Sealing structure of inflation equipment and inflation equipment

Abstract

The sealing structure comprises an equipment body, a gas cylinder, a sealing sleeve piece and a gas cylinder sleeve, a puncture piece is arranged in the equipment body, at least two sets of sealing rings are arranged on the sealing sleeve piece, the sealing sleeve piece is arranged at the opening of the gas cylinder in a sleeved mode, the gas cylinder is arranged in the gas cylinder sleeve, and when the gas cylinder sleeve is matched with the equipment body, the sealing rings are arranged on the sealing sleeve piece. The puncturing piece punctures the opening of the gas cylinder, and the at least two groups of sealing rings are sealed with the neck of the gas cylinder and / or the inner wall of the equipment body. The radial sealing adopted by the utility model is smaller in applied force when the bottle sleeve is screwed, so that the bottle sleeve can be screwed to a preset position more easily, and different appearance shapes can be matched conveniently; a larger sealing area is axially formed at the bottleneck by adopting a radial sealing mode, so that a gas cylinder with a wider length size is allowed to be used; the radial sealing structure is not affected by the factors and is not prone to leakage in the using period of the gas cylinder.

Description

Technical Field

[0001] This utility model belongs to the technical field of inflatable equipment, and specifically relates to a sealing device and an inflatable equipment. Background Technology

[0002] In the field of gas injection equipment that uses disposable high-pressure small gas cylinders as the gas source, the traditional sealing method after the ejector pin punctures the cylinder involves using a sealing element (such as a sealing plate or sealing ring) at the connection between the ejector pin and the top of the cylinder for axial end-face compression sealing. When using a threaded cylinder sleeve to tighten and press against the punctured cylinder, due to limitations in the sealing element material and cylinder sleeve size, to ensure that the sealing element is in working condition at the same time the cylinder sleeve is screwed to the set position, corresponding redundant design is often required in the structure. This not only increases the product's external dimensions but also increases manufacturing difficulty. Moreover, the axial end-face seal requires a large force when the cylinder sleeve is screwed on, and during use, the sealing pressure of the end-face seal often weakens due to factors such as a drop in internal gas pressure or the cylinder sleeve not being screwed on properly, leading to seal failure and leakage. Utility Model Content

[0003] In order to solve the above-mentioned problems in the prior art, this application provides a sealing device and an inflation device for an inflation device to solve the above-mentioned technical defects.

[0004] According to a first aspect of this utility model, a sealing structure for an inflation device is proposed, comprising a device body, a gas cylinder, a sealing kit, and a gas cylinder sleeve. A piercing element is provided within the device body, and at least two sets of sealing rings are provided on the sealing kit. The sealing kit is fitted over the opening of the gas cylinder, which is placed inside the gas cylinder sleeve. When the gas cylinder sleeve mates with the device body, the piercing element pierces the opening of the gas cylinder, and at least two sets of sealing rings seal against the neck of the gas cylinder and / or the inner wall of the device body. This radial sealing method can axially form a larger sealing area at the bottleneck, allowing for the use of gas cylinders with wider length dimensions, and reducing the likelihood of leakage during the gas cylinder's service life.

[0005] In some specific embodiments, the sealing kit has an annular structure, and an annular groove is provided at the opening of the inner wall of the sealing kit, with two sets of sealing rings placed side by side in the annular groove.

[0006] In some specific embodiments, a movable partition is provided between the two sets of sealing rings, and the inner diameter of the movable partition is larger than the diameter of the gas cylinder opening. The movable partition can move and adjust accordingly according to the force applied to the sealing rings, optimizing the sealing effect of the two sets of sealing rings and making the seal tighter and more uniform.

[0007] In some specific embodiments, the movable partition is made of rigid plastic. Rigid plastics can include nylon, PP, PA, etc. This design allows it to withstand friction and compression during the gas cylinder introduction and sealing process over long-term use, resisting deformation and damage. This ensures the structural integrity and functional stability of the movable partition, maintaining the sealing synergy between the two sets of sealing rings, extending the service life of the sealing structure, reducing the risk of seal failure due to damage to the movable partition, and improving the reliability and durability of the inflation equipment's sealing structure.

[0008] In some specific embodiments, when the gas cylinder is introduced into the sealing kit, the lower sealing ring is deformed by the bottleneck of the gas cylinder, pushing the movable partition to press the upper sealing ring against the inner wall of the equipment body and the inner wall of the sealing kit. This method achieves automatic tight fitting of the two sets of sealing rings, ensuring that the sealing structure can quickly enter the optimal sealing state during the gas cylinder installation process, without the need for additional complex operations and adjustments. This improves the ease of use of the filling equipment and the timeliness of sealing, effectively preventing gas leakage during the gas cylinder installation process.

[0009] In some specific embodiments, the sealing kit has an annular structure, with annular grooves on both the inner and outer walls. Two sets of sealing rings are respectively disposed in the annular grooves on the inner and outer walls. This structure forms a sealing zone between the top of the gas cylinder and the dual device bodies, preventing gas leakage after the gas cylinder is punctured.

[0010] In some specific embodiments, an annular protrusion is provided at the inlet below the sealing ring on the inner wall of the sealing kit. When the gas cylinder is introduced, this protrusion undergoes interference deformation, indenting and pressing against the neck of the gas cylinder, thereby enhancing the sealing effect of the sealing ring at this location.

[0011] In some specific embodiments, the puncture device includes a pin extending from the inner wall of the device body, the head of which has a complete conical structure. This design allows for a rapid seal of the puncture site after puncture, preventing a sudden increase in pressure in the sealing area due to gas leakage during continued advancement of the gas cylinder after puncture, which could press against the cylinder and make it difficult to tighten the cylinder sleeve.

[0012] According to a first aspect of the present invention, an inflation device is provided, comprising a sealing structure as described above, and a pressure reducing valve is provided inside the device body.

[0013] In some specific embodiments, a raised structure is provided on the outer side of the device body, and a through hole is formed on the raised structure. This feature serves as both a hanging hole and a grip for tightening the gas cylinder sleeve, increasing the practicality and convenience of the inflation device.

[0014] Compared with the prior art, the beneficial results of this utility model are as follows:

[0015] Compared to axial end-face compression sealing, the radial seal used in this application requires less force when the bottle sleeve is tightened, making it easier to screw the sleeve to the predetermined position and facilitating different appearance designs. The radial seal creates a larger axial sealing area at the bottle neck, allowing for a wider range of gas cylinder lengths. Furthermore, unlike axial end-face seals, which are prone to leakage due to decreased internal pressure or improper tightening, the radial seal structure is unaffected by these factors throughout the cylinder's lifespan. The bottle neck seal is an independent component, easily replaceable during use, ensuring a good seal. Attached Figure Description

[0016] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many anticipated advantages of the embodiments will be readily recognized as they become better understood through reference to the following detailed description. Elements in the drawings are not necessarily to scale. The same reference numerals refer to corresponding similar parts.

[0017] Figure 1 This is a cross-sectional structural schematic diagram of the inflation device according to the first embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the sealing structure of an inflation device according to the first specific embodiment of the present utility model;

[0019] Figure 3 This is a cross-sectional structural schematic diagram of an inflatable device according to a second embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the sealing structure of an inflation device according to a second specific embodiment of the present invention.

[0021] The meanings of the numbers in the diagram are as follows: 1-Equipment body, 11-Protruding structure, 12-Hanging hole, 2-Gas cylinder sleeve, 3-Gas cylinder, 4-Sealing kit, 41-First sealing ring, 42-Second sealing ring, 43-Modible partition, 5-Pressure reducing valve, 6-Piercing part, 7-Top cover. Detailed Implementation

[0022] In the following detailed description, reference is made to the accompanying drawings, which form part of the detailed description and illustrate illustrative specific embodiments in which the present invention may be practiced. In this regard, directional terms such as “top,” “bottom,” “left,” “right,” “up,” “down,” etc., are used with reference to the orientation of the described figures. Because components of the embodiments can be positioned in several different orientations, directional terms are used for illustrative purposes and are by no means limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present invention. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0023] This utility model proposes an inflation device. Figure 1 A schematic diagram of the structure of the inflation device according to the first embodiment of this utility model is shown, as follows: Figure 1 As shown, the inflation device includes a device body 1, a gas cylinder sleeve 2, a gas cylinder 3, and a sealing kit 4. The device body 1 is the main structure of the inflation device, and it contains a pressure reducing valve 5 and a piercing element 6. The piercing element 6 is located at the air inlet end of the pressure reducing valve 5. The sealing kit 4 is fitted onto the opening of the gas cylinder 3. The gas cylinder 3 is placed inside the gas cylinder sleeve 2. When the gas cylinder sleeve 2 and the device body 1 are engaged, the piercing element 6 pierces the opening of the gas cylinder 6. At least two sets of sealing rings on the sealing kit 4 achieve radial sealing with the neck of the gas cylinder 6 and the inner wall of the device body. The following describes the process in conjunction with... Figure 2 The schematic diagram of the sealing structure of the inflation device according to the first specific embodiment of the present invention is shown below, and its sealing structure is described in detail:

[0024] In a specific embodiment, the sealing kit 4 has an annular structure with an annular groove at the opening of its inner wall. Two sets of sealing rings, namely the first sealing ring 41 and the second sealing ring 42, are placed side by side in the annular groove 44. A movable partition 43 is provided between the two sets of sealing rings. The inner diameter of the movable partition 43 is larger than the diameter of the gas cylinder 3's opening. The movable partition 43 is made of rigid nylon plastic (PP, PA, or other rigid plastics can also be used). When the gas cylinder 3 is inserted into the sealing kit 4, the lower first sealing ring 41 is deformed by the neck of the gas cylinder 3, pushing the movable partition 43 to press the upper second sealing ring 42 against the inner wall of the equipment body 1 and the inner wall of the sealing kit 4. This achieves automatic tight fitting of the two sets of sealing rings, ensuring that the sealing structure can quickly enter the optimal sealing state during the installation of the gas cylinder 3 without additional complex operations and adjustments. This improves the ease of use of the filling equipment and the timeliness of sealing, effectively preventing gas leakage during the installation of the gas cylinder 3. Meanwhile, the rigid plastic movable partition 43 can withstand the friction and compression during the gas cylinder 3 introduction and sealing process in the long-term use process, and is not easily deformed or damaged. This ensures the structural integrity and functional stability of the movable partition 43, thereby maintaining the sealing synergy between the two sets of sealing rings, extending the service life of the sealing structure, reducing the risk of sealing failure caused by damage to the movable partition 43, and improving the reliability and durability of the gas filling equipment sealing structure.

[0025] In some other embodiments, the first sealing ring 41 and the second sealing ring 42 can be placed close together without the movable partition 43, which can also achieve a certain sealing effect. The specific method depends on the diameter of the sealing ring and the depth of the groove.

[0026] In a specific embodiment, the piercing element 6 includes a pin extending from the inner wall of the device body 1, the head of which has a complete conical structure. When the gas cylinder sleeve 2 is engaged with the device body 1, the pin can pierce the mouth of the gas cylinder 3. Due to the conical structure of the pin head, a seal can be achieved at the puncture site in a short time after piercing, avoiding the sudden increase in pressure in the sealing area caused by gas leakage during the continued advancement after the gas cylinder 3 is pierced, which would press against the gas cylinder 3 and make it difficult to turn the sleeve 2.

[0027] In a specific embodiment, high-pressure gas is stored in cylinder 3 and placed inside cylinder sleeve 2 to provide a gas source. Pressure reducing valve 5 is used to regulate the gas pressure, ensuring the safety and accuracy of the filling process. The structure of pressure reducing valve 5 can be selected according to different needs; its specific structure and principle will not be elaborated here.

[0028] In a specific embodiment, a protruding structure 11 is provided on the outer side of the device body 1. The protruding structure 11 has a hanging hole 12, which serves as both a hanging hole and a grip for tightening the gas cylinder sleeve 2. This increases the practicality and convenience of the inflation device. Users can easily hang the inflation device for storage and carrying. At the same time, it provides a more stable force point when tightening the gas cylinder sleeve 2, making the installation of the gas cylinder sleeve 2 more secure and convenient, and improving the user's operating experience.

[0029] In a specific embodiment, the upper part of the device body 1 is also provided with an upper cover 7. One end of the upper cover 7 is fitted onto the top of the device body 1, and the other end is provided with a cap. The cap can provide protection for the inflation nozzle on the device body 1. The side wall of the cap is provided with an air vent. When the cap is on the inflation nozzle, pressing the top of the cap can open the air vent valve of the device, which is convenient for users to check the working condition of the inflation device on a daily basis.

[0030] Figure 3 This is a cross-sectional structural diagram of the inflation device according to the second embodiment of the present invention, as shown below. Figure 3 As shown, this embodiment is similar in structure to Embodiment 1, except for the structure of the sealing kit 4. In this embodiment, Figure 4 A schematic diagram of the sealing structure of an inflation device according to a second specific embodiment of the present invention is shown, as follows: Figure 4 As shown, the sealing kit 4 also has a ring-shaped structure, with annular grooves on its inner and outer walls. Two sets of sealing rings (first sealing ring 41 and second sealing ring 42) are respectively disposed in the annular grooves on the inner and outer walls. This structure forms a sealing area between the top of the gas cylinder 3 and the equipment body 1, preventing gas leakage after the gas cylinder 3 is punctured. Furthermore, an annular protrusion is provided at the inlet below the sealing ring (such as the first sealing ring 41) on the inner wall of the sealing kit 4. When the gas cylinder 3 is introduced, the annular protrusion undergoes interference deformation, indenting and pressing tightly against the neck of the gas cylinder 3, thereby enhancing the sealing effect of the sealing ring (first sealing ring 41) at this location.

[0031] The radial sealing method used in this application forms a large sealing area axially at the bottleneck. This characteristic allows the seal to no longer be limited to the small contact area of ​​traditional axial end-face seals, but rather to form a relatively wide sealing band around the bottleneck. For example, in the cooperation between the gas cylinder and the sealing kit and the equipment body, multiple sets of sealing rings (such as the first and second sealing rings in the embodiment) can fully contact the bottleneck and the inner wall of the equipment body in the radial direction, effectively covering a larger potential leakage path and greatly reducing the possibility of gas leakage from around the cylinder opening. Compared with traditional axial end-face seals, radial sealing is more adaptable to the length dimensions of gas cylinders, allowing for the use of gas cylinders with a wider range of lengths. Whether the gas cylinder is long or short, the radial sealing structure can be well adapted to it, ensuring reliable sealing under different gas cylinder specifications and improving the compatibility of the filling equipment with various gas cylinder models.

[0032] Furthermore, the radial sealing structure is less prone to leakage during the cylinder's service life. Traditional axial end-face seals often fail due to reduced sealing pressure caused by decreased internal cylinder pressure or improper cylinder sleeve tightening, leading to seal failure and leakage. The radial sealing structure, however, is less affected by these factors. Its sealing principle relies on a tight radial fit between the sealing ring and the cylinder neck and the inner wall of the equipment. Even with changes in internal cylinder pressure or slight deviations in cylinder sleeve installation, it maintains excellent sealing performance, ensuring the safety and stability of the filling equipment throughout its use. For example, using a movable partition (such as a rigid nylon plastic partition) between the two sets of sealing rings in the sealing kit, when the cylinder is introduced, the lower sealing ring is deformed and pushes the movable partition to press the upper sealing ring against the relevant inner wall, achieving a coordinated seal between the two sets of sealing rings. This design further enhances the reliability of the seal, effectively preventing gas leakage from gaps between the sealing rings, maintaining a good sealing condition both during initial cylinder installation and long-term use.

[0033] The sealing kit of this application is an independent component that is easy to replace during use. For example, if components such as the sealing ring in the sealing kit wear out or their sealing performance deteriorates after long-term use, operators can easily disassemble and replace them with new seals. This feature helps maintain a good sealing condition for the inflation equipment, reduces equipment maintenance costs and time, and extends the overall service life of the equipment.

[0034] Obviously, those skilled in the art can make various modifications and changes to the embodiments of this utility model without departing from the spirit and scope of this utility model. In this way, this utility model is also intended to cover such modifications and changes if they fall within the scope of the claims of this utility model and their equivalents. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are described in mutually different dependent claims does not indicate that a combination of these measures cannot be used for profit. Any reference numerals in the claims should not be considered as limiting the scope.

Claims

1. A sealing structure for an inflation device, characterized in that, The device includes a main body, a gas cylinder, a sealing kit, and a gas cylinder sleeve. The main body is provided with a piercing element, and the sealing kit is provided with at least two sets of sealing rings. The sealing kit is fitted onto the opening of the gas cylinder, and the gas cylinder is placed inside the gas cylinder sleeve. When the gas cylinder sleeve is engaged with the main body, the piercing element pierces the opening of the gas cylinder, and the at least two sets of sealing rings seal the neck of the gas cylinder and / or the inner wall of the main body.

2. The sealing structure according to claim 1, characterized in that, The sealing kit has an annular structure, and an annular groove is provided at the opening of the inner wall of the sealing kit. The two sets of sealing rings are placed side by side in the annular groove.

3. The sealing structure according to claim 2, characterized in that, A movable partition is provided between the two sets of sealing rings, and the inner diameter of the movable partition is larger than the diameter of the gas cylinder opening.

4. The sealing structure according to claim 3, characterized in that, The movable partition is made of rigid plastic.

5. The sealing structure according to claim 3, characterized in that, When the gas cylinder is introduced into the sealing kit, the lower sealing ring is deformed by the bottleneck of the gas cylinder, which pushes the movable partition to press the upper sealing ring to fit against the inner wall of the equipment body and the inner wall of the sealing kit.

6. The sealing structure according to claim 1, characterized in that, The sealing kit has an annular structure, and annular grooves are respectively provided on the inner and outer walls of the sealing kit. The two sets of sealing rings are respectively disposed in the annular grooves on the inner and outer walls.

7. The sealing structure according to claim 6, characterized in that, The inner wall of the sealing kit has an annular protrusion at the inlet below the sealing ring.

8. The sealing structure according to claim 6, characterized in that, The puncture device includes a pin extending from the inner wall of the device body, the head of which has a complete conical structure.

9. An inflation device, characterized in that, The device includes a sealing structure as described in any one of claims 1-8, wherein a pressure reducing valve is provided inside the device body.

10. An inflation device according to claim 9, characterized in that, A protruding structure is provided on the outer side of the device body, and a through hole structure is provided on the protruding structure.

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