Blowout preventer pre-ram

Abstract

The application discloses a front blowout preventer box and belongs to the field of drilling exploration, which comprises a support frame, a first mounting seat and a second mounting seat are slidably arranged on the support frame, arc-shaped grooves for placing drill pipes are arranged on the side walls of the first mounting seat and the second mounting seat which are close to each other, arc-shaped air bags for improving sealing performance are arranged in the first mounting seat and the second mounting seat, the arc-shaped air bags abut against the drill pipes, a closing assembly for closing the connection part of the drill pipe is arranged in the first mounting seat, a gas pump for inflating the arc-shaped air bags is arranged on the first mounting seat, and a first driving assembly for driving the first mounting seat and the second mounting seat to close is arranged on the support frame. The application has the effect of preventing mud splashing after the drill pipe is disassembled.

Description

Technical Field

[0001] This application relates to the field of drilling and mining, and in particular to front blowout preventers. Background Technology

[0002] In order to mine underground or seabed resources, or to obtain physical samples for testing and to obtain relevant data, operators use drilling technology to drill into deep strata. To increase drilling depth, the drill rods used for drilling are spliced ​​together using a multi-segment threaded connection method.

[0003] After the drill pipe is extracted, the operators need to remove and dismantle it. Since some mud will remain inside the drill pipe during drilling, mud will splash at the joints of the drill pipe during dismantling, causing certain safety hazards and affecting the drill pipe dismantling process. Summary of the Invention

[0004] To prevent mud splashing after drill pipe disassembly, this application provides a front-mounted blowout preventer.

[0005] The front-mounted popout box provided in this application adopts the following technical solution:

[0006] A front-mounted blowout preventer includes a support frame, on which a first mounting base and a second mounting base are slidably mounted. Both the first and second mounting bases have arc-shaped grooves on their adjacent sidewalls for placing drill pipes. Arc-shaped airbags for improving sealing are provided inside both the first and second mounting bases. The arc-shaped airbags abut against the drill pipes. A sealing component for sealing the drill pipe connection is provided inside the first mounting base. An air pump for inflating the arc-shaped airbags is provided on the first mounting base. A first driving component for driving the first and second mounting bases to close is provided on the support frame.

[0007] By adopting the above technical solution, the first drive component drives the first mounting seat and the second mounting seat to move and close. After the first mounting seat and the second mounting seat close, they clamp the drill rod connection. At this time, the drill rod connection is located between the first mounting seat and the second mounting seat. When the drill rod is disassembled, the sealing component seals the drill rod connection. At the same time, the air pump inflates the arc-shaped airbag to seal both ends of the connection. When the operator disassembles the drill rod, the drill rod rotates. The arc-shaped airbag can ensure the sealing of both ends of the drill rod connection. At the same time, the arc-shaped airbag does not affect the rotation and disassembly of the drill rod. Soil will splash into the first mounting seat and the second mounting seat and will not splash into the external environment, ensuring construction safety.

[0008] Preferably, the sealing component includes a flexible airbag, which is slidably disposed within the arcuate groove on the first mounting base. The flexible airbag is disposed within the first mounting base, and both the first and second mounting bases are provided with limiting grooves. A support rod is fixedly connected to the end of the flexible airbag, and a pulley is provided on the support rod. The pulley is slidably connected to the limiting groove. A second driving component for driving the flexible airbag to deploy is provided on the first mounting base.

[0009] By adopting the above technical solution, after the first drive component drives the first mounting base and the second mounting base to close and clamp the drill rod, the second drive component drives the flexible airbag to unfold. The support rod guides the flexible airbag to move along the direction of the limiting slide groove and wraps the drill rod connection. When disassembling, the air pump inflates the flexible airbag to wrap the drill rod connection. Then, when the operator rotates the drill rod to disassemble it, the mud at the drill rod connection will splash onto the flexible airbag, which will not affect the operator's normal work. The setting of pulleys and limiting slide grooves can improve the stability of the flexible airbag when it unfolds.

[0010] Preferably, the second driving component includes a first half-gear ring and a first electromagnet. The first half-gear ring is slidably disposed within the first mounting base. The first mounting base has a first receiving groove for sliding engagement with the first half-gear ring. A connecting rod is fixedly connected to the first half-gear ring. The first electromagnet is slidably disposed within a limiting groove on the first mounting base. The connecting rod is fixedly connected to the first electromagnet. The end of the connecting rod away from the first electromagnet passes through the first receiving groove and is fixedly connected to the first half-gear ring. A second electromagnet is disposed on the support rod. A second half-gear ring is slidably disposed within the second mounting base. The second half-gear ring abuts against the first half-gear ring. A second receiving groove for sliding engagement with the second half-gear ring is provided within the second mounting base. A third driving component for driving the first half-gear ring to rotate is disposed on the first mounting base.

[0011] By adopting the above technical solution, after the first mounting base and the second mounting base clamp the drill rod, the first electromagnet and the second electromagnet are activated and attract each other. Then, the third drive component drives the first half-gear ring to rotate. The rotation of the first half-gear ring causes the connecting rod to move. The movement of the connecting rod causes the first electromagnet to move. The movement of the first electromagnet causes the second electromagnet to move. The movement of the second electromagnet drags the support rod to move. The movement of the support rod causes the flexible airbag to unfold and wrap around the drill rod. Then, the air pump inflates the flexible airbag and the arc-shaped airbag to wrap around the drill rod and the drill rod connection.

[0012] Preferably, the third drive component includes a first motor and a first spur gear. The first motor is mounted on the first mounting base, and the output end of the first motor passes through the first receiving groove. The first spur gear is fixedly sleeved on the output end of the first motor. The first spur gear meshes with the first half-gear ring, and the second half-gear ring can mesh with the first spur gear.

[0013] By adopting the above technical solution, after the first mounting base and the second mounting base clamp the drill rod, the first electromagnet and the second electromagnet are activated, and the first electromagnet and the second electromagnet attract each other. The first motor is activated, and the first motor drives the first spur gear to rotate. The rotation of the first spur gear causes the first half gear ring to rotate. The rotation of the first half gear ring causes the connecting rod to move along the direction of the limiting slide groove. The movement of the connecting rod causes the first electromagnet to move. The movement of the first electromagnet causes the second electromagnet to move. The movement of the second electromagnet drags the support rod to move. The movement of the support rod causes the flexible airbag to unfold and wrap around the drill rod. Then, the air pump inflates the flexible airbag and the arc-shaped airbag to wrap around the drill rod and the drill rod connection.

[0014] Preferably, the first mounting base is provided with an auxiliary airbag for closing the gap of the flexible airbag, the first mounting base is provided with a first sliding groove for sliding and cooperating with the auxiliary airbag, the first sliding groove is connected to the second receiving groove, and the second mounting base is provided with a control component for driving the deployment of the auxiliary airbag.

[0015] By adopting the above technical solution, when the first mounting seat and the second mounting seat clamp the drill rod, and the flexible airbag unfolds to wrap the drill rod connection, a certain gap will be generated at both ends of the flexible airbag. At the same time, the control component drives the auxiliary airbag to unfold and seal the gap at the end of the flexible airbag. The flexible airbag and the auxiliary airbag cooperate with each other to ensure the sealing of the drill rod connection and further prevent soil splashing when the drill rod is disassembled.

[0016] Preferably, the control component includes a drive screw and a connecting plate. The connecting plate is fixedly connected to the end of the auxiliary airbag. The drive screw is rotatably installed in the first sliding groove. The drive screw passes through the connecting plate and is threadedly engaged with the connecting plate. A second spur gear is fixedly sleeved on the drive screw, and the second spur gear meshes with the first half gear ring.

[0017] By adopting the above technical solution, when the first mounting base and the second mounting base clamp the drill rod, the first electromagnet and the second electromagnet are activated, and the first electromagnet and the second electromagnet attract each other. The first motor is activated, and the first motor drives the first spur gear to rotate. The rotation of the first spur gear causes the first half gear ring to rotate. The first half gear ring simultaneously causes the second spur gear to rotate. The rotation of the second spur gear causes the drive screw to rotate. The rotation of the drive screw causes the connecting plate to move in the first slide groove. The movement of the connecting plate causes the auxiliary airbag to deploy.

[0018] Preferably, the first drive assembly includes a control screw and a second motor. The second motor is mounted on the support frame. One end of the control screw is fixedly connected to the output end of the second motor. The control screw passes through the first mounting base and the second mounting base. Both the first mounting base and the second mounting base are threadedly engaged with the control screw. The end of the control screw away from the second motor is rotatably connected to the support frame. A limit rod is fixedly connected to the support frame. The limit rod passes through the first mounting base and the second mounting base. Both the first mounting base and the second mounting base are slidably engaged with the limit rod.

[0019] By adopting the above technical solution, when it is necessary to disassemble the drill rod, the operator moves the support frame to place the drill rod between the first mounting seat and the second mounting seat. The operator starts the second motor, which drives the control screw to rotate. The rotation of the control screw makes the first mounting seat and the second mounting seat move closer to each other and clamp the drill rod. The setting of the limit rod can prevent the first mounting seat and the second mounting seat from rotating when moving towards the drill rod.

[0020] Preferably, a sealing gasket is provided on the side wall of the first mounting base near the second mounting base, and a third receiving groove is provided on the second mounting base for insertion and mating with the sealing gasket.

[0021] By adopting the above technical solution, the sealing gasket can further improve the sealing performance when the first mounting seat and the second mounting seat are closed.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The first drive assembly drives the first and second mounting seats to move and close. After the first and second mounting seats close, they clamp the drill rod connection. At this time, the drill rod connection is located between the first and second mounting seats. When the drill rod is disassembled, the sealing assembly seals the drill rod connection. At the same time, the air pump inflates the arc-shaped airbag to seal both ends of the connection. When the operator disassembles the drill rod, the drill rod rotates. The arc-shaped airbag can ensure the sealing of both ends of the drill rod connection. At the same time, the arc-shaped airbag does not affect the rotation and disassembly of the drill rod. Soil will splash into the first and second mounting seats and will not splash into the external environment, ensuring construction safety.

[0024] 2. By setting up a flexible airbag, the second drive component causes the flexible airbag to deploy and seal the drill pipe connection, which can effectively prevent soil from splashing during drill pipe disassembly.

[0025] 3. When the first mounting base and the second mounting base clamp the drill pipe, the flexible airbag unfolds to wrap the drill pipe connection. A certain gap will be generated at both ends of the flexible airbag. At the same time, the control component drives the auxiliary airbag to unfold and seal the gap at the end of the flexible airbag. The flexible airbag and the auxiliary airbag cooperate with each other to ensure the sealing of the drill pipe connection and further prevent soil splashing when the drill pipe is disassembled.

[0026] 4. By setting a sealing gasket, the sealing performance between the first and second mounting seats can be further improved, preventing soil from overflowing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the front-mounted spray guard according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the structure of the sealing gasket according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the structure of the closed component according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the structure of the third driving component in an embodiment of this application.

[0031] Figure 5 yes Figure 4 A schematic diagram of the structure at point A in the middle.

[0032] Figure 6 This is a schematic diagram of the structure of the control component according to an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Support frame; 11. First mounting base; 111. Arc-shaped groove; 12. Second mounting base; 13. Arc-shaped airbag; 14. Air pump; 15. First motor; 16. First spur gear; 2. Sealing assembly; 21. Flexible airbag; 211. Limiting slide groove; 22. Support rod; 23. Pulley; 24. First half-gear ring; 241. First receiving groove; 25. First electromagnet; 26. Connecting rod; 27. Second electromagnet; 28. Second half-gear ring; 281. Second receiving groove; 3. Control assembly; 31. Auxiliary airbag; 311. First slide groove; 32. Drive screw; 33. Connecting plate; 34. Second spur gear; 4. First drive assembly; 41. Control screw; 42. Second motor; 43. Limiting rod; 44. Sealing gasket; 441. Third receiving groove. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0036] This application discloses a front-mounted popscreen box. (See also...) Figure 1 The front-mounted popout box includes a support frame 1.

[0037] Reference Figure 1 as well as Figure 2 The support frame 1 is horizontally arranged, and a first mounting seat 11 and a second mounting seat 12 are provided on the support frame 1. The first mounting seat 11 and the second mounting seat 12 are symmetrically arranged along the axis of the support frame 1. A limit rod 43 is horizontally provided on the support frame 1. The limit rod 43 is fixedly connected to the support frame 1 and passes through the first mounting seat 11 and the second mounting seat 12. The first mounting seat 11 and the second mounting seat 12 are both slidably engaged with the limit rod 43.

[0038] Reference Figure 1 A first drive assembly 4 is provided on the support frame 1. The first drive assembly 4 includes a control screw 41 and a second motor 42. The control screw 41 is horizontally mounted on the support frame 1 and is rotatably connected to the support frame 1. The second motor 42 is fixedly connected to the support frame 1. The output end of the second motor 42 passes through the support frame 1 and is fixedly connected to the control screw 41. The output end of the second motor 42 is rotatably connected to the support frame 1.

[0039] Reference Figure 2 as well as Figure 3 Several sealing gaskets 44 are fixedly connected to the side walls of the first mounting base 11 and the second mounting base 12, which are close to each other. The sealing gaskets 44 on the first mounting base 11 and the sealing gaskets 44 on the second mounting base 12 are staggered. Several third receiving grooves 441 are formed on the first mounting base 11 and the second mounting base 12 along their vertical direction. The sealing gaskets 44 are inserted into the third receiving grooves 441, and the sealing gaskets 44 and the third receiving grooves 441 correspond one-to-one.

[0040] Reference Figure 2 as well as Figure 3 Two arc-shaped airbags 13 are provided in both the first mounting base 11 and the second mounting base 12. The two arc-shaped airbags 13 on the first mounting base 11 are located at the upper and lower ends of the first mounting base 11, respectively, and the two arc-shaped airbags 13 on the second mounting base 12 are located at the upper and lower ends of the second mounting base 12, respectively. The arc-shaped airbags 13 on the first mounting base 11 and the arc-shaped airbags 13 on the second mounting base 12 are positioned correspondingly and abut against each other. The arc-shaped airbags 13 on the first mounting base 11 and the arc-shaped airbags 13 on the second mounting base 12 are symmetrically arranged along the contact area between the first mounting base 11 and the second mounting base 12. An air pump 14 is provided on the top surface of the first mounting base 11, and the air pump 14 is used to inflate the arc-shaped airbags 13.

[0041] Reference Figure 3 as well as Figure 4 Both the first mounting base 11 and the second mounting base 12 have arc-shaped grooves 111 on their sidewalls that are close to each other. The arc-shaped grooves 111 are adapted to the shape of the drill rod.

[0042] Reference Figure 3 as well as Figure 5 A sealing component 2, including a flexible airbag 21, is provided inside the first mounting base 11. The flexible airbag 21 is slidably disposed within the first mounting base 11. One end of the flexible airbag 21 is fixedly connected to the inner sidewall of the arc-shaped groove 111, and the other end of the flexible airbag 21 is fixedly connected to a support rod 22. The support rod 22 is vertically arranged, and a second electromagnet 27 is provided at the top of the support rod 22. Pulleys 23 are provided at the bottom of the support rod 22 and on the second electromagnet 27.

[0043] Reference Figure 3 as well as Figure 4 The first mounting base 11 has a limiting groove 211 circumferentially formed around the arc-shaped groove 111, and the second mounting base 12 also has a limiting groove 211 circumferentially formed around the arc-shaped groove 111. There are two limiting grooves 211 on the first mounting base 11 and two limiting grooves 211 on the second mounting base 12, and the limiting grooves 211 on the first mounting base 11 and the second mounting base 12 correspond to each other. When the first mounting base 11 and the second mounting base 12 are closed, the limiting grooves 211 on the first mounting base 11 and the limiting grooves 211 on the second mounting base 12 are connected.

[0044] Reference Figure 4 as well as Figure 5 The pulley 23 on the support rod 22 and the second electromagnet 27 are both set in the limiting groove 211, and the pulley 23 slides and cooperates with the inner side wall of the limiting groove 211.

[0045] Reference Figure 3 as well as Figure 5 A second driving assembly is provided on the first mounting base 11. The second driving assembly includes a first half-gear ring 24 and a first electromagnet 25. The first half-gear ring 24 is slidably disposed in the top end of the first mounting base 11. A first receiving groove 241 is provided in the first mounting base 11. The first receiving groove 241 has a semi-circular cross-section. The first half-gear ring 24 slides and engages with the inner sidewall of the first receiving groove 241.

[0046] Reference Figure 5 as well as Figure 6 A connecting rod 26 is fixedly connected to the bottom of the first half-gear ring 24. The connecting rod 26 is vertically arranged, and the end of the connecting rod 26 away from the first half-gear ring 24 passes into the limiting slide groove 211. The first electromagnet 25 is slidably disposed in the limiting slide groove 211 at the top of the first mounting base 11. The first electromagnet 25 slides and engages with the inner side wall of the limiting slide groove 211, and a pulley 23 is also provided on the first electromagnet 25. The end of the connecting rod 26 located in the limiting slide groove 211 is fixedly connected to the first electromagnet 25, and the first electromagnet 25 engages with the second electromagnet 27.

[0047] Reference Figure 5 as well as Figure 6 A second half-tooth ring 28 is slidably disposed within the end of the second mounting base 12 near the end of the first electromagnet 25. A second receiving groove 281 is formed within the second mounting base 12, and the second half-tooth ring 28 slides into contact with the inner wall of the second receiving groove 281. The first receiving groove 241 and the second receiving groove 281 are symmetrically arranged along the contact area between the first mounting base 11 and the second mounting base 12, and the first receiving groove 241 and the second receiving groove 281 are connected. The first half-tooth ring 24 and the second half-tooth ring 28 abut against each other.

[0048] Reference Figure 3 as well as Figure 6 A third drive assembly is provided on the first mounting base 11, which includes a first motor 15 and a first spur gear 16. The first motor 15 is vertically mounted on the first mounting base 11 and is fixedly connected to the first mounting base 11. The output end of the first motor 15 passes into the first receiving groove 241, and the first spur gear 16 is fixedly sleeved on the end of the first motor 15 located in the first receiving groove 241. The first spur gear 16 meshes with the first half-gear ring 24 and can mesh with the second half-gear ring 28.

[0049] Reference Figure 5 as well as Figure 6An auxiliary airbag 31 is vertically disposed within the first mounting base 11. A first sliding groove 311 is formed along the height direction within the first mounting base 11, and the first sliding groove 311 has a rectangular cross-section. The auxiliary airbag 31 is disposed within the first sliding groove 311, and the auxiliary airbag 31 slides and engages with the inner sidewall of the first sliding groove 311. The auxiliary airbag 31 is used to seal the port of the flexible airbag 21, thereby improving the sealing performance of the flexible airbag 21.

[0050] Reference Figure 5 as well as Figure 6 A control component 3 is provided inside the first mounting base 11. The control component 3 includes a drive screw 32 and a connecting plate 33. The drive screw 32 is installed in the first slide groove 311, and the bottom end of the drive screw 32 is rotatably connected to the inner end wall of the first slide groove 311. One end of the connecting plate 33 is fixedly connected to the top end of the auxiliary airbag 31, and the other end of the connecting plate 33 is sleeved on the top end of the drive screw 32. The connecting plate 33 and the drive screw 32 are threaded together, and the connecting plate 33 is slidably engaged with the inner side wall of the first slide groove 311.

[0051] Reference Figure 5 as well as Figure 6 The first sliding groove 311 is connected to the first receiving groove 241, and the top end of the drive screw 32 is rotatably connected to the inner top surface of the first receiving groove 241. A second spur gear 34 is fixedly sleeved on the top end of the drive screw 32, and the second spur gear 34 meshes with the first half gear ring 24.

[0052] The implementation principle of the front blowout preventer in this embodiment is as follows: When it is necessary to disassemble the drill rod, the operator moves the support frame 1 to place the drill rod between the first mounting base 11 and the second mounting base 12. The operator starts the second motor 42, which drives the control screw 41 to rotate. The rotation of the control screw 41 makes the first mounting base 11 and the second mounting base 12 move closer to each other and clamp the drill rod.

[0053] After the first mounting base 11 and the second mounting base 12 clamp the drill rod, the first electromagnet 25 and the second electromagnet 27 are activated and attract each other. Then, the first motor 15 is activated and drives the first spur gear 16 to rotate. The rotation of the first spur gear 16 causes the first half gear ring 24 to rotate. The rotation of the first half gear ring 24 causes the connecting rod 26 to move along the direction of the limiting slide groove 211. The movement of the connecting rod 26 causes the first electromagnet 25 to move. The movement of the first electromagnet 25 causes the second electromagnet 27 to move. The movement of the second electromagnet 27 drags the support rod 22 to move. The movement of the support rod 22 causes the flexible airbag 21 to unfold along the circumferential direction of the limiting slide groove 211 and wrap the drill rod. Then, the air pump 14 inflates the flexible airbag 21 and the arc-shaped airbag 13 to wrap the drill rod and the drill rod connection.

[0054] When the first motor 15 drives the first spur gear 16 to rotate the first half gear ring 24, the first half gear ring 24 simultaneously causes the second spur gear 34 to rotate. The rotation of the second spur gear 34 causes the drive screw 32 to rotate. The rotation of the drive screw 32 causes the connecting plate 33 to move within the first slide groove 311. The movement of the connecting plate 33 causes the auxiliary airbag 31 to unfold. The unfolded auxiliary airbag 31 seals the end of the flexible airbag 21 to improve the sealing performance of the flexible airbag 21. Then, the air pump 14 inflates the arc-shaped airbag 13, the flexible airbag 21, and the auxiliary airbag 31. The inflated arc-shaped airbag 13, the flexible airbag 21, and the auxiliary airbag 31 simultaneously seal the drill rod connection. At this time, when the operator rotates and dismantles the drill rod, the inflated arc-shaped airbag 13, the flexible airbag 21, and the auxiliary airbag 31 block the soil and prevent soil splashing.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A front-mounted pop filter, including a support frame (1), characterized in that: The support frame (1) is slidably provided with a first mounting seat (11) and a second mounting seat (12). The side walls of the first mounting seat (11) and the second mounting seat (12) that are close to each other are provided with arc-shaped grooves (111) for placing drill rods. Arc-shaped airbags (13) for improving sealing are provided in the first mounting seat (11) and the second mounting seat (12). The arc-shaped airbags (13) abut against the drill rods. A sealing component (2) for sealing the drill rod connection is provided in the first mounting seat (11). An air pump (14) for inflating the arc-shaped airbags (13) is provided on the first mounting seat (11). A first driving component (4) for driving the first mounting seat (11) and the second mounting seat (12) to close is provided on the support frame (1). The enclosed component (2) includes a flexible airbag (21), which is slidably disposed in the arc-shaped groove (111) on the first mounting base (11). The flexible airbag (21) is disposed in the first mounting base (11). Both the first mounting base (11) and the second mounting base (12) are provided with limiting grooves (211). A support rod (22) is fixedly connected to the end of the flexible airbag (21). A pulley (23) is provided on the support rod (22). The pulley (23) is slidably connected to the limiting groove (211). A second driving component for driving the flexible airbag (21) to unfold is provided on the first mounting base (11). The second driving assembly includes a first half-gear ring (24) and a first electromagnet (25). The first half-gear ring (24) is slidably disposed within the first mounting base (11). The first mounting base (11) has a first receiving groove (241) for sliding cooperation with the first half-gear ring (24). A connecting rod (26) is fixedly connected to the first half-gear ring (24). The first electromagnet (25) is slidably disposed within a limiting groove (211) on the first mounting base (11). The connecting rod (26) is fixedly connected to the first electromagnet (25). The connecting rod (26) is located away from the first electromagnet. The end of the first electromagnet (25) is inserted into the first receiving groove (241) and fixedly connected to the first half-tooth ring (24). A second electromagnet (27) is provided on the support rod (22). A second half-tooth ring (28) is slidably provided in the second mounting base (12). The second half-tooth ring (28) abuts against the first half-tooth ring (24). A second receiving groove (281) for sliding cooperation with the second half-tooth ring (28) is opened in the second mounting base (12). A third driving component for driving the first half-tooth ring (24) to rotate is provided on the first mounting base (11). The third drive assembly includes a first motor (15) and a first spur gear (16). The first motor (15) is mounted on the first mounting base (11). The output end of the first motor (15) passes into the first receiving groove (241). The first spur gear (16) is fixedly sleeved on the output end of the first motor (15). The first spur gear (16) meshes with the first half-gear ring (24). The second half-gear ring (28) can mesh with the first spur gear (16).

2. The front-mounted pop filter according to claim 1, characterized in that: The first mounting base (11) is provided with an auxiliary airbag (31) for closing the gap of the flexible airbag (21). The first mounting base (11) is provided with a first sliding groove (311) for sliding cooperation with the auxiliary airbag (31). The first sliding groove (311) is connected to the second receiving groove (281). The second mounting base (12) is provided with a control component (3) for driving the auxiliary airbag (31) to unfold.

3. The front-mounted pop filter according to claim 2, characterized in that: The control component (3) includes a drive screw (32) and a connecting plate (33). The connecting plate (33) is fixedly connected to the end of the auxiliary airbag (31). The drive screw (32) is rotatably installed in the first slide groove (311). The drive screw (32) passes through the connecting plate (33). The drive screw (32) is threadedly engaged with the connecting plate (33). A second spur gear (34) is fixedly sleeved on the drive screw (32). The second spur gear (34) meshes with the first half gear ring (24).

4. The front-mounted pop filter according to claim 1, characterized in that: The first drive assembly (4) includes a control screw (41) and a second motor (42). The second motor (42) is mounted on the support frame (1). One end of the control screw (41) is fixedly connected to the output end of the second motor (42). The control screw (41) passes through the first mounting seat (11) and the second mounting seat (12). The first mounting seat (11) and the second mounting seat (12) are threadedly engaged with the control screw (41). The end of the control screw (41) away from the second motor (42) is rotatably connected to the support frame (1). A limit rod (43) is fixedly connected on the support frame (1). The limit rod (43) passes through the first mounting seat (11) and the second mounting seat (12). The first mounting seat (11) and the second mounting seat (12) are slidably engaged with the limit rod (43).

5. The front-mounted pop filter according to claim 1, characterized in that: A sealing gasket (44) is provided on the side wall of the first mounting base (11) near the second mounting base (12), and a third receiving groove (441) is provided on the second mounting base (12) for inserting and engaging with the sealing gasket (44).

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