Backflow prevention device for ventilation valve of clean room

Abstract

The utility model discloses an anti-backflow device for a ventilation valve of a clean room, which relates to the technical field of ventilation valves and comprises a shell, a valve body is mounted at one end of the shell, and a plurality of ventilation baffles are vertically arranged in the shell at equal intervals. The shell is provided with a rotating mechanism used for conducting one-way synchronous rotation on the multiple ventilation baffles. Through the rotating mechanism, the ventilation baffle can be gradually rotated and reset along with weakening of wind power, so that the backflow condition is effectively prevented, the ventilation baffle can be quickly disassembled and assembled during replacement, and the purpose of conveniently and quickly replacing the ventilation baffle can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ventilation valve technical field, specifically a clean room ventilation valve backflow prevention device. BACKGROUND

[0002] The clean room is a high-cleanliness environment space controlled through air filtration, air flow organization and other means, is widely used in microelectronics, biological medicine and other industries, and ensures the environmental quality required by production or scientific research, and the ventilation valve is a pipeline control device for adjusting or cutting off the flow of gaseous medium, is widely used in industrial systems and ventilation environmental protection engineering, and is used for controlling the flow of gaseous medium, and when the clean room is used, in order to accurately control the air volume, maintain the indoor environmental parameters, prevent pollution and the like, the high cleanliness and good working environment of the clean room are ensured, and the air flow needs to be controlled through the ventilation valve.

[0003] The existing ventilation valve can accurately adjust the flow of gas, ensure safety and improve air quality through the terminal during use, and due to the specific application scene and functional requirements of part of the ventilation valve, the backflow prevention structure is not arranged, so that the backflow prevention device needs to be installed to prevent the backflow of air, but in the long-term use, due to abrasion and aging, the performance of the baffle on the backflow prevention device is reduced, and the fault caused by accidental damage occurs, in order to conveniently replace the baffle, based on this, the clean room ventilation valve backflow prevention device is provided, which can eliminate the disadvantages of the existing device. SUMMARY

[0004] The utility model discloses a kind of clean room ventilation valve backflow prevention devices, to solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of clean room ventilation valve backflow prevention device, including shell, valve body is installed in one end of the shell, multiple ventilation baffles are vertically equidistantly arranged in the inside of the shell, rotating mechanism for the one-way synchronous rotation of multiple ventilation baffles is arranged on the shell;

[0007] The rotating mechanism includes:

[0008] Multiple connection sleeve plates vertically equidistantly arranged in the inside of the shell, multiple connection sleeve plates are respectively interlaced with multiple ventilation baffles, and multiple connection sleeve plates are respectively in contact with the outer wall of multiple ventilation baffles.

[0009] On the basis of the above technical scheme, the utility model further provides the following optional technical scheme:

[0010] In an alternative scheme: the rotating mechanism further includes:

[0011] The plug-in assembly is a butt plug integrally formed at the top end of the ventilation baffle, and the connecting sleeve plate is slidingly sleeved on the outer wall of the butt plug;

[0012] The connecting sleeve plate is slidingly sleeved on the outer wall of the butt plug;

[0013] The connecting sleeve plate is slidingly sleeved on the outer wall of the butt plug;

[0014] The connecting sleeve plate is slidingly sleeved on the outer wall of the butt plug;

[0015] The connecting sleeve plate is slidingly sleeved on the outer wall of the butt plug.

[0016] In an alternative, the locking assembly is a bolt arranged at one end of the connecting sleeve plate, the bolt penetrates into the interior of the connecting sleeve plate, the bolt is threadedly connected with the connecting sleeve plate, and the butt plug is sleeved on the outer wall of the bolt.

[0017] In an alternative, the positioning assembly comprises:

[0018] Two connecting baffles are symmetrically arranged in the interior of the connecting sleeve plate, one end of each of the two connecting baffles is fixedly connected with a positioning block, the positioning block penetrates into the interior of the butt plug from the connecting sleeve plate, the outer wall of the end of the positioning block away from the connecting baffle is hemispherical, one end of the connecting baffle away from the positioning block is fixedly connected with a limiting slide rod, and the limiting slide rod, the connecting baffle and the positioning block are slidingly connected with the connecting sleeve plate.

[0019] The limiting slide rod is provided with a reset assembly.

[0020] In an alternative, the reset assembly is a spring sleeved on the outer wall of the limiting slide rod, one end of the spring is in contact with the outer wall of the connecting baffle, and the other end of the spring is in contact with the inner wall of the connecting sleeve plate.

[0021] In an alternative, the transmission assembly comprises:

[0022] Two transmission rods are symmetrically fixedly connected on the outer wall of the connecting sleeve plate, the two transmission rods are respectively located on the two sides of the connecting sleeve plate, the two transmission rods respectively penetrate into the two outer sides of the shell, the two transmission rods are rotatably connected with the shell, one side of each of the two transmission rods away from the connecting sleeve plate is fixedly connected with a gear, the gear is located on the outer wall of the shell, and the outer wall of the gear is meshingly connected with a rack.

[0023] The shell is provided with a moving assembly.

[0024] In an alternative, the moving assembly is a lifting push frame arranged on the outer side of the shell, the lifting push frame has a C-shaped appearance, and the rack is fixedly connected with the lifting push frame.

[0025] The housing is provided with a limiting assembly.

[0026] In an alternative, the limiting assembly comprises:

[0027] Two groups of fixed guide plates are symmetrically fixed to the outer wall of the housing, and a limiting baffle is fixed to the side of the fixed guide plates away from the housing, the lifting push frame is sleeved on the outer wall of the fixed guide plates, and a linear sliding groove for the sliding of the fixed guide plates is formed at the position where the lifting push frame and the fixed guide plates are connected.

[0028] Compared with the prior art, the utility model has the advantages that:

[0029] The ventilation baffle can be gradually rotated and reset as the wind force is weakened, so that the occurrence of backflow is effectively prevented, and the ventilation baffle can be quickly disassembled and installed when being replaced, so that the purpose of conveniently replacing the ventilation baffle is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the utility model.

[0031] Figure 2 It is a structural schematic diagram of the utility model.

[0032] Figure 3 It is a structural schematic diagram of the utility model.

[0033] Figure 4 It is a structural schematic diagram of the utility model. Figure 2 It is a structural schematic diagram of the utility model.

[0034] Figure 5 It is a structural schematic diagram of the utility model. Figure 3 It is a structural schematic diagram of the utility model.

[0035] Mark annotation: 1, housing; 201, gear; 202, transmission rod; 203, bolt; 204, connecting sleeve plate; 205, butt plug; 206, fixed guide plate; 207, limiting baffle; 208, lifting push frame; 209, rack; 2010, limiting sliding rod; 2011, spring; 2012, connecting baffle; 2013, positioning block; 3, ventilation baffle; 4, valve body. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and examples.

[0037] In one embodiment, as Figures 1-5As shown in the figure, a clean room ventilation valve backflow prevention device includes a shell 1, a valve body 4 is installed at one end of the shell 1, a plurality of ventilation baffles 3 are vertically and equidistantly arranged inside the shell 1, and a rotating mechanism for one-way synchronous rotation of the plurality of ventilation baffles 3 is arranged on the shell 1.

[0038] The rotating mechanism includes a plurality of connecting sleeve plates 204 vertically and equidistantly arranged inside the shell 1, the plurality of connecting sleeve plates 204 are interlaced with the plurality of ventilation baffles 3 respectively, and the plurality of connecting sleeve plates 204 are in contact with the outer walls of the plurality of ventilation baffles 3 respectively.

[0039] The rotating mechanism further includes a plug-in assembly arranged on the ventilation baffle 3.

[0040] The plug-in assembly is a butt plug 205 integrally formed at the top end of the ventilation baffle 3, and the connecting sleeve plate 204 is slidingly sleeved on the outer wall of the butt plug 205.

[0041] The connecting sleeve plate 204 is provided with a locking assembly.

[0042] The connecting sleeve plate 204 is provided with a positioning assembly.

[0043] The connecting sleeve plate 204 is provided with a transmission assembly.

[0044] In this embodiment, when in use, the valve body 4 is opened by the controller, at this time the plurality of ventilation baffles 3 are driven to rotate the connecting sleeve plate 204 under the impact of the wind, so as to perform the exhaust operation, when the wind force decreases or stops the exhaust, at this time the ventilation baffle 3 is gradually rotated and reset by the butt plug 205 with the weakening of the wind force, so as to effectively prevent the backflow from occurring.

[0045] When it is necessary to replace the ventilation baffle 3, the ventilation baffle 3 can be conveniently disassembled by the rotating mechanism at this time, and then the reverse operation of the above operation is performed, so as to achieve the purpose of conveniently replacing the ventilation baffle 3.

[0046] In one embodiment, as shown in the figure, Figures 2-3 The locking assembly is a bolt 203 arranged at one end of the connecting sleeve plate 204, the bolt 203 penetrates into the inside of the connecting sleeve plate 204, the bolt 203 is threadedly connected with the connecting sleeve plate 204, the butt plug 205 is sleeved on the outer wall of the bolt 203, and the butt plug 205 can be locked and fixed by the bolt 203, so as to avoid the ventilation baffle 3 from falling during use.

[0047] In one embodiment, as shown in the figure, Figures 2-5As shown, the positioning assembly comprises: two connecting baffles 2012 symmetrically arranged inside the connecting sleeve plate 204, one end of each of the two connecting baffles 2012 is fixedly connected with a positioning clamping block 2013, the positioning clamping block 2013 penetrates through the connecting sleeve plate 204 to the inside of the butt joint plug plate 205, the end of the positioning clamping block 2013 away from the connecting baffle 2012 is hemispherical, the end of the connecting baffle 2012 away from the positioning clamping block 2013 is fixedly connected with a limiting sliding rod 2010, the limiting sliding rod 2010, the connecting baffle 2012 and the positioning clamping block 2013 are all in sliding connection with the connecting sleeve plate 204;

[0048] The limiting sliding rod 2010 is provided with a reset assembly;

[0049] The reset assembly is a spring 2011 sleeved on the outer wall of the limiting sliding rod 2010, one end of the spring 2011 is in contact with the outer wall of the connecting baffle 2012, and the other end of the spring 2011 is in contact with the inner wall of the connecting sleeve plate 204, through the cooperation of the positioning assembly and the reset assembly, the butt joint plug plate 205 can be clamped and positioned, so that the ventilation baffle 3 can be preliminarily installed;

[0050] In one embodiment, as shown in the drawings, Figures 1-4 The transmission assembly comprises: two transmission rods 202 symmetrically fixedly connected to the outer wall of the connecting sleeve plate 204, the two transmission rods 202 are located on the two sides of the connecting sleeve plate 204 respectively, the two transmission rods 202 penetrate to the outside of the two sides of the shell 1 respectively, the two transmission rods 202 are in rotational connection with the shell 1, the two transmission rods 202 are fixedly connected with a gear 201 away from the connecting sleeve plate 204, the gear 201 is located on the outer wall of the shell 1, and the outer wall of the gear 201 is in meshing connection with a rack 209;

[0051] The shell 1 is provided with a moving assembly;

[0052] The moving assembly is a lifting push frame 208 arranged on the outer side of the shell 1, the lifting push frame 208 is in C-shaped in appearance, and the rack 209 is fixedly connected with the lifting push frame 208;

[0053] The shell 1 is provided with a limiting assembly;

[0054] The limiting assembly comprises: two groups of fixed guide plates 206 symmetrically fixedly connected to the outer wall of the shell 1, a limiting baffle 207 fixedly connected to the side of the fixed guide plate 206 away from the shell 1, the lifting push frame 208 is sleeved on the outer wall of the fixed guide plate 206, and a straight sliding groove for sliding of the fixed guide plate 206 is formed at the position where the lifting push frame 208 and the fixed guide plate 206 are in contact, through the cooperation of the transmission assembly, the moving assembly and the limiting assembly, the plurality of ventilation baffles 3 can be synchronously flipped.

[0055] The above embodiment discloses a clean room ventilation valve backflow prevention device, wherein when in use, the valve body 4 is opened by the controller, at this time, the plurality of ventilation baffles 3 are driven to rotate by the wind force, the connecting sleeve plate 204 is driven to rotate, the transmission rod 202 is driven to rotate synchronously by the connecting sleeve plate 204, at this time, the rack 209 is driven to rise by the meshing of the gear 201, the lifting frame 208 slides along the outer wall of the fixed guide plate 206 through the straight line sliding groove, so that the exhaust operation can be performed;

[0056] When the wind force decreases or stops the exhaust, at this time, the ventilation baffle 3 is gradually rotated and reset by the abutting plug plate 205 driven by the wind force, the lifting frame 208 is gradually reset by the transmission rod 202, the gear 201 and the rack 209, until the outer wall of the fixed guide plate 206 contacts the top of the inner wall of the straight line sliding groove, thereby effectively preventing the backflow from occurring;

[0057] When the ventilation baffle 3 needs to be replaced, at this time, the rotating bolt 203 is separated from the abutting plug plate 205, then the lifting frame 208 is pulled up, so that the plurality of ventilation baffles 3 are lifted synchronously, then the ventilation baffle 3 is pulled to drive the abutting plug plate 205 to move, in this process, the positioning clamp block 2013 is extruded by the abutting plug plate 205, the limiting sliding rod 2010 is pushed along the inner wall of the connecting sleeve plate 204 by the connecting baffle 2012, at this time, the spring 2011 is extruded by the connecting baffle 2012 to shrink, until the abutting plug plate 205 is completely separated from the connecting sleeve plate 204, so that the ventilation baffle 3 can be conveniently disassembled, then the reverse operation is performed, so that the ventilation baffle 3 can be conveniently replaced.

[0058] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A clean room ventilation valve backflow prevention device, comprising a shell (1), a valve body (4) is installed at one end of the shell (1), a plurality of ventilation baffles (3) are vertically and equidistantly arranged inside the shell (1), characterized in that, The shell (1) is provided with a rotating mechanism for one-way synchronous rotation of a plurality of ventilation baffles (3); The rotating mechanism comprises a plurality of connecting sleeve plates (204) vertically and equidistantly arranged inside the shell (1), the plurality of connecting sleeve plates (204) are interlaced with the plurality of ventilation baffles (3) respectively, and the plurality of connecting sleeve plates (204) are in contact with the outer walls of the plurality of ventilation baffles (3) respectively.

2. A backflow prevention device for clean room ventilation valves as defined in claim 1, wherein The rotating mechanism further comprises a plug-in assembly arranged on the ventilation baffle (3); The plug-in assembly is a butt plug (205) integrally formed at the top end of the ventilation baffle (3), and the connecting sleeve plate (204) is slidably sleeved on the outer wall of the butt plug (205); The connecting sleeve plate (204) is provided with a locking assembly; The connecting sleeve plate (204) is provided with a positioning assembly; The connecting sleeve plate (204) is provided with a transmission assembly.

3. A backflow prevention device for clean room ventilation valves as defined in claim 2, wherein The locking assembly is a bolt (203) arranged at one end of the connecting sleeve plate (204), the bolt (203) penetrates into the inside of the connecting sleeve plate (204), the bolt (203) is threadedly connected with the connecting sleeve plate (204), and the butt plug (205) is sleeved on the outer wall of the bolt (203).

4. A backflow prevention device for clean room ventilation valves as defined in claim 2, wherein The positioning assembly comprises two connecting baffles (2012) symmetrically arranged inside the connecting sleeve plate (204), one end of each of the two connecting baffles (2012) is fixedly connected with a positioning clamping block (2013), the positioning clamping block (2013) penetrates into the inside of the butt plug (205) from the connecting sleeve plate (204), the outer wall of the end of the positioning clamping block (2013) away from the connecting baffle (2012) is hemispherical, the end of the connecting baffle (2012) away from the positioning clamping block (2013) is fixedly connected with a limiting sliding rod (2010), and the limiting sliding rod (2010), the connecting baffle (2012) and the positioning clamping block (2013) are slidably connected with the connecting sleeve plate (204); The limiting sliding rod (2010) is provided with a reset assembly.

5. A backflow prevention device for clean room ventilation valves as defined in claim 4, wherein The reset assembly is a spring (2011) sleeved on the outer wall of the limiting sliding rod (2010), one end of the spring (2011) is in contact with the outer wall of the connecting baffle (2012), and the other end of the spring (2011) is in contact with the inner wall of the connecting sleeve plate (204).

6. A backflow prevention device for clean room ventilation valves as defined in claim 2, wherein The transmission assembly comprises two transmission rods (202) symmetrically and fixedly connected to the outer wall of the connecting sleeve plate (204), the two transmission rods (202) are located on the two sides of the connecting sleeve plate (204) respectively, the two transmission rods (202) penetrate to the outside of the two sides of the shell (1) respectively, the two transmission rods (202) are rotatably connected with the shell (1), the two transmission rods (202) are fixedly connected with a gear (201) on the side away from the connecting sleeve plate (204), the gear (201) is located on the outer wall of the shell (1), and the outer wall of the gear (201) is engaged with a rack (209). The shell (1) is provided with a moving assembly.

7. A backflow prevention device for clean room ventilation valves as defined in claim 6, wherein The moving assembly is a lifting push frame (208) arranged outside the shell (1), the lifting push frame (208) is in a C-shaped appearance, and the rack (209) is fixedly connected with the lifting push frame (208); The shell (1) is provided with a limiting assembly.

8. A backflow prevention device for clean room ventilation valves as defined in claim 7, wherein The limiting assembly comprises two groups of fixed guide plates (206) which are fixedly connected to the outer wall of the shell (1) in a symmetrical mode, a limiting baffle (207) is fixedly connected to the side, away from the shell (1), of the fixed guide plate (206), the lifting push frame (208) is sleeved on the outer wall of the fixed guide plate (206), and a linear sliding groove is formed in the position, where the lifting push frame (208) and the fixed guide plate (206) are connected, of the lifting push frame (208) and used for sliding of the fixed guide plate (206).

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