A type of anti-jamming floating ball valve

Abstract

This utility model relates to the field of anti-jamming ball valve technology, specifically an anti-jamming floating ball valve, including a valve body, a ball inside the valve body for controlling flow, and a movable groove for mounting a valve seat. Two sets of partitions are fixed to the inner wall of the valve body. The movable groove is located between the partitions and the valve body. A flow guide groove is formed on the outer surface of the ball, and a self-cleaning gap structure is fitted to the bottom surface of the flow guide groove. The beneficial effects are: when the valve stem is rotated, the ball rotates. Due to the spring compression of the bottom ring, the flow guide groove on the outer surface of the ball and the scraper on the valve seat are tightly fitted, as are the surface of the ball and the valve seat, improving the sealing effect between the ball and the valve seat. This ensures that the valve seat continuously applies pre-tightening force to the ball, preventing the ball from jamming due to impurities or deposits. Simultaneously, when the ball rotates, the scraper pushes out impurities along the flow guide groove. Some impurities may enter the cavity inside the ball and valve body along the flow guide groove. At this time, the baffle in the cavity guides the impurities in the flow guide groove on the rotating ball out.

Description

Technical Field

[0001] This utility model relates to the field of anti-jamming ball valves, specifically an anti-jamming floating ball valve. Background Technology

[0002] A floating ball valve consists of a stem, a ball, a seat, a body, packing, and a handle. The ball is rotated by the stem and floats slightly along the flow direction under the pressure of the medium, automatically pressing against the downstream seat to form a seal. Opening and closing rely on the rotation of the ball to control fluid flow. It has a simple and compact structure and reliable sealing. However, because the ball relies on the elasticity of the seat and fluid pressure to float and seal, when the medium contains solid impurities or easily scaled substances, these impurities can be flushed into the sealing surface between the seat and the ball or accumulate in the valve cavity. If not discharged or cleaned in time, they may jam the ball's floating or rotation, leading to opening and closing failure, thus causing the typical jamming problem of a floating ball valve.

[0003] However, existing technologies lack self-cleaning and impurity removal designs. When the medium contains solid particles, gaps can form between the valve seat and the ball after prolonged use, even with a simple valve seat. These impurities can easily enter the space between the valve seat and the ball along with the fluid, and then enter the cavity of the ball and valve body. If left untreated for a long time, the ball may become stuck due to localized jamming, resulting in increased torque or even failure to rotate. This can easily lead to sealing failure, operational difficulties, or even jamming. Utility Model Content

[0004] The purpose of this invention is to provide a floating ball valve that prevents jamming, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: it includes a valve body, a ball inside the valve body for controlling flow, a movable groove for mounting a valve seat, two sets of partitions fixed on the inner wall of the valve body, the movable groove being located between the partitions and the valve body, a flow guide groove being provided on the outer surface of the ball, and a self-cleaning gap structure being attached to the bottom surface of the flow guide groove.

[0006] Preferably, the valve seat is provided in two sets, with the valve seat located at the left and right ends of the ball.

[0007] Preferably, the partition has an annular structure, with the outer ring of the partition fitting against the inner ring of the valve seat, and the top surface of the partition not contacting the ball.

[0008] Preferably, the guide channels are vertically arrayed on the surface of the sphere, the guide channels are symmetrical about the central axis of the sphere, and the direction of the guide channels is parallel to the direction of water flow.

[0009] Preferably, the self-cleaning gap structure includes a spring, a bottom ring, a scraper, and a baffle. The spring and the bottom ring are both located in the moving groove. The bottom end of the spring is fixed to the inner bottom surface of the moving groove, and the other end of the spring is fixed to the bottom surface of the bottom ring. The top surface of the bottom ring is connected to the bottom surface of the valve seat. The scraper is fixed to the surface of the valve seat. The scraper and the valve seat are integrally formed. Multiple sets of scrapers are provided. The surface of the valve seat and the ball are in close contact. The surface of the scraper and the bottom surface of the guide groove are in close contact. The width of the scraper is equal to the width of the guide groove opening. The scraper is made of a wear-resistant material. Two sets of baffles are provided. The two sets of baffles are located on the front and rear sides of the ball, respectively. The baffles have an arc-shaped tooth structure, and the arc of the baffle is the same as the arc of the outer ring of the ball. The top of the teeth of the baffle is flat and the teeth are embedded in the guide groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The anti-jamming floating ball valve proposed in this utility model rotates the ball when the valve stem is rotated. Due to the spring pressing the bottom ring, the guide groove on the outer surface of the ball and the scraper on the valve seat are tightly fitted, as are the ball surface and the valve seat. This improves the sealing effect between the ball and the valve seat, ensuring that the valve seat continuously applies pre-tightening force to the ball and preventing the ball from jamming due to impurities or deposits. At the same time, when the ball rotates, the scraper pushes out impurities along the guide groove. Some impurities may enter the cavity inside the ball and valve body along the guide groove. At this time, the baffle in the cavity guides the impurities in the guide groove on the rotating ball out, preventing impurities from pushing out, making the ball rotate more easily and preventing jamming caused by deposits. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This utility model Figure 1 Mid-top view of the structure;

[0014] Figure 3 This utility model Figure 2 Schematic diagram of the cross-sectional structure along the middle AA direction;

[0015] Figure 4 This utility model Figure 2 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0016] Figure 5 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0017] Figure 6 This is a schematic diagram of the spherical structure of this utility model;

[0018] Figure 7 This is a schematic diagram of the structure of the ball and valve seat of this utility model;

[0019] Figure 8 This utility model Figure 7 Enlarged structural diagram at point B.

[0020] In the diagram: 1. Valve body; 2. Valve stem; 3. Ball; 4. Valve seat; 5. Baffle; 6. Moving groove; 7. Spring; 8. Bottom ring; 9. Scraper; 10. Guide groove; 11. Baffle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Example 1

[0023] Please see Figures 1-8 This utility model provides a technical solution: a floating ball valve that prevents jamming, including a valve body 1, a ball 3 inside the valve body 1 for controlling flow, two sets of valve seats 4 located at the left and right ends of the ball 3, and a movable groove 6 for installing the valve seats 4.

[0024] Specifically, refer to Figure 3 and Figure 4 The floating ball valve mainly consists of a valve body 1, a ball 3, a valve seat 4, a valve stem 2, sealing packing, and a handle. The valve body 2 provides a pressure-bearing shell for the fluid passage. The ball 3 has a through hole in the middle and can rotate around the valve stem 2. The valve seat 4 is located on both sides of the ball 3 and is continuously pressed against the ball by a back spring 7 to form a seal. The valve stem 2 connects to the top of the ball 3 and passes through the valve cover, and is externally fitted with a packing gland to prevent leakage. It is also connected to the handle for actuation. When the handle rotates, it causes the valve stem 2 to rotate, and the ball 3 rotates 90° accordingly. When the through hole is aligned with the flow channel, the medium passes through; when the through hole is perpendicular to the flow channel, it is closed. The ball automatically adheres to the downstream valve seat due to the medium pressure and the elasticity of the valve seat 4, forming a reliable seal. This achieves simple and reliable opening and closing and fluid cut-off control. The floating ball valve uses model Q41F-16C (connected via flange). Figure 3 It can be seen that the ball 3 does not have a fixed bearing at the bottom, but only has a square hole for locking at the connection with the upper end of the valve stem 2, ensuring that it can only rotate with the valve stem 2. In the axial direction, the ball 3 is "floating", and can float slightly in the flow direction by the ball 3 itself.

[0025] Example 2

[0026] Based on Embodiment 1, in order to remove dirt from the surface of the ball and prevent it from getting stuck, two sets of baffles 5 are fixed to the inner wall of the valve body 1. The baffles 5 are annular in structure, with the outer ring of the baffles 5 fitting against the inner ring of the valve seat 4. The top surface of the baffles 5 does not contact the ball 3. A moving groove 6 is located between the baffles 5 and the valve body 1. A guide groove 10 is formed on the outer surface of the ball 3. The guide grooves 10 are vertically arrayed on the surface of the ball 3 and are symmetrical about the central axis of the ball 3. The direction of the guide grooves 10 is parallel to the direction of water flow. A self-cleaning gap structure is attached to the bottom surface of the guide groove 10. The self-cleaning gap structure includes a spring 7, a bottom ring 8, a scraper 9, and a baffle 11. The spring 7 and the bottom ring 8 are both located in the moving groove 6. The bottom end is fixed to the inner bottom surface of the moving groove 6, the other end of the spring 7 is fixed to the bottom surface of the bottom ring 8, the top surface of the bottom ring 8 is connected to the bottom surface of the valve seat 4, the scraper 9 is fixed to the surface of the valve seat 4, the scraper 9 and the valve seat 4 are integrally formed, the scraper 9 is provided in multiple sets, the surface of the valve seat 4 is in close contact with the ball 3, the surface of the scraper 9 is in close contact with the bottom surface of the guide groove 10, and the width dimension of the scraper 9 is equal to the groove width dimension of the guide groove 10. The scraper 9 is made of wear-resistant material, the baffle 11 is provided in two sets, the two sets of baffle 11 are located on the front and rear sides of the ball 3 respectively, the baffle 11 has an arc-shaped tooth structure, and the arc of the baffle 11 is the same as the outer arc of the ball 3. The top of the teeth of the baffle 11 is flat-headed, and the teeth are embedded in the guide groove 10.

[0027] Specifically, when the valve stem 2 is rotated, the ball 3 is driven to rotate. Due to the spring 7 pressing the bottom ring 8, the guide groove 10 on the outer surface of the ball 3 and the scraper 9 on the valve seat 4 are tightly fitted together, as are the surfaces of the ball 3 and the valve seat 4. This improves the sealing effect between the ball 3 and the valve seat 4, ensuring that the valve seat 4 continuously applies a pre-tightening force to the ball 3, preventing the ball 3 from getting stuck due to impurities or deposits. At the same time, when the ball 3 is rotated, the scraper 9 pushes out impurities along the guide groove 10. Some impurities may enter the ball 3 and valve body 1 along the guide groove 10. Inside the cavity, the baffle 11 guides the impurities in the guide groove 10 on the rotating ball 3 out of the cavity, preventing the impurities from pushing out and making the ball 3 rotate more easily, preventing jamming caused by deposits. Both the scraper 9 and the baffle 11 are made of polytetrafluoroethylene, which has a low coefficient of friction, good self-lubrication, and excellent sealing performance. It is suitable for medium and low pressure, normal temperature, and corrosive media. Reinforced polytetrafluoroethylene can also be used, which is more resistant to high temperature, pressure, and wear. It is also suitable for fluids with light particles and easy abrasion, and can be replaced according to the application scenario.

[0028] During use, rotating the valve stem 2 causes the ball 3 to rotate. Due to the spring 7 compressing the bottom ring 8, the guide groove 10 on the outer surface of the ball 3 and the scraper 9 on the valve seat 4 are tightly fitted together, as are the surfaces of the ball 3 and the valve seat 4. This improves the sealing effect between the ball 3 and the valve seat 4, ensuring that the valve seat 4 continuously applies pre-tightening force to the ball 3, preventing the ball 3 from getting stuck due to impurities or deposits. Simultaneously, when the ball 3 is rotated, the scraper 9 pushes out impurities along the guide groove 10. Some impurities may enter the ball 3 and valve body 1 along the guide groove 10. Inside the cavity, the baffle 11 guides the impurities in the guide groove 10 on the rotating ball 3 out of the cavity, preventing the impurities from pushing out and making the ball 3 rotate more easily, preventing jamming caused by deposits. Both the scraper 9 and the baffle 11 are made of polytetrafluoroethylene, which has a low coefficient of friction, good self-lubrication, and excellent sealing performance. It is suitable for medium and low pressure, normal temperature, and corrosive media. Reinforced polytetrafluoroethylene can also be used, which is more resistant to high temperature, pressure, and wear. It is also suitable for fluids with light particles and easy abrasion, and can be replaced according to the application scenario.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A floating ball valve with anti-jamming capability, comprising a valve body (1), a ball (3) for controlling flow within the valve body (1), and a movable groove (6) for mounting a valve seat (4), characterized in that: The valve body (1) has two sets of partitions (5) fixed on its inner wall. The moving groove (6) is located between the partitions (5) and the valve body (1). The outer surface of the ball (3) is provided with a guide groove (10). The bottom surface of the guide groove (10) is fitted with a self-cleaning gap structure.

2. The anti-stuck floating ball valve according to claim 1, wherein: The valve seat (4) is provided in two sets, and the valve seat (4) is located at the left and right ends of the ball (3).

3. The anti-stuck floating ball valve according to claim 1, wherein: The partition (5) has an annular structure. The outer ring of the partition (5) fits into the inner ring of the valve seat (4), and the top surface of the partition (5) does not contact the ball (3).

4. The anti-stuck floating ball valve according to claim 1, wherein: The guide channels (10) are arranged vertically on the surface of the sphere (3). The guide channels (10) are symmetrical about the central axis of the sphere (3). The direction of the guide channels (10) is parallel to the direction of water flow.

5. The anti-stuck floating ball valve according to claim 1, wherein: The self-cleaning gap structure includes a spring (7), a bottom ring (8), a scraper (9), and a stop bar (11). The spring (7) and the bottom ring (8) are both located in the moving groove (6). The bottom end of the spring (7) is fixed to the inner bottom surface of the moving groove (6), and the other end of the spring (7) is fixed to the bottom surface of the bottom ring (8). The top surface of the bottom ring (8) is connected to the bottom surface of the valve seat (4). The scraper (9) is fixed to the surface of the valve seat (4). The scraper (9) and the valve seat (4) are integrally formed. Multiple sets of scrapers (9) are provided. The surface of the valve seat (4) and the ball (3) The scraper (9) and the bottom surface of the guide groove (10) are closely fitted. The width of the scraper (9) is equal to the width of the guide groove (10). The scraper (9) is made of wear-resistant material. There are two sets of baffles (11). The two sets of baffles (11) are located on the front and rear sides of the sphere (3). The baffles (11) have an arc-shaped tooth structure. The curvature of the baffles (11) is the same as the curvature of the outer ring of the sphere (3). The top of the teeth of the baffles (11) is flat and the teeth are embedded in the guide groove (10).

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