Water-jet vacuum pump

Abstract

The utility model relates to a vacuum pump technical field especially, it is a kind of water injection vacuum pump, including cylinder, cone cylinder, straight pipe and top cover, the diameter of top cover is same with the big end diameter of cone cylinder, is provided with water inlet pipe at top cover center, is provided with nozzle at the end of water inlet pipe, is provided with air inlet pipe on the lateral wall of cylinder, is provided with spray water pipe outside the lateral wall of top cover, is provided with spray ring pipe inside top cover, the spray water pipe is communicated with spray ring pipe, and there are several spray heads in interval array in the lower end surface of spray ring pipe. The water injection vacuum pump obtained by the utility model can produce rotating airflow after condensable gas enters cylinder from air inlet pipe, and condenses under the action of re-spraying water, the nozzle of water inlet pipe sprays power water, venturi effect is generated in cone cylinder, vacuumizing to gas is realized, and the vacuum degree can reach 3.3KPa, and under the requirement of same vacuum degree, compared with the power water consumption of prior art water injection vacuum pump, it can be reduced by 30%.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, and in particular to a water jet vacuum pump. Background Technology

[0002] In existing technologies, water jet vacuum pumps utilize high-pressure water ejected from a nozzle, which, through a cone, creates a Venturi effect, drawing in and expelling external condensable gases to achieve a vacuum. However, current vacuum pumps achieve relatively low vacuum levels in practical applications and require high-level installation, limiting their use and resulting in poor versatility. Utility Model Content

[0003] To address the aforementioned technical deficiencies, this invention provides a water jet vacuum pump that employs pre-condensation of condensable gases via spraying, thereby significantly reducing the amount of gas being pumped, thus increasing the vacuum level and reducing the amount of power water required.

[0004] This utility model discloses a water jet vacuum pump, including a cylinder, a cone, a straight pipe, and a top cover. The top cover, cylinder, cone, and straight pipe are connected sequentially from top to bottom to form a shell. The diameter of the top cover is the same as the diameter of the large end of the cone, the diameter of the straight pipe is the same as the diameter of the small end of the cone, and the diameter of the cylinder is larger than the diameter of the top cover. The cylinder is eccentrically positioned relative to the top cover, and the central axes of the top cover, cone, and straight pipe coincide. A water inlet pipe is provided at the center of the top cover, extending vertically downward to the connection between the cone and the cylinder. A nozzle is provided at the end of the water inlet pipe. An air inlet pipe is provided on the side wall of the cylinder. A spray water pipe is provided outside the side wall of the top cover, extending into the interior of the top cover. A spray ring pipe is provided inside the top cover, and the spray water pipe is connected to the spray ring pipe. Several spray heads are arranged in an array at intervals on the lower end face of the spray ring pipe.

[0005] One side of the cylinder protrudes from the top cover, and the air inlet pipe is located on the side wall of the cylinder protruding from the top cover. The air inlet pipe is located on the side of the cylinder protruding from the top cover, and the air inlet direction is the tangential direction of the cylinder.

[0006] Several L-shaped support frames are spaced apart on the inner wall of the top cover, and the spray ring pipe is fixed to the support frames by clamps.

[0007] Connecting flanges are installed at the ends of the air inlet pipe, the straight pipe, and the spray water pipe.

[0008] Mounting supports are provided on the outer walls of opposite sides of the cylinder.

[0009] The water jet vacuum pump of this invention has a spray ring pipe and a spray head installed inside the top cover. After the condensable gas enters the cylinder through the air inlet pipe, it generates a rotating airflow and condenses under the action of spray water. The nozzle of the water inlet pipe sprays motive water, which generates a Venturi effect in the cone to achieve vacuuming of the condensable gas. The vacuum degree can reach 3.3 kPa. Moreover, under the same vacuum degree requirement, the amount of motive water used can be reduced by 30% compared with the existing water jet vacuum pump. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0011] Figure 2 This is a top view of the structure of this utility model. Detailed Implementation

[0012] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0013] Example 1:

[0014] like Figure 1 , Figure 2 As shown, this utility model discloses a water jet vacuum pump, including a cylinder 1, a conical cylinder 3, a straight pipe 4, and a top cover 2. The top cover 2, cylinder 1, conical cylinder 3, and straight pipe 4 are connected sequentially from top to bottom to form a shell. The diameter of the top cover 2 is the same as the diameter of the large end of the conical cylinder 3, and the diameter of the straight pipe 4 is the same as the diameter of the small end of the conical cylinder 3. The diameter of the cylinder 1 is larger than the diameter of the top cover 2. The cylinder 1 is eccentrically positioned relative to the top cover 2. The central axis of the top cover 2, conical cylinder 3, and straight pipe 4 is... The lines coincide; a water inlet pipe 5 is provided at the center of the top cover 2, the water inlet pipe 5 extends vertically downward to the connection between the cone 3 and the cylinder 1, a nozzle 6 is provided at the end of the water inlet pipe 5, an air inlet pipe 11 is provided on the side wall of the cylinder 1, a spray water pipe 7 is provided outside the side wall of the top cover 2, the spray water pipe 7 extends into the inside of the top cover 2, a spray ring pipe 8 is provided inside the top cover 2, the spray water pipe 7 is connected to the spray ring pipe 8, and a number of spray heads 9 are arranged in a spaced array on the lower end face of the spray ring pipe 8.

[0015] A shell is formed by sequentially connecting a top cover 2, a cylindrical body 1, a conical tube 3, and a straight pipe 4, creating a closed cavity inside the shell. The diameter of the cylindrical body 1 is larger than the diameters of the top cover 2 and the conical tube 3, resulting in a relatively large air intake within the cylindrical body 1. After the condensable gas to be extracted enters the cylindrical body 1 through the air inlet pipe 11, high-pressure dynamic water is simultaneously sprayed into the conical tube 3 through the water inlet pipe 5 and the nozzle 6, generating a Venturi effect. The high-pressure dynamic water carries the condensable gas to be extracted and outputs it outward through the straight pipe 4. At this time, the air pressure inside the cylindrical body 1 decreases, drawing external gas inward and thus achieving a vacuum. Simultaneously, low-temperature spray water is delivered from the spray water pipe 7 outside the top cover 2 to the internal spray ring pipe 8 and atomized and sprayed out from the spray head 9. The water mist enters the cylindrical body 1 and condenses the condensable gas to be extracted. The condensed condensable gas is greatly reduced, further decreasing the air pressure inside the cylindrical body 1, and drawing external condensable gas into the cylindrical body 1. Pre-condensation of the condensable gas being pumped within the cylinder 1 effectively reduces the amount of power water required for the nozzle 6. Under the same vacuum requirements, this method reduces the amount of power water used by 30% compared to existing water jet vacuum pumps. Furthermore, this design can achieve a maximum vacuum of 3.3 kPa during normal operation.

[0016] The nozzles 6 and spray heads 9 are all commercially available products, and those skilled in the art should know their specific structures, so they will not be described in detail here.

[0017] One side of the cylinder 1 protrudes from the top cover 2. The air inlet pipe 11 is located on the side wall of the cylinder 1 protruding from the top cover 2, and the air inlet pipe 11 is located on the side of the cylinder 1 protruding from the top cover 2, with the air inlet direction being tangential to the cylinder 1. Since the diameter of the cylinder 1 is larger than the diameter of the large end of the cone 3, but to allow the condensable gas being pumped into the cylinder 1 to enter the cone 3 more smoothly, the cylinder 1 and the cone 3 are eccentrically positioned, with one side of the cylinder 1 flush with the cone 3, and the opposite side protruding from the cone 3, while the top cover 2 and the cone 3 are concentric. Therefore, the cylinder 1 protrudes from the top cover 2. Furthermore, the air inlet pipe 11 is located on the protruding side wall of the cylinder 1, allowing the condensable gas to be pumped towards the side of the cylinder 1 flush with the cone 3. This allows it to smoothly enter the cone 3 under the Venturi effect without obstruction, greatly improving the smoothness of airflow and increasing the vacuum level. In addition, the air inlet pipe 11 is located on the side of the protruding part of the cylinder 1, that is, the air intake direction is tangential to the cylinder 1. After the condensable gas is drawn into the cylinder 1, it will rotate and enter the cone 3 more smoothly under the action of negative pressure and be discharged outward. If it is directly fed into the cylinder 1 along the diameter direction, it will first impact the water inlet pipe 5, affecting the air intake volume, and secondly, it will impact and rebound against the side wall, affecting the efficiency of gas entering the cone 3, thus affecting the vacuum degree.

[0018] Several L-shaped support frames 10 are spaced apart on the inner wall of the top cover 2, and the spray ring pipe 8 is fixed to the support frame 10 by clamps. The support frame 10 on the inner wall of the top cover 2 can fix the spray ring pipe 8 to ensure the stability of the spray ring pipe 8, and make the spray head 9 spray cooling water more stably and reliably.

[0019] A connecting flange 12 is provided at the end of the air inlet pipe 11, the end of the straight pipe 4, and the end of the spray water pipe 7. The flange 12 facilitates the connection of the air to external pipes and increases installation efficiency.

[0020] Mounting supports 13 are provided on the outer side walls of opposite sides of the cylinder 1. The mounting supports 13 facilitate the installation of the entire vacuum pump, and the installation position can be selected according to actual needs, making installation and maintenance convenient.

[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A water-jet vacuum pump, characterized by: The device includes a cylindrical body, a conical cylinder, a straight pipe, and a top cover. The top cover, cylindrical body, conical cylinder, and straight pipe are connected sequentially from top to bottom to form a shell. The diameter of the top cover is the same as the diameter of the large end of the conical cylinder, the diameter of the straight pipe is the same as the diameter of the small end of the conical cylinder, the diameter of the cylindrical body is larger than the diameter of the top cover, the cylindrical body is eccentrically positioned relative to the top cover, and the central axes of the top cover, conical cylinder, and straight pipe coincide. A water inlet pipe is provided at the center of the top cover. The water inlet pipe extends vertically downward to the connection between the cone and the cylinder. A nozzle is provided at the end of the water inlet pipe. An air inlet pipe is provided on the side wall of the cylinder. A spray water pipe is provided on the outside of the side wall of the top cover and extends into the inside of the top cover. A spray ring pipe is provided inside the top cover. The spray water pipe is connected to the spray ring pipe. Several spray heads are arranged in an array at intervals on the lower end face of the spray ring pipe.

2. A water-jet vacuum pump according to claim 1, characterized in that: One side of the cylinder protrudes from the top cover, and the air inlet pipe is located on the side wall of the cylinder protruding from the top cover. The air inlet pipe is located on the side of the cylinder protruding from the top cover, and the air inlet direction is the tangential direction of the cylinder.

3. A water-jet vacuum pump according to claim 1 or 2, characterized in that: Several L-shaped support frames are spaced apart on the inner wall of the top cover, and the spray ring pipe is fixed to the support frames by clamps.

4. A water-jet vacuum pump according to claim 1, characterized in that: Connecting flanges are installed at the ends of the air inlet pipe, the straight pipe, and the spray water pipe.

5. A water-jet vacuum pump according to claim 1, characterized in that: Mounting supports are provided on the outer walls of opposite sides of the cylinder.

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