A radially flexible floating compensation external expansion plugging mechanism

Abstract

The utility model discloses an external expansion sealing mechanism with radial flexible floating compensation, comprising: a sealing shell, an expansion opening for a workpiece pipe mouth to enter is opened at one end of the sealing shell, a compression sealing ring matched with the workpiece pipe mouth is arranged at the expansion opening, a guide inner expansion block is slidably matched in the sealing shell, a driving air port is arranged on the sealing shell, the driving air port is connected with the compressed gas so that the guide inner expansion block moves toward the compression sealing ring and squeezes the compression sealing ring, a return spring for resetting the guide inner expansion block is sleeved on the guide inner expansion block, the elastic force of the return spring is less than the pressure of the compressed gas, the sealing shell is provided with a first air inlet for filling with detection gas, and the first air inlet is connected with the expansion opening; through the above method, the utility model can compensate for the processing error of the workpiece, thereby realizing the docking of the workpiece and the sealing mechanism when the workpiece is automatically sealed.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing detection, in particular to an external expansion plugging mechanism with radial flexible floating compensation. Background Art

[0002] During the helium inspection process, usually in a vacuum environment, the enclosed space inside the workpiece is evacuated and filled with helium, and the helium concentration is measured in the vacuum environment outside the workpiece to determine whether the workpiece is leaking. For some automated production lines, the sealing of the workpiece is usually also required to be automatically sealed.

[0003] At present, in practical applications, the pipe mouth of the workpiece may cause position deviation due to factors such as design, processing, and assembly, which makes it impossible for the automatic sealing mechanism to be quickly and accurately inserted into the pipe mouth of the workpiece, affecting the sealing efficiency. In severe cases, it may even lead to the inability to ensure the sealing during sealing, affecting the actual detection quality and posing certain detection risks. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a radial flexible floating compensation expansion plugging mechanism, which can compensate for the processing error of the workpiece, so as to achieve the docking of the workpiece and the plugging mechanism when the workpiece is automatically plugged.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a radial flexible floating compensation external expansion sealing mechanism, including: a sealing shell, one end of the sealing shell is provided with an expansion opening for the workpiece pipe mouth to enter, a compression sealing ring matching the workpiece pipe mouth is arranged at the expansion opening, a guide inner expansion block is slidably matched in the sealing shell, a driving air port is arranged on the sealing shell, the driving air port is connected with the compressed gas so that the guide inner expansion block moves toward the compression sealing ring and squeezes the compression sealing ring, a return spring is sleeved on the guide inner expansion block to reset the guide inner expansion block, the elastic force of the return spring is less than the pressure of the compressed gas, and the sealing shell is provided with a first air inlet for filling the detection gas, and the first air inlet is connected with the expansion opening.

[0006] Preferably, a plugging head fixing seat is provided at one end of the plugging shell, and the expansion opening is opened on the plugging head fixing seat.

[0007] Preferably, a compensating shell is arranged at one end of the sealing shell away from the expansion mouth, a compensating rod is movably fitted inside the compensating shell, a compensating ring is arranged between the compensating shell and the compensating rod, the compensating rod is connected to the sealing shell, and the compensating rod is provided with a second air inlet, which is connected to the first air inlet.

[0008] Preferably, one end of the compensating shell away from the blocking shell is connected to a first pushing member, and the first pushing member is connected to the first base.

[0009] Preferably, a second pushing member is connected to the lower side of the compensation shell, and the second pushing member is connected to the second base.

[0010] Preferably, a connecting rod is connected between the compensation shell and the first pushing member, the connecting rod is connected to a fixed connecting block, the fixed connecting block is connected to the first pushing member, and the connecting rod is connected to the compensation shell.

[0011] Preferably, the material of the compensation ring is polyurethane.

[0012] Preferably, a bearing is sleeved on the compensation rod, and the bearing is arranged between the compensation housing and the compensation rod, and the bearing is used to limit the range of movement of the compensation rod.

[0013] Preferably, an O-ring is provided on the guiding inner expansion block, and the O-ring is used to seal the interior of the sealing shell.

[0014] The beneficial effects of the utility model are:

[0015] 1. Through the expansion mouth, the pipe mouth of the workpiece can enter the fixed seat of the plugging head. Under the action of compressed air, the guide inner expansion block compresses the compression sealing ring to deform, so that the compression sealing ring forms a sealed contact with the outer wall of the workpiece during the deformation process, avoiding the machining error of the workpiece affecting the sealing effect;

[0016] 2. By compressing the deformation of the sealing ring, the expansion opening is made concentric with the workpiece tube, and then the deformation of the compensation ring is used to further compensate for the concentricity of the expansion opening and the workpiece tube, thereby compensating for the error of the workpiece and achieving a stable connection between the sealing mechanism and the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0020] The markings of the components in the accompanying drawings are as follows:

[0021] 1. Sealing shell; 2. Sealing head fixing seat; 3. Expansion mouth; 4. Compression sealing ring; 5. Guide inner expansion block; 6. Driving air port; 7. O-ring; 8. Return spring; 9. First air inlet; 10. Compensation shell; 11. Compensation rod; 12. Compensation ring; 13. Second air inlet; 14. Bearing; 15. First pusher; 16. First base; 17. Second pusher; 18. Second base; 19. Connecting rod; 20. Fixed connecting block. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0028] Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0029] Example:

[0030] refer to Figure 1-Figure 3 A radial flexible floating compensation external expansion plugging mechanism comprises: a plugging shell 1, a plugging head fixing seat 2 is installed at one end of the plugging shell 1, a bulging opening 3 for the pipe mouth of the workpiece to enter is provided on the plugging head fixing seat 2, a compression sealing ring 4 matching with the pipe mouth of the workpiece is provided at the bulging opening 3, a guide inner expansion block 5 is slidably matched in the plugging shell 1, a driving air port 6 is provided on the plugging shell 1, the driving air port 6 is connected with the compressed gas so that the guide inner expansion block 5 moves toward the compression sealing ring 4 and squeezes the compression sealing ring 4, so that the compression sealing ring 4 is squeezed and deformed, and the deformed compression sealing ring 4 will contact the outer shape of the workpiece pipe, and as the deformation of the compression sealing ring 4 increases, its contact area with the workpiece also increases, and finally it is completely sealed with the pipe mouth of the workpiece. An O-ring 7 is sleeved on the guide inner expansion block 5, and the O-ring 7 is used to seal the inside of the plugging shell 1. A return spring 8 is sleeved on the guide inner expansion block 5 to reset the guide inner expansion block 5. The elastic force of the return spring 8 is less than the pressure of the compressed gas. Therefore, when the guide inner expansion block 5 is not compressed by the compressed gas, the guide inner expansion block 5 is reset by the return spring 8, and then the compressed sealing ring 4 is no longer squeezed and reset, so that it is convenient to take away the detected workpiece. The blocking shell 1 is provided with a first air inlet 9 for filling the detection gas, and the first air inlet 9 is connected to the expansion port 3. The detection gas can be helium.

[0031] refer to Figure 1-Figure 3 After the workpiece pipe mouth enters the expansion opening 3, the compressed gas enters the sealing shell 1 through the driving gas port 6 and pushes the guiding inner expansion block 5 to move toward the compression sealing ring 4 and squeezes and deforms the compression sealing ring 4. During the process of being squeezed and deformed, the compression sealing ring 4 contacts the outer wall of the workpiece pipe and forms a seal with the outer wall of the workpiece pipe. The detection gas helium used to detect air leakage enters the interior of the sealing shell 1 and enters the workpiece through the first air inlet 9. By detecting the concentration of helium in the vacuum environment outside the workpiece, it is judged whether there is a leakage, thereby determining whether the sealing of the workpiece meets the standard.

[0032] refer to Figure 1-Figure 3 In order to provide a certain position compensation and adaptability for the plugging head fixing seat 2, a compensation shell 10 is arranged at one end of the plugging shell 1 away from the expansion mouth 3, and a compensation rod 11 is movably matched in the compensation shell 10. The material of the compensation ring 12 is polyurethane. A compensation ring 12 is arranged between the compensation shell 10 and the compensation rod 11, that is, the compensation ring 12 is sleeved on the compensation rod 11, and the compensation rod 11 is connected to the plugging shell 1. The compensation rod 11 is provided with a second air inlet 13, and the second air inlet 13 is connected to the first air inlet 9. Therefore, when there is a position deviation of the workpiece due to factors such as design, processing, and assembly, the compensation ring 12 will deform when the workpiece is extended into the expansion mouth 3, so that the plugging head fixing seat 2 is offset, and then used to compensate for the position deviation of the workpiece, so that the workpiece can be normally sealed. A bearing 14 is sleeved on the compensation rod 11, and the bearing 14 is installed between the compensation shell 10 and the compensation rod 11. The bearing 14 is used to limit the range of movement of the compensation rod 11, and also limits the deformation range of the compensation ring 12. The detection gas enters the sealing shell 1 from the second gas inlet 13 through the first gas inlet 9 and then enters the workpiece.

[0033] refer to Figure 1-Figure 3 To further improve the adaptability of the blocking mechanism to automation, the end of the compensation housing 10 away from the blocking housing 1 is connected to a first pusher 15, and the first pusher 15 is connected to a first base 16. Therefore, when the workpiece needs to be inspected, the first pusher 15 can move the blocking head fixing seat 2 toward the workpiece and perform subsequent steps.

[0034] refer to Figure 1-Figure 3 The lower side of the compensation housing 10 is connected to a second pusher 17, which is connected to a second base 18, so that the position of the sealing mechanism is blocked by the two pushers in a synchronous position, thereby improving the sealing accuracy and stability, and making the entire structure more stable. Both the first pusher 15 and the second pusher 17 can be cylinders.

[0035] refer to Figure 1-Figure 3In order to support the position of the entire mechanism and to seal the connection between the shell 1 and the first pusher 15, a connecting rod 19 is connected between the compensation shell 10 and the first pusher 15, and the connecting rod 19 is connected to a fixed connecting block 20, the fixed connecting block 20 is connected to the first pusher 15, and the connecting rod 19 is connected to the compensation shell 10.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A radially flexible floating compensation expansion plugging mechanism, characterized in that: include: The invention comprises a plugging shell (1), one end of which is provided with an expansion opening (3) for a workpiece pipe opening to enter, a compression sealing ring (4) matching with the workpiece pipe opening is arranged at the expansion opening (3), a guide inner expansion block (5) is slidingly matched in the plugging shell (1), a driving air port (6) is arranged on the plugging shell (1), the driving air port (6) is connected with compressed gas so that the guide inner expansion block (5) moves toward the compression sealing ring (4) and squeezes the compression sealing ring (4), a return spring (8) is sleeved on the guide inner expansion block (5) for resetting the guide inner expansion block (5), the elastic force of the return spring (8) is less than the pressure of the compressed gas, and the plugging shell (1) is provided with a first air inlet (9) for filling with detection gas, and the first air inlet (9) is connected with the expansion opening (3).

2. The radially flexible floating compensation external expansion plugging mechanism according to claim 1, characterized in that: A plugging head fixing seat (2) is provided at one end of the plugging shell (1), and the expansion opening (3) is opened on the plugging head fixing seat (2).

3. The radially flexible floating compensation external expansion plugging mechanism according to claim 1, characterized in that: A compensation shell (10) is arranged at one end of the blocking shell (1) away from the expansion opening (3); a compensation rod (11) is movably fitted inside the compensation shell (10); a compensation ring (12) is provided between the compensation shell (10) and the compensation rod (11); the compensation rod (11) is connected to the blocking shell (1); a second air inlet (13) is provided on the compensation rod (11); and the second air inlet (13) is connected to the first air inlet (9).

4. The radially flexible floating compensation external expansion plugging mechanism according to claim 3 is characterized in that: One end of the compensating shell (10) away from the blocking shell (1) is connected to a first pushing member (15), and the first pushing member (15) is connected to a first base (16).

5. The radially flexible floating compensation external expansion plugging mechanism according to claim 4, characterized in that: The lower side of the compensation housing (10) is connected to a second pushing member (17), and the second pushing member (17) is connected to a second base (18).

6. The radially flexible floating compensation external expansion plugging mechanism according to claim 4, characterized in that: A connecting rod (19) is connected between the compensation housing (10) and the first pushing member (15), the connecting rod (19) is connected to a fixed connecting block (20), the fixed connecting block (20) is connected to the first pushing member (15), and the connecting rod (19) is connected to the compensation housing (10).

7. The radially flexible floating compensation external expansion plugging mechanism according to claim 3, characterized in that: The material of the compensation ring (12) is polyurethane.

8. The radially flexible floating compensation external expansion sealing mechanism according to claim 3, characterized in that: A bearing (14) is sleeved on the compensation rod (11), and the bearing (14) is arranged between the compensation housing (10) and the compensation rod (11). The bearing (14) is used to limit the range of movement of the compensation rod (11).

9. The radially flexible floating compensation external expansion plugging mechanism according to claim 1, characterized in that: An O-ring (7) is provided on the guiding inner expansion block (5), and the O-ring (7) is used to seal the interior of the sealing shell (1).

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