Ventilation valve

Abstract

The utility model discloses a ventilation valve, belongs to the field of ventilation valves, solves the problem that air in a ventilation channel cannot be completely exhausted through ventilation of a traditional ventilation valve, and mainly adopts the technical scheme that the ventilation valve comprises a shell, and the ventilation channel is arranged in the shell; a first ventilation opening and a second ventilation opening are formed in the two opposite ends of the ventilation channel, a valve plate used for closing the first ventilation opening and a driving assembly used for driving the valve plate to be opened and closed are arranged in the ventilation channel, the driving assembly comprises a rotating driver, a first rotating rod and a second rotating rod, and a fixing block is arranged on the inner wall of the ventilation channel; a rotating shaft of the rotating driver is installed on the fixing block, one end of the first rotating rod is fixedly connected with the rotating shaft of the rotating driver, the other end of the first rotating rod is hinged to the valve plate, one end of the second rotating rod is hinged to the fixing block, and the other end of the second rotating rod is hinged to the valve plate. The utility model mainly prevents the polluted air from flowing back to the laboratory.

Description

Technical Field

[0001] The utility model relates to the field of ventilation valves, in particular to a ventilation valve. Background Art

[0002] In a laboratory environment, ventilation is crucial to remove harmful gases, odors and pollutants to ensure the safety and comfort of the laboratory. Ventilation work usually requires the use of ventilation valves to control the air flow.

[0003] One side of the traditional ventilation valve is always in contact with the vent and will compress the sealing ring at the vent. In the long run, the sealing performance of the sealing ring will be reduced. In addition, a semi-closed space will be formed between the traditional ventilation valve and one side of the ventilation channel, so that when the air circulates in the ventilation channel, whether it is exhausting gas from the inside to the outside or transporting fresh air from the outside to the inside, there will be a part of the air in the ventilation channel. In most cases, the air that needs to be ventilated in the laboratory is contaminated. If it cannot be completely discharged, there will be a risk of backflow. Utility Model Content

[0004] The utility model aims to provide a ventilation valve to solve the problem that the traditional ventilation valve cannot completely discharge the air in the ventilation channel, so that the air in the ventilation channel can be completely discharged.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a ventilation valve, comprising a shell, a ventilation channel is provided in the shell, a first ventilation port and a second ventilation port are provided at opposite ends of the ventilation channel, a valve plate for closing the first ventilation port and a driving component for driving the valve plate to open and close are provided in the ventilation channel, the driving component comprises a rotation driver, a first rotating rod and a second rotating rod, a fixed block is provided on the inner wall of the ventilation channel, the rotating shaft of the rotation driver is installed on the fixed block, the A1 end of the first rotating rod is fixedly connected to the rotating shaft of the rotation driver, the B1 end of the first rotating rod is hinged to the valve plate, the A2 end of the second rotating rod is hinged to the fixed block, the B2 end of the second rotating rod is hinged to the valve plate, and the hinge axes of the A1 end and the B1 end of the first rotating rod and the A2 end and the B2 end of the second rotating rod are connected to form a quadrilateral in the order of A1 B1 B2 A2.

[0006] After adopting the above technical scheme, the utility model has the following advantages: compared with the traditional valve, the traditional valve has one side connected to the valve port, resulting in one side of the ventilation channel and the valve plate forming a semi-enclosed space, which is not conducive to the flow of gas in this space, and the rotary drive drives the first rotating rod to rotate, so that the valve plate connected to the first rotating rod and the second rotating rod rotates and completely disengages from the first ventilation port, thereby eliminating this semi-enclosed space, allowing the air in the space around the valve plate to be completely discharged, preventing the contaminated air from flowing back into the laboratory.

[0007] Furthermore, an outer edge plate is provided on the outer edge of the first vent, the size of the valve plate is larger than the size of the first vent, and when the valve plate closes the first vent, the valve plate abuts against the outer edge plate, and a sealing ring is provided between the valve plate and the outer edge plate.

[0008] By adopting the above-mentioned technical solution, the first ventilation opening can be sealed through the cooperation of the sealing ring, the outer edge plate and the valve plate.

[0009] Furthermore, when the valve plate is in a fully open state, the valve plate is separated from the outer edge plate.

[0010] By adopting the above-mentioned technical solution, the valve plate is completely separated from the outer edge plate by the first rotating rod and the second rotating rod, and at the same time it is also completely separated from the sealing ring, thereby protecting the sealing ring from being further squeezed during the opening process of the valve plate, thereby increasing the life of the sealing ring. The traditional valve opening method causes one side of the sealing ring to be further squeezed after the valve plate is opened, thereby reducing the life of this side of the sealing ring and deteriorating the sealing performance.

[0011] Furthermore, the angle of ∠A2B2B1 is always greater than 90°, and the angle of ∠B2B1 A1 is always less than 90°.

[0012] With the above technical solution, when ∠A2B2B1 is greater than 90° and ∠B2B1 A1 is less than 90° when the valve plate is closed, the tangential force of the valve plate opening and closing on the first vent is minimal, and the valve plate can be opened more quickly, so that the first vent is opened quickly.

[0013] Furthermore, the second rotating rod is a curved rod extending in a circular arc, and the circular arc concave portion of the second rotating rod is adapted to the hinge portion between the first rotating rod and the fixed block.

[0014] By adopting the above-mentioned technical solution, when the valve plate is opened, the recessed part of the second rotating rod avoids the hinge between the first rotating rod and the fixed block, so that the rotation amplitude of the second rotating rod is larger, the opening angle of the valve plate is larger, and a greater ventilation efficiency can be obtained.

[0015] Furthermore, the length of the first rotating rod is greater than the length of the second rotating rod.

[0016] By adopting the above technical solution, the rotating shaft of the rotary driver has a longer torque, so that the force on the rotating shaft can be reduced, thereby increasing the life of the rotating shaft.

[0017] Furthermore, the number of the first rotating rod, the second rotating rod and the fixed block are all two, and a first rotating rod, a second rotating rod and a fixed block constitute a moving component, and the two driving components are arranged on opposite sides of the valve plate.

[0018] By adopting the above technical solution and arranging driving components on both sides of the valve plate, the valve plate will not vibrate during operation and will be more stable.

[0019] Furthermore, the rotation driver is arranged outside the shell.

[0020] By adopting the above technical solution, the rotary driver will not be affected by the gas in the ventilation channel, and the operation is relatively more stable.

[0021] Furthermore, a reinforcement strip is fixed to the back side of the valve plate, and the first rotating rod and the second rotating rod are connected to the reinforcement strip.

[0022] By adopting the aforementioned technical solution, the first rotating rod and the second rotating rod are connected by the reinforcement strip of the valve plate, so that the overall strength of the valve plate is higher, thereby ensuring better sealing of the first vent, and the first rotating rod and the second rotating rod are installed on the reinforcement strip without changing the structure of the valve plate, thereby further improving the sealing of the valve plate to the first vent.

[0023] Further, the first vent is an air inlet; or, the second vent is an air inlet.

[0024] By adopting the above-mentioned technical solution, a semi-enclosed space will be formed between the opened valve plate and one side of the ventilation channel. When the first vent is the air inlet, the gas flow efficiency in the semi-enclosed space can be improved; when the second vent is the air inlet, the vortex wind formed by the gas entering the semi-enclosed space can be reduced, thereby improving the air circulation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of a ventilation valve of the utility model;

[0027] Figure 2 It is a schematic diagram of the ventilation duct;

[0028] Figure 3 This is the left side cross-sectional view of the ventilation valve and its wind direction after the valve is opened.

[0029] Description of the drawings: 1. Shell; 2. Ventilation channel; 21. First vent; 22. Second vent; 3. Valve plate; 4. Drive assembly; 41. Rotation driver; 411. Rotating shaft; 42. First rotating rod; 43. Second rotating rod; 5. Fixed block; 6. Outer edge plate; 7. Sealing ring; 8. Reinforcement strip. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0031] The terms "first", "second", etc. (if any) in the specification and claims of the present utility model are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish a certain technical feature, it does not necessarily mean that it has "first". It should be understood that in the present utility model, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present utility model, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0032] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0033] like Figure 1As shown, the utility model provides a ventilation valve, including a shell 1, a ventilation channel 2 is provided in the shell 1, a first ventilation port 21 and a second ventilation port 22 are provided at opposite ends of the ventilation channel 2, a valve plate 3 for closing the first ventilation port 21 and a driving assembly 4 for driving the valve plate 3 to open and close are provided in the ventilation channel 2, the driving assembly 4 includes a rotation driver 41, a first rotation rod 42 and a second rotation rod 43, a fixed block 5 is provided on the inner wall of the ventilation channel 2, a rotating shaft 411 of the rotation driver 41 is installed on the fixed block 5, an A1 end of the first rotation rod 42 is fixedly connected to the rotating shaft 411 of the rotation driver 41, a B1 end of the first rotation rod 42 is hinged to the valve plate 3, an A2 end of the second rotation rod 43 is hinged to the fixed block 5, a B2 end of the second rotation rod 43 is hinged to the valve plate 3, and the hinge axes of the A1 end and the B1 end of the first rotation rod 42 and the A2 end and the B2 end of the second rotation rod 43 are hinged according to A1 B1B2 The order of A2 is connected in sequence to form a quadrilateral.

[0034] After adopting the above technical scheme, the utility model has the following advantages: compared with the traditional valve, the traditional valve has one side connected to the valve port, resulting in one side of the ventilation channel 2 and the valve plate 3 forming a semi-enclosed space, which is not conducive to the gas flow in this space, and the rotary drive 41 drives the first rotating rod 42 to rotate, so that the valve plate 3 connected to the first rotating rod 42 and the second rotating rod 43 rotates and completely disengages from the first ventilation port 21, thereby eliminating this semi-enclosed space, so that the air in the space around the valve plate 3 can be completely discharged, preventing the contaminated air from flowing back to the laboratory.

[0035] Specifically, the fixing block 5 is fixed to the inner wall of the ventilation passage 2 by bolts; the rotation driver 41 is a motor; the first rotating rod 42 and the second rotating rod 43 are connected to the same surface of the fixing block 5 .

[0036] Furthermore, an outer edge plate 6 is provided on the outer edge of the first vent 21, and the size of the valve plate 3 is larger than that of the first vent 21. When the valve plate 3 closes the first vent 21, the valve plate 3 abuts against the outer edge plate 6, and a sealing ring 7 is provided between the valve plate 3 and the outer edge plate 6.

[0037] By adopting the above technical solution, the first vent 21 can be sealed by the cooperation of the sealing ring 7, the outer edge plate 6 and the valve plate 3. In one embodiment, the sealing ring 7 is arranged on the outer periphery of the first vent 21.

[0038] Furthermore, when the valve plate 3 is in a fully open state, the valve plate 3 is separated from the outer edge plate 6 .

[0039] By adopting the above-mentioned technical solution, the valve plate 3 is completely separated from the outer edge plate 6 by the first rotating rod 42 and the second rotating rod 43, and at the same time it is also completely separated from the sealing ring 7, thereby protecting the sealing ring 7 from being further squeezed during the opening process of the valve plate 3, thereby increasing the life of the sealing ring 7. The traditional valve opening method causes one side of the sealing ring 7 to be further squeezed after the valve plate 3 is opened, which reduces the life of this side of the sealing ring 7 and deteriorates the sealing performance.

[0040] Furthermore, the angle of ∠A2B2B1 is always greater than 90°, and the angle of ∠B2B1 A1 is always less than 90°.

[0041] With the above technical solution, when ∠A2B2B1 is greater than 90° and ∠B2B1 A1 is less than 90° when the valve plate is closed, the tangential force of the valve plate opening and closing on the first vent is minimal, and the valve plate can be opened more quickly, so that the first vent is opened quickly.

[0042] Furthermore, the second rotating rod 43 is a curved rod extending in an arc shape, and the arc concave portion of the second rotating rod 43 faces the hinge portion between the first rotating rod 42 and the fixing block 5 .

[0043] By adopting the above-mentioned technical solution, when the valve plate 3 is opened, the recessed part of the second rotating rod 43 avoids the hinge between the first rotating rod 42 and the fixed block 5, so that the rotation amplitude of the second rotating rod 43 is larger, the opening angle of the valve plate 3 is larger, and a greater ventilation efficiency can be obtained.

[0044] Furthermore, the length of the first rotating rod 42 is greater than the length of the second rotating rod 43 .

[0045] By adopting the above technical solution, the rotating shaft 411 of the rotating driver 41 has a longer torque, so that the force on the rotating shaft 411 can be reduced, thereby increasing the life of the rotating shaft 411.

[0046] Furthermore, the number of the first rotating rod 42 , the second rotating rod 43 and the fixed block 5 are all two, and one first rotating rod 42 , one second rotating rod 43 and one fixed block 5 constitute a moving component, and the two driving components are arranged on opposite sides of the valve plate 3 .

[0047] By adopting the above technical solution and arranging driving components on both sides of the valve plate 3, the valve plate 3 will not vibrate during operation and will be more stable.

[0048] Furthermore, the rotation driver 41 is arranged outside the housing 1 .

[0049] By adopting the above technical solution, the rotary driver 41 will not be affected by the gas in the ventilation channel 2, and the operation is relatively more stable.

[0050] Furthermore, a reinforcing bar 8 is fixed to the back side of the valve plate 3 , and the first rotating rod 42 and the second rotating rod 43 are connected to the reinforcing bar 8 .

[0051] By adopting the aforementioned technical solution, the first rotating rod 42 and the second rotating rod 43 are connected to the reinforcing strip 8 of the valve plate 3, so that the overall strength of the valve plate 3 is higher, thereby ensuring better sealing of the first vent 21, and the first rotating rod 42 and the second rotating rod 43 are installed on the reinforcing strip 8 without changing the structure of the valve plate 3, thereby further improving the sealing of the valve plate 3 to the first vent 21.

[0052] Further, the first vent 21 is an air inlet; or, the second vent 22 is an air inlet.

[0053] By adopting the above-mentioned technical solution, a semi-enclosed space will be formed between the opened valve plate 3 and one side of the ventilation channel 2. When the first ventilation port 21 is the air inlet, the gas flow efficiency in the semi-enclosed space can be improved; when the second ventilation port 22 is the air inlet, the vortex wind formed by the gas entering the semi-enclosed space can be reduced, thereby improving the air circulation efficiency.

[0054] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A ventilation valve, comprising a housing, a ventilation channel provided in the housing, a first ventilation opening and a second ventilation opening provided at opposite ends of the ventilation channel, a valve plate for closing the first ventilation opening and a driving assembly for driving the valve plate to open and close provided in the ventilation channel, characterized in that: The driving assembly includes a rotation driver, a first rotation rod and a second rotation rod. A fixed block is provided on the inner wall of the ventilation channel. The rotating shaft of the rotation driver is installed on the fixed block. The A1 end of the first rotation rod is fixedly connected to the rotating shaft of the rotation driver. The B1 end of the first rotation rod is hinged to the valve plate. The A2 end of the second rotation rod is hinged to the fixed block. The B2 end of the second rotation rod is hinged to the valve plate. The hinge axes of the A1 end and the B1 end of the first rotation rod and the A2 end and the B2 end of the second rotation rod are connected to form a quadrilateral in the order of A1 B1 B2 A2.

2. A ventilation valve according to claim 1, characterized in that: An outer edge plate is provided at the outer edge of the first vent, the size of the valve plate is larger than that of the first vent, and when the valve plate closes the first vent, the valve plate abuts against the outer edge plate, and a sealing ring is provided between the valve plate and the outer edge plate.

3. A ventilation valve according to claim 2, characterized in that: When the valve plate is in a fully opened state, the valve plate is separated from the outer edge plate.

4. A ventilation valve according to claim 1, characterized in that: The angle of ∠A2B2B1 is always greater than 90°, and the angle of ∠B2B1 A1 is always less than 90°.

5. A ventilation valve according to claim 1, characterized in that: The second rotating rod is a curved rod extending in a circular arc, and the circular arc concave portion of the second rotating rod faces the hinged portion between the first rotating rod and the fixed block.

6. A ventilation valve according to claim 1, characterized in that: The length of the first rotating rod is greater than the length of the second rotating rod.

7. A ventilation valve according to claim 1, characterized in that: The number of the first rotating rod, the second rotating rod and the fixed block are all two, and one first rotating rod, one second rotating rod and one fixed block constitute a driving component, and the two driving components are arranged on opposite sides of the valve plate.

8. A ventilation valve according to claim 1, characterized in that: The rotary driver is arranged outside the shell.

9. A ventilation valve according to claim 1, characterized in that: A reinforcement bar is fixed to the back side of the valve plate, and the first rotating rod and the second rotating rod are connected to the reinforcement bar.

10. A ventilation valve according to claim 1, 2 or 3, characterized in that: The first vent is an air inlet; or the second vent is an air inlet.

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