A leak-proof seal structure

Abstract

The utility model discloses a kind of leak-proof sealing structures, it is related to mechanical sealing technical field, including device mounting seat body and rotating shaft, the front end of device mounting seat body is penetrated and is provided with mounting groove, the inboard of mounting groove is provided with fixed sealing assembly, the front side of fixed sealing assembly is provided with movable sealing assembly, the fixed sealing assembly includes the fixed outer ring inserted in the inside of mounting groove, the inboard of fixed outer ring is fixedly connected with fixed inner ring, the utility model forms outside sealing by first sealing ring and second sealing ring, forms middle layer labyrinth seal to docking groove, outer connecting convex ring and second leak-proof cavity, sealing cavity and dynamic rubber sealing ring form core dynamic sealing, constitute three layers of leak-proof defense line, substantially reduce the leakage probability, while receiving box can accurately collect leakage, avoid leakage pollution equipment component or external environment, receiving box can be pulled and cleaned, without disassembling sealing structure, reduce the complexity of maintenance.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, specifically to a leak-proof sealing structure. Background Technology

[0002] In the fields of machinery and chemical engineering, the mating point between the rotating shaft and the fixed mounting base of the equipment is a high-risk area for leakage. The core function of the leak-proof sealing structure is to prevent liquids and impurities from entering the equipment or leaking to the outside through the gap between the two.

[0003] Traditional leak-proof sealing structures often use a single sealing ring to directly seal the gap between the rotating shaft and the mounting base. After long-term rotation, the sealing ring is prone to wear, leading to an increase in the sealing gap and leakage. Once the sealing ring is worn, the leaked material can directly penetrate into the equipment or flow to the external ground, causing component corrosion, lubricant contamination, and even chemical leaks and other safety accidents. Therefore, a leak-proof sealing structure is proposed to solve the problems mentioned above. Utility Model Content

[0004] To solve the above-mentioned technical problems, a leak-proof sealing structure is provided. This technical solution addresses the issues raised in the background section regarding the traditional leak-proof sealing structures, which often use a single sealing ring to directly seal the gap between the rotating shaft and the mounting base. After long-term rotation, the sealing ring is prone to wear, leading to an increase in the sealing gap and leakage. Furthermore, once the sealing ring is worn, the leaked material can directly penetrate into the equipment or flow to the external ground, causing component corrosion, lubricant contamination, and even chemical leaks and other safety accidents.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A leak-proof sealing structure includes a device mounting base body and a rotating shaft. The front end of the device mounting base body is provided with a mounting groove, a fixed sealing component is provided inside the mounting groove, and a movable sealing component is provided in front of the fixed sealing component. The fixed sealing assembly includes a fixed outer ring inserted into the mounting groove, a fixed inner ring fixedly connected to the inner side of the fixed outer ring, an inner connecting protrusion fixedly connected to the front end of the fixed inner ring, an outer connecting protrusion fixedly connected to the front end of the fixed outer ring, an installation positioning ring fixedly connected to the outer side of the outer connecting protrusion, an inner limiting ring fixedly connected to the inner side of the outer connecting protrusion, a first sealing groove opened on the outer side of the fixed outer ring, a first sealing ring embedded inside the first sealing groove, a first leak-proof cavity opened on the inner side of the fixed inner ring, a first outlet opened through the bottom end of the fixed inner ring, and a second outlet opened through the bottom end of the outer connecting protrusion. The movable sealing assembly includes a movable inner ring sleeved on the outer surface of the rotating shaft, a movable outer ring fixedly connected to the outer side of the movable inner ring, a mating ring fixedly connected to the outer side of the movable outer ring, a mating groove at the rear end of the mating ring, a second leak-proof cavity at the outer side of the movable outer ring behind the mating ring, a second sealing groove at the inner side of the movable inner ring, and a second sealing ring embedded inside the second sealing groove.

[0006] Preferably, a sealing cavity is formed between the movable outer ring and the movable inner ring and the inner connecting convex ring, and a dynamic rubber sealing ring is provided inside the sealing cavity.

[0007] Preferably, the lower ends of the outer connecting protruding ring and the fixed inner ring are fixedly connected to the corresponding positions of the second outlet and the first outlet, and a receiving box is inserted into the inside of the receiving box.

[0008] Preferably, a pull rod is fixedly connected to the outside of the receiving box, and a pull block is fixedly connected to the other end of the pull rod.

[0009] Preferably, the outer connecting protrusion is inserted into the inside of the mating groove, the rotating shaft is rotatably connected to the inside of the fixed inner ring, and the inner limiting ring is disposed inside the second leak-proof cavity.

[0010] Preferably, the rear end of the mounting positioning ring abuts against the front end of the device mounting base body, and the outer diameter of the inner connecting convex ring increases sequentially from front to back.

[0011] The advantages of this utility model compared with the prior art are: This solution proposes a leak-proof sealing structure. An outer seal is formed by a first and a second sealing ring. The insertion and engagement of the mating groove and the outer connecting protrusion ring, together with the second leak-proof cavity, form a middle-layer labyrinth seal, which can extend the penetration path of leaked materials and reduce the probability of leakage. The sealing cavity and the dynamic rubber sealing ring form a core dynamic seal, constituting a three-layer leak-proof defense line, which significantly reduces the probability of leakage. At the same time, the receiving box can accurately collect leaked materials, preventing them from contaminating equipment components or the external environment. The receiving box can be pulled out for cleaning without disassembling the sealing structure, reducing the complexity of maintenance. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle; Figure 4 This is a schematic diagram of the fixed sealing assembly in this utility model; Figure 5 This is a schematic diagram of the movable sealing component in this utility model; Figure 6 This is a schematic diagram of the material receiving box in this utility model.

[0013] The numbers on the map are: 1. Device mounting base body; 2. Mounting slot; 3. Rotating shaft; 4. Fixed sealing assembly; 401. Fixed outer ring; 402. Fixed inner ring; 403. Inner connecting convex ring; 404. Outer connecting convex ring; 405. Mounting positioning ring; 406. Inner limiting ring; 407. First sealing groove; 408. First sealing ring; 409. First leak-proof cavity; 5. Movable sealing assembly; 501. Movable outer ring; 502. Butt ring; 503. Movable inner ring; 504. Butt groove; 505. Second leak-proof cavity; 506. Second sealing groove; 507. Second sealing ring; 6. First outlet; 601. Second outlet; 7. Receiving bin; 8. Receiving box; 9. Sealing cavity; 10. Dynamic rubber sealing ring; 11. Pull rod; 12. Pull block. Detailed Implementation

[0014] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0015] Reference Figures 1-6 As shown, a leak-proof sealing structure includes a device mounting base body 1 and a rotating shaft 3. The front end of the device mounting base body 1 is provided with a mounting groove 2. A fixed sealing component 4 is provided inside the mounting groove 2, and a movable sealing component 5 is provided in front of the fixed sealing component 4. The fixed sealing assembly 4 includes a fixed outer ring 401 inserted into the mounting groove 2, a fixed inner ring 402 fixedly connected to the inner side of the fixed outer ring 401, an inner connecting protrusion ring 403 fixedly connected to the front end of the fixed inner ring 402, an outer connecting protrusion ring 404 fixedly connected to the front end of the fixed outer ring 401, an installation positioning ring 405 fixedly connected to the outer side of the outer connecting protrusion ring 404, an inner limiting ring 406 fixedly connected to the inner side of the outer connecting protrusion ring 404, a first sealing groove 407 opened on the outer side of the fixed outer ring 401, a first sealing ring 408 embedded in the first sealing groove 407, a first leak-proof cavity 409 opened on the inner side of the fixed inner ring 402, a first outlet 6 penetrating through the bottom end of the fixed inner ring 402, and a second outlet 601 penetrating through the bottom end of the outer connecting protrusion ring 404. The movable sealing assembly 5 includes a movable inner ring 503 sleeved on the outer surface of the rotating shaft 3. A movable outer ring 501 is fixedly connected to the outer side of the movable inner ring 503. A mating ring 502 is fixedly connected to the outer side of the movable outer ring 501. A mating groove 504 is provided at the rear end of the mating ring 502. A second leak-proof cavity 505 is provided on the outer side of the movable outer ring 501 behind the mating ring 502. A second sealing groove 506 is provided on the inner side of the movable inner ring 503. A second sealing ring 507 is embedded inside the second sealing groove 506.

[0016] Furthermore, the device mounting base body 1 serves as the connection carrier between the entire sealing structure and the equipment. One end of the rotating shaft 3 is connected to the equipment's power component, such as a motor, and the other end extends to the equipment's working chamber. The movable sealing assembly 5 rotates as a whole with the rotating shaft 3.

[0017] Furthermore, a sealing cavity 9 is formed between the movable outer ring 501 and the movable inner ring 503 and the inner connecting convex ring 403, and a dynamic rubber sealing ring 10 is provided inside the sealing cavity 9.

[0018] Furthermore, the outer connecting protrusion ring 404 is inserted into the inside of the docking groove 504, the rotating shaft 3 is rotatably connected to the inner side of the fixed inner ring 402, and the inner limiting ring 406 is set inside the second leak-proof cavity 505.

[0019] Furthermore, the rear end of the mounting positioning ring 405 abuts against the front end of the device mounting base body 1, and the outer diameter of the inner connecting convex ring 403 increases sequentially from front to back, forming a conical transition surface.

[0020] Furthermore, the fixed outer ring 401 is inserted into the interior of the mounting groove 2 via an interference fit, serving to connect the fixed inner ring 402 to the device mounting base body 1. By installing the first sealing ring 408 in the first sealing groove 407 to fill the tiny gap between the fixed outer ring 401 and the mounting groove 2, leakage between the mounting groove 2 and the fixed outer ring 401 can be blocked. The fixed inner ring 402 serves as the static sealing boundary on the outside of the rotating shaft 3, and its inner first leak-proof cavity 409 is used to buffer and temporarily store leakage material that breaks through the inner seal. The inner connecting convex ring 403 is connected to the movable outer ring 501 and movable inner ring of the movable sealing assembly 5. The inner connecting ring 403 fits to form a sealing cavity 9 for installing the dynamic rubber sealing ring 10. The tapered transition surface of the inner connecting convex ring 403 can guide the dynamic rubber sealing ring 10 to fit, reducing frictional resistance during rotation. The outer connecting convex ring 404 positions the movable sealing assembly 5 through an insertion fit. The second outlet 601 is used to discharge the leakage from the second leak-proof cavity 505. The mounting positioning ring 405 is used to limit the axial depth of the fixed sealing assembly 4 in the mounting groove 2, ensuring the accurate mating position of the fixed sealing assembly 4 and the movable sealing assembly 5, while enhancing the connection stability between the fixed outer ring 401 and the mounting base.

[0021] Furthermore, the mating ring 502 engages with the outer connecting protruding ring 404 via the mating groove 504, positioning the radial position of the movable sealing assembly 5 and forming the outer boundary of the second leak-proof cavity 505. The inner limiting ring 406 serves as the inner boundary of the second leak-proof cavity 505, guiding the leaked material towards the second outlet 601. The second leak-proof cavity 505 temporarily stores the leaking material from the front end of the mating groove 504, preventing it from directly contacting the dynamic sealing assembly. Simultaneously, the leaking material is guided to the receiving box 8 through the second outlet 601. The movable inner ring 503 is fitted with a sealing ring through the second sealing groove 506, blocking the gap between the rotating shaft 3 and the movable inner ring 503, preventing liquid or impurities from penetrating from the front end of the movable sealing assembly 5 through the gap between the shaft and the movable inner ring 503 into the dynamic sealing area. The sealing cavity 9 provides installation space for the dynamic rubber sealing ring 10, which forms a dynamic seal between the fixed sealing assembly 4 and the movable sealing assembly 5, blocking the leakage between the two sealing assemblies.

[0022] Furthermore, the lower ends of the outer connecting protruding ring 404 and the fixed inner ring 402 are fixedly connected to the corresponding positions of the second row outlet 601 and the first row outlet 6, and a receiving box 8 is inserted into the inside of the receiving box 7.

[0023] Furthermore, a pull rod 11 is fixedly connected to the outside of the receiving box 8, and a pull block 12 is fixedly connected to the other end of the pull rod 11.

[0024] Furthermore, the receiving bin 7 is used to guide the leaked material flowing out from the first outlet 6 or the second outlet 601 to fall accurately into the receiving box 8, so as to avoid the leaked material dripping onto the equipment or the ground and causing pollution. The receiving box 8 can be pulled out along the length of the bin body. The pull rod 11 provides a force point for pulling out the receiving box 8, and the pull block 12 is used to increase the gripping area at the end of the pull rod 11, so that the operator can easily pinch the pull block 12 to pull out the receiving box 8 and avoid slipping.

[0025] Working principle: During use, the first sealing ring 408 seals the gap between the fixed outer ring 401 and the mounting groove 2, blocking external leakage from the rear. The second sealing ring 507 seals the gap between the movable inner ring 503 and the rotating shaft 3, blocking leakage from the front working cavity. The mating groove 504 and the outer connecting convex ring 404 form a labyrinth seal, extending the penetration path of leakage from the front. The dynamic rubber sealing ring 10 fits tightly with the inner connecting convex ring 403, the movable outer ring 501, and the movable inner ring 503 within the sealing cavity 9, blocking the dynamic gap between the two sealing components. In case of leakage, when a small amount of leaked material breaks through the outer seal formed by the first sealing ring 408 and the second sealing ring 507, the leaked material on the rear side will enter the first leak-proof cavity 409 through the gap between the fixed inner ring 402 and the rotating shaft 3. Under the action of gravity, it will flow along the cavity wall to the first discharge outlet 6 and be guided by the receiving bin 7 to fall into the rear receiving box 8. The leaked material on the front side will enter the second leak-proof cavity 505 through the gap between the docking groove 504 and the outer connecting protrusion ring 404. It will flow along the cavity wall to the second discharge outlet 601 and be guided by the receiving bin 7 to fall into the front receiving box 8.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A leak-proof sealing structure, characterized in that, The device includes a mounting base body (1) and a rotating shaft (3). The front end of the mounting base body (1) is provided with a mounting groove (2). A fixed sealing component (4) is provided on the inner side of the mounting groove (2), and a movable sealing component (5) is provided on the front side of the fixed sealing component (4). The fixed sealing assembly (4) includes a fixed outer ring (401) inserted into the mounting groove (2), a fixed inner ring (402) fixedly connected to the inner side of the fixed outer ring (401), an inner connecting protrusion ring (403) fixedly connected to the front end of the fixed inner ring (402), an outer connecting protrusion ring (404) fixedly connected to the front end of the fixed outer ring (401), an installation positioning ring (405) fixedly connected to the outer side of the outer connecting protrusion ring (404), an inner limiting ring (406) fixedly connected to the inner side of the outer connecting protrusion ring (404), a first sealing groove (407) opened on the outer side of the fixed outer ring (401), a first sealing ring (408) embedded in the interior of the first sealing groove (407), a first leak-proof cavity (409) opened on the inner side of the fixed inner ring (402), a first outlet (6) opened through the bottom end of the fixed inner ring (402), and a second outlet (601) opened through the bottom end of the outer connecting protrusion ring (404). The movable sealing assembly (5) includes a movable inner ring (503) sleeved on the outer surface of the rotating shaft (3), a movable outer ring (501) fixedly connected to the outer side of the movable inner ring (503), a docking ring (502) fixedly connected to the outer side of the movable outer ring (501), a docking groove (504) is provided at the rear end of the docking ring (502), a second leak-proof cavity (505) is provided on the outer side of the movable outer ring (501) behind the docking ring (502), a second sealing groove (506) is provided on the inner side of the movable inner ring (503), and a second sealing ring (507) is embedded in the interior of the second sealing groove (506).

2. The leak-proof sealing structure according to claim 1, characterized in that: The movable outer ring (501) and movable inner ring (503) form a sealing cavity (9) with the inner connecting convex ring (403), and a dynamic rubber sealing ring (10) is provided inside the sealing cavity (9).

3. The leak-proof sealing structure according to claim 1, characterized in that: The lower ends of the outer connecting protrusion ring (404) and the fixed inner ring (402) are fixedly connected to the corresponding positions of the second outlet (601) and the first outlet (6) with receiving bins (7), and receiving boxes (8) are inserted into the inside of the receiving bins (7).

4. The leak-proof sealing structure according to claim 3, characterized in that: A pull rod (11) is fixedly connected to the outside of the receiving box (8), and a pull block (12) is fixedly connected to the other end of the pull rod (11).

5. The leak-proof sealing structure according to claim 1, characterized in that: The outer connecting protrusion ring (404) is inserted into the inside of the docking groove (504), the rotating shaft (3) is rotatably connected to the inside of the fixed inner ring (402), and the inner limiting ring (406) is set inside the second leak-proof cavity (505).

6. The leak-proof sealing structure according to claim 1, characterized in that: The rear end of the mounting positioning ring (405) abuts against the front end of the device mounting base body (1), and the outer diameter of the inner connecting convex ring (403) increases sequentially from front to back.

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