Integrated shut-off type pressure independent type constant air volume butterfly valve

Abstract

The utility model discloses an integrated turn-off type pressure independent type constant air volume butterfly valve, and relates to the technical field of laboratory ventilation, the integrated turn-off type pressure independent type constant air volume butterfly valve comprises a breather pipe, and the breather pipe is provided with a pressure independent type constant air volume butterfly valve body; the pressure-independent type constant air volume butterfly valve body comprises a mounting shell arranged on a breather pipe, an actuator is arranged on the mounting shell, fixing shells are arranged on the front side and the rear side of the inner wall of the breather pipe, the fixing shells on the two sides are connected with a rotating shaft, the rotating shaft is connected with the actuator, and the actuator drives the rotating shaft to rotate. The butterfly plate rotates by 90 degrees in the ventilation pipe, so that the two sides can be attached to the sealing rings on the baffles respectively, rapid sealing of the ventilation pipe can be achieved, the butterfly valve design is adopted, opening and closing are rapid, airflow can be rapidly isolated when needed, and harmful gas or microorganisms can be effectively prevented from diffusing when animal houses are killed.

Description

Technical Field

[0001] This utility model relates to the field of laboratory ventilation technology, specifically an integrated shut-off pressure-independent constant air volume butterfly valve. Background Technology

[0002] Authorized publication number CN219221285U discloses a fire ventilation duct valve, which includes a valve body and an adjusting mechanism. The adjusting mechanism is installed inside the valve body. The adjusting mechanism is set up so that the bidirectional threaded rod is driven to rotate by starting the motor to rotate forward and reverse. Under the limiting action of two threaded blocks respectively connected to the two ends of the bidirectional threaded rod, the first valve plate and the second valve plate are moved closer or further away, so as to adjust the gap between the first valve plate and the second valve plate, thereby facilitating the control of the valve opening size.

[0003] However, the applicant discovered that in this technical solution, the valve can only be moved by rotating the threaded rod driven by a motor, resulting in a slow valve closing speed. Consequently, in places with limited space such as animal rooms or laboratories where immediate shut-off is required, the use of this technical solution could easily lead to the spread of harmful gases or microorganisms. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an integrated, shut-off, pressure-independent constant air volume butterfly valve, which solves the problems existing in the prior art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an integrated shut-off pressure-independent constant air volume butterfly valve, including a vent pipe, on which the pressure-independent constant air volume butterfly valve body is provided;

[0006] The pressure-independent constant air volume butterfly valve body includes a mounting shell mounted on a vent pipe, an actuator mounted on the mounting shell, and fixed shells on both the front and rear sides of the inner wall of the vent pipe. Both fixed shells are connected to a rotating shaft, which is connected to the actuator. A butterfly plate is mounted on the rotating shaft, and the front and rear sides of the butterfly plate are in contact with the two fixed shells respectively. L-shaped baffles are provided on both the left and right sides of the inner wall of the vent pipe. Sealing rings are provided at the top of the left baffle and the bottom of the right baffle. Buffer mechanisms are provided on both baffles.

[0007] Preferably, the buffer mechanism includes a through groove formed on the baffle, a movable component is provided on the through groove, buffer components one are evenly arranged on the movable component, and the movable component is used to move buffer components one, and buffer components two are provided on buffer components one.

[0008] Preferably, the moving component includes electric guide rails one disposed at both ends of the through groove, the output ends of the front and rear electric guide rails one are both connected to electric guide rails two, and the buffer component one is evenly disposed on the output ends of the electric guide rails two.

[0009] Preferably, the first buffer assembly includes a mounting block connected to the output end of the second electric guide rail. A vertical rod extends through the mounting block, and a connecting plate is provided on the vertical rod. A buffer spring connected to the mounting block is provided on the connecting plate.

[0010] Preferably, the second buffer component includes a rubber sleeve, which is fitted onto the connecting block. The connecting block is provided with a screw, and the vertical rod has a screw hole for connecting to the screw.

[0011] Preferably, the outer ring of the connecting block is uniformly provided with convex rings, and the inside of the rubber sleeve is uniformly provided with grooves that fit with the convex rings.

[0012] Beneficial effects

[0013] This utility model provides an integrated, shut-off, pressure-independent constant air volume butterfly valve. Compared with the prior art, it has the following advantages:

[0014] 1. This integrated shut-off pressure-independent constant air volume butterfly valve uses an actuator to drive the shaft to rotate, causing the butterfly plate to rotate 90 degrees inside the vent pipe. This allows the sealing rings on both sides to be attached to the baffles, achieving rapid sealing of the vent pipe. The butterfly valve design allows for rapid opening and closing, and can quickly isolate airflow when needed, such as during disinfection in animal rooms, effectively preventing the spread of harmful gases or microorganisms. Therefore, this device is suitable for animal laboratories, biosafety laboratories, and other places with limited space that require precise airflow control and immediate shut-off functions.

[0015] 2. This integrated shut-off pressure-independent constant air volume butterfly valve, by setting buffer component one and buffer component two, can effectively buffer the butterfly plate when rotating and closing, avoiding excessive impact force between the butterfly plate and the baffle due to rapid closing, thereby improving the service life of the butterfly plate and the baffle; by moving the component, the position of buffer component one and buffer component two can be changed, thereby changing the contact position with the butterfly plate, thus avoiding friction at the fixed position during buffering, which would cause greater wear at the fixed position of the butterfly plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the baffle, sealing ring, moving component, buffer component one, and buffer component two of this utility model;

[0018] Figure 3This is a schematic diagram of buffer component one and buffer component two of this utility model;

[0019] Figure 4 This is a schematic diagram showing the disassembled buffer component two of this utility model.

[0020] In the diagram: 1. Vent pipe; 2. Mounting housing; 3. Actuator; 4. Rotating shaft; 5. Fixed housing; 6. Butterfly plate; 7. Baffle; 8. Sealing ring; 9. Through groove; 10. Electric guide rail one; 11. Electric guide rail two; 12. Mounting block; 13. Vertical rod; 14. Connecting plate; 15. Buffer spring; 16. Rubber sleeve; 17. Connecting block; 18. Screw; 19. Screw hole; 20. Raised ring; 21. Groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] See Figures 1-4 This utility model provides the following three technical solutions:

[0023] First implementation: An integrated shut-off pressure-independent constant air volume butterfly valve, including a vent pipe 1, on which the pressure-independent constant air volume butterfly valve body is installed.

[0024] The pressure-independent constant air volume butterfly valve body includes a mounting shell 2 installed on the vent pipe 1, an actuator 3 installed on the mounting shell 2, and a fixed shell 5 installed on both the front and rear sides of the inner wall of the vent pipe 1 in order to install the rotating shaft 4. Both fixed shells 5 are connected to the rotating shaft 4 through bearings, and the rotating shaft 4 is connected to the actuator 3. The actuator 3 can drive the rotating shaft 4 to rotate. A butterfly plate 6 is installed on the rotating shaft 4. The front and rear sides of the butterfly plate 6 contact the fixed shells 5 on both sides respectively, so that it can contact the fixed shells 5 when closed. L-shaped baffles 7 are installed on both the left and right sides of the inner wall of the vent pipe 1. The above structure is integrated on the vent pipe 1. This integrated design has a better performance.

[0025] To ensure sealing, sealing rings 8 are provided at the top of the left baffle 7 and the bottom of the right baffle 7. The actuator 3 drives the rotating shaft 4 to rotate, which in turn drives the butterfly plate 6 to rotate. The butterfly plate 6 rotates 90 degrees counterclockwise inside the vent pipe 1, so that the sealing rings 8 on both sides can be respectively attached to the two side baffles 7 to achieve rapid sealing of the vent pipe 1. By changing the opening of the butterfly plate 6, the airflow can be controlled. When the butterfly plate 6 is fully open, the area of ​​airflow through the vent pipe 1 is the largest, reaching the maximum flow rate. When the butterfly plate 6 is in the middle position, the airflow reaches a constant value, which is called constant air volume. Other structures in the body of the pressure-independent constant air volume butterfly valve that are not mentioned are the same as those in the prior art.

[0026] The applicant discovered that even with the rubber sealing ring 8 installed, the butterfly plate 6 still experiences a significant impact force with the baffle 7 when it rotates and closes rapidly. To protect the butterfly plate 6 and the baffle 7, buffer mechanisms are installed on both sides of the baffle 7.

[0027] The buffer mechanism includes a through groove 9 opened on the baffle 7, a moving component is provided on the through groove 9, buffer component one is evenly arranged on the moving component, and the moving component is used to move buffer component one, and buffer component two is provided on buffer component one.

[0028] The moving component includes electric guide rails 10 at both ends of the through groove 9. The output ends of the electric guide rails 10 are connected to electric guide rails 11. Buffer components are evenly distributed on the output ends of electric guide rails 11. Both electric guide rails 10 and electric guide rails 11 are powered and controlled using existing technology.

[0029] The first buffer assembly includes a mounting block 12 connected to the output end of the second electric guide rail 11. A motor-driven lead screw can be installed on the second electric guide rail 11. All the mounting blocks 12 are screwed onto the lead screw. When the lead screw rotates, the second electric guide rail 11 can drive multiple mounting blocks 12 to move synchronously. A vertical rod 13 runs through the mounting block 12. A connecting plate 14 is installed on the vertical rod 13, and a buffer spring 15 connected to the mounting block 12 is installed on the connecting plate 14.

[0030] The second embodiment differs from the first embodiment in that the second buffer assembly includes a rubber sleeve 16, which is fitted onto the connecting block 17 so that the rubber sleeve 16 contacts the butterfly plate 6 first, thereby reducing the impact force between the butterfly plate 6 and the vertical rod 13. The connecting block 17 is provided with a screw 18, and the vertical rod 13 is provided with a screw hole 19 connected to the screw 18 for installing the connecting block 17.

[0031] The third embodiment differs from the second embodiment in that: the outer ring of the connecting block 17 is uniformly provided with convex rings 20, and the inside of the rubber sleeve 16 is uniformly provided with grooves 21 that fit with the convex rings 20. The cross-sections of the convex rings 20 and the grooves 21 are both semi-circular, which can hold the rubber sleeve 16 in place and prevent it from detaching from the connecting block 17.

[0032] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used.

[0033] In use, the actuator 3 drives the rotating shaft 4 to rotate, allowing the butterfly plate 6 to rotate 90 degrees and quickly fit with the sealing rings 8 on both sides to seal the vent pipe 1, thus shutting off the vent pipe 1. When the butterfly plate 6 rotates and closes near the baffle 7, the butterfly plate 6 first contacts the rubber sleeves 16 on both sides, which can provide initial buffering. Then, the impact force causes the vertical rod 13 to move on the mounting block 12, which in turn drives the connecting plate 14 to move and stretches the buffer spring 15, providing secondary buffering. When it contacts the sealing ring 8, it can avoid excessive impact force between the butterfly plate 6 and the baffle 7 due to rapid closing. After a period of time, the electric guide rail 10 can drive the electric guide rail 2 11 to move laterally. The electric guide rail 2 11 drives all the mounting blocks 12 to move back and forth synchronously, so that the position of the rubber sleeves 16 can change accordingly. This avoids constant friction against the fixed position of the butterfly plate 6 during buffering, which would cause greater wear at the fixed position of the butterfly plate 6.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated shutoff type pressure independent constant air volume butterfly valve, characterized in that: The utility model provides a pressure independent constant air volume butterfly valve body is arranged on the ventilation pipe (1), and the ventilation pipe (1) is arranged with the pressure independent constant air volume butterfly valve body. The pressure independent constant air volume butterfly valve body includes a mounting shell (2) arranged on the ventilation pipe (1), an actuator (3) arranged on the mounting shell (2), a fixed shell (5) arranged on the front and back of the inner wall of the ventilation pipe (1), a rotating shaft (4) connected with the fixed shell (5) on both sides, the rotating shaft (4) connected with the actuator (3), a butterfly plate (6) arranged on the rotating shaft (4), the butterfly plate (6) in contact with the fixed shell (5) on both sides, an L-shaped baffle (7) arranged on the left and right sides of the inner wall of the ventilation pipe (1), a sealing ring (8) arranged on the top of the left baffle (7) and the bottom of the right baffle (7), and a buffer mechanism arranged on the baffle (7) on both sides.

2. The integrated shutoff type pressure independent DVC butterfly valve according to claim 1, characterized in that: The buffer mechanism includes a through groove (9) opened on the baffle (7), a moving assembly arranged on the through groove (9), a buffer assembly one arranged on the moving assembly, and the moving assembly used for moving the buffer assembly one, and a buffer assembly two arranged on the buffer assembly one.

3. The integrated shutoff type pressure independent DVC butterfly valve according to claim 2, characterized in that: The moving assembly includes an electric guide rail one (10) arranged on the front and back of the through groove (9), and the output end of the electric guide rail one (10) connected with an electric guide rail two (11).

4. The integrated shutoff type pressure independent DVC butterfly valve according to claim 3, characterized in that: The buffer assembly one includes a mounting block (12) connected with the output end of the electric guide rail two (11), a vertical rod (13) vertically penetrating through the mounting block (12), a connecting plate (14) arranged on the vertical rod (13), and a buffer spring (15) arranged on the connecting plate (14) and connected with the mounting block (12).

5. The integrated shutoff type pressure independent DVC butterfly valve according to claim 4, characterized in that: The buffer assembly two includes a rubber sleeve (16), the rubber sleeve (16) sleeved on a connecting block (17), a screw rod (18) arranged on the connecting block (17), and a screw hole (19) opened on the vertical rod (13) and connected with the screw rod (18).

6. The integrated shutoff type pressure independent DVC butterfly valve according to claim 5, characterized in that: The outer ring of the connecting block (17) is uniformly provided with a convex ring (20), and the inside of the rubber sleeve (16) is uniformly provided with a groove (21) matched with the convex ring (20).

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