Top-mounted ball valve seat

Abstract

The invention provides a top-mounted ball valve seat, and belongs to the technical field of ball valves. The ball valve comprises a valve body and a limiting sleeve, a filtering and collecting assembly is installed in a ball body, and an early warning assembly is arranged on the filtering and collecting assembly; when the valve is opened, the impact fan blades rotate to promote medium mixing and impurity separation, the filter plate ensures that fluid is pure, the scraper blade and the soft brush bristles cooperatively clean the filter plate, the temporary storage chamber collects impurities and prevents the impurities from being mixed again, through double-face cleaning of the filter plate and timely collection and cleaning of the impurities, abrasion of the impurities to the valve seat and the ball body is reduced, and the service life of the valve is prolonged; the early warning assembly monitors the accumulation condition of impurities in the temporary storage chamber in real time through interaction of an induction column, a third spring and a trigger ball, when the rotation speed of fan blades is reduced due to accumulation of the impurities in the temporary storage chamber, cleaning reminding is automatically sent out, and the situation that due to excessive impurities, the valve is blocked or the filtering efficiency is reduced is avoided; therefore, the normal operation of the valve is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, and in particular to a top-mounted ball valve seat. Background Art

[0002] Ball valves are used to cut off or connect the medium in the pipeline, usually in hydraulic pipelines or fluid delivery pipelines. They are widely used in the petroleum, chemical, metallurgy and other industries because of their quick and easy opening and closing and strong flexibility. These industries have high requirements for the sealing, stability and reliability of valves, and the top-entry ball valve seat has become the preferred product in these industries due to its excellent performance and convenient maintenance method.

[0003] In the traditional valve seat design, although it can meet certain fluid control requirements in theory, in actual applications, especially when dealing with fluids containing tiny particles or impurities, it often exposes the following shortcomings: the wear of mechanical parts by particles and the blockage of fluid channels will lead to a decrease in the control accuracy of the valve. Even if the valve can barely work, its flow regulation and switching action may become inaccurate and unstable, and the valve needs to be maintained and parts replaced more frequently; the sealing surface between the valve seat and the ball is the key to the valve sealing performance. However, when there are particles in the fluid, these particles may be embedded in the sealing surface, causing scratches or wear, thereby affecting the sealing effect of the valve.

[0004] How to invent a top-mounted ball valve seat to solve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] In order to make up for the above shortcomings, the present invention provides a top-entry ball valve seat, aiming to solve the problems mentioned in the above background.

[0006] The present invention is achieved in that:

[0007] The present invention provides a top-mounted ball valve seat, comprising a valve body and a limit sleeve, wherein a sphere is arranged inside the valve body, a valve stem assembly is fixedly installed on the top of the sphere, the valve stem assembly is rotatably engaged with the limit sleeve, a mounting flange is arranged below the valve stem assembly, the valve stem assembly is fixedly mounted and connected to the valve body via the mounting flange, connecting flanges are arranged on the left and right sides of the valve body, side valve seats are arranged on one end of the connecting flanges on the left and right sides close to the sphere, first springs are arranged on one end of the spheres on the left and right sides away from the sphere, ends of the first springs are respectively fixedly connected to the inner wall of the valve body and the side walls of the side valve seats, a filter collecting assembly is arranged inside the sphere, the filter collecting assembly is used for filtering and collecting impurities in a medium flowing through the valve body; an early warning assembly is arranged on the filter collecting assembly, the early warning assembly is used for prompting staff to clean the filter collecting assembly.

[0008] Preferably, the upper and lower ends of the sphere are rotatably sleeved with an upper valve seat and a lower valve seat respectively, a shaft sleeve is sleeved between the lower end of the sphere and the lower valve seat, and between the upper end of the sphere and the upper valve seat, the side wall of the valve body and the interior of the lower valve seat and the upper valve seat are provided with mounting holes for fixing the lower valve seat and the upper valve seat, the lower end of the lower valve seat and the side wall of the valve body, and the upper end of the upper valve seat and the bottom of the mounting flange are elastically connected by a second spring, and elastic sealing gaskets are provided on the side walls of the lower valve seat and the upper valve seat close to the sphere.

[0009] Preferably, the filter collection assembly includes an impact blade, a filter plate and a mounting tube, the filter plate is fixedly connected to the inner cavity side wall of the sphere, one end of the impact blade close to the filter plate is fixedly connected to a rotating shaft, a limiting ring is fixedly connected to the rotating shaft, a slot matching the limiting ring is provided in the middle of the filter plate, and the end of the rotating shaft passes through the side wall of the filter plate and extends to the outside of the filter plate.

[0010] Preferably, a wiping plate is fixedly installed at the end of the rotating shaft away from the impact blade, and soft bristles are arranged on one side of the wiping plate facing the filter plate. The ends of the soft bristles are against the side wall of the filter plate, and the impact blade is arranged with an inclined light material.

[0011] Preferably, the filtering and collecting assembly also includes a plurality of scrapers, which are fixedly connected to the central axis of the impact blade and are equidistantly distributed in a ring shape along the central axis of the impact blade. A temporary storage chamber is provided inside the scraper, which is open on one side and closed on the other side. An interception hole is provided on the closed surface of the temporary storage chamber, and the end of the interception hole passes through the side wall of the scraper, and the scraper is in contact with the side wall of the filter plate.

[0012] Preferably, the scraper is located between the blades of the impact fan blade and the filter plate, the scraper is in contact with the side wall of the filter plate, and there is a gap between adjacent scrapers.

[0013] Preferably, the early warning component includes a mounting tube and an alarm, the alarm is fixedly arranged on the top of the limit sleeve, the mounting tube is fixedly connected to the side wall of the wiping plate away from the filter plate, the interior of the mounting tube is hollow, the bottom wall of the inner cavity of the mounting tube is fixedly connected with a sensing column and a third spring, and the end of the third spring is fixedly connected with a trigger ball.

[0014] Preferably, the third spring is slidably sleeved on the outside of the sensing column, the lower end of the trigger ball in the initial state abuts against the upper end of the sensing column, the sensing column is electrically connected to the alarm, and there is a gap between the trigger ball and the end of the inner cavity of the mounting tube in the initial state.

[0015] The beneficial effects of the present invention are:

[0016] When the valve is opened, the medium will flow through the ball, and its power will drive the impact blades to rotate. The rotation of the impact blades not only promotes the mixing and dispersion of the medium, but also effectively captures and pushes the impurities in the medium. These impurities are thrown to the filter plate under the action of centrifugal force, realizing the initial separation of impurities. The filter plate, as the main filtering element, blocks impurities and allows clean fluid to pass through, ensuring the purity of the fluid. At the same time, the synergistic effect of the scraper and the soft bristles realizes double-sided cleaning of the filter plate, and the impurities are effectively collected and temporarily stored in the temporary storage chamber, preventing the impurities from being mixed into the fluid again. Through the double-sided cleaning of the filter plate and the timely collection and cleaning of impurities, the wear of the valve seat and the ball by impurities is reduced, and the service life of the valve is extended.

[0017] The early warning component monitors the accumulation of impurities in the temporary storage room in real time through the interaction of the sensing column, the third spring and the trigger ball. When the accumulation of impurities in the temporary storage room causes the fan blade speed to drop, the early warning component will automatically issue a cleaning reminder, allowing the operator to understand and deal with the impurity accumulation problem in time, avoiding valve blockage or reduced filtration efficiency due to excessive impurities, thereby ensuring the normal operation of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of a top-entry ball valve seat provided in an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of a valve seat and valve body of a top-entry ball valve provided in an embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of a front cross-sectional structure of a top-entry ball valve seat provided in an embodiment of the present invention;

[0022] Figure 4 It is a schematic structural diagram of a top-entry ball valve provided by an embodiment of the present invention when the valve seat is fully opened;

[0023] Figure 5 It is a schematic structural diagram of a top-entry ball valve provided by an embodiment of the present invention when the valve seat is closed;

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of a ball body of a top-entry ball valve seat provided by an embodiment of the present invention;

[0025] Figure 7 It is a schematic front view of the cross-section of a ball body of a top-entry ball valve seat provided by an embodiment of the present invention;

[0026] Figure 8 It is a schematic structural diagram of a top-entry ball valve seat filter cleaning assembly provided in an embodiment of the present invention;

[0027] Fig. 9 It is a schematic diagram of the cross-sectional structure of a top-loading ball valve seat filter plate provided in an embodiment of the present invention.

[0028] In the figure: 1. valve body; 2. connecting flange; 3. valve stem assembly; 4. ball; 5. lower valve seat; 6. impact fan blade; 7. scraper; 8. filter plate; 9. mounting cylinder; 10. alarm; 31. limit sleeve; 32. mounting flange; 41. side valve seat; 42. first spring; 43. mounting hole; 44. bushing; 51. upper valve seat; 52. second spring; 61. rotating shaft; 62. limit ring; 63. wiper; 71. temporary storage chamber; 72. interception hole; 91. induction column; 92. third spring; 93. trigger ball. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1, refer to Figure 1-Figure 7A top mounted ball valve seat comprises a valve body 1 and a limiting sleeve 31. A ball 4 is arranged inside the valve body 1. A valve stem assembly 3 is fixedly mounted on the top of the ball 4. The valve stem assembly 3 is rotatably engaged with the limiting sleeve 31. The ball 4 can be controlled to rotate by the valve stem assembly 3, thereby controlling the on-off of the fluid. A mounting flange 32 is arranged below the valve stem assembly 3. The valve stem assembly 3 is fixedly mounted and connected to the valve body 1 through the mounting flange 32. Connecting flanges 2 are arranged on the left and right sides of the valve body 1. The connecting flanges 2 are connected to the external pipeline through the connecting flanges 2. The connecting flanges 2 on the left and right sides are close to the connecting flanges 2. A side valve seat 41 is provided at one end near the sphere 4, and a first spring 42 is provided at one end of the sphere 4 on the left and right sides away from the sphere 4. The ends of the first spring 42 are fixedly connected to the inner wall of the valve body 1 and the side wall of the side valve seat 41 respectively. The setting of the first spring 42 and the side valve seat 41 can ensure the sealing of the side of the sphere 4 when it rotates. A filter collection component is installed inside the sphere 4, and the filter collection component is used to filter and collect impurities in the medium flowing through the valve body 1; an early warning component is provided on the filter collection component, and the early warning component is used to remind the staff to clean the filter collection component.

[0031] Furthermore, the upper and lower ends of the ball 4 are rotatably sleeved with an upper valve seat 51 and a lower valve seat 5, respectively. A shaft sleeve 44 is sleeved between the lower end of the ball 4 and the lower valve seat 5, and between the upper end of the ball 4 and the upper valve seat 51. Its main function is to reduce the friction between the ball 4 and the valve seat, while maintaining the coaxiality between them to ensure the sealing effect. The side wall of the valve body 1 and the lower valve seat 5 and the upper valve seat 51 are provided with mounting holes 43 for fixing the lower valve seat 5 and the upper valve seat 51. The lower end of the lower valve seat 5 and the side wall of the valve body 1, and the upper end of the upper valve seat 51 and the bottom of the mounting flange 32 are elastically connected by a second spring 52. First, it provides additional buffering and reduces the ball 4 impact on the valve seat during closing or opening; secondly, it helps to maintain the sealing between the valve seat and the ball 4, because the elastic force of the spring can compensate for the slight deformation caused by temperature changes or pressure fluctuations; finally, it also helps to absorb vibrations and improve the overall stability and life of the valve. The side walls of the lower valve seat 5 and the upper valve seat 51 close to the ball 4 are provided with elastic sealing pads to enhance the sealing effect between the valve seat and the ball 4 and prevent fluid leakage under high pressure or high temperature conditions. The two valve seats are respectively located at the upper and lower ends of the ball 4 and are closely matched with the ball 4. Their main function is to form a sealing surface to prevent fluid leakage when the ball 4 is not completely closed.

[0032] The filter collection assembly includes an impact blade 6, a filter plate 8 and a mounting cylinder 9. The filter plate 8 is fixedly connected to the inner cavity side wall of the sphere 4. The main function of the filter plate 8 is to block impurities in the medium and only allow clean fluid to pass through. One end of the impact blade 6 close to the filter plate 8 is fixedly connected to a rotating shaft 61, and a limiting ring 62 is fixedly connected to the rotating shaft 61. A card groove matching the limiting ring 62 is provided in the middle of the filter plate 8 for fixing the rotating shaft 61 and the impact blade 6. The end of the rotating shaft 61 passes through the side wall of the filter plate 8 and extends to the outside of the filter plate 8. When the medium flows through the sphere 4, it can drive the impact blade 6 to rotate. This rotational motion not only helps to mix and disperse the medium, but also promotes the separation and collection of impurities.

[0033] It should be noted that a wiping plate 63 is fixedly installed at the end of the rotating shaft 61 away from the impact fan blade 6, and soft bristles are arranged on the side of the wiping plate 63 facing the filter plate 8, and the ends of the soft bristles are against the side walls of the filter plate 8. When the rotating shaft 61 rotates, the wiping plate 63 and the soft bristles will continuously brush the side walls of the filter plate 8 to remove impurities attached thereto, thereby ensuring the cleanliness of the filter plate 8 and preventing the accumulation of impurities that lead to a decrease in filtration efficiency or blockage. The impact fan blade 6 is set with an inclined lightweight material, which not only reduces the weight of the fan blade, but also improves its rotation efficiency. The inclined blade can more effectively capture and push impurities in the medium.

[0034] Furthermore, the filtering and collecting assembly also includes a plurality of scrapers 7, which are fixedly connected to the central axis of the impact blade 6 and are equidistantly distributed in a ring shape along the central axis of the impact blade 6. A temporary storage chamber 71 is provided inside the scraper 7, and the temporary storage chamber 71 is open on one side and closed on the other side. An interception hole 72 is provided on the closed surface of the temporary storage chamber 71, and the end of the interception hole 72 passes through the side wall of the scraper 7, and the scraper 7 is fitted with the side wall of the filter plate 8. The scraper 7 rotates with the rotating shaft 61, and can scrape off the impurities intercepted on the filter plate 8 and the impurities brushed off by the soft bristles when it rotates, and temporarily store them inside the temporary storage chamber 71, while the fluid is filtered by the interception hole 72 and flows out normally. Through the joint action of the scraper 7 and the soft bristles, the filter plate 8 can be cleaned on both sides, and the smooth circulation of the fluid can be ensured.

[0035] It should be noted that the scraper 7 is located between the blades of the impact fan 6 and the filter plate 8 to ensure that impurities can be effectively collected and scraped off. The scraper 7 fits against the side wall of the filter plate 8 to ensure that impurities can be effectively scraped off. There are gaps between adjacent scrapers 7 to ensure that the fluid can pass smoothly.

[0036] In this embodiment, when the valve stem assembly 3 is rotated, the ball 4 rotates in the valve body 1 through the rotation and engagement of the limiting sleeve 31, and the through hole on the ball 4 is aligned or staggered with the flow channel of the valve body 1, thereby controlling the on-off of the fluid.

[0037] When the ball 4 rotates to the closed position, the side valve seat 41 fits tightly against the side of the ball 4 under the action of the spring force to form a seal to prevent fluid leakage; the upper and lower ends of the ball 4 are respectively provided with an upper valve seat 51 and a lower valve seat 5, and the shaft sleeve 44 is used to reduce friction and maintain coaxiality between them. The second spring 52 provides additional buffering and sealing force. The second spring 52 not only reduces the impact of the ball 4 on the valve seat during closing or opening, but also compensates for the slight deformation caused by temperature changes or pressure fluctuations through its elastic force, maintains the sealing, and can also absorb vibrations to improve the overall stability and life of the valve.

[0038] Top-loading design: The valve stem assembly 3 is connected to the top of the valve body 1 through the mounting flange 32. This top-loading design allows the valve stem assembly 3 and the ball 4 to be directly removed from the top without disassembling the entire valve or piping system, so as to clean or replace the ball 4 and the valve seat.

[0039] The presence of the shaft sleeve 44 not only reduces the friction between the ball 4 and the valve seat, but also enables the ball 4 to slide more smoothly during disassembly. At the same time, the elastic connection design of the second spring 52 also allows a certain amount of movement space during the disassembly process, which is convenient for operation.

[0040] When the valve is opened, the medium will flow through the sphere 4, and its power will drive the impact blades 6 to rotate. The inclined design and lightweight material of the impact blades 6 not only reduce the weight, but also improve the rotation efficiency, so that the blades can more effectively capture and push impurities in the medium. The rotating impact blades 6 not only help to mix and disperse the medium, but also promote the separation of impurities. The impurities are thrown to the filter plate 8 under the action of centrifugal force, while the clean fluid continues to flow through the pores of the filter plate 8.

[0041] Filtration and cleaning of the filter plate 8: The filter plate 8 serves as the main filtering element, and its side wall blocks impurities and allows clean fluid to pass through. In order to maintain the cleanliness of the filter plate 8, a wiper plate 63 is fixedly installed at the end of the rotating shaft 61 away from the impact fan blade 6. Soft bristles are arranged on the wiper plate 63. When the rotating shaft 61 rotates, the wiper plate 63 and the soft bristles will continuously brush the side wall of the filter plate 8 to remove impurities attached thereto.

[0042] Scraping and temporary storage of the scraper 7: The scraper 7 is fixedly connected to the central axis of the impact fan blade 6 and rotates with the rotating shaft 61. During the rotation, the scraper 7 can scrape off the impurities intercepted on the filter plate 8 and the impurities brushed off by the soft brush, and temporarily store them in the temporary storage chamber 71 inside the scraper 7. The design of the temporary storage chamber 71 enables the impurities to be effectively collected, and the fluid flows out through the interception holes 72 on the closed surface of the temporary storage chamber 71. These interception holes 72 ensure the smooth flow of the fluid and prevent the re-mixing of impurities.

[0043] Double-sided cleaning and fluid circulation: Through the joint action of the scraper 7 and the soft bristles, the filter plate 8 is cleaned on both sides, that is, both the inside and outside of the filter plate 8 are effectively cleaned. This design not only improves the filtering efficiency, but also extends the service life of the filter plate 8.

[0044] In summary, the filter collection assembly achieves efficient filtration and collection of impurities in the medium through the synergistic effects of the rotation of the impact blades 6, the filtering and cleaning of the filter plate 8, and the scraping and temporary storage of the scraper 7. This design not only improves the filtering performance of the valve, but also ensures the smooth circulation of the fluid and the long-term stable operation of the valve.

[0045] Example 2, refer to Figure 6-Figure 9 The early warning component includes a mounting tube 9 and an alarm 10. The alarm 10 is fixedly arranged on the top of the limit sleeve 31, and is used to receive the signal from the sensing column 91 and issue a cleaning reminder. The mounting tube 9 is fixedly connected to the side wall of the wiping plate 63 away from the filter plate 8. The interior of the mounting tube 9 is hollow. The bottom wall of the inner cavity of the mounting tube 9 is fixedly connected with the sensing column 91 and the third spring 92. The end of the third spring 92 is fixedly connected with a trigger ball 93.

[0046] It should be noted that the third spring 92 is slidably sleeved on the outer side of the sensing column 91. In the initial state, the lower end of the trigger ball 93 is against the upper end of the sensing column 91. The sensing column 91 is electrically connected to the alarm 10. When the sensing column 91 is squeezed, a signal will be sent to the alarm 10. In the initial state, there is a gap between the trigger ball 93 and the end of the inner cavity of the mounting tube 9. In the initial state, the rotating shaft 61 is stationary. When the fluid passes through, the rotating shaft 61 will rotate with the flow of the fluid. At this time, under the action of centrifugal force, the trigger ball 93 will move away from the sensing column 91, and the third spring 92 will be in a stretched state. When a certain amount of impurities accumulates in the temporary storage chamber 71, the rotation speed of the impact fan blade 6 (rotating shaft 61) will decrease accordingly. When this centrifugal force is less than the elastic force of the third spring 92, the trigger ball 93 will contact the sensing column 91 again, and a reminder will be sent to the alarm 10, indicating that the temporary storage chamber 71 needs to be cleaned.

[0047] In this embodiment, in the initial state, the rotating shaft 61 is stationary, and the trigger ball 93 keeps in contact with the sensing column 91 under the elastic force of the third spring 92 . At this time, the alarm 10 does not send out any signal.

[0048] Fluid passing through: When the fluid passes through the sphere 4, it will drive the impact blade 6 (i.e., the rotating shaft 61) to rotate. Under the action of centrifugal force, the trigger ball 93 will move away from the sensing column 91, so that the third spring 92 is in a stretched state. At this time, the alarm 10 still does not send a signal.

[0049] Impurity accumulation: As impurities continue to accumulate in the temporary storage chamber 71, the rotation speed of the impact fan blade 6 (rotating shaft 61) will gradually decrease. This is because the impurities increase the resistance to the rotation of the fan blade. When the rotation speed of the fan blade drops to a certain level, the centrifugal force acting on the trigger ball 93 will be less than the elastic force of the third spring 92. At this time, the trigger ball 93 will contact the sensing column 91 again.

[0050] Alarm reminder: Once the trigger ball 93 contacts the sensing column 91 , the sensing column 91 will immediately send a signal to the alarm 10 . After receiving the signal, the alarm 10 will send a cleaning reminder to prompt the operator to clean the temporary storage room 71 .

[0051] Through the early warning component in Example 2, the accumulation of impurities in the temporary storage chamber 71 in the filter collection component can be monitored in real time. When the impurities accumulate to a certain extent and cause the fan blade speed to drop, the early warning component will automatically issue a cleaning reminder to ensure the filtration efficiency and normal operation of the valve. This design improves the intelligence level and maintenance convenience of the valve.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A top mounted ball valve seat, comprising a valve body (1) and a limiting sleeve (31), wherein a ball (4) is arranged inside the valve body (1), a valve stem assembly (3) is fixedly mounted on the top of the ball (4), the valve stem assembly (3) is rotatably engaged with the limiting sleeve (31), a mounting flange (32) is arranged below the valve stem assembly (3), the valve stem assembly (3) is fixedly mounted and connected to the valve body (1) via the mounting flange (32), connecting flanges (2) are arranged on the left and right sides of the valve body (1), side valve seats (41) are arranged at one end of the connecting flanges (2) on the left and right sides close to the ball (4), first springs (42) are arranged at one end of the ball (4) on the left and right sides away from the ball (4), the ends of the first springs (42) are fixedly connected to the inner wall of the valve body (1) and the side wall of the side valve seat (41), and the valve stem assembly (3) is fixedly mounted and connected to the valve body (1) via the mounting flange (32), and the valve stem assembly (3) is fixedly mounted and connected to the valve body (1) via the mounting flange (32), the valve body (1) is provided with connecting flanges (2) on the left and right sides, the connecting flanges (2) on the left and right sides close to the ball (4) are provided with side valve seats (41), and the ends of the ball (4) on the left and right sides away from the ball (4) are provided with first springs (42), the ends of the first springs (42) are fixedly connected to the inner wall of the valve body (1) and the side wall of the side valve seat (41), respectively, and the valve stem assembly (3) is fixedly mounted and connected to the valve body (1) via the mounting flange (32), and the valve stem assembly (3) is fixedly mounted and connected to the valve body (1) via the mounting flange (32), and the valve stem assembly (3) is fixedly mounted and connected to the valve body (1 A filter collection component is installed inside the sphere (4), and the filter collection component is used to filter and collect impurities in the medium flowing through the valve body (1); an early warning component is arranged on the filter collection component, and the early warning component is used to prompt the staff to clean the filter collection component.

2. A top entry ball valve seat according to claim 1, characterized in that: The upper and lower ends of the sphere (4) are rotatably sleeved with an upper valve seat (51) and a lower valve seat (5), respectively; a shaft sleeve (44) is sleeved between the lower end of the sphere (4) and the lower valve seat (5), and between the upper end of the sphere (4) and the upper valve seat (51); the side wall of the valve body (1) and the interior of the lower valve seat (5) and the upper valve seat (51) are provided with mounting holes (43) for fixing the lower valve seat (5) and the upper valve seat (51); the lower end of the lower valve seat (5) and the side wall of the valve body (1), and the upper end of the upper valve seat (51) and the bottom of the mounting flange (32) are elastically connected via a second spring (52); and the side walls of the lower valve seat (5) and the upper valve seat (51) close to the sphere (4) are provided with elastic sealing pads.

3. A top entry ball valve seat according to claim 1, characterized in that: The filter collection assembly comprises an impact blade (6), a filter plate (8) and a mounting tube (9); the filter plate (8) is fixedly connected to the inner cavity side wall of the sphere (4); one end of the impact blade (6) close to the filter plate (8) is fixedly connected to a rotating shaft (61); a limiting ring (62) is fixedly connected to the rotating shaft (61); a slot matching the limiting ring (62) is provided in the middle of the filter plate (8); and an end of the rotating shaft (61) passes through the side wall of the filter plate (8) and extends to the outside of the filter plate (8).

4. A top entry ball valve seat according to claim 3, characterized in that: A wiping plate (63) is fixedly mounted on the end of the rotating shaft (61) away from the impact blade (6), and soft bristles are arranged on one side of the wiping plate (63) facing the filter plate (8), and the ends of the soft bristles abut against the side wall of the filter plate (8). The impact blade (6) is arranged with an inclined light material.

5. The top entry ball valve seat according to claim 3, characterized in that: The filtering and collecting assembly further comprises a plurality of scrapers (7), the scrapers (7) being fixedly connected to the central axis of the impact blade (6) and being equidistantly distributed in a ring shape along the central axis of the impact blade (6), a temporary storage chamber (71) being provided inside the scraper (7), the temporary storage chamber (71) being open on one side and closed on the other side, an interception hole (72) being provided on the closed surface of the temporary storage chamber (71), the end of the interception hole (72) penetrating the side wall of the scraper (7), and the scraper (7) being in contact with the side wall of the filter plate (8).

6. A top entry ball valve seat according to claim 5, characterized in that: The scraper (7) is located between the blades of the impact fan blade (6) and the filter plate (8), the scraper (7) is in contact with the side wall of the filter plate (8), and there is a gap between adjacent scrapers (7).

7. The top entry ball valve seat according to claim 4, characterized in that: The early warning component comprises a mounting tube (9) and an alarm (10), wherein the alarm (10) is fixedly arranged on the top of the limiting sleeve (31), the mounting tube (9) is fixedly connected to the side wall of the wiping plate (63) away from the filter plate (8), the interior of the mounting tube (9) is hollow, the bottom wall of the inner cavity of the mounting tube (9) is fixedly connected to a sensing column (91) and a third spring (92), and the end of the third spring (92) is fixedly connected to a trigger ball (93).

8. The top entry ball valve seat according to claim 7, characterized in that: The third spring (92) is slidably sleeved on the outer side of the sensing column (91); in an initial state, the lower end of the trigger ball (93) abuts against the upper end of the sensing column (91); the sensing column (91) is electrically connected to the alarm (10); and in an initial state, there is a gap between the trigger ball (93) and the inner end of the mounting tube (9).

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