Vacuum generator

Abstract

The utility model discloses a vacuum generator which comprises a valve body, one side of the valve body is connected with an air inlet piece, and the other side of the valve body is connected with an exhaust piece. A connecting part is further arranged at the lower end of the valve body; a first air channel, a second air channel and a third air channel are arranged in the air inlet piece. A fourth air channel is formed in the exhaust part; the first air channel, the second air channel and the third air channel form a Laval pipe structure, the inner diameter of the fourth air channel is larger than the outer diameter of the third air channel, and the connecting part is connected and communicated with the third air channel and the fourth air channel through an arranged fifth air channel. When compressed air passes through the Laval pipe structure, air flow is released to the fourth air channel, and at the moment, the air flow flowing at a high speed promotes the fifth air channel to form negative pressure, so that the equipment completes formation of the negative pressure through flowing of the air flow. On the basis, the equipment has the advantages of being simple in structure, small in size and convenient to use while achieving the vacuum capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum equipment, in particular to a vacuum generator. Background Art

[0002] In the prior art, such as the prior art with the announcement number CN101375064B, the general scheme is as follows: a device for controlling the opening and closing of a compressed gas consumption circuit, the control device includes a normally closed two-position shut-off valve, the shut-off valve has a guide chamber and a reverse guide chamber permanently connected to a compressed gas source, the guide chamber is directly connected to the compressed gas source, the reverse guide chamber is connected to the compressed gas source through a contraction structure, and the reverse guide chamber includes a deflation branch connection structure opened or closed by a two-position, two-port valve. It can be seen that although it also uses air flow to complete the formation of vacuum, it can be clearly seen from its technical scheme and drawings that its structure needs to be optimized. Utility Model Content

[0003] The purpose of the utility model is to provide a vacuum generator to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum generator, comprising a valve body, one side of the valve body is connected to an air intake member, the other side of the valve body is connected to an exhaust member, and a connecting portion is further provided at the lower end of the valve body; a first air duct, a second air duct and a third air duct are provided inside the air intake member, and the first air duct, the second air duct and the third air duct constitute a Laval tube structure; a fourth air duct is provided inside the exhaust member, and the inner diameter of the fourth air duct is greater than the outer diameter of the third air duct; the connecting portion is connected to the third air duct and the fourth air duct through a fifth air duct.

[0005] As a preferred technical solution of the utility model: a quick connector is provided at one end of the air inlet member away from the valve body.

[0006] As a preferred technical solution of the utility model: a silencer sheet is also provided inside the exhaust member.

[0007] As a preferred technical solution of the utility model: a pressure cover is further provided at one end of the air inlet member away from the valve body, and the silencer plate is fixed in the air inlet member by the pressure cover.

[0008] As a preferred technical solution of the utility model: the fifth air channel completely penetrates the valve body, and one end of the fifth air channel is sealed by providing a plug.

[0009] As a preferred technical solution of the utility model: the cross section of the valve body is polygonal, and the air inlet member and the air exhaust member are both threadedly connected to the valve body.

[0010] By adopting the above technical solution, the beneficial effect of the utility model is that when the compressed gas passes through the Laval tube structure and releases the airflow to the fourth airway, the high-speed airflow at this time causes the fifth airway to form a negative pressure, so that the device completes the formation of negative pressure through the airflow. Based on this, the device has the advantages of simple structure, small size and easy use while achieving vacuum capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an exploded schematic diagram of the main structure of the utility model;

[0012] Figure 2 It is a cross-sectional schematic diagram of the main structure of the utility model;

[0013] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0014] Figure 4 This is a schematic diagram of the exploded structure of the air intake component of the utility model;

[0015] Figure 5 It is a schematic diagram of the exploded structure of the exhaust component of the utility model.

[0016] In the figure: 1. valve body; 2. plug; 3. air inlet; 4. exhaust; 5. connection part; 6. first air channel; 7. second air channel; 8. third air channel; 9. fourth air channel; 10. fifth air channel; 11. quick connector; 12. silencer; 13. gland. DETAILED DESCRIPTION

[0017] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present utility model, and should not be construed as limitations on the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0018] See also Figure 1-5The utility model provides an embodiment: a vacuum generator, including a valve body 1, one side of the valve body 1 is connected to an air intake member 3, the other side of the valve body 1 is connected to an exhaust member 4, and a connecting portion 5 is further provided at the lower end of the valve body 1; a first air channel 6, a second air channel 7 and a third air channel 8 are provided inside the air intake member 3, and the first air channel 6, the second air channel 7 and the third air channel 8 form a Laval tube structure; a fourth air channel 9 is provided inside the exhaust member 4, and the inner diameter of the fourth air channel 9 is greater than the outer diameter of the third air channel 8; the connecting portion 5 is connected to the third air channel 8 and the fourth air channel 9 through a fifth air channel 10.

[0019] In summary, when the compressed gas passes through the Laval tube structure and releases the airflow to the fourth air channel 9, the high-speed airflow at this time prompts the fifth air channel 10 to generate a suction negative pressure flow, so that the device completes the formation of negative pressure through the airflow. Based on this, the device has the advantages of simple structure, small size and easy use while achieving vacuum capacity.

[0020] Furthermore, since a quick connector 11 is provided at one end of the air inlet member 3 away from the valve body 1 , it is convenient for the air pipe to be quickly connected to the air inlet member 3 and to be quickly disassembled.

[0021] On the basis of the above solution, since a silencer sheet 12 is further provided inside the exhaust member 4, the silencer sheet 12 is utilized to reduce the noise when the airflow is discharged.

[0022] At the same time, since a pressure cover 13 is provided at one end of the air inlet member 3 away from the valve body 1, and the muffler plate 12 is fixed in the air inlet member 3 by the pressure cover 13, the installation and replacement of the muffler plate 12 are simple and convenient.

[0023] Furthermore, since the fifth air channel 10 completely penetrates the valve body 1 and one end of the fifth air channel 10 is sealed by providing a plug 2, the processing of the fifth air channel 10 is simple and convenient, thereby reducing the processing cost of the fifth air channel 10.

[0024] Furthermore, since the cross-section of the valve body 1 is polygonal, the installation and disassembly of the valve body 1 are convenient. At the same time, the air inlet part 3 and the exhaust part 4 are both threadedly connected to the valve body 1, so that the air inlet part 3 and the exhaust part 4 also have the advantage of convenient assembly and disassembly.

[0025] To summarize, by processing the fifth air channel 10 inside the valve body 1, then processing the Laval tube structure inside the air inlet part 3, and processing the fourth air channel 9 inside the exhaust part 4, each air channel can be produced and processed separately, and then the air inlet part 3 and the exhaust part 4 are assembled to the valve body 1 by threaded fitting, which not only reduces the processing difficulty of the equipment, but also facilitates the assembly of the equipment and the replacement of some spare parts after damage, thereby having the advantages of simple structure, convenient processing and low use cost compared with the prior art.

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

Claims

1. A vacuum generator, characterized in that: It comprises a valve body (1), one side of the valve body (1) is connected to an air inlet member (3), the other side of the valve body (1) is connected to an air outlet member (4), and a connecting portion (5) is further provided at the lower end of the valve body (1); The air inlet (3) is provided with a first air duct (6), a second air duct (7) and a third air duct (8) inside, and the first air duct (6), the second air duct (7) and the third air duct (8) form a Laval tube structure; A fourth air passage (9) is provided inside the exhaust member (4), and the inner diameter of the fourth air passage (9) is greater than the outer diameter of the third air passage (8); The connecting portion (5) is connected to and communicates with the third air channel (8) and the fourth air channel (9) via a fifth air channel (10).

2. A vacuum generator according to claim 1, characterized in that: A quick connector (11) is provided at one end of the air inlet member (3) away from the valve body (1).

3. A vacuum generator according to claim 1 or 2, characterized in that: A sound-absorbing sheet (12) is also provided inside the exhaust member (4).

4. A vacuum generator according to claim 3, characterized in that: A pressure cover (13) is also provided at one end of the air inlet member (3) away from the valve body (1), and the silencer plate (12) is fixed inside the air inlet member (3) via the pressure cover (13).

5. A vacuum generator according to claim 4, characterized in that: The fifth air passage (10) completely penetrates the valve body (1), and one end of the fifth air passage (10) is sealed by providing a plug (2).

6. A vacuum generator according to claim 1, characterized in that: The cross section of the valve body (1) is polygonal, and the air inlet component (3) and the air outlet component (4) are both threadedly connected to the valve body (1).

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