Automatic sealing component

Abstract

According to the automatic sealing component, a piston cover is arranged in an inner sleeve to be matched in an outer sleeve, the piston cover can smoothly move in the outer sleeve, good air tightness can be achieved, a sealing cover is driven to move, an opening in the upper end of a filter cartridge is automatically sealed, the air tightness of the piston cover matched with the interior of the outer sleeve is good, and the piston cover cannot be clamped; the upper end of the inner sleeve is provided with a shrunk supporting shoulder which can be folded outwards to form a pressing edge after being matched with the piston cover, so that the piston cover is limited and prevented from being separated, and the lower end of the inner sleeve is provided with a shrunk supporting shoulder which can be folded outwards to form a pressing edge after being matched with the sealing cover, so that the sealing cover is connected and fixed; simple connection between the inner sleeve and the piston cover and between the inner sleeve and the sealing cover is achieved, stability is high, the manufacturing process is simple, and manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to the fields of spraying, polishing, dust removal, etc., and specifically relates to an automatic sealing component. Background Art

[0002] In the workpiece spraying / painting process, an air extraction filter cartridge is required. The upper end of the filter cartridge is installed in the negative pressure chamber, and the lower end is in the spraying chamber. An air extraction mechanism is arranged in the negative pressure chamber. The upper opening of the filter cartridge is sucked by an air extraction fan, and the air flow in the powder spraying chamber will flow towards the periphery of the filter cartridge and then flow out from the opening. During the powder spraying process, the excess splashed powder will accumulate around the filter cartridge along with the air flow and precipitate on the periphery below the filter cartridge. There will also be a lot of powder adsorbed on the filter membrane of the filter cartridge. After a period of use, there will be a lot of powder adsorbed in the filter membrane of the filter cartridge, blocking the entire filter cartridge, affecting the air flow through the filter cartridge, and unable to achieve the air extraction and filtration effect. It can be completed by setting a jet device in the filter cartridge in cooperation with a sealing component. The jet device blows air in the filter cartridge to blow the powder attached to the filter cartridge in the reverse direction, and then the cleaning of the filter cartridge can be completed. When blowing air, a sealing component is required to seal the upper opening of the filter cartridge before blowing air, so that the pressure inside the filter cartridge can increase, and it is better to blow the attached paint powder, dust, etc. in the reverse direction. The sealing component usually consists of an outer sleeve and a piston. The lower part of the piston is connected to the sealing cover through an inner sleeve. The piston drives the sealing cover to move downward to seal the upper opening of the filter cartridge. However, the existing sealing cover has a small pressure when sealing the upper opening of the filter cartridge and cannot seal the opening well. In addition, the connection between the upper end of the existing inner sleeve and the piston (welding) is troublesome, and the connection between the lower end of the inner sleeve and the sealing cover is also troublesome. The process is complex and the manufacturing cost is high. Summary of the Invention

[0003] As described in the above background art, the existing sealing cover has a small pressure when sealing the upper opening of the filter cartridge and cannot seal the opening well. In addition, the existing sealing component is troublesome to manufacture, the process is complex, and the manufacturing cost is high. The utility model provides an automatic sealing component. By arranging a piston cover in the inner sleeve to cooperate inside the outer sleeve, the piston cover can smoothly move inside the outer sleeve, and can achieve good air tightness, and drive the sealing cover to move to automatically seal the upper opening of the filter cartridge. The air tightness between the piston cover and the inner part of the outer sleeve is good and will not get stuck. In addition, the upper end of the inner sleeve is provided with a shrinking support shoulder, which can be turned outwards to form a pressing edge after cooperating with the piston cover to limit the piston cover and prevent it from detaching. The lower end of the inner sleeve is provided with a shrinking support shoulder, which can be turned outwards to form a pressing edge after cooperating with the sealing cover to connect and fix the sealing cover. The connection between the inner sleeve, the piston cover and the sealing cover is simple, the stability is strong, the manufacturing process is simple, and the manufacturing cost is low.

[0004] The technical solution adopted by the present utility model to solve the technical problem is: an automatic sealing component, including an outer sleeve, an inner sleeve, and a piston cover. An inner sleeve that can move is arranged inside the outer sleeve. A piston cover that cooperates with the inside of the outer sleeve is arranged at the upper end of the inner sleeve. The piston cover can move smoothly inside the outer sleeve. A sealing cover is arranged at the lower end of the inner sleeve. When gas is input into the outer sleeve, the gas pushes the piston cover and the inner sleeve to move downward, and the downward movement of the inner sleeve drives the integrally connected sealing cover to move downward.

[0005] The piston cover is composed of a plurality of pressing pieces and a plurality of air rings. The pressing pieces and the air rings are installed at the upper end of the inner sleeve. A movable gap is arranged between the pressing pieces and the air rings. The piston cover can move smoothly inside the outer sleeve and can achieve good airtightness. When air jets out of the air holes, it will push the piston cover and the inner sleeve to move downward, and the downward movement of the inner sleeve drives the integrally connected sealing cover to move downward.

[0006] A contracted support shoulder is arranged at the upper end of the inner sleeve for installing the pressing pieces and the air rings. The support shoulder can support and position the pressing pieces and the air rings.

[0007] The end of the support shoulder at the upper end of the inner sleeve can be flanged and expanded outward to form a pressing edge. The pressing edge can limit the pressing pieces and the air rings, so that the pressing pieces and the air rings are located in the support shoulder and prevent them from falling off. It is very convenient during the manufacturing of the inner sleeve and the installation of the pressing pieces and the air rings. The manufacturing process is simple, efficient, and can also save costs.

[0008] A contracted support shoulder is arranged at the lower end of the inner sleeve for connecting and fixing with the central hole of the sealing cover. The support shoulder at the lower end of the inner sleeve can be inserted into the central hole of the sealing cover. The end of the support shoulder can be flanged and expanded outward to form a pressing edge to tightly connect and fix with the sealing cover as a whole. The connection between the inner sleeve and the sealing cover is easy, the manufacturing process is simple, and the connection stability is strong.

[0009] A gasket ring is arranged on the support shoulder at the lower end of the inner sleeve. The gasket ring constitutes a larger support area in the support shoulder. Then, the support shoulder at the lower end of the inner sleeve is inserted into the central hole of the sealing cover and flanged and expanded outward to form a pressing edge to tightly connect and fix with the sealing cover as a whole. The connection stability between the inner sleeve and the sealing cover is better, the manufacturing process is also simple, and the cost is low.

[0010] The piston cover of the sealing component is formed by six pressing pieces and five air rings. The upper end of the inner sleeve is provided with a supporting shoulder. First, a pressing piece is placed on the upper end of the supporting shoulder, then an air ring is placed on the upper end face of the pressing piece. After that, a pressing piece is placed on the upper end of the air ring, and then an air ring is placed on the upper end of the pressing piece. In total, six pressing pieces and five air rings are placed in sequence. Then, the opening at the upper end of the inner sleeve is flanged outward to form a pressing edge, positioning the six pressing pieces and five air rings at the upper end of the inner sleeve. There is a movable gap between the pressing pieces and the air rings, enabling the pressing pieces and the air rings to automatically adjust the movable gap during movement. The manufacturing process is simple and efficient. Moreover, the piston cover formed by several pressing pieces and air rings can improve the airtightness, such that when the piston cover and the inner sleeve move downward, the sealing cover can cover the opening at the upper end of the filter cartridge with greater force.

[0011] The gap between the inner hole of the pressing piece of the piston cover and the outer wall of the upper supporting shoulder of the inner sleeve is 0.02 - 0.5 mm, and the gap between the inner hole of the air ring and the outer wall of the upper supporting shoulder of the inner sleeve is 0.1 - 0.8 mm.

[0012] The outer sleeve can be installed in the air inlet rod. The air inlet rod is provided with air holes for blowing air into the outer sleeve. When the air holes jet air, it will push the piston cover and the inner sleeve to move downward automatically. The downward movement of the inner sleeve drives the sealing cover connected as a whole to move downward. When the air holes of the air inlet rod jet air, it will push the piston cover and the sealing cover to move downward automatically to cover the opening at the upper end of the filter cartridge. The piston cover composed of pressing pieces and air rings has a good airtightness in cooperation with the outer sleeve. The pressure for pushing the piston cover can be close to the pressure intensity of the gas input into the air inlet rod, and when the sealing cover moves downward, it can better seal the opening at the upper end of the filter cartridge.

[0013] The beneficial effects of the present utility model are as follows: 1. By arranging a piston cover in the inner sleeve to cooperate inside the outer sleeve, the piston cover can move smoothly inside the outer sleeve, and can achieve good airtightness, and drive the sealing cover to move, automatically sealing the opening at the upper end of the filter cartridge. The piston cover has good airtightness in cooperation with the inside of the outer sleeve and will not get stuck. 2. The upper end of the inner sleeve is provided with a shrinking supporting shoulder, which can be flanged outward to form a pressing edge after cooperating with the piston cover, limiting the piston cover to prevent it from detaching, and the manufacturing process is simple. 3. The lower end of the inner sleeve is provided with a shrinking supporting shoulder, which can be flanged outward to form a pressing edge after cooperating with the sealing cover, connecting and fixing the sealing cover, realizing simple connection, strong stability, simple manufacturing process, and low manufacturing cost between the inner sleeve, the piston cover, and the sealing cover. 4. The piston cover composed of pressing pieces and air rings has good airtightness in cooperation with the outer sleeve. The pressure for pushing the piston cover can be close to the pressure intensity of the gas input into the air inlet rod, and when the sealing cover moves downward, it can better seal the opening. 5. The manufacturing process of the sealing component is simple, reducing the production and manufacturing cost, convenient to use, and having a broader application prospect. Brief Description of the Drawings

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0015] Figure 1 It is a view of the sealing component installed and used at the upper end of the filter cartridge;

[0016] Figure 2 It is a cross-sectional view of the sealing component installed in the fixed rod;

[0017] Figure 3 It is a cross-sectional view of the piston cover and the sealing cover installed in the inner sleeve;

[0018] Figure 4 It is a cross-sectional view of the inner sleeve after being installed and connected to the piston cover and the sealing cover;

[0019] Figure 5 It is a view of the lower end of the inner sleeve with a gasket ring provided on the support shoulder;

[0020] In the figure: 1, intake rod; 2, sealing cover; 3, inner sleeve; 4, outer sleeve; 5, filter cartridge; 6, pressing piece; 7, air ring; 8, crimping edge; 9, gasket ring; 10, air hole. Detailed Description of the Preferred Embodiment

[0021] An automatic sealing component includes an outer sleeve 4, an inner sleeve 3, and a piston cover. The outer sleeve 4 can be installed in the intake rod 1. The intake rod 1 is provided with an air hole 10 for blowing air into the outer sleeve 4. The outer sleeve 4 is provided with a movable inner sleeve 3. The upper end of the inner sleeve 3 is provided with a piston cover that cooperates with the inside of the outer sleeve 4. The piston cover can move smoothly inside the outer sleeve 4. The lower end of the inner sleeve 3 is provided with a sealing cover 2. When the air hole 10 of the intake rod 1 blows air, the gas enters the outer sleeve 4 and will push the piston cover and the inner sleeve 3 downward. The downward movement of the inner sleeve 3 drives the integrally connected sealing cover 2 downward.

[0022] The piston cover is composed of a plurality of pressing pieces 6 and a plurality of air rings 7. The pressing pieces 6 and the air rings 7 are installed at the upper end of the inner sleeve 3, and there is a movable gap between the plurality of pressing pieces 6 and the air rings 7. There is a movable gap between the pressing pieces 6 and the air rings 7 and the outer wall of the inner sleeve 3. The pressing pieces 6 and the air rings 7 can move smoothly inside the outer sleeve 4 and can achieve good airtightness. When the air hole 10 blows air, it will push the piston cover and the inner sleeve 3 downward. The downward movement of the inner sleeve 3 drives the integrally connected sealing cover 2 downward.

[0023] The upper end of the inner sleeve 3 is provided with a contracted support shoulder for installing the pressing pieces 6 and the air rings 7, and the support shoulder can support and position the pressing pieces 6 and the air rings 7.

[0024] The end of the supporting shoulder at the upper end of the inner sleeve 3 can be flanged and expanded outwards to form a crimping edge 8. The crimping edge 8 can limit the pressing piece 6 and the gas ring 7, so that the pressing piece 6 and the gas ring 7 are located in the supporting shoulder and prevent them from falling off. This makes it very convenient during the manufacturing of the inner sleeve 3 and the installation of the pressing piece 6 and the gas ring 7. The manufacturing process is simple, efficient, and can also save costs.

[0025] The gap between the inner hole of the pressing piece 6 of the piston cover and the outer wall of the supporting shoulder at the upper end of the inner sleeve 3 is 0.02 - 0.5 mm, preferably 0.1 - 0.3 mm. The gap between the inner hole of the gas ring 7 of the piston cover and the outer wall of the supporting shoulder at the upper end of the inner sleeve 3 is 0.1 - 0.8 mm, preferably 0.3 - 0.5 mm. A suitable gap is provided between the pressing piece 6 and the gas ring 7 and the inner sleeve 3. When the piston cover moves inside the outer sleeve 4, the pressing piece 6 and the gas ring 7 can freely adjust their positions without affecting the airtightness. And when dust enters the piston cover and the outer sleeve 4, the piston cover can move smoothly without being stuck.

[0026] The lower end of the inner sleeve 3 is provided with a contracted supporting shoulder for connecting and fixing with the central hole of the sealing cover 2. The supporting shoulder at the lower end of the inner sleeve 3 can be inserted into the central hole of the sealing cover 2, and the end of the supporting shoulder can be flanged and expanded outwards to form a crimping edge 8 for tightly connecting and fixing the sealing cover 2 as a whole. The connection between the inner sleeve 3 and the sealing cover 2 is easy, the manufacturing process is simple, and the connection stability is strong.

[0027] The supporting shoulder at the lower end of the inner sleeve 3 is provided with a gasket ring 9. The gasket ring 9 constitutes a larger supporting area in the supporting shoulder. Then the supporting shoulder at the lower end of the inner sleeve 3 is inserted into the central hole of the sealing cover 2 and flanged and expanded outwards to form a crimping edge 8 for tightly connecting and fixing the sealing cover 2 as a whole. The connection stability between the inner sleeve 3 and the sealing cover 2 is better, the manufacturing process is also simple, and the cost is low.

[0028] The piston cover is formed by joining six pressing pieces 6 and five gas rings 7. The upper end of the inner sleeve 3 is provided with a supporting shoulder. First, a pressing piece 6 is placed on the upper end of the supporting shoulder, then a gas ring 7 is placed on the upper end face of the pressing piece 6, then a pressing piece 6 is placed on the upper end of the gas ring 7, and then a gas ring 7 is placed on the upper end of the pressing piece 6. A total of six pressing pieces 6 and five gas rings 7 are placed in sequence. Then the opening at the upper end of the inner sleeve 3 is flanged and expanded outwards to form a crimping edge 8 to position the six pressing pieces 6 and five gas rings 7 at the upper end of the inner sleeve 3. A movable gap is left between the pressing piece 6 and the gas ring 7, so that the pressing piece 6 and the gas ring 7 can automatically adjust the movable gap during the movement process. The manufacturing process is simple and efficient. And the piston cover formed by joining several pressing pieces 6 and gas rings 7 can improve the airtightness, so that when the piston cover and the inner sleeve 3 move downwards, the sealing cover 2 can cover the opening at the upper end of the filter cartridge 5 with a greater force.

[0029] Optionally, but not limited thereto, the piston cover is a pressing piece 6 disposed in the supporting shoulder at the upper end of the inner sleeve 3, and then the opening at the upper end of the inner sleeve 3 is flanged outward to form a crimping edge 8 to position the pressing piece 6 at the upper end of the inner sleeve 3.

[0030] The end of the air inlet rod 1 is closed, and a jetting device can be installed in the air inlet rod 1 to jet air onto the surface of the filter cartridge 5. The upper end of the air inlet rod 1 can be connected to a high-pressure air pipe, and the high-pressure air pipe can input gas into the air inlet rod 1.

[0031] When the air holes 10 of the air inlet rod 1 jet air, it will push the piston cover and the sealing cover 2 downward to cover the opening at the upper end of the filter cartridge 5. The piston cover composed of the pressing piece 6 and the air ring 7 has a good airtightness in cooperation with the outer sleeve 4. The pressure for pushing the piston cover can be close to the pressure intensity of the gas input into the air inlet rod 1. When the sealing cover 2 moves downward, it can better seal the opening at the upper end of the filter cartridge 5, and the lower end of the filter cartridge 5 is a closed end, so a strong sealing property is formed at the upper and lower ends of the filter cartridge 5. When the air holes 10 of the air inlet rod 1 jet air, a negative pressure is generated at the upper end of the filter cartridge 12.

Claims

1. An automatic sealing component, comprising an outer sleeve, an inner sleeve, and a piston cover, characterized in that: An inner sleeve is movably disposed inside the outer sleeve. A piston cover that mates with the inside of the outer sleeve is provided at the upper end of the inner sleeve. The piston cover can smoothly move inside the outer sleeve. A sealing cover is provided at the lower end of the inner sleeve. When gas is input into the outer sleeve, the gas pushes the piston cover and the inner sleeve downward, and the downward movement of the inner sleeve drives the sealing cover, which is integrally connected, downward.

2. The automatic sealing component according to claim 1, wherein: The piston cover is composed of a pressing piece and a gas ring. The pressing piece and the gas ring are installed at the upper end of the inner sleeve. A movable gap is provided between the pressing piece and the gas ring, and the piston cover can smoothly move inside the outer sleeve.

3. The automatic sealing component according to claim 2, characterized in that: The upper end of the inner sleeve is provided with a constricted support shoulder for installing the pressing piece and the gas ring, and the support shoulder can support and position the pressing piece and the gas ring.

4. The automatic sealing component according to claim 3, characterized in that: The end of the support shoulder at the upper end of the inner sleeve can be flanged and expanded outward to form a pressing edge, and the pressing edge limits the pressing piece and the gas ring, so that the pressing piece and the gas ring are located in the support shoulder to prevent them from falling off.

5. The automatic sealing component according to claim 3 or 4, characterized in that: The lower end of the inner sleeve is provided with a constricted support shoulder for connecting and fixing with the central hole of the sealing cover.

6. The automatic sealing component according to claim 5, characterized in that: The support shoulder at the lower end of the inner sleeve can be inserted into the central hole of the sealing cover, and the end of the support shoulder can be flanged and expanded outward to form a pressing edge to tightly connect and fix the sealing cover integrally.

7. The automatic sealing component according to claim 6, wherein: A gasket ring is provided on the support shoulder at the lower end of the inner sleeve, and the gasket ring constitutes a larger support area in the support shoulder.

8. The automatic sealing component according to claim 6, characterized in that: The piston cover of the sealing component is formed by joining six pressing pieces and five gas rings. First, a pressing piece is placed on the support shoulder of the inner sleeve, then a gas ring is placed on the upper surface of the pressing piece, then a pressing piece is placed on the upper end of the gas ring, and then a gas ring is placed on the upper end of the pressing piece. In total, six pressing pieces and five gas rings are placed in sequence. Then, the opening at the upper end of the inner sleeve is flanged and expanded outward to form a pressing edge to position the six pressing pieces and five gas rings at the upper end of the inner sleeve.

9. The automatic sealing component according to claim 8, wherein: The gap between the inner hole of the pressing piece of the piston cover and the outer wall of the support shoulder at the upper end of the inner sleeve is 0.02 - 0.5 mm, and the gap between the inner hole of the gas ring and the outer wall of the support shoulder at the upper end of the inner sleeve is 0.1 - 0.8 mm.

10. An automatic sealing component according to any one of claims 1-4, characterized in that: The outer sleeve can be installed in the air inlet rod. The air inlet rod is provided with air holes for blowing air into the outer sleeve. When the air holes jet air, it will push the piston cover and the inner sleeve downward, and the downward movement of the inner sleeve drives the sealing cover, which is integrally connected, downward.

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