Highly wear-resistant rubber seal for water gate

Abstract

The utility model relates to sealing technical field, and disclose a kind of high wear-resistant sluice rubber sealing element, including rubber sealing element base body, and the rubber sealing element base body is Ω type cross section structure.The high wear-resistant sluice rubber sealing element, by setting V type flow guide groove with the drainage micropore of center through-hole side wall on the outside of base body form cooperative drainage system, can efficiently respond to water flow impact and reduce leakage, V type flow guide groove opening is outside, end is located in the inside of base body, its upslope and downslope can be shunted to two sides to the water flow of vertical impact, avoid water flow concentrated impact sealing lip edge root, water flow guided by slope is mostly splashed and diffused to two sides along groove, weaken penetration kinetic energy to reduce direct scouring, and a small amount of water flow that seeps into groove then flows along groove body to end, is discharged to the inside of base body by the structure that is communicated with drainage micropore, prevent forming high pressure vortex, this kind of'shunting-flow guide-drainage' mechanism, both reduce impact damage, and guarantee sealing stability.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, specifically a high wear-resistant rubber seal for sluice gates. Background Technology

[0002] Sluice gates play an important role in water conservancy projects, such as regulating water level and controlling water flow. The performance of their rubber seals directly affects the operation and service life of the sluice gate. In practical applications, sluice gates need to be opened and closed frequently. During this process, there is continuous friction between the gate and the seals, and the water flow also has a strong scouring effect on the seals.

[0003] The existing patent document CN214783717U discloses a sluice gate rubber seal with good aging resistance. This utility model has a through hole inside the circular head and a first through hole inside the connecting block at the tail. The seal can deform when it is compressed, making the head and tail more elastic and soft. It can be used in sluice gate gaps with more flexibility. An arc-shaped connecting block is fixedly connected between the circular head and the connecting block. The arc-shaped connecting block is inclined at 30°-45°. When the water pressure impacts the seal, it can bend the head and stick it tightly to the gate wall, thus playing a stabilizing role and preventing it from falling off due to erosion.

[0004] However, existing high-wear-resistant sluice gate rubber seals are not convenient for directional diversion and efficient drainage of water flow. Although existing rubber seals enhance deformation capacity through through holes and the arc-shaped connecting block can also help the head bend and fit against the gate wall to improve stability, they do not have V-shaped flow guiding grooves. They cannot use the upper and lower slopes to divert the vertically impacting water flow to both sides, which makes the water flow easily concentrate and impact the root of the sealing lip. In addition, the lack of a groove and drainage micro-hole connection structure makes it difficult to guide the seeping water flow out. High-pressure eddies are easily formed in the sealing gap, which not only aggravates scouring damage but also affects the sealing stability. Utility Model Content

[0005] (a) Technical problems to be solved The purpose of this utility model is to provide a high wear-resistant sluice gate rubber seal to solve the problem mentioned in the background art that the existing high wear-resistant sluice gate rubber seals are not convenient for directional diversion and efficient drainage of water flow.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a high wear-resistant sluice gate rubber seal, comprising a rubber seal substrate, wherein the rubber seal substrate has an Ω-shaped cross-section structure, and symmetrically distributed sealing lips extend from one side of the rubber seal substrate. The root of the sealing lips adopts an arc transition. A central through hole is provided through the rubber seal substrate. V-shaped flow guiding grooves are distributed at intervals along the length direction on the outer side of the rubber seal substrate. Drainage micro-holes are symmetrically arranged on the sidewall of the central through hole, and the drainage micro-holes are connected to the through holes opened at the ends of the V-shaped flow guiding grooves.

[0007] As a further improvement to the above solution, the rubber seal substrate is molded from a blend of EPDM rubber and nitrile rubber. The outer friction surface of the rubber seal substrate and the sealing lip is covered with a composite wear-resistant layer. The blending of the two rubber materials combines the aging resistance and water resistance of EPDM rubber with the oil resistance and high elasticity of nitrile rubber. The molding process ensures the integrity of the structure, and the composite wear-resistant layer covering the outer friction surface can specifically enhance the wear resistance of the contact area with the gate, avoiding direct friction damage to the substrate.

[0008] As a further improvement to the above solution, the composite wear-resistant layer is composed of a bottom polyurethane elastomer and a surface alumina ceramic particles. It is connected to the rubber seal matrix through a vulcanization process. The bottom polyurethane elastomer has good compatibility with the base rubber and forms a strong bond after vulcanization, which can buffer frictional impact. The surface alumina ceramic particles have high hardness and can directly resist water erosion and mud and sand wear. The double-layer structure not only ensures wear resistance but also avoids damage to the sealing surface caused by hard contact, thus extending the service life of the seal.

[0009] As a further improvement to the above solution, a honeycomb-shaped buffer cavity is coaxially arranged inside the rubber seal substrate. The honeycomb structure disperses pressure through multiple cavities, improves the overall elastic deformation capability of the substrate, can adapt to minor unevenness or installation errors of the sealing surface, and ensures that the lip always fits tightly. At the same time, the cavity structure reduces the weight of the substrate, reduces the amount of material used, and does not affect the overall structural strength.

[0010] As a further improvement to the above solution, a skeleton receiving cavity is provided inside the rubber seal substrate, between the honeycomb buffer cavity and the central through hole. The skeleton receiving cavity provides a precise installation space for the annular spring steel skeleton, preventing the skeleton from shifting during the deformation of the substrate and ensuring that the skeleton and the substrate work together. At the same time, the cavity wall forms a protective enclosure for the skeleton, reducing direct contact between the skeleton and water flow and impurities, and reducing the risk of corrosion.

[0011] As a further improvement to the above solution, the skeleton accommodating cavity is embedded with an annular spring steel skeleton. The annular spring steel skeleton enhances the structural rigidity of the substrate, prevents the seal from undergoing excessive deformation or warping under high water pressure, and ensures the stability of the lip fit. The annular design of the skeleton adapts to the overall contour of the substrate and does not affect the bending adaptability of the seal along the length direction, which can meet the installation requirements of complex working conditions such as arc gates.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This high wear-resistant sluice gate rubber seal, by setting a V-shaped flow guiding groove on the outside of the base and forming a synergistic drainage system with the drainage micropores on the side wall of the central through hole, can effectively cope with water flow impact and reduce leakage. The V-shaped flow guiding groove opens outward and ends inside the base. Its upper and lower slopes can divert the vertically impacting water flow to both sides, avoiding water flow concentrating on the root of the sealing lip. Most of the water flow guided by the slope is splashed and diffused to both sides along the groove, weakening the penetration kinetic energy to reduce direct scouring. The small amount of water that seeps into the groove flows towards the end of the groove and is discharged to the inside of the base through the structure connected to the drainage micropores, preventing the formation of high-pressure eddies. This "diversion-guidance-drainage" mechanism reduces impact damage and ensures sealing stability. 2. This high wear-resistant sluice gate rubber seal significantly improves wear resistance and erosion resistance by setting a composite wear-resistant layer on the outer friction surface of the rubber seal substrate and the sealing lip. The composite wear-resistant layer adopts a composite structure of polyurethane elastomer at the bottom layer and alumina ceramic particles at the surface layer. It is firmly bonded to the substrate through a vulcanization process. It reduces friction damage by using the elastic buffer of polyurethane and resists the erosion of mud and sand carried by water flow by relying on the high hardness of ceramic particles. This double-layer protection design extends the wear life of the seal by several times compared with traditional rubber seals. It is especially suitable for water environments with high sand content and greatly reduces the maintenance cost of frequent replacement. 3. This high wear-resistant sluice gate rubber seal achieves a balance between elasticity and strength through the combination design of an internal honeycomb buffer cavity and an annular spring steel skeleton. The honeycomb buffer cavity gives the seal good deformation compensation ability and can adapt to the slight unevenness of the sealing surface. The annular spring steel skeleton located between the buffer cavity and the central through hole enhances the structural rigidity and ensures that excessive deformation does not occur under high water pressure. This "flexible yet rigid" structure allows the seal to not only fit tightly against the gate surface to form an effective seal, but also resist fatigue damage caused by long-term compression, making it suitable for various working conditions such as planar and curved gates. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the V-shaped flow guide groove of this utility model; Figure 3This is a schematic diagram of the cross-sectional structure of the rubber sealing component substrate of this utility model; Figure 4 This is a magnified schematic diagram showing a partial detail of the honeycomb-shaped buffer cavity of this utility model.

[0014] In the figure: 1. Rubber seal substrate; 2. Sealing lip; 3. Central through hole; 4. V-shaped flow guide groove; 5. Drainage micropores; 6. Composite wear-resistant layer; 7. Honeycomb buffer cavity; 8. Skeleton receiving cavity; 9. Annular spring steel skeleton. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a high wear-resistant sluice gate rubber seal, including a rubber seal base 1, the rubber seal base 1 having an Ω-shaped cross-section structure, symmetrically distributed sealing lips 2 extending from one side of the rubber seal base 1, the root of the sealing lips 2 adopting an arc transition, a central through hole 3 penetrating inside the rubber seal base 1, V-shaped flow guiding grooves 4 spaced along the length direction on the outer side of the rubber seal base 1, and drainage microholes 5 symmetrically arranged on the sidewall of the central through hole 3, the drainage microholes 5 communicating with the through holes opened at the end of the V-shaped flow guiding grooves 4.

[0017] During the sluice gate closure process, as the gate plate gradually approaches the sealing seat, the Ω-shaped cross-section structure of the rubber sealing component matrix 1 first contacts and is compressed against the gate plate. Its arc-shaped body stores deformation potential energy through elastic contraction. The symmetrical sealing lips 2 on both sides, with the flexible characteristics of the rounded transition at the root, bend and fit towards the sealing surface like tentacles, forming the first tight sealing defense. Even if there are minor scratches or protrusions on the sealing surface, the lips can achieve a wrapping fit through their own deformation. Under the impact of water flow, the V-shaped guide grooves 4 distributed at intervals along the length direction on the outer side immediately play their role, with the groove openings facing towards... The direction of water flow, with its upward and downward slopes forming a natural diversion ramp, decomposes the vertically impacting water flow into two lateral flows, one upward and one downward. This disperses the kinetic energy that was originally concentrated on the root of the lip. Most of the diverted water flows outward along the groove ramp, away from the sealing gap. The small amount of water that seeps into the groove flows along the bottom of the groove towards the end, precisely connecting with the drainage micro-hole 5 on the side wall of the central through-hole 3 through the through-hole at the end of the groove, and finally being discharged through the central through-hole 3. This completely avoids the accumulation of water between the sealing surface and the substrate, forming a high-pressure vortex, and reduces the continuous scouring of the lip by the vortex from the source.

[0018] The rubber seal substrate 1 is molded from a blend of EPDM rubber and nitrile rubber. The outer friction surfaces of the rubber seal substrate 1 and the sealing lip 2 are covered with a composite wear-resistant layer 6. The composite wear-resistant layer 6 is composed of a bottom layer of polyurethane elastomer and a surface layer of alumina ceramic particles. It is connected to the rubber seal substrate 1 through a vulcanization process. A honeycomb buffer cavity 7 is coaxially arranged inside the rubber seal substrate 1. Inside the rubber seal substrate 1, a skeleton receiving cavity 8 is arranged between the honeycomb buffer cavity 7 and the central through hole 3. A ring spring steel skeleton 9 is embedded in the skeleton receiving cavity 8.

[0019] The rubber seal matrix 1 uses a blend of EPDM and nitrile rubber, which retains the excellent weather resistance and water stability of EPDM while incorporating the high elasticity and resistance to compression set of nitrile rubber. Combined with the internally coaxially arranged honeycomb buffer chamber 7, the synchronous contraction and expansion of countless tiny chambers under pressure further amplifies the deformation compensation range, ensuring that the sealing lip 2 always maintains a tight fit against the sealing surface that may have slightly deformed due to long-term use. The composite wear-resistant layer 6 covering the outer friction surface provides double protection. The bottom layer of polyurethane elastomer and the matrix rubber are bonded at the molecular level through a vulcanization process, absorbing vibration and impact like an elastic pad when the lip rubs against the gate. The surface layer contains embedded alumina ceramic particles with extremely high hardness. The high-pressure, high-strength structure directly contacts the mud, sand, and impurities in the water flow. Its wear resistance blocks the wear path, significantly extending the service life of the friction surface. At the same time, the skeleton accommodating cavity 8, located between the honeycomb buffer cavity 7 and the central through hole 3, provides precise installation positioning for the annular spring steel skeleton 9. The skeleton's rigidity offsets the expansion force under high water pressure, preventing excessive deformation or warping of the substrate. The annular design of the skeleton does not hinder the bending of the seal along its length, allowing it to adapt to the curved contour of the arc gate. This flexible-rigid synergistic structure of "honeycomb cavity flexible compensation + spring steel skeleton rigid support" ensures that the seal will not lose its sealing shape due to excessive softness or lose its fit and adaptability due to excessive hardness when subjected to water pressure, ultimately achieving a long-term and efficient water-stopping effect.

[0020] Working principle: During the sluice gate closure process, as the gate plate gradually approaches the sealing seat, the Ω-shaped cross-section structure of the rubber sealing component matrix 1 first contacts and is compressed against the gate plate. Its arc-shaped body stores deformation potential energy through elastic contraction. The symmetrical sealing lips 2 on both sides, with the flexible characteristics of the rounded transition at the root, bend and fit towards the sealing surface like tentacles, forming the first tight sealing defense line. Even if there are minor scratches or protrusions on the sealing surface, the lips can achieve a wrapping fit through their own deformation. Under the condition of water flow impact, the V-shaped flow guiding grooves 4 distributed at intervals along the length direction on the outer side immediately play their role. The groove openings face the direction of water flow, and the upper and lower slopes form a natural diversion slope, which diverts the vertical impact. The water flow is split into two lateral flows, one upward and one downward, which disperses the kinetic energy that would otherwise be concentrated at the root of the lip. Most of the diverted water is splashed and diffused outward along the slope of the groove, away from the sealing gap. The small amount of water that seeps into the groove flows towards the end along the bottom of the groove and precisely connects with the drainage micro-hole 5 on the side wall of the central through-hole 3 through the through-hole at the end of the groove, and is finally discharged through the central through-hole 3. This completely avoids the accumulation of water between the sealing surface and the substrate, forming a high-pressure eddy, and reduces the continuous scouring of the lip by the eddy from the source. The rubber seal substrate 1 uses a blend of EPDM rubber and nitrile rubber, which retains the excellent weather resistance and water stability of EPDM rubber. It also incorporates the high elasticity and compression set resistance of nitrile rubber, along with the internally coaxial honeycomb buffer cavity 7. Under pressure, the synchronous contraction and expansion of countless tiny cavities further amplifies the deformation compensation range, ensuring that the sealing lip 2 always tightly adheres to the sealing surface that may have slightly deformed due to long-term use. The composite wear-resistant layer 6 covering the outer friction surface provides double protection. The bottom layer of polyurethane elastomer and the base rubber are bonded at the molecular level through a vulcanization process. When the lip rubs against the gate, it acts like an elastic pad to absorb vibration and impact. The surface layer contains highly hard alumina ceramic particles that come into direct contact with silt and impurities in the water flow, blocking wear through their wear resistance. The path significantly extends the service life of the friction surface. At the same time, the skeleton receiving cavity 8 located between the honeycomb buffer cavity 7 and the central through hole 3 provides precise installation positioning for the annular spring steel skeleton 9. The skeleton, with its own rigidity, offsets the expansion force under high water pressure, preventing excessive deformation or warping of the substrate. The annular design of the skeleton does not hinder the bending of the seal along its length, allowing it to adapt to the curved contour of the arc gate. This flexible and rigid structure of "honeycomb cavity flexible compensation + spring steel skeleton rigid support" ensures that the seal will not lose its sealing shape due to being too soft or lose its fit and adaptability due to being too hard when subjected to water pressure, ultimately achieving a long-term and efficient water-stopping effect. Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A high wear-resistant sluice gate rubber seal, comprising a rubber seal substrate (1), characterized in that: The rubber seal substrate (1) has an Ω-shaped cross-section structure. A symmetrically distributed sealing lip (2) extends from one side of the rubber seal substrate (1). The root of the sealing lip (2) is rounded. A central through hole (3) is provided inside the rubber seal substrate (1). V-shaped flow guide grooves (4) are distributed at intervals along the length direction on the outer side of the rubber seal substrate (1). Drainage microholes (5) are symmetrically arranged on the side wall of the central through hole (3). The drainage microholes (5) are connected to the through holes opened at the end of the V-shaped flow guide grooves (4).

2. The high wear-resistant rubber seal for a sluice gate according to claim 1, characterized in that: The rubber seal substrate (1) is molded from a blend of EPDM rubber and nitrile rubber. The outer friction surfaces of the rubber seal substrate (1) and the sealing lip (2) are covered with a composite wear-resistant layer (6).

3. The high wear-resistant rubber seal for a sluice gate according to claim 2, characterized in that: The composite wear-resistant layer (6) is composed of a bottom layer of polyurethane elastomer and a surface layer of alumina ceramic particles, and is connected to the rubber seal substrate (1) through a vulcanization process.

4. The high wear-resistant rubber seal for a sluice gate according to claim 1, characterized in that: The rubber seal substrate (1) has a honeycomb-shaped buffer cavity (7) coaxially arranged inside.

5. The high wear-resistant rubber seal for a sluice gate according to claim 4, characterized in that: Inside the rubber seal substrate (1), a skeleton receiving cavity (8) is provided between the honeycomb buffer cavity (7) and the central through hole (3).

6. The high wear-resistant rubber seal for a sluice gate according to claim 5, characterized in that: The skeleton accommodating cavity (8) is fitted with an annular spring steel skeleton (9).

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