A pneumatic fireproof airtight butterfly valve

Abstract

The present application relates to a pneumatic fireproof airtight butterfly valve, comprising a mounting plate, a base plate, and a butterfly valve body. The butterfly valve body comprises a valve body and an actuator, the actuator being used to control the opening and closing of the valve body. The mounting plate is mounted on the base plate. A through hole is provided on the mounting plate for mounting the valve body, the valve body abuts against the inner wall of the through hole, and a receiving groove for mounting the actuator is provided within the mounting plate. The mounting plate is installed in a pipeline, a mounting groove for mounting the base plate is provided at the bottom of the pipeline, the base plate abuts against the inner wall of the mounting groove, and both sides of the mounting plate abut against the inner wall of the pipeline. A limiting groove is provided on the inner wall of the top of the pipeline to cooperate with the top of the mounting plate. A first positioning member is provided at the top of the mounting plate, and a second positioning member is provided within the base plate. The present application facilitates the installation of a butterfly valve on a pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline fire protection structures, and in particular to a pneumatic fire-proof airtight butterfly valve. Background Art

[0002] In all types of buildings, especially high-rise buildings, the chimney effect of hot smoke can cause smoke to spread rapidly once a fire breaks out. Numerous fire incidents have demonstrated that smoke is the primary factor hindering evacuation and firefighting efforts, and the leading cause of casualties in fires. Fire dampers are installed on pipes used for ventilation and other equipment. They are normally open. In the event of a fire, they automatically close when the gas temperature in the pipe reaches a certain level. This closure interrupts the flow of smoke and prevents the spread of fire. Therefore, the use and performance of fire dampers are crucial in firefighting equipment.

[0003] In the related art, it is inconvenient to install and disassemble the airtight fire damper installed in the ventilation duct, which will cause difficulties and inconvenience in use when repair and replacement are required due to problems.

[0004] Based on the above problems, the pneumatic fireproof airtight butterfly valve of the present application is proposed to solve the above technical problems. Summary of the Invention

[0005] In response to the problems existing in the prior art, this application discloses a pneumatic fireproof airtight butterfly valve, which specifically includes the following technical solutions:

[0006] The cam is secured to the bottom of the valve body with a secure grip on the valve body, and the cam is secured to the bottom of the valve body with a secure grip on the valve body.

[0007] Through the above scheme, the structure of the mounting plate and the base plate is used, the valve body is set on the mounting plate, the mounting plate is installed on the base plate, and the base plate and the ventilation duct are installed and connected. During installation, the mounting plate cooperates with the limiting groove on the pipe through the first positioning member, and the base plate cooperates with the mounting groove on the pipe through the second positioning member, thereby realizing the overall installation connection and making the installation more convenient.

[0008] Exemplarily, a positioning groove is provided in the mounting plate, the first positioning member includes a positioning block provided in the positioning groove, the positioning block is slidably installed in the positioning groove, a return spring is provided in the positioning groove, the two ends of the return spring are respectively connected to the positioning block and the end inner wall of the positioning groove, the limiting groove is provided with a card groove that cooperates with the end of the positioning block, the end of the positioning block is provided with an inclined slope, and the inclination direction of the slope is inclined from top to bottom in the direction away from the return spring.

[0009] Through the above scheme, using the structure of the above-mentioned first positioning member, when the top of the mounting plate is sent into the limiting groove, the inner wall of the limiting groove squeezes the positioning block, causing the positioning block to move toward the inside of the positioning groove, making it convenient for the top of the mounting plate to enter the limiting groove. Under the action of the reset spring, the positioning block pops out and cooperates with the slot, and the positioning block and the slot cooperate to achieve the initial positioning of the mounting plate.

[0010] Exemplarily, transverse holes are provided at both ends of the base plate, the second positioning member includes a positioning rod slidably installed in the transverse hole, a card hole that cooperates with the end of the positioning rod is provided on the inner wall of the installation groove, and a driving member for driving the positioning rod is provided in the base plate.

[0011] Through the above solution, the positioning rod is moved by the driving member, and the positioning rod enters the clamping hole, thereby realizing the connection between the base plate and the pipeline.

[0012] Exemplarily, a control groove is provided in the base plate, and the driving member includes a driving rod provided in the control groove, a connecting block is fixedly provided in the control groove, and the driving rod is rotatably mounted on the connecting block, one end of the driving rod is located in the control groove, and the other end is located in the transverse hole, a driving block is movably mounted in the transverse hole, a threaded hole is provided on the driving block, an external thread is provided on the driving rod and is threadedly matched with the threaded hole, and when the driving rod rotates, the driving block is driven to move in the transverse hole; a first piston is provided at one end of the driving block close to the positioning rod, and a second piston is provided at the end of the positioning rod, the first piston and the second piston are movably mounted in the transverse hole and abut against the inner wall of the transverse hole.

[0013] Through the above scheme, when the driving rod rotates, the driving block can be driven to move horizontally, and the driving block drives the first piston to move. The first piston increases the internal air pressure of the transverse hole, causing the second piston to move, and the second piston drives the positioning rod to move and cooperate with the card hole.

[0014] Exemplarily, the driving member also includes a turntable arranged in the control groove, the turntable is rotatably installed at the bottom of the control groove, a first bevel gear is provided on the top of the turntable, and a second bevel gear is provided on the end of the driving rod, and the first bevel gear and the second bevel gear are meshed; the turntable is rotatably connected to the base plate through a rotating shaft, the rotating shaft extends downward to the outside of the base plate, and a rotating handle is detachably installed at one end of the rotating shaft.

[0015] Through the above scheme, the turntable can be driven to rotate by rotating the handle, thereby driving the first bevel gear and the second bevel gear to rotate, thereby realizing the rotation of the driving rod. When the driving rod rotates, it drives the driving block to move. The movement of the first piston squeezes the air in the transverse hole, thereby realizing the movement of the second piston, driving the positioning rod, and the end of the positioning rod cooperates with the card hole to realize the cooperation between the base plate and the mounting groove.

[0016] Exemplarily, an annular groove is provided on the mounting plate, an airbag strip is provided in the annular groove, and a vent hole is provided in the mounting plate. One end of the vent hole is connected to the transverse hole, and the other end extends to the annular groove and is connected to the airbag strip. The connection between the vent hole and the transverse hole is located between the first piston and the second piston, and the airbag strip is against the inner wall of the limiting groove.

[0017] The above solution adds a vent hole and an airbag strip structure. When the first piston moves, the air pressure in the transverse hole increases. Air in the transverse hole enters the airbag strip through the vent hole, causing the airbag strip to expand and abut against the inner wall of the retaining groove. This makes the connection between the mounting plate and the retaining groove more stable and more airtight. The rotation of the turntable not only achieves the fit between the positioning rod and the retaining hole, but also enables the expansion of the airbag strip, making it more convenient to use.

[0018] Exemplarily, an extension plate is provided at the bottom of the base plate, a groove cooperating with the extension plate is provided at the bottom of the pipe, a sealing gasket is provided at the top of the extension plate, and the sealing gasket abuts against the groove.

[0019] With the above solution, by cooperating with the extension plate and the groove and adding the structure of the sealing gasket, the base plate has better air tightness after installation.

[0020] Exemplarily, an extrusion block is provided in the slot, a strip hole matching the slot is provided on the top of the pipe, a movable rod is connected to the top of the extrusion block, the extrusion block is movably installed in the slot and abuts against the positioning block, and the movable rod is movably installed in the strip hole.

[0021] Through the above scheme, when disassembly is required, the extrusion block can be driven to move by sliding the movable rod. When the extrusion block moves, it squeezes the positioning block, so that the positioning block returns to the positioning groove and no longer cooperates with the card slot, so that the mounting plate and the pipe can be separated.

[0022] This application has at least the following technical effects:

[0023] 1. Use the structure of the mounting plate and the base plate, set the valve body on the mounting plate, install the mounting plate on the base plate, and install and connect the base plate, the mounting plate and the ventilation duct. During installation, the mounting plate cooperates with the limiting groove on the duct through the first positioning piece, and the base plate cooperates with the mounting groove on the duct through the second positioning piece, thereby realizing the overall installation connection and making the installation more convenient.

[0024] 2. The second positioning member uses a positioning rod structure, and a turntable and bevel gear structure is used in the base plate. The rotation of the turntable drives the bevel gear to rotate, thereby rotating the drive rod, and then driving the drive block to move. During the movement, the first piston and the second piston are driven to move, thereby moving the positioning rod, realizing the cooperation between the positioning rod and the card hole, and realizing the connection between the base plate and the mounting groove; in addition, an airbag strip structure is added. When the first piston moves, the airbag will also be inflated, so that the airbag and the inner wall of the limit groove are pressed tightly, making the connection between the mounting plate and the pipeline more stable and enhancing its sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic cross-sectional view of the main structure in an embodiment of the present application.

[0026] Figure 2 This is a schematic diagram of the mounting plate structure in an embodiment of the present application.

[0027] Figure 3 for Figure 1 Enlarged schematic diagram of part A.

[0028] Figure 4 for Figure 1 Enlarged schematic diagram of part B.

[0029] Figure numerals: 1. Base plate; 11. Extension plate; 12. Control groove; 13. Turntable; 14. Rotating shaft; 15. First bevel gear; 16. Turning handle; 17. Second bevel gear; 18. Connecting block; 19. Drive rod; 2. Mounting plate; 21. Through hole; 22. Accommodating groove; 23. Valve body; 24. Actuator; 25. Annular groove; 26. Airbag strip; 27. Vent; 3. Pipeline; 31. Mounting groove; 32. Limiting groove; 33. Sealing gasket; 34. Clamping hole; 4. Positioning groove; 41. Return spring; 42. Positioning block; 43. Extrusion block; 44. Movable rod; 45. Strip hole; 46. Clamping groove; 5. Horizontal hole; 51. Positioning rod; 52. Drive block; 53. First piston; 54. Second piston; 55. Threaded hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] Reference Figure 1-Figure 4 The embodiment of the present application provides a pneumatic fireproof airtight butterfly valve, comprising a mounting plate 2, a base plate 1 and a butterfly valve body. The butterfly valve body comprises a valve body 23 and an actuator 24. The actuator 24 is used to control the opening and closing of the valve body 23. The valve body 23 and the actuator 24 are mounted on the mounting plate 2, and the mounting plate 2 is mounted on the base plate 1. A through hole 21 for mounting the valve body 23 is provided on the mounting plate 2. The valve body 23 is tightly abutted against the inner wall of the through hole 21. A receiving groove 22 for mounting the actuator 24 is provided in the mounting plate 2. The through hole 21 on the mounting plate 2 passes through the mounting plate 2. The valve body 23 is located in the through hole 21. When the valve body 23 is open, gas passes through. When the valve body 23 is closed, it serves to isolate smoke.

[0032] Mounting plate 2 is installed in pipe 3. A mounting groove 31 for base plate 1 is defined at the bottom of pipe 3, extending through the bottom of pipe 3. Base plate 1 abuts against the inner wall of mounting groove 31, while the sides of mounting plate 2 abut against the inner wall of pipe 3. A retaining groove 32 is defined on the inner wall of the top of pipe 3, which mates with the top of mounting plate 2. A first locating member is provided at the top of mounting plate 2, connecting mounting plate 2 and pipe 3. A second locating member is provided within base plate 1, connecting base plate 1 and pipe 3.

[0033] For example, the bottom of the base plate 1 is provided with an extension plate 11, the bottom of the pipe 3 is provided with a groove that mates with the extension plate 11, and the top of the extension plate 11 is provided with a sealing gasket 33, which abuts against the groove. The fit between the extension plate 11 and the groove and the addition of the sealing gasket 33 provide the base plate 1 with improved airtightness after installation.

[0034] The first positioning member is used to fix the mounting plate 2 to achieve the connection between the mounting plate 2 and the pipe 3. The second positioning member is used to fix the base plate 1 to achieve the connection between the base plate 1 and the pipe 3, and finally to achieve the installation of the valve body 23. A positioning groove 4 is provided in the mounting plate 2. The first positioning member includes a positioning block 42 provided in the positioning groove 4. The positioning block 42 is slidably installed in the positioning groove 4. A return spring 41 is provided in the positioning groove 4. The two ends of the return spring 41 are respectively connected to the positioning block 42 and the inner wall of the end of the positioning groove 4. The limiting groove 32 is provided with a clamping groove 46 that cooperates with the end of the positioning block 42. The end of the positioning block 42 is provided with an inclined slope, and the inclination direction of the slope is from top to bottom in a direction away from the return spring 41. Using the structure of the above-mentioned first positioning member, when the top of the mounting plate 2 is sent into the limiting groove 32, the inner wall of the limiting groove 32 squeezes the positioning block 42, causing the positioning block 42 to move toward the inside of the positioning groove 4, making it convenient for the top of the mounting plate 2 to enter the limiting groove 32. Under the action of the reset spring 41, the positioning block 42 pops out and cooperates with the card slot 46. The positioning block 42 and the card slot 46 cooperate to achieve the initial positioning of the mounting plate 2.

[0035] To facilitate disassembly, an extrusion block 43 is provided in the slot 46, and a strip-shaped hole 45 is provided at the top of the pipe 3 to cooperate with the slot 46. A movable rod 44 is connected to the top of the extrusion block 43. The extrusion block 43 is movably installed in the slot 46 and abuts against the positioning block 42. The movable rod 44 is movably installed in the strip-shaped hole 45. When disassembly is required, the extrusion block 43 can be moved by sliding the movable rod 44. When the extrusion block 43 moves, it squeezes the positioning block 42, causing the positioning block 42 to return to the positioning slot 4 and no longer cooperate with the slot 46. In this way, the mounting plate 2 and the pipe 3 can be separated.

[0036] The base plate 1 has transverse holes 5 at both ends, and the length of the transverse holes 5 is the same as that of the base plate 1. The second positioning member includes a positioning rod 51 slidably mounted in the transverse hole 5. The inner wall of the mounting groove 31 is provided with a retaining hole 34 that engages with the end of the positioning rod 51. The base plate 1 is provided with a driving member for driving the positioning rod 51. The driving member moves the positioning rod 51, and the positioning rod 51 enters the retaining hole 34, thereby achieving connection between the base plate 1 and the pipe 3.

[0037] Regarding the structure of the driving member, a control groove 12 is provided in the base plate 1. The driving member includes a driving rod 19 disposed in the control groove 12. A connecting block 18 is fixedly provided in the control groove 12. The driving rod 19 is rotatably mounted on the connecting block 18. One end of the driving rod 19 is located in the control groove 12, and the other end is located in the transverse hole 5. A driving block 52 is movably mounted in the transverse hole 5. The driving block 52 is provided with a threaded hole 55. The driving rod 19 is provided with an external thread that threadably engages with the threaded hole 55. When the driving rod 19 rotates, the driving block 52 is driven to move in the transverse hole 5. A first piston 53 is connected to the end of the driving block 52 near the positioning rod 51. A second piston 54 is provided at the end of the positioning rod 51. The first piston 53 and the second piston 54 are movably mounted in the transverse hole 5 and abut against the inner wall of the transverse hole 5. The structure of the driving member is set to a driving rod 19, which is rotatably installed inside the base plate 1, and the driving rod 19 and the driving block 52 are threaded together. When the driving rod 19 rotates, it can drive the driving block 52 to move horizontally. The driving block 52 drives the first piston 53 to move. The first piston 53 increases the internal air pressure of the transverse hole 5, so that the second piston 54 moves. The second piston 54 drives the positioning rod 51 to move and cooperate with the card hole 34.

[0038] The drive member also includes a turntable 13 disposed in the control slot 12. The turntable 13 is rotatably mounted at the bottom of the control slot 12. A first bevel gear 15 is disposed on the top of the turntable 13, and a second bevel gear 17 is disposed at the end of the drive rod 19. The first bevel gear 15 and the second bevel gear 17 are meshed. The turntable 13 is rotatably connected to the base plate 1 via a rotating shaft 14. The rotating shaft 14 extends downward to the exterior of the base plate 1. A rotating handle 16 is detachably mounted on one end of the rotating shaft 14. For example, the rotating handle 16 is mounted on the rotating shaft 14. Rotating the rotating handle 16 can drive the rotating shaft 14 to rotate, thereby driving the turntable 13 to rotate. When the turntable 13 rotates, the first bevel gear 15 rotates, and the first bevel gear 15 drives the second bevel gear 17 to rotate, thereby achieving rotation of the drive rod 19.

[0039] For example, an annular groove 25 is provided on the mounting plate 2, in which an airbag strip 26 is disposed. A vent hole 27 is provided within the mounting plate 2. One end of the vent hole 27 communicates with the transverse hole 5, and the other end extends into the annular groove 25 and communicates with the airbag strip 26. The airbag strip 26 is annular and sleeved within the annular groove 25. The connection between the vent hole 27 and the transverse hole 5 is located between the first piston 53 and the second piston 54, and the airbag strip 26 abuts against the inner wall of the limiting groove 32. The addition of the vent hole 27 and the airbag strip 26 increases the air pressure in the transverse hole 5 when the first piston 53 moves, and a portion of the air in the transverse hole 5 enters the airbag strip 26 through the vent hole 27, causing the airbag strip 26 to expand and abut against the inner wall of the limiting groove 32, thereby making the connection between the mounting plate 2 and the limiting groove 32 more stable and airtight. Rotating the turntable 13 not only allows the positioning rod 51 to engage with the locking hole 34, but also allows the airbag strip 26 to expand, making it more convenient to use. Similarly, when the turntable 13 rotates in the opposite direction, the airbag will be deflated, facilitating the removal of the mounting plate 2. The positioning rod 51 will also move in the opposite direction, no longer engaging with the locking hole 34, facilitating the removal of the base plate 1.

[0040] The operating principle of this embodiment is: when installing, the top of the mounting plate 2 is sent into the limiting groove 32, and the first positioning member on the mounting plate 2, that is, the positioning block 42, cooperates with the card slot 46 in the limiting groove 32 to achieve preliminary positioning of the mounting plate 2.

[0041] When the first and second bevel gears 15 and 17 are rotated, the first and second bevel gears 17 are rotated, thereby driving the driving rod 19 to rotate. When the driving rod 19 rotates, the driving block 52 moves horizontally in the transverse hole 5, driving the first piston 53 to move, squeezing the air in the transverse hole 5, and at the same time, sending the air into the vent hole 27 so that the airbag strip 26 collides with it. Finally, the positioning rod 51 moves and cooperates with the card hole 34 on the mounting groove 31, thereby achieving the installation and fixation of the bottom plate 1, and the airbag strip 26 collides with the inner wall of the limit groove 32, thereby achieving further installation of the mounting plate 2. The installation of the mounting plate 2 and the bottom plate 1 is achieved through the above process, and the installation of the valve body 23 is completed. During the installation process, it is only necessary to perform the preliminary fixation of the mounting plate 2 by the first positioning member, and then the rotation of the turntable 13 can realize the connection between the overall structure and the pipeline 3, and the installation and use process is relatively convenient.

[0042] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A pneumatic fireproof airtight butterfly valve, comprising a mounting plate (2), a base plate (1) and a butterfly valve body, characterized in that: The butterfly valve body comprises a valve body (23) and an actuator (24), the actuator (24) being used to control the opening and closing of the valve body (23), the valve body (23) and the actuator (24) being mounted on the mounting plate (2), and the mounting plate (2) being mounted on the base plate (1); a through hole (21) for mounting the valve body (23) is provided on the mounting plate (2), the valve body (23) is tightly abutted against the inner wall of the through hole (21), and a receiving groove (22) for mounting the actuator (24) is provided in the mounting plate (2); The mounting plate (2) is mounted in the pipe (3); a mounting groove (31) for mounting the base plate (1) is provided at the bottom of the pipe (3); the base plate (1) abuts against the inner wall of the mounting groove (31); both sides of the mounting plate (2) abut against the inner wall of the pipe (3); a limiting groove (32) is provided on the inner wall of the top of the pipe (3) to cooperate with the top of the mounting plate (2); a first positioning member is provided at the top of the mounting plate (2), and the first positioning member is used to connect the mounting plate (2) and the pipe (3); a positioning groove (4) is provided in the mounting plate (2), and the first positioning member includes a positioning block (42) provided in the positioning groove (4), and the positioning block (42) is slidably mounted in the positioning groove (4); a return spring (41) is provided in the positioning groove (4), and the return spring The two ends of (41) are respectively connected to the inner wall of the end of the positioning block (42) and the positioning groove (4); the limiting groove (32) is provided with a clamping groove (46) that cooperates with the end of the positioning block (42); the end of the positioning block (42) is provided with an inclined slope, and the inclined direction of the slope is inclined from top to bottom in a direction away from the reset spring (41); a second positioning member is provided in the base plate (1), and the second positioning member is used to connect the base plate (1) and the pipe (3); transverse holes (5) are provided at both ends of the base plate (1), and the second positioning member includes a positioning rod (51) slidably installed in the transverse hole (5); a clamping hole (34) that cooperates with the end of the positioning rod (51) is provided on the inner wall of the mounting groove (31), and a driving member for driving the positioning rod (51) is provided in the base plate (1).

2. The pneumatic fireproof airtight butterfly valve according to claim 1, characterized in that: A control groove (12) is provided in the base plate (1), and the driving member includes a driving rod (19) provided in the control groove (12). A connecting block (18) is fixedly provided in the control groove (12), and the driving rod (19) is rotatably mounted on the connecting block (18). One end of the driving rod (19) is located in the control groove (12), and the other end is located in the transverse hole (5). A driving block (52) is movably installed in the transverse hole (5), and a threaded hole (55) is provided on the driving block (52). The driving rod (19) is provided with an external thread and is threadably engaged with the threaded hole (55). When the driving rod (19) rotates, the driving block (52) is driven to move in the transverse hole (5); a first piston (53) is provided at one end of the driving block (52) close to the positioning rod (51), and a second piston (54) is provided at the end of the positioning rod (51). The first piston (53) and the second piston (54) are movably installed in the transverse hole (5) and abut against the inner wall of the transverse hole (5).

3. The pneumatic fireproof airtight butterfly valve according to claim 2, characterized in that: The driving member further comprises a turntable (13) arranged in the control groove (12), the turntable (13) being rotatably mounted at the bottom of the control groove (12), a first bevel gear (15) being arranged on the top of the turntable (13), a second bevel gear (17) being arranged at the end of the driving rod (19), the first bevel gear (15) and the second bevel gear (17) being meshed; the turntable (13) is rotatably connected to the base plate (1) via a rotating shaft (14), the rotating shaft (14) extending downward to the outside of the base plate (1), and a rotating handle (16) being detachably mounted on one end of the rotating shaft (14).

4. The pneumatic fireproof airtight butterfly valve according to claim 3, characterized in that: An annular groove (25) is provided on the mounting plate (2), an airbag strip (26) is provided in the annular groove (25), and an air vent (27) is provided in the mounting plate (2). One end of the air vent (27) is connected to the transverse hole (5), and the other end extends to the annular groove (25) and is connected to the airbag strip (26). The connection between the air vent (27) and the transverse hole (5) is located between the first piston (53) and the second piston (54), and the airbag strip (26) is against the inner wall of the limiting groove (32).

5. The pneumatic fireproof airtight butterfly valve according to claim 1, characterized in that: An extension plate (11) is provided at the bottom of the base plate (1), a groove matching the extension plate (11) is provided at the bottom of the pipe (3), a sealing gasket (33) is provided at the top of the extension plate (11), and the sealing gasket (33) abuts against the groove.

6. The pneumatic fireproof airtight butterfly valve according to claim 1, characterized in that: An extrusion block (43) is provided in the slot (46), a strip hole (45) cooperating with the slot (46) is provided on the top of the pipe (3), a movable rod (44) is connected to the top of the extrusion block (43), the extrusion block (43) is movably installed in the slot (46) and abuts against the positioning block (42), and the movable rod (44) is movably installed in the strip hole (45).

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