Anti-backflow laboratory ventilation structure

Abstract

The utility model relates to the technical field of laboratory ventilation, and discloses an anti-backflow laboratory ventilation structure which comprises a pipeline main body, a bolt is in threaded connection with the interior of the pipeline main body, a dismounting mechanism is arranged on the inner side of the pipeline main body, and blocking sealing mechanisms are arranged on the top and the inner side of the pipeline main body. A blocking sealing mechanism is arranged, a motor is started, the motor drives a threaded rod to rotate, then the threaded rod drives a threaded block to move, the threaded block drives a sliding block to move, a rotating plate is driven to rotate in the sliding block moving process, and therefore the rotating plate drives a blocking plate to rotate; the blocking plate completely covers the inner cavity of the pipeline body, at the moment, the sealing ring makes contact with the cavity wall of the inner cavity of the pipeline body under the elastic force of the first spring, and therefore sealing of the pipeline body can be rapidly completed, gas backflow is prevented, and the work complexity of workers is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory ventilation, and specifically relates to a laboratory ventilation structure with anti-backflow function. Background Technique

[0002] The design purpose of the laboratory ventilation structure with anti-backflow function is to ensure the air quality in the laboratory, protect the health of experimental personnel, and improve the accuracy of experimental results. In the laboratory, various harmful gases may be generated, such as chemical waste gas, bioaerosol, etc. The anti-backflow ventilation structure can ensure that these harmful gases will not re-enter the laboratory due to various reasons (such as air flow fluctuations, equipment failures, etc.) after being discharged, thus protecting the health of experimental personnel.

[0003] As described in a laboratory ventilation pipeline with anti-backflow of waste gas (the authorization announcement is CN220250220U) disclosed on the patent network, "A laboratory ventilation pipeline with anti-backflow of waste gas includes a fixing frame, one side of the fixing frame is fixedly connected with a ventilation pipe, one side of the inner wall of the ventilation pipe is fixedly connected with a fixing frame and a baffle, an activated carbon plate is clamped on the fixing frame, and a filter plate is clamped on the baffle."

[0004] Regarding the above description, the applicant believes that the following problems exist:

[0005] During the use of this utility model, by fixing the fixing frame at a designated position, and then through the internal arrangement of an activated carbon plate, a filter plate, a fan blade, etc. in the ventilation pipeline, and performing odor treatment during ventilation. When the device is not in use, by inserting a sealing plate into the ventilation pipe, backflow can be prevented. However, in actual use, during the use of the device, the sealing plate does not contact the ventilation plate, and it is necessary to manually insert the sealing plate into the ventilation plate, which is likely to increase the work complexity of the staff and is not conducive to the quick sealing of the ventilation pipe. In addition, when replacing the internal parts of the device in the later stage, the whole device needs to be disassembled for replacement, which is not convenient for the staff to quickly disassemble the internal components. Therefore, it is necessary to improve a laboratory ventilation structure with anti-backflow function. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a laboratory ventilation structure with anti-backflow function to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the present utility model provides the following technical solution: A laboratory ventilation structure with anti-backflow function includes a pipeline main body, a bolt is threadedly connected inside the pipeline main body, a disassembly mechanism is arranged inside the pipeline main body, a blocking and sealing mechanism is arranged at the top and inside of the pipeline main body, and a sealing strip is arranged on the front of the pipeline main body;

[0008] The blocking and sealing mechanism includes a blocking component and a sealing component. The sealing component is arranged at the bottom of the blocking component to facilitate sealing during the period when the ventilation duct is not in use and prevent backflow.

[0009] Preferably, the blocking component includes a connecting frame which is fixedly connected to the front of the duct body. A motor is fixedly connected inside the connecting frame. The output end of the motor is fixedly connected with a screw rod. A threaded block is threadedly connected to the outside of the screw rod. The top of the threaded block is rotatably connected with a slider. The top of the slider is fixedly connected with a blocking block. A rotating plate is rotatably connected inside the connecting frame to facilitate driving the blocking plate to rotate so as to close the ventilation duct.

[0010] Preferably, slots are formed at the corresponding positions of the rotating plate and the slider, and the slider is slidably connected in the slots to facilitate driving the rotating plate to rotate.

[0011] Preferably, the sealing component includes a blocking plate which is fixedly connected to the bottom of the rotating plate. A connecting plate is fixedly connected inside the blocking plate. A connecting strip is slidably connected inside the blocking plate. A first spring is fixedly connected between the connecting strip and the connecting plate. A sealing ring is fixedly connected to the outside of the connecting strip to facilitate the blocking plate to block the ventilation duct.

[0012] Preferably, slots are formed at the corresponding positions of the connecting strip and the blocking plate, and the connecting strip is slidably connected in the slots to facilitate preventing leakage around the blocking plate.

[0013] Preferably, the disassembly mechanism includes a connecting frame which is inserted into the inside of the duct body. A flow guide plate is clamped to the front of the connecting frame. Clamping frames are fixedly connected to the top and bottom of the connecting frame. An exhaust fan is fixedly connected to the inside of the connecting frame. An activated carbon filter plate is arranged inside the connecting frame. A filter plate is arranged inside the connecting frame. A clamping block is slidably connected to the inside of the duct body. A fixed frame is fixedly connected to the left side of the clamping block. A second spring is fixedly connected between the duct body and the clamping block. A fixed block is slidably connected to the inside of the duct body to facilitate subsequent disassembly and maintenance of internal components by the staff.

[0014] Preferably, slots are formed at the corresponding positions of the clamping block and the clamping frame, and the clamping block is inserted into the slots to facilitate the staff to quickly disassemble the connecting frame.

[0015] Compared with the prior art, the present utility model provides a laboratory ventilation structure for preventing backflow, which has the following beneficial effects:

[0016] 1. The laboratory ventilation structure with anti-backflow function, through the set blocking and sealing mechanism, starts the motor. The motor drives the screw to rotate, and the screw drives the threaded block to move. Then the threaded block drives the slider to move, and during the movement of the slider, it drives the rotating plate to rotate. Thus, the rotating plate drives the blocking plate to rotate, making the blocking plate completely cover the inner cavity of the pipeline main body. At this time, the sealing ring contacts the inner cavity wall of the pipeline main body under the elastic force of the first spring, so as to quickly complete the sealing of the pipeline main body, prevent gas backflow, and further reduce the work complexity of the staff.

[0017] 2. The laboratory ventilation structure with anti-backflow function, through the set disassembly mechanism, pulls up the fixed block, and then pulls the block to the left, so that the block completely disengages from the card frame. During the movement of the block, it drives the fixed frame to move, so that the fixed frame enters the corresponding slot of the fixed block. At this time, pull down the fixed block, so that the fixed block is stuck into the corresponding slot of the fixed frame, thus completing the fixation of the block, and the entire connecting frame can be easily taken out from the inside of the pipeline main body, which is convenient for the staff to quickly replace the internal filter plate, activated carbon filter plate and repair the internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:

[0019] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the left cross-sectional view of the present invention;

[0021] Figure 3 It is a schematic diagram of the external structure of the blocking and sealing mechanism of the present invention;

[0022] Figure 4 It is a schematic diagram of the unfolded structure of the blocking component of the present invention;

[0023] Figure 5 It is a schematic diagram of the unfolded structure of the sealing component of the present invention;

[0024] Figure 6 It is a schematic diagram of the left view structure of the disassembly mechanism of the present invention;

[0025] Figure 7 It is a schematic diagram of the unfolded structure of the card frame and the connected parts of the present invention.

[0026] In the figure: 1. Pipeline main body; 2. Bolt; 3. Blocking and sealing mechanism; 4. Disassembly mechanism; 5. Sealing strip; 31. Blocking component; 32. Sealing component; 311. Connecting frame; 312. Motor; 313. Screw rod; 314. Threaded block; 315. Slide block; 316. Stopper; 317. Rotating plate; 321. Blocking plate; 322. Connecting plate; 323. First spring; 324. Connecting bar; 325. Sealing ring; 41. Connecting frame; 42. Deflector; 43. Clamping frame; 44. Exhaust fan; 45. Activated carbon filter plate; 46. Filter plate; 47. Clamping block; 48. Fixed frame; 49. Second spring; 410. Fixed block. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] Embodiment 1:

[0030] Please refer to Figure 1-7 , the present invention provides a technical solution: a laboratory ventilation structure for preventing backflow, including a pipeline main body 1, a bolt 2 is threadedly connected inside the pipeline main body 1, a disassembly mechanism 4 is arranged inside the pipeline main body 1, a blocking and sealing mechanism 3 is arranged at the top and inside of the pipeline main body 1, and a sealing strip 5 is arranged on the front of the pipeline main body 1;

[0031] The blocking and sealing mechanism 3 includes a blocking component 31 and a sealing component 32. The sealing component 32 is arranged at the bottom of the blocking component 31, which is convenient for sealing during the period when the ventilation pipeline is not in use and preventing backflow.

[0032] Further, the blocking assembly 31 includes a connecting frame 311. The connecting frame 311 is fixedly connected to the front of the pipe body 1. A motor 312 is fixedly connected inside the connecting frame 311. A screw rod 313 is fixedly connected to the output end of the motor 312. A threaded block 314 is threadedly connected to the outside of the screw rod 313. A slider 315 is rotatably connected to the top of the threaded block 314. A stopper 316 is fixedly connected to the top of the slider 315. A rotating plate 317 is rotatably connected inside the connecting frame 311, which is convenient for driving the blocking plate 321 to rotate, so as to close the ventilation duct.

[0033] Further, slots are formed at the corresponding positions of the rotating plate 317 and the slider 315, and the slider 315 is slidably connected in the slots, which is convenient for driving the rotating plate 317 to rotate.

[0034] Further, the sealing assembly 32 includes a blocking plate 321. The blocking plate 321 is fixedly connected to the bottom of the rotating plate 317. A connecting plate 322 is fixedly connected inside the blocking plate 321. A connecting strip 324 is slidably connected inside the blocking plate 321. A first spring 323 is fixedly connected between the connecting strip 324 and the connecting plate 322. A sealing ring 325 is fixedly connected to the outside of the connecting strip 324, which is convenient for the blocking plate 321 to block the ventilation duct.

[0035] Further, slots are formed at the corresponding positions of the connecting strip 324 and the blocking plate 321, and the connecting strip 324 is slidably connected in the slots, which is convenient for preventing leakage around the blocking plate 321.

[0036] Embodiment 2:

[0037] Please refer to Figure 6-7 , and in combination with Embodiment 1, it is further obtained that the disassembly mechanism 4 includes a connecting frame 41. The connecting frame 41 is inserted into the pipe body 1. A flow guide plate 42 is clamped to the front of the connecting frame 41. Clamping frames 43 are fixedly connected to the top and bottom of the connecting frame 41. An exhaust fan 44 is fixedly connected to the inner side of the connecting frame 41. An activated carbon filter plate 45 is arranged on the inner side of the connecting frame 41. A filter plate 46 is arranged on the inner side of the connecting frame 41. A clamping block 47 is slidably connected inside the pipe body 1. A fixed frame 48 is fixedly connected to the left side of the clamping block 47. A second spring 49 is fixedly connected between the pipe body 1 and the clamping block 47. A fixed block 410 is slidably connected inside the pipe body 1, which is convenient for subsequent workers to disassemble and repair the internal components.

[0038] Further, slots are formed at the corresponding positions of the clamping block 47 and the clamping frame 43, and the clamping block 47 is inserted into the slots, which is convenient for workers to quickly disassemble the connecting frame 41.

[0039] In the actual operation process, when the device is in use, first, the device quickly discharges the laboratory gas outside the laboratory through the exhaust fan 44, and passes through the activated carbon filter plate 45 and the filter plate 46, so as to remove some harmful substances and odors in the gas. When the device is used for a long time and the internal filter plate 46 needs to be replaced, through the disassembly mechanism 4 provided, the fixing block 410 is pulled upward, and then the clamping block 47 is pulled to the left, so that the clamping block 47 is completely disengaged from the clamping frame 43. And during the movement of the clamping block 47, the fixing frame 48 is driven to move, so that the fixing frame 48 enters the corresponding slot of the fixing block 410. At this time, the fixing block 410 is pulled down, so that the fixing block 410 is clamped into the corresponding slot of the fixing frame 48, thus completing the fixation of the clamping block 47, and the entire connecting frame 41 can be easily taken out from the inside of the pipe body 1. And when the ventilation pipe is not in use, through the blocking and sealing mechanism 3 provided, the motor 312 is started, the screw 313 is driven to rotate by the motor 312, and then the threaded block 314 is driven to move by the screw 313, so that the threaded block 314 drives the slider 315 to move. And during the movement of the slider 315, the rotating plate 317 is driven to rotate, so that the blocking plate 321 is driven to rotate by the rotating plate 317, so that the blocking plate 321 completely covers the inner cavity of the pipe body 1. At this time, the sealing ring 325 contacts the inner cavity wall of the pipe body 1 under the elastic force of the first spring 323.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A laboratory ventilation structure for preventing backflow, including a duct main body (1), characterized in that: A bolt (2) is internally threadedly connected inside the pipe body (1). A disassembly mechanism (4) is arranged inside the pipe body (1). A blocking and sealing mechanism (3) is provided at the top and inside of the pipe body (1). A sealing strip (5) is provided on the front of the pipe body (1). The blocking and sealing mechanism (3) includes a blocking component (31) and a sealing component (32). The sealing component (32) is arranged at the bottom of the blocking component (31). The disassembly mechanism (4) includes a connecting frame (41). The connecting frame (41) is inserted inside the pipe body (1). A flow guiding plate (42) is clamped on the front of the connecting frame (41). Clamping frames (43) are fixedly connected to the top and bottom of the connecting frame (41). An air outlet fan (44) is fixedly connected to the inside of the connecting frame (41). An activated carbon filter plate (45) is arranged inside the connecting frame (41). A filter plate (46) is arranged inside the connecting frame (41). A clamping block (47) is slidably connected inside the pipe body (1). A fixed frame (48) is fixedly connected to the left side of the clamping block (47). A second spring (49) is fixedly connected between the pipe body (1) and the clamping block (47). A fixed block (410) is slidably connected inside the pipe body (1).

2. The laboratory ventilation structure for preventing backflow according to claim 1, characterized in that: The blocking component (31) includes a connecting frame (311). The connecting frame (311) is fixedly connected to the front of the pipe body (1). A motor (312) is fixedly connected inside the connecting frame (311). A screw rod (313) is fixedly connected to the output end of the motor (312). A threaded block (314) is externally threadedly connected to the screw rod (313). A slider (315) is rotatably connected to the top of the threaded block (314). A blocking block (316) is fixedly connected to the top of the slider (315). A rotating plate (317) is rotatably connected inside the connecting frame (311).

3. The laboratory ventilation structure for preventing backflow according to claim 2, characterized in that: Grooves are formed at the corresponding positions of the rotating plate (317) and the slider (315), and the slider (315) is slidably connected in the grooves.

4. The laboratory ventilation structure against backflow according to claim 2, characterized in that: The sealing component (32) includes a blocking plate (321). The blocking plate (321) is fixedly connected to the bottom of the rotating plate (317). A connecting plate (322) is fixedly connected inside the blocking plate (321). A connecting strip (324) is slidably connected inside the blocking plate (321). A first spring (323) is fixedly connected between the connecting strip (324) and the connecting plate (322). A sealing ring (325) is fixedly connected to the outside of the connecting strip (324).

5. A laboratory ventilation structure for preventing backflow according to claim 4, characterized in that: Grooves are formed at the corresponding positions of the connecting strip (324) and the blocking plate (321), and the connecting strip (324) is slidably connected in the grooves.

6. The laboratory ventilation structure for preventing backflow according to claim 1, characterized in that: Grooves are formed at the corresponding positions of the clamping block (47) and the clamping frame (43), and the clamping block (47) is inserted in the grooves.

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