A protection structure of an evacuation nozzle

Abstract

The utility model belongs to the technical field of dust and sand prevention of pipe orifice, provide a protection structure of suction nozzle, include: first cover body, connect in the direct above of suction nozzle to cover the suction nozzle with full package type, and second cover body is connected in the direct above of first cover body to cover the first pressure relief hole that is set up on first cover body, wherein, first cover body inside passes first pressure relief hole, second pressure relief hole and outside atmosphere communication in proper order, second pressure relief hole hidden type is established in second cover body and its axis is towards ground to guide medium release while preventing dust and sand backflow into second cover body. The second cover body that is hidden type with second pressure relief hole covers first cover body, so that suction nozzle can realize normal pressure relief through first pressure relief hole, second pressure relief hole, exclude the security risk, utilize the second pressure relief hole of axis towards ground simultaneously can prevent dust and sand backflow into second cover body, improve the dust and sand prevention ability of suction nozzle.

Description

Technical Field

[0001] This utility model relates to the field of dust and sand prevention technology for pipe openings, specifically to a protective structure for a vacuum nozzle. Background Technology

[0002] Currently, after a vacuum container (such as a sleeve) is evacuated, such as Figure 1 As shown, the evacuation nozzle needs to be plugged with a sealed vacuum plug and covered with a sealing mask with a pressure relief hole to safely release pressure when the medium inside the vacuum container is overpressurized (after the sealed vacuum plug is broken, the pressure relief hole is used). However, this "evacuation nozzle + sealing mask" is exposed to the outdoor environment for a long time. Dust and sand in the air can flow back into the sealing mask through the pressure relief hole and cannot be discharged in time, resulting in a large accumulation and safety hazards such as inability to release pressure. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a protective structure for a vacuum nozzle, which solves the problem that in existing technologies, when a "vacuum nozzle + sealing mask" is in a long-term outdoor environment, dust and sand in the air can enter the sealing mask through the pressure relief hole and cannot be discharged in time, resulting in a large accumulation and safety hazards such as inability to depressurize.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A protective structure for a vacuum nozzle, comprising:

[0006] A first cover is connected directly above the vacuum nozzle to fully enclose it; and

[0007] The second cover is connected directly above the first cover to cover the first pressure relief hole opened on the first cover;

[0008] The first cover is connected to the outside atmosphere through the first pressure relief hole and the second pressure relief hole in sequence. The second pressure relief hole is hidden in the second cover and its axis faces the ground to guide the release of the medium while preventing dust and sand from flowing back into the second cover.

[0009] In one embodiment disclosed in this application, the second cover includes a first cylinder, a first sealing plate, a second cylinder, and a second sealing plate arranged sequentially from bottom to top;

[0010] The first cylinder has a smaller diameter and is connected to the first cover.

[0011] The first sealing plate has a ring-shaped structure to be sleeved on the outside of one end of the first cylinder and embedded inside the inside of one end of the second cylinder;

[0012] The second cylinder has a larger diameter, and its other end is sealed by the second sealing plate to form a pressure relief chamber;

[0013] The second pressure relief hole is opened in the first sealing plate, and the pressure relief chamber is connected to the outside atmosphere through the second pressure relief hole.

[0014] In one embodiment disclosed in this application, the second pressure relief hole is an arc-shaped notch that starts from the outer circle of the first sealing plate and extends inward toward its inner circle;

[0015] The arc-shaped notches are evenly distributed around the circumference of the circle.

[0016] In one embodiment disclosed in this application, the radius of the arc-shaped notch is less than or equal to half the width of the first sealing plate ring.

[0017] In one embodiment disclosed in this application, eight arc-shaped notches are evenly distributed around the circumference.

[0018] In one embodiment disclosed in this application, the first cylinder, the first sealing plate, the second cylinder, and the second sealing plate are welded together in sequence;

[0019] The first cylinder is threadedly connected to the outer thread of the first cover body through an internal thread machined on the inner side wall of the end away from the first sealing plate.

[0020] In one embodiment disclosed in this application, the first cover is generally cylindrical in shape, having an open end and a closed end arranged opposite to each other along the axial direction;

[0021] The open end is threaded to the external thread of the vacuum nozzle through the internal thread machined on its inner sidewall, and the closed end is provided with the first pressure relief hole.

[0022] In one embodiment disclosed in this application, the threaded connections are all pipe threaded connections.

[0023] In one embodiment disclosed in this application, both the first cover and the second cover are made of stainless steel.

[0024] In one embodiment disclosed in this application, the stainless steel grade is S31603 or S30408.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] 1. The first cover is covered by a second cover with a hidden second pressure relief hole, so that the vacuum nozzle can release pressure normally through the first pressure relief hole and the second pressure relief hole, eliminating safety hazards. At the same time, the second pressure relief hole with its axis facing the ground can prevent dust and sand from flowing back into the second cover, thus improving the dust and sand protection capability of the vacuum nozzle.

[0027] 2. The threaded pipe connection provides a better sealing effect, ensuring the airtightness of the first cover and / or the second cover (pressure relief chamber), while effectively blocking dust and sand from the air.

[0028] 3. Stainless steel has the characteristics of high strength, corrosion resistance and wear resistance, which can effectively extend the service life of this protective structure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the main cross-sectional structure of the existing "vacuum nozzle + sealing mask";

[0031] Figure 2 This is a schematic diagram of the main cross-section of the present invention;

[0032] Figure 3 This is a schematic diagram of the main cross-sectional structure of the second enclosure;

[0033] Figure 4 This is a schematic diagram of the main structure of the first sealing plate. Detailed Implementation

[0034] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0036] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly 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 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 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.

[0039] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0040] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0041] See Figures 2-4 As shown, this utility model provides a protective structure for a vacuum nozzle, comprising:

[0042] The first cover 100 is connected directly above the vacuum nozzle (not shown in the figure) to fully cover the vacuum nozzle; and

[0043] The second cover 200 is connected directly above the first cover 100 to cover the first pressure relief hole 110 opened on the first cover 100.

[0044] The first cover 100 is connected to the outside atmosphere through the first pressure relief hole 110 and the second pressure relief hole 221 in sequence. The second pressure relief hole 221 is hidden in the second cover 200 and its axis faces the ground to guide the release of the medium while preventing dust and sand from flowing back into the second cover 200.

[0045] Specifically, the second cover 200 includes a first cylinder 210, a first sealing plate 220, a second cylinder 230, and a second sealing plate 240 arranged sequentially from bottom to top. The first cylinder 210 has a smaller diameter and is connected to the first cover 100. The first sealing plate 220 has a ring-shaped structure to fit around the outside of one end of the first cylinder 210 and is embedded inside the inside of one end of the second cylinder 230. The second cylinder 230 has a larger diameter, and its other end is sealed by the second sealing plate 240 to form a pressure relief chamber. A second pressure relief hole 221 is opened on the first sealing plate 220, and the pressure relief chamber is connected to the outside atmosphere through the second pressure relief hole 221. The first sealing plate 220 is located below the second sealing plate 240 and is surrounded by the second cylinder 230, so that the second pressure relief hole 221 opened on the first sealing plate 220 faces the ground and is hidden, which will not damage the pressure relief function of the vacuum nozzle, and at the same time can effectively prevent dust and sand in the air from entering the pressure relief chamber through the second pressure relief hole 221. In other words, by covering the first cover 100 with the second cover 200, which is concealed and has the second pressure relief hole 221, the vacuum nozzle can achieve normal pressure relief through the first pressure relief hole 110 and the second pressure relief hole 221, thus eliminating safety hazards. At the same time, the second pressure relief hole 221, which faces the ground, can prevent dust and sand from flowing back into the second cover 200, thereby improving the dust and sand prevention capability of the vacuum nozzle.

[0046] See Figure 3 As shown, the second pressure relief hole 221 is an arc-shaped notch that starts from the outer circle of the first sealing plate 220 and extends towards its inner circle, with multiple arc-shaped notches evenly distributed around its circumference. In this way, when there is overpressure inside the vacuum container, the overpressure medium can be quickly released through the multiple arc-shaped notches, achieving safe pressure relief.

[0047] The radius of the arc-shaped notch is less than or equal to half the circumference of the first sealing plate 220 (i.e., the difference between its outer and inner radii). This ensures the strength of the first sealing plate 220 after multiple arc-shaped notches are made, thus improving the stability of the protective structure.

[0048] In this embodiment, eight arc-shaped notches are evenly distributed around the circumference. This provides sufficient pressure relief area and ensures high safety.

[0049] See Figure 2As shown, the first cylinder 210, the first sealing plate 220, the second cylinder 230, and the second sealing plate 240 are welded together in sequence. The first cylinder 210 is threadedly connected to the outer wall of the first cover 100 via an internal thread machined on its inner sidewall at the end away from the first sealing plate 220. This facilitates disassembly and assembly, and is beneficial for the later maintenance of the first cover 100.

[0050] See Figure 1 As shown, the first cover 100 has a cylindrical structure with an open end and a closed end arranged opposite each other along the axial direction. The open end is connected to the external thread of the vacuum nozzle through an internal thread machined on its inner sidewall, and the closed end has the aforementioned first pressure relief hole 110. This makes disassembly and assembly convenient and facilitates the later maintenance of the vacuum nozzle.

[0051] The aforementioned threaded connections (between the first cylinder 210 and the first cover 100, and between the first cover 100 and the evacuation nozzle) are all pipe thread connections. Pipe thread connections provide better sealing, ensuring the airtightness of the first cover 100 and / or the second cover 200 (pressure relief chamber), while effectively blocking dust and sand from the air.

[0052] In this embodiment, both the first cover 100 and the second cover 200 are made of stainless steel. Specifically, the preferred grade of stainless steel is S31603 or S30408. Stainless steel has the characteristics of high strength, corrosion resistance, and wear resistance, which can effectively extend the service life of this protective structure.

[0053] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A protective structure for a vacuum nozzle, characterized in that, include: The first cover is connected directly above the vacuum nozzle to fully cover the vacuum nozzle; and The second cover is connected directly above the first cover to cover the first pressure relief hole opened on the first cover; The first cover is connected to the outside atmosphere through the first pressure relief hole and the second pressure relief hole in sequence. The second pressure relief hole is hidden in the second cover and its axis faces the ground to guide the release of the medium while preventing dust and sand from flowing back into the second cover.

2. The protective structure for the evacuation nozzle according to claim 1, characterized in that: The second cover includes a first cylinder, a first sealing plate, a second cylinder, and a second sealing plate arranged sequentially from bottom to top; The first cylinder has a smaller diameter and is connected to the first cover. The first sealing plate has a ring-shaped structure to be sleeved on the outside of one end of the first cylinder and embedded inside the inside of one end of the second cylinder; The second cylinder has a larger diameter, and its other end is sealed by the second sealing plate to form a pressure relief chamber; The second pressure relief hole is opened in the first sealing plate, and the pressure relief chamber is connected to the outside atmosphere through the second pressure relief hole.

3. The protective structure for the evacuation nozzle according to claim 2, characterized in that: The second pressure relief hole is an arc-shaped notch that begins on the outer circle of the first sealing plate and extends toward its inner circle; The arc-shaped notches are evenly distributed around the circumference of the circle.

4. The protective structure for the evacuation nozzle according to claim 3, characterized in that, The radius of the arc-shaped notch is less than or equal to half the width of the first sealing plate ring.

5. The protective structure for the evacuation nozzle according to claim 3 or 4, characterized in that, The arc-shaped notch has eight evenly distributed around its circumference.

6. The protective structure for the evacuation nozzle according to claim 2, characterized in that: The first cylinder, the first sealing plate, the second cylinder, and the second sealing plate are welded together in sequence. The first cylinder is threadedly connected to the outer thread of the first cover body through an internal thread machined on the inner side wall of the end away from the first sealing plate.

7. The protective structure for the evacuation nozzle according to claim 1, characterized in that: The first cover has an overall cylindrical structure, with an open end and a closed end arranged opposite to each other along the axial direction; The open end is threaded to the external thread of the vacuum nozzle through the internal thread machined on its inner sidewall, and the closed end is provided with the first pressure relief hole.

8. The protective structure for the evacuation nozzle according to claim 6 or 7, characterized in that, All threaded connections are pipe thread connections.

9. The protective structure for the evacuation nozzle according to any one of claims 1 to 4, 6, and 7, characterized in that, Both the first and second covers are made of stainless steel.

10. The protective structure for the evacuation nozzle according to claim 9, characterized in that, The stainless steel grade is S31603 or S30408.

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