A pigging ball valve

Abstract

This application relates to the field of pipeline cleaning, and in particular to a pigging ball valve, which includes a valve body, a valve core, a valve cover, an airbag and a sliding plate. The valve body is provided with a valve cavity, the valve core is rotatably connected to the inner wall of the valve cavity, the upper end of the valve body is provided with a pick-up and placement port, the valve core is provided with an installation port, and the installation port is used to communicate with the pick-up and placement port. The valve cover is detachably connected to the inner wall of the pick-up and placement port, and the valve cover is used to block the pick-up and placement port. The upper end of the valve cover is provided with a warning port, the nozzle of the airbag is coaxially and fixedly connected to the inner wall of the warning port, a placement groove is provided on the inner wall of the valve cover, and the placement groove communicates with the valve cavity and the warning port. The sliding plate is slidably connected to the groove wall of the placement groove. When the pressure in the valve cavity is relatively high, the pressure difference on both sides of the sliding plate causes the sliding plate to slide, and the airbag expands to remind the operator that the pressure in the pigging ball valve is too high and needs to be depressurized before opening, protecting the personal safety of the operator.

Description

Technical Field

[0001] The present application relates to the field of pipeline cleaning, and in particular to a pigging ball valve. Background Art

[0002] A pigging ball valve is a new type of valve mainly used for cleaning pipelines in long-distance pipelines such as water, oil, and natural gas. It mainly performs the operations of launching and receiving pigging tools, and is used for mechanical cleaning of the inner wall of the pipeline. It has been widely used in oil and gas fields, chemical industries, wharves, and offshore platforms, etc.

[0003] During use, the pigging tool is placed into the inner cavity of the ball of the pigging valve. When the ball channel and the pipeline channel are on the same axis, the pigging tool is launched and received by the pigging valve under the action of the fluid pressure in the pipeline. When taking or placing the pigging tool, it must be carried out when the pigging valve is closed. First, the pressure relief ball valve should be opened to relieve the pressure until the pressure in the inner cavity is exhausted; check whether there is pressure on the pressure gauge, and it is necessary to wait until the pressure on the pressure gauge is zero before proceeding to the next step; operate the handle on the quick-opening valve cover to rotate the quick-opening valve cover until the boss on the quick-opening valve cover aligns with the body stop, and then the quick-opening valve cover can be rotated to open by rotating the rotating shaft.

[0004] During daily use, the quick-opening valve cover may be accidentally opened due to factors such as operator error. Once the quick-opening valve cover is opened, the medium in the valve body will spray out, which not only affects the normal use of the ball valve but also poses a safety hazard. Summary of the Invention

[0005] In order to protect people's personal safety, the present application provides a pigging ball valve.

[0006] The pigging ball valve provided by the present application adopts the following technical solutions:

[0007] A pigging ball valve includes a valve body, a valve core, a valve cover, an airbag, and a sliding plate. The valve body is provided with a valve cavity, the valve core is rotatably connected to the inner wall of the valve cavity, the upper end of the valve body is provided with a taking and placing port, the valve core is provided with an installation port for communicating with the taking and placing port, the valve cover is detachably connected to the inner wall of the taking and placing port for blocking the taking and placing port, the upper end of the valve cover is provided with a warning port, the nozzle of the airbag is coaxially fixedly connected to the inner wall of the warning port, a placement groove is provided on the inner wall of the valve cover, the placement groove communicates with the valve cavity and the warning port, and the sliding plate is slidably connected to the groove wall of the placement groove.

[0008] By adopting the above technical solutions, when the pressure in the valve cavity is relatively high, the pressure difference on both sides of the sliding plate causes the sliding plate to slide, and the airbag expands to remind the operator that the pressure in the pigging ball valve is too high and needs to be depressurized before opening, protecting the personal safety of the operator.

[0009] Preferably, a liquid inlet is provided at one end of the valve body, and a liquid outlet is provided at the other end of the valve body, the liquid inlet and the liquid outlet are respectively provided on both sides of the valve core, the liquid inlet and the liquid outlet are both connected to the valve cavity, the axes of the liquid inlet and the liquid outlet are both horizontal, the rotation axis of the valve core is horizontal and perpendicular to the axis of the liquid inlet, the axis of the installation port is perpendicular to the rotation axis of the valve core, and the axis of the taking and releasing port is vertical.

[0010] By adopting the above technical solution, liquid enters from the liquid inlet and is discharged from the liquid outlet after passing through the installation port. The valve core rotates to control the connection between the installation port and the liquid inlet and outlet. The access port is convenient for operators to place the cleaning ball into the installation port, which is convenient for users to operate.

[0011] Preferably, the valve cover comprises a connecting sleeve and a cover plate, the outer wall of the connecting sleeve is threadedly connected to the inner wall of the access port, the cover plate is coaxially fixedly connected to the upper end of the connecting sleeve, and the cover plate is used to abut the outer wall of the valve body.

[0012] By adopting the above technical solution, the connecting sleeve is threadedly connected to the inner wall of the access port, the connection is stable and easy to disassemble, which is convenient for operators to operate and improves disassembly efficiency.

[0013] Preferably, a positioning groove is provided on the outer wall of the cover plate.

[0014] By adopting the above technical solution, the positioning groove is convenient for the user to insert the iron rod, and convenient for the user to apply force to rotate the cover plate, thereby improving the disassembly efficiency of the valve cover and facilitating the use of the user.

[0015] Preferably, it also includes a sliding column, a blocking plate and a spring, the cover plate is coaxially provided with a mounting groove at one end facing the connecting sleeve, the placement groove is arranged on the groove wall of the mounting groove, the cover plate is provided with a sliding opening, the two ends of the sliding opening are respectively connected to the placement groove and the positioning groove, the sliding column is slidably connected to the inner wall of the sliding opening, the blocking plate is slidably connected to the groove wall of the positioning groove, the two ends of the sliding column are respectively fixedly connected to the sliding plate and the blocking plate, the spring is sleeved on the outer periphery of the sliding column, one end of the spring abuts against the groove bottom of the placement groove, the other end of the spring abuts against the sliding plate, and the warning opening is arranged between the sliding plate and the groove bottom of the placement groove.

[0016] By adopting the above technical solution, when the air pressure in the valve chamber is too high, the sliding plate overcomes the spring force and slides, the space between the sliding plate and the bottom of the placement groove is reduced, the airbag expands, and the blocking plate is driven to slide through the sliding column, so that the blocking plate is close to the notch of the positioning groove, making it difficult for the iron rod to be inserted into the positioning groove, making it inconvenient for the user to remove the valve cover, and at the same time it is convenient to remind the operator that the air pressure in the valve chamber is too high.

[0017] Preferably, a warning coating is fixedly connected to one end of the blocking plate away from the sliding column.

[0018] By adopting the above technical solution, the warning coating is convenient for reminding the operator that the air pressure in the valve cavity is too high, protecting people's personal safety.

[0019] Preferably, it further includes a pressure relief pipe, a pressure relief valve and a handle. The upper end of the valve body is provided with a pressure relief port, and the pressure relief port communicates with the valve cavity. The lower end of the pressure relief pipe is coaxially and fixedly connected to the inner wall of the pressure relief port. The pressure relief valve is connected to the inner wall of the pressure relief port. The pressure relief valve is used to control the on-off of the pressure relief port. The valve rod of the pressure relief valve extends out of the pressure relief pipe, and one end of the handle is fixedly connected to the outer wall of the valve rod of the pressure relief valve.

[0020] By adopting the above technical solution, the operator holds the handle and controls the rotation of the pressure relief valve, thereby controlling the on-off of the pressure relief port, which is convenient for the user to operate.

[0021] Preferably, it further includes a screw rod, a limit block, a rotating ring and a pull rope. The lower end of the screw rod is coaxially and fixedly connected to the upper end of the cover plate. A control groove is provided on the outer wall of the screw rod. The limit block is slidably connected to the groove wall of the control groove. The rotating ring is coaxially and rotatably connected to the outer wall of the screw rod. A limit groove is provided on the inner wall of the rotating ring for the limit block to be embedded. One end of the pull rope is fixedly connected to the outer wall of the rotating ring, and the other end of the pull rope is fixedly connected to the handle.

[0022] By adopting the above technical solution, when the limit block is embedded in the limit groove, the rotation of the valve cover drives the screw rod to rotate, causing the rotating ring to rotate and wind up the pull rope, and the handle rotates to open the pressure relief valve, and the rotation of the valve cover is restricted. When the limit block is located in the control groove, the valve cover rotates normally to open.

[0023] Preferably, it further includes a push plate and a guide post. The cover plate is coaxially provided with a through hole. The lower end of the screw rod is coaxially provided with a communication port. The through hole communicates with the valve cavity and the communication port. A communication groove is provided on the inner wall of the communication port. The screw rod is provided with a guide port, and both ends of the guide port communicate with the bottom of the control groove and the bottom of the communication groove respectively. The push plate is slidably connected to the groove wall of the communication groove. Both ends of the guide post are fixedly connected to the limit block and the push plate respectively.

[0024] By adopting the above technical solution, when the pressure in the valve cavity is relatively high, the push plate moves to push the limit block into the limit groove, causing the rotating ring to rotate along with the screw rod, which is convenient for controlling the opening of the pressure relief valve and protecting the operator.

[0025] Preferably, it further includes a support column and a rotating rod. The lower end of the support column is fixedly connected to the upper end of the valve body. The axis of the support column is vertical. One end of the rotating rod is provided with a rotating hole, and the other end of the rotating rod is provided with a connection hole. The support column is coaxially and rotatably connected to the inner wall of the rotating hole. The screw rod is threadedly connected to the inner wall of the connection hole.

[0026] By adopting the above technical solution, the rotating rod guides the valve cover. When the valve cover disengages from the picking and placing port, rotating the rotating rod can move the valve cover away from the picking and placing port, facilitating the removal of the pigging ball and making it convenient for the operator to use.

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

[0028] 1. When the pressure in the valve cavity is relatively high, the pressure difference on both sides of the sliding plate causes the sliding plate to slide, and the airbag expands to remind the operator that the pressure in the pigging ball valve is too high and needs to be depressurized before opening, protecting the personal safety of the operator;

[0029] 2. When the air pressure in the valve cavity is too high, the sliding plate slides against the elastic force of the spring. The space between the sliding plate and the bottom of the placement groove decreases, and the airbag expands. The sliding column drives the blocking plate to slide, making the blocking plate close to the notch of the positioning groove, making it difficult for the iron rod to be inserted into the positioning groove, inconvenient for the user to disassemble the valve cover, and at the same time facilitating to remind the operator that the air pressure in the valve cavity is too high;

[0030] 3. When the limiting block is embedded in the limiting groove, the rotation of the valve cover drives the screw rod to rotate, causing the rotating ring to rotate and wind up the pull rope, and the handle rotates to open the pressure relief valve, and the rotation of the valve cover is restricted. When the limiting block is arranged in the control groove, the valve cover rotates and opens normally. Description of the Drawings

[0031] Figure 1 is a schematic diagram of the overall structure of a pigging ball valve.

[0032] Figure 2 is a cross-sectional view of a pigging ball valve, mainly used to show the main body and the operating parts.

[0033] Figure 3 is a cross-sectional view of a pigging ball valve, mainly used to show the valve body, valve cover, oil outlet part, warning part and protection part.

[0034] Figure 4 is Figure 3 the enlarged view of A in

[0035] Description of the reference numerals: 1. Valve body; 11. Valve cavity; 12. Operation port; 13. Liquid inlet; 14. Liquid outlet; 15. Pick-up and placement port; 16. Oil outlet; 17. Pressure relief port; 2. Main body; 21. Spool; 211. Installation port; 22. Valve stem; 23. First valve seat; 231. First valve passage; 24. Second valve seat; 241. Second valve passage; 3. Operating member; 31. Protective shell; 32. Large gear; 33. Small gear; 34. Operating shaft; 35. Operating wheel; 4. Valve cover; 41. Connecting sleeve; 42. Cover plate; 421. Positioning groove; 422. Installation groove; 423. Placing groove; 424. Sliding port; 425. Warning port; 426. Through port; 5. Oil outlet member; 51. Oil outlet pipe; 52. Oil outlet valve; 53. Control handle; 6. Pressure relief member; 61. Pressure relief pipe; 62. Pressure relief valve; 63. Handle; 7. Auxiliary member; 71. Support column; 72. Screw; 721. Communication port; 722. Communication groove; 723. Control groove; 724. Guide port; 73. Rotating rod; 731. Rotating port; 732. Connecting port; 74. Limiting plate; 8. Warning member; 81. Sliding column; 811. First sealing ring; 82. Sliding plate; 821. Second sealing ring; 83. Sealing plate; 831. Warning coating; 84. Spring; 85. Airbag; 9. Protective member; 91. Pushing plate; 911. Third sealing ring; 92. Guide post; 93. Limiting block; 94. Rotating ring; 941. Limiting groove; 95. Pulling rope; 96. Limiting ring. Detailed implementation manners

[0036] The following further elaborates on this application Figures 1-4 in conjunction with the attached drawings.

[0037] An embodiment of this application discloses a pigging ball valve. Refer to Figure 1 and Figure 2 , a pigging ball valve includes a valve body 1, a main body 2, an operating member 3, a valve cover 4, an oil outlet member 5, a pressure relief member 6, an auxiliary member 7, a warning member 8, and a protective member 9. The main body 2 includes a spool 21, a valve stem 22, a first valve seat 23, and a second valve seat 24.

[0038] Refer to Figure 2 , the valve body 1 is provided with a valve cavity 11. The spool 21 is rotatably connected to the inner wall of the valve cavity 11. The outer wall of the valve body 1 is provided with an operation port 12, and the operation port 12 communicates with the valve cavity 11. The valve stem 22 is coaxially and rotatably connected to the inner wall of the operation port 12, and one end of the valve stem 22 is fixedly connected to the spool 21. One end of the valve body 1 is provided with a liquid inlet 13, and the other end of the valve body 1 is provided with a liquid outlet 14. The liquid inlet 13 and the liquid outlet 14 are respectively arranged on both sides of the spool 21. The liquid inlet 13 and the liquid outlet 14 both communicate with the valve cavity 11. The axes of the liquid inlet 13 and the liquid outlet 14 are both horizontal, and the axis of the operation port 12 is horizontal and perpendicular to the axis of the liquid inlet 13.

[0039] Refer toFigure 3 At the upper end of the valve body 1, there is a pick-up and placement opening 15 which communicates with the valve cavity 11. The axis of the pick-up and placement opening 15 is vertical. The valve core 21 is provided with a mounting opening 211 which penetrates through the valve core 21 and is used to communicate with the pick-up and placement opening 15. The axis of the mounting opening 211 is perpendicular to the rotation axis of the valve core 21. The first valve seat 23 and the second valve seat 24 are respectively arranged on both sides of the valve core 21. Both the first valve seat 23 and the second valve seat 24 are fixedly connected to the inner wall of the valve cavity 11. The first valve seat 23 seals the liquid inlet 13, and the second valve seat 24 seals the liquid outlet 14. The first valve seat 23 is provided with a first valve passage 231 which communicates the liquid inlet 13 and the valve cavity 11. The second valve seat 24 is provided with a second valve passage 241 which communicates the liquid outlet 14 and the valve cavity 11. Both the first valve seat 23 and the second valve seat 24 are used to abut against the valve core 21.

[0040] Refer to Figure 2 The operating member 3 includes a protective shell 31, a large gear 32, a small gear 33, an operating shaft 34 and an operating wheel 35. The protective shell 31 covers the outer periphery of the valve rod 22 and is fixedly connected to the outer wall of the valve body 1. Both the large gear 32 and the small gear 33 are arranged inside the protective cover. The large gear 32 is coaxially and fixedly connected to the outer wall of the valve rod 22. The operating shaft 34 is rotatably connected to the protective shell 31 around its own axis. The rotation axis of the operating shaft 34 is parallel to the axis of the valve rod 22. One end of the operating shaft 34 extends into the protective shell 31. The small gear 33 is coaxially and fixedly connected to the outer wall of the operating shaft 34. The large gear 32 meshes with the small gear 33. The operating wheel 35 is arranged on the side of the protective shell 31 away from the valve body 1 and is coaxially and fixedly connected to the outer wall of the operating shaft 34.

[0041] Refer to Figure 3 The valve cover 4 is used to seal the pick-up and placement opening 15. The valve cover 4 includes a connecting sleeve 41 and a cover plate 42. The outer wall of the connecting sleeve 41 is threadedly connected to the inner wall of the pick-up and placement opening 15. The cover plate 42 is coaxially and fixedly connected to the upper end of the connecting sleeve 41 and is used to abut against the outer wall of the valve body 1. The outer wall of the cover plate 42 is provided with a positioning groove 421. There are multiple positioning grooves 421 which are evenly spaced around the axis of the cover plate 42.

[0042] The oil outlet member 5 includes an oil outlet pipe 51, an oil outlet valve 52 and a control handle 53. At the lower end of the valve body 1, there is an oil outlet 16 which communicates with the valve cavity 11. The axis of the oil outlet 16 is vertical. The upper end of the oil outlet pipe 51 is coaxially and fixedly connected to the inner wall of the oil outlet 16. The oil outlet valve 52 is coaxially rotatably connected to the inner wall of the oil outlet 16 and is used to control the on-off of the oil outlet 16. The oil outlet valve 52 is a ball valve. The rotation axis of the oil outlet valve 52 is horizontal. The valve rod 22 of the oil outlet valve 52 extends out of the oil outlet pipe 51. One end of the control handle 53 is fixedly connected to the outer wall of the valve rod 22 of the oil outlet valve 52.

[0043] Reference Figure 1 and Figure 3 As shown in FIGS. 1 and 2, the pressure relief member 6 includes a pressure relief pipe 61, a pressure relief valve 62 and a handle 63. The upper end of the valve body 1 is provided with a pressure relief port 17. The pressure relief port 17 is arranged on the outer periphery of the access port 15 and communicates with the valve cavity 11. The lower end of the pressure relief pipe 61 is coaxially and fixedly connected to the inner wall of the pressure relief port 17. The opening at one end of the pressure relief pipe 61 away from the pressure relief port 17 faces away from the valve cover 4. The pressure relief valve 62 is connected to the inner wall of the pressure relief port 17 and is used to control the on-off of the pressure relief port 17. The pressure relief valve 62 is set as a ball valve. The rotation axis of the pressure relief valve 62 is horizontal. The valve stem 22 of the pressure relief valve 62 extends out of the pressure relief pipe 61. One end of the handle 63 is fixedly connected to the outer wall of the valve stem 22 of the pressure relief valve 62.

[0044] The auxiliary member 7 includes a support column 71, a screw rod 72, a rotating rod 73 and a limiting plate 74. The lower end of the support column 71 is fixedly connected to the upper end of the valve body 1. The axis of the support column 71 is vertical. The lower end of the screw rod 72 is coaxially and fixedly connected to the upper end of the cover plate 42. One end of the rotating rod 73 is provided with a rotating opening 731, and the other end of the rotating rod 73 is provided with a connecting opening 732. The support column 71 is coaxially and rotatably connected to the inner wall of the rotating opening 731. The screw rod 72 is threadedly connected to the inner wall of the connecting opening 732. The limiting plate 74 is coaxially and fixedly connected to the outer wall of the support column 71. There are two limiting plates 74, which are respectively arranged on the upper and lower sides of the rotating rod 73. The limiting plate 74 abuts against the rotating rod 73 to limit the rotating rod 73.

[0045] Reference Figure 4The warning member 8 includes a sliding column 81, a sliding plate 82, a blocking plate 83, a spring 84 and an airbag 85. A mounting groove 422 is coaxially provided at one end of the cover plate 42 facing the connecting sleeve 41. The diameter of the mounting groove 422 is smaller than the inner diameter of the connecting sleeve 41. A placement groove 423 is provided on the groove wall of the mounting groove 422. There are multiple placement grooves 423. The placement grooves 423 are arranged in a one-to-one correspondence with the positioning grooves 421. The cover plate 42 is provided with a sliding opening 424. The axis of the sliding opening 424 is along the radial direction of the cover plate 42. The two ends of the sliding opening 424 are respectively connected to the placement groove 423 and the positioning groove 421. The sliding column 81 is slidably connected to the inner wall of the sliding opening 424. The sliding plate 82 is slidably connected to the groove wall of the placement groove 423. The blocking plate 83 is slidably connected to the groove wall of the positioning groove 421. The two ends of the sliding column 81 They are respectively fixedly connected to the sliding plate 82 and the sealing plate 83, the outer wall of the sliding column 81 is fixedly connected with the first sealing ring 811, the outer wall of the sliding plate 82 is fixedly connected with the second sealing ring 821, the spring 84 is sleeved on the outer periphery of the sliding column 81, one end of the spring 84 abuts the bottom of the placement groove 423, and the other end of the spring 84 abuts the sliding plate 82, and the upper end of the cover plate 42 is provided with a warning port 425, the warning port 425 is arranged between the sliding plate 82 and the bottom of the placement groove 423, the warning port 425 is connected to the placement groove 423, the bag mouth of the airbag 85 is coaxially fixedly connected to the inner wall of the warning port 425, and the end of the sealing plate 83 away from the sliding column 81 is fixedly connected with the warning coating 831.

[0046] Reference Figure 1 and Figure 3, the protection member 9 includes a push plate 91, a guide post 92, a limit block 93, a rotating ring 94, a pull rope 95, a limit ring 96, and a compression spring 97. A through hole 426 is coaxially provided at the bottom of the installation groove 422, and a communication port 721 is coaxially provided at the lower end of the screw rod 72. The diameter of the through hole 426 is equal to the diameter of the communication port 721. The through hole 426 communicates with the valve cavity 11 and the communication port 721. A communication groove 722 is provided on the inner wall of the communication port 721, a control groove 723 is provided on the outer wall of the screw rod 72, and a guide port 724 is provided on the screw rod 72. The two ends of the guide port 724 communicate with the bottom of the control groove 723 and the bottom of the communication groove 722 respectively. The push plate 91 is slidably connected to the groove wall of the communication groove 722, and a third sealing ring 911 is fixedly connected to the outer wall of the push plate 91. The guide post 92 is slidably connected to the inner wall of the guide port 724, the limit block 93 is slidably connected to the groove wall of the control groove 723, and the two ends of the guide post 92 are respectively fixedly connected to the limit block 93 and the push plate 91. The rotating ring 94 is coaxially and rotatably connected to the outer wall of the screw rod 72, and a limit groove 941 is provided on the inner wall of the rotating ring 94 for the limit block 93 to be embedded. One end of the pull rope 95 is fixedly connected to the outer wall of the rotating ring 94, and the other end of the pull rope 95 is fixedly connected to the end of the handle 63 away from the valve stem 22 of the pressure relief valve 62. The limit ring 96 is provided between the rotating ring 94 and the pressure relief valve 62, and the limit ring 96 is fixedly connected to the upper end of the valve body 1. The pull rope 95 passes through the limit ring 96. The compression spring 97 is provided in the communication groove 722, the compression spring 97 is sleeved on the outer periphery of the guide post 92, and the two ends of the compression spring 97 respectively abut against the bottom of the communication groove 722 and the push plate 91.

[0047] The implementation principle of a pigging ball valve in an embodiment of the present application is as follows: When the air pressure in the valve cavity 11 is too high, the sliding plate 82 slides against the elastic force of the spring 84, the space between the sliding plate 82 and the bottom of the placement groove 423 decreases, the airbag 85 expands, drives the plugging plate 83 to slide through the sliding column 81, so that the plugging plate 83 approaches the notch of the positioning groove 421, making it difficult for the iron rod to be inserted into the positioning groove 421, and it is inconvenient for the user to disassemble the valve cover 4, which is convenient for reminding the operator that the air pressure in the valve cavity 11 is too high. When the user continues to operate despite the reminder, when the limit block 93 is embedded in the limit groove 941, the rotation of the valve cover 4 drives the screw rod 72 to rotate, so that the rotating ring 94 rotates to wind up the pull rope 95, and the handle 63 rotates to open the pressure relief valve 62, and the rotation of the valve cover 4 is restricted.

[0048] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A pigging ball valve, characterized in that: The invention comprises a valve body (1), a valve core (21), a valve cover (4), an air bag (85) and a sliding plate (82), wherein the valve body (1) is provided with a valve cavity (11), the valve core (21) is rotatably connected to the inner wall of the valve cavity (11), the upper end of the valve body (1) is provided with a take-in and take-out port (15), the valve core (21) is provided with a mounting port (211), the mounting port (211) is used to communicate with the take-in and take-out port (15), and the valve cover (4) is detachably connected to the take-in and take-out port The valve cover (4) is used to block the access opening (15), the upper end of the valve cover (4) is provided with a warning opening (425), the bag mouth of the air bag (85) is coaxially fixedly connected to the inner wall of the warning opening (425), the inner wall of the valve cover (4) is provided with a placement groove (423), the placement groove (423) is connected to the valve cavity (11) and the warning opening (425), and the sliding plate (82) is slidably connected to the groove wall of the placement groove (423); A liquid inlet (13) is provided at one end of the valve body (1), and a liquid outlet (14) is provided at the other end of the valve body (1); the liquid inlet (13) and the liquid outlet (14) are respectively provided on two sides of the valve core (21); the liquid inlet (13) and the liquid outlet (14) are both connected to the valve cavity (11); the axes of the liquid inlet (13) and the liquid outlet (14) are both horizontal; the rotation axis of the valve core (21) is horizontal and perpendicular to the axis of the liquid inlet (13); the axis of the installation port (211) is perpendicular to the rotation axis of the valve core (21); and the axis of the access port (15) is vertical; The valve cover (4) comprises a connecting sleeve (41) and a cover plate (42); the outer wall of the connecting sleeve (41) is threadedly connected to the inner wall of the access opening (15); the cover plate (42) is coaxially fixedly connected to the upper end of the connecting sleeve (41); and the cover plate (42) is used to abut against the outer wall of the valve body (1); The outer wall of the cover plate (42) is provided with a positioning groove (421); The cover plate (42) further comprises a sliding column (81), a blocking plate (83) and a spring (84); a mounting groove (422) is coaxially provided at one end of the cover plate (42) facing the connecting sleeve (41); the placement groove (423) is provided on the groove wall of the mounting groove (422); the cover plate (42) is provided with a sliding opening (424); two ends of the sliding opening (424) are respectively connected to the placement groove (423) and the positioning groove (421); the sliding column (81) is slidably connected to the inner wall of the sliding opening (424). The blocking plate (83) is slidably connected to the groove wall of the positioning groove (421); the two ends of the sliding column (81) are respectively fixedly connected to the sliding plate (82) and the blocking plate (83); the spring (84) is sleeved on the outer periphery of the sliding column (81); one end of the spring (84) abuts against the groove bottom of the placement groove (423); the other end of the spring (84) abuts against the sliding plate (82); and the warning port (425) is provided between the sliding plate (82) and the groove bottom of the placement groove (423).

2. The pigging ball valve according to claim 1, wherein: One end of the blocking plate (83) facing away from the sliding column (81) is fixedly connected to a warning coating (831).

3. The pigging ball valve according to claim 1, characterized in that: It further includes a pressure relief pipe (61), a pressure relief valve (62) and a handle (63). The upper end of the valve body (1) is provided with a pressure relief port (17), and the pressure relief port (17) communicates with the valve cavity (11). The lower end of the pressure relief pipe (61) is coaxially and fixedly connected to the inner wall of the pressure relief port (17). The pressure relief valve (62) is connected to the inner wall of the pressure relief port (17), and the pressure relief valve (62) is used to control the on-off of the pressure relief port (17). The valve stem (22) of the pressure relief valve (62) extends out of the pressure relief pipe (61), and one end of the handle (63) is fixedly connected to the outer wall of the valve stem (22) of the pressure relief valve (62).

4. The pigging ball valve according to claim 3, characterized in that: It further includes a screw rod (72), a limit block (93), a rotating ring (94) and a pull rope (95). The lower end of the screw rod (72) is coaxially and fixedly connected to the upper end of the cover plate (42). A control groove (723) is provided on the outer wall of the screw rod (72). The limit block (93) is slidably connected to the groove wall of the control groove (723). The rotating ring (94) is coaxially and rotatably connected to the outer wall of the screw rod (72). A limit groove (941) is provided on the inner wall of the rotating ring (94), and the limit groove (941) is used for the limit block (93) to be embedded. One end of the pull rope (95) is fixedly connected to the outer wall of the rotating ring (94), and the other end of the pull rope (95) is fixedly connected to the handle (63).

5. A pigging ball valve according to claim 4, characterized in that: It further includes a push plate (91) and a guide post (92). The cover plate (42) is coaxially provided with a through hole (426). The lower end of the screw rod (72) is coaxially provided with a communication port (721). The through hole (426) communicates with the valve cavity (11) and the communication port (721). A communication groove (722) is provided on the inner wall of the communication port (721). The screw rod (72) is provided with a guide port (724), and the two ends of the guide port (724) are respectively communicated with the bottom of the control groove (723) and the bottom of the communication groove (722). The push plate (91) is slidably connected to the groove wall of the communication groove (722). The two ends of the guide post (92) are respectively fixedly connected to the limit block (93) and the push plate (91).

6. The pigging ball valve according to claim 4, wherein: It further includes a support column (71) and a rotating rod (73). The lower end of the support column (71) is fixedly connected to the upper end of the valve body (1), and the axis of the support column (71) is vertical. One end of the rotating rod (73) is provided with a rotating hole (731), and the other end of the rotating rod (73) is provided with a connection port (732). The support column (71) is coaxially and rotatably connected to the inner wall of the rotating hole (731). The screw rod (72) is threadedly connected to the inner wall of the connection port (732).

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