Internal expansion type sealing plug

Abstract

The utility model discloses an internal expansion type sealing plug which comprises an installation disc, a first extrusion disc and a second extrusion disc, the left side and the right side of the installation disc are respectively provided with a convex structure protruding outwards, the peripheral face of each convex structure is fixedly connected with a rubber ring in a sleeved mode, and the interior of each rubber ring is hollow. The first extrusion disc and the second extrusion disc are arranged on the left side and the right side of the mounting disc correspondingly, grooves matched with the convex structures are formed in the sides, facing the mounting disc, of the first extrusion disc and the second extrusion disc correspondingly, and the convex structures on the two sides of the mounting disc slidably extend into the grooves of the first extrusion disc and the second extrusion disc correspondingly. A plurality of annularly-distributed sliding holes are formed in the two sides, facing the groove, of the installation disc. The rubber ring, the extrusion disc and other mechanisms are ingeniously combined, the pipeline plugging effect is achieved, the structural design is simple and clear, use is convenient and fast, production and maintenance cost is remarkably reduced, and good market popularization and application value is achieved.

Description

Technical Field

[0001] This utility model relates to the field of plug technology, and in particular to an internal expansion sealing plug. Background Technology

[0002] An internally expanding sealing plug is a component that achieves a seal by expanding its internal mechanism to fit tightly against the inner wall of a pipe. It is easy to install, highly adaptable, and can be used in pipes of various materials. It effectively prevents fluid leakage. With its excellent sealing performance and wide range of applications, internally expanding sealing plugs play an important role in many industries such as petrochemicals, food processing, and pharmaceuticals.

[0003] The existing utility model patent with application number CN202322196452.9 proposes an internally expanding sealing plug. The internally expanding sealing plug includes a tensioning component, a sealing ring is provided on one side of the tensioning component, and a first locking element and a second locking element are provided on the other side of the tensioning component... It can realize the self-locking function of the pipeline, making the sealing of the pipeline more reliable. It is not only easy to disassemble and assemble, but also can be reused, saving manpower and material resources and reducing costs.

[0004] Although the internal expansion sealing plugs shown in the prior art have several significant advantages, their complex structural design leads to relatively high production and maintenance costs, which to some extent limits their potential for widespread application and market promotion. Utility Model Content

[0005] The purpose of this utility model is to solve the problems mentioned in the background art, and to propose an internal expansion sealing plug.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An internally expanding sealing plug includes a mounting plate, a first extrusion plate, and a second extrusion plate. The mounting plate has outwardly protruding convex structures on its left and right sides, and a rubber ring is fixedly fitted onto the outer circumference of each convex structure. The rubber ring is hollow inside. The first and second extrusion plates are respectively located on the left and right sides of the mounting plate, and each has a groove matching the convex structure on its side facing the mounting plate. The convex structures on both sides of the mounting plate slide into the grooves of the first and second extrusion plates. The mounting plate has multiple annularly distributed sliding holes on both sides facing the grooves. The sliding holes are horizontally arranged, and a guide rod is slidably inserted into the inner wall of each sliding hole. One end of the guide rod passes through the sliding hole and is fixedly connected to the inner wall of the groove. The first extrusion plate is located away from the mounting plate. A first locking screw is inserted laterally on the side of the second extrusion plate. One end of the first locking screw passes through the first extrusion plate and is inserted into the mounting plate. The first locking screw and the mounting plate are connected by threads. The first locking screw and the first extrusion plate are rotatably connected. A second locking screw is inserted laterally on the side of the second extrusion plate away from the mounting plate. A sealing washer is fitted on the second locking screw. One side of the sealing washer abuts against the outer wall of the second extrusion plate. One end of the second locking screw passes through the second extrusion plate and is fitted with a slider. The slider and the second locking screw are connected by threads. The mounting plate has a groove corresponding to the slider on the side facing the second extrusion plate. One end of the slider slides into the groove and is fixedly connected to a spring. The end of the spring away from the slider is fixedly connected to the inner wall of the groove.

[0008] Preferably, an anti-loosening washer is fitted onto the first locking screw, and one side of the anti-loosening washer abuts against the outer wall of the first pressing disc.

[0009] Preferably, a fixing ring is fixedly sleeved on the guide rod, and one side of the fixing ring is fixedly connected to the inner sidewall of the groove.

[0010] Preferably, both sides of the slider are provided with arc-shaped grooves, and ball bearings are rolled on the inner sidewall of the arc-shaped grooves, with a portion of the ball bearings penetrating through the arc-shaped grooves.

[0011] Preferably, a semi-circular handle is fixedly connected to the side of the first extrusion disc away from the mounting disc.

[0012] Preferably, a rubber pad is fixedly connected to the inner wall of the handle.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model achieves effective sealing of the inside of the pipe through the ingenious combination of the first locking screw, the first extrusion plate, the guide rod and the rubber ring. At the same time, the structure is easy to disassemble, the design is simple and practical, and it effectively reduces production and maintenance costs.

[0015] 2. This utility model further enhances the sealing effect inside the pipe and significantly improves its practical performance through the integrated design of the second extrusion plate, rubber ring, second locking screw, slider and spring;

[0016] 3. This utility model ingeniously combines rubber rings and extrusion discs to achieve pipe sealing. It not only has a simple and clear structural design and is easy to use, but also significantly reduces production and maintenance costs, and has good market promotion and application value. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal expansion sealing plug proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the internally expanding sealing plug proposed in this utility model;

[0019] Figure 3 This is a partial side sectional view of the mounting plate of the internal expansion sealing plug proposed in this utility model.

[0020] In the diagram: 1-Mounting plate, 2-First pressing plate, 3-First locking screw, 4-Anti-loosening washer, 5-Guide rod, 6-Handle, 7-Second pressing plate, 8-Slider, 9-Spring, 10-First locking screw, 11-Sealing washer, 12-Fixing ring, 13-Rubber ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-3 The internal expansion sealing plug includes an installation plate 1, a first extrusion plate 2, and a second extrusion plate 7 for extruding a rubber ring 13. A semi-circular handle 6 is fixedly connected to the side of the first extrusion plate 2 away from the installation plate 1 for easy handling of the installation plate 1. A rubber pad is fixedly connected to the inner wall of the handle 6 to improve the grip. The left and right sides of the installation plate 1 are respectively provided with outwardly protruding convex structures, and a rubber ring 13 is fixedly fitted on the outer circumference of each convex structure for sealing the inner wall of the pipe. The interior of the rubber ring 13 is hollow to facilitate deformation. The first extrusion plate 2 and the second extrusion plate 7 are respectively located on the left and right sides of the installation plate 1, and a groove matching the convex structure is opened on the side facing the installation plate 1. The convex structures on both sides of the installation plate 1 slide into the grooves of the first extrusion plate 2 and the second extrusion plate 7 respectively.

[0023] In this embodiment, the mounting plate 1 has multiple annularly distributed sliding holes on both sides facing the groove. The sliding holes are arranged horizontally, and a guide rod 5 is slidably inserted into the inner wall of the sliding hole to guide the movement of the first extrusion plate 2 and the second extrusion plate 7. One end of the guide rod 5 passes through the sliding hole and is fixedly connected to the inner wall of the groove. A fixing ring 12 is fixedly sleeved on the guide rod 5 to support the guide rod 5. One side of the fixing ring 12 is fixedly connected to the inner wall of the groove. A first locking screw 3 is inserted horizontally on the side of the first extrusion plate 2 away from the mounting plate 1 to drive the first extrusion plate 2 to move. One end of the first locking screw 3 passes through the first extrusion plate 2 and is inserted into the mounting plate 1. The first locking screw 3 and the mounting plate 1 are connected by threads, and the first locking screw 3 and the first extrusion plate 2 are connected by rotation. An anti-loosening washer 4 is sleeved on the first locking screw 3 to prevent the first locking screw 3 from loosening. One side of the anti-loosening washer 4 abuts against the outer wall of the first extrusion plate 2.

[0024] In this embodiment, a second locking screw 10 is horizontally inserted on the side of the second extrusion plate 7 away from the mounting plate 1 to prevent the second extrusion plate 7 from loosening. A sealing washer 11 is fitted on the second locking screw 10 to improve the sealing performance. One side of the sealing washer 11 abuts against the outer wall of the second extrusion plate 7. One end of the second locking screw 10 passes through the second extrusion plate 7 and is fitted with a slider 8 to connect the second locking screw 10. The slider 8 and the second locking screw 10 are connected by threads.

[0025] In this embodiment, both sides of the slider 8 are provided with arc-shaped grooves, and the inner sidewall of the arc-shaped groove is connected with rolling balls to reduce the resistance when the slider 8 slides. Part of the rolling balls penetrates through the arc-shaped groove. The mounting plate 1 is provided with a sliding groove corresponding to the slider 8 on the side facing the second extrusion plate 7. One end of the slider 8 slides into the sliding groove and is fixedly connected with a spring 9 to prevent the slider 8 from completely detaching from the sliding groove. The end of the spring 9 away from the slider 8 is fixedly connected to the inner sidewall of the sliding groove.

[0026] In this embodiment, firstly, the mounting plate 1 is installed inside the pipe. Then, the first locking screw 3 is rotated using a wrench, screwdriver, or manually. Through the threaded engagement mechanism, the first locking screw 3 drives the first compression plate 2 to move closer to the mounting plate 1, thereby compressing the rubber ring 13. Thanks to the hollow design of the rubber ring 13, it deforms under pressure and fits tightly against the inner wall of the pipe, achieving pipe sealing. During the pressure test, water pressure acts on the second compression plate 7, generating axial thrust, which drives the second compression plate 7 (which is movably connected to the mounting plate 1 through the spring 9, slider 8, and second locking screw 10, so it can slide under external force) to slide towards the mounting plate 1. This sliding action causes the second compression plate 7 to compress the rubber ring 13, making it fit tightly against the inner wall of the pipe. This self-locking effect not only enhances the sealing effect of the pipe but also significantly improves the overall reliability and safety.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An internally expanding sealing plug, comprising an installation disc (1), a first extrusion disc (2), and a second extrusion disc (7), characterized in that: The mounting plate (1) has outwardly protruding convex structures on its left and right sides, and a rubber ring (13) is fixedly fitted on the outer circumference of each convex structure. The rubber ring (13) is hollow inside. The first extrusion plate (2) and the second extrusion plate (7) are respectively located on the left and right sides of the mounting plate (1), and a groove matching the convex structure is opened on the side facing the mounting plate (1). The convex structures on both sides of the mounting plate (1) slide into the grooves of the first extrusion plate (2) and the second extrusion plate (7). The mounting plate (1) has multiple annularly distributed sliding holes on both sides facing the grooves. The sliding holes are arranged horizontally. A guide rod (5) is slidably inserted on the inner wall of the sliding hole. One end of the guide rod (5) passes through the sliding hole and is fixedly connected to the inner wall of the groove. A first locking screw (3) is inserted horizontally on the side of the first extrusion plate (2) away from the mounting plate (1). One end of the first locking screw (3) passes through the first... A pressing disc (2) is inserted into the mounting disc (1). The first locking screw (3) is threadedly connected to the mounting disc (1). The first locking screw (3) is rotatably connected to the first pressing disc (2). A second locking screw (10) is horizontally inserted on the side of the second pressing disc (7) away from the mounting disc (1). A sealing washer (11) is fitted on the second locking screw (10). One side of the sealing washer (11) abuts against the outer wall of the second pressing disc (7). One end of the second locking screw (10) passes through the second pressing disc (7) and is fitted with a slider (8). The slider (8) is threadedly connected to the second locking screw (10). The mounting disc (1) has a groove corresponding to the slider (8) on the side facing the second pressing disc (7). One end of the slider (8) slides into the groove and is fixedly connected to a spring (9). The end of the spring (9) away from the slider (8) is fixedly connected to the inner wall of the groove.

2. The internal expansion sealing plug according to claim 1, characterized in that: An anti-loosening washer (4) is fitted onto the first locking screw (3), and one side of the anti-loosening washer (4) abuts against the outer wall of the first pressing disc (2).

3. The internal expansion sealing plug according to claim 1, characterized in that: A fixing ring (12) is fixedly sleeved on the guide rod (5), and one side of the fixing ring (12) is fixedly connected to the inner sidewall of the groove.

4. The internal expansion sealing plug according to claim 1, characterized in that: Both sides of the slider (8) are provided with arc-shaped grooves, and rolling balls are connected to the inner sidewall of the arc-shaped grooves, with a portion of the rolling balls penetrating through the arc-shaped grooves.

5. The internal expansion sealing plug according to claim 1, characterized in that: A semi-circular handle (6) is fixedly connected to the side of the first extrusion disc (2) away from the mounting disc (1).

6. The internal expansion sealing plug according to claim 5, characterized in that: A rubber pad is fixedly connected to the inner wall of the handle (6).

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