Bell and spigot sealing device

Abstract

The utility model provides a socket sealing device belongs to cast iron pipe processing equipment field, including support body, support body is annular structure, support body end is close to the water baffle ring of support body inner surface one end has, the outer surface of water baffle ring has the water seal ring, and the water seal ring is connected with support body setting, its characterized in that: the water seal ring cross section is L shape structure, forms the placement groove between the adjacent water seal ring corner edge, and the placement groove is located close to the water baffle ring side, and the placement groove is annular structure, sealing ring, sealing ring is annular structure, sealing ring is located in the placement groove, and the outer surface of sealing ring and the inboard wall of placement groove are in contact, and the inner surface of sealing ring always and the outer surface of water baffle ring are in contact, the utility model is applicable to the bearing in socket support device and seals, avoids the bearing and leads to the lubrication effect drop because of water, installs the water seal ring between support body and water baffle ring, connects the sealing ring on the water seal ring, makes sealing ring and water baffle ring and water seal ring contact further seal the gap.

Description

Technical Field

[0001] This utility model relates to the field of cast iron pipe processing equipment, specifically to a socket sealing device. Background Technology

[0002] In centrifuge equipment, the sealing structure of the socket support device is crucial to ensuring the normal operation of its internal bearings. Its core function is to prevent external water from entering the device, avoiding a decrease in the lubrication effect of the bearings due to water ingress, thereby ensuring the stable operation and service life of the socket support device.

[0003] In existing technology, early centrifuges were designed for immersion, with the machine body filled with pressurized water and the drain outlet located at the top of the machine body. In this case, the socket support device used a VD sealing ring for sealing—under the pressure of water, the lip of the VD sealing ring could fit tightly against the surface of the sealing ring, so that even if the sealing ring was rotating, water could not enter the interior of the socket support device from the sealing surface, thus effectively protecting the internal bearing.

[0004] However, with increasing production demands, the centrifuge underwent a technical upgrade, becoming a spray-type water-cooled centrifuge. After the upgrade, high-pressure water is sprayed directly onto the mold tubes through nozzles to enhance cooling, and the drain outlet is moved to the bottom of the machine body, eliminating the need for water storage inside. This change resulted in significant defects in the original sealing structure: Previously, a U-shaped groove was placed at the end of the sealing ring, and the VD sealing ring was placed within it, with the end of the VD sealing ring contacting the water-blocking ring for compression. However, without the pressure of the pressurized water inside the machine, the fit between the lip of the VD sealing ring and the sealing surface is no longer tight, leading to a significant decrease in sealing performance. Furthermore, during the spraying process, the water sprayed from the high-pressure nozzles continuously impacts the sealing area. Under pressure, water easily seeps from the gaps in the sealing surface into the bearing support device, directly contacting the bearing. When water enters the bearing, the lubricating grease will be diluted or contaminated, resulting in severely poor lubrication. This can lead to problems such as accelerated bearing wear, abnormal noise, and even jamming, significantly shortening the service life of the bearing support device. It also increases the frequency and cost of equipment maintenance, negatively impacting production efficiency. Utility Model Content

[0005] In view of this, the present invention provides a socket sealing device, which can further seal the gap by installing a water sealing ring between the support body and the water-blocking ring, and connecting a sealing ring on the water sealing ring, so that the sealing ring abuts against the water-blocking ring and the water sealing ring.

[0006] To solve the above-mentioned technical problems, this utility model provides a socket sealing device, including a support body with an annular structure. Bearings are installed through the support body. A water-retaining ring is installed at the end of the support body, and a rotating disk is connected below the water-retaining ring. When the water-retaining ring is sealed to the rotating disk, it protects the bearing located in the support body. There is a gap between the support body and the water-retaining ring. A sealing ring is sealed to the support body to fill the gap between the support body and the water-retaining ring, preventing water from entering the bearing.

[0007] The sealing ring has an L-shaped cross-section, and a placement groove is formed between the corners of adjacent sealing rings. The placement groove is located near the water-blocking ring and has an annular structure. The sealing ring is placed inside the placement groove. The sealing ring has an annular structure, and its outer surface abuts against the inner wall of the placement groove. The inner surface of the sealing ring always abuts against the outer surface of the water-blocking ring. Using the sealing ring to further seal and abut against the contact area between the sealing ring and the water-blocking plate can effectively prevent the bearing from experiencing a decrease in lubrication due to water ingress.

[0008] The sealing ring has an open end and a U-shaped groove inside. The U-shaped groove is connected to the open end and has an elastic element inside. The elastic element is annular and is used to squeeze the fabric-insulated oil seal towards the water-blocking ring, so that the sealing ring is always in contact with the water-blocking ring, thus preventing water from entering the support body.

[0009] The elastic element is a fabric-reinforced oil seal spring, a key auxiliary component in the fabric-reinforced oil seal structure. It is typically a ring-shaped helical spring (also known as a "clamping spring"), installed inside the oil seal lip. Its function is to enhance the sealing performance by continuously pressing the oil seal lip against the shaft surface with radial force.

[0010] The outer surface of the sealing ring has a relief groove at the contact point with the water-retaining ring. The relief groove can reduce the contact area between the middle part of the sealing ring and the water-retaining ring when the elastic element squeezes the sealing ring. This prevents the water-retaining ring from increasing the contact area with the sealing cavity when it rotates, which would cause the sealing ring to deform and allow water to flow from the deformed part of the sealing ring to the bearing.

[0011] The sealing ring is connected to a pressure plate at its end. The end of the pressure plate near the sealing ring abuts against the end of the sealing cavity to limit the sealing ring and fix it in place within the cavity. This provides all-around limitation of the sealing ring and prevents it from deforming. The pressure plate and the sealing ring are detachably connected by bolts, which facilitates the replacement of the elastic element and the sealing ring later.

[0012] The elastic element is a fabric-reinforced oil seal. The fabric-reinforced oil seal uses a fabric layer (such as cotton or polyester) as a skeleton, which greatly improves the overall mechanical strength of the oil seal. It can resist the tearing force caused by radial runout, vibration or installation deviation of the shaft. Compared with pure rubber oil seals, fabric-reinforced oil seals are less prone to deformation and damage under high pressure or impact conditions, thus extending their service life.

[0013] The outer surface of the sealing ring has a sealing groove with an annular structure. Inside the sealing groove is a sealing element with an annular structure. The outer surface of the sealing element abuts against the inner surface of the support body, which can seal the outer surface of the sealing ring and prevent water from entering the bearing from the connection between the sealing ring and the support body.

[0014] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0015] 1. Enhanced sealing performance and effective waterproofing: By filling the gap between the support body and the water-blocking ring with the water-sealing ring, and in conjunction with the sealing ring in the placement groove, the outer surface of the sealing ring is in contact with the inner side wall of the placement groove, and the inner surface is always in contact with the outer surface of the water-blocking ring, forming a multi-layer sealing structure. This can effectively prevent high-pressure water in the spray-type water-cooled centrifuge from seeping in through the gaps and avoid water entering the bearing.

[0016] 2. Ensure bearing lubrication: Prevent water from entering the bearing housing and contacting it, avoid diluting or contaminating the bearing lubricating grease, maintain good bearing lubrication, and reduce bearing wear, abnormal noise, and jamming caused by poor lubrication.

[0017] 3. Improve sealing stability: The elastic element inside the sealing ring (such as the fabric-reinforced oil seal spring) continuously presses the sealing ring towards the water-retaining ring, ensuring that the sealing ring and the water-retaining ring are always tightly fitted, and maintaining a good sealing effect even under conditions such as equipment vibration during operation.

[0018] 4. Reduced maintenance costs and frequency: Due to stable sealing performance and strong component durability, the probability of damage to core components such as bearings is reduced, thereby reducing the number of equipment maintenance and replacement costs, which helps to improve production efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the socket sealing device of this utility model;

[0020] Figure 2 This is a cross-sectional view of the sealing ring of this utility model;

[0021] Figure 3 This utility model Figure 2 A schematic diagram of the partial structure at point A in the middle.

[0022] Explanation of reference numerals in the attached drawings: 1. Support body; 2. Water-retaining ring; 3. Water-sealing ring; 4. Placement groove; 5. Sealing ring; 6. U-shaped groove; 7. Elastic element; 8. Relief groove; 9. Pressure plate; 10. Sealing groove; 11. Sealing element. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-3 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0024] like Figure 1 , 2 As shown in Figure 3:

[0025] This embodiment provides a socket sealing device, including a support body 1. The support body 1 is a ring structure and is the basic component of the entire device, used to install core components such as bearings. A water-retaining ring 2 is installed at the end of the support body 1. The lower part of the water-retaining ring 2 is connected to the rotating disk, and the two are sealed together. This connection method can initially protect the bearing inside the support body 1, preventing external water from directly contacting the bearing. However, there is a gap between the support body 1 and the water-retaining ring 2. To seal this gap, a sealing ring 3 is sealed and connected to the support body 1. The sealing ring 3 precisely fills the gap between the support body 1 and the water-retaining ring 2, further preventing water from entering the bearing.

[0026] like Figure 1 , 2 As shown:

[0027] The water-sealing ring 3 has an L-shaped cross-section, and a placement groove 4 is formed between the corner edges of adjacent water-sealing rings 3. This placement groove 4 is located on the side closer to the water-retaining ring 2 and is annular in shape. Its function is to place a sealing ring 5, which is also annular in structure. The outer surface of the sealing ring 5 abuts against the inner wall of the placement groove 4, while the inner surface always abuts against the outer surface of the water-retaining ring 2. Through this connection and contact relationship, the sealing ring 5 can further seal the contact area between the water-sealing ring 3 and the water-retaining ring 2, effectively preventing the bearing from experiencing a decrease in lubrication due to water ingress.

[0028] like Figure 2 , 3 As shown:

[0029] The sealing ring 5 has an open end and an annular U-shaped groove inside, which connects to the open end. An elastic element 7, also annular in structure, is installed inside the U-shaped groove. Its function is to press the sealing ring 5 towards the water-retaining ring 2, ensuring that the sealing ring 5 remains in contact with the water-retaining ring 2, thus preventing water from entering the support body 1. Specifically, the elastic element 7 is a fabric-reinforced oil seal spring, a key auxiliary component in the fabric-reinforced oil seal structure. It is typically a ring-shaped helical spring (also called a "clamping spring") installed inside the oil seal lip, continuously pressing the oil seal lip against the shaft surface with radial force to enhance sealing performance. Furthermore, the sealing ring 5 uses a fabric-reinforced oil seal, which uses a fabric layer (such as cotton or polyester) as its skeleton. This significantly improves the overall mechanical strength of the oil seal, resisting tearing forces caused by radial runout, vibration, or installation misalignment of the shaft. Compared to pure rubber oil seals, it is less prone to deformation and damage under high pressure or impact conditions, resulting in a longer service life.

[0030] like Figure 2 , 3 As shown: A relief groove 8 is provided at the contact point between the outer surface of the sealing ring 5 and the water-retaining ring 2. When the elastic element 7 compresses the sealing ring 5, the relief groove 8 can reduce the contact area between the middle part of the sealing ring 5 and the water-retaining ring 2, thereby preventing the sealing ring 5 from deforming due to excessive contact area when the water-retaining ring 2 rotates, and thus preventing water from flowing from the deformed part of the sealing ring 5 to the bearing.

[0031] like Figure 2 , 3 As shown: A pressure plate 9 is connected to the end of the water-sealing ring 3. The end of the pressure plate 9 near the sealing ring 5 abuts against the end of the sealing ring 5. Its function is to limit the sealing ring 5 and fix it in the placement groove 4, thereby achieving all-round limiting of the sealing ring 5 and preventing displacement or deformation of the sealing ring 5. The pressure plate 9 and the water-sealing ring 3 are detachably connected and fixed by bolts. This connection method facilitates the subsequent replacement of the elastic element 7 and the sealing ring 5.

[0032] like Figure 1 , 2 As shown in Figure 3: In addition, the outer surface of the sealing ring 3 is also provided with an annular sealing groove 10, and the sealing groove 10 is equipped with an annular sealing element 11. The outer surface of the sealing element 11 abuts against the inner surface of the support body 1. This structure can seal the outer surface of the sealing ring 3 and prevent water from entering the bearing from the connection between the sealing ring 3 and the support body 1.

[0033] Through the structural design and connection of the above components, a sealed defense is formed from multiple parts, preventing external water from entering the bearing inside the support body 1, effectively ensuring the normal working environment of the bearing and avoiding problems such as reduced lubrication effect due to water ingress.

[0034] Working principle: The support body 1 has a ring structure. The water-retaining ring 2 at its end near the inner surface is sealed to the rotating disk, initially protecting the internal bearing. The gap between the support body 1 and the water-retaining ring 2 is filled by the sealing ring 3. The sealing ring 3 has an L-shaped cross-section, and its corner edge forms an annular placement groove 4, which houses an annular sealing ring 5. The sealing ring 5 is a cloth-reinforced oil seal. Its outer surface abuts against the inner wall of the placement groove 4, and its inner surface is continuously compressed by the cloth-reinforced oil seal spring (elastic element 7) in the U-shaped groove, ensuring close contact with the outer surface of the water-retaining ring 2. The U-shaped groove is connected to the end opening of the sealing ring 5, and the radial force of the spring ensures a tight seal.

[0035] A clearance groove is provided at the contact area between the sealing ring and the water-retaining ring to reduce the contact area and prevent excessive deformation of the sealing ring during the rotation of the water-retaining ring, which could lead to water leakage. A removable pressure plate at the end of the water-sealing ring abuts against the end of the sealing ring, confining it within the placement groove to prevent displacement. A sealing element is installed in the annular sealing groove on the outer surface of the water-sealing ring, abutting against the inner surface of the support body to seal the connection gap between the water-sealing ring and the support body.

[0036] The multi-layered sealing structure works synergistically, using a water-sealing ring to fill gaps, a sealing ring and a water-blocking ring to fit elastically, a pressure plate to limit the position, and sealing components to assist in sealing. This effectively prevents high-pressure water from seeping into the gaps, protects the bearings from water ingress, and ensures lubrication and equipment lifespan.

[0037] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A socket sealing device, comprising a support body (1), the support body (1) having an annular structure, a water-retaining ring (2) being provided at one end of the support body (1) near the inner surface of the support body (1), a water-sealing ring (3) abutting the outer surface of the water-retaining ring (2), the water-sealing ring (3) being connected to the support body (1), characterized in that: The cross-section of the water sealing ring (3) is L-shaped, and a placement groove (4) is formed between the corners of adjacent water sealing rings (3). The placement groove (4) is located on the side close to the water blocking ring (2), and the placement groove (4) has a ring structure. The sealing ring (5) is an annular structure. The sealing ring (5) is located in the placement groove (4). The outer surface of the sealing ring (5) abuts against the inner side wall of the placement groove (4). The inner surface of the sealing ring (5) always abuts against the outer surface of the water-blocking ring (2).

2. The socket sealing device as described in claim 1, characterized in that: The sealing ring (5) has an open end and a U-shaped groove arranged in an annular shape inside. The U-shaped groove is connected to the open end. The U-shaped groove has a clamping elastic element (7), which has a ring structure and is used to squeeze the cloth-clamped oil seal toward the water-blocking ring (2).

3. The socket sealing device as described in claim 2, characterized in that: The elastic element (7) is a fabric-reinforced oil seal spring.

4. The socket sealing device as described in claim 1, characterized in that: The outer surface of the sealing ring (5) has a relief groove (8) at the contact point with the water-blocking ring (2).

5. The socket sealing device as described in claim 1, characterized in that: The sealing ring (3) is connected to a pressure plate (9) at one end, and the end of the pressure plate (9) near the sealing ring (5) abuts against the end of the sealing cavity.

6. The socket sealing device as described in claim 5, characterized in that: The sealing ring (5) is a fabric-reinforced oil seal.

7. The socket sealing device as described in claim 6, characterized in that: The outer surface of the sealing ring (3) has a sealing groove (10), the sealing groove (10) is annular, and the sealing groove (10) has a sealing element (11) inside, the sealing element (11) is annular, and the outer surface of the sealing element (11) abuts against the inner surface of the support (1).

8. The socket sealing device as described in claim 5, characterized in that: The pressure plate (9) and the water sealing ring (3) are detachably connected.

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