A fixture for testing the air tightness of irregular flanges

Abstract

This utility model provides a fixture for testing the airtightness of irregular flanges, including a support platform, with a base fixedly connected to the surface of the support platform; a piston rod fixedly connected to the center of the bottom surface of the base, and the piston rod slidably connected inside a cylinder; a fixing plate fixedly connected to the top of the cylinder; multiple grippers rotatably connected to the surface of the fixing plate; multiple clamping plates installed on the side walls of the base, with the grippers slidably connected to the side walls of the clamping plates; a rubber sleeve installed on the surface of the base, with multiple positioning pins installed on the surface of the rubber sleeve; the positioning pins engage the irregular flange, the irregular flange is placed on the surface of the rubber sleeve, and the grippers abut and compress the side walls of the irregular flange. The fixture for testing the airtightness of irregular flanges provided by this utility model has the advantages of quickly fixing the flange and ensuring the sealing of the connection.

Description

Technical Field

[0001] This utility model relates to the field of non-shaped flange inspection, and in particular to a fixture for testing the air tightness of non-shaped flanges. Background Technology

[0002] Special-shaped flanges are sealing and fastening fittings used in large containers, primarily in aerospace, petrochemical, and other fields. As a key component connecting pipelines and equipment, the airtightness of special-shaped flanges directly affects the safety of fluid systems. Testing can effectively prevent media leakage and avoid safety accidents caused by gas or liquid seepage.

[0003] When performing airtightness testing on irregular flanges, the flanges are placed on the test bench surface, and the contact surfaces of the two are tightly fitted to ensure a seal. However, due to the irregularity of the bottom surface of the irregular flanges, the position of the flanges is prone to deviation during placement and it is difficult to fix them on the test bench surface, which affects the sealing performance between the flanges and the test bench.

[0004] Therefore, it is necessary to provide a new fixture for testing the airtightness of irregular flanges to solve the above problems. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a fixture for testing the airtightness of irregular flanges that can quickly fix flanges and ensure the sealing of the connection.

[0006] To solve the above-mentioned technical problems, the present invention provides a fixture for testing the airtightness of irregular flanges, comprising: a support platform, a base fixedly connected to the surface of the support platform; a piston rod fixedly connected to the center of the bottom surface of the base, and the piston rod slidably connected inside a cylinder; a fixing plate fixedly connected to the top of the cylinder; multiple grippers rotatably connected to the surface of the fixing plate; multiple clamping plates installed on the side wall of the base, and grippers slidably connected to the side wall of the clamping plates; a rubber sleeve installed on the surface of the base, and multiple positioning pins installed on the surface of the rubber sleeve; the positioning pins engage the irregular flange, the irregular flange is placed on the surface of the rubber sleeve, and the grippers abut and press against the side wall of the irregular flange.

[0007] Preferably, the sidewall of the gripper is provided with a "V"-shaped groove, and a rotating shaft is fixedly connected between two adjacent grippers. The rotating shaft passes through the groove and is slidably connected to it.

[0008] Preferably, the rubber sleeve is fitted onto the surface of the support plate, the support plate is placed on the surface of the base, and a plurality of positioning pins are fixedly connected to the edge of the support plate.

[0009] Preferably, the shape of the top surface of the rubber sleeve is the same as the shape of the bottom surface of the irregular flange, and the area of ​​the top surface of the rubber sleeve is slightly larger than the area of ​​the bottom surface of the irregular flange.

[0010] Preferably, the bottom surface of the irregular flange is provided with multiple through holes, and the positioning pin passes through the through holes.

[0011] Preferably, the screw is threadedly connected to the support plate and the base, and a sealing ring is fitted on the side wall of the screw, with the sealing ring abutting against the surface of the rubber sleeve.

[0012] Compared with related technologies, the fixture for testing the airtightness of irregular flanges provided by this utility model has the following advantages:

[0013] This utility model provides a clamp for testing the airtightness of irregular flanges. When testing the airtightness of the irregular flange, it is placed on the surface of a rubber sleeve. The positioning pin ensures the flange is accurately positioned on the rubber sleeve surface, preventing misalignment. An external air pump is connected to the cylinder, and the cylinder begins to move. Since the top of the piston rod is fixed to the bottom surface of the base, the cylinder moves downwards along the piston rod. The cylinder drives the fixing plate and the gripper downwards. The sidewall of the gripper is rotatably connected to the clamping plate. As the gripper moves downwards, the gripper... The clamp rotates within the fixing plate and the clamping plate, causing the top of the clamping claws to press downwards against the side wall of the shaped flange, making the shaped flange tightly press against the side wall of the rubber sleeve. The shape of the top surface of the rubber sleeve is the same as the shape of the bottom surface of the shaped flange, and the area of ​​the top surface of the rubber sleeve is slightly larger than the area of ​​the bottom surface of the shaped flange, so that the bottom surface of the shaped flange is completely covered by the rubber sleeve. The two are fixed and pressed together by the clamping claws, increasing the sealing between the shaped flange and the rubber sleeve, thereby quickly fixing the shaped flange and sealing the bottom surface of the shaped flange, which facilitates the airtightness test of the shaped flange. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the fixture for testing the air tightness of irregular flanges provided by this utility model;

[0015] Figure 2 for Figure 1 The side view of the claw structure shown;

[0016] Figure 3 for Figure 1 The diagram shows the structure of the rubber sleeve.

[0017] Figure 4 for Figure 1 The diagram shows the jaw structure.

[0018] Figure 5 for Figure 1 The diagram shows the internal structure of the rubber sleeve.

[0019] Figure 6 for Figure 1 The diagram shows a non-standard flange structure.

[0020] The following are the labels in the diagram: 1. Support platform, 2. Cylinder, 21. Fixing plate, 22. Piston rod, 3. Base, 4. Rubber sleeve, 41. Support plate, 5. Special flange, 51. Through hole, 6. Clamping claw, 61. Slot, 7. Clamping plate, 71. Rotating shaft, 8. Positioning pin, 9. Screw, 91. Sealing ring. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1 to 6 , Figure 1 A schematic diagram of a preferred embodiment of the fixture for testing the air tightness of irregular flanges provided by this utility model; Figure 2 for Figure 1 The side view of the claw structure shown; Figure 3 for Figure 1 The diagram shows the structure of the rubber sleeve. Figure 4 for Figure 1 The diagram shows the jaw structure. Figure 5 for Figure 1 The diagram shows the internal structure of the rubber sleeve. Figure 6 for Figure 1The diagram shows a schematic of a non-standard flange structure. A fixture for testing the airtightness of a non-standard flange includes a support platform 1, with a base 3 fixedly connected to the surface of the support platform 1; a piston rod 22 is fixedly connected to the center of the bottom surface of the base 3, and the piston rod 22 is slidably connected inside a cylinder 2; a fixing plate 21 is fixedly connected to the top of the cylinder 2; multiple grippers 6 are rotatably connected to the surface of the fixing plate 21; multiple clamping plates 7 are installed on the side walls of the base 3, and the grippers 6 are slidably connected to the side walls of the clamping plates 7; a rubber sleeve 4 is installed on the surface of the base 3, and multiple positioning pins 8 are installed on the surface of the rubber sleeve 4; the positioning pins 8 engage the non-standard flange 5, the non-standard flange 5 is placed on the surface of the rubber sleeve 4, and the grippers 6 abut against and compress the side walls of the non-standard flange 5. During the airtightness test of the irregular flange 5, the irregular flange 5 is placed on the surface of the rubber sleeve 4. The positioning pin 8 ensures the irregular flange 5 is accurately positioned on the surface of the rubber sleeve 4, preventing misalignment. An external air pump is connected to the cylinder 2, and the cylinder 2 begins to move. Since the top end of the piston rod 22 is fixed to the bottom surface of the base 3, the cylinder 2 moves downwards along the piston rod 22. The cylinder 2 drives the fixing plate 21 and the gripper 6 downwards. The side wall of the gripper 6 is rotatably connected to the clamping plate 7. As the gripper 6 moves downwards, the gripper 6 is positioned on the fixing plate 21 and... The clamping plate 7 rotates internally, causing the top of the clamping claw 6 to press downward against the side wall of the shaped flange 5, making the shaped flange 5 tightly press against the side wall of the rubber sleeve 4. The top surface of the rubber sleeve 4 has the same shape as the bottom surface of the shaped flange 5, and the area of ​​the top surface of the rubber sleeve 4 is slightly larger than the area of ​​the bottom surface of the shaped flange 5, so that the bottom surface of the shaped flange 5 is completely covered by the rubber sleeve 4. The two are fixed and pressed together by the clamping claw 6, increasing the sealing between the shaped flange 5 and the rubber sleeve 4, thereby quickly fixing the shaped flange 5 and sealing the bottom surface of the shaped flange 5, which facilitates the airtightness test of the shaped flange 5.

[0023] The gripper 6 has a V-shaped groove 61 on its side wall. A rotating shaft 71 is fixedly connected between two adjacent clamping plates 7. The rotating shaft 71 passes through the groove 61 and is slidably connected to it. When the fixed plate 21 drives the gripper 6 to move up and down, the groove 61 on the side wall of the gripper 6 slides across the side wall of the rotating shaft 71. The groove 61 has a V-shaped cross-section. When the gripper 6 moves downward, the rotating shaft 71 slides inside the groove 61 and pushes the top of the gripper 6 to rotate toward the rubber sleeve 4. When the gripper 6 moves upward, the rotating shaft 71 pushes the top of the gripper 6 to rotate away from the rubber sleeve 4.

[0024] The rubber sleeve 4 is fitted onto the surface of the support plate 41, and the support plate 41 is placed on the surface of the base 3. Multiple positioning pins 8 are fixedly connected to the edge of the support plate 41. The bottom surface of the irregular flange 5 is provided with multiple through holes 51, and the positioning pins 8 pass through the through holes 51. In order to facilitate the positioning pins 8 passing through the through holes 51, the irregular flange 5 is accurately placed on the surface of the rubber sleeve 4, so that the rubber sleeve 4 is aligned with the irregular flange 5.

[0025] The screw 9 is threadedly connected to the support plate 41 and the base 3. A sealing ring 91 is fitted onto the side wall of the screw 9, and the sealing ring 91 abuts against the surface of the rubber sleeve 4. When it is necessary to inspect the irregular flange 5 with different bottom shapes, the screw 9 is rotated to remove it from the inside of the support plate 41. The original support plate 41 is removed, and a replacement support plate 41 corresponding to the irregular flange 5 to be inspected is placed on the surface of the base 3. The support plate 41 is then rotated so that the... The surface of the support plate 41 is aligned with the claw 6, facilitating the rotation of the claw 6 to press the irregular flange 5 above the support plate 41. The sealing ring 91 is fitted onto the side wall of the screw 9 and rotated into the interior of the support plate 41 and the base 3. As the screw 9 enters, the two press against each other, fixing the support plate 41. The screw 9 also presses against the sealing ring 91, causing the sealing ring 91 to adhere tightly to the surface of the rubber sleeve 4, thus sealing the top surface of the rubber sleeve 4 and preventing air leakage from the top surface of the rubber sleeve 4.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A fixture for testing the airtightness of irregularly shaped flanges, characterized in that, include: A support platform (1) is fixedly connected to a base (3) on its surface; a piston rod (22) is fixedly connected to the center of the bottom surface of the base (3), and the piston rod (22) is slidably connected inside the cylinder (2); a fixing plate (21) is fixedly connected to the top of the cylinder (2). The surface of the fixed plate (21) is rotatably connected to multiple clamps (6), and multiple clamps (7) are installed on the side wall of the base (3). The side wall of the clamps (7) is slidably connected to the clamps (6). A rubber sleeve (4) is installed on the surface of the base (3), and multiple positioning pins (8) are installed on the surface of the rubber sleeve (4). The positioning pins (8) engage the irregular flange (5), the irregular flange (5) is placed on the surface of the rubber sleeve (4), and the clamps (6) abut against and squeeze the side wall of the irregular flange (5).

2. The fixture for testing the air tightness of irregular flanges according to claim 1, characterized in that, The side wall of the gripper (6) is provided with a "V" shaped slot (61), and a rotating shaft (71) is fixedly connected between two adjacent clamping plates (7). The rotating shaft (71) passes through the slot (61) and is slidably connected to it.

3. The fixture for testing the air tightness of irregular flanges according to claim 1, characterized in that, The rubber sleeve (4) is fitted onto the surface of the support plate (41), the support plate (41) is placed on the surface of the base (3), and a plurality of positioning pins (8) are fixedly connected to the edge of the support plate (41).

4. The fixture for testing the air tightness of irregular flanges according to claim 3, characterized in that, The shape of the top surface of the rubber sleeve (4) is the same as the shape of the bottom surface of the irregular flange (5), and the area of ​​the top surface of the rubber sleeve (4) is greater than the area of ​​the bottom surface of the irregular flange (5).

5. The fixture for testing the air tightness of irregular flanges according to claim 3, characterized in that, The bottom surface of the irregular flange (5) is provided with multiple through holes (51), and the positioning pin (8) passes through the through holes (51).

6. The fixture for testing the air tightness of irregular flanges according to claim 3, characterized in that, The screw (9) is threadedly connected to the support plate (41) and the base (3), and the side wall of the screw (9) is fitted with a sealing ring (91), and the sealing ring (91) abuts against the surface of the rubber sleeve (4).

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