Anti-backflow ball valve ball

Abstract

The utility model belongs to the field of fluid control technology relates to a kind of anti -backflow ball valve ball, including the ball body with through hole, still include: limiting protrusion, in the through hole inner wall of ball body;Mounting rod, its both ends transverse fixed connection in the through hole inner wall of ball body;Check assembly, including check base and a pair of check piece, check base is detachably connected in the middle part of mounting rod, check piece is rotatably connected in the two sides of check base by rotating structure respectively;Wherein, check piece is rotated to with limiting protrusion abutment by rotating structure under the impact of backflow fluid, to close through hole.The utility model is by being equipped with limiting protrusion, fixed mounting rod in the through hole inner wall of ball, cooperate detachable check base with rotatable check piece, check piece abutment protrusion closes channel when backflow, realize anti -backflow and the component is easy to disassemble.

Description

Technical Field

[0001] This utility model belongs to the field of fluid control technology, and specifically refers to a ball of an anti-backflow ball valve. Background Technology

[0002] The ball of a ball valve is the core component of the ball valve and is widely used in petrochemical, water supply and drainage, industrial pipeline and other fields. It realizes the opening and closing of pipeline or the regulation of flow through rotation. It is a key component for controlling the fluid delivery path and state and directly affects the operating efficiency and stability of the pipeline system.

[0003] Existing ball valve bodies with anti-backflow function suffer from complex anti-backflow structures that are difficult to disassemble. Some designs use bolts or welding to fix the check valve component inside the ball, increasing manufacturing difficulty and requiring disassembly of the ball valve and the use of specialized tools for maintenance, making the process cumbersome. Other designs integrate the check valve structure with the ball, reducing assembly steps, but requiring replacement of the entire ball if the check valve structure fails, resulting in high maintenance costs and a lack of flexibility to adapt to different operating conditions. Therefore, there is an urgent need for a ball valve body with a simple anti-backflow structure that is easy to assemble and disassemble. Utility Model Content

[0004] This invention provides a limiting protrusion and a fixed mounting rod on the inner wall of the sphere's through hole, along with a detachable check base and a rotatable check plate. During backflow, the check plate abuts against the protrusion to seal the channel, thus preventing backflow and making the components easy to disassemble and assemble, thereby alleviating the problems mentioned in the background art.

[0005] The purpose of this utility model is achieved as follows: a backflow prevention ball valve body, comprising a ball body with a through hole, and further comprising: A limiting protrusion is provided on the inner wall of the through hole of the sphere body; The mounting rod has its two ends horizontally fixed to the inner wall of the through hole of the sphere body; A check valve assembly includes a check valve base and a pair of check valve plates. The check valve base is detachably connected to the middle of the mounting rod, and the check valve plates are rotatably connected to both sides of the check valve base via a rotating structure. The check valve rotates under the impact of the backflowing fluid until it abuts against the limiting protrusion, thereby sealing the through hole.

[0006] The present invention is further configured such that the check base includes a clamping assembly, the clamping assembly comprising: A pair of clamping arms, the inner surface of which is provided with a locking part that is adapted to the shape of the mounting rod; A pair of manual operating parts are respectively located on the outside of the two clamping arms, used to receive external operating force to open or close the clamping arms; An elastic reset element, disposed between the two clamping arms, is used to provide a preload force that keeps the locking portion of the clamping arms clamped to the mounting rod.

[0007] The present invention is further configured such that the locking part includes: Multiple locking protrusions are distributed at intervals along the circumference of the mounting rod; A locking groove is provided on the inner surface of the clamping arm to match the locking protrusion.

[0008] The present invention is further configured such that the rotating structure includes: Rotating grooves are spaced apart on the outer surface of the clamping arm; A rotating sleeve is fitted inside the rotating groove and is fixedly connected to the corresponding check plate.

[0009] The present invention is further configured such that the rotating sleeve is made of an elastic material.

[0010] The present invention is further provided that the outer surface of the manual operation part is provided with an anti-slip structure.

[0011] The present invention is further configured such that the check sheet is semi-circular.

[0012] By adopting the above technical solution, the beneficial effects that this utility model can achieve are: 1. Through a simple combination of a limiting protrusion, a mounting rod, and a check valve assembly, the check valve achieves rotary opening and closing via a rotating structure, simplifying the overall construction of the anti-backflow structure and reducing the number of parts and processing steps. 2. The check valve assembly can be quickly removed from or installed on the mounting rod by means of a detachable connection between the check valve base and the mounting rod, and the manual operation unit controls the opening and closing of the clamping arm. This eliminates the need to disassemble the entire ball valve, simplifying maintenance operations.

[0013] 3. Due to the detachable design of the check valve assembly, when the check valve plate or base is damaged, the damaged part can be replaced individually without replacing the entire ball, which reduces maintenance costs and also makes it easy to flexibly adjust the check valve assembly according to different working conditions. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention when it is used to stop the flow; Figure 3 This is a utility model Figure 2 A magnified structural diagram of part A; Figure 4 This is a cross-sectional view of the present invention during flow. Figure 5 This is a three-dimensional structural diagram of the clamping assembly of this utility model.

[0015] The attached figures are labeled as follows: 1. Sphere body; 2. Through hole; 3. Limiting protrusion; 4. Mounting rod; 5. Check valve assembly; 50. Check valve base; 51. Check valve plate; 6. Rotating structure; 60. Rotating groove; 61. Rotating sleeve; 7. Clamping assembly; 70. Clamping arm; 71. Manual operation part; 72. Elastic reset part; 8. Locking part; 80. Locking protrusion; 81. Locking groove; 9. Anti-slip structure. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-5 : Example 1: This embodiment provides a backflow prevention ball valve ball, including a ball body 1 with a through hole 2, and further comprising: The limiting protrusion 3 is provided on the inner wall of the through hole 2 of the sphere body 1; Mounting rod 4, with its two ends horizontally fixed to the inner wall of the through hole 2 of the sphere body 1; The check valve assembly 5 includes a check valve base 50 and a pair of check valve plates 51. The check valve base 50 is detachably connected to the middle of the mounting rod 4, and the check valve plates 51 are rotatably connected to both sides of the check valve base 50 via a rotating structure 6. The check valve 51 is rotated by the rotating structure 6 under the impact of the backflow fluid until it abuts against the limiting protrusion 3, thereby sealing the through hole 2.

[0017] The sphere body 1 is spherical in shape and has a through hole 2 inside. This through hole 2 is a channel that runs along the axis of the sphere, allowing fluid to pass through. Its main function is to control the opening and closing of the pipeline through its own rotation, and at the same time provide a mounting base for other components. The inner wall of the through hole 2 is the mounting carrier for the limiting protrusion 3 and the mounting rod 4.

[0018] The limiting protrusion 3 is a raised structure on the inner wall of the through hole 2 of the sphere body 1. It is a multi-ring plate-like structure integrally formed with the sphere body 1. Its position corresponds to the edge of the check plate 51 when it closes the through hole 2. Its function is to provide mechanical limitation when the check plate 51 rotates to the closed position, ensuring that the check plate 51 fits tightly to close the through hole 2 and prevent backflow fluid leakage.

[0019] The mounting rod 4 is a rod-shaped structure, with both ends fixedly connected to the inner wall of the through hole 2 perpendicular to the axis of the through hole 2. The connection method can be welding or integral molding with the sphere body 1. Its main function is to serve as a support carrier for the check valve assembly 5, providing an installation position for the check valve base 50 and ensuring that the check valve assembly 5 works stably within the through hole 2.

[0020] The check valve assembly 5 is used to prevent backflow and includes a check valve base 50 and a pair of check valve plates 51. The check valve base 50 is detachably connected to the middle of the mounting rod 4. Its function is to support the check valve plates 51 and connect the check valve plates 51 to the mounting rod 4, while also facilitating overall disassembly and maintenance. The check valve plates 51 are a pair of plate-like structures, the shape of which is adapted to the cross-section of the through hole 2. The two check valve plates 51 are respectively connected to both sides of the check valve base 50 through the rotating structure 6. They can rotate around the check valve base 50 through the rotating structure 6. During normal flow, they do not obstruct the fluid, and during backflow, they close to seal the through hole 2.

[0021] The rotating structure 6 is a component that connects the check plate 51 and the check base 50. Its function is to realize the rotational movement of the check plate 51, so that the check plate 51 can be flexibly opened or closed under fluid impact.

[0022] In the above design, when the fluid flows normally, it flows forward along the through hole 2. The impact force pushes the check plate 51 to rotate and open around the check base 50. At this time, the check plate 51 and the inner wall of the through hole 2 form a flow space, allowing the fluid to pass smoothly. When backflow occurs, the reverse-flowing fluid impacts the check plate 51, forcing it to rotate in the opposite direction around the check base 50 until the edge of the check plate 51 abuts against the limiting protrusion 3 on the inner wall of the through hole 2. At this time, the two check plates 51 together close the through hole 2, preventing the fluid from continuing to flow backward. When the forward fluid flows again, the impact force will push the check plate 51 to rotate and open again, restoring flow. Throughout the process, the mounting rod 4 provides stable support for the check assembly 5, and the detachable connection of the check base 50 facilitates the maintenance and replacement of the assembly.

[0023] The check base 50 includes a clamping assembly 7, which includes a pair of clamping arms 70, a pair of manual operating parts 71, and an elastic reset member 72. The inner surfaces of the two clamping arms 70 are provided with locking parts 8 that are adapted to the shape of the mounting rod 4. The two manual operating parts 71 are respectively located on the outer sides of the two clamping arms 70 for receiving external operating forces to open or close the clamping arms 70. The elastic reset member 72 is located between the two clamping arms 70 for providing a preload force to keep the locking parts 8 of the clamping arms 70 clamped to the mounting rod 4. The purpose of the above design is to enable the check base 50 to be stably and conveniently connected to the mounting rod 4 by constructing a clamping assembly 7 that includes a pair of clamping arms 70, a pair of manual operating parts 71, and an elastic reset member 72. The clamping arms 70 are plate-shaped structures adapted to the shape of the mounting rod 4, and the inner surface is provided with a locking part 8 adapted to the shape of the mounting rod 4. The two clamping arms 70 are symmetrically distributed to form a clamping space. The manual operating part 71 is a plate-shaped structure located on the outside of the two clamping arms 70, integrally formed or fixedly connected to the clamping arms 70, and can accept external operating force to drive the clamping arms 70 to open or close. The elastic reset member 72 is a component with elastic deformation capability, such as a spring or elastic sheet, and its two ends are respectively connected to the inner side of the two clamping arms 70, which can provide continuous preload force. When the check base 50 needs to be installed, apply external force to the manual operating part 71 to open the clamping arm 70 against the pre-tightening force of the elastic reset member 72, insert the mounting rod 4 between the two clamping arms 70, and then remove the external force. The elastic reset member 72 drives the clamping arm 70 to close, so that the locking part 8 and the mounting rod 4 fit tightly together to achieve clamping and fixation. When disassembly is required, operate the manual operating part 71 again to open the clamping arm 70 and remove the check base 50. This achieves quick disassembly and assembly of the check base 50 and the mounting rod 4, while ensuring the stability of the check base 50 on the mounting rod 4 during normal use, which facilitates subsequent maintenance and replacement.

[0024] The locking part 8 includes a plurality of locking protrusions 80 spaced apart circumferentially along the mounting rod 4, and locking grooves 81 provided on the inner surface of the clamping arm 70 that match the locking protrusions 80. The purpose of the above design is to enhance the stability of the connection between the anti-return base 50 and the mounting rod 4 by providing a locking part 8 containing a plurality of locking protrusions 80 and matching locking grooves 81: the locking protrusions 80 are block-shaped or strip-shaped protrusions spaced apart circumferentially along the mounting rod 4 and are integrally formed with the mounting rod 4; the locking grooves 81 are recessed structures provided on the inner surface of the clamping arm 70, whose shape is adapted to the locking protrusions 80, and are integrally formed with the clamping arm 70. When the clamping arm 70 of the clamping assembly 7 closes under the action of the elastic reset member 72, the locking protrusion 80 will be embedded in the corresponding locking groove 81. Through the interlocking connection between the protrusion and the groove, the movement of the check base 50 along the axial or circumferential direction of the mounting rod 4 is restricted, so as to avoid the position displacement of the check base 50 caused by fluid impact or vibration. At the same time, it does not affect the disassembly and assembly by opening the clamping arm 70 through the manual operation part 71, further ensuring the stability of the check assembly 5 and ensuring the reliable function of the anti-backflow function.

[0025] The rotating structure 6 includes rotating grooves 60 spaced apart on the outer surface of the clamping arm 70, and a rotating sleeve 61 fitted inside the rotating grooves 60 and fixedly connected to the corresponding check plate 51. The purpose of the above design is to achieve a flexible rotational connection between the check plate 51 and the clamping arm 70 by setting the rotating structure 6, which includes the rotating grooves 60 and the rotating sleeve 61: the rotating grooves 60 are annular grooves spaced apart on the outer surface of the clamping arm 70 and integrally formed with the clamping arm 70; the rotating sleeve 61 is an annular structure adapted to the rotating grooves 60, fitted inside the rotating grooves 60 and bolted to the corresponding check plate 51 or integrally formed. The rotating sleeve 61 can rotate smoothly along the annular trajectory of the rotating groove 60, driving the check plate 51 to rotate synchronously. This ensures that the check plate 51 can open or close flexibly under fluid impact, and the rotating groove 60 limits the rotating sleeve 61 to prevent the check plate 51 from disengaging from the clamping arm 70 during rotation. This ensures the stability of the connection between the check plate 51 and the check base 50, thereby guaranteeing the reliable realization of the anti-backflow function.

[0026] The rotating sleeve 61 is made of an elastic material. The purpose of this design is to utilize the inherent deformation properties of elastic materials, such as rubber or polytetrafluoroethylene, to ensure a tight seal between the rotating sleeve 61 and the rotating groove 60 when the sleeve is fitted into the groove, effectively preventing fluid leakage. Simultaneously, sufficient lubrication and a reasonable clearance design ensure flexible rotation even under fluid pressure, achieving a balance between dynamic sealing and flexible opening and closing.

[0027] The outer surface of the manual operating part 71 is provided with an anti-slip structure 9. The purpose of the above design is to increase the friction between the hand and the manual operating part 71 during operation by providing an anti-slip structure 9 on the outer surface of the manual operating part 71, so as to avoid hand slippage affecting operation. The anti-slip structure 9 is mostly strip-shaped texture, dot-shaped protrusions or grid-shaped depressions distributed at intervals along the outer surface of the manual operating part 71, and is integrally formed with the manual operating part 71. When the operator applies force to the manual operating part 71 to control the opening or closing of the clamping arm 70, the anti-slip structure 9 can increase the contact resistance between the hand and the operating part, ensuring that the external force can be stably transmitted to the clamping arm 70, so that the clamping arm 70 can accurately respond to the operation action, smoothly realize the disassembly and assembly of the check base 50 and the mounting rod 4, and at the same time avoid operational errors or hand fatigue caused by slippage, ensuring the convenience and reliability of the maintenance process.

[0028] The check valve 51 is semi-circular. The purpose of the above design is to make the shape of the check valve 51 semi-circular so that it can be adapted to the circular cross-section of the through hole 2 of the sphere body 1: the two semi-circular check valves 51 are respectively connected to both sides of the check valve base 50. When they rotate and close under the impact of the backflow fluid, they can be spliced ​​together to form a circular structure with the same cross-section size as the through hole 2, completely covering the internal channel of the through hole 2, avoiding fluid leakage caused by gaps due to the mismatch between the shape of the check valve 51 and the channel, and ensuring the sealing effect; at the same time, when the fluid flows in the forward direction, the semi-circular structure can be smoothly rotated and opened with the rotating structure 6 as the axis. The two check valves 51 unfold to both sides, which can minimize the obstruction of the fluid, reduce the flow resistance, and ensure that the fluid can be smoothly transported along the through hole 2, taking into account both the anti-backflow function and the fluid transport efficiency.

[0029] In this embodiment, when fluid flows forward along the through hole 2 of the sphere body 1, the fluid impact force pushes the check valve 51 to rotate and open around the rotating sleeve 61. The check valve 51 does not obstruct fluid flow. The rotating sleeve 61 is fitted inside the rotating groove 60 on the outer surface of the clamping arm 70 and is fixedly connected to the semi-circular check valve 51. The rotating sleeve 61 is made of elastic material. When fluid backflow occurs, the reverse fluid impacts the check valve 51, causing the check valve 51 to rotate in the opposite direction along the rotating sleeve 61 in the rotating groove 60 until the edge of the check valve 51 abuts against the limiting protrusion 3 on the inner wall of the through hole 2. The two semi-circular check valves 51 are spliced ​​together to form a complete closed structure, completely sealing the through hole 2 to prevent backflow. Throughout the process, the check base 50 is stably connected to the middle of the mounting rod 4 via the clamping assembly 7. The clamping assembly 7 includes a pair of clamping arms 70, a pair of manual operating parts 71, and an elastic reset member 72. The inner surface of the clamping arms 70 is provided with locking grooves 81, and the mounting rod 4 is circumferentially distributed with locking protrusions 80. The locking grooves 81 match the locking protrusions 80. The elastic reset member 72 is located between the two clamping arms 70 to provide pre-tightening force, so that the locking grooves 81 and the locking protrusions 80 are tightly engaged, ensuring that the clamping arms 70 always clamp the mounting rod 4 and prevent the check base 50 from shifting. The manual operating parts 71 are located on the outside of the two clamping arms 70 and have an anti-slip structure 9 on their outer surface. During the initial installation or subsequent maintenance, the operator can apply force to control the opening and closing of the clamping arms 70 to realize the disassembly and assembly of the check base 50, ensuring the overall working state of the check assembly 5 is stable, and thus reliably realizing the anti-backflow function.

[0030] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A ball valve ball against backflow, comprising a ball body (1) having a through hole (2), characterized in that, Also includes: A limiting protrusion (3) is provided on the inner wall of the through hole (2) of the sphere body (1); Mounting rod (4), both ends of which are horizontally fixed to the inner wall of the through hole (2) of the sphere body (1); The check valve assembly (5) includes a check valve base (50) and a pair of check valve plates (51). The check valve base (50) is detachably connected to the middle of the mounting rod (4), and the check valve plates (51) are rotatably connected to both sides of the check valve base (50) via a rotating structure (6). The check valve (51) rotates under the impact of the backflow fluid through the rotating structure (6) to abut against the limiting protrusion (3) to seal the through hole (2); The check base (50) includes a clamping assembly (7), which includes: A pair of clamping arms (70), the inner surface of which is provided with a locking part (8) that is adapted to the shape of the mounting rod (4); A pair of manual operating parts (71) are respectively provided on the outside of the two clamping arms (70) for receiving external operating force to open or close the clamping arms (70); An elastic reset member (72) is provided between the two clamping arms (70) to provide a preload force that keeps the locking part (8) of the clamping arm (70) clamped to the mounting rod (4).

2. A ball valve ball according to claim 1, wherein The locking part (8) includes: Multiple locking protrusions (80) are circumferentially spaced along the mounting rod (4); A locking groove (81) is provided on the inner surface of the clamping arm (70) to match the locking protrusion (80).

3. A ball valve ball according to claim 1, wherein The rotating structure (6) includes: Rotating grooves (60) are spaced apart on the outer surface of the clamping arm (70); The rotating sleeve (61) is fitted inside the rotating groove (60) and is fixedly connected to the corresponding check piece (51).

4. A ball valve ball according to claim 3, wherein The rotating sleeve (61) is made of an elastic material.

5. A ball valve ball according to claim 1, wherein The outer surface of the manual operation part (71) is provided with an anti-slip structure (9).

6. A ball valve ball according to claim 1, wherein The check valve (51) is semi-circular.

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