Floating positioning type leak detection plug mechanism

Abstract

The utility model relates to a floating positioning type leak detection plug mechanism which comprises a guide block, a plugging block and a joint. The guide block is arranged at one axial end of the plugging block and is coaxially connected with the plugging block; the connector is arranged at the other axial end of the plugging block, the connector and the plugging block are in rotating fit at the center positions of the connector and the plugging block through a steel ball, and the connector is connected with the plugging block through a plurality of bolts distributed in the circumferential direction of the connector. A plurality of through holes are formed in the connector, the bolts penetrate through the through holes, and radial gaps are formed between the outer walls of the bolts and the inner walls of the through holes; the bolt is sleeved with a first elastic piece, and the first elastic piece is used for providing axial pre-tightening force, so that an axial gap is formed between the connector and the plugging block. The bolt is sleeved with a second elastic piece which is located in the axial gap. According to the utility model, the center of the plug is automatically calibrated, so that the plug is concentric with the hole, and the accuracy of leak hunting results and the testing efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of leak detection plugs, in particular to a floating positioning type leak detection plug mechanism. Background Art

[0002] When detecting the leakage of a product, a corresponding hole needs to be blocked by a plug. During the test, the plug is arranged on a corresponding fixture. Due to the problem that there are large tolerances between the processed dimensions of the product and the blank dimensions, the situation where the plug is not concentric with the hole will occur, resulting in a center deviation between the two, affecting the leakage detection of the product and causing the problem of misjudging qualified products as unqualified products. In response to this situation, the fixture needs to be continuously adjusted to align the center of the hole on the product with the center of the plug to achieve calibration. This calibration method is cumbersome to operate and has low production efficiency. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a floating positioning type leak detection plug mechanism, which can automatically calibrate the center of the plug to make it concentric with the hole when there is a deviation between the center of the product hole and the center of the plug.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A floating positioning type leak detection plug mechanism includes a guide block, a plug block and a joint;

[0006] The guide block is arranged at one axial end of the plug block and is coaxially connected with it;

[0007] The joint is arranged at the other axial end of the plug block. The joint and the plug block are rotationally matched through a steel ball at the center position between them, and the joint is connected with the plug block through a plurality of bolts distributed along its circumferential direction;

[0008] A plurality of through holes are arranged on the joint, and the through holes are used for passing through the bolts. A radial gap is formed between the outer wall of the bolt and the inner wall of the through hole;

[0009] A first elastic member is sleeved on the bolt, and the first elastic member is used to provide an axial pre-tightening force to form an axial gap between the joint and the plug block;

[0010] A second elastic member is sleeved on the bolt, and it is located in the axial gap.

[0011] The further technical scheme is as follows:

[0012] The through holes are arranged at the upper end of the joint, and a plurality of relief grooves are arranged on the circumferential side surface of the joint and communicate with the through holes for accommodating the bolts.

[0013] The first elastic member is a compression spring. One end of the compression spring is connected with the upper end surface of the relief groove, and the other end of the compression spring is connected with the tail end of the bolt.

[0014] The upper center of the joint is provided with an upper concave spherical surface for cooperating with the steel ball.

[0015] The first end surface of the plugging block is provided with a step for cooperating with the guiding block. The center of the second end surface of the plugging block is provided with a lower concave spherical surface for cooperating with the steel ball. The first end surface and the second end surface are respectively located at two axial ends of the plugging block.

[0016] A plurality of bolt holes are provided in the circumferential direction on the second end surface of the plugging block, and the bolt holes are matched with the bolts.

[0017] The second elastic member is an O-ring.

[0018] A gasket is provided between the guiding block and the plugging block.

[0019] The guiding block and the plugging block are connected by a locking member.

[0020] The guiding block is made of urethane rubber material.

[0021] The beneficial effects of the present utility model are as follows:

[0022] The present utility model realizes the automatic calibration of the center of the plug, makes the plug concentric with the hole of the product to be plugged, and avoids frequent adjustment of the fixture, which not only improves the accuracy of the leak detection result, but also improves the production efficiency.

[0023] Other features and advantages of the present utility model will be described in the subsequent specification or understood by implementing the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic three-dimensional structure diagram of an embodiment of the present utility model.

[0025] Figure 2 is Figure 1 the bottom view of

[0026] Figure 3 is Figure 2 the sectional view taken along the A-A section in

[0027] Figure 4 is Figure 3 the enlarged view of part A in

[0028] Figure 5 is a schematic structure diagram of the joint of the embodiment of the present utility model.

[0029] Figure 6 is a schematic structure diagram of the plugging block of the embodiment of the present utility model.

[0030] Figure 7 is Figure 6Another perspective.

[0031] In the figure: 1. Guide block; 2. Gasket; 3. Plugging block; 4. Second elastic member; 5. Connector; 6. First elastic member; 7. Steel ball; 8. Bolt; 9. Mounting hole; 10. Radial clearance; 11. Axial clearance; 31. Step; 32. Lower concave spherical surface; 33. Bolt hole; 51. Upper concave spherical surface; 52. Through hole; 53. Relief groove. Specific embodiments

[0032] The specific embodiments of the present utility model will be described below with reference to the accompanying drawings.

[0033] As Figures 1 to 4 shown, the floating positioning leak detection plugging head mechanism of this embodiment includes a guide block 1, a plugging block 3 and a connector 5; the guide block 1 is arranged at one axial end of the plugging block 3 and is coaxially connected thereto;

[0034] The connector 5 is arranged at the other axial end of the plugging block 3. The connector 5 and the plugging block 3 are rotationally matched through a steel ball 7 at the central position between them. The connector 5 is connected to the plugging block 3 through a plurality of bolts 8 distributed along its circumferential direction;

[0035] The connector 5 is provided with a plurality of through holes 52 for passing the bolts 8. A radial clearance 10 is formed between the outer wall of the bolt 8 and the inner wall of the through hole 52;

[0036] A first elastic member 6 is sleeved on the bolt 8. The first elastic member 6 is used to provide an axial pre-tightening force, so that an axial clearance 11 is formed between the upper end face of the connector 5 and the lower end face of the plugging block 3;

[0037] A second elastic member 4 is sleeved on the bolt 8 and is located in the axial clearance 11.

[0038] As Figure 5 shown, the through holes 52 are arranged at the upper end of the connector 5. A plurality of relief grooves 53 are arranged on the circumferential side surface of the connector 5 and are communicated with the through holes 52 for accommodating the bolts 8.

[0039] The first elastic member 6 is a compression spring. One end of the compression spring is connected to the upper end face of the relief groove 53, and the other end of the compression spring is connected to the tail end of the bolt 8.

[0040] The upper center of the connector 5 is provided with an upper concave spherical surface 51 for cooperating with the steel ball 7.

[0041] As Figure 6 and Figure 7 shown, the first end face of the plugging block 3 is provided with a step 31 for cooperating with the guide block 1. The center of the second end face of the plugging block 3 is provided with a lower concave spherical surface 32 for cooperating with the steel ball 7. The first end face and the second end face are respectively located at both axial ends of the plugging block 3.

[0042] On the second end face of the plugging block 3, a plurality of bolt holes 33 are provided along the circumferential direction, and the bolt holes 33 are matched with bolts 8.

[0043] As a specific implementation manner, the second elastic member 4 is an O-ring.

[0044] As a specific implementation manner, a gasket 2 is provided between the guiding block 1 and the plugging block 3.

[0045] As a specific implementation manner, refer to Figure 3 , the guiding block 1 and the plugging block 3 are provided with corresponding and communicating mounting holes 9, and the two are clamped and matched through a step 31 and connected through a locking member.

[0046] As a specific implementation manner, the guiding block 1 is made of urethane rubber. The outer contour of the guiding block 1 matches the shape of the hole to be plugged.

[0047] As a preferred implementation manner, a total of three bolts 8 are provided, and the three bolts 8 are evenly distributed along the circumferential direction with the steel ball 7 as the center.

[0048] The working principle of this embodiment is as follows:

[0049] The joint 5 is installed on the moving fixture of the equipment platform. The guiding block 1 and the plugging block 3 are fixedly connected into an upper component. The upper component and the joint 5 as the lower component are rotationally matched through the steel ball 7 and can rotate 360° relative to each other. And the plugging block 3 and the joint 5 are connected through bolts 8. The top end of the bolt 8 is locked with the plugging block 3 and thus fixed into an integral body with the upper component. At the same time, the bolt 8 is sleeved with the joint 5 and a radial gap 10 is formed. When the upper component rotates relative to the lower component, the radial gap 10 can enable radial offset between the two to prevent interference. The first elastic member 6 sleeved outside the bolt 8 is connected to the joint 5 (i.e., the lower component) at one end and connected to the bolt 8 (i.e., the upper component) at the other end, providing a pre-tightening force, an axial pre-tightening force, between the two, so that an axial gap 11 is formed between the joint 5 and the plugging block 3, and then the axial gap 11 is maintained at the initial distance through the second elastic member 4.

[0050] During operation, in the initial state, the upper component and the lower component are concentric. When the guiding block 1 moves forward in the direction of the hole to be plugged under the drive of the fixture, if the hole is not concentric with the guiding block 1, the upper component will receive an offset force from the hole wall and thus perform a radial micro-displacement relative to the lower component. At this time, the two elastic members respectively provide corresponding buffering forces (the first elastic member 6 is under pressure or tension, and the second elastic member 4 is under pressure), so that the guiding block 1 is concentric with the hole, realizing automatic calibration of the center of the guiding block 1 without the need to adjust and readjust the position of the fixture center repeatedly.

[0051] Those of ordinary skill in the art can understand that the above description is only the preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A floating positioning leak detection plugging mechanism, characterized in that: It comprises a guide block (1), a blocking block (3) and a joint (5); The guide block (1) is arranged at one axial end of the blocking block (3) and is coaxially connected thereto; The joint (5) is arranged at the other axial end of the blocking block (3), the joint (5) and the blocking block (3) are rotatably matched at the center of both via a steel ball (7), and the joint (5) is connected to the blocking block (3) via a plurality of bolts (8) distributed along its circumferential direction; The joint (5) is provided with a plurality of through holes (52), the through holes (52) being used to pass the bolts (8), and a radial gap (10) is formed between the outer wall of the bolt (8) and the inner wall of the through hole (52); A first elastic member (6) is sleeved on the bolt (8), and the first elastic member (6) is used to provide an axial pre-tightening force so that an axial gap (11) is formed between the joint (5) and the blocking block (3); The bolt (8) is sleeved with a second elastic member (4), which is located in the axial gap (11).

2. The floating positioning leak detection plugging mechanism according to claim 1 is characterized in that: The through hole (52) is arranged at the upper end of the joint (5), and a plurality of clearance grooves (53) are arranged on the circumferential side surface of the joint (5), which are communicated with the through hole (52) and are used to accommodate the bolts (8).

3. The floating positioning leak detection plugging mechanism according to claim 2 is characterized in that: The first elastic member (6) is a compression spring, one end of which is connected to the upper end surface of the clearance groove (53), and the other end of which is connected to the tail end of the bolt (8).

4. The floating positioning leak detection plugging mechanism according to claim 2 is characterized in that: An upper concave spherical surface (51) for cooperating with the steel ball (7) is provided at the center of the upper end of the joint (5).

5. The floating positioning leak detection plugging mechanism according to claim 1 is characterized in that: The first end face of the blocking block (3) is provided with a step (31) for cooperating with the guide block (1); the center of the second end face of the blocking block (3) is provided with a lower concave spherical surface (32) for cooperating with the steel ball (7); the first end face and the second end face are respectively located at two axial ends of the blocking block (3).

6. The floating positioning leak detection plugging mechanism according to claim 5 is characterized in that: A plurality of bolt holes (33) are provided on the second end surface of the blocking block (3) along the circumferential direction, and the bolt holes (33) cooperate with the bolts (8).

7. The floating positioning leak detection plugging mechanism according to claim 1 is characterized in that: The second elastic member (4) is an O-ring.

8. The floating positioning leak detection plugging mechanism according to claim 1 is characterized in that: A sealing gasket (2) is provided between the guide block (1) and the blocking block (3).

9. The floating positioning leak detection plugging mechanism according to claim 1 is characterized in that: The guide block (1) and the blocking block (3) are connected via a locking piece.

10. The floating positioning leak detection plugging mechanism according to claim 1, characterized in that: The guide block (1) is made of elastomeric material.

Images