,拆卸方便,并且不需要额外的耗能设备。(The invention discloses a method for manufacturing an ejector by utilizing a circular straight pipe, which comprises a Venturi structural part, a drainage pipe and the circular straight pipe, wherein the drainage pipe is in threaded connection with the circular straight pipe, and the Venturi structural part is also in threaded direct connection with the drainage pipe. Through fixing the venturi structure inside circular pipeline, make invariable circular cross section become a convergent-throat-divergent typical venturi structure space originally to set up circular through-hole in the throat, make the inside fluid flow through the local low pressure that the throat formed can inject the outside fluid with the drainage tube intercommunication, send auxiliary fluid to in the circular pipe, make circular pipeline realize the ejector function. Compared with the traditional method for feeding fluid into the straight pipe, the invention has the advantages of simpler and more compact structure, easy modification and convenient disassembly, and does not need additional energy-consuming equipment.)

1. A method for manufacturing an ejector by utilizing a circular straight pipe is characterized by comprising the following steps: comprises a Venturi structural part (1), a drainage tube (2) and a circular straight tube (3); the Venturi structural part (1) is provided with a front section (11), a middle section (12), a rear section (13), a connecting section (14), an injection hole a (15), an injection hole b (16), an injection hole c (17) and an injection hole d (18); the connecting section (14) is provided with an external thread a (141); a circular boss a (21) and a circular boss b (22) are arranged on the drainage tube (2); a circular boss c (31) is arranged on the circular straight pipe (3); an internal thread hole a (211) is arranged on the circular boss a (21); an external thread b (221) is arranged on the circular boss b (22); the circular boss c (31) is provided with an internal threaded hole b (311).

2. The method of making an eductor with a straight circular tube as set forth in claim 1, wherein: the diffusion section (11) on the Venturi structure member (1) is a conical shell, the outer diameter of the diffusion section is gradually expanded from 20mm to 60mm, the diffusion section is 60mm in length, and the diffusion section is 2mm in thickness; the middle section (12) is a cylindrical shell, the outer diameter is 60mm, the length is 60mm, and the thickness is 2 mm; the rear section (13) is a conical shell, the outer diameter of the conical shell is gradually reduced from 60mm to 20mm, the length of the conical shell is 60mm, and the thickness of the conical shell is 2 mm; the connecting section (14) is a hollow cylinder, has the outer diameter of 20mm, the length of 8mm and the thickness of 2mm, and is provided with an external thread a (141); the front section (11), the middle section (12), the rear section (13) and the connecting section (14) are coaxial; the injection hole a (15), the injection hole b (16), the injection hole c (17) and the injection hole d (18) are circular through holes with the diameter of 6mm, the centers of the injection hole a (15), the injection hole b (16), the injection hole c (17) and the injection hole d (18) are located on the same circular cross section of the middle section (12), the centers of the injection hole a (15), the injection hole b (16), the injection hole c (17) and the injection hole d (18) are evenly distributed around the circumference of the middle section (12), the injection hole a (15) and the injection hole c (17) correspond to the same through hole, and the injection hole b (16) and the injection hole d.

3. The method of making an eductor with a straight circular tube as set forth in claim 1, wherein: the drainage tube (2) is a hollow cylinder, the upper end of the drainage tube is an open end, the lower end of the drainage tube is a closed end, the inner diameter of the drainage tube is 16mm, the thickness of the drainage tube is 2mm, and the overall length of the drainage tube is 135 mm; the drainage tube (2) is provided with a circular boss a (21) and a circular boss b (22); the circular boss a (21) is arranged at the lower end of the drainage tube (2), the circular boss (21) is a hollow cylinder, the inner diameter is 16mm, the outer diameter is 20mm, the height is 8mm, and an internal thread (211) is arranged on the circular boss (21); circular boss b (22) are the ring shape cylinder, and internal diameter 20mm, external diameter 40mm, and highly be 15mm, and the welding is equipped with external screw thread b (221) at the position apart from 60mm of port on drainage tube (2) on circular boss b (22).

4. The method of making an eductor with a straight circular tube as set forth in claim 1, wherein: the circular straight pipe (3) is a hollow cylinder, the inner diameter is 80mm, the thickness is 5mm, and a circular boss c (31) is arranged on the circular straight pipe; the height of the circular boss c (31) is 15mm, the inner diameter is 20mm, the outer diameter is 30mm, and the inner diameter of the circular boss c (31) is provided with an internal thread (311).

5. The method of making an eductor with a straight circular tube as set forth in claim 1, wherein: the circular straight pipe (3) is sequentially in threaded connection with the drainage pipe (2) and the Venturi structural member (1); the circular straight pipe (3) and the drainage pipe (2) are connected with an internal thread hole b (311) at the circular boss c (31) through an external thread b (221) of the circular boss b (22); the drainage tube (2) and the Venturi structure member (1) are connected with an external thread a (141) on the connecting section (14) through an internal thread hole a (211) of the circular boss a (21).

6. The method of making an eductor with a straight circular tube as set forth in claim 1, wherein: the Venturi structure part (1) is arranged inside the circular straight pipe (3), a reducing space is formed between the front section (11) of the Venturi structure part (1) and the circular straight pipe (3), the flow sectional area of the circular straight pipe (3) in the area is gradually reduced from left to right, a small-section annular flow space is formed between the middle section (12) and the circular straight pipe (3), a gradually expanding space is formed between the rear section (13) and the circular straight pipe (3), the flow sectional area of the circular straight pipe (3) in the area is gradually increased from left to right, and a reducing-throat-gradually expanding typical Venturi structure is formed between the Venturi structure part (1) and the circular straight pipe (3); when the intraductal fluid of circular straight tube (3) flows through venturi structure spare (1), will form the low-pressure zone in the space between interlude (12) and circular straight tube (3), through injection hole a (15) that are equipped with on interlude (12), injection hole b (16), injection hole c (17) and injection hole d (18) draw the inside fluid of venturi structure spare (1), and venturi structure spare (1) and drainage tube (2) inside intercommunication, outside draws the fluid and can be constantly inhaled to circular straight tube (3) inside and main fluid mixture through drainage tube (2) upper end, and the fluid mixture will carry out the intensive mixing through the divergent space that forms between back end (13) and circular straight tube (3).

7. The method of making an eductor with a straight circular tube as set forth in claim 1, wherein:

the Venturi structural part (1) is arranged in the circular straight pipe (3), the flow cross section of the circular straight pipe (3) is changed, the circular straight pipe is in fluid connection with the outside through the drainage pipe (2), and a common circular straight pipe (3) is transformed into an ejector with a Venturi structure, so that the common circular straight pipe (3) can have an ejection function; simultaneously, venturi structure spare (1), drainage tube (2) and circular straight tube (3) simple structure all adopt threaded connection, dismantle the convenience.

Technical Field

The invention relates to the technical field of venturis, in particular to a method for manufacturing an ejector by utilizing a circular straight pipe.

Background

The Venturi has a plurality of related fields, including military, energy, agriculture, materials, chemical engineering and the like, can generate a local low-pressure area, and has high application value. The venturi structure is based on the principle that when fluid flows to the throat part through the reducing section, the flow cross section is sharply reduced, the water flow is accelerated and reduced in pressure, and a stable low-pressure area is formed, so that a low-pressure effect is brought, and the venturi structure has a high industrial application value.

The circular straight pipe is very commonly applied in production and life, other liquid is often required to be added into the circular straight pipe for mixing, a three-way structure or a tank body is adopted in the traditional method, and a pump is matched for feeding auxiliary fluid, so that additional mechanical equipment is required for providing power for fluid mixing of the circular straight pipe, and the equipment cost and the energy consumption of mixing are increased. Therefore, a method for manufacturing the ejector by using the circular straight pipe is one of the urgent needs in the field.

Disclosure of Invention

The invention mainly solves the technical problem of providing a method for manufacturing an ejector by using a circular straight pipe, which can transform a common pipeline into the ejector with the ejection function.

In order to solve the technical problems, the invention adopts a technical scheme that:

a method for manufacturing an ejector by utilizing a circular straight pipe comprises a Venturi structural member 1, a drainage pipe 2 and the circular straight pipe 3; the venturi structural member 1 is provided with a front section 11, a middle section 12, a rear section 13, a connecting section 14, an injection hole a15, an injection hole b16, an injection hole c17 and an injection hole d 18; the connecting section 14 is provided with external threads a 141; a circular boss a21 and a circular boss b22 are arranged on the drainage tube 2; a circular boss c31 is arranged on the circular straight pipe 3; the circular boss a21 is provided with an internal thread hole a 211; the round boss b22 is provided with an external thread b 221; the circular boss c31 is provided with an internal threaded hole b 311; the circular straight pipe 3 is sequentially in threaded connection with the drainage pipe 2 and the Venturi structural member 1.

The diffusion section 11 on the Venturi structure member 1 is a conical shell, the outer diameter of the diffusion section is gradually expanded from 20mm to 60mm, the length of the diffusion section is 60mm, and the thickness of the diffusion section is 2 mm; the middle section 12 is a cylindrical shell, the outer diameter is 60mm, the length is 60mm, and the thickness is 2 mm; the rear section 13 is a conical shell, the outer diameter of the rear section is gradually reduced from 60mm to 20mm, the length of the rear section is 60mm, and the thickness of the rear section is 2 mm; the connecting section 14 is a hollow cylinder, has the outer diameter of 20mm, the length of 8mm and the thickness of 2mm, and is provided with an external thread a 141; the front section 11, the middle section 12, the rear section 13 and the connecting section 14 are coaxial; the injection hole a15, the injection hole b16, the injection hole c17 and the injection hole d18 are circular through holes with the diameter of 6mm, the centers of the injection hole a15, the injection hole b16, the injection hole c17 and the injection hole d18 are located on the same circular cross section of the middle section 12 and are uniformly distributed around the circumference of the middle section 12, the injection hole a15 and the injection hole c17 correspond to the same through hole, and the injection hole b16 and the injection hole d18 correspond to the same through hole.

The drainage tube 2 is a hollow cylinder, the upper end of the drainage tube is an open end, the lower end of the drainage tube is a closed end, the inner diameter of the drainage tube is 16mm, the thickness of the drainage tube is 2mm, and the overall length of the drainage tube is 135 mm; the drainage tube 2 is provided with a circular boss a21 and a circular boss b 22; the circular boss a21 is arranged at the lower end of the drainage tube 2, the circular boss a21 is a hollow cylinder with the inner diameter of 16mm, the outer diameter of 20mm and the height of 8mm, and the circular boss a21 is provided with internal threads a 211; circular boss b22 is the ring shape cylinder, and internal diameter 20mm, external diameter 40mm, and highly is 15mm, welds in the position apart from 60mm of drainage tube 2 upper end mouth, is equipped with external screw thread b221 on the circular boss b 22.

The circular straight pipe 3 is a hollow cylinder with the inner diameter of 80mm and the thickness of 5mm, and is provided with a circular boss c 31; the height of the circular boss c31 is 15mm, the inner diameter is 20mm, the outer diameter is 30mm, and the inner diameter of the circular boss c31 is provided with internal threads 311.

The circular straight pipe 3 is sequentially in threaded connection with the drainage pipe 2 and the Venturi structural member 1; the circular straight pipe 3 and the drainage pipe 2 are connected with an internal thread hole b311 at a circular boss c31 through an external thread b221 of the circular boss b 22; the drainage tube 2 and the venturi structural member 1 are connected with the external thread a141 on the connecting section 14 through the internal thread hole a211 of the circular boss a 21.

The venturi structure 1 is installed inside the circular straight tube 3, a reducing space is formed between the front section 11 on the venturi structure 1 and the circular straight tube 3, the flow sectional area of the circular straight tube 3 in the region is gradually reduced from left to right, a small-section circular-ring-shaped flow space is formed between the middle section 12 and the circular straight tube 3, a gradually expanding space is formed between the rear section 13 and the circular straight tube 3, the flow sectional area of the circular straight tube 3 in the region is gradually increased from left to right, and namely a reducing-throat-gradually expanding typical venturi structure is formed between the venturi structure 1 and the circular straight tube 3.

When the connection between the circular straight pipe 3 and the draft tube 2 and the venturi structural member 1 is completed, if the main fluid flows from the left end to the right end of the circular straight pipe 3, the main fluid passes through a reducing space between the front section 11 of the venturi structural member 1 and the circular straight pipe 3, the speed of the main fluid is increased and the pressure is reduced, then the main fluid enters a small flow cross section between the middle section 12 of the venturi structural member 1 and the circular straight pipe 3, the pressure of the main fluid is reduced to the minimum, a low-pressure area is formed in the space, the fluid in the venturi structural member 1 is injected into the circular straight pipe 3 through an injection hole a15, an injection hole b16, an injection hole c17 and an injection hole d18 which are arranged on the middle section 12, the venturi structural member 1 is communicated with the interior of the draft tube 2, namely, the external fluid can be continuously sucked into the middle section 12 of the venturi structural member 1 through the upper end of the draft, The injection hole b16, the injection hole c17 and the injection hole d18 enter the circular straight pipe 3 to be mixed with the main fluid, the mixed fluid passes through a divergent space between the rear section 13 of the Venturi structure 1 and the circular straight pipe 3, the mixed fluid rises back in the space, the speed is reduced, the mixed fluid is fully mixed, and finally the uniformly mixed fluid flows in the circular straight pipe 3; similarly, if the main fluid flows from the right end to the left end of the straight circular pipe 3, the main fluid passes through a tapered space between the rear section 13 of the venturi structural member 1 and the straight circular pipe 3, the speed of the main fluid is increased, the pressure is reduced, then the main fluid enters the small flow cross section between the middle section 12 of the venturi structural member 1 and the straight circular pipe 3, the pressure of the main fluid is reduced to the minimum, a low-pressure area is formed in the space, the fluid in the venturi structural member 1 is injected into the straight circular pipe 3 through the injection hole a15, the injection hole b16, the injection hole c17 and the injection hole d18 arranged on the middle section 12, the venturi structural member 1 is communicated with the interior of the draft tube 2, namely, the external fluid can be continuously sucked into the middle section 12 of the venturi structural member 1 through the upper end of the draft tube 2, and then enters the straight circular pipe 3 through the injection hole a15, the injection hole b16, the injection hole c17 and the injection hole, the mixed fluid passes through the gradually expanding space between the front section 11 of the Venturi structure 1 and the circular straight pipe 3, the pressure of the mixed fluid rises back in the space, the speed is reduced, the mixed fluid is fully mixed, and finally the uniformly mixed fluid flows in the circular straight pipe 3.

The invention has the beneficial effects that:

the invention relates to a method for manufacturing an ejector by utilizing a circular straight pipe.A Venturi structural member is added into the circular straight pipe, so that the original constant circular section in the pipe is changed into a typical Venturi structure with a gradually reduced-throat part-gradually enlarged part, and meanwhile, an ejection hole is arranged at the throat opening section of the Venturi structural member, and fluid is ejected into the pipe according to a certain proportion by utilizing a low-pressure area formed by the fluid flowing through the throat opening section through a drainage pipe, so that the common circular straight pipe can have an ejection function; compared with the traditional method for feeding fluid into the straight pipe, the invention has the advantages of simpler and more compact structure, easy modification and convenient disassembly, and does not need additional energy-consuming equipment.

Drawings

FIG. 1 is an overall outline view of a method of manufacturing an ejector using a straight circular pipe according to the present invention;

FIG. 2 is a diagram of a venturi structure component of a method of making an eductor with a straight circular tube according to the present invention;

FIG. 3 is a view of a draft tube component of a method of making an eductor with a straight circular tube according to the present invention;

FIG. 4 is a circular straight tube part view of a method of manufacturing an injector using a circular straight tube according to the present invention;

FIG. 5 is an assembly view of a draft tube and a circular straight tube according to a method of the present invention for manufacturing an ejector using the circular straight tube;

FIG. 6 is an assembly view of a draft tube and a venturi structure according to a method of the present invention for making an eductor with a straight circular tube;

FIG. 7 is an overall assembly view of a method of making an eductor with a straight circular tube in accordance with the present invention;

fig. 8 is a cross-sectional view of an overall assembly of a method of manufacturing an ejector using a straight circular pipe according to the present invention.

Detailed Description

The invention is further described in detail below with reference to the drawings and the detailed description so that the advantages and features of the invention can be more easily understood by those skilled in the art, and the scope of the invention is more clearly and clearly defined.

A method for manufacturing an ejector by utilizing a circular straight pipe comprises a Venturi structural member 1, a drainage pipe 2 and the circular straight pipe 3; the venturi structural member 1 is provided with a front section 11, a middle section 12, a rear section 13, a connecting section 14, an injection hole a15, an injection hole b16, an injection hole c17 and an injection hole d 18; the connecting section 14 is provided with external threads a 141; a circular boss a21 and a circular boss b22 are arranged on the drainage tube 2; a circular boss c31 is arranged on the circular straight pipe 3; the circular boss a21 is provided with an internal thread hole a 211; the round boss b22 is provided with an external thread b 221; the circular boss c31 is provided with an internal threaded hole b 311; the circular straight pipe 3 is sequentially in threaded connection with the drainage pipe 2 and the Venturi structural member 1.

As a preferred embodiment of the present invention, as shown in fig. 2, the venturi structural member 1 is composed of a front section 11, a middle section 12, a rear section 13, a connecting section 14, an injection hole a15, an injection hole b16, an injection hole c17 and an injection hole d 18; the diffusion section 11 is a conical shell, the outer diameter of the diffusion section is gradually expanded from 20mm to 60mm, the length of the diffusion section is 60mm, and the thickness of the diffusion section is 2 mm; the middle section 12 is a cylindrical shell, the outer diameter is 60mm, the length is 60mm, and the thickness is 2 mm; the rear section 13 is a conical shell, the outer diameter of the rear section is gradually reduced from 60mm to 20mm, the length of the rear section is 60mm, and the thickness of the rear section is 2 mm; the connecting section 14 is a hollow cylinder, has the outer diameter of 20mm, the length of 8mm and the thickness of 2mm, and is provided with an external thread a 141; the front section 11, the middle section 12, the rear section 13 and the connecting section 14 are coaxial; the injection hole a15, the injection hole b16, the injection hole c17 and the injection hole d18 are circular through holes with the diameter of 6mm, the centers of the injection hole a15, the injection hole b16, the injection hole c17 and the injection hole d18 are located on the same circular cross section of the middle section 12 and are uniformly distributed around the circumference of the middle section 12, the injection hole a15 and the injection hole c17 correspond to the same through hole, and the injection hole b16 and the injection hole d18 correspond to the same through hole.

As shown in fig. 3, the draft tube 2 is a hollow cylinder, the upper end is an open end, the lower end is a closed end, the inner diameter is 16mm, the thickness is 2mm, and the overall length is 135 mm; the drainage tube 2 is provided with a circular boss a21 and a circular boss b 22; the circular boss a21 is arranged at the lower end of the drainage tube 2, the circular boss a21 is a hollow cylinder with the inner diameter of 16mm, the outer diameter of 20mm and the height of 8mm, and the circular boss a21 is provided with internal threads a 211; circular boss b22 is the ring shape cylinder, and internal diameter 20mm, external diameter 40mm, and highly is 15mm, welds in the position apart from 60mm of drainage tube 2 upper end mouth, is equipped with external screw thread b221 on the circular boss b 22.

As shown in FIG. 4, the circular straight tube 3 is a hollow cylinder with an inner diameter of 80mm and a thickness of 5mm, and is provided with a circular boss c 31; the height of the circular boss c31 is 15mm, the inner diameter is 20mm, the outer diameter is 30mm, and the inner diameter of the circular boss c31 is provided with internal threads 311.

As shown in fig. 5 and 6, the circular straight pipe 3 is in threaded connection with the drainage pipe 2 and the venturi structural member 1 in sequence; the circular straight pipe 3 and the drainage pipe 2 are connected with an internal thread hole b311 at a circular boss c31 through an external thread b221 of the circular boss b 22; the drainage tube 2 and the venturi structural member 1 are connected with the external thread a141 on the connecting section 14 through the internal thread hole a211 of the circular boss a 21.

As shown in fig. 7 and 8, the venturi structural member 1 is installed inside the circular straight tube 3, a tapering space is formed between the front section 11 of the venturi structural member 1 and the circular straight tube 3, so that the flow cross-sectional area of the circular straight tube 3 in this region is gradually reduced from left to right, a small-section circular-ring-shaped flow space is formed between the middle section 12 and the circular straight tube 3, and a tapering space is formed between the rear section 13 and the circular straight tube 3, so that the flow cross-sectional area of the circular straight tube 3 in this region is gradually increased from left to right, that is, a typical venturi structure of tapering-throat-tapering is formed between the venturi structural member 1 and the circular straight tube 3.

As shown in fig. 8, after the connection between the circular straight tube 3, the draft tube 2 and the venturi structural member 1 is completed, if the main fluid flows from the left end to the right end of the circular straight tube 3, the main fluid passes through the tapered space between the front section 11 of the venturi structural member 1 and the circular straight tube 3, at this time, the speed of the main fluid is increased, the pressure is reduced, then the main fluid enters the small flow cross section between the middle section 12 of the venturi structural member 1 and the circular straight tube 3, at this time, the pressure of the main fluid is reduced to the minimum, a low pressure area is formed in the space, the fluid inside the venturi structural member 1 is injected into the circular straight tube 3 through the injection hole a15, the injection hole b16, the injection hole c17 and the injection hole d18 arranged on the middle section 12, and the venturi structural member 1 is communicated with the inside of the draft tube 2, that is the external fluid can be continuously sucked into the, then the mixed fluid enters the circular straight pipe 3 through the injection hole a15, the injection hole b16, the injection hole c17 and the injection hole d18 to be mixed with the main fluid, the mixed fluid passes through a gradually expanding space between the rear section 13 of the Venturi structure 1 and the circular straight pipe 3, the pressure of the mixed fluid in the space rises, the speed of the mixed fluid is reduced, the mixed fluid is fully mixed, and finally the uniformly mixed fluid flows in the circular straight pipe 3; similarly, if the main fluid flows from the right end to the left end of the straight circular pipe 3, the main fluid passes through a tapered space between the rear section 13 of the venturi structural member 1 and the straight circular pipe 3, the speed of the main fluid is increased, the pressure is reduced, then the main fluid enters the small flow cross section between the middle section 12 of the venturi structural member 1 and the straight circular pipe 3, the pressure of the main fluid is reduced to the minimum, a low-pressure area is formed in the space, the fluid in the venturi structural member 1 is injected into the straight circular pipe 3 through the injection hole a15, the injection hole b16, the injection hole c17 and the injection hole d18 arranged on the middle section 12, the venturi structural member 1 is communicated with the interior of the draft tube 2, namely, the external fluid can be continuously sucked into the middle section 12 of the venturi structural member 1 through the upper end of the draft tube 2, and then enters the straight circular pipe 3 through the injection hole a15, the injection hole b16, the injection hole c17 and the injection hole, the mixed fluid passes through the gradually expanding space between the front section 11 of the Venturi structure 1 and the circular straight pipe 3, the pressure of the mixed fluid rises back in the space, the speed is reduced, the mixed fluid is fully mixed, and finally the uniformly mixed fluid flows in the circular straight pipe 3.

In conclusion, the simple Venturi structural part and the simple drainage tube are added into the circular straight tube, and a typical Venturi injection structure with a gradually reduced-throat part and gradually enlarged is formed in the circular straight tube, so that the circular straight tube is changed into an injector with an injection function, and the effect of adding other fluids into the circular pipeline for mixing is realized on the premise of not adding additional driving equipment; compared with the traditional method for feeding fluid into the straight pipe, the invention has the advantages of simpler and more compact structure, easy modification and convenient disassembly, and does not need additional energy-consuming equipment.