Improved durable gate valve

Abstract

The utility model relates to the technical field of gate valves, in particular to an improved durable gate valve which comprises a valve body, a liquid inlet cavity and a liquid outlet cavity which penetrate through the valve body and are communicated with each other, a cavity is formed in the center of the top of the valve body, a valve cover is arranged on the top of the valve body, a valve element is arranged in the cavity in a sliding mode, and a fixing rod is fixedly connected to the center of the top of the valve element. Cleaning parts used for cleaning the outer wall of the valve element are arranged in the valve body and close to the two sides of the cavity and comprise fixing plates, bristles and springs, the automatic cleaning function on the outer wall of the valve element is achieved, dirt and attachments can be effectively removed through close contact of the bristles and the side wall of the valve element, the sealing performance and smooth movement of the valve element are guaranteed, and the service life of the valve element is prolonged. And an inserting groove is formed in the portion, located below the connecting position of the liquid inlet cavity and the liquid outlet cavity, of the valve body, a limiting block is fixedly arranged at the center of the inserting groove, and when the gate valve is in the closed state, the limiting block is inserted into the bottom of the valve element, so that the stability of the valve element is enhanced when the gate valve is in the closed state.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to an improved and durable gate valve. Background Technology

[0002] Gate valves, as commonly used fluid control devices, are widely used in various industries and fields, such as chemical, power, petroleum, natural gas, and water conservancy. With the continuous development of industrial manufacturing and equipment management, the importance of valves in systems is becoming increasingly prominent; high-performance valves can not only improve system operating efficiency but also ensure operational safety. Therefore, the industry's demand for high-performance valves is increasing year by year.

[0003] Chinese Patent CN221120980U discloses a durable gate valve. It comprises a valve core, a movable sleeve, a limiting element, and a driving element. The valve core is driven by a valve stem, and the driving element is fixed to the valve core and moves synchronously with it. When the wedge block moves downwards, the movable sleeve moves towards the valve core using the cooperation of the inclined surface and the positioning platform, eventually contacting the side of the valve core to close the flow hole and completely shut off the valve. When the valve core drives the wedge block upwards, a first spring pushes the movable sleeve away from the valve core, thus reducing wear between the movable sleeve and the valve core and extending the service life of either the movable sleeve or the valve core. However, when it is difficult to clean deposits on the valve core surface or the gate valve's sealing performance is insufficient, problems such as valve core jamming, sealing surface damage, and fluid leakage occur. Therefore, this paper proposes an improved durable gate valve. Utility Model Content

[0004] The main purpose of this utility model is to provide an improved and durable gate valve to solve the problems of valve core jamming, sealing surface damage, and fluid leakage that occur when the valve core surface is difficult to clean and the gate valve sealing performance is insufficient, as mentioned in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, an improved and durable gate valve is provided, comprising a valve body, an inlet chamber and an outlet chamber that are interconnected through the valve body, a cavity at the center of the top of the valve body, a valve cover at the top of the valve body, a valve core for controlling the opening and closing of the gate valve that is slidably disposed within the cavity, a fixing rod fixedly connected to the center of the top of the valve core, cleaning parts for cleaning the outer wall of the valve core that are disposed on both sides of the valve body near the cavity, and a slot is provided below the connection between the inlet chamber and the outlet chamber of the valve body, a limit block is fixedly disposed at the center of the slot, and when the gate valve is closed, the limit block is inserted into the bottom of the valve core.

[0006] Furthermore, the valve body has sliding grooves on both sides near the cavity, and the cleaning part includes a fixed plate that is slidably installed in the sliding groove. One end of the fixed plate is fixedly connected to dense bristles, and the other end of the fixed plate is fixedly connected to a spring, and one end of the spring is fixedly connected to the inner wall of the sliding groove.

[0007] Furthermore, a groove is provided at the center of the bottom of the valve core, and several limiting grooves communicating with the groove are provided on both sides of the groove.

[0008] Furthermore, several limiting protrusions are fixedly connected to both sides of the limiting block, and the upper end of the limiting block is designed with a rounded transition. When the gate valve is closed, the lower end of the valve core is inserted into the slot, and the limiting block is inserted into the groove, with the limiting protrusions engaging in the limiting groove.

[0009] Furthermore, a sealing ring is fixedly installed below the cavity, the inner wall of the sealing ring is tightly fitted with the outer wall of the valve core, and an annular groove is also provided on the upper inner wall of the sealing ring.

[0010] Furthermore, a connecting rod is rotatably provided at the bottom center of the valve cover, a connecting plate is fixedly connected to the top of the connecting rod, a threaded groove is provided inside the connecting rod, and one end of the fixing rod is threaded into the threaded groove.

[0011] Furthermore, several guide plates are fixedly provided on the inner walls of both the inlet and outlet chambers. The guide plates are streamlined and inclined from one end of the inlet chamber to the other end of the outlet chamber.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In this improved and durable gate valve, a cleaning section is provided, which includes a fixed plate, brush bristles, and spring that are slidably installed in the slide groove. This enables automatic cleaning of the outer wall of the valve core. The close contact between the brush bristles and the side wall of the valve core can effectively remove dirt and deposits, ensuring the sealing performance and smooth movement of the valve core, thereby improving the overall operating efficiency and reliability of the gate valve.

[0014] 2. In this improved and durable gate valve, a limiting block is provided, which is inserted into the groove at the bottom of the valve core. At the same time, the limiting protrusion is engaged in the limiting groove. This not only enhances the stability of the valve core when the gate valve is closed, but also extends the path of possible fluid leakage, increasing the difficulty of leakage. In addition, it provides more time and opportunities for detecting and repairing potential leaks, thereby improving the safety and durability of the gate valve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the improved durable gate valve in a preferred embodiment of this utility model;

[0016] Figure 2This is a cross-sectional view of the gate valve closed in a preferred embodiment of the present invention;

[0017] Figure 3 This is a cross-sectional view of the gate valve in a preferred embodiment of the present invention.

[0018] Figure 4 This is a preferred embodiment of the present invention. Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 5 This is a preferred embodiment of the present invention. Figure 3 Enlarged schematic diagram of the structure at point B;

[0020] Figure 6 This is a schematic diagram of the overall structure of the limiting block in a preferred embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the overall structure of the sealing ring in a preferred embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of the fixing rod installation structure in a preferred embodiment of the present invention;

[0023] Figure 9 This is a cross-sectional view of the sealing ring in a preferred embodiment of the present invention.

[0024] Illustration:

[0025] 1. Valve body; 11. Inlet chamber; 12. Outlet chamber; 13. Cavity; 14. Slide groove; 15. Limiting block; 151. Limiting protrusion; 16. Slot;

[0026] 2. Valve core; 21. Fixing rod; 22. Groove; 23. Limiting groove;

[0027] 3. Valve cover; 31. Connecting rod; 311. Threaded groove; 32. Connecting disc;

[0028] 4. Cleaning section; 41. Fixing plate; 42. Spring; 43. Brush bristles;

[0029] 5. Sealing ring; 51. Ring groove; 52. Through groove; 6. Guide plate. Detailed Implementation

[0030] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0031] Please see Figures 1-9As shown, the purpose of this embodiment is to provide an improved and durable gate valve, including a valve body 1, through which an inlet chamber 11 and an outlet chamber 12 are opened and communicate with each other. A cavity 13 is opened at the center of the top of the valve body 1. A valve cover 3 is provided on the top of the valve body 1. A valve core 2 for controlling the opening and closing of the gate valve is slidably arranged in the cavity 13. A fixing rod 21 is fixedly connected to the center of the top of the valve core 2. Cleaning parts 4 for cleaning the outer wall of the valve core 2 are provided on both sides of the cavity 13 in the valve body 1. A slot 16 is opened below the connection between the inlet chamber 11 and the outlet chamber 12 in the valve body 1. A limit block 15 is fixedly arranged at the center of the slot 16. When the gate valve is closed, the limit block 15 is inserted into the bottom of the valve core 2.

[0032] The valve body 1 has grooves 14 on both sides near the cavity 13. The cleaning part 4 includes a fixed plate 41 that is slidably installed in the groove 14. One end of the fixed plate 41 is fixedly connected to dense bristles 43, and the other end of the fixed plate 41 is fixedly connected to a spring 42. One end of the spring 42 is fixedly connected to the inner wall of the groove 14, so that the fixed plate 41 is always subjected to a spring force from the spring 42. This spring force will push the fixed plate 41 to slide outward along the groove 14, that is, towards the side wall of the valve core 2, so that the bristles 43 are in close contact with the side wall of the valve core 2. These bristles 43 are made of materials with high wear resistance and softness to ensure that they can effectively remove dirt and residues on the side wall of the valve core 2 without damaging the valve core 2.

[0033] A groove 22 is provided at the center of the bottom of the valve core 2, and several limiting grooves 23 communicating with the groove 22 are provided on both sides of the groove 22.

[0034] Several limiting protrusions 151 are fixedly connected to both sides of the limiting block 15, and the upper end of the limiting block 15 has a rounded transition design, i.e., a rounded corner. When the gate valve is closed, the lower end of the valve core 2 is inserted into the slot 16. The rounded corner design of the upper end of the limiting block 15 helps to reduce friction and resistance during the insertion process. The limiting block 15 is inserted into the groove 22, and the limiting protrusions 151 are engaged in the limiting groove 23. These limiting protrusions 151 are made of a certain elastic material, which allows them to undergo slight deformation when subjected to external force. During the insertion process of the limiting block 15, the limiting protrusions 151 will... First, it is slightly squeezed by the inner wall of the slot 16, resulting in elastic contraction. As the valve core 2 descends further, the limiting protrusion 151 will gradually align and lock into the limiting groove 23. The plug-in design of the limiting block 15 not only enhances the stability of the valve core 2 in the closed state of the gate valve, but also extends the path of possible fluid leakage. Even if a small amount of fluid leaks from the gap between the valve core 2 and the side wall of the slot 16, it must bypass the complex path formed by the limiting block 15 and the limiting protrusion 151 to continue flowing. This not only increases the difficulty of leakage, but also provides more time and opportunities for detecting and repairing potential leaks.

[0035] Furthermore, when the gate valve is closed, the sidewall of the valve core 2 is directly exposed to the fluid environment. Due to the flow characteristics of the fluid and the possible presence of impurities, the outer wall of the valve core 2 is likely to be covered with a layer of dirt, deposits, or other forms of attachments. The presence of these attachments not only affects the sealing performance of the valve core 2 but may also hinder the movement of the valve core 2, thereby affecting the overall operating efficiency and reliability of the gate valve. As the gate valve gradually opens, the valve core 2 gradually moves upward. During this process, the sidewall of the valve core 2 will gradually come into contact with the bristles 43 in the cleaning section 4. Due to their dense arrangement and high flexibility, these bristles 43 can effectively remove the attachments on the sidewall of the valve core 2. The spring 42 on one side of the fixing plate 41 ensures that the bristles 43 are always in close contact with the sidewall of the valve core 2. Regardless of the position of the valve core 2, this close contact not only helps the bristles 43 to remove the attachments more effectively but also adapts to the surface change of the valve core 2, which is wider at the top and narrower at the bottom.

[0036] A sealing ring 5 is fixedly installed below the cavity 13. The sealing ring 5 is made of an elastic material, preferably silicone. A through groove 52 is opened through the center of the sealing ring 5. The valve core 2 is inserted into the through groove 52. The inner wall of the sealing ring 5 is tightly fitted with the outer wall of the valve core 2. When the valve core 2 gradually moves down, the inner wall of the sealing ring 5 is compressed by the pressure from the valve core 2 and tightly fits against the outer wall of the valve core 2, ensuring the sealing between the valve core 2 and the cavity 13. This effectively prevents fluid from entering the cavity 13 and avoids potential damage to the valve core 2 and its fixing rod 21. The through groove 52 is composed of a hole with an inverted trapezoidal cross-section at the upper end and a rectangular cross-section at the lower end. The hypotenuse of the trapezoidal cross-section is 45°. When the valve core 2 gradually moves down in the through groove 52, its outer wall will contact the sealing ring. Due to the trapezoidal cross-section and inclined side design, the outer wall of the valve core 2 exerts a gradually increasing squeezing force on the inner wall of the sealing ring 5 as it moves downward. This allows the inner wall of the sealing ring 5 to expand outward, thus fitting more tightly to the outer wall of the valve core 2. This tight fit effectively prevents fluid leakage through the tiny gap between the valve core 2 and the sealing ring 5, enhancing the sealing performance of the gate valve. The upper inner wall of the sealing ring 5 also features a specially designed annular groove 51. This design plays a crucial role when fluid leaks from the tiny gap between the inner wall of the sealing ring 5 and the outer wall of the valve core 2. The annular groove 51 can accommodate and temporarily store a portion of the leaked fluid, thereby slowing down the leakage rate and providing maintenance personnel with valuable time to detect and repair potential leaks.

[0037] A connecting rod 31 is rotatably mounted at the bottom center of the valve cover 3. A connecting plate 32 is fixedly connected to the top of the connecting rod 31. A threaded groove 311 is opened inside the connecting rod 31, and one end of the fixing rod 21 is threaded into the threaded groove 311. Therefore, by rotating the connecting plate 32 clockwise, the connecting rod 31 is rotated, thereby driving the fixing rod 21 to move downward to insert one end of the valve core 2 into the slot 16, thus closing the gate valve. By rotating the connecting plate 32 counterclockwise, the connecting rod 31 is rotated, thereby driving the fixing rod 21 to move upward to pull the valve core 2 out of the slot 16, thus opening the gate valve.

[0038] Several guide plates 6 are fixedly installed on the inner walls of both the inlet chamber 11 and the outlet chamber 12. The guide plates 6 are streamlined and inclined from one end of the inlet chamber 11 to the other end of the outlet chamber 12. This allows the fluid to gradually change its flow direction along the guide plates 6 after entering the gate valve, and finally smoothly enter the outlet chamber 12. The guide plates 6 effectively reduce the impact and corrosion of the fluid on the inner wall of the valve body 1 during the flow process, avoiding wear and thus effectively protecting the inner wall of the valve body 1. The fluid flows smoothly under the guidance of the guide plates 6, reducing the scouring and wear on the inner wall of the valve body 1, thereby extending the service life of the valve body 1.

[0039] In practical use, when the gate valve needs to be closed, rotating the connecting plate 32 clockwise causes the connecting rod 31 to rotate together, and the fixing rod 21 moves downward accordingly. As the fixing rod 21 descends, it pushes the valve core 2 downward until the lower end of the valve core 2 is accurately inserted into the slot 16. At the same time, the limiting block 15 is inserted into the groove 22 at the bottom of the valve core 2, and the limiting protrusion 151 is engaged in the limiting groove 23, achieving a stable closed state. When the gate valve needs to be opened, rotating the connecting plate 32 counterclockwise... The connecting rod 31 rotates together, and the fixed rod 21 moves upward accordingly. As the fixed rod 21 rises, the valve core 2 is pulled out from the slot 16, and the gate valve gradually opens. The fluid can flow smoothly from the inlet chamber 11 into the outlet chamber 12. The side wall of the valve core 2 will contact the bristles 43 in the cleaning part 4, effectively removing dirt and deposits on the side wall of the valve core 2. If the fluid leaks from the tiny gap between the inner wall of the sealing ring 5 and the outer wall of the valve core 2, the ring groove 51 will accommodate and temporarily store a portion of the leaked fluid.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An improved durable gate valve, comprising a valve body (1), a liquid inlet cavity (11) and a liquid outlet cavity (12) are communicated with each other through the valve body (1), a cavity (13) is arranged at the top center of the valve body (1), and a valve cover (3) is arranged at the top of the valve body (1), characterized in that, The cavity (13) is slidably provided with a valve core (2) for controlling the opening and closing of the gate valve, the top center of the valve core (2) is fixedly connected with a fixed rod (21), the valve body (1) is provided with a cleaning part (4) for cleaning the outer wall of the valve core (2) near both sides of the cavity (13), and the valve body (1) is provided with a slot (16) below the connection between the inlet cavity (11) and the outlet cavity (12), the center of the slot (16) is fixedly provided with a limiting block (15), and the limiting block (15) is inserted into the bottom of the valve core (2) in the closed state of the gate valve.

2. The improved long-lasting gate valve according to claim 1, wherein, The valve body (1) is provided with a sliding groove (14) near both sides of the cavity (13), the cleaning part (4) comprises a fixed plate (41) slidably installed in the sliding groove (14), one end of the fixed plate (41) is fixedly connected with dense bristles (43), the other end of the fixed plate (41) is fixedly connected with a spring (42), and one end of the spring (42) is fixedly connected with the inner wall of the sliding groove (14).

3. The improved long-lifetime gate valve according to claim 1, wherein The bottom center of the valve core (2) is provided with a groove (22), and a plurality of limiting grooves (23) are provided on both sides of the groove (22).

4. The improved long-lifetime gate valve according to claim 3, wherein The limiting block (15) is fixedly connected with a plurality of limiting protrusions (151) on both sides, and the upper end of the limiting block (15) is designed as a circular arc transition, the lower end of the valve core (2) is inserted into the slot (16) in the closed state of the gate valve, and the limiting block (15) is inserted into the groove (22), and the limiting protrusions (151) are clamped in the limiting grooves (23).

5. The improved long-lifetime gate valve according to claim 1, wherein, The lower side of the cavity (13) is fixedly provided with a sealing ring (5), the inner wall of the sealing ring (5) is tightly attached to the outer wall of the valve core (2), and the inner wall of the upper end of the sealing ring (5) is also provided with a ring groove (51).

6. The improved long-lifetime gate valve according to claim 1, wherein, The bottom center of the valve cover (3) is rotatably provided with a connecting rod (31), the top of the connecting rod (31) is fixedly connected with a connecting disc (32), the connecting rod (31) is provided with a screw groove (311) inside, and one end of the fixed rod (21) is threadedly installed in the screw groove (311).

7. The improved long-lasting gate valve according to claim 1, wherein, The inner walls of the inlet cavity (11) and the outlet cavity (12) are fixedly provided with a plurality of guide plates (6), the guide plates (6) are designed in a streamline shape, and the guide plates (6) are inclined from one end of the inlet cavity (11) to one end of the outlet cavity (12).

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