Ball valve with detachable filter screen

Abstract

A ball valve with a detachable filter screen comprises a valve body, a valve rod, a valve clack, a valve seat, a water inlet flow channel and a water outlet flow channel, the valve clack is arranged at the bottom of the valve rod and used for controlling connection and disconnection of the water inlet flow channel and the water outlet flow channel, the filter screen is detachably arranged in the water outlet flow channel, a connecting hole is formed in the valve body, a connecting block is arranged on the filter screen, and the connecting block is connected with the valve rod. The valve body is provided with a connecting block, the valve body is provided with a locking block matched with the connecting block, the connecting block is provided with a connecting cavity used for the locking block to stretch into, a locking rail is arranged in the connecting cavity, and the locking block is provided with a locking shaft used for being connected with the locking rail in a clamped mode to form fixed connection.

Description

Technical Field

[0001] The utility model relates to a ball valve with a detachable filter screen, belonging to the field of ball valves. Background Art

[0002] Due to their simple structure, rapid opening and closing, and excellent sealing performance, ball valves are widely used in piping systems across a variety of industries, including the petroleum, chemical, water supply and drainage, HVAC, food and pharmaceutical industries. However, in many applications, solid impurities, such as silt in water, granular carbon residue in oil lines, or tiny solid particles in chemical raw materials, are carried along with the medium flowing through the pipeline. These impurities can increase wear between the valve core and the valve seat, affecting opening and closing flexibility and sealing reliability. Furthermore, accumulation within the valve body can reduce flow, increase pressure loss, and even cause pipeline blockage. In severe cases, the system must be shut down for disassembly and cleaning, resulting in production interruptions and increased maintenance costs.

[0003] To address these issues, some researchers and companies in the industry have integrated filter screens into ball valves to trap impurities at the valve cavity entrance. For example, a cylindrical or disc-shaped filter basket is placed at the front end of the valve core or on the inner wall of the valve body, trapping solid particles via a perforated plate or mesh. While these integrated filters can filter the medium to a certain extent, they are typically integrally cast or welded to the valve body or seat, making them difficult to remove without disassembling the entire valve body. This leads to the following drawbacks:

[0004] Cleaning or replacing the filter requires shutting off the flow and removing the entire valve or multiple seals and connecting flanges, a labor-intensive and time-consuming process. Different operating conditions require varying filter pore size and material, making the fixed design difficult to flexibly replace, limiting the ball valve's widespread application across a wide range of media and pressure conditions. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a ball valve with a detachable filter screen.

[0006] A ball valve with a removable filter screen comprises a valve body, a valve stem, a valve flap, a valve seat, an inlet flow channel and an outlet flow channel, the valve flap being provided at the bottom of the valve stem for controlling the on / off of the inlet flow channel and the outlet flow channel, a removable filter screen being provided in the outlet flow channel, a connecting hole being provided on the valve body, a connecting block being provided on the filter screen, a locking block being provided on the valve body for cooperating with the connecting block, a connecting cavity being provided on the connecting block for the locking block to extend into, a locking track being provided in the connecting cavity, and a locking shaft being provided on the locking block for engaging with the locking track to form a fixed connection. Traditional ball valve filter screens are mostly integrally formed or welded with the valve body or valve seat, and when cleaning and replacing them, it is necessary to cut off the flow and disassemble the valve as a whole or disassemble multiple seals, which is labor-intensive and time-consuming. The utility model uses the engaging structure of the locking block and the connecting block so that the filter screen can be quickly removed and installed without disassembling the valve body, greatly reducing the time and labor costs required for maintenance. With the detachable filter design, filters of different pore sizes and materials can be selected according to actual needs under different working conditions (media characteristics, sand content, pressure level). Only the filter assembly needs to be replaced, without replacing the valve body or modifying the pipeline, which greatly improves the applicability of the ball valve under various operating conditions.

[0007] Preferably, the locking track includes a locking groove provided in the side wall. The locking block is rotatably connected to a first rotating wheel, which is fixedly connected to a second rotating wheel via a connecting rod. The locking shaft is provided on the second rotating wheel, and the locking shaft engages with the locking groove to securely connect the locking block to the filter. Rotating the first rotating wheel locks or releases the filter in conjunction with the second rotating wheel. Assembly and disassembly are intuitive and clear, allowing for quick filter replacement without disassembling the valve body or requiring specialized tools, making the maintenance process more standardized and reproducible.

[0008] Furthermore, the first rotating wheel is provided with a first locking groove and a second locking groove, and the locking block is provided with an elastic hook. When the locking block and the filter are in a fixed connection state, the hook is located in the first locking groove. When the locking block and the filter are released from the fixed state, the hook is hooked with the second locking groove, and is used to lift the second rotating wheel and stop it from rotating, thereby releasing the locking shaft from the locking groove and allowing the filter to be removed. When the locking block and the filter are fixed, the hook automatically falls into the first locking groove, ensuring that the rotating wheel always stays in the locked position; and when the filter needs to be removed, the hook can actively hook into the second locking groove, lifting the second rotating wheel to the unlocked position, preventing it from accidentally falling back into the locked state, avoiding accidental re-locking during maintenance, and improving operational safety.

[0009] Furthermore, the first locking groove is open and triangular in cross section, while the second locking groove is rectangular in cross section. The triangular first locking groove provides self-guiding functionality when the hook is inserted, using the inclined surfaces on both sides of the groove to guide the hook toward the centerline and securely fasten it, ensuring it remains firmly positioned even under impact from the medium. The open design also facilitates quick alignment and insertion even when concentricity is not high, simplifying assembly.

[0010] Furthermore, the inclination angle of the inner wall of the outer side of the first locking groove is larger than the inclination angle of the inner side. The inclined step converts the radial displacement of the second rotor into the rotation of the first rotor, so that when unlocking, it is only necessary to push the second rotor to slide along the unlocking groove to automatically drive the first rotor to the second locking groove position. No additional torque or tools are required, which greatly simplifies the unlocking action. The larger inclination angle on the outside can exert a stronger centripetal guiding force on the hook when the filter assembly is first inserted, so that it slides quickly into the groove; the smaller inclination angle on the inside ensures that once it enters, it is not easy to slide back out due to external force or vibration, achieving dual optimization of introduction and retention.

[0011] Furthermore, the locking track includes an unlocking slot at its bottom. An inclined step is located between the unlocking slot and the locking slot. The second wheel, via the step, drives the first wheel to rotate, causing the hook to engage with the second groove. The operator simply pushes or rotates the second wheel to the unlocking slot, automatically driving the first wheel to the unlocked position via the step. This eliminates the need for additional rotation of the first wheel or the use of tools, significantly simplifying the unlocking process. The step's optimized geometry ensures that the second wheel smoothly and precisely drives the first wheel to the predetermined angle as it passes over the step, ensuring that the elastic hook accurately engages the second locking slot, preventing incomplete unlocking or mis-locking.

[0012] Preferably, the locking block is equipped with a push block located outside the valve body. This location allows the user to manually push or rotate the block, without opening the valve cover or removing any components, to push and withdraw the locking block, significantly simplifying maintenance. The push block is exposed outside the valve body, and the current locked or unlocked state of the filter can be intuitively determined by its protruding or recessed position, improving detection efficiency and reducing the risk of misjudgment.

[0013] Furthermore, the valve body is equipped with a retaining ring surrounding the outer circumference of the connecting hole. This retaining ring tightly fits a protective cover that covers the exterior of the pusher block. The retaining ring securely positions the protective cover against the exterior of the valve body, preventing the pusher block from being accidentally triggered by unintentional contact or vibration. The pusher block can only be operated after the protective cover is opened or removed, effectively reducing the risk of misoperation. The protective cover can be combined with a sealing ring or the valve body to provide primary waterproof and dustproof protection for the locking mechanism, making it suitable for outdoor use or in harsh conditions such as damp and dusty environments, ensuring long-term stable operation.

[0014] Preferably, the valve stem extends to the outside of the valve body and is connected to a handle for rotating the valve stem.

[0015] The beneficial effects of the present invention are as follows: Traditional ball valve filters are often integrally formed or welded with the valve body or valve seat. Cleaning and replacement require shutting off the flow and disassembling the valve as a whole or disassembling multiple seals, which is labor-intensive and time-consuming. The present invention utilizes a snap-fit ​​structure between the locking block and the connecting block, allowing the filter to be quickly removed and installed without disassembling the valve body, greatly reducing the time and labor costs required for maintenance. By adopting a detachable filter design, filters of different pore sizes and materials can be selected according to actual needs under different operating conditions (media characteristics, sand content, pressure level). Only the filter assembly needs to be replaced, without replacing the valve body or modifying the pipeline, which greatly improves the applicability of the ball valve under various operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still fall within the scope of the present invention.

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

[0018] Figure 2 for Figure 1 A magnified view of the details at center A;

[0019] Figure 3 It is a schematic diagram of the structure of the locking block and other parts;

[0020] In the figure, 1. valve body; 11. connecting hole; 12. retaining ring; 13. protective cover; 2. valve stem; 3. valve disc; 4. valve seat; 5. water inlet channel; 6. water outlet channel; 7. filter; 71. connecting block; 72. connecting chamber; 73. locking track; 74. locking groove; 75. unlocking groove; 76. step; 8. locking block; 81. first rotating wheel; 82. first locking groove; 83. second locking groove; 84. connecting rod; 85. second rotating wheel; 86. locking shaft; 87. hook; 9. pushing block; 10. handle. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0022] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two non-identical entities or non-identical parameters with the same name. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. Subsequent embodiments will not explain this one by one.

[0023] The directional and positional terms used in this invention, such as "upper," "lower," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are used solely to refer to the directions or positions in the accompanying drawings. Therefore, the directional and positional terms used are intended to illustrate and facilitate understanding of this invention and are not intended to limit the scope of protection of this invention.

[0024] like Figure 1-3 The figure shows an embodiment of a ball valve with a removable filter according to the present invention, comprising a valve body 1, a valve stem 2, a valve disc 3, a valve seat 4, an inlet flow channel 5, and an outlet flow channel 6. The valve disc 3 is provided at the bottom of the valve stem 2 for controlling the opening and closing of the inlet flow channel 5 and the outlet flow channel 6. A removable filter screen 7 is provided in the outlet flow channel 6. The valve body 1 is provided with a connecting hole 11, and the filter screen 7 is provided with a connecting block 71. The valve body 1 is provided with a locking block 8 that cooperates with the connecting block 71. The connecting block 71 is provided with a connecting cavity 72 for the locking block 8 to extend into. The connecting cavity 72 is provided with a locking track 73. The locking block 8 is provided with a locking shaft 86 for engaging with the locking track 73 to form a fixed connection. Traditional ball valve filter screens 7 are often integrally formed or welded with the valve body 1 or valve seat 4. Cleaning and replacement require shutting off the flow and disassembling the valve as a whole or disassembling multiple seals, which is labor-intensive and time-consuming. The locking mechanism of the locking block 8 and the connecting block 71 allows the filter screen 7 to be quickly removed and installed without disassembling the valve body 1, significantly reducing maintenance time and labor costs. The removable filter screen 7 allows for the selection of filters of varying pore sizes and materials to meet specific operating conditions (media characteristics, sand content, and pressure level). Simply replacing the filter screen 7 assembly eliminates the need to replace the valve body 1 or modify the piping, significantly enhancing the ball valve's suitability under diverse operating conditions.

[0025] The locking track 73 includes a locking groove 74 provided on the side wall. A first rotating wheel 81 is rotatably connected to the locking block 8. The first rotating wheel 81 is fixedly connected to a second rotating wheel 85 via a connecting rod 84. A locking shaft 86 is provided on the second rotating wheel 85. The locking shaft 86 engages with the locking groove 74 to securely connect the locking block 8 to the filter screen 7. Rotating the first rotating wheel 81 can link the second rotating wheel 85 to complete locking or release. The assembly and disassembly actions are intuitive and clear, and the filter screen 7 can be quickly replaced without disassembling the valve body 1 or using special tools. The maintenance process is more standardized and replicable.

[0026] The first rotating wheel 81 is provided with a first locking groove 8274 and a second locking groove 8374. The locking block 8 is provided with an elastic hook 87. When the locking block 8 and the filter screen 7 are in a fixed connection state, the hook 87 is located in the first locking groove 8274. When the locking block 8 and the filter screen 7 are released from the fixed state, the hook 87 hooks into the second locking groove 8374, and is used to lift the second rotating wheel 85 to stop rotating, thereby releasing the locking shaft 86 from the locking groove 74, allowing the filter screen 7 to be removed. When the locking block 8 and the filter screen 7 are fixed, the hook 87 automatically falls into the first locking groove 8274, ensuring that the rotating wheel always remains in the locked position. When the filter screen 7 needs to be removed, the hook 87 can actively hook into the second locking groove 8374, lifting the second rotating wheel 85 to the unlocked position, preventing it from accidentally falling back into the locked state, avoiding accidental re-locking during maintenance, and improving operational safety.

[0027] The first locking groove 8274 is open and triangular in cross section, while the second locking groove 8374 is rectangular in cross section. The triangular first locking groove 8274 provides self-guiding functionality when the hook 87 is inserted. The inclined surfaces on both sides of the groove guide the hook 87 toward the centerline and securely fasten it, ensuring it remains securely positioned even under impact from media. The open design also facilitates quick alignment and insertion even when concentricity is poor, simplifying assembly.

[0028] The inclination angle of the outer inner wall of the first locking groove 8274 is larger than that of the inner wall. The inclined step 76 converts the radial displacement of the second rotating wheel 85 into the rotation of the first rotating wheel 81, so that when unlocking, it is only necessary to push the second rotating wheel 85 to slide along the unlocking groove 75, and the first rotating wheel 81 can be automatically driven to rotate to the second locking groove 8374 position without the need for additional torque or tools, greatly simplifying the unlocking action. The larger inclination angle on the outside can exert a stronger centripetal guiding force on the hook 87 when the filter screen 7 assembly is first inserted, so that it slides quickly into the groove; the smaller inclination angle on the inside ensures that once inserted, it is not easy to slide back out due to external force or vibration, achieving dual optimization of introduction and retention.

[0029] The locking track 73 also includes an unlocking slot 75 at its bottom. An inclined step 76 is provided between the unlocking slot 75 and the locking slot 74. The second rotating wheel 85 drives the first rotating wheel 81 via the step 76, causing the hook 87 to engage with the second groove. The operator simply pushes or rotates the second rotating wheel 85 to the unlocking slot 75. The step 76 automatically rotates the first rotating wheel 81 to the unlocked position, eliminating the need for additional rotation of the first rotating wheel 81 or the use of tools, significantly simplifying the unlocking process. The optimized geometry of the step 76 ensures that the second rotating wheel 85 smoothly and precisely drives the first rotating wheel 81 to a predetermined angle when it passes over the step 76, ensuring that the elastic hook 87 accurately engages the second locking slot 8374, preventing incomplete unlocking or mis-locking.

[0030] The locking block 8 is equipped with a push block 9 located outside the valve body 1. This location allows the user to manually push or rotate the locking block 8, without opening the valve cover or removing any components, to push and withdraw it, significantly simplifying maintenance. Since the push block 9 is exposed outside the valve body 1, the current locked or unlocked state of the filter 7 can be intuitively determined by its protruding or recessed position, improving detection efficiency and reducing the risk of misjudgment.

[0031] The valve body 1 is equipped with a retaining ring 12 surrounding the outer circumference of the connecting hole 11. This retaining ring 12 tightly fits a protective cover 13 that covers the exterior of the push block 9. The retaining ring 12 securely positions the protective cover 13 against the exterior of the valve body 1, preventing the push block 9 from being accidentally triggered by unintentional contact or vibration. The push block 9 can only be operated after the protective cover 13 is opened or removed, effectively reducing the risk of misoperation. The protective cover 13 can be combined with the retaining ring 12 or the valve body 1 to provide primary waterproof and dustproof protection for the locking mechanism, making it suitable for outdoor use or in harsh operating conditions such as damp and dusty environments, ensuring long-term stable operation.

[0032] The valve stem 2 extends to the outside of the valve body 1 and is connected to a handle 10 for rotating the valve stem 2 .

[0033] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

[0034] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed, and the present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A ball valve with a detachable filter screen, characterized in that: It includes a valve body, a valve stem, a valve disc, a valve seat, an inlet flow channel and an outlet flow channel. The valve disc is arranged at the bottom of the valve stem to control the on and off of the inlet flow channel and the outlet flow channel. A detachable filter screen is provided in the outlet flow channel. The valve body is provided with a connecting hole, and a connecting block is provided on the filter screen. The valve body is provided with a locking block that cooperates with the connecting block. The connecting block is provided with a connecting cavity for the locking block to extend into. A locking track is provided in the connecting cavity, and the locking block is provided with a locking shaft for engaging with the locking track to form a fixed connection.

2. The ball valve with a detachable filter screen according to claim 1, characterized in that: The locking track includes a locking groove provided on the side wall, the locking block is rotatably connected to the first rotating wheel, the first rotating wheel is fixedly connected to the second rotating wheel through a connecting rod, the locking shaft is provided on the second rotating wheel, and the locking shaft is fixedly connected to the locking block and the filter screen by engaging with the locking groove.

3. The ball valve with a detachable filter screen according to claim 2, characterized in that: The first rotating wheel is provided with a first locking groove and a second locking groove, and the locking block is provided with an elastic hook, which is located in the first locking groove when the locking block and the filter are in a fixed connection state, and the hook is hooked with the second locking groove when the locking block and the filter are released from the fixed state, and is used to lift the second rotating wheel so that it stops rotating, thereby releasing the locking shaft from the locking groove, so that the filter can be disassembled.

4. The ball valve with a detachable filter screen according to claim 3, characterized in that: The first locking groove is open and has a triangular cross section, and the second locking groove has a rectangular cross section.

5. The ball valve with a detachable filter screen according to claim 4, characterized in that: The inclination angle of the inner wall of the outer side of the first locking groove is larger than the inclination angle of the inner side.

6. The ball valve with a detachable filter screen according to claim 2, characterized in that: The locking track also includes an unlocking groove at the bottom, and an inclined step is provided between the unlocking groove and the locking groove, so that the second wheel drives the first wheel to rotate through the step so that the hook is hooked with the second groove.

7. The ball valve with a detachable filter screen according to claim 1, characterized in that: The locking block is provided with a pushing block located outside the valve body.

8. The ball valve with a detachable filter screen according to claim 7, characterized in that: The valve body is provided with a clamping ring surrounding the outer periphery of the connecting hole, and the clamping ring is tightly matched with a protective cover that covers the outside of the pushing block.

9. The ball valve with a detachable filter screen according to claim 1, characterized in that: The valve stem extends to the outside of the valve body and is connected to a handle for rotating the valve stem.

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