A metal-sealed ball valve with a flushing device

Abstract

The present invention belongs to the field of hydraulic valves, and specifically relates to a metal-sealed ball valve with a flushing device. The ball valve comprises a main valve body, a side valve body, and a ball. The main valve body is provided with a spring chamber and a valve chamber, respectively. The right side of the main valve body is connected to the side valve body, and the ball is disposed in the valve chamber between the main valve body and the side valve body. The ball valve is provided with flushing channels leading to the spring chamber and the valve chamber, respectively. Flushing oil is introduced into the flushing channels to flush the spring chamber and the valve chamber. This metal-sealed ball valve can clean and maintain the valve cavity during operation, ensuring stable and reliable operation of the valve.

Description

Technical Field

[0001] The invention belongs to the field of hydraulic valves, and in particular relates to a metal sealing ball valve with a flushing device. Background Art

[0002] When residual oil enters the valve cavity and spring chamber during the process of conveying residual oil, it is prone to coking in related parts. The spring cavity is prone to coking in the gap between the valve seat and the spring cavity, and in the spring cavity itself. The valve cavity is prone to coking in the spherical surface and the inner wall of the valve body. Valve coking will cause the valve to increase its operating torque and even cause it to fail. In this case, the valve must be shut down for maintenance, which will significantly affect the transportation of residual oil on the pipeline. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a metal-sealed ball valve with a flushing device, which can clean and maintain the valve cavity during the operation of the valve, so that the valve can be used stably and reliably.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] A metal-sealed ball valve with a flushing device, comprising a main valve body, a side valve body, and a ball; a spring chamber and a valve chamber are respectively defined in the main valve body, the right side of the main valve body is connected to the side valve body, and the ball is disposed in the valve chamber between the main valve body and the side valve body;

[0006] An upstream valve seat assembly is provided between the ball and the main valve body, and a downstream valve seat assembly is provided between the ball and the side valve body; one end of the upstream valve seat assembly is provided in the spring cavity on the main valve body, and the other end is in sealing contact with the ball; one end of the downstream valve seat assembly is connected to the side valve body, and the other end is in sealing contact with the ball;

[0007] In which, the main valve body is respectively provided with a first channel and a second channel, and the sphere is respectively provided with a third channel and a fluid channel; one end of the first channel is connected to a first flushing pipe, and the other end is communicated with the spring chamber; one end of the second channel is connected to a second flushing pipe, and the other end is communicated with the valve chamber; one end of the third channel is communicated with the valve chamber, and the other end is communicated with the fluid channel; flushing oil of a first pressure is passed into the first flushing pipe to flush the spring chamber, and flushing oil of a second pressure is passed into the second flushing pipe to flush the valve chamber.

[0008] Preferably, the upstream valve seat assembly includes an upstream valve seat and a flushing ring arranged on the outer peripheral surface of the upstream valve seat; wherein, the upstream valve seat has a first mounting section, the first mounting section is inserted into the medium channel of the main valve body, and has a gap a between it and the main valve body, the flushing ring is installed on the outer peripheral surface of the first mounting section, one end of the flushing ring is provided with a mounting positioning portion, the mounting positioning portion cooperates with the first mounting section, and the other end is provided in a mounting groove opened on the main valve body, and has a gap a between it and the outer peripheral surface of the first mounting section, and a plurality of guide holes connected with the gap a are provided on the flushing ring.

[0009] Preferably, the upstream valve seat assembly also includes a disc spring, a packing pressure ring and a sealing packing arranged in sequence on the outer circumferential surface of the upstream valve seat; the upstream valve seat also includes a second mounting section, a third mounting section and a fourth mounting section arranged in sequence; the disc spring is installed on the outer circumferential surface of the second mounting section, and the L-shaped packing pressure ring and the sealing packing are respectively installed on the outer circumferential surface of the third mounting section, one end of the sealing packing abuts against the fourth mounting section, and the other end abuts against the packing pressure ring, the disc spring is located between the flushing ring and the packing pressure ring, and its two ends respectively abut against the flushing ring and the packing pressure ring.

[0010] Preferably, the fourth mounting section is located in the spring cavity and has a gap b between it and the spring cavity, and one end of the fourth mounting section is provided with a metal sealing portion that is in sealing contact with the ball.

[0011] Preferably, the downstream valve seat assembly includes a downstream valve seat and a valve seat pressure ring, a groove is provided on the side valve body, and the valve seat pressure ring is connected to the side valve body to press and fix the downstream valve seat into the groove.

[0012] Preferably, in the axial direction, the flushing ring is closer to the upstream of the valve relative to the first channel, and the flushing ring is evenly provided with a plurality of guide holes along the circumferential direction, and the guide holes include: (1) a first guide surface close to the first channel and forming an acute angle θ with the axis of the flushing ring; (2) a second guide surface connected to the first guide surface; (3) a third guide surface away from the first channel and perpendicular to the axis of the flushing ring, thereby making the guide holes have a hole shape with a larger upper portion and a smaller lower portion.

[0013] Preferably, the guide surface is an arc-shaped guide surface facing the gap a, and the third guide surface is flush with the side surface of the spring cavity.

[0014] Preferably, the flushing ring is formed by splicing a first flushing part and a second flushing part, the first flushing part is evenly provided with a plurality of first grooves along the circumferential direction, the second flushing part is evenly provided with a plurality of second grooves along the circumferential direction, and the first grooves and the second grooves are spliced ​​to form the guide hole.

[0015] Preferably, a protrusion is formed between two adjacent first grooves, and a recess is formed between two adjacent second grooves, and the protrusion and the recess cooperate with each other to splice and position the first flushing member and the second flushing member.

[0016] Preferably, the planes where the end surfaces of both sides of the protrusion and the recess lie intersect with the axis O of the flushing ring.

[0017] Compared with the prior art, the metal-sealed ball valve with a flushing device provided by the present invention has the following beneficial technical effects:

[0018] During valve flushing maintenance, this invention introduces flushing oil into both the first and second flushing pipes to flush the ball valve's spring and valve cavities. This protects the valve and spring cavities by utilizing the pressure differential between the flushing oil and the medium, preventing the medium (residual oil) from entering. Furthermore, the flushing oil softens and dissolves coke deposits in the valve and spring cavities, discharging them through a pre-defined path. This ensures stable and reliable valve operation.

[0019] 2. The flushing device of the present invention can be cleaned online during valve operation without stopping the machine. When the valve needs maintenance, flushing oil is simply pumped into the valve cavity and spring cavity for flushing and maintenance, improving production continuity and reducing downtime losses.

[0020] 3. The present invention positions the flushing ring closer to the upstream side of the valve relative to the first channel and configures the guide hole to be larger at the top and smaller at the bottom. This hole shape accelerates the flow of flushing oil into gap a through the flushing hole, achieving more effective flushing of gap a and preventing coking in gap a. This arrangement also reduces the need for excessive flushing oil pressure P1 entering the spring chamber to meet flushing requirements, which reduces energy consumption. However, excessive flushing oil pressure P1 increases the sealing preload of the upstream valve seat, making it difficult for the ball to rotate. This arrangement ensures flushing efficiency even at low pressure P1, preventing interference with ball rotation. Furthermore, due to the smaller bottom opening area, residual oil is less likely to enter the spring chamber through gap a.

[0021] 4. The present invention arranges the first guide surface so that its distal end connects with the arcuate second guide surface, effectively directing the flushing oil within the spring cavity to gap a and enhancing the flushing effect within gap a. The third guide surface is flush with the side of the spring cavity, preventing the mounting groove from obstructing the flushing oil and ensuring effective flushing of gap a.

[0022] 5. The present invention arranges the flushing ring to be formed by splicing a first flushing part and a second flushing part, and respectively opens grooves on the first flushing part and the second flushing part to form a flushing hole. This arrangement can facilitate the processing and manufacturing of the flushing ring, and the planes where the end faces of the protrusion and the recessed part are located intersect with the axis O of the flushing ring. In this way, when the protrusion and the recessed part cooperate with each other to realize the splicing and positioning of the first flushing part and the second flushing part, the coaxial positioning accuracy between the first flushing part and the second flushing part is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of a metal-sealed ball valve;

[0024] Figure 2 for Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0025] Figure 3 It is a structural diagram of the metal sealing ball valve in the closed state;

[0026] Figure 4 Schematic diagram of the structure of the valve seat;

[0027] Figure 5 This is a schematic structural diagram of a first embodiment of a flushing ring;

[0028] Figure 6 for Figure 5 Partial cross-sectional view of the middle flushing ring;

[0029] Figure 7 It is a structural diagram of the first flushing part;

[0030] Figure 8 is a structural diagram of the second flushing member;

[0031] Figure 9 This is the main view of the first flushing part.

[0032] The meanings of the symbols in the figure are as follows:

[0033] 1. Upstream valve seat assembly; 2. Main valve body; 3. Side valve body; 4. Ball; 5. First flushing pipe; 6. Second flushing pipe; 7. Downstream valve seat assembly;

[0034] 11. Upstream valve seat; 12. Flushing ring; 13. Disc spring; 14. Packing press ring; 15. Sealing packing;

[0035] 111. First installation section; 112. Second installation section; 113. Third installation section; 114. Fourth installation section; 115. Metal sealing portion;

[0036] 121. First flushing member; 122. Second flushing member; 123. Guide hole; 124. Second groove; 125. First groove; 126. First guide surface; 127. Second guide surface; 128. Protrusion; 129. Recess; 130. Third guide surface; 131. Mounting and positioning portion;

[0037] 21. Spring chamber; 22. Valve chamber; 23. First channel; 24. Second channel; 25. Mounting groove; 26. Side of spring chamber;

[0038] 41. Third channel; 42. Fluid channel;

[0039] 71. Downstream valve seat; 72. Valve seat pressure ring. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein may be combined with each other.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0043] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use, or the orientations or positional relationships commonly understood by those skilled in the art. Such terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0044] See attached Figure 1 -Attached Figure 9 As shown, the present invention provides a metal-sealed ball valve with a flushing device, which includes a main valve body 2, a side valve body 3, and a ball 4. The main valve body 2 is provided with a spring chamber 21 and a valve chamber 22. The right side of the main valve body 2 is connected to the side valve body 3. The ball 4 is disposed in the valve chamber 22 between the main valve body 2 and the side valve body 3.

[0045] An upstream valve seat assembly 1 is disposed between the ball 4 and the main valve body 2, and a downstream valve seat assembly 7 is disposed between the ball 4 and the side valve body 3. One end of the upstream valve seat assembly 1 is disposed in the spring cavity 21 on the main valve body 2, and the other end is in sealing contact with the ball 4. One end of the downstream valve seat assembly 7 is connected to the side valve body 3, and the other end is in sealing contact with the ball 4.

[0046] Among them, a first channel 23 and a second channel 24 are respectively opened on the main valve body 2, and a third channel 41 and a fluid channel 42 are respectively opened on the ball 4; one end of the first channel 23 is connected to the first flushing pipe 5, and the other end is connected to the spring chamber 21; one end of the second channel 24 is connected to the second flushing pipe 6, and the other end is connected to the valve chamber 22; one end of the third channel 41 can be connected to the valve chamber 22, and the other end is connected to the fluid channel 42; flushing oil of the first pressure is passed into the first flushing pipe 5 to flush the spring chamber 21, and flushing oil of the second pressure is passed into the second flushing pipe 6 to flush the valve chamber 22.

[0047] Preferably, the upstream valve seat assembly 1 includes an upstream valve seat 11 and a flushing ring 12, a disc spring 13, a packing pressure ring 14 and a sealing packing 15 arranged in sequence on the outer peripheral surface of the upstream valve seat 11; the upstream valve seat 11 includes a first mounting section 111, a second mounting section 112, a third mounting section 113 and a fourth mounting section 114 arranged in sequence; the first mounting section 111 is inserted into the medium channel of the main valve body 2, and has a gap a between it and the main valve body 2, a flushing ring 12 is installed on the outer peripheral surface of the first mounting section 111, and one end of the flushing ring 12 is provided with a mounting positioning portion 131, which cooperates with the first mounting section 111, and the other end is provided in the mounting groove 25 opened on the main valve body 2, and is engaged with the first mounting section 111. There is a gap a between the outer circumferential surfaces of the first mounting section 111, and a number of guide holes 123 connected to the gap a are opened on the flushing ring 12; a disc spring 13 is installed on the outer circumferential surface of the second mounting section 112, and an L-shaped packing pressure ring 14 and a sealing packing 15 are respectively installed on the outer circumferential surface of the third mounting section 113. One end of the sealing packing 15 abuts against the fourth mounting section 114, and the other end abuts against the packing pressure ring 14. The disc spring 13 is located between the flushing ring 12 and the packing pressure ring 14, and its two ends abut against the flushing ring 12 and the packing pressure ring 14 respectively; the fourth mounting section 114 is located in the spring cavity 21, and has a gap b between it and the spring cavity 21, and one end thereof is provided with a metal sealing part 115 that is in sealing contact with the ball 4.

[0048] In the present invention, the installation positioning portion 131 of the flushing ring 12 cooperates with the upstream valve seat 11 for positioning, so that the radial gap a of the upstream valve seat 11 is always a concentric ring, so that the flushing oil is flushed evenly along the circumference of the gap a.

[0049] Preferably, the downstream valve seat assembly 7 includes a downstream valve seat 71 and a valve seat pressure ring 72 . A groove is provided on the side valve body 3 . The valve seat pressure ring 72 is connected to the side valve body 3 to press and fix the downstream valve seat 71 into the groove.

[0050] When flushing spring cavity 21, flushing oil enters spring cavity 21 through first flushing conduit 5, first passage 23, and then flows into the conduit through guide hole 123 in flushing ring 12 from gap a. During use, the flushing oil pressure P1 is set to be greater than the medium pressure P2. The pressure differential between the flushing oil and the medium protects spring cavity 21, preventing residual oil from entering spring cavity 21 and gap a.

[0051] During flushing of the valve cavity 22, both the high- and low-pressure side valve seats remain sealed. When the valve is fully open, flushing oil enters the valve cavity 22 from the second flushing pipe 6 via the second channel 24, filling the valve cavity 22 before being discharged into the pipeline via the third channel 41 and fluid channel 42. During use, the flushing oil pressure P3 is set to be greater than the medium pressure P2. The pressure differential between the flushing oil and the medium protects the valve cavity 22, preventing the medium from "backflowing" into the valve cavity 22 through the third channel 41. When the valve is fully closed, the flushing principle is similar to that of the fully open valve and will not be further elaborated here.

[0052] During the process of conveying residual oil in the valve, when the residual oil enters the valve cavity and the spring cavity, it is easy to coke on the relevant parts. The parts of the spring cavity that are easy to coke include gap a, gap b, and the spring cavity body, and the parts of the valve cavity that are easy to coke include the spherical surface, the inner wall of the valve body, etc. Coking will cause the valve to increase in actuation torque or even fail to actuate. Therefore, the present invention uses flushing oil to clean the valve cavity so that the valve can be used stably and reliably. Specifically, during the valve flushing and maintenance process, the present invention introduces flushing oil into the first flushing pipe and the second flushing pipe respectively to flush the spring cavity and valve cavity of the ball valve. On the one hand, the pressure difference between the flushing oil and the medium is used to protect the valve cavity and the spring cavity to prevent the medium (residual oil) from entering the valve cavity and the spring cavity; on the other hand, the flushing oil is used to soften and dissolve the coked materials in the valve cavity and the spring cavity, and is discharged through the set path, so that the valve can be used stably and reliably.

[0053] The flushing device of the present invention can perform online cleaning during valve operation without stopping the machine. When the valve needs maintenance, flushing oil is simply pumped into the valve cavity and spring cavity for flushing maintenance, thereby improving production continuity and reducing downtime losses.

[0054] In some preferred embodiments, in the axial direction, the flushing ring 12 is closer to the upstream of the valve relative to the first channel 23, and the flushing ring 12 is evenly provided with a plurality of guide holes 123 along the circumferential direction. The guide holes 123 include: (1) a first guide surface 126 close to the first channel 23 and having an acute angle θ with the axis of the flushing ring 12; (2) a second guide surface 127 connected to the first guide surface 126; (3) a third guide surface 130 away from the first channel 23 and perpendicular to the axis of the flushing ring 12, thereby making the guide holes 123 have a hole shape with a larger top and a smaller bottom (as shown in the attached figure). Figure 5 -Attached Figure 6 shown).

[0055] Preferably, the second guide surface 127 is an arc-shaped guide surface facing the gap a, and the third guide surface 130 is flush with the spring cavity side surface 26 .

[0056] In the above embodiment, the flushing ring is positioned closer to the upstream side of the valve relative to the first channel, and the guide hole is configured as a larger-at-top, smaller-at-bottom hole. This hole shape accelerates the flow of flushing oil into gap a through the flushing hole, achieving more effective flushing of gap a and preventing coking in gap a. This arrangement also reduces the need for excessive flushing oil pressure P1 entering the spring chamber to meet flushing requirements, which reduces energy consumption. However, excessive flushing oil pressure P1 would increase the sealing preload of the upstream valve seat, making it difficult for the ball to rotate. This arrangement ensures flushing efficiency even at low pressure P1, preventing interference with ball rotation. Furthermore, due to the smaller bottom opening area, residual oil is less likely to enter the spring chamber through gap a.

[0057] Furthermore, the first guide surface is configured so that its distal end connects to the curved second guide surface, which better directs the flushing oil within the spring cavity to gap a, enhancing the flushing effect within gap a. The third guide surface is flush with the side of the spring cavity, preventing the mounting groove from obstructing the flushing oil and ensuring a flushing effect within gap a.

[0058] Preferably, the flushing ring 12 can also adopt a second embodiment, that is, the flushing ring 12 is set in a split manner, which is composed of a first flushing part 121 and a second flushing part 122. The first flushing part 121 is evenly provided with a plurality of first grooves 125 along the circumferential direction, and the second flushing part 122 is evenly provided with a plurality of second grooves 124 along the circumferential direction. The first grooves 125 and the second grooves 124 are spliced ​​to form a guide hole 123. A protrusion 128 is formed between two adjacent first grooves 125, and a recessed part 129 is formed between two adjacent second grooves 124. The planes on which the end surfaces of the protrusions 128 and the recessed part 129 are located intersect with the axis O of the flushing ring 12 (as shown in the attached figure). Figure 9As shown in FIG, the protrusion 128 and the recess 129 cooperate with each other to splice and position the first flushing member 121 and the second flushing member 122. Of course, the first flushing member can also be provided with a recess and the second flushing member can be provided with a protrusion to achieve the splicing and positioning of the first and second flushing members. Those skilled in the art can choose according to their needs, and will not be described in detail here.

[0059] In the above embodiment, the flushing ring is configured to be spliced ​​together by a first flushing part and a second flushing part, and grooves are respectively opened on the first flushing part and the second flushing part to form a flushing hole. This configuration method can facilitate the processing and manufacturing of the flushing ring, and the planes where the end faces of the protrusion and the recessed part are located intersect with the axis O of the flushing ring. In this way, when the protrusion and the recessed part cooperate with each other to realize the splicing and positioning of the first flushing part and the second flushing part, the coaxial positioning accuracy between the first flushing part and the second flushing part is improved.

[0060] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A metal-sealed ball valve with a flushing device, characterized by: The ball valve includes a main valve body, a side valve body and a ball; the main valve body is respectively provided with a spring chamber and a valve chamber, the right side of the main valve body is connected to the side valve body, and the ball is arranged in the valve chamber between the main valve body and the side valve body; An upstream valve seat assembly is provided between the ball and the main valve body, and a downstream valve seat assembly is provided between the ball and the side valve body; one end of the upstream valve seat assembly is provided in the spring cavity on the main valve body, and the other end is in sealing contact with the ball; one end of the downstream valve seat assembly is connected to the side valve body, and the other end is in sealing contact with the ball; The main valve body is provided with a first channel and a second channel, and the ball is provided with a third channel and a fluid channel. One end of the first channel is connected to a first flushing pipe, and the other end is connected to the spring chamber. One end of the second channel is connected to a second flushing pipe, and the other end is connected to the valve chamber. One end of the third channel is connected to the valve chamber, and the other end is connected to the fluid channel. Flushing oil at a first pressure is passed into the first flushing pipe to flush the spring chamber, and flushing oil at a second pressure is passed into the second flushing pipe to flush the valve chamber. Both the first pressure and the second pressure are greater than the medium pressure. The upstream valve seat assembly includes an upstream valve seat and a flushing ring disposed on the outer circumferential surface of the upstream valve seat; wherein the upstream valve seat has a first mounting section, which is inserted into the medium passage of the main valve body and has a gap a between the first mounting section and the main valve body; the flushing ring is mounted on the outer circumferential surface of the first mounting section; one end of the flushing ring is provided with a mounting positioning portion, which cooperates with the first mounting section; the other end of the flushing ring is disposed in a mounting groove defined in the main valve body and has a gap a between the first mounting section and the outer circumferential surface; the flushing ring is provided with a plurality of guide holes communicating with the gap a; The flushing ring is closer to the upstream of the valve relative to the first channel, and the flushing ring is evenly provided with a plurality of guide holes along the circumferential direction, the guide holes including: (1) a first guide surface close to the first channel and forming an acute angle θ with the axis of the flushing ring; (2) a second guide surface connected to the first guide surface; (3) a third guide surface away from the first channel and perpendicular to the axis of the flushing ring; The second guiding surface is an arc-shaped guiding surface facing the gap a, and the third guiding surface is flush with the side surface of the spring cavity.

2. The ball valve according to claim 1, wherein: The upstream valve seat assembly also includes a disc spring, a packing pressure ring and a sealing packing which are arranged in sequence on the outer circumferential surface of the upstream valve seat; the upstream valve seat also includes a second mounting section, a third mounting section and a fourth mounting section which are arranged in sequence; a disc spring is installed on the outer circumferential surface of the second mounting section, and an L-shaped packing pressure ring and a sealing packing are respectively installed on the outer circumferential surface of the third mounting section, one end of the sealing packing abuts against the fourth mounting section, and the other end abuts against the packing pressure ring, the disc spring is located between the flushing ring and the packing pressure ring, and its two ends abut against the flushing ring and the packing pressure ring respectively.

3. The ball valve according to claim 2, wherein: The fourth installation section is located in the spring cavity and has a gap b between it and the spring cavity. One end of the fourth installation section is provided with a metal sealing portion that is in sealing contact with the ball.

4. The ball valve according to claim 3, wherein: The downstream valve seat assembly includes a downstream valve seat and a valve seat pressure ring. A groove is opened on the side valve body. The valve seat pressure ring is connected to the side valve body to press and fix the downstream valve seat into the groove.

5. The ball valve according to claim 4, characterized in that: The flushing ring is composed of a first flushing part and a second flushing part. The first flushing part is evenly provided with a plurality of first grooves along the circumferential direction, and the second flushing part is evenly provided with a plurality of second grooves along the circumferential direction. The first grooves and the second grooves are spliced ​​to form a guide hole.

6. The ball valve according to claim 5, wherein: A protrusion is formed between two adjacent first grooves, and a recess is formed between two adjacent second grooves. The protrusion and the recess cooperate with each other to splice and position the first flushing part and the second flushing part.

7. The ball valve according to claim 6, wherein: The planes where the end surfaces of both sides of the protruding portion and the recessed portion are located intersect with the axis O of the flushing ring.

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