Ventilation valve

Abstract

The utility model discloses a ventilation valve, which belongs to the field of ventilation valves, solves the problem that air in a ventilation channel cannot be completely exhausted by the traditional ventilation valve, and is characterized in that a driving component comprises a rotating driver, a rotating rod and a hinge rod mechanism, one of the A end of the first hinge rod and the A end of the second hinge rod is in sliding connection with the valve plate, the other one is hinged to the valve plate, the B end of the first hinge rod is in sliding connection with the vicinity of the A end of the first rotating rod, the B end of the second hinge rod is hinged to the B end of the first rotating rod, and the position, close to the B end, of the second hinge rod is hinged to the B end of the first rotating rod. The end A of the second rotating rod is hinged to the inner wall of the ventilation channel, and the hinge axis of the end A of the second rotating rod, the hinge axis of the end B and the axis of the rotating shaft are triangularly arranged. According to the utility model, the air in the space around the valve plate can be completely exhausted, so that the polluted air is prevented from flowing back to a 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 dampers to control the air flow and direction.

[0003] The valves in the prior art only open and close the valve plate by rotation, and the valve plate will generate a large tangential force on the valve port, further squeezing the valve port during the opening and closing process, causing the valve port and the sealing ring arranged at the valve port to increase the degree of wear. Another traditional ventilation valve has one side that is always in contact with the vent and will compress the sealing ring at the vent, which will reduce the sealing performance of the sealing ring over time. In addition, a semi-enclosed space will be formed on one side of the traditional ventilation valve and 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 arranged in the shell, a first ventilation port and a second ventilation port are arranged at opposite ends of the ventilation channel, a valve plate for closing the first ventilation port and a driving assembly for driving the valve plate to open and close are arranged in the ventilation channel, characterized in that the driving assembly comprises a rotation driver, a first hinged rod, a second hinged rod, a first rotating rod and a second rotating rod, the rotation driver drives the first rotating rod to rotate, the first hinged rod and the second hinged rod are cross-arranged and the middle part is hinged, one of the A end of the first hinged rod and the A end of the second hinged rod is slidably connected to the valve plate, and the other is hinged to the valve plate, the B end of the first hinged rod is slidably connected to the vicinity of the A end of the first rotating rod, the B end of the second hinged rod is hinged to the B end of the first rotating rod, the A end of the second rotating rod is hinged to the inner wall of the ventilation channel, and the hinge axis of the A end of the second rotating rod and the hinge axis of the B end are arranged in a triangle with the axis of the rotating shaft.

[0006] After adopting the above technical scheme, when the valve plate is opened, the rotating driver drives the first rotating rod to rotate, so that the first rotating rod squeezes the B end of the second rotating rod, so that the B end of the second rotating rod moves away from the A end of the first rotating rod, so that the A end of the first hinged rod and the A end of the second hinged rod move away from each other, the A end of the first hinged rod and the second hinged rod B end are retracted, and the valve plate is driven to move in the direction away from the first vent, so that the valve plate has an additional translation amplitude compared with the prior art, and the pressure on the valve port when the valve plate is opened is reduced. While the rotating driver drives the first rotating rod to rotate, the first rotating rod drives the first hinged rod, the second hinged rod and the valve plate to rotate, so that the valve plate and the first rotating rod rotate at the same time. It can be seen that due to the cooperation of the first hinged rod, the second hinged rod, the first rotating rod and the second rotating rod, the valve plate will increase a translation amplitude away from the first vent. At the same time, due to the cooperation of the first hinged rod and the second hinged rod, the valve plate and the first rotating rod When the valve plate is completely separated from the first vent, the valve plate and the first vent will form a certain angle to prevent the valve plate from blocking the inlet and outlet air, so that the inlet and outlet air can obtain a larger flow rate. Compared with using two sets of power mechanisms to complete two actions, the utility model adopts one power system to complete two actions at the same time, so that the control cost is reduced and the cost of operating and debugging the power system is reduced. When the valve plate is closed, due to the cooperation of the first hinged rod, the second hinged rod, the first rotating rod and the second rotating rod, the valve plate presses the first vent through a translational action when closed, which increases the sealing of the first vent compared with the prior art. Compared with the traditional valve, the valve of the present application can be completely separated from the first vent, thereby eliminating the semi-enclosed space, so that the air in the space around the valve plate can be completely discharged to prevent the contaminated air from flowing back to 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, through the cooperation of the second rotating rod and the first rotating rod, when the first rotating rod rotates, the B end of the second hinged rod is hinged at the B end of the first rotating rod, and the second hinged rod is driven to rotate around the B end of the first rotating rod, so that the first hinged rod and the second hinged rod rotate around the mutual hinge and close together, driving the valve plate as a whole to leave the outer edge plate.

[0011] Furthermore, a fixing plate is provided in the first ventilation channel, and the rotating shaft of the rotating driver is mounted on the fixing plate.

[0012] By adopting the above technical solution, the force on the shaft is more uniform when rotating, thereby increasing the life of the shaft.

[0013] Furthermore, the distance from the rotating shaft to the sliding connection of the B end of the first hinged rod is always greater than the distance from the rotating shaft to the hinged connection of the B end of the second hinged rod.

[0014] By adopting the above-mentioned technical solution, after the valve plate is opened, the rotation amplitude of the second hinged rod is larger, and the rotation amplitude of the first hinged rod is smaller, so that the valve plate will rotate when it is opened, thereby allowing the valve plate to form a certain angle with the first vent, making the air circulation smoother and increasing the ventilation efficiency of the ventilation channel.

[0015] Furthermore, the number of the first hinged rod, the second hinged rod and the first rotating rod are all two, and a first hinged rod, a second hinged rod and a first rotating rod constitute a driving component, and the two driving components are arranged on opposite sides of the valve plate.

[0016] By adopting the above technical solution, by arranging driving components on both sides of the valve plate, the valve plate is made more stable during operation, the force on the rotating shaft is made more uniform, the vibration of the valve plate is reduced, and the life of the rotating shaft is increased.

[0017] Furthermore, the fixing plate is hinged to the second rotating rod.

[0018] By adopting the above-mentioned technical solution, the second rotating rod is installed on the fixed plate, and there is no need to make too many modifications to the ventilation channel, which facilitates the installation of the second rotating rod and reduces the cost of design and manufacturing.

[0019] Furthermore, the first hinged rod is provided with an avoidance groove, and the avoidance groove is adapted to the rotating shaft. When the valve plate is opened, the first hinged rod will approach the rotating shaft and allow the rotating shaft to be embedded in the avoidance groove.

[0020] By adopting the above technical solution, when the first hinged rod approaches the first rotating rod, the first hinged rod and the first rotating rod can be brought closer together through the cooperation of the rotating shaft and the avoidance groove, thereby increasing the movable stroke of the valve plate.

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

[0022] By adopting the aforementioned technical solution, the first hinged rod and the second hinged rod are connected with 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 hinged rod and the second hinged rod are installed on the reinforcement strip, which will not change 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 when it is opened;

[0027] Figure 2 A schematic diagram showing that the first ventilation channel is an air inlet when the ventilation valve is opened;

[0028] Figure 3 It is a schematic diagram of the interior of a ventilation valve;

[0029] Figure 4 A schematic diagram of a ventilation valve when it is closed.

[0030] Figure numerals: 1. Shell; 2. Ventilation channel; 21. First vent; 22. Second vent; 3. Valve plate; 4. Drive assembly; 41. Rotation driver; 42. First rotating rod; 43. First hinged rod; 431. Avoidance groove; 44. Second hinged rod; 45. Rotating shaft; 46. Second rotating rod; 5. Outer edge plate; 6. Sealing ring; 7. Fixed plate; 8. Reinforcement strip. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] like Figure 1 As shown, the utility model provides a ventilation valve, including a housing 1, a ventilation channel 2 is provided in the housing 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 hinged rod 43, a second hinged rod 44, a first rotating rod 42 and a second rotating rod 46, the first hinged rod 43 and the second hinged rod 44 are connected to each other by a rotation drive 41, a first hinged rod 43 and a second hinged rod 44, and a first rotating rod 42 and a second rotating rod 46. 44 are cross-arranged and hinged in the middle part, one of the first hinged rod 43A end and the second hinged rod 44A end is slidably connected to the valve plate 3, and the other is hinged to the valve plate 3, the first hinged rod 43B end is slidably connected to the first rotating rod 42A end, the second hinged rod 44B end is hinged to the first rotating rod 42B end, the second rotating rod 46A end is hinged to the inner wall of the ventilation channel 2, and the hinge axis of the second rotating rod 46A end and the hinge axis of the B end are arranged in a triangle with the axis of the rotating shaft 45.

[0035] After adopting the above technical solution, the utility model has the following advantages: After adopting the above technical solution, when the valve plate 3 is opened, the rotary driver 41 drives the first rotating rod 42 to rotate, so that the first rotating rod 42 squeezes the B end of the second rotating rod 46, so that the B end of the second rotating rod 46 is close to the A end of the first rotating rod 42, so that the A end of the first hinged rod 43 and the A end of the second hinged rod 44 are separated from each other, the A end of the first hinged rod 43 and the B end of the second hinged rod 44 are closed, and the valve plate 3 is driven to move away from the first vent 21. The valve plate 3 moves in the direction of rotation, so that the valve plate 3 has an additional translation amplitude compared with the prior art, thereby reducing the pressure on the valve port when the valve plate 3 is opened. Because in the prior art, the valve plate only has one rotation action to open, this action will cause the sealing ring and other sealing parts on the valve port to be squeezed when the valve plate is opened, and the rotation of the valve plate will form a tangential force, which will cause the sealing parts on the valve port to be squeezed and peeled off by the valve plate, thereby reducing the life of the valve. Therefore, the present invention increases the translation amplitude when the valve plate is opened, thereby reducing or even eliminating the tangential force of the valve plate on the valve port.

[0036] When the rotary driver 41 drives the first rotating rod 42 to rotate, the first rotating rod 42 drives the first hinge rod 43, the second hinge rod 44 and the valve plate 3 to rotate, so that the valve plate 3 and the first rotating rod 42 rotate at the same time. It can be seen that due to the cooperation of the first hinge rod 43, the second hinge rod 44, the first rotating rod 42 and the second rotating rod 46, the valve plate 3 will increase a translation amplitude away from the first vent 21. At the same time, due to the cooperation of the first hinge rod 43 and the second hinge rod 44, the valve plate 3 and the first rotating rod 42 rotate at the same time, which will reduce the tangential force of the valve plate 3 on the valve port compared with the prior art. When the valve plate 3 is completely separated from the first vent 21, the valve plate 3 and the first vent 21 will form a certain angle to prevent the valve plate 3 from blocking the inlet and outlet air, so that the inlet and outlet air A larger flow rate can be obtained, and compared with using two sets of power mechanisms to complete two actions, the utility model adopts one power system to complete two actions at the same time, so that the control cost is reduced, and the cost of operating and debugging the power system is reduced. When the valve plate 3 is closed, due to the cooperation of the first hinged rod 43, the second hinged rod 44, the first rotating rod 42 and the second rotating rod 46, the valve plate 3 presses the first vent 21 through a translational action when closed, which increases the sealing of the first vent 21 compared with the prior art; and compared with traditional valves, the valve of the present application can be completely separated from the first vent 21, thereby eliminating the semi-enclosed space, so that the air in the space around the valve plate 3 can be completely discharged to prevent the contaminated air from flowing back to the laboratory.

[0037] Specifically, the rotation driver 41 is a motor.

[0038] Furthermore, an outer edge plate 5 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 5, and a sealing ring 6 is provided between the valve plate 3 and the outer edge plate 5.

[0039] By adopting the above technical solution, the first ventilation opening 21 can be sealed through the cooperation between the sealing ring 6, the outer edge plate 5 and the valve plate 3.

[0040] Furthermore, when the valve plate 3 is in a fully open state, the valve plate 3 is separated from the outer edge plate 5 .

[0041] By adopting the above-mentioned technical solution, through the cooperation between the second rotating rod 46 and the first rotating rod 42, when the first rotating rod 42 rotates, the B end of the second hinged rod 44 is hinged to the B end of the first rotating rod 42, and the second hinged rod 44 is driven to rotate around the B end of the first rotating rod 42, so that the first hinged rod 43 and the second hinged rod 44 rotate around the mutual hinge and close together, driving the valve plate 3 to leave the outer edge plate 5 as a whole.

[0042] Furthermore, a fixing plate 7 is provided in the first ventilation channel 2 , and a rotating shaft 45 of the rotating driver 41 is mounted on the fixing plate 7 .

[0043] By adopting the above technical solution, the force on the rotating shaft 45 is more uniform when rotating, thereby increasing the service life of the rotating shaft 45.

[0044] Furthermore, the distance from the rotating shaft 45 to the sliding connection of the B end of the first hinged rod 43 is always greater than the distance from the rotating shaft 45 to the hinged connection of the B end of the second hinged rod 44 .

[0045] By adopting the above-mentioned technical solution, when the valve plate 3 is opened, the rotation amplitude of the second hinged rod 44 is larger, and the rotation amplitude of the first hinged rod 43 is smaller, so that the valve plate 3 will rotate when opened, thereby allowing the valve plate 3 to form a certain angle with the first vent 21, making the air circulation smoother and increasing the ventilation efficiency of the ventilation channel 2.

[0046] Furthermore, the number of the first hinged rod 43 , the second hinged rod 44 and the first rotating rod 42 are all two, and a first hinged rod 43 , a second hinged rod 44 and a first rotating rod 42 constitute a driving component, and the two driving components are arranged on opposite sides of the valve plate 3 .

[0047] By adopting the above technical solution, by arranging driving components on both sides of the valve plate 3, the valve plate 3 is made more stable during operation, the force on the rotating shaft 45 is made more uniform, the shaking of the valve plate 3 is reduced, and the life of the rotating shaft 45 is increased.

[0048] Furthermore, the fixing plate 7 is hinged to the second rotating rod 46 .

[0049] By adopting the above technical solution, the second rotating rod 46 is installed on the fixed plate 7, and there is no need to make too many modifications to the ventilation channel 2, which facilitates the installation of the second rotating rod 46 and reduces the cost of design and manufacturing.

[0050] Furthermore, the first hinge rod 43 is provided with an avoidance groove 431 , and the avoidance groove 431 is adapted to the rotating shaft 45 . When the valve plate 3 is opened, the first hinge rod 43 will approach the rotating shaft 45 , and the rotating shaft 45 will be embedded in the avoidance groove 431 .

[0051] By adopting the above technical solution, when the first hinged rod 43 approaches the first rotating rod 42, the first hinged rod 43 and the first rotating rod 42 can be brought closer together through the cooperation of the rotating shaft 45 and the avoidance groove 431, thereby increasing the movable stroke of the valve plate 3.

[0052] Furthermore, a reinforcement strip 8 is fixed to the back side of the valve plate 3 , and the first hinge rod and the second hinge rod are connected to the reinforcement strip 8 .

[0053] By adopting the aforementioned technical solution, the first hinged rod 43 and the second hinged rod 44 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 hinged rod 43 and the second hinged rod 44 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.

[0054] Further, the first vent 21 is an air inlet; or, the second vent 22 is an air inlet.

[0055] 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.

[0056] 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 hinged rod, a second hinged rod, a first rotating rod and a second rotating rod. The rotation driver drives the first rotating rod to rotate. The first hinged rod and the second hinged rod are cross-arranged and hinged in the middle. One of the A end of the first hinged rod and the A end of the second hinged rod is slidably connected to the valve plate, and the other is hinged to the valve plate. The B end of the first hinged rod is slidably connected to the A end of the first rotating rod, the B end of the second hinged rod is hinged to the B end of the first rotating rod, the A end of the second rotating rod is hinged to the inner wall of the ventilation channel, and the hinge axis of the A end of the second rotating rod and the hinge axis of the B end of the second rotating rod are arranged in a triangle with the axis of the rotating shaft of the rotation driver.

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, 2 or 3, characterized in that: A fixing plate is arranged in the first vent, and a rotating shaft of the rotating driver is mounted on the fixing plate.

5. A ventilation valve according to claim 1, 2 or 3, characterized in that: The distance from the rotating shaft to the sliding connection of the B end of the first hinged rod is always greater than the distance from the rotating shaft to the hinged connection of the B end of the second hinged rod.

6. A ventilation valve according to claim 1, 2 or 3, characterized in that: The number of the first hinged rod, the second hinged rod and the first rotating rod are all two, and a first hinged rod, a second hinged rod and a first rotating rod constitute a driving component, and the two driving components are arranged on opposite sides of the valve plate.

7. A ventilation valve according to claim 4, characterized in that: The fixing plate is hinged to the second rotating rod.

8. A ventilation valve according to claim 1, characterized in that: The first hinged rod is provided with an avoidance groove, and the avoidance groove is adapted to the rotating shaft. When the valve plate is opened, the first hinged rod will approach the rotating shaft, and the avoidance groove is sleeved on the rotating shaft.

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

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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