Gate valve sliding bearing

Abstract

The utility model provides a gate valve sliding bearing, including the bearing body of cylindrical, two sealing grooves are arranged respectively in bearing body both ends, the inner wall of bearing body is around the layout of sealing groove, sets up the chip groove in bearing body inside. The utility model discloses through the improvement of above -mentioned structure, makes the sealing piece interference fit between the bearing and the axle, to carry out sealing cooperation between the bearing and the axle, further prevents rainwater from immersing between the bearing and the axle, to reduce the rust of bearing and axle as far as possible, when the oxide particle of rust or the impurity particle of appearing between the axle and the bearing, through setting up the chip groove on the bearing body, when the axle rotates relative to the bearing, oxide particle or impurity particle moves between the lamination of axle and bearing, until enters the chip groove, further prevents oxide particle or impurity particle from continuing to move between the axle and the bearing and causes the bearing contact surface wear and tear, prevents the bearing body wear and tear, is favorable for prolonging the service life of gate valve sliding bearing.

Description

Technical Field

[0001] This utility model relates to the field of sliding bearing technology, and specifically to a sliding bearing for gate valves. Background Technology

[0002] The top pivot is the upper support device of the miter gate. It is an important structure that ensures the gate body can rotate freely around the rotation center, similar to the hinge of a door in daily life. It works together with the bottom pivot to complete the operation of the miter gate.

[0003] The top pivot assembly is connected to the miter gate via a top pivot shaft. To ensure the smooth opening and closing of the miter gate, a sliding bearing, known as the top pivot bearing, is used between the top pivot shaft and the top pivot frame. Traditionally, sliding bearings for gate valves typically use steel bushings, lubricated by oil injection to achieve free and smooth rotation of the miter gate. This method involves a large workload for operation and maintenance and is not very effective. In recent years, self-lubricating bearings have become the norm for sliding bearings in large ship locks in China. These bearings contain solid lubricant, which is released through continuous friction during the operation of the miter gate, achieving self-lubrication. This method significantly reduces the workload for operation and maintenance of the miter gate and shows a marked improvement in performance. However, recent inspections and disassemblies of large ship lock miter gates have revealed that the top pivot of the miter gate is constantly exposed to a moisture-filled environment. Over time, a certain amount of wear debris inevitably accumulates on the inner wall of the top pivot bearing. This wear debris further exacerbates bearing wear, thus reducing the bearing's service life.

[0004] In summary, there is an urgent need for a sliding bearing for gate valves to solve or at least partially solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this utility model is to provide a sliding bearing for gate valves, aiming to solve the problem that existing bearings are prone to generating wear debris due to moisture during use, which leads to accelerated wear and reduced service life. The specific technical solution is as follows: A gate valve sliding bearing includes a cylindrical bearing body, two sealing grooves at both ends of the bearing body, the sealing grooves being arranged around the inner wall of the bearing body, and a chip removal groove being provided inside the bearing body.

[0006] Furthermore, the chip removal groove includes a chip scraper groove and a chip accumulation groove. The chip accumulation groove is arranged radially around the inner wall of the bearing body, and the chip scraper groove is arranged axially along the bearing body. The chip scraper groove and the chip accumulation groove are arranged intersectingly.

[0007] Furthermore, the chip buildup groove is located near the lower end of the bearing body.

[0008] Furthermore, the scraper groove is one of a rectangular groove, a semi-circular groove, or a dovetail groove.

[0009] Furthermore, it also includes a lubricant and a self-lubricating layer. A receiving groove is provided inside the bearing body, and the receiving groove is staggered with the chip removal groove. The lubricant is embedded in the receiving groove. The self-lubricating layer is arranged on the inner wall surface of the bearing body.

[0010] Furthermore, the lubricant is made of graphite or PTFE; the bearing body is typically cast from bronze or brass alloys.

[0011] Furthermore, a retaining sill is provided on the bearing body. The retaining sill is located on the outer side of the sealing groove away from the chip removal groove, and the inner diameter of the retaining sill is larger than the inner diameter of the bearing body.

[0012] Furthermore, a guide surface is provided on the bearing body, and the guide surface is arranged on the side of the sealing groove away from the retaining sill.

[0013] Furthermore, the bearing body is provided with an air pumping port and a chip removal port. The air pumping port is located on the top of the bearing body, with its first end extending from the top of the bearing body and its second end communicating with the chip scraper groove. The chip removal port is located on the bottom of the bearing body, with its first end communicating with the chip scraper groove and its second end extending from the bottom of the bearing body. The bearing body also includes two rubber plugs, one of which is detachably inserted into the air pumping port from the top of the bearing body, and the other rubber plug is detachably inserted into the chip removal port from the bottom of the bearing body.

[0014] The application of the technical solution of this utility model has the following beneficial effects: The main problem with rust is the ingress of rainwater and the inability of abrasive particles to be discharged in time, which causes abrasive wear and reduces the service life of the bearing. Through the aforementioned structural improvements, in practical use, the bearing is installed on the top pivot of the herringbone gate, and seals are installed at both ends of the bearing. The shaft passes through the bearing, with the seals interfering with the bearing and shaft to create a sealing fit. This prevents rainwater from entering between the bearing and shaft, thus minimizing corrosion. Simultaneously, when rust oxide particles or impurities appear between the shaft and bearing, the chip removal grooves on the bearing body allow these particles to move between the shaft and bearing contact surfaces as the shaft rotates relative to the bearing, eventually entering the chip removal grooves. This prevents further wear on the bearing contact surfaces caused by the particles moving between the shaft and bearing, thus preventing wear on the bearing body. Furthermore, the chip removal grooves promptly discharge oxide particles from the shaft-bearing contact surface and store them, reducing abrasive wear on the bearing and increasing the service life of the gate valve's sliding bearing.

[0015] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an embodiment of a sliding bearing for a gate valve according to this utility model; Figure 2 This is a schematic diagram of the internal structure of an embodiment of a sliding bearing for a gate valve according to this utility model; Figure 3 yes Figure 2 Enlarged view at point A in the middle; Figure 4 yes Figure 2 Enlarged view at point B; Figure 5 This is a schematic diagram of the internal structure of another embodiment of the sliding bearing for a gate valve according to this utility model; Figure 6 yes Figure 5 A magnified view of point C in the middle.

[0017] Among them, 1. Bearing body; 11. Sealing groove; 12. Chip removal groove; 121. Scraper groove; 122. Chip accumulation groove; 13. Receiving groove; 14. Retaining sill; 15. Guide surface; 16. Pump air hole; 17. Chip removal hole; 2. Lubricating body; 3. Self-lubricating layer; 4. Rubber plug. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be provided below, along with preferred embodiments. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this utility model.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0020] Example: See Figures 1-6This embodiment provides a gate valve sliding bearing, including a cylindrical bearing body 1, with two sealing grooves 11 respectively provided at both ends of the bearing body 1. The sealing grooves 11 are arranged around the inner wall of the bearing body 1, and a chip removal groove 12 is provided inside the bearing body 1.

[0021] It should be noted that the sliding bearing of this gate valve (hereinafter referred to as the bearing) is generally installed on the miter gate of the lock. The lock is located beside the waterway, where the air humidity is high. The top pivot of the miter gate acts as a hinge, and the miter gate needs to be in an outward cantilevered state, bearing a large torque, heavy load, and low speed operation. In addition, the top pivot of the lock is often exposed to sun and rain. In actual use, rainwater can easily corrode into the bearing, leading to rust. The oxide particles produced by corrosion interact with the miter gate shaft (hereinafter referred to as the shaft) during the rotation of the bearing, causing oxide particles to fall off the bearing surface or the shaft surface, resulting in friction between the shaft and the bearing. Since the oxide particles have nowhere to escape, abrasive wear occurs between the shaft and the bearing, accelerating the wear rate between the shaft and the bearing and shortening the service life of the bearing.

[0022] Research has revealed that the main problem with rust is the ingress of rainwater and the inability of abrasive particles to be discharged in time, which causes abrasive wear and reduces the service life of the bearing. Through the aforementioned structural improvements, in practical use, the bearing is mounted on the top pivot of the herringbone gate, and seals are installed at both ends of the bearing. The shaft passes through the bearing, with the seals interfering with the bearing and shaft to create a sealing fit. This prevents rainwater from entering between the bearing and shaft, thus minimizing corrosion. Simultaneously, when rust oxide particles or impurities appear between the shaft and bearing, the chip removal groove 12 on the bearing body 1 allows these particles to move between the shaft and bearing contact surfaces as the shaft rotates relative to the bearing, eventually entering the chip removal groove 12. This prevents further wear on the bearing contact surface caused by the particles moving between the shaft and bearing, thus preventing wear on the bearing body 1. Furthermore, the chip removal groove 12 promptly discharges oxide particles from the shaft-bearing contact surface and stores them, reducing abrasive wear on the bearing and increasing the service life of the gate valve's sliding bearing. Specifically, the seal is a lip seal.

[0023] Furthermore, the chip removal groove 12 includes a chip scraping groove and a chip accumulation groove. The chip accumulation groove is arranged radially around the inner wall of the bearing body 1, and the chip scraping groove is arranged axially along the bearing body 1. The chip scraping groove and the chip accumulation groove are arranged intersectingly.

[0024] It is known that when the shaft rotates relative to the bearing body 1, the oxide particles and impurity particles between the shaft and the bearing body 1 will first enter the scraper groove due to the rotation. The scraper groove collects the discharged oxide particles and impurity particles. The scraper groove is connected to the chip accumulation groove. Some oxide particles and impurity particles are guided downward into the chip accumulation groove for storage through the scraper groove.

[0025] It should be noted that multiple scraper grooves are arranged, with these grooves evenly spaced circumferentially along the inner wall of the bearing body 1. By arranging multiple scraper grooves at equal intervals circumferentially, oxide particles or impurities only need to travel a small distance to reach the scraper grooves for collection. This shortens the distance that oxide particles or impurities travel between the shaft and the inner surface of the bearing body 1, which helps to reduce the wear rate of the bearing body 1 and improve its service life.

[0026] Furthermore, the chip accumulation groove is arranged near the lower end of the bearing body 1.

[0027] It is known that when oxide particles and impurity particles move between the shaft and the bearing body 1, they will move downwards and fall off under the influence of gravity. By arranging the chip accumulation groove at the lower end of the bearing body 1, it is beneficial to allow more oxide particles and impurity particles to enter the chip accumulation groove for storage. A typical application scenario is the top pivot of a V-gate, in which the bearing is arranged vertically. Of course, the above structure can also be applied in other technical fields.

[0028] It should be noted that in some other embodiments of this application, the chip accumulation groove is arranged in the middle of the bearing body 1, and the scraping groove is arranged horizontally. This structure is mainly used when the bearing is arranged horizontally, placing the chip accumulation groove in the middle of the bearing body 1 to make it easier for oxide particles and impurity particles to enter the chip accumulation groove. Its typical application scenario is the guide (support) roller bearing in the gate valve of water transport (water conservancy and hydropower) engineering, which is usually arranged horizontally. Of course, the above structure can also be applied in other technical fields.

[0029] Furthermore, the scraper groove is one of a rectangular groove, a semi-circular groove, or a dovetail groove.

[0030] Through testing, rectangular grooves, semi-circular grooves, and dovetail grooves were found to facilitate the entry of oxide particles between the shaft and the inner surface of the bearing body 1 into the scraper groove for storage. Simultaneously, oxide particles and impurities are less likely to re-enter between the shaft and bearing body 1, thus reducing abrasive wear. It should be noted that dovetail grooves are more advantageous for storing oxide and impurity particles, but their manufacturing process is relatively more complex. Rectangular grooves are relatively easier to manufacture, but their ability to prevent oxide and impurity particles from re-entering between the shaft and bearing body 1 is slightly weaker. The appropriate groove should be selected based on specific circumstances during actual use.

[0031] Furthermore, it also includes a lubricant 2, and a receiving groove 13 is provided inside the bearing body 1. The receiving groove 13 is staggered with the chip removal groove 12. The lubricant 2 is embedded in the receiving groove 13, and the top surface of the lubricant 2 is flush with the inner wall of the bearing body 1. Specifically, the lubricant 2 is made of graphite or PTFE material; the bearing body 1 is cast from bronze alloy or brass alloy.

[0032] It is known that by embedding a lubricant 2 inside the bearing body 1, lubricant is delivered between the shaft and the bearing body 1 through the lubricant, thereby reducing the friction factor between the shaft and the bearing body 1, thereby reducing the friction force between the shaft and the bearing body 1, thereby reducing the wear between the shaft and the bearing body 1, and further improving the service life of the bearing.

[0033] Furthermore, it also includes a self-lubricating layer 3, which is disposed on the inner wall surface of the bearing body 1.

[0034] It is known that the self-lubricating layer 3 is a ceramic layer, which is fixedly connected to the inner surface of the bearing body 1 by sintering. Through the arrangement of the self-lubricating layer 3, the friction factor between the bearing body 1 and the shaft is further reduced, the friction force between the bearing body 1 and the shaft is reduced, the wear of the bearing body 1 is reduced, and the service life of the bearing is improved.

[0035] Furthermore, a retaining sill 14 is provided on the bearing body 1. The retaining sill 14 is arranged on the outer side of the sealing groove 11 away from the chip removal groove 12, and the inner diameter of the retaining sill 14 is larger than the inner diameter of the bearing body 1.

[0036] It should be noted that the setting of the retaining sill 14 limits the sealing element installed in the sealing groove 11, preventing the sealing element from falling off or shifting from the sealing groove 11 during use, thereby preventing water from entering between the shaft and bearing due to the sealing element falling off or shifting.

[0037] Preferably, a guide surface 15 is provided on the bearing body 1, and the guide surface 15 is arranged on the side of the sealing groove 11 away from the retaining sill 14.

[0038] It can be seen that by setting the guide surface 15, the seal is guided by the guide surface 15 during the installation of the seal, making it easier for the seal to enter the sealing groove 11, which is beneficial to the installation of the seal.

[0039] Furthermore, a pumping air hole 16 and a chip removal hole 17 are also provided. The pumping air hole 16 is arranged on the top of the bearing body 1, and the first end of the pumping air hole 16 extends out from the top of the bearing body 1, while the second end of the pumping air hole 16 communicates with the chip scraper groove. The chip removal hole 17 is arranged on the bottom of the bearing body 1, and the first end of the chip removal hole 17 communicates with the chip scraper groove, while the second end of the chip removal hole 17 extends out from the bottom of the bearing body 1. It also includes a rubber plug 4, two rubber plugs 4 are arranged, one rubber plug 4 is detachably inserted into the pumping air hole 16 from the top of the bearing body 1, and the other rubber plug 4 is detachably inserted into the chip removal hole 17 from the bottom of the bearing body 1.

[0040] It should be noted that over time, more and more oxide particles and impurities will accumulate in the chip removal groove 12. If these oxide particles and impurities are not cleaned, the accumulated oxide particles and impurities can still easily lead to accelerated wear of the brake shoe body. However, if the oxide particles and impurities can be cleaned in a timely manner, the impact of oxide particles and impurities on the bearing can be further reduced.

[0041] By periodically removing the two rubber plugs 4, and using an air gun to blow air into the air hole at the top, the gas, oxide particles and impurity particles are discharged from the chip discharge hole 17, thereby achieving timely cleaning of oxide particles and impurity particles.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sliding bearing for a gate valve, characterized in that: The bearing body (1) is cylindrical. Two sealing grooves (11) are provided at both ends of the bearing body (1). The sealing grooves (11) are arranged around the inner wall of the bearing body (1). A chip removal groove (12) is provided inside the bearing body (1). The chip removal groove (12) includes a chip scraping groove (121) and a chip accumulation groove (122). The chip accumulation groove (122) is arranged radially around the inner wall of the bearing body (1), and the chip scraping groove (121) is arranged axially along the bearing body (1). The chip scraping groove (121) and the chip accumulation groove (122) are arranged intersectingly.

2. The sliding bearing for a gate valve according to claim 1, characterized in that: The chip accumulation groove (122) is arranged near the lower end of the bearing body (1).

3. A gate valve sliding bearing according to claim 1, characterized in that: The scraper groove (121) is either a rectangular groove or a dovetail groove.

4. A sliding bearing for a gate valve according to claim 1, characterized in that: It also includes a lubricant (2) and a self-lubricating layer (3). A receiving groove (13) is provided in the bearing body (1). The receiving groove (13) is staggered with the chip removal groove (12). The lubricant (2) is embedded in the receiving groove (13). The self-lubricating layer (3) is arranged on the inner wall surface of the bearing body (1).

5. A gate valve sliding bearing according to claim 4, characterized in that: The lubricant (2) is made of graphite or PTFE material; The bearing body (1) is made of bronze alloy or brass alloy.

6. A gate valve sliding bearing according to any one of claims 1-5, characterized in that: A retaining sill (14) is provided on the bearing body (1). The retaining sill (14) is arranged on the outer side of the sealing groove (11) away from the chip removal groove (12), and the inner wall diameter of the retaining sill (14) is larger than the inner wall diameter of the bearing body (1).

7. A gate valve sliding bearing according to claim 6, characterized in that: The bearing body (1) is provided with a guide surface (15), which is arranged on the side of the sealing groove (11) away from the retaining wall (14).

8. A gate valve sliding bearing according to any one of claims 1-5, characterized in that: It is also provided with a pumping air hole (16) and a chip removal hole (17). The pumping air hole (16) is arranged on the top of the bearing body (1), and the first end of the pumping air hole (16) is led out from the top of the bearing body (1). The second end of the pumping air hole (16) is connected to the chip removal groove (121). The chip removal hole (17) is arranged at the bottom of the bearing body (1), and the first end of the chip removal hole (17) is connected to the chip scraper groove (121), and the second end of the chip removal hole (17) is led out from the bottom of the bearing body (1).

9. A sliding bearing for a gate valve according to claim 8, characterized in that: It also includes two rubber plugs (4), one of which is detachably inserted into the air pump hole (16) from the top of the bearing body (1); the other rubber plug (4) is detachably inserted into the chip discharge hole (17) from the bottom of the bearing body (1).

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