Sewage discharge ball valve

Abstract

The utility model discloses a blow-down ball valve, and belongs to the technical field of valves. The valve seat is connected with the inner wall of the valve body, the ball body abuts against the valve seat to form sealing fit, one end of the valve rod is connected with the ball body, the other end of the valve rod extends out of the valve seat, a first spring is arranged on the end face, facing the ball body, of the valve seat, and a sealing ring abuts against the portion between the first spring and the ball body. A limiting sliding ring which is in sliding connection with the sealing ring and limits the sealing ring is arranged on the inner circle face of the sealing ring, a sliding seat which is in sliding connection with the limiting sliding ring is arranged at the end, away from the ball body, of the limiting sliding ring, the sliding seat is in sliding connection with the inner wall of the valve body, and a second spring is further connected between the sliding seat and the valve body. According to the technical scheme, the ball body abrasion phenomenon caused by the fact that impurities enter the sealing face of the valve seat and the ball body in the long-term use process is improved, and the service life of the ball body is prolonged.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a drain ball valve. Background Technology

[0002] A ball valve, a type of drain valve, mainly consists of a valve body, a valve seat, a ball, and a valve stem connected to the ball. In practical applications, the sealing effect is achieved through the contact between the sealing surfaces of the valve seat and the ball. The ball, as the opening and closing element of the ball valve, is driven by the valve stem and rotates around the axis of the ball valve to regulate and control the flow of the medium inside the ball valve.

[0003] During the use of the drain ball valve, due to the impurities in the fluid medium being transported, these impurities will accumulate on the surface of the ball after prolonged use. After repeated rotations, the impurities will be carried into the sealing surface between the valve seat and the ball, scratching the ball and causing wear on the internal surface of the ball, thus affecting the sealing performance of the drain ball valve.

[0004] This application proposes a technical solution to address the issue that the surface of the ball in a drain ball valve is prone to wear during use. Utility Model Content

[0005] The purpose of this application is to provide a drain ball valve that improves the ball wear phenomenon caused by impurities entering the sealing surface between the valve seat and the ball during long-term use, thereby increasing the service life of the ball.

[0006] This application provides a sewage ball valve, which adopts the following technical solution: it includes a valve body, a valve seat connected to the inner wall of the valve body, a ball that abuts against the valve seat to form a sealing fit, and a valve stem with one end connected to the ball and the other end extending beyond the valve seat. The end face of the valve seat facing the ball is provided with a first spring, and a sealing ring abuts between the first spring and the ball. The inner circular surface of the sealing ring is provided with a limiting slip ring that is slidably connected to the sealing ring and limits the sealing ring. The end of the limiting slip ring away from the ball is provided with a sliding seat that is slidably connected to the limiting slip ring. The sliding seat is slidably connected to the inner wall of the valve body, and a second spring is also connected between the sliding seat and the valve body.

[0007] By adopting the above technical solution, a retractable sealing structure is set between the valve seat and the ball. Specifically, a first spring and a sealing ring are sequentially set on the end face of the valve seat facing the ball. Under the elastic force of the first spring, the sealing ring is pressed against the surface of the ball to achieve a sealing fit between the valve seat and the ball. Moreover, since the sealing ring is elastically connected to the valve seat through the first spring to achieve a flexible seal, the damage of impurities to the ball is reduced, resulting in a better sealing effect.

[0008] To enable the sealing ring to expand and contract at the valve seat end face, a limiting slip ring is installed on the inner circular surface of the sealing ring. The outer circular surface of the limiting slip ring clamps with the inner circular surface of the valve seat to form a telescopic groove for the sealing ring's expansion and contraction. Simultaneously, the limiting slip ring is designed to slide; when pushed to abut against the valve seat end face, the telescopic groove for the sealing ring's expansion and contraction opens inward, facilitating the installation, disassembly, and maintenance of the expandable sealing structure. After operation, when the external force on the limiting slip ring is removed, the sliding seat, in conjunction with the spring force of the second spring, pushes the limiting slip ring and valve seat to re-form the telescopic groove for the sealing ring's expansion and contraction.

[0009] Optionally, the sealing ring and the contact surface of the ball are provided with sealing protrusions.

[0010] By adopting the above technical solution, several layers of sealing protrusions are set on the abutting end face of the sealing ring to achieve multi-level sealing between the sealing ring and the ball, thereby enhancing the sealing effect of the sealing ring.

[0011] Optionally, the valve seat has a groove on the first spring extension path, and a slip ring is provided in the groove, with both ends of the slip ring abutting against the first spring and the sealing ring.

[0012] By adopting the above technical solution, multiple first springs are evenly arranged on the slip ring, and the elastic force of the first springs is evenly applied to the sealing ring, so that the sealing ring fits well with the ball, thereby enhancing the sealing effect of the ball valve.

[0013] Optionally, the limiting slip ring is provided with a first annular flange extending toward the sliding seat, and the sliding seat is provided with a first annular groove that mates with the first annular flange.

[0014] By adopting the above technical solution, the first annular flange and the first annular groove slide together, and the limiting slip ring slides smoothly under the limiting of the sliding seat. In addition, the separate limiting slip ring and sliding seat are easier to install on the inner circular surfaces of the valve body, valve seat and sealing ring.

[0015] Optionally, the sliding seat has a second annular flange extending into the valve body at one end away from the first annular groove, and the valve body has a second annular groove that slides in cooperation with the second annular flange.

[0016] By adopting the above technical solution, the sliding seat slides in the second annular groove of the valve body. With the help of the second spring connecting the sliding seat and the valve body, the sliding seat pushes the limiting slip ring and the valve seat to form a telescopic groove for the sealing ring to expand and contract.

[0017] Optionally, a filter assembly is provided at one end of the valve body inlet, and the filter assembly is connected to the valve body end face via a flange.

[0018] By adopting the above technical solution, a filter assembly capable of filtering impurities in the fluid medium is installed at one end of the valve body inlet, reducing the amount of impurities entering the sealing surface of the sphere from the source. Furthermore, the filter assembly is installed on the flange end face of the valve body via a gasket, preventing fluid leakage from the connection between the filter assembly and the valve body. Finally, the filter assembly is detachably connected to the valve body flange end face, allowing for replacement or cleaning of the filter assembly to prevent impurities from accumulating and affecting the flow of the fluid medium.

[0019] Optionally, the filter assembly includes an annular seat and a filter screen, which are connected by snaps and slots.

[0020] By adopting the above technical solution, it is convenient to disassemble and assemble the filter screen and the ring seat for cleaning or to replace the filter screen with a new one.

[0021] Optionally, the valve seat and the valve body are connected by threads.

[0022] By adopting the above technical solution, the valve seat and valve body are screwed together until their ends abut against each other.

[0023] Optionally, the ball is connected to the valve stem via a slot and a plug.

[0024] By adopting the above technical solution, the valve stem drives the ball to rotate around the valve stem axis.

[0025] Optionally, a handle is provided at one end of the valve stem other than the valve seat.

[0026] By adopting the above technical solution, the ball can be opened and closed by the handle within the range of 0° to 90°, thereby realizing the flow control and cut-off of the fluid medium.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. A retractable sealing structure, including a first spring, a slip ring, and a sealing ring, is installed between the valve seat and the ball. This allows the sealing ring to flexibly conform to the ball surface under the elastic force of the first spring, achieving a better sealing effect. Simultaneously, the flexible sealing structure reduces damage to the ball from impurities, effectively extending the ball's service life. Sealing ridges are provided on the abutting end face of the sealing ring, achieving multi-stage sealing and further enhancing the sealing effect, ensuring no leakage of the fluid medium and improving the reliability and durability of the drain ball valve.

[0029] 2. A limiting slip ring is installed on the inner circular surface of the sealing ring. Utilizing the cooperation of the sliding seat and the second spring, the limiting slip ring can extend and retract at the valve seat end face. This opens the expansion groove when the limiting slip ring is pushed, facilitating the installation, disassembly, and maintenance of the sealing structure. After operation, when the external force is removed, the limiting slip ring, pushed by the sliding seat and the second spring, re-forms the expansion groove with the valve seat, restoring the sealing structure to its normal working state. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a drain ball valve;

[0031] Figure 2 yes Figure 1 A magnified view of part a.

[0032] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. Second annular groove; 12. Flange; 2. Valve seat; 21. First spring; 22. Sealing ring; 221. Sealing ridge; 23. Slide groove; 24. Slip ring; 3. Ball; 31. Slot; 4. Valve stem; 41. Plug; 51. Limiting slip ring; 511. First annular flange; 52. Sliding seat; 521. First annular groove; 522. Second annular flange; 53. Second spring; 6. Filter assembly; 61. Annular seat; 611. Slot; 62. Filter screen; 621. Snap-on; 7. Handle. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 - Appendix Figure 2 This application will be described in further detail.

[0034] This application discloses a drain ball valve.

[0035] Combination Figure 1 As shown, a drain ball valve includes a valve body 1, a valve seat 2, a ball 3, a valve stem 4, and a handle 7. The valve seat 2 is threadedly connected to the inner wall of the valve body 1. The ball 3 abuts against the valve seat 2 to form a sealing fit. A slot 31 is opened on the upper end face of the ball 3. The valve stem 4 is inserted into the valve seat 2, and a plug 41 is provided at one end and connected to the slot 31 of the ball 3. The other end of the valve stem 4, which extends beyond the valve seat 2, is equipped with a handle 7. The handle 7 drives the ball 3 to rotate around the axis of the valve stem 4. The rotation angle is set to 0°~90°, thereby controlling the opening and closing and the flow rate of the fluid medium in the drain ball valve.

[0036] like Figure 2 As shown, a first spring 21 is provided on the end face of the valve seat 2 facing the ball 3. A sealing ring 22 abuts between the first spring 21 and the ball 3. A limiting slip ring 51 is provided on the inner circular surface of the sealing ring 22, which is slidably connected to the sealing ring 22 and limits the sealing ring 22. A sliding seat 52 is provided on the end of the limiting slip ring 51 away from the ball 3, which is slidably connected to the limiting slip ring 51. The sliding seat 52 is slidably connected to the inner wall of the valve body 1. A second spring 53 is also connected between the sliding seat 52 and the valve body 1.

[0037] By employing the above-described connection structure, a retractable sealing structure is provided between the valve seat 2 and the ball 3, such as... Figure 2As shown in one embodiment of this application, a first spring 21 and a sealing ring 22 are sequentially arranged on the end face of the valve seat 2 facing the ball 3. Under the elastic force of the first spring 21, the sealing ring 22 is pressed against the surface of the ball 3 to achieve a sealing fit between the valve seat 2 and the ball 3. Furthermore, since the sealing ring 22 is elastically connected to the valve seat 2 through the first spring 21 to achieve a flexible seal, the damage of impurities to the ball 3 is reduced, resulting in a better sealing effect.

[0038] As a further improvement to the aforementioned retractable sealing structure, such as Figure 2 As shown, several layers of sealing protrusions 221 are provided on the contact surface between the sealing ring 22 and the ball 3 to achieve multi-stage sealing between the sealing ring 22 and the ball 3, thereby enhancing the sealing effect of the sealing ring 22. Simultaneously, a groove 23 is provided on the extension path of the first spring 21 of the valve seat 2, and a slip ring 24 is provided within the groove 23. Both ends of the slip ring 24 abut against the first spring 21 and the sealing ring 22. Specifically, multiple first springs 21 are evenly arranged on the slip ring 24, and the slip ring 24 evenly distributes the elastic force of the first springs 21 onto the sealing ring 22, ensuring a good fit between the sealing ring 22 and the ball 3, thus enhancing the sealing effect of the ball valve.

[0039] To ensure smoother expansion and contraction of the sealing ring 22 at the valve seat 2 end face, a limiting slip ring 51 is provided on the inner circular surface of the sealing ring 22. The outer circular surface of the limiting slip ring 51 clamps with the inner circular surface of the valve seat 2 to form a telescopic groove for the expansion and contraction of the sealing ring 22. Simultaneously, the limiting slip ring 51 is designed to slide. When the limiting slip ring 51 is pushed to abut against the end face of the valve seat 2, the telescopic groove for the expansion and contraction of the sealing ring 22 opens inward, facilitating the installation, disassembly, and maintenance of the telescopic sealing structure formed by the first spring 21 and the sealing ring 22. After the operation is completed, the external force on the limiting slip ring 51 is removed. Under the elastic force of the sliding seat 52 and the second spring 53, the limiting slip ring 51 and the valve seat 2 re-form the telescopic groove for the expansion and contraction of the sealing ring 22.

[0040] As one embodiment of this application, such as Figure 2 As shown, the specific structure of the limiting slip ring 51 is configured such that the limiting slip ring 51 has a first annular flange 511 extending towards the sliding seat 52, and the sliding seat 52 has a first annular groove 521 that mates with the first annular flange 511. The first annular flange 511 and the first annular groove 521 slide in cooperation, and the limiting slip ring 51 slides smoothly under the limitation of the sliding seat 52, forming a telescopic groove that clamps the valve seat 2 and allows the sealing ring 22 to extend and retract. In addition, the separate configuration of the limiting slip ring 51 and the sliding seat 52 makes it easier to install on the inner circular surfaces of the valve body 1, the valve seat 2, and the sealing ring 22.

[0041] The sliding seat 52 also includes a second annular flange 522 extending towards the valve body 1 at one end away from the first annular groove 521. The valve body 1 has a second annular groove 11 that slides in conjunction with the second annular flange 522. The sliding seat 52 slides within the second annular groove 11 of the valve body 1, and with the help of the elastic force of the second spring 53 connecting the sliding seat 52 and the valve body 1, the limiting slip ring 51 can slide forward towards the ball 3 or slide backward to abut against the end face of the valve seat 2. This achieves the effect of the limiting slip ring 51 sliding forward to form a telescopic groove with the valve seat 2 for the extension and retraction of the sealing ring 22; and the telescopic groove for the extension and retraction of the sealing ring 22 opening inward on one side when sliding backward, facilitating the installation, disassembly, and maintenance of the first spring 21 and the sealing ring 22.

[0042] It should be noted that this application aims to reduce the wear on the inner surface of the ball 3 caused by impurities in the fluid medium scratching the sealing surface between the valve seat 2 and the ball 3. To address this, reducing the amount of impurities entering the valve cavity of the valve body 1 can also have a significant effect. As another embodiment of this application, such as... Figure 1 As shown, a filter assembly 6 is installed at the inlet end of the valve body 1 to filter impurities in the fluid medium, reducing the amount of impurities entering the sealing surface of the ball 3 at the source. In addition, the filter assembly 6 is detachably installed on the flange 12 end face of the valve body 1 via a gasket, preventing fluid medium leakage from the connection between the filter assembly 6 and the valve body 1. Furthermore, by replacing or cleaning the filter assembly 6, impurities can be prevented from accumulating in the filter assembly 6 and affecting the flow of the fluid medium.

[0043] To reduce the operating cost of the filter assembly 6, the above embodiment is optimized by configuring the filter assembly 6 as a detachable annular seat 61 and filter screen 62, with snap fasteners 621 and slots 611 evenly arranged on the filter screen 62 and the annular seat 61 for engagement. When the filter screen 62 becomes deformed or damaged due to prolonged use, only a new filter screen 62 needs to be replaced to re-filter impurities, thus reducing the operating cost of the filter assembly 6.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drain ball valve, characterized in that: The valve includes a valve body (1), a valve seat (2) connected to the inner wall of the valve body (1), a ball (3) that abuts against the valve seat (2) to form a sealing fit, and a valve stem (4) with one end connected to the ball (3) and the other end extending beyond the valve seat (2). The end face of the valve seat (2) facing the ball (3) is provided with a first spring (21). A sealing ring (22) abuts between the first spring (21) and the ball (3). The inner circular surface of the sealing ring (22) is provided with a limiting slip ring (51) that is slidably connected to the sealing ring (22) and limits the sealing ring (22). The end of the limiting slip ring (51) away from the ball (3) is provided with a sliding seat (52) that is slidably connected to the limiting slip ring (51). The sliding seat (52) is slidably connected to the inner wall of the valve body (1). A second spring (53) is also connected between the sliding seat (52) and the valve body (1).

2. The drain ball valve according to claim 1, characterized in that: The sealing ring (22) and the sphere (3) have a sealing protrusion (221) on their contact surfaces.

3. A drain ball valve according to claim 2, characterized in that: The valve seat (2) has a groove (23) on the extension path of the first spring (21), and a slip ring (24) is provided in the groove (23). The two ends of the slip ring (24) abut against the first spring (21) and the sealing ring (22).

4. A drain ball valve according to claim 1, characterized in that: The limiting slip ring (51) is provided with a first annular flange (511) extending toward the sliding seat (52), and the sliding seat (52) is provided with a first annular groove (521) that mates with the first annular flange (511).

5. A drain ball valve according to claim 4, characterized in that: The sliding seat (52) has a second annular flange (522) extending toward the valve body (1) at one end away from the first annular groove (521), and the valve body (1) has a second annular groove (11) that slides with the second annular flange (522).

6. A drain ball valve according to claim 1, characterized in that: The valve body (1) has a filter assembly (6) at one end of the water inlet, and the filter assembly is connected to the end face of the valve body (1) through a flange (12).

7. A drain ball valve according to claim 6, characterized in that: The filter assembly includes an annular seat (61) and a filter screen (62), which are connected by a snap fastener (621) and a slot (611).

8. A drain ball valve according to claim 1, characterized in that: The valve seat (2) and the valve body (1) are connected by threads.

9. A drain ball valve according to claim 1, characterized in that: The ball (3) is connected to the valve stem (4) via a slot (31) and a plug (41).

10. A drain ball valve according to claim 1, characterized in that: A handle (7) is provided at one end of the valve stem (4) other than the valve seat (2).

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