CN212718142U

CN212718142U - Flange ball valve

Info

Publication number: CN212718142U
Application number: CN202021528871.8U
Authority: CN
Inventors: 吴政; 赵南平
Original assignee: Shanghai Kaite Valve Manufacture Co ltd
Current assignee: Shanghai Kaite Valve Manufacture Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-03-16
Anticipated expiration: 2030-07-29

Abstract

The utility model relates to a flange ball valve, which comprises a valve body, the fixed ring flange that is provided with on the double-phase lateral wall of valve body, be provided with the valve gap on the lateral wall of valve body, be provided with first opening on the valve gap, be provided with the second opening on the lateral wall of valve body, be provided with the cavity in the valve body, first opening is linked together with the cavity, the second opening is linked together with the cavity, be provided with the case in the cavity, the inside runner through-hole that is provided with of case, the one end of valve body is provided with the brace table, wear to be equipped with the valve rod in the brace table, the valve rod can be dismantled with the case and be connected, the pot head of valve rod is equipped with the handle, the one end of valve rod is provided with the fastener, the week side of valve gap and cavity is provided with first shell. This application has the effect that reduces the leakage volume between disk seat and the case.

Description

Flange ball valve

Technical Field

The utility model belongs to the technical field of pipeline valve and specifically relates to a flange ball valve is related to.

Background

The ball valve, the opening and closing piece (ball) is driven by the valve rod and rotates around the axis of the ball valve. The hard seal V-shaped ball valve can also be used for regulating and controlling fluid, wherein a V-shaped ball core of the hard seal V-shaped ball valve and a metal valve seat of the build-up welding hard alloy have strong shearing force, and the hard seal V-shaped ball valve is particularly suitable for media containing fibers, tiny solid particles and the like.

The utility model discloses a ball valve in the chinese utility model with publication number CN204328055U, wherein, including a first valve seat, a second valve seat, a valve rod, a ball valve and a sealing element, the first valve seat and the second valve seat are movably mounted, the sealing element is in the sealing gap between the first valve seat and the second valve seat, the ball valve is in the first valve seat and the second valve seat, the valve rod is between the first valve seat and the second valve seat to control the rotation of the ball valve; the ball valve comprises a central ball groove, a first through hole, a second through hole and a third through hole, the central ball groove is located in the center of the ball valve, and the central axes of the first through hole, the second through hole and the third through hole are located on the same horizontal plane and penetrate through the ball valve to be communicated with the central ball groove.

In the related art described above, the inventors have considered that there is a drawback that leakage is liable to occur between the valve seat and the valve body.

SUMMERY OF THE UTILITY MODEL

In order to reduce the leakage quantity between disk seat and the case, this application provides a flange ball valve.

The application provides a flange ball valve adopts following technical scheme:

a flange ball valve comprises a valve body, wherein flange plates are fixedly arranged on two opposite side walls of the valve body, a valve cover is detachably arranged on the side walls of the valve body, a first through hole is formed in the valve cover, a second through hole is formed in the side wall of the valve body opposite to the valve cover, a cavity is formed in the valve body, the first through hole is communicated with the cavity, the second through hole is communicated with the cavity, a valve core is rotatably arranged in the cavity, a flow passage through hole is formed in the valve core, a supporting table is fixedly arranged at one end, far away from the cavity, of the valve body, a valve rod penetrates through the supporting table in a rotating mode, one end, far away from the supporting table, of the valve rod is detachably connected with the valve core, a handle used for rotating the valve rod is sleeved at one end, the valve gap is close to the week side of case at first opening with the cavity is provided with the storage tank in the week side that the second opening is close to the case, be provided with first shell fragment and the second shell fragment that is in compression state in the storage tank, the lateral wall butt of first shell fragment and storage tank, the lateral wall that the case was kept away from to the second shell fragment is close to the lateral wall looks butt of case with first shell fragment, the one end that first shell fragment was kept away from at the second shell fragment in the storage tank is provided with the disk seat, the lateral wall that the storage tank was kept away from to the disk seat slides the butt with the case, the lateral wall looks butt that the case was kept away from to the one.

By adopting the technical scheme, when the valve body is arranged on the pipeline through the flange plate, the first port and the second port are communicated with the pipeline, the handle is rotated, the handle drives the valve rod to rotate in the valve body, the valve rod drives the valve core to rotate in the cavity, and when the flow passage through hole rotates to the position communicated with the first port and the second port, a medium in the pipeline can be communicated in the pipeline through the valve body; when the handle is rotated reversely, the valve core rotates to the position for plugging the first through hole and the second through hole, the pipeline is in a cut-off state, the medium in the pipeline is plugged, and the medium cannot flow in the pipeline through the valve body. When the valve core rotates to the position for plugging the first through hole and the second through hole, the first elastic sheet supports the second elastic sheet tightly on the valve seat through the elastic restoring force of the first elastic sheet, and the second elastic sheet supports the valve seat tightly on the outer side wall of the valve core through the elastic restoring force of the second elastic sheet. So set up, be favorable to reducing the gap between disk seat and the case to the leakage quantity between disk seat and the case has been reduced.

Preferably, the side wall of the chamber close to the valve cover is provided with a flange, the side wall of the flange far away from the valve core is provided with a gasket, and the side wall of the valve cover close to the valve core is abutted to the gasket.

Through adopting above-mentioned technical scheme, when the installation valve gap, the packing ring can provide the buffering to the valve gap, reduces the valve gap when the installation to the pressure of disk seat, and then reduces the disk seat to the pressure of case, prevents that the disk seat from excessively extrudeing the case and leading to the case to rotate the difficulty, is favorable to promoting the whole application of the flange ball valve in this application.

Preferably, the valve body is provided with the packing chamber in the one end that the brace table is close to the cavity, the setting of packing chamber is in the week side of valve rod, be provided with the filler in the packing chamber, the one end that the cavity was kept away from in the packing chamber is provided with the pressure cover.

Through adopting above-mentioned technical scheme, the filler has reduced the gap between valve rod and the valve body, has reduced the external impurity that gets into the cavity of valve body through the gap between valve rod and the valve body, presses the cover to make the filler keep being in and fills the intracavity, has reduced the probability of filler slippage from filling the intracavity, is favorable to promoting the leakproofness between valve body and the valve rod.

Preferably, the valve rod is equipped with the locating plate at the pot head that the handle is close to the brace table, be provided with the setting element on the brace table, the valve rod is provided with the locking piece that is used for fixing the locating plate on the valve rod in the one end that the handle was kept away from to the locating plate.

Through adopting above-mentioned technical scheme, drive the case through rotatory handle and rotate, the locating plate will with the setting element butt for the handle can't continue to rotate, at this moment, first opening and second opening are in connected state or shutoff state, are favorable to rotating the handle to required position fast, prevent to be in the state of half intercommunication or half shutoff because of the handle is rotatory excessively to lead to first opening and second opening, has promoted the whole application of the flange ball valve in this application.

Preferably, the valve rod is sleeved with the retaining piece at one end of the locking piece, which is far away from the positioning plate.

Through adopting above-mentioned technical scheme, the stopping piece can prevent to lead to the locking piece not hard up because of the valve rod is rotatory, is favorable to promoting the steadiness of locking piece.

Preferably, the valve rod is provided with an elastic element in a compressed state at one end of the retaining element close to the support table, one end of the elastic element far away from the valve body abuts against the side wall of the retaining element close to the valve body, and one end of the elastic element far away from the retaining element abuts against the side wall of the support table far away from the valve body.

Through adopting above-mentioned technical scheme, the usable elastic restoring force of elastic component self supports the lateral wall that the supporting bench was kept away from to the stopping piece tightly on the lateral wall that the locking piece is close to the case, has reduced the not hard up probability of slippage of stopping piece, is favorable to promoting the steadiness of stopping piece.

Preferably, the locating plate includes location portion and sticking portion, the sticking portion sets up the one end of keeping away from the valve gap in location portion, the one end that the location portion was kept away from to the sticking portion is provided with the locking hole, the lateral wall that the valve body was kept away from to the brace table is fixed in the one end of keeping away from the valve gap and is provided with the locking plate, the both ends of locking plate are provided with the lockhole.

Through adopting above-mentioned technical scheme, when twist grip for first opening and second opening are in intercommunication or shutoff state, the locating part of locating plate will with the setting element butt, and simultaneously, the lock top hole of sticking department will be in coaxial state with the lockhole of locking plate, at this moment, can wear to establish in lockhole and lockhole with retaining members such as bolt, make the locating plate fix the current position, thereby make first opening and second opening keep the state of intercommunication or shutoff, be favorable to promoting the whole application of the flange ball valve in this application.

Preferably, the valve rod is sleeved with a gasket at one end of the handle far away from the support platform, and the gasket is positioned between the side wall of the handle far away from the support platform and the side wall of the fastener close to the chamber.

Through adopting above-mentioned technical scheme, the gasket can increase the handle and keep away from the lateral wall of a supporting bench and the fastener and be close to the frictional force between the lateral wall of cavity, is favorable to reducing the not hard up probability of fastener, has promoted the steadiness of fastener.

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

1. the first elastic sheet and the second elastic sheet which are in a compressed state are arranged between the valve seat and the accommodating cavity, the first elastic sheet is abutted against the side wall of the accommodating cavity, the second elastic sheet is abutted against the valve seat, and the first elastic sheet and the second elastic sheet are abutted against each other, so that the valve seat can be abutted against the outer side wall of the valve core, a gap between the valve seat and the valve core is favorably reduced, and the leakage amount between the valve seat and the valve core is reduced;

2. the filling cavity is formed in the valve body, the filler is arranged in the filling cavity, and the valve rod penetrates through the filling cavity, so that a gap between the valve rod and the valve body is reduced, and further, external impurities entering the cavity of the valve body through the gap between the valve rod and the valve body are reduced, and the sealing property between the valve body and the valve rod is favorably improved;

3. through setting up the locating plate on the valve rod, set up the setting element on the brace table, when driving the case through rotatory handle and rotate, the locating plate will with the setting element butt for the handle can't continue to rotate, at this moment, first opening and second opening are in connected state or shutoff state, are favorable to rotating the handle to required position fast.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a cross-sectional view of an embodiment of the present application.

Description of reference numerals: 1. a valve body; 2. a flange plate; 3. a valve cover; 4. an inner hexagonal sinking groove; 5. a first port; 6. a second port; 7. a chamber; 8. a valve core; 9. a flow-through hole; 10. a containing groove; 11. a first spring plate; 12. a second elastic sheet; 13. a valve seat; 14. a flange; 15. a gasket; 16. a support table; 17. a valve stem; 18. a groove; 19. a bump; 20. filling the cavity; 21. a filler; 22. a handle; 23. a fastener; 24. a gasket; 25. positioning a plate; 251. a positioning part; 252. a locking portion; 26. a locking member; 27. a backstop member; 28. an elastic member; 29. a positioning member; 30. a locking hole; 31. a locking plate; 32. a lock hole; 33, pressing and sleeving.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a flange ball valve. Referring to fig. 1 and 2, the flange ball valve includes being cylindric valve body 1, and coaxial welded fastening is provided with ring flange 2 on the two-phase relative lateral wall of valve body 1 axial, and coaxial circular valve gap 3 that is provided with on the axial lateral wall of valve body 1, and valve gap 3 can dismantle through the bolt and wear to establish on valve body 1, and the hexagonal heavy groove 4 in the interior has been seted up coaxially on the lateral wall of valve gap 3, through hexagonal heavy groove 4 in the interior, can use tools such as spanner to install or take out valve gap 3 from valve body 1. A first round through hole 5 is coaxially formed in the bottom side wall of the inner hexagonal sinking groove 4, and a second round through hole 6 is coaxially formed in the axial side wall of the valve body 1 opposite to the valve cover 3. A spherical cavity 7 is arranged in the valve body 1, and the first through opening 5 and the second through opening 6 are communicated with the cavity 7.

A spherical valve core 8 is rotatably arranged in the cavity 7, and cylindrical flow passage through holes are coaxially formed in the side walls of the valve core 8, which are close to the first through hole 5 and the second through hole 6. The side wall of the valve cover 3 close to the valve core 8 is provided with a containing groove 10 with a rectangular cross section on the peripheral side of the first through hole 5 and the side wall of the chamber 7 opposite to the valve cover 3 on the peripheral side of the second through hole 6, and a first elastic sheet 11 and a second elastic sheet 12 which are in a compressed state and have a radial cross section in a V shape are arranged in the containing groove 10. The first elastic sheet 11 abuts against the top side wall of the accommodating groove 10 and the side wall close to the valve core 8, and the second elastic sheet 12 abuts against one end, far away from the accommodating groove 10, of the first elastic sheet 11. An annular valve seat 13 is disposed at an end of the second resilient piece 12 away from the receiving groove 10, in this embodiment, the valve seat 13 may be made of PTFE. The first elastic sheet 11 utilizes the self elastic restoring force to enable the second elastic sheet 12 to be tightly abutted against the valve seat 13, and the second elastic sheet 12 utilizes the self elastic restoring force to enable the valve seat 13 to be tightly abutted against the outer side wall of the valve core 8.

A flange 14 with a rectangular cross section is fixedly welded on the peripheral side wall of the chamber 7 close to the valve cap 3, and a gasket 15 is fixedly embedded on the side wall of the flange 14 close to the valve cap 3, wherein in the embodiment, the gasket 15 may be made of PTFE. When installation valve gap 3, valve gap 3 is close to the lateral wall butt of cavity 7 on packing ring 15, and packing ring 15 can provide the buffering to valve gap 3, reduces valve gap 3 when the installation to disk seat 13 pressure, and then reduces disk seat 13 to the pressure of case 8, prevents that disk seat 13 from excessively extrudeing case 8 and leading to case 8 to rotate the difficulty, is favorable to promoting the whole application of the flange ball valve in this application.

One end of the valve body 1, which is far away from the chamber 7, is fixedly welded with a rectangular support platform 16, a cylindrical valve rod 17 vertically penetrates through the top side wall of the support platform 16, the valve rod 17 penetrates through the valve body 1, and the valve rod 17 extends towards the valve core 8. The outer side wall of the valve core 8 is provided with a rectangular groove 18 at a position close to the support platform 16, one end of the valve rod 17 close to the cavity 7 is fixedly welded with a projection 19 which is adaptive to and clamped with the groove 18, and the valve rod 17 can drive the valve core 8 to rotate in the cavity 7 through adaptive clamping of the projection 19 and the groove 18.

One end of the valve body 1 close to the support platform 16 is provided with a cylindrical filling cavity 20, the valve rod 17 is coaxially arranged in the filling cavity 20 in a penetrating manner, and a filler 21 is arranged in the filling cavity 20, wherein in the embodiment, the filler 21 can be a V-shaped filler 21 made of PTFE. The peripheral side wall of the packing 21 abuts against the peripheral side wall of the packing chamber 20 close to the valve stem 17, and the peripheral side wall of the packing 21 close to the valve stem 17 abuts against the peripheral side wall of the valve stem 17. One end of the filling cavity 20 close to the support platform 16 is provided with a circular pressing sleeve 33 in a covering and matching manner. The packing 21 reduces the gap between the valve rod 17 and the valve body 1, reduces the external impurities entering the cavity 7 of the valve body 1 through the gap between the valve rod 17 and the valve body 1, and the pressing sleeve 33 can keep the packing 21 in the filling cavity 20, reduce the probability of the packing 21 slipping from the filling cavity 20, and facilitate the improvement of the sealing property between the valve body 1 and the valve rod 17.

The end of the valve stem 17 remote from the chamber 7 is sleeved with a handle 22, and the handle 22 extends vertically in a direction away from the valve stem 17. The end of the valve stem 17 remote from the chamber 7 is provided with a fastener 23 for preventing the handle 22 from slipping off the valve stem 17, and in this embodiment, the fastener 23 may be a bolt. The valve stem 17 is coaxially sleeved with a circular gasket 24 between the fastener 23 and the handle 22, and in this embodiment, the gasket 24 may be made of an aluminum alloy. The spacer 24 can increase the friction between the side wall of the handle 22 away from the support platform 16 and the side wall of the fastener 23 close to the chamber 7, which is beneficial to reducing the probability of loosening of the fastener 23 and improving the stability of the fastener 23.

An L-shaped positioning plate 25 is sleeved on one end of the handle 22 of the valve rod 17 close to the support platform 16. The valve rod 17 is provided with a locking member 26 at an end of the positioning plate 25 far away from the handle 22, and in the embodiment, the locking member 26 may be a nut. The locking member 26 can press the positioning plate 25 against the sidewall of the handle 22 near the support platform 16, so that the positioning plate 25 is fixed relative to the handle 22. The stem 17 is sleeved with a retaining member 27 having an inverted Contraband-shaped cross section at an end of the locking member 26 adjacent to the support platform 16, and in this embodiment, the retaining member 27 may be a retaining washer 15. The side wall of the backstop 27 adjacent the handle 22 abuts against the side wall of the locking member 26 adjacent the support platform 16. The retainer 27 prevents the locking member 26 from being loosened by the rotation of the valve stem 17, which is advantageous for improving the stability of the locking member 26.

The valve rod 17 is provided with an elastic member 28 in a compressed state coaxially penetrating through one end of the retainer 27 close to the support base 16, and in the present embodiment, the elastic member 28 may be a disc spring. One end of the elastic member 28 away from the handle 22 abuts against the pressing sleeve 33, and one end of the elastic member 28 away from the support platform 16 abuts against the side wall of the retaining member 27 close to the support platform 16. The elastic element 28 can utilize the elastic restoring force of itself to tightly support the side wall of the retaining element 27 far from the support platform 16 on the side wall of the locking element 26 close to the valve core 8, so that the probability of loosening and slipping of the retaining element 27 is reduced, and the stability of the retaining element 27 is improved.

The positioning plate 25 includes a positioning portion 251 and a locking portion 252, and the length directions of the positioning portion 251 and the locking portion 252 are perpendicular to each other. The positioning member 29 vertically penetrates through the inner corner of the top side wall of the support platform 16, and in this embodiment, the positioning member 29 may be a screw rod. When driving case 8 through rotatory handle 22 and rotating, location portion 251 will with setting element 29 butt for handle 22 can't continue to rotate, at this moment, first port 5 is in the connected state or the shutoff state with second port 6, is favorable to rotating handle 22 to required position fast, prevents to be in the state of partly communicating or partly shutoff because of handle 22 is rotatory excessively to lead to first port 5 and second port 6, has promoted the whole application of the flange ball valve in this application.

The end of the locking portion 252 remote from the valve stem 17 is pierced with a circular locking hole 30. One side of the top side wall of the support platform 16, which is far away from the valve cover 3, is fixedly provided with a rectangular locking plate 31 through a bolt, and two ends of the top side wall of the locking plate 31 along the length direction are provided with locking holes 32. When twist grip 22, make first opening 5 and second opening 6 be in the intercommunication or when the shutoff state, the location portion 251 of locating plate 25 will with setting element 29 butt, and simultaneously, the lock top hole of locking portion 252 will be in coaxial state with the lockhole 32 of locking plate 31, at this moment, can wear to establish in locking hole 30 and lockhole 32 with retaining members such as bolt, make locating plate 25 fix in the current position, thereby make first opening 5 and second opening 6 keep the state of intercommunication or shutoff, be favorable to promoting the whole application of the flange ball valve in this application.

The implementation principle of the flange ball valve in the embodiment of the application is as follows: when the valve body 1 is installed on a pipeline through the flange plate 2, the first through hole 5 and the second through hole 6 are communicated with the pipeline, the handle 22 is rotated, the handle 22 drives the valve rod 17 to rotate in the valve body 1, the valve rod 17 drives the valve core 8 to rotate in the cavity 7, when the positioning plate 25 on the valve rod 17 is abutted to the positioning piece 29, the flow passage through hole is communicated with the first through hole 5 and the second through hole 6, and a medium in the pipeline can circulate in the pipeline through the valve body 1; when the handle 22 is rotated reversely, the valve core 8 is rotated to a position for blocking the first through hole 5 and the second through hole 6, the pipeline is in a cut-off state, the medium in the pipeline is blocked, and the medium cannot flow in the pipeline through the valve body 1. When the valve core 8 rotates to the position for plugging the first through hole 5 and the second through hole 6, the first elastic sheet 11 tightly supports the second elastic sheet 12 on the valve seat 13 through the self elastic restoring force, and the second elastic sheet 12 tightly supports the valve seat 13 on the outer side wall of the valve core 8 through the self elastic restoring force. By such an arrangement, a gap between the valve seat 13 and the valve element 8 is reduced, so that the leakage amount between the valve seat 13 and the valve element 8 is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A flange ball valve which characterized in that: the valve comprises a valve body (1), flange plates (2) are fixedly arranged on two opposite side walls of the valve body (1), a valve cover (3) is detachably arranged on the side wall of the valve body (1), a first through hole (5) is formed in the valve cover (3), a second through hole (6) is formed in the side wall of the valve body (1) opposite to the valve cover (3), a cavity (7) is arranged in the valve body (1), the first through hole (5) is communicated with the cavity (7), the second through hole (6) is communicated with the cavity (7), a valve core (8) is rotatably arranged in the cavity (7), a flow passage through hole is formed in the valve core (8), a support table (16) is fixedly arranged at one end, far away from the cavity (7), of the valve body (1), a valve rod (17) is rotatably penetrated in the support table (16), one end, far away from the valve rod (17), is detachably connected with the support table (, a handle (22) used for rotating the valve rod (17) is sleeved at one end, far away from the cavity (7), of the valve rod (17), a fastener (23) used for fixing the handle (22) on the valve rod (17) is arranged at one end, far away from the valve core (8), of the valve rod (17), a containing groove (10) is arranged between the periphery side, close to the valve core (8), of the first opening (5) of the valve cover (3) and the periphery side, close to the valve core (8), of the cavity (7) at the second opening (6), a first elastic sheet (11) and a second elastic sheet (12) in a compressed state are arranged in the containing groove (10), the first elastic sheet (11) is abutted against the side wall of the containing groove (10), the side wall, far away from the valve core (8), of the second elastic sheet (12) is abutted against the side wall, close to the valve core (8), of the first elastic sheet (11), and a valve seat (13) is arranged at one end, far, the side wall of the valve seat (13) far away from the containing groove (10) is in sliding butt joint with the valve core (8), and one end of the second elastic sheet (12) far away from the first elastic sheet (11) is in butt joint with the side wall of the valve seat (13) far away from the valve core (8).

2. The flanged ball valve of claim 1, wherein: the side wall of the cavity (7) close to the valve cover (3) is provided with a flange (14), the side wall of the flange (14) far away from the valve core (8) is provided with a gasket (15), and the side wall of the valve cover (3) close to the valve core (8) is abutted to the gasket (15).

3. The flanged ball valve of claim 1, wherein: one end of the valve body (1) close to the cavity (7) at the supporting table (16) is provided with a filling cavity (20), the filling cavity (20) is arranged on the peripheral side of the valve rod (17), a filler (21) is arranged in the filling cavity (20), and one end, far away from the cavity (7), of the filling cavity (20) is provided with a pressing sleeve (33).

4. The flanged ball valve of claim 1, wherein: valve rod (17) are equipped with locating plate (25) at handle (22) one pot head that is close to brace table (16), be provided with setting element (29) on brace table (16), valve rod (17) are provided with locking piece (26) that are used for fixing locating plate (25) on valve rod (17) in the one end that handle (22) were kept away from in locating plate (25).

5. The flanged ball valve of claim 4, wherein: and a backstop (27) is sleeved on one end, far away from the positioning plate (25), of the valve rod (17) at the locking piece (26).

6. The flanged ball valve of claim 5, wherein: the valve rod (17) is provided with at the one end that backstop piece (27) are close to brace table (16) and is in compression state elastic component (28), the one end that valve body (1) were kept away from in elastic component (28) is close to the lateral wall looks butt of valve body (1) with backstop piece (27), the one end butt that backstop piece (27) were kept away from in elastic component (28) is on the lateral wall that valve body (1) were kept away from in brace table (16).

7. The flanged ball valve of claim 4, wherein: the positioning plate (25) comprises a positioning portion (251) and a locking portion (252), the locking portion (252) is arranged at one end, away from the valve cover (3), of the positioning portion (251), a locking hole (30) is formed in one end, away from the positioning portion (251), of the locking portion (252), a locking plate (31) is fixedly arranged at one end, away from the valve cover (3), of the side wall, away from the valve body (1), of the supporting table (16), and locking holes (32) are formed in two ends of the locking plate (31).

8. The flanged ball valve of claim 1, wherein: valve rod (17) are equipped with gasket (24) at handle (22) keep away from the pot head of brace table (16), gasket (24) are located handle (22) and are kept away from between the lateral wall of brace table (16) and fastener (23) are close to the lateral wall of cavity (7).