Ball valve with non-return function

Abstract

The utility model relates to the technical field of ball valves, and discloses a ball valve with a non-return function, which comprises a valve body, a ball body is arranged in the valve body, a through hole is arranged on the outer wall of the ball body, the outer wall of the ball body is fixedly connected with a valve rod, and one end of the valve rod far away from the ball body is fixedly connected with a handle. A sealing ring is fixedly connected to the inner wall of the valve body and movably connected with the ball body, and a non-return assembly is arranged on the inner wall of the valve body. According to the ball valve with the non-return function, liquid pushes the non-return block, so that the non-return block is not in contact with the inner wall of the limiting ring, the liquid flows through a gap between the non-return block and the limiting ring, when the liquid flows back, the liquid pushes the non-return block to slide leftwards, then the non-return block is in contact with the inner wall of the limiting ring, and the liquid cannot continuously flow leftwards; non-return of the valve body is achieved, one-way flowing of a pipeline system is guaranteed, operation stability is improved, and the valve is safer and more durable.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically a ball valve with a check valve function. Background Technology

[0002] A ball valve is a type of valve that uses a ball as its opening and closing element. The rotation of the ball controls the flow of fluid. It features simple structure, good sealing performance, convenient operation, and rapid switching. It is widely used in industries such as petroleum, chemical, water treatment, and pharmaceutical. Ball valves are divided into two types: floating ball valves and fixed ball valves. The former relies on the pressure of the medium to achieve sealing, while the latter is suitable for large-diameter and high-pressure conditions. Ball valves can also be classified according to their driving method, such as manual, pneumatic, and electric, to meet different automation control needs.

[0003] However, in actual use, the existing ball valves lack a check valve function, which can easily lead to reverse flow of water during use. This not only affects the working efficiency of the ball valve but also accelerates its wear and tear, posing certain safety hazards. In view of this, we propose a ball valve with a check valve function. Utility Model Content

[0004] The purpose of this invention is to provide a ball valve with a check valve function to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ball valve with a check valve function, comprising a valve body, a ball disposed inside the valve body, a through-hole formed on the outer wall of the ball, and a check valve assembly disposed on the inner wall of the valve body, the check valve assembly comprising:

[0006] A limiting ring is fixedly connected to the inner wall of the valve body. A mounting bracket is fixedly connected to the end face of the limiting ring. A rod is fixedly connected to the side wall of the mounting bracket. A check block is sleeved on the side wall of the rod. A trapezoidal block is fixedly connected to the end face of the check block. A circular groove is opened at the end of the check block away from the trapezoidal block.

[0007] A connecting sleeve is fixedly connected to the inner wall of the valve body, and a flexible arc plate is fixedly connected to the inner wall of the connecting sleeve.

[0008] Preferably, a valve stem is fixedly connected to the outer wall of the ball, a handle is fixedly connected to the end of the valve stem away from the ball, a sealing ring is fixedly connected to the inner wall of the valve body, and the sealing ring is movably connected to the ball.

[0009] Preferably, the inner wall of the limiting ring is provided with an annular groove, a sealing ring is fixedly connected to the inner wall of the annular groove, and a support frame is fixedly connected to the inner wall of the sealing ring.

[0010] Preferably, the cross-section of the support frame is cross-shaped, the support frame and the sealing ring are made of rubber, the outer wall of the sealing ring is movably connected to the outer wall of the trapezoidal block, and the support frame pushes the sealing ring so that the sealing ring and the check block are tightly abutted, further improving the sealing degree of the ball valve.

[0011] Preferably, the number of flexible arc plates is set to several, and the several flexible arc plates are divided into three groups. The three groups of flexible arc plates are arranged alternately on the inner wall of the connecting sleeve, and the size of the three groups of flexible arc plates increases sequentially.

[0012] Preferably, the check block is truncated cone-shaped, the inclined surface of the check block is movably connected to the inner wall of the limiting ring, the check block is provided with a large diameter end and a small diameter end, the large diameter end is provided on the side near the sphere, the small diameter end is provided on the side near the flexible arc plate, the trapezoidal block is provided on one side of the large diameter end, and the circular groove is provided on one side of the small diameter end.

[0013] Preferably, the trapezoidal block has an isosceles trapezoidal cross-section, the lower base of the trapezoidal block is fixedly connected to the side wall of the trapezoidal block, and the side wall of the trapezoidal block is movably connected to the inner wall of the through-hole. Rotating the ball causes the ball to push the trapezoidal block and the check block away from the ball, so that the outer wall of the check block abuts against the inner wall of the limiting ring, further improving the sealing degree of the ball valve.

[0014] Compared with the prior art, this utility model provides a ball valve with a check valve function, which has the following beneficial effects:

[0015] 1. This ball valve with a check function, through its check assembly, allows the liquid to push the check block, causing it to disengage from the inner wall of the limit ring. Liquid can then flow through the gap between the check block and the limit ring. When backflow occurs, the liquid pushes the check block to slide to the left, causing it to contact the inner wall of the limit ring, preventing further flow to the left and achieving valve body check. This ensures unidirectional flow in the pipeline system, improves operational stability, and makes the valve safer and more durable. The ball pushes the trapezoidal block and the check block away from the ball, causing the outer edge of the check block to... The inner wall of the check block abuts against the inner wall of the limit ring, further improving the sealing degree of the ball valve. The fit between the check block and the limit ring forms an additional sealing barrier. Even if the ball seal is damaged, the check block can still block the leakage of the medium, ensuring that the sealing performance of the valve is more reliable. After the ball valve is closed, the liquid flows to the flexible arc plate to disperse the impact force. The liquid pushes the flexible arc plate, and the elastic deformation of the flexible arc plate provides a buffering effect, so that the liquid flow gradually slows down and avoids the liquid stopping instantly. The liquid flow gradually decays, avoiding the formation of instantaneous high pressure peaks, reducing water hammer intensity, and extending the service life of the ball valve and check assembly.

[0016] 2. This ball valve with check function, through the setting of the sealing ring, the sealing ring and the check block are tightly abutted, which further improves the sealing degree of the ball valve. It allows the sealing ring to be finely adjusted according to the pressure, ensuring that it maintains a good sealing effect under different pressure environments. The function of the support frame is to provide support and buffer for the sealing ring, so that the sealing ring will not be deformed or damaged due to long-term pressure impact. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of this utility model;

[0019] Figure 3 This is a schematic diagram of the check valve assembly structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the flexible arc plate structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the check block structure of this utility model;

[0022] Figure 6 This utility model Figure 5 Schematic diagram of the structure of region A in the middle.

[0023] In the diagram: 1. Valve body; 2. Ball; 3. Through port; 4. Valve stem; 5. Handle; 6. Check valve assembly; 601. Limit ring; 602. Mounting bracket; 603. Stem; 604. Check valve block; 605. Trapezoidal block; 606. Circular groove; 607. Connecting sleeve; 608. Flexible arc plate; 7. Annular groove; 8. Sealing ring; 9. Support frame. Detailed Implementation

[0024] like Figures 1-6 As shown, this utility model provides a technical solution: a ball valve with a check valve function, including a valve body 1, a ball 2 disposed inside the valve body 1, a through-hole 3 opened on the outer wall of the ball 2, a valve stem 4 fixedly connected to the outer wall of the ball 2, a handle 5 fixedly connected to the end of the valve stem 4 away from the ball 2, a sealing ring fixedly connected to the inner wall of the valve body 1, the sealing ring being movably connected to the ball 2, and a check valve assembly 6 disposed on the inner wall of the valve body 1, the check valve assembly 6 including a limit ring 601, a mounting bracket 602, a rod 603, a check valve block 604, a trapezoidal block 605, a circular groove 606, and a connecting sleeve 607.

[0025] In one embodiment of this utility model, a limiting ring 601 is fixedly connected to the inner wall of the valve body 1. A mounting bracket 602 is fixedly connected to the end face of the limiting ring 601. A rod 603 is fixedly connected to the side wall of the mounting bracket 602. A check block 604 is sleeved on the side wall of the rod 603. A trapezoidal block 605 is fixedly connected to the end face of the check block 604. A circular groove 606 is opened at the end of the check block 604 away from the trapezoidal block 605. A connecting sleeve 607 is fixedly connected to the inner wall of the valve body 1. A flexible arc plate 608 is fixedly connected to the inner wall of the connecting sleeve 607. The number of flexible arc plates 608 is set to several, and the several flexible arc plates 608 are divided into three groups. The three groups of flexible arc plates 608 are staggered on the inner wall of the connecting sleeve 607, and the size of the three groups of flexible arc plates 608 increases sequentially.

[0026] The check block 604 is truncated cone-shaped, and its inclined surface is movably connected to the inner wall of the limiting ring 601. The check block 604 has a large-diameter end and a small-diameter end. The large-diameter end is located on the side near the ball 2, and the small-diameter end is located on the side near the flexible arc plate 608. The trapezoidal block 605 is located on the side of the large-diameter end, and the circular groove 606 is located on the side of the small-diameter end. The cross-section of the trapezoidal block 605 is an isosceles trapezoid. The lower base of the trapezoidal block 605 is fixedly connected to the side wall of the trapezoidal block 605. The side wall of the trapezoidal block 605 is movably connected to the inner wall of the through port 3. Rotating the ball 2 causes the ball 2 to push the trapezoidal block 605 and the check block 604 away from the ball 2, so that the outer wall of the check block 604 abuts against the inner wall of the limiting ring 601, further improving the sealing degree of the ball valve.

[0027] Liquid flows in from the left side of valve body 1 and flows out from the right side. When ball valve 2 is open, the liquid pushes check block 604, which slides to the right along rod 603, causing check block 604 to lose contact with the inner wall of limit ring 601. Liquid can then flow through the gap between check block 604 and limit ring 601. When backflow occurs, the liquid pushes check block 604 to the left, causing check block 604 to contact the inner wall of limit ring 601. Liquid can no longer flow to the left, thus achieving check valve 1, ensuring unidirectional flow in the pipeline system, improving operational stability, and making it safer and more durable.

[0028] When the ball valve is closed, turn the handle 5, and the ball 2 rotates, causing the ball 2 to push the trapezoidal block 605 and the check block 604 away from the ball 2. This causes the outer wall of the check block 604 to abut against the inner wall of the limit ring 601, further improving the sealing degree of the ball valve. The fit between the check block 604 and the limit ring 601 forms an additional sealing barrier. Even if the ball seal is damaged, the check block 604 can still block the leakage of the medium, ensuring that the sealing performance of the valve is more reliable. The fit between the check block 604 and the limit ring 601 forms an additional sealing barrier.

[0029] After the ball valve closes, the liquid flowing from the left side impacts the check block 604. This liquid is guided by the circular groove 606, causing it to flow towards the flexible arc plate 608. Three sets of flexible arc plates 608 are staggered on the inner wall of the connecting sleeve 607, with the size of the three sets of flexible arc plates 608 increasing sequentially. The liquid flows towards the flexible arc plate 608, dispersing the impact force. The liquid pushes the flexible arc plate 608, and the elastic deformation of the flexible arc plate 608 provides a buffering effect, gradually slowing down the liquid flow and preventing the liquid from stopping instantly. This gradually reduces the liquid flow and prevents the formation of instantaneous high-pressure peaks, reducing water hammer intensity and the impact force on the check block 604, ball 2, and pipeline, thereby extending the service life of the ball valve and check assembly 6 and reducing maintenance costs.

[0030] In addition, the inner wall of the limiting ring 601 is provided with an annular groove 7, the inner wall of the annular groove 7 is fixedly connected with a sealing ring 8, and the inner wall of the sealing ring 8 is fixedly connected with a support frame 9.

[0031] The cross-section of the support frame 9 is arranged in a cross shape. The support frame 9 and the sealing ring 8 are made of rubber. The outer wall of the sealing ring 8 is movably connected to the outer wall of the trapezoidal block 605. The support frame 9 pushes the sealing ring 8, and the sealing ring 8 abuts tightly against the check block 604, further improving the sealing degree of the ball valve. This allows the sealing ring 8 to be finely adjusted according to the pressure, ensuring a good sealing effect under different pressure environments. The function of the support frame 9 is to provide support and buffer for the sealing ring 8, so that the sealing ring 8 will not be deformed or damaged due to long-term pressure impact.

[0032] In this invention, during use, liquid flows in from the left side of valve body 1 and flows out from the right side. When ball valve 2 is open, the liquid pushes check block 604, causing it to slide to the right along rod 603, thus releasing it from contact with the inner wall of limit ring 601. Liquid can then flow through the gap between check block 604 and limit ring 601. When backflow occurs, the liquid pushes check block 604 to the left, causing it to contact the inner wall of limit ring 601, preventing further flow to the left and achieving check valve 1. This ensures unidirectional flow in the pipeline system and improves operational stability. When closing the ball valve, turning handle 5 rotates ball 2, causing it to push trapezoidal block 605 and check block 604 away from ball 2, bringing the outer wall of check block 604 into contact with the inner wall of limit ring 601. To further improve the sealing performance of the ball valve, the fit between the check block 604 and the limit ring 601 forms an additional sealing barrier. Even if the ball seal is damaged, the check block 604 can still block media leakage, ensuring more reliable valve sealing performance. After the ball valve is closed, the liquid flowing from the left side will impact the check block 604. This liquid is guided by the circular groove 606, causing the liquid to flow towards the flexible arc plate 608. Three sets of flexible arc plates 608 are staggered on the inner wall of the connecting sleeve 607. The size of the three sets of flexible arc plates 608 increases sequentially. The liquid flows towards the flexible arc plate 608 to disperse the impact force. The liquid pushes the flexible arc plate 608, and the elastic deformation of the flexible arc plate 608 provides a buffering effect, gradually slowing down the liquid flow and preventing the liquid from stopping instantly. This gradually reduces the liquid flow and prevents the formation of instantaneous high pressure peaks, reduces water hammer intensity, and extends the service life of the ball valve and check assembly 6.

[0033] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A ball valve with a check valve function, comprising a valve body (1), wherein a ball (2) is disposed inside the valve body (1), and a through-hole (3) is provided on the outer wall of the ball (2), characterized in that: The inner wall of the valve body (1) is provided with a check valve assembly (6), the check valve assembly (6) comprising: A limiting ring (601) is fixedly connected to the inner wall of the valve body (1). A mounting bracket (602) is fixedly connected to the end face of the limiting ring (601). A rod (603) is fixedly connected to the side wall of the mounting bracket (602). A check block (604) is sleeved on the side wall of the rod (603). A trapezoidal block (605) is fixedly connected to the end face of the check block (604). A circular groove (606) is opened at the end of the check block (604) away from the trapezoidal block (605). A connecting sleeve (607) is fixedly connected to the inner wall of the valve body (1), and a flexible arc plate (608) is fixedly connected to the inner wall of the connecting sleeve (607).

2. A ball valve with a check valve function according to claim 1, characterized in that: A valve stem (4) is fixedly connected to the outer wall of the ball (2), and a handle (5) is fixedly connected to the end of the valve stem (4) away from the ball (2). A sealing ring is fixedly connected to the inner wall of the valve body (1), and the sealing ring is movably connected to the ball (2).

3. A ball valve with a check valve function according to claim 1, characterized in that: The inner wall of the limiting ring (601) is provided with an annular groove (7), and a sealing ring (8) is fixedly connected to the inner wall of the annular groove (7). A support frame (9) is fixedly connected to the inner wall of the sealing ring (8).

4. A ball valve with a check valve function according to claim 3, characterized in that: The cross-section of the support frame (9) is arranged in a cross shape. The support frame (9) and the sealing ring (8) are made of rubber. The outer wall of the sealing ring (8) is movably connected to the outer wall of the trapezoidal block (605).

5. A ball valve with a check valve function according to claim 1, characterized in that: The number of flexible arc plates (608) is set to a certain number, and the flexible arc plates (608) are divided into three groups. The three groups of flexible arc plates (608) are arranged alternately on the inner wall of the connecting sleeve (607), and the size of the three groups of flexible arc plates (608) increases sequentially.

6. A ball valve with a check valve function according to claim 1, characterized in that: The check block (604) is frustum shaped, and the inclined surface of the check block (604) is movably connected to the inner wall of the limiting ring (601). The check block (604) has a large diameter end and a small diameter end. The large diameter end is located on the side near the sphere (2), and the small diameter end is located on the side near the flexible arc plate (608). The trapezoidal block (605) is located on one side of the large diameter end, and the circular groove (606) is located on one side of the small diameter end.

7. A ball valve with a check valve function according to claim 1, characterized in that: The trapezoidal block (605) has an isosceles trapezoidal cross-section. The lower base of the trapezoidal block (605) is fixedly connected to the side wall of the trapezoidal block (605). The side wall of the trapezoidal block (605) is movably connected to the inner wall of the through opening (3).

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