Miniature ducted vacuum generator

Abstract

The utility model discloses a micro - pipeline formula vacuum generator, including the tubular body, be located the compressed air air inlet of one end of tubular body, be located the exhaust port of another end of tubular body and be located vacuum port at one side of tubular body, the tubular body includes first work section, second work section, third work section and fourth work section and the first necking portion of connecting first work section with second work section, the second necking portion of connecting second work section with third work section, the third necking portion of connecting third work section with fourth work section, the diameter of first necking portion, second necking portion and third necking portion reduces gradually, compressed air air inlet is located first work section, the exhaust port is located fourth work section, and the inner chamber of vacuum port and first work section communicates, the micro - pipeline formula vacuum generator of the utility model has the characteristics of high vacuum efficiency, and the small feature of air source consumption can cooperate with the vacuum chuck of the line board of grabbing and use.

Description

Technical Field

[0001] This utility model relates to the field of vacuum components technology, specifically to a miniature pipeline vacuum generator. Background Technology

[0002] A vacuum generator is a new type of efficient, clean, and economical vacuum component that uses a positive pressure air source to generate negative pressure. It makes it easy and convenient to obtain negative pressure in places where compressed air is available or in a pneumatic system where both positive and negative pressure are required simultaneously. Vacuum generators are widely used in many fields of industrial automation, including machinery, electronics, packaging, printing, plastics, and robotics.

[0003] In the process of gripping circuit boards, a vacuum generator is required to provide a vacuum for the vacuum chuck. Most existing miniature vacuum generators are single-stage direct-flow vacuum generators, which have the disadvantages of high gas consumption and low vacuum efficiency. They can only provide a small gripping force, which cannot meet the gripping requirements of circuit boards with rough surfaces.

[0004] Therefore, the purpose of this utility model is to provide a vacuum generator with low gas consumption and high vacuum efficiency, which can be applied to the gripping of circuit boards. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a miniature pipeline vacuum generator with high vacuum efficiency and low gas consumption, which can be used in conjunction with a vacuum chuck for gripping circuit boards.

[0006] The technical solution of this utility model is:

[0007] A miniature pipeline vacuum generator includes a tube body, a compressed air inlet at one end of the tube body, an exhaust port at the other end of the tube body, and a vacuum port on one side of the tube body. The tube body includes a first working section, a second working section, a third working section, and a fourth working section, as well as a first constriction section connecting the first working section and the second working section, a second constriction section connecting the second working section and the third working section, and a third constriction section connecting the third working section and the fourth working section. The diameters of the first constriction section, the second constriction section, and the third constriction section decrease sequentially. The compressed air inlet is located in the first working section, the exhaust port is located in the fourth working section, and the vacuum port communicates with the inner cavity of the first working section.

[0008] Furthermore, the diameter of the first constricted portion is 0.5-0.7 mm, the diameter of the second constricted portion is 0.3-0.5 mm, and the diameter of the third constricted portion is 0.2-0.3 mm.

[0009] Furthermore, the lengths of the first constricted portion, the second constricted portion, and the third constricted portion are 1.5-2 mm.

[0010] Furthermore, the tube body is made of FEP, PFA, nylon, or polyurethane material.

[0011] Furthermore, the exhaust port is equipped with a muffler.

[0012] Furthermore, the silencer includes a housing made of engineering material, a sound-absorbing material filled inside the housing, and an end cap connected to the housing. The sound-absorbing material is foam, and the end cap has multiple air holes.

[0013] Furthermore, the housing and the tube are connected by threads.

[0014] Compared with the prior art, the miniature pipeline vacuum generator provided by this utility model has the following advantages:

[0015] I. The miniature pipe-type vacuum generator provided by this utility model has four working sections in the tube body, which are connected by three constrictions, making the vacuum generator a three-stage vacuum structure. By limiting the diameter of each constriction, the vacuum efficiency is improved and the gas consumption is reduced. The miniature pipe-type vacuum generator provided by this utility model can be connected to a vacuum suction cup for gripping circuit boards, and the gripping effect is excellent.

[0016] II. The miniature pipeline vacuum generator provided by this utility model has a silencer installed at the exhaust port, which can reduce the noise to a quiet environment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the miniature pipeline vacuum generator of this utility model. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in the embodiments of this utility model, and to make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be further described below in conjunction with the accompanying drawings.

[0020] It should be noted that the descriptions of these embodiments are for the purpose of aiding understanding of the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] Please see Figure 1 This is a schematic diagram of the structure of the miniature pipeline vacuum generator of this utility model. The miniature pipeline vacuum generator of this utility model includes a tube body 1, a compressed air inlet 2 located at one end of the tube body, an exhaust port 3 located at the other end of the tube body, a vacuum port 4 located on one side of the tube body, and a silencer 5 located at the exhaust port. In application, the vacuum port 4 is connected to the vacuum suction cup through a pipeline.

[0022] In this invention, the tube body 1 includes a first working section 11, a second working section 12, a third working section 13, a fourth working section 14, a first constriction section 15 connecting the first and second working sections, a second constriction section 16 connecting the second and third working sections, and a third constriction section 17 connecting the third and fourth working sections. The diameters of the first constriction section 15, the second constriction section 16, and the third constriction section 17 decrease sequentially. The compressed air inlet 2 is located in the first working section 11, the exhaust port is located in the fourth working section 14, and the vacuum port is connected to the inner cavity of the first working section. By using a three-stage venturi tube series connection, the pressure of the compressed air is gradually reduced to form a vacuum, thereby obtaining the highest possible vacuum degree.

[0023] In this embodiment, the diameter of the first constriction 15 is 0.5-0.7 mm, the diameter of the second constriction 16 is 0.3-0.5 mm, and the diameter of the third constriction 17 is 0.2-0.3 mm; the lengths of the first constriction 15, the second constriction 16, and the third constriction 17 are 1.5-2 mm. By optimizing the diameter and length of each constriction, vacuum efficiency is improved and gas consumption is reduced. The vacuum generator of this invention has a compressed air consumption of 10-13 L / min, a pumping capacity of 11.5-12 L / min, and a vacuum degree of -91.8 to -93.2 kPa, achieving a large vacuum degree under relatively low gas consumption conditions.

[0024] In this embodiment, the tube body is made of engineering materials such as FEP, PFA, nylon, or polyurethane.

[0025] The silencer 5 includes a housing 51 made of engineering material, a sound-absorbing material 52 filled inside the housing, and an end cap 53 connected to the housing. The housing 51 is threadedly connected to the tube body. The sound-absorbing material 52 is foam with several through holes, and the end cap 53 has multiple air holes (not shown). Similarly, the end cap is also made of engineering material. The vacuum tube generator of this invention can reduce noise to 50 decibels, achieving a silent level.

[0026] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A miniature pipeline vacuum generator, characterized in that, The device includes a pipe body, a compressed air inlet at one end of the pipe body, an exhaust port at the other end of the pipe body, and a vacuum port on one side of the pipe body. The pipe body includes a first working section, a second working section, a third working section, and a fourth working section, as well as a first constricted section connecting the first working section and the second working section, a second constricted section connecting the second working section and the third working section, and a third constricted section connecting the third working section and the fourth working section. The diameters of the first constricted section, the second constricted section, and the third constricted section decrease sequentially. The compressed air inlet is located in the first working section, the exhaust port is located in the fourth working section, and the vacuum port communicates with the inner cavity of the first working section.

2. The miniature pipeline vacuum generator according to claim 1, characterized in that, The diameter of the first constricted portion is 0.5-0.7 mm, the diameter of the second constricted portion is 0.3-0.5 mm, and the diameter of the third constricted portion is 0.2-0.3 mm.

3. The miniature pipeline vacuum generator according to claim 1, characterized in that, The lengths of the first constricted portion, the second constricted portion, and the third constricted portion are 1.5-2mm.

4. The miniature pipeline vacuum generator according to claim 1, characterized in that, The tube body is made of FEP, PFA, nylon or polyurethane material.

5. The miniature pipeline vacuum generator according to claim 1, characterized in that, The exhaust port is equipped with a muffler.

6. The miniature pipeline vacuum generator according to claim 5, characterized in that, The silencer includes a housing made of engineering material, a sound-absorbing material filled inside the housing, and an end cap connected to the housing. The sound-absorbing material is foam, and the end cap has multiple air holes.

7. The miniature pipeline vacuum generator according to claim 6, characterized in that, The housing and the tube are connected by threads.

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