Ventilation valve

Abstract

The utility model discloses a ventilation valve, belongs to the field of ventilation valves, solves the problem of low ventilation efficiency of a traditional ventilation valve, and adopts the technical scheme that the ventilation valve comprises a shell, a ventilation channel is arranged in the shell, and 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 rack, a second rack and a differential assembly used for driving the first rack and the second rack to conduct differential translation, the differential assembly is installed on the shell, and the rotating driver drives the differential assembly. The first rack and the second rack are slidably connected with the shell, one end of the first rack is hinged to the valve plate, and one end of the second rack is slidably connected with the valve plate. The ventilation device is mainly used for improving the air circulation efficiency in the ventilation channel.

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, including 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 includes a rotating driver, a first rack, a second rack and a differential component for driving the first rack and the second rack to translate differentially, the differential component is installed on the shell, the rotating driver drives the differential component, the first rack and the second rack are respectively slidably connected to the shell, one end of the first rack is hinged to the valve plate, and one end of the second rack is slidably connected to the valve plate.

[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 gas flow in this space, and the differential assembly enables the first rack and the second rack to translate differentially, so that the valve plate connected to the first rack and the second rack can be completely separated from the first ventilation port, eliminating this 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 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 translated by the first rack and the second rack, so that the valve plate can be completely separated from the outer edge plate. After the valve plate is completely separated from the outer edge plate, 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 differential assembly includes a driving gear and a reduction gear, the rotary driver is transmission-connected to the driving gear, the reduction gear meshes with the driving gear to achieve speed reduction, the driving gear meshes with the second rack, and the reduction gear meshes with the first rack.

[0012] By adopting the above-mentioned technical solution, a rotating driver is meshed with the driving gear and the reduction gear to enable the first rack and the second rack to achieve simultaneous differential translation, thereby achieving the action of both sides of the valve plate being simultaneously disengaged from the first vent, and the use of a gear meshing connection method can make the differential action of the valve plate more precise. Compared with the solution of using two sets of drivers to simultaneously disengage both sides of the valve plate from the first vent and perform differential translation, it is more economical and practical, and is more convenient to operate, has more accurate transmission, and has low operating and use costs.

[0013] Furthermore, the driving gear includes a first gear meshed with the second rack and a second gear meshed with the reduction gear, the first gear and the second gear are coaxially arranged, and the number of teeth of the second gear is smaller than the number of teeth of the reduction gear.

[0014] By adopting the above-mentioned technical solution, the coaxial arrangement of the first gear and the second gear can make the movement of the first rack and the second rack synchronous, and the number of teeth of the second gear is smaller than the number of teeth of the reduction gear, so that the hinge between the first rack and the valve plate can translate more slowly, so that the valve plate forms a certain angle with the first vent after opening, making the circulation efficiency of the ventilation channel higher.

[0015] Furthermore, the number of the first rack, the second rack and the differential assembly are all two, and a first rack, a second rack and a differential assembly 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, the valve plate is made more stable during operation by arranging the first rack, the second rack and the differential assembly on both sides of the valve plate.

[0017] Furthermore, the rotation driver is arranged outside the shell.

[0018] 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.

[0019] Furthermore, a reinforcement bar is fixed to the back side of the valve plate, and the first rack and the second rack are connected to the reinforcement bar.

[0020] By adopting the aforementioned technical solution, the first rack and the second rack 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 rack and the second rack 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.

[0021] Further, the first vent is an air inlet; or, the second vent is an air inlet.

[0022] 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.

[0023] Furthermore, the extending direction of the reinforcement bar is the same as the sliding direction of the second rack on the reinforcement bar.

[0024] By adopting the above-mentioned technical solution, the sliding distance of the second rack on the reinforcement bar can be longer. 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 is a schematic diagram of the internal parts of the ventilation channel;

[0028] Figure 3 It is a half-section view of the ventilation valve;

[0029] Figure 4 Schematic diagram of the ventilation valve with the valve plate open

[0030] Figure 5 This is a schematic diagram of air flowing into the first channel after the valve plate in the ventilation valve is opened.

[0031] Description of the drawings: 1. Shell; 2. Ventilation channel; 3. First vent; 31. Outer plate; 4. Second vent; 5. Valve plate; 6. Drive assembly; 61. Rotary drive; 62. First rack; 63. Second rack; 7. Differential assembly; 71. Driving gear; 711. First gear; 712. Second gear; 72. Reduction gear; 8. Sealing ring; 9. Reinforcement strip. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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, and a first ventilation port 3 and a second ventilation port 4 are provided at opposite ends of the ventilation channel 2, a valve plate 5 for closing the first ventilation port 3 and a driving component 6 for driving the valve plate 5 to open and close are provided in the ventilation channel 2, the driving component 6 includes a rotating driver 61, a first rack 62, a second rack 63 and a differential component 7 for driving the first rack 62 and the second rack 63 to translate differentially, the differential component 7 is installed on the shell 1, the rotating driver 61 drives the differential component 7, the first rack 62 and the second rack 63 are respectively slidably connected to the shell 1, one end of the first rack 62 is hinged to the valve plate 5, and one end of the second rack 63 is slidably connected to the valve plate 5.

[0036] After adopting the above technical scheme, the utility model has the following advantages: compared with the traditional valve, the traditional valve has one end connected to the valve port, resulting in one side of the ventilation channel 2 and the valve plate 5 forming a semi-closed space, which is not conducive to the flow of gas in this space, and the differential assembly 7 enables the first rack 62 and the second rack 63 to translate differentially, so that the valve plate 5 connected to the first rack 62 and the second rack 63 can be completely separated from the first ventilation port 3, and the gas is discharged from both sides, so that the air in this semi-closed space can be completely discharged.

[0037] Specifically, the rotation driver 61 is a motor.

[0038] Furthermore, an outer edge plate 31 is provided on the outer edge of the first vent 3, and the size of the valve plate 5 is larger than that of the first vent 3. When the valve plate 5 closes the first vent 3, the valve plate 5 abuts against the outer edge plate 31, and a sealing ring 8 is provided between the valve plate 5 and the outer edge plate 31.

[0039] By adopting the above technical solution, the first ventilation opening 3 can be sealed through the cooperation of the sealing ring 8, the outer edge plate 31 and the valve plate 5.

[0040] Furthermore, when the valve plate 5 is in a fully open state, the valve plate 5 is separated from the outer edge plate 31 .

[0041] By adopting the above-mentioned technical solution, the valve plate 5 is translated by the first rack 62 and the second rack 63, so that the valve plate 5 can be completely separated from the outer edge plate 31, and after the valve plate 5 is completely separated from the outer edge plate 31, it will also be completely separated from the sealing ring 8, thereby protecting the sealing ring 8 from being further squeezed during the opening process of the valve plate 5, thereby increasing the life of the sealing ring 8. The traditional valve opening method causes one side of the sealing ring 8 to be further squeezed after the valve plate 5 is opened, thereby reducing the life of this side of the sealing ring and deteriorating the sealing performance.

[0042] Furthermore, the differential assembly 7 includes a driving gear 71 and a reduction gear 72, the rotary driver 61 is transmission-connected to the driving gear 71, the reduction gear 72 is meshed with the driving gear 71 to achieve deceleration, the driving gear 71 is meshed with the second rack 63, and the reduction gear 72 is meshed with the first rack 62.

[0043] By adopting the above-mentioned technical solution, a rotating driver 61 is meshed with the driving gear 71 and the reduction gear 72 to enable the first rack 62 and the second rack 63 to achieve simultaneous differential translation, thereby achieving the action of both sides of the valve plate 5 being simultaneously disengaged from the first vent 3, and the use of a gear meshing connection method can make the differential action of the valve plate 5 more precise. Compared with the solution of using two sets of drivers to simultaneously disengage both sides of the valve plate 5 from the first vent 3 and perform differential translation, it is more economical and practical, and the operation is more precise and the transmission is more accurate.

[0044] Furthermore, the driving gear 71 includes a first gear 711 meshed with the second rack 63 and a second gear 712 meshed with the reduction gear 72 , the first gear 711 and the second gear 712 are coaxially arranged, and the number of teeth of the second gear 712 is smaller than the number of teeth of the reduction gear 72 .

[0045] By adopting the aforementioned technical solution, the coaxial arrangement of the first gear 711 and the second gear 712 can make the movement of the first rack 62 and the second rack 63 synchronous, and the number of teeth of the second gear 712 is smaller than the number of teeth of the reduction gear 72, so that the hinge between the first rack 62 and the valve plate 5 can translate more slowly, so that the valve plate 5 forms a certain angle with the first vent 3 after opening, so that the circulation efficiency of the ventilation channel 2 is higher.

[0046] Furthermore, the number of the first rack 62 , the second rack 63 and the differential assembly 7 are all two, and one first rack 62 , one second rack 63 and one differential assembly 7 constitute a driving component, and the two driving components are arranged on opposite sides of the valve plate 5 .

[0047] By adopting the above technical solution, by arranging the first rack 62 , the second rack 63 and the differential assembly 7 on both sides of the valve plate 5 , the valve plate 5 is made more stable during operation, thereby increasing the service life of the valve plate 5 .

[0048] Furthermore, the rotation driver 61 is arranged outside the housing 1 .

[0049] By adopting the above technical solution, the rotary driver 61 will not be affected by the gas in the ventilation channel 2, and the operation is relatively more stable.

[0050] Furthermore, in order to increase the sealing performance of the valve plate, a reinforcing strip 9 is fixed to the back of the valve plate 5 , and the first rack 62 and the second rack 63 are connected to the reinforcing strip 9 .

[0051] By adopting the aforementioned technical solution, the first rack 62 and the second rack 63 are connected to the reinforcing strip 9 of the valve plate 5, so that the overall strength of the valve plate 5 is higher, thereby ensuring better sealing of the first vent 3, and the first rack 62 and the second rack 63 are installed on the reinforcing strip 9 without changing the structure of the valve plate 5, thereby further improving the sealing of the valve plate 5 to the first vent 3.

[0052] Furthermore, the first ventilation opening 3 is an air inlet.

[0053] By adopting the above-mentioned technical solution, a semi-enclosed space is formed between the opened valve plate 5 and one side of the ventilation channel 2. When the first ventilation port 3 is an air inlet, the gas flow efficiency in the semi-enclosed space can be improved.

[0054] In another embodiment, the second vent 4 is an air inlet. When the second vent 4 is an air inlet, the formation of vortex wind due to gas entering the semi-enclosed space can be reduced, thereby improving the air circulation efficiency.

[0055] Furthermore, in order to increase the sliding stroke of the second rack 63 , the extending direction of the reinforcing bar 9 and the sliding direction of the second rack 63 on the reinforcing bar 9 are made the same.

[0056] By adopting the above technical solution, the sliding distance of the second rack 63 on the reinforcing bar 9 can be longer.

[0057] 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, wherein: The driving assembly includes a rotary driver, a first rack, a second rack, and a differential assembly for driving the first rack and the second rack to translate differentially, the differential assembly is mounted on the housing, the rotary driver drives the differential assembly, the first rack and the second rack are respectively slidably connected to the housing, one end of the first rack is hinged to the valve plate, and one end of the second rack is slidably connected to the valve plate.

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: The differential assembly includes a driving gear and a reduction gear, the rotary driver is connected to the driving gear, the reduction gear is meshed with the driving gear to achieve speed reduction, the driving gear is meshed with the second rack, and the reduction gear is meshed with the first rack.

5. A ventilation valve according to claim 4, characterized in that: The driving gear includes a first gear meshed with the second rack and a second gear meshed with the reduction gear, the first gear and the second gear are coaxially arranged, and the number of teeth of the second gear is smaller than the number of teeth of the reduction gear.

6. A ventilation valve according to claim 1, 2 or 3, characterized in that: The number of the first rack, the second rack and the differential assembly are all two, and a first rack, a second rack and a differential assembly 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 1, 2 or 3, characterized in that: The rotary driver is arranged outside the shell.

8. A ventilation valve according to claim 1, 2 or 3, characterized in that: A reinforcement bar is fixed to the back side of the valve plate, and the first rack and the second rack are connected to the reinforcement bar.

9. 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.

10. A ventilation valve according to claim 8, characterized in that: The extending direction of the reinforcement bar is the same as the sliding direction of the second rack on the reinforcement bar.

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