Anti-falling ball valve seat with quick disassembly and assembly function

Abstract

The invention relates to the technical field of ball valves, and discloses an anti-falling ball valve seat with a quick dismounting and mounting function, the anti-falling ball valve seat comprises a valve body, a valve rod, a spherical clack and a valve seat main body, the end part of the valve rod is fixedly connected with the valve clack, the surface of the valve clack is fixedly connected with the spherical clack through a bolt, and a dismounting assembly is mounted in the valve body. The disassembling assembly comprises a plurality of assembling protrusions, an assembling groove and a fixing mechanism, the assembling protrusions are fixedly arranged on the outer wall of the valve seat body, and the assembling groove is formed in the inner wall of one end of the valve body. The clamping blocks are inserted into the clamping grooves to fix the valve seat body, when the valve seat body is abraded and needs to be replaced, the clamping blocks are moved into the clamping grooves, the valve seat body can be pulled out for replacement, and when the spherical petals need to be replaced, the bolts are screwed and taken down to replace the spherical petals. The valve seat body and the spherical clack are replaced at the outlet of the valve body, the whole valve body does not need to be disassembled, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, in particular to an anti-dropping ball valve seat with a quick disassembly and assembly function. Background Art

[0002] V-type ball valve is a valve widely used in oil pipelines, natural gas pipelines and chemical systems.

[0003] When the existing V-type ball valve is in use, the ball sealing surface and the valve seat at the outlet are easily worn and the sealing performance is poor. When the ball sealing surface or the valve seat is worn, it is necessary to stop the pipeline and disassemble the valve for maintenance and replace the valve ball or valve seat, resulting in a large waste of manpower and material resources. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an anti-dropping ball valve seat with a quick disassembly and assembly function, which solves the problem of inconvenience in replacing a valve ball or a valve seat.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an anti-dropping ball valve seat with a quick disassembly and assembly function, comprising a valve body, a valve stem, a spherical flap, and a valve seat body, the end of the valve stem is fixedly connected to a valve flap, the surface of the valve flap is fastened to the spherical flap by bolts, a disassembly component is installed inside the valve body, the disassembly component includes a plurality of assembly protrusions, an assembly groove and a fixing mechanism, the assembly protrusion is fixedly arranged on the outer wall of the valve seat body, the assembly groove is provided on the inner wall at one end of the valve body, the fixing mechanism includes a plurality of clamping grooves and a clamping block, the surface of the valve body protrudes outwardly corresponding to the clamping groove to form an installation chamber, the clamping block is slidably installed inside the installation chamber, a clamping piece is installed at the center of the installation chamber, and the clamping piece is used to clamp the clamping block.

[0006] Preferably, a plurality of limiting columns are fixedly provided on the side of the spherical flap facing the valve flap, a plurality of slots are provided on the surface of the valve flap corresponding to the limiting columns, a convex mounting groove is provided on the surface of the spherical flap, and a cover plate is rotatably connected to the interior of the mounting groove via a torsion spring shaft.

[0007] Preferably, the card slot is configured in a right-angled trapezoidal shape, and the card block is configured in a square shape.

[0008] Preferably, the pressing member is an electric push rod, the outer wall of the electric push rod is fixedly connected to the installation chamber, and a pressure sensor is fixedly provided on the side of the clamping block facing the pressing member.

[0009] Preferably, one end of the clamping block is provided with a chamfered surface, and the driving end of the electric push rod is fixedly connected to the side wall of the clamping block with a retractable connecting rod.

[0010] Preferably, the disassembly assembly also includes a sealing mechanism, which includes an annular groove, a chamber and two flow channels, the groove is opened on the surface of the valve disc, an airbag is fixedly arranged inside the groove, the chamber is opened inside the valve stem, and the flow channel is opened on the surface of the valve stem and the valve disc, one end of the flow channel is connected to the chamber, and the other end of the flow channel is connected to the air inlet of the airbag.

[0011] Preferably, a high-pressure air guide tube is provided through the center of the valve stem, and the bottom end of the high-pressure air guide tube is fixedly connected to the inner wall of the chamber.

[0012] Preferably, the valve stem includes an upper rod body and a lower rod body, the lower rod body is arranged in a cross shape, a connecting groove is provided on the top of the lower rod body, the bottom end of the upper rod body is rotatably connected to the connecting groove, and two valve flaps are provided, and the two valve flaps are symmetrically distributed along the vertical center line of the valve stem.

[0013] Preferably, a rotation adjustment component is installed inside the connecting groove, and the rotation adjustment component includes a special-shaped groove and a positioning groove. The special-shaped groove is opened at the bottom of the connecting groove, and a hollow special-shaped column is inserted into the inside of the special-shaped groove. The top of the special-shaped column is fixedly connected with a positioning piece, and the positioning groove is opened at the bottom end of the upper rod body. The outer wall of the special-shaped column is sleeved with an elastic piece.

[0014] Preferably, an L-shaped rotating column is fixedly connected to the top end of the positioning member, the rotating column passes through the upper rod body, and a limiting groove is formed at the top end of the upper rod body.

[0015] Working principle: When the valve seat body is worn and needs to be replaced, the controller controls the electric push rod to retract, and the block exits the slot under the pull of the electric push rod and the connecting rod, and the valve seat body can be pulled out for replacement. When the spherical flap needs to be replaced, the spherical flap is first rotated to align with the valve seat body and then the valve seat body is taken out. At this time, the bolts can be unscrewed and the spherical flap can be replaced. By replacing the valve seat body and the spherical flap at the outlet of the valve body, there is no need to disassemble the entire valve body, which is convenient for use. During replacement, high-pressure gas is introduced through the high-pressure air pipe. The high-pressure gas enters the chamber through the high-pressure air pipe and extends the flow channel into the air bag, causing the air bag to expand, thereby blocking the gap between the valve flap and the inner wall of the valve body, achieving a sealing and waterproof effect, and reducing the amount of liquid outflow at the outlet of the valve body when replacing the valve seat body or the spherical valve.

[0016] The valve seat body is inserted into the valve body, and the controller controls the operation of the electric push rod. The electric push rod extends to press against the pressure sensor, pushes the block to be inserted and press against the uppermost side of the inclined surface of the slot, thereby limiting the valve seat body. When the valve body is closed, the pressure data is detected by the pressure sensor. When the valve seat body is worn, the valve seat body is no longer tightly fitted with the spherical petal, and the valve seat body will move laterally. At this time, the inclined surface of the slot is not in close contact with the block, so that the block moves, causing the pressure value detected by the pressure sensor to change. When the pressure sensor detects a change in the value, it transmits a signal to the controller. The controller The controller controls the electric push rod to extend again, pushing the block to move along the inclined surface of the slot, thereby pushing the main body of the card column to move in the direction of the spherical flap, filling the gap caused by wear, and stopping operation when the pressure value reaches a predetermined value, thereby extending the service life of the valve seat main body, and when wear occurs at the intersection of the spherical flap surface and the valve seat main body, the valve body is closed, and the main body of the card column will be inserted into the wear groove on the surface of the spherical flap under the push of the electric push rod, thereby jamming the spherical flap and making it impossible for the spherical flap to rotate open, thereby prompting the operator that the spherical flap is worn, which is convenient for timely replacement of the spherical flap.

[0017] The positioning piece is lifted up by the elastic piece so that the positioning piece is inserted into the positioning groove, thereby driving the lower rod body to rotate when the upper rod body is rotated, thereby realizing the rotation adjustment of the spherical flap, and when the spherical flap is worn, the positions of the two sets of spherical flaps can be replaced, so that the unworn spherical flaps can be used to achieve the effect of closing the valve body, reducing the number of replacement times of the spherical flaps. When the spherical flap needs to be replaced, first control the electric push rod to retract, and then press the rotating column downward, the rotating column drives the positioning piece to exit the connecting groove, and finally rotate the rotating column 180°, the rotating column drives the positioning piece to rotate, the positioning piece drives the special-shaped column to rotate, and the special-shaped column drives the valve flap to rotate, thereby switching the positions of the two sets of spherical flaps.

[0018] The present invention provides a ball valve seat with a quick disassembly and assembly function to prevent it from falling off. It has the following beneficial effects: 1. The present invention fixes the valve seat body by inserting a clamping block into the inside of a clamping slot. When the valve seat body is worn and needs to be replaced, the clamping block is moved into the clamping slot, and the valve seat body can be pulled out for replacement. When the spherical flap needs to be replaced, the spherical flap can be replaced by unscrewing and removing the bolts. By replacing the valve seat body and the spherical flap at the outlet of the valve body, there is no need to disassemble the entire valve body, which is convenient for use.

[0019] 2. The present invention pushes the main body of the clamping column to move in the direction of the spherical petal through the electric push rod, thereby compensating for the gap caused by the wear of the valve seat main body, thereby extending the service life of the valve seat main body and simultaneously serving as a reminder of the wear of the spherical petal.

[0020] 3. The present invention introduces high-pressure gas through the high-pressure air duct to expand the airbag, thereby blocking the gap between the valve disc and the inner wall of the valve body, achieving a sealing and waterproof effect, and reducing the liquid outflow at the valve body outlet when replacing the valve seat body or the ball valve.

[0021] 4. When the spherical flaps are worn, the positions of the two groups of spherical flaps can be replaced, so that the unworn spherical flaps can be used to achieve the effect of closing the valve body, thereby reducing the number of replacement times of the spherical flaps and the number of pipeline shutdowns. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a stereogram of the present invention.

[0023] Figure 2 It is a schematic cross-sectional view of the valve body of the present invention.

[0024] Figure 3 It is a schematic diagram of the internal structure of the valve body of the present invention.

[0025] Figure 4 It is a schematic diagram of the assembly protrusion and assembly groove structure of the present invention.

[0026] Figure 5 It is a partial cross-sectional schematic diagram of the valve seat body of the present invention.

[0027] Figure 6 For the present invention Figure 4 An enlarged schematic diagram of point A.

[0028] Figure 7 It is a schematic diagram of the connecting rod structure of the present invention.

[0029] Figure 8 It is a schematic diagram of the valve flap and the spherical flap of the present invention.

[0030] Fig. 9 It is a schematic diagram of the sealing mechanism structure of the present invention.

[0031] Fig.10 It is a schematic diagram of the valve stem structure of the present invention.

[0032] Fig.11 It is a cross-sectional schematic diagram of the upper rod body and the lower rod body of the present invention.

[0033] Fig.12 It is a schematic diagram of the positioning member and positioning groove structure of the present invention.

[0034] Among them, 1. valve body; 2. valve stem; 21. upper rod body; 22. lower rod body; 23. connecting groove; 24. limiting groove; 3. spherical flap; 4. valve seat body; 5. valve flap; 6. disassembly component; 61. assembly protrusion; 62. fixing mechanism; 63. sealing mechanism; 64. assembly groove; 621. card slot; 622. card block; 623. pressure sensor; 624. connecting rod; 631. groove; 632. air bag; 633. chamber; 634. circulation channel; 635. high-pressure air duct; 7. installation chamber; 8. rotation adjustment component; 81. special-shaped groove; 82. special-shaped column; 83. positioning piece; 84. positioning groove; 85. elastic piece; 86. rotating column; 9. pressing piece; 10. limiting column; 11. slot; 12. installation groove; 13. cover plate. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Please see attached Figure 1 -Attached Figure 6 The embodiment of the present invention provides an anti-dropping ball valve seat with a quick disassembly and assembly function, comprising a valve body 1, a valve stem 2, a spherical flap 3, and a valve seat body 4. The valve body 1 is rotatably connected to the valve stem 2 and a packing seal is provided between the two. A valve flap 5 is fixedly connected to the end of the valve stem 2. The surface of the valve flap 5 is fastened to the spherical flap 3 by bolts. The bolts are made of stainless steel. A disassembly component 6 is installed inside the valve body 1. The disassembly component 6 includes a plurality of assembly protrusions 61, an assembly groove 64, and a fixing mechanism 62. The assembly protrusion 61 is fixedly arranged on the outer wall of the valve seat body 4. The assembly groove 64 is provided on the inner wall of one end of the valve body 1. The assembly protrusion 61 is inserted into the assembly groove 64 to facilitate the engagement of the clamping block 622 with the clamping groove 62. 1, a sealing ring is fixedly arranged on the outer wall of the valve seat body 4 to improve the sealing between the valve seat body 4 and the inner wall of the valve body 1, the fixing mechanism 62 includes a plurality of slots 621 and blocks 622, the slots 621 are arranged on the outer wall of the valve seat body 4, the surface of the valve body 1 protrudes outwardly corresponding to the slots 621 to form an installation chamber 7, the block 622 is slidably installed in the interior of the installation chamber 7, a clamping piece 9 is installed at the center of the installation chamber 7, the clamping piece 9 is used to clamp the block 622, a driving device is installed on the top of the valve body 1, the driving device is used to drive the valve stem 2 to rotate, the driving device can be a worm gear transmission device, a pneumatic driving device, a hydraulic driving device, an electric device, etc., and the driving device is electrically connected to a controller.

[0037] Specifically, the valve disc 5 is driven to rotate by rotating the valve stem 2. When the outer wall of the spherical disc 3 abuts against the valve seat body 4, the ball valve is closed. When the valve seat body 4 is installed, the valve body 1 is closed, and the valve seat body 4 is inserted into the interior of the valve body 1 until one end of the valve seat body 4 abuts against the spherical disc 3. Pressure is applied to the clamping block 622 through the clamping piece 9, so that the clamping block 622 is inserted into the interior of the clamping groove 621, thereby fixing the valve seat body 4. When the valve seat body 4 is worn and needs to be replaced, the clamping block 622 is moved into the clamping groove 621, and the valve seat body 4 can be pulled out for replacement. When the spherical disc 3 needs to be replaced, the spherical disc 3 is first rotated to align with the valve seat body 4 and then the valve seat body 4 is taken out. At this time, the bolts can be unscrewed and the spherical disc 3 can be replaced. By replacing the valve seat body 4 and the spherical disc 3 at the outlet of the valve body 1, there is no need to disassemble the entire valve body 1, which is convenient for use.

[0038] Please see attached Figure 7 A plurality of limit posts 10 are fixedly arranged on the side of the spherical flap 3 facing the valve flap 5, a plurality of slots 11 are provided on the surface of the valve flap 5 corresponding to the limit posts 10, a convex mounting groove 12 is provided on the surface of the spherical flap 3, and a cover plate 13 is rotatably connected to the interior of the mounting groove 12 via a torsion spring shaft.

[0039] Specifically, when installing the spherical petal 3, the limiting column 10 is aligned and inserted into the interior of the installation groove 12 for limiting, thereby improving the stability of the spherical petal 3, and the cover plate 13 blocks the installation groove 12 through the torque of the torsion spring, thereby preventing the impact force of the water flow from acting on the surface of the bolt, causing the bolt to loosen and cause the spherical petal 3 to fall off.

[0040] Please see attached Figure 5 -Attached Figure 6 The card slot 621 is set to a right-angled trapezoidal shape, the card block 622 is set to a square shape, the clamping piece 9 adopts an electric push rod, the controller is electrically connected to the electric push rod and the pressure sensor 623, the outer wall of the electric push rod is fixedly connected to the installation chamber 7, and the card block 622 is fixedly provided with a pressure sensor 623 on the side facing the clamping piece 9. When the card block 622 is inserted into and abuts against the uppermost side of the inclined surface of the card slot 621, the value detected by the pressure sensor 623 is a predetermined value. Similarly, the clamping piece 9 can adopt a lead screw, which is threadedly connected to the installation chamber 7 in a threaded connection manner, and the clamping force is applied to the card block 622 in a manually operated manner by screwing the lead screw.

[0041] Specifically, the valve seat body 4 is inserted into the valve body 1, and the controller controls the operation of the electric push rod. The electric push rod extends to press against the pressure sensor 623, and the block 622 is pushed to be inserted and press against the uppermost side of the inclined surface of the slot 621, so as to limit the valve seat body 4. When the valve body 1 is closed, the pressure data is detected by the pressure sensor 623. When the valve seat body 4 is worn, the valve seat body 4 is no longer tightly fitted with the spherical petal 3, and the valve seat body 4 will move laterally. At this time, the inclined surface of the slot 621 is not in close contact with the block 622, so that the block 622 moves, resulting in a change in the pressure value detected by the pressure sensor 623. When the pressure sensor 623 detects a change in the value, it transmits a signal to the controller, and the controller controls the electric push rod. The push rod extends again, pushing the block 622 to move along the inclined surface of the slot 621, thereby pushing the main body of the card column to move in the direction of the spherical flap 3 to fill the gap caused by wear, and stops running when the pressure value reaches a predetermined value, thereby extending the service life of the valve seat body 4, and when wear occurs at the intersection of the surface of the spherical flap 3 and the valve seat body 4, the valve body 1 is closed, and the main body of the card column will be inserted into the wear groove on the surface of the spherical flap 3 under the push of the electric push rod, thereby jamming the spherical flap 3, making it impossible for the spherical flap 3 to rotate open, thereby prompting the operator that the spherical flap 3 is worn, which is convenient for timely replacement of the spherical flap 3, and when the controller sends an open signal, the pressure sensor 623 stops detecting to avoid generating false signals.

[0042] Please see attached Figure 6 -Attached Figure 7 One end of the block 622 is provided with a chamfered surface, and the driving end of the electric push rod is fixedly connected to the side wall of the block 622 with a retractable connecting rod 624.

[0043] Specifically, the chamfered surface makes it easier for the valve seat body 4 to pass through the block 622 when being inserted. The minimum contraction amplitude of the connecting rod 624 is smaller than the thickness of the pressure sensor 623, so that the electric push rod can extend and push the connecting rod 624 to contract to resist the pressure sensor 623. When the valve seat body 4 needs to be removed, the electric push rod contracts, and the electric push rod contracts to pull the block 622 to slide outward through the connecting rod 624, so that the block 622 exits the slot 621, thereby facilitating the removal of the valve seat body 4.

[0044] Please see attached Fig. 9The disassembly assembly 6 also includes a sealing mechanism 63, which includes an annular groove 631, a chamber 633 and two flow channels 634. The groove 631 is opened on the surface of the valve disc 5. An airbag 632 is fixedly arranged inside the groove 631. The airbag 632 is arranged at the angle between the valve disc 5 and the valve body 1, so that it can be sealed without expanding to a large extent. The chamber 633 is opened inside the valve stem 2, and the flow channel 634 is opened on the surface of the valve stem 2 and the valve disc 5. One end of the flow channel 634 is connected to the chamber 633, and the other end of the flow channel 634 is connected to the air inlet of the airbag 632. A high-pressure air guide tube 635 is arranged through the center of the valve stem 2. The bottom end of the high-pressure air guide tube 635 is fixedly connected to the inner wall of the chamber 633. A valve and an air pressure detector are installed on the surface of the high-pressure air guide tube 635. The air pressure detector is used to detect the pressure when the high-pressure gas is introduced to avoid the rupture of the airbag 632 due to excessive pressure.

[0045] Specifically, the airbag 632 is accommodated inside the groove 631 to prevent the airbag 632 from rubbing against the inside of the valve body 1 when the valve flap 5 rotates. When the valve seat body 4 or the ball valve is replaced, high-pressure gas is introduced through the high-pressure air pipe 635. The high-pressure gas enters the chamber 633 through the high-pressure air pipe 635 and extends the flow channel 634 into the airbag 632, causing the airbag 632 to expand, thereby blocking the gap between the valve flap 5 and the inner wall of the valve body 1, achieving a sealing and waterproof effect, and reducing the amount of liquid outflow at the outlet of the valve body 1 when the valve seat body 4 or the ball valve is replaced.

[0046] Please see attached Fig.10 -Attached Fig.12The valve stem 2 includes an upper rod body 21 and a lower rod body 22. The lower rod body 22 is set in a cross shape. A connecting groove 23 is opened on the top of the lower rod body 22. The bottom end of the upper rod body 21 is rotatably connected to the connecting groove 23. A sealing ring is fixedly arranged at the intersection of the outer wall of the upper rod body 21 and the connecting groove 23 for sealing. Two valve flaps 5 are provided, and the two valve flaps 5 are symmetrically distributed along the vertical center line of the valve stem 2. A rotation adjustment component 8 is installed inside the connecting groove 23. The rotation adjustment component 8 includes a special-shaped groove 81 and a positioning groove 84. The special-shaped groove 81 is opened at the bottom of the connecting groove 23. A hollow special-shaped column 82 is inserted inside the special-shaped groove 81. The high-pressure air guide pipe 635 passes through the special-shaped column 82. The top of the special-shaped column 82 is fixedly connected with a positioning piece 83. The positioning groove 84 is opened at the bottom of the upper rod body 21. The outer wall of the special-shaped column 82 is sleeved with an elastic piece 85. The elastic member 85 can be a leaf spring, a coil spring, a torsion bar spring, a rubber spring, etc. In this embodiment, a coil spring is used. The top of the positioning member 83 is fixedly connected with an L-shaped rotating column 86. The high-pressure air guide pipe 635 passes through the rotating column 86. The rotating column 86 passes through the upper rod body 21. A limiting groove 24 is provided at the top of the upper rod body 21. The limiting groove 24 is used to rotate the rotating column 86 180° from one side of the limiting groove 24 to the other side of the limiting groove 24, so that the operator can accurately control the rotation angle of the rotating column 86. A mounting hole is provided on the surface of the upper rod body 21, and a threaded through hole is provided on the surface of the rotating column 86 at the mounting hole. By installing a fixing bolt connected to the threaded through hole in the mounting hole, the fixing effect of the rotating column 86 is improved to prevent the positioning member 83 from accidentally falling out of the positioning groove 84.

[0047] Specifically, the positioning member 83 is lifted up by the elastic member 85 so that the positioning member 83 is inserted into the positioning groove 84, thereby driving the lower rod body 22 to rotate when the upper rod body 21 is rotated, thereby realizing the rotation adjustment of the spherical flap 3. When the spherical flap 3 is worn, the positions of the two groups of spherical flaps 3 can be replaced, so that the unworn spherical flaps 3 can be used to achieve the effect of closing the valve body 1, reducing the number of replacement times of the spherical flaps 3. When the spherical flap 3 needs to be replaced, the electric push rod is first controlled to retract, and then the rotating column 86 is pressed downward. The rotating column 86 drives the positioning member 83 to exit the connecting groove 23, and finally the rotating column 86 is rotated 180°. The rotating column 86 drives the positioning member 83 to rotate, the positioning member 83 drives the special-shaped column 82 to rotate, and the special-shaped column 82 drives the valve flap 5 to rotate, thereby switching the positions of the two groups of spherical flaps 3.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-drop ball valve seat with a quick disassembly and assembly function comprises a valve body (1), a valve stem (2), a spherical flap (3), and a valve seat body (4), and is characterized in that: A valve flap (5) is fixedly connected to the end of the valve stem (2), and the surface of the valve flap (5) is fastened to the spherical flap (3) by bolts. A disassembly component (6) is installed inside the valve body (1), and the disassembly component (6) comprises a plurality of assembly protrusions (61), an assembly groove (64) and a fixing mechanism (62). The assembly protrusion (61) is fixedly arranged on the outer wall of the valve seat body (4), and the assembly groove (64) is provided on the inner wall of one end of the valve body (1). The fixing mechanism (62) comprises a plurality of clamping grooves (621) and a clamping block (622). The clamping groove (621) is provided on the outer wall of the valve seat body (4). A mounting chamber (7) is formed by a surface of the valve body (1) protruding outwardly corresponding to the clamping groove (621). The clamping block (622) is slidably installed inside the mounting chamber (7). A pressing member (9) is installed at the center of the mounting chamber (7), and the pressing member (9) is used to press the clamping block (622).

2. The anti-drop ball valve seat with quick disassembly and assembly function according to claim 1, characterized in that: A plurality of limiting posts (10) are fixedly arranged on the side of the spherical flap (3) facing the valve flap (5); a plurality of slots (11) are provided on the surface of the valve flap (5) corresponding to the limiting posts (10); a convex mounting groove (12) is provided on the surface of the spherical flap (3); a cover plate (13) is rotatably connected to the interior of the mounting groove (12) via a torsion spring shaft.

3. The anti-drop ball valve seat with quick disassembly and assembly function according to claim 1, characterized in that: The clamping slot (621) is configured in a right-angled trapezoidal shape, and the clamping block (622) is configured in a square shape.

4. The anti-drop ball valve seat with quick disassembly and assembly function according to claim 1, characterized in that: The pressing member (9) adopts an electric push rod, the outer wall of the electric push rod is fixedly connected to the installation chamber (7), and a pressure sensor (623) is fixedly provided on the side of the clamping block (622) facing the pressing member (9).

5. The anti-drop ball valve seat with quick disassembly and assembly function according to claim 4, characterized in that: One end of the clamping block (622) is provided with an oblique cut surface, and a drive end of the electric push rod is fixedly connected to a side wall of the clamping block (622) with a retractable connecting rod (624).

6. The anti-drop ball valve seat with quick disassembly and assembly function according to claim 1, characterized in that: The disassembly assembly (6) further comprises a sealing mechanism (63), the sealing mechanism (63) comprising an annular groove (631), a chamber (633) and two circulation channels (634), the groove (631) being formed on the surface of the valve flap (5), an air bag (632) being fixedly arranged inside the groove (631), the chamber (633) being formed on the inside of the valve stem (2), the circulation channels (634) being formed on the surfaces of the valve stem (2) and the valve flap (5), one end of the circulation channels (634) being connected to the chamber (633), and the other end of the circulation channels (634) being connected to the air inlet of the air bag (632).

7. The anti-drop ball valve seat with quick disassembly and assembly function according to claim 1, characterized in that: A high-pressure air guide tube (635) is provided through the center of the valve stem (2), and the bottom end of the high-pressure air guide tube (635) is fixedly connected to the inner wall of the chamber (633).

8. The anti-drop ball valve seat with quick disassembly and assembly function according to claim 1, characterized in that: The valve stem (2) comprises an upper stem body (21) and a lower stem body (22); the lower stem body (22) is arranged in a cross shape; a connecting groove (23) is provided at the top of the lower stem body (22); the bottom end of the upper stem body (21) is rotatably connected to the connecting groove (23); two valve flaps (5) are provided, and the two valve flaps (5) are symmetrically distributed along a vertical center line of the valve stem (2).

9. The anti-drop ball valve seat with quick disassembly and assembly function according to claim 8, characterized in that: A rotation adjustment assembly (8) is installed inside the connecting groove (23), and the rotation adjustment assembly (8) comprises a special-shaped groove (81) and a positioning groove (84). The special-shaped groove (81) is arranged at the bottom of the connecting groove (23), a hollow special-shaped column (82) is inserted into the special-shaped groove (81), a positioning piece (83) is fixedly connected to the top of the special-shaped column (82), the positioning groove (84) is arranged at the bottom of the upper rod body (21), and an elastic piece (85) is sleeved on the outer wall of the special-shaped column (82).

10. The anti-drop ball valve seat with quick disassembly and assembly function according to claim 9, characterized in that: An L-shaped rotating column (86) is fixedly connected to the top end of the positioning member (83); the rotating column (86) passes through the upper rod body (21); and a limiting groove (24) is provided at the top end of the upper rod body (21).

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