Negative pressure clamping fixture for ruptured diaphragm

Abstract

This utility model provides a negative pressure clamping fixture for a ruptured diaphragm, comprising: a negative pressure suction cup base, a negative pressure suction cup, a manual sliding valve, a vacuum gauge, and a sealing ring; a negative pressure chamber is formed inside the negative pressure suction cup base; the negative pressure suction cups are installed at intervals on the negative pressure suction cup base; a guide groove communicating with the negative pressure chamber is opened on the outward side of the negative pressure suction cup; the ruptured diaphragm is placed on the negative pressure suction cup at the corresponding guide groove; the manual sliding valve is installed on the negative pressure suction cup base and communicates with the negative pressure chamber, which is controlled by the manual sliding valve to communicate with a vacuum pump or the atmosphere; the vacuum gauge is installed on the negative pressure suction cup base and communicates with the negative pressure chamber. This application has the advantages of keeping the ruptured diaphragm flat during the polishing process, avoiding insecure fixing of the ruptured diaphragm and avoiding damage to the ruptured diaphragm, thus improving the repair efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of aerospace product technology, specifically, it relates to a negative pressure clamping tool for a ruptured diaphragm. Background Technology

[0002] The rupture diaphragm is an important component of the pressure valve in the pipeline of the launch vehicle's propellant tank. Its surface is prone to defects such as scratches, yellow spots, burrs, and poor flatness. At present, the production and processing have high requirements for the surface quality screening of the rupture diaphragm.

[0003] Patent document CN116608774B discloses a method, thickness detection equipment, and detection device for detecting the residual thickness of a structural component with grooves. The method includes: acquiring first point cloud data and second point cloud data of the structural component placed between a first laser detection unit and a second laser detection unit. The first point cloud data includes data from a first surface of the structural component, and the second point cloud data includes data from a second surface of the structural component. At least one of the first and second surfaces of the structural component is grooved, and the grooves correspond to multiple detection points. The first and second point cloud data are processed to determine the thickness of the multiple detection points. Thus, after a single positioning of the structural component, the residual thickness of all detection points on the grooves of the structural component can be detected.

[0004] Patent document CN116608774B involves inspecting the thickness of the produced diaphragm. Diaphragms that do not meet the thickness requirements need to be reworked. However, due to the material and size of the diaphragm, rework is difficult. Broken diaphragms generally have a minimum thickness requirement. Direct grinding during rework makes it difficult to control the thickness, which can easily lead to dimensional deviations and poor flatness. If ordinary jigs are used, they can easily leave indentations and scratches on the surface. In addition, ordinary jigs have low repair efficiency and it is difficult to control the grinding force, resulting in uneven surface roughness and easy deformation of the parts.

[0005] To maintain the flatness of the ruptured diaphragm during polishing, prevent insecure fixing and damage, and improve repair efficiency, this invention designs a negative pressure clamping fixture for ruptured diaphragms, solving the aforementioned problems. Utility Model Content

[0006] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a negative pressure clamping tool for ruptured diaphragms.

[0007] According to the present invention, a negative pressure clamping fixture for a ruptured diaphragm includes: a negative pressure suction cup base, a negative pressure suction cup, a manual sliding valve, and a vacuum pressure gauge. A negative pressure chamber is opened inside the base of the negative pressure suction cup; Negative pressure suction cups are installed at intervals on the negative pressure suction cup base; The negative pressure suction cup has an air guide groove on the outward side that connects to the negative pressure chamber; The ruptured diaphragm is placed on the negative pressure suction cup at the corresponding air guide groove; The manual sliding valve is installed on the base of the negative pressure suction cup and connected to the negative pressure chamber. The negative pressure chamber is connected to the vacuum pump or the atmosphere by the manual sliding valve. The vacuum pressure gauge is installed on the negative pressure suction cup base and connected to the negative pressure chamber.

[0008] Preferably, the negative pressure suction cup includes a negative pressure suction cup body and a suction surface; The negative pressure suction cup body is threadedly connected to the upper part of the negative pressure suction cup base at intervals, and the air guide groove extends downward along the top of the negative pressure suction cup body and connects to the negative pressure chamber. The suction surface is located at the top of the negative pressure suction cup body, and the outer edge of the ruptured diaphragm is placed on the suction surface.

[0009] Preferably, the negative pressure suction cup further includes an O-ring; The upper surface of the suction surface has a groove for accommodating the O-ring, and the O-ring abuts against the ruptured diaphragm.

[0010] Preferably, the negative pressure suction cup body can be detached from the negative pressure suction cup base and replaced with a negative pressure suction cup body of a different diameter.

[0011] Preferably, the manual sliding valve includes a cover and a valve body; One end of the valve body is screwed to the side wall of the negative pressure suction cup base and connected to the negative pressure chamber; The other end of the valve body is connected to the vacuum pump or the atmosphere via a casing.

[0012] Preferably, the connection points of the negative pressure suction cup, the manual sliding valve, the vacuum pressure gauge, and the negative pressure suction cup base are respectively provided with sealing rings to seal the connection end faces.

[0013] Preferably, the ruptured diaphragm is polished by rotating a wool felt polishing head.

[0014] Preferably, the vacuum pressure gauge is screwed onto the negative pressure suction cup base.

[0015] Preferably, the vacuum pressure gauge is installed on the side wall of the negative pressure suction cup base.

[0016] Preferably, the hand-operated valve is installed on the side wall of the negative pressure suction cup base.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model adopts a negative pressure clamping and fixing method to avoid damage caused by hard clamping, and can keep the broken diaphragm flat during the polishing process. 2. This utility model uses negative pressure tooling to ensure the accuracy of dimensional and geometric tolerances such as the outer diameter, thickness, and flatness of the diaphragm, and the clamping is reliable.

[0018] 3. This utility model can be installed at multiple workstations at the same time, which greatly improves the repair efficiency, and can be adapted to different diaphragms by changing the negative pressure suction cups with different diameter suction surfaces. Attached Figure Description

[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of the negative pressure suction cup of this utility model.

[0021] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0022] The diagram shows: 1. Negative pressure suction cup base; 2. Negative pressure suction cup; 21. Suction surface; 22. O-ring; 3. Manual sliding valve; 31. Cover; 32. Valve body; 4. Vacuum pressure gauge; 5. Sealing ring; 6. Ruptured diaphragm; 7. Wool felt polishing head; 8. Negative pressure chamber; 9. Air guide groove. Detailed Implementation

[0023] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0024] like Figures 1-3 As shown, a negative pressure clamping fixture for a ruptured diaphragm includes: a negative pressure suction cup base 1, a negative pressure suction cup 2, a manual sliding valve 3, and a vacuum pressure gauge 4. A negative pressure chamber 8 is formed inside the negative pressure suction cup base 1; The negative pressure suction cup 2 includes a negative pressure suction cup body 23, a suction surface 21, and an O-ring 22; The negative pressure suction cup body 23 is threadedly connected to the negative pressure suction cup base 1 at intervals. The top of the negative pressure suction cup body 23 is provided with an air guide groove 9 that communicates with the negative pressure chamber 8. The negative pressure suction cup body 23 can be replaced with different diameter sizes to meet the needs of fixing and mounting ruptured diaphragms 6 of different diameter sizes in actual work and production.

[0025] The suction surface 21 is located at the top of the negative pressure suction cup body 23, and the outer edge of the ruptured diaphragm 6 is placed on the suction surface 21; The upper surface of the suction surface 21 has a groove for accommodating the O-ring 22. The O-ring 22 abuts against the ruptured diaphragm 6, enhancing the negative pressure force of the air guide groove 9 on the ruptured diaphragm 6.

[0026] The manual sliding valve 3 includes a cover 31 and a valve body 32; One end of the valve body 32 is screwed to the side wall of the negative pressure suction cup base 1 and connected to the negative pressure chamber 8; The other end of the valve body 32 is controlled by the cover 31 to be connected to the vacuum pump or to the atmosphere, and the vacuum pump evacuates the negative pressure chamber 8. Vacuum pressure gauge 4 is screwed to the side wall of negative pressure suction cup base 1 and connected to negative pressure chamber 8.

[0027] The connection points of the negative pressure suction cup 2, the manual sliding valve 3, the vacuum pressure gauge 4, and the negative pressure suction cup base 1 are all equipped with sealing rings 5 ​​for end face sealing.

[0028] The ruptured diaphragm 6 is polished by rotating the wool felt polishing head 7.

[0029] The working principle of this utility model is as follows: the hand slide valve 3 turns on the vacuum pump, which drives the vacuum pump to draw the negative pressure chamber 8 into a negative pressure state. The pressure value of the negative pressure chamber 8 can be read by the vacuum pressure gauge 4. When the pressure value of the negative pressure chamber 8 reaches the expected value, the diaphragm 6 is broken to complete the fixed installation.

[0030] Multiple negative pressure suction cups 2 are fixed on the negative pressure suction cup base 1. The suction surface 21 on the negative pressure suction cup 2 uses the negative pressure in the negative pressure chamber 8 to adsorb the ruptured diaphragm 6 onto the suction surface 21, which plays a role in fixing and mounting.

[0031] The negative pressure suction cup 2 with different diameter suction surfaces 21 can be replaced to meet the needs of fixing and mounting ruptured diaphragms 6 with different diameters.

[0032] After the ruptured diaphragm 6 is polished on one side, the vacuum pump is turned off and the hand slide valve 3 is placed in the state of being connected to the atmosphere. Air enters the negative pressure chamber 8 through the hand slide valve 3. After the pressure on both sides of the ruptured diaphragm 6 is balanced, it separates from the suction surface 21.

[0033] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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. Therefore, they should not be construed as limitations on this application.

[0034] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A negative pressure clamping fixture for a ruptured diaphragm, characterized in that, include: Negative pressure suction cup base (1), negative pressure suction cup (2), manual sliding valve (3) and vacuum pressure gauge (4); The negative pressure suction cup base (1) has a negative pressure chamber (8) inside; Negative pressure suction cups (2) are installed at intervals on the negative pressure suction cup base (1); The negative pressure suction cup (2) has an air guide groove (9) on the outward side that connects to the negative pressure chamber (8); The ruptured diaphragm (6) is placed on the negative pressure suction cup (2) at the corresponding air guide groove (9); The hand slide valve (3) is installed on the negative pressure suction cup base (1) and connected to the negative pressure chamber (8). The negative pressure chamber (8) is connected to the vacuum pump or the atmosphere by the hand slide valve (3). The vacuum pressure gauge (4) is installed on the negative pressure suction cup base (1) and connected to the negative pressure chamber (8).

2. The negative pressure clamping fixture for the ruptured diaphragm according to claim 1, characterized in that, The negative pressure suction cup (2) includes a negative pressure suction cup body (23) and a suction surface (21); The negative pressure suction cup body (23) is threadedly connected to the negative pressure suction cup base (1) at intervals, and the air guide groove (9) extends downward along the top of the negative pressure suction cup body (23) and connects to the negative pressure chamber (8); The suction surface (21) is located at the top of the negative pressure suction cup body (23), and the outer edge of the ruptured diaphragm (6) is placed on the suction surface (21).

3. The negative pressure clamping fixture for the ruptured diaphragm according to claim 2, characterized in that, The negative pressure suction cup (2) also includes an O-ring (22); The upper surface of the suction surface (21) is provided with a groove for accommodating the O-ring (22), and the O-ring (22) abuts against the ruptured diaphragm (6).

4. The negative pressure clamping fixture for the ruptured diaphragm according to claim 3, characterized in that, The negative pressure suction cup body (23) can be detached from the negative pressure suction cup base (1) and replaced with a negative pressure suction cup body (23) of different diameter.

5. The negative pressure clamping fixture for the ruptured diaphragm according to claim 1, characterized in that, The manual sliding valve (3) includes a cover (31) and a valve body (32); One end of the valve body (32) is screwed to the side wall of the negative pressure suction cup base (1) and connected to the negative pressure chamber (8); The other end of the valve body (32) is controlled by the cover (31) to be connected to the vacuum pump or the atmosphere.

6. The negative pressure clamping fixture for the ruptured diaphragm according to claim 1, characterized in that, The connection points of the negative pressure suction cup (2), the hand slide valve (3), the vacuum pressure gauge (4) and the negative pressure suction cup base (1) are respectively provided with sealing rings (5) to seal the connection end faces.

7. The negative pressure clamping fixture for the ruptured diaphragm according to claim 1, characterized in that, The ruptured diaphragm (6) is polished by rotating a wool felt polishing head (7).

8. The negative pressure clamping fixture for the ruptured diaphragm according to claim 1, characterized in that, The vacuum pressure gauge (4) is screwed onto the negative pressure suction cup base (1).

9. The negative pressure clamping fixture for the ruptured diaphragm according to claim 1, characterized in that, The vacuum pressure gauge (4) is installed on the side wall of the negative pressure suction cup base (1).

10. The negative pressure clamping fixture for the ruptured diaphragm according to claim 1, characterized in that, The hand slide valve (3) is installed on the side wall of the negative pressure suction cup base (1).

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