Ventilation cabinet convenient to maintain and adjust

Abstract

The invention relates to the technical field of ventilation cabinets, in particular to a ventilation cabinet convenient to maintain and adjust, aims to solve the technical problem of overcoming the defects of operability and safety in the prior art, and is mainly realized through the following technical scheme. Comprising a cabinet body frame, an operation cabinet body and a storage cabinet body, the operation cabinet body comprises an operation window, an operation table top and a flow guide assembly, the storage cabinet body comprises a middle bracket and a storage cabinet body, a lifting part for controlling the operation table top to ascend and descend is arranged in the middle bracket, the operation window is connected with a traction structure and an anti-falling assembly, and the anti-falling assembly is connected with a touch part. The height of the operation table top can be increased and decreased to adjust local space and distance, the size of an opening of an air curtain piece can be controlled to avoid gas leakage at the table top when the table top is increased and decreased, a detachable ventilation cabinet is arranged to facilitate maintenance and overhaul, and an anti-falling assembly guarantees the safety of an operation window.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fume hoods, and particularly relates to a fume hood convenient to maintain and adjust. BACKGROUND

[0002] A fume hood is an indispensable part of a laboratory ventilation system, and is used to prevent laboratory workers from inhaling or swallowing toxic, pathogenic or unknown toxic chemical substances and organisms. Such experiments are often carried out in a fume hood. A cabinet exhaust hood, commonly known as a fume hood, is similar to a closed hood. A large room-type fume hood has an open side, and a ventilation device is arranged at the top of the cabinet. The operator works in the cabinet, and various harmful gases, odors, moisture, flammable and corrosive substances generated during the experiment are discharged by the ventilation device to protect the safety of the operator and prevent the spread of pollutants to the laboratory.

[0003] The fume hood in the prior art is generally designed to be universal, and has a fixed overall height and a one-piece structure. The height of the operation table is fixed and cannot be adjusted according to the height of the operator or the height of the equipment. Some fume hoods that can adjust the height of the operation table do not have upper and lower limits for the lifting of the operation table, and the lifting of the operation table is independent of the ventilation system. There is a possibility of gas leakage from the raised table, which affects the experimental environment. The one-piece structure of the fume hood is not conducive to maintenance and adjustment, such as installation and maintenance of the equipment in the upper and lower cabinets, adjustment of the internal wiring of the cabinet, cleaning of the waste water tank, and replacement of the operation table. In addition, the operation safety of the fume hood also needs to be concerned. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defects of operability and safety in the prior art, and to provide a fume hood convenient to maintain and adjust.

[0005] The above technical object of the present application is achieved by the following technical scheme: A fume hood convenient to maintain and adjust, comprising a cabinet frame, an operation cabinet and a storage cabinet, the cabinet frame is a vertical square with an opening on the front side, the operation cabinet and the storage cabinet are both installed in the cabinet frame, the operation cabinet is installed above the storage cabinet, a water supply device and an air supply device are also arranged side by side near the middle of the operation cabinet, and a ventilation assembly is further arranged above the operation cabinet. The operation cabinet body comprises an operation window, an operation table top and a flow guide assembly, the operation window is obliquely arranged and is installed in a lifting manner at the front side of the cabinet body frame, the front side of the cabinet body frame is provided with sliding rails corresponding to the operation window, the sliding rails are oppositely arranged at the opposite ends of the front side of the cabinet body frame, the operation table top is horizontally arranged and is installed at the inner side of the cabinet body frame close to the middle part, a water receiving groove is formed in the operation table top corresponding to a water supply element, and the flow guide assembly is installed in the cabinet body frame. The storage cabinet body comprises a middle bracket and a plurality of storage cabinet bodies, the middle bracket is arranged on the storage cabinet body, the top of the middle bracket is provided with an operation table top, the middle bracket contains a drainage element which is clamped with the water receiving groove, the drainage element extends from the middle bracket to the outside of the cabinet body frame, and a lifting element for controlling the lifting of the operation table top is further arranged in the middle bracket; the storage cabinet bodies are installed in an array below the middle bracket and are fixed with the side walls of the cabinet body frame.

[0006] By adopting the above technical scheme, the outer frame of the cabinet body frame is designed in an integrated manner with a steel plate, functional partitions are arranged in the cabinet body frame, the upper half of the cabinet body frame is an operation cabinet body for experimental operation, and the lower half is a storage cabinet body for storage function, and the upper part of the storage cabinet body is a water, electricity and gas pipeline which is integrated at the same position, so that overall detection and maintenance operation is facilitated; the operation table top is designed to be height-adjustable to adjust the local space and distance, and the opening size of the air curtain element can be controlled when the operation table top is lifted to prevent gas leakage from the operation table top; the detachable fume hood is provided to facilitate maintenance and repair, and the anti-falling assembly ensures the safety of the operation window.

[0007] Further, the inclination angle of the operation window and the front side of the cabinet body frame is 8°-10°, the operation window is obliquely arranged towards the inner side of the cabinet body frame, the operation window is connected with a traction structure, the operation window is further connected with an anti-falling assembly, the operation window comprises a window frame and two layers of parallel perspective windows, the window frame is wrapped around the two layers of perspective windows, the window frame is slidingly arranged in the sliding rail, the sliding rail is also vertically and obliquely arranged at the front side of the cabinet body frame, and a pushing groove is formed in the front side of the bottom of the window frame along the length direction of the window frame.

[0008] By adopting the above technical scheme, the inclination angle is suitable for the observation angle of the human body to facilitate experimental operation; the traction structure realizes the up-down sliding operation of the operation window, the pushing groove facilitates the force exerted by the human hand to control the operation window, and the sliding rail limits the operation window to ensure that the operation window is always at a stable inclination angle.

[0009] Further, the window frame top end extends with a traction block connected to the traction structure, the traction structure includes two traction ropes, a counterweight and two groups of traction wheel groups, each of the traction ropes is fixed on one end of the traction block and the other end is fixed on the counterweight opposite to the corresponding traction block, two groups of the traction wheel groups are respectively arranged in the cabinet frame on both sides near the top and correspond to the window frame, the traction ropes are respectively fixed on the counterweight through the corresponding side traction wheel group, each group of the traction wheel group includes a first wheel group and a second guide wheel, the first wheel group is arranged on one side close to the sliding rail, the second guide wheel is arranged in the cabinet frame on the top close to the rear side, and the counterweight is slidingly arranged in the rear side of the cabinet frame.

[0010] By adopting the above technical scheme, the traction block cooperates with the window frame to realize the traction action of the operation window, the traction rope connects the counterweight and the operation window to realize the balance of the two and adjust the size of the opened operation window under the action of external force to realize the basic function of the fume hood; the traction wheel group is a fixed pulley, the direction of the force on the traction rope is changed to realize the balance of the front and rear counterweights and the operation window.

[0011] Further, the first wheel group includes two first guide wheels and second guide wheels arranged in parallel and side by side, a gap is left between the first guide wheel and the second guide wheel, and a touch wheel is arranged, the touch wheel is arranged below the first guide wheel and the second guide wheel and has an axis parallel to the first guide wheel and the second guide wheel, the touch wheel is also vertically slidingly arranged on the side wall of the cabinet frame, the traction rope is sequentially arranged around the first guide wheel, the touch wheel, the second guide wheel and the second guide wheel and is fixed at the end of the counterweight, and the touch wheel is provided with a touch piece connected with the anti-falling assembly.

[0012] By adopting the above technical scheme, the touch wheel is connected with the touch piece to finally realize the connection with the anti-falling assembly, realize the emergency anti-falling operation in the case of breaking of the traction rope, and ensure the safety of the fume hood.

[0013] Further, the touch piece includes a touch rack, a touch gear and a touch rod, the touch rack is fixed with the axis of the touch wheel and is arranged in mesh with the touch gear, the touch gear is arranged in parallel with the axis of the touch wheel and is arranged on one side of the touch rack close to the sliding rail, and the touch rod is rotatably installed on one side of the touch gear and is connected with the anti-falling assembly on the other end.

[0014] By adopting the above technical scheme, the touch gear loses the traction force of lifting the traction rope after the traction rope breaks, and freely falls under the action of gravity, drives the touch rack to slide down and meshes with the touch gear to drive the touch gear to rotate clockwise, the touch rod on the touch gear is separated from the anti-falling assembly, so that the linkage operation of the anti-falling assembly is realized, and the subsequent anti-falling assembly cooperates with the falling operation window.

[0015] Further, the anti-falling assembly comprises an anti-falling clamp and a plurality of anti-falling teeth, the anti-falling clamp is arranged in parallel with the sliding rail and is slidingly arranged in the cabinet frame, a limiting slide is arranged in the cabinet frame corresponding to the anti-falling clamp, a clamping groove is arranged on the limiting slide corresponding to the triggering rod, the size of the clamping groove is not less than the size of the end of the triggering rod, the anti-falling teeth are arranged in an array along the length direction of the anti-falling clamp and are clamped with the sliding rail, a clamping groove is arranged on the sliding rail corresponding to the anti-falling teeth, the shape of the clamping groove is larger than the shape of the anti-falling teeth, and a plurality of clamping teeth are further extended from one side of the window frame close to the anti-falling teeth and are arranged along the height direction of the window frame.

[0016] By adopting the above technical scheme, after the triggering rod is separated from the clamping groove, the anti-falling clamp slides down under the action of gravity and the anti-falling teeth extend out of the clamping groove, the clamping teeth and the anti-falling teeth are engaged and buckled to clamp the operation window, thereby realizing the anti-falling function and avoiding the operation window from falling and hurting people.

[0017] Further, the drainage device comprises a drainage basin, a drainage pipe and a support frame, the drainage pipe is connected to the bottom of the drainage basin, the other end of the drainage pipe extends outside the cabinet frame, the support frame is installed on one side of the cabinet frame and is clamped with the drainage pipe, abutting plates are arranged on the top of the support frame and in the cabinet frame corresponding to the top of the support frame, and the abutting plates are arranged below the operation table top.

[0018] By adopting the above technical scheme, the drainage device is arranged corresponding to the water feeding device, the drainage basin receives waste liquid and sends it out of the fume hood through the drainage pipe, and the support frame realizes installation and fixation of the drainage pipe; the abutting plates are arranged on the top of the support frame and in the cabinet frame and are arranged corresponding to the operation table top, and in the case that the operation table top is not raised, the abutting plates abut against the operation table top to support the operation table top.

[0019] Further, the operation table top comprises an integrated contact table top, a shielding table top and a limiting table top which constitute a broken line type, the shielding table top is arranged perpendicularly to the contact table top and is arranged at the bottom of the front side of the contact table top, the limiting table top is arranged perpendicularly to the shielding table top and is parallel to the operation table top, the limiting table top is arranged perpendicularly at the bottom of the shielding table top, a water receiving groove is arranged on the contact table top, the bottom of the contact table top is connected with the output shaft of the lifting device, and the front side of the shielding table top is further arranged corresponding to the flow guide assembly.

[0020] By adopting the above technical scheme, the broken line type operation table top design can avoid exposing the internal condition of the fume hood; the contact table top, the shielding table top and the limiting table top can be made of different materials, the contact table top is used for experimental operation, the shielding table top is used for shielding the front side after being raised, and the limiting table top is used for limiting operation after the operation table top is raised to a certain height to avoid structural interference caused by the operation table top being raised too high.

[0021] Further, the air guide assembly comprises an air guide and an air curtain part, the air guide is arranged at the top of the cabinet frame and the rear side of the cabinet frame, the air guide comprises an inclined air guide plate and a straight air guide plate, the straight air guide plate is fixed on the inner rear side of the cabinet frame by bolts and has a gap with the inner rear side of the cabinet frame, the inclined air guide plate is arranged above the straight air guide plate, the top of the inclined air guide plate is fixed with the middle part of the top of the cabinet frame, and the bottom of the inclined air guide plate is fixed with the top of the straight air guide plate, the air curtain part is arranged beside the operation table corresponding to the operation window, and the air curtain part is connected with the shielding table.

[0022] By adopting the above technical scheme, the air guide assembly is arranged to make the internal air flow smooth and gentle, so that the air flow can run smoothly, the air flow collision is avoided, the generation of turbulent flow is reduced, the overflow of harmful gas is also avoided, the air speed in the fume hood is more uniform, and the safety of the experimenter is ensured; the air curtain part is connected with the shielding table, the opening size of the air curtain part is adjusted after the shielding table is lifted, and the safety of the experimental operation is ensured.

[0023] Further, the air curtain part comprises an extension plate, an adjusting plate and an adjusting part, the extension plate is arc-shaped and is fixed beside the operation table corresponding to the operation window, the inner concave surface of the extension plate faces the operation table, an air outlet is formed in the top of the extension plate, the adjusting plate is rotatably installed in the extension plate and is arranged opposite to the air outlet, the adjusting part is arranged along the length direction of the adjusting plate and comprises an adjusting rack and a plurality of adjusting gears which are meshed with each other, the adjusting gears are rotatably installed below the extension plate and are fixed with the adjusting plate, and the adjusting rack is vertically fixed on the shielding table.

[0024] By adopting the above technical scheme, the adjusting part moves with the shielding table to drive the adjusting plate to control the size of the air outlet, so that the size of the air outlet is adjusted.

[0025] In summary, the technical scheme of the present application has the following advantages: 1. The fume hood provided by the present application is convenient to maintain and adjust, the operation table is designed to be height-adjustable to adjust the local space and distance, and the opening size of the air curtain part can be controlled when the operation table is lifted to avoid gas leakage from the operation table.

[0026] 2. The fume hood provided by the present application is convenient to maintain and adjust, the touch rod is driven to move away from the anti-falling assembly by the touch gear after the traction rope is broken, so that the linkage operation of the anti-falling assembly is realized, the subsequent anti-falling assembly and the falling operation window are matched, and the safety of the operation window is ensured by the anti-falling assembly.

[0027] 3. The fume hood provided by the present application is convenient to maintain and adjust, the detachable fume hood is convenient to maintain and repair, and the three-section fume cabinet is designed to be detachable and convenient to maintain and repair, so that the subsequent maintenance operation is facilitated. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of a fume hood that is easy to maintain and adjust, provided in one embodiment of the present invention. Figure 2 This is a schematic diagram of the internal structure of a fume hood that is easy to maintain and adjust, provided in one embodiment of the present invention. Figure 3 This is a cross-sectional structural diagram of a fume hood that is easy to maintain and adjust, provided in one embodiment of the present invention. Figure 4 This is a partial structural diagram of the traction structure and fall arrestor provided in one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a storage cabinet provided in one embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures: 1. Cabinet frame; 11. Sliding rail; 111. Snap-fit ​​groove; 112. Engaging groove; 12. Limiting slide; 2. Operating cabinet; 21. Water supply component; 22. Air supply component; 23. Ventilation assembly; 3. Operating window; 31. Window frame; 311. Traction block; 312. Engaging teeth; 32. Viewing window; 4. Operating tabletop; 41. Contact tabletop; 411. Water collection tray; 42. Covering tabletop; 43. Restricting tabletop; 5. Airflow guiding assembly; 51. Air guide component; 511. Angled air guide plate; 512. Straight air guide plate; 52. Air curtain component; 521. Extension plate; 5211. Air outlet; 522. Adjusting plate; 523. Adjusting component; 523 1. Adjusting rack; 5232. Adjusting gear; 6. Storage cabinet; 61. Intermediate bracket; 611. Drainage component; 6111. Drain basin; 6112. Drain pipe; 6113. Support frame; 6114. Abutment plate; 612. Lifting component; 62. Storage cabinet; 7. Traction structure; 71. Traction rope; 72. Counterweight; 73. Traction wheel set; 731. First wheel set; 7311. First guide wheel; 7312. Second guide wheel; 732. Second guide wheel; 74. Actuating wheel; 75. Actuating component; 751. Actuating rack; 752. Actuating gear; 753. Actuating rod; 8. Fall protection component; 81. Fall protection clip; 82. Fall protection tooth. Detailed Implementation

[0031] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application.

[0032] A ventilation cabinet convenient to maintain and adjust, as shown in Figure 1 and Figure 2 , comprises a cabinet frame 1, an operation cabinet 2 and a storage cabinet 6, the cabinet frame 1 is a vertical rectangular cuboid cabinet with an opening on the front side, the operation cabinet 2 and the storage cabinet 6 are both installed in the cabinet frame 1, the operation cabinet 2 is installed above the storage cabinet 6, and a water feeding element 21 and an air feeding element 22 are also arranged side by side near the middle part of the operation cabinet 2, the water feeding element 21 is arranged near the front side of the operation cabinet 2, and a ventilation assembly 23 is further arranged above the operation cabinet 2. The outer frame of the cabinet frame 1 is designed in one piece with a steel plate, functional partitions are arranged in the cabinet frame 1, the upper half is the operation cabinet 2 for experimental operation, and the lower half is the storage cabinet 6 for storage function, and the upper part of the storage cabinet 6 is a water, electricity and gas pipeline, which is integrated at the same position, so as to facilitate overall detection and maintenance operation.

[0033] The operation cabinet 2 comprises an operation window 3, an operation table 4 and a flow guide assembly 5, the operation window 3 is arranged obliquely and is installed in the front side of the cabinet frame 1, the front side of the cabinet frame 1 is provided with sliding rails 11 corresponding to the operation window 3, the sliding rails 11 are arranged at opposite ends of the front side of the cabinet frame 1 and along the height of the cabinet frame 1, the operation table 4 is arranged horizontally and is installed near the middle part of the cabinet frame 1, a water receiving groove 411 is formed on the operation table 4 corresponding to the water feeding element 21, and the flow guide assembly 5 is installed in the cabinet frame 1.

[0034] The storage cabinet 6 comprises a middle bracket 61 and a plurality of storage cabinets 62, the middle bracket 61 is arranged on the storage cabinets 62, the middle bracket 61 is provided with the operation table 4 on the top, the middle bracket 61 contains a drainage element 611 which is connected with the water receiving groove 411, the drainage element 611 extends from the middle bracket 61 to the outside of the cabinet frame 1, and the middle bracket 61 is further provided with a lifting element 612 for controlling the lifting of the operation table 4; the storage cabinets 62 are installed in an array below the middle bracket 61 and are fixed with the side walls of the cabinet frame 1, and a maintenance opening can be formed on both sides of the storage cabinet 6, so as to facilitate the maintenance operation of the inside of the cabinet frame 1.

[0035] As shown in Figure 2 , Figure 3 and Figure 5As shown, the operation table 4 includes a contact table 41, a shielding table 42 and a limiting table 43 which are integrally arranged and constitute a broken line type, the shielding table 42 is arranged vertically with the contact table 41 and is arranged at the bottom of the front side of the contact table 41, the limiting table 43 is arranged vertically with the shielding table 42 and is parallel to the operation table 4, the limiting table 43 is arranged vertically at the bottom of the front side of the shielding table 42, the contact table 41 is provided with a water receiving groove 411, the bottom of the contact table 41 is connected with the output shaft of the lifting member 612, the lifting member 612 is a plurality of reciprocating motors arranged in an array and the output shaft is arranged vertically, and the front side of the shielding table 42 is also arranged corresponding to the flow guide assembly 5. The broken line type of the operation table 4 can avoid exposing the internal situation of the fume hood; the contact table 41, the shielding table 42 and the limiting table 43 can be made of different materials, the contact table 41 is used for experimental operation, the shielding table 42 is used for shielding the front side after being raised, and the limiting table is used for limiting operation after the operation table 4 is raised to a certain height to avoid structural interference caused by the operation table 4 being raised too high.

[0036] As shown in Figure 2 , Figure 3 and Figure 5 , the flow guide assembly 5 includes a wind guide 51 and a wind curtain 52, the wind guide 51 is arranged at the top inside of the cabinet frame 1 and the rear side of the cabinet frame 1, the wind guide 51 includes an inclined wind guide plate 511 and a straight wind guide plate 512, the straight wind guide plate 512 is fixed on the inner rear side of the cabinet frame 1 by bolts and has a gap with the inner rear side of the cabinet frame 1, the bottom of the straight wind guide plate 512 also has a gap with the contact table 41, the inclined wind guide plate 511 is arranged obliquely above the straight wind guide plate 512, the top of the inclined wind guide plate 511 is fixed with the middle part of the top of the cabinet frame 1, and the bottom of the inclined wind guide plate 511 is fixed with the top of the straight wind guide plate 512, the wind curtain 52 is arranged corresponding to the operation window 3 at the front side of the operation table 4, and the wind curtain 52 is also connected with the shielding table 42.

[0037] The air curtain piece 52 comprises an extension plate 521, an adjusting plate 522 and an adjusting piece 523. The extension plate 521 is arc-shaped and fixed at the corresponding operation window 3 of the cabinet frame 1. The extension plate 521 is arranged along the length direction of the contact table top 41 and located at the front side of the contact table top 41. The inner concave surface of the extension plate 521 faces the operation table top 4. An air outlet 5211 is formed at the top of the extension plate 521. The adjusting plate 522 is rotatably arranged in the extension plate 521 and opposite to the air outlet 5211. The top of the adjusting plate 522 is spaced from the inner bottom of the extension plate 521 to avoid structural interference between the adjusting plate 522 and the extension plate 521 during rotation. The air outlet 5211 and the adjusting plate 522 are arranged along the length direction of the extension plate 521. The adjusting plate 522 is arranged in the extension plate 521 to shield the air outlet 5211. The adjusting piece 523 is arranged along the length direction of the adjusting plate 522. The adjusting piece 523 at each end comprises an adjusting rack 5231 and an adjusting gear 5232 which are engaged with each other. The adjusting gear 5232 is rotatably arranged below the extension plate 521 and fixedly connected with the adjusting plate 522. The adjusting rack 5231 is vertically fixed on the shielding table top 42 and the length of the adjusting rack 5231 is less than the height of the shielding table top 42. A spacing groove is arranged on the limiting table top corresponding to the adjusting gear 5232 to avoid structural interference between the shielding table top 42 and the adjusting gear 5232 during lifting of the limiting table top, thereby affecting the operation of the adjusting plate 522. The adjusting piece 523 moves with the shielding table top 42 to control the size of the adjusting plate 522 shielding the air outlet 5211, thereby realizing adjustment of the air outlet size.

[0038] As shown in Figure 2 and Figure 3 , the inclination angle of the operation window 3 and the front side of the cabinet frame 1 is 8°-10°, which is suitable for the observation angle of the human body and convenient for test operation. The operation window 3 is inclined towards the inner side of the cabinet frame 1. The operation window 3 is connected with a traction structure 7 and a falling prevention assembly 8. The operation window 3 comprises a window frame 31 and two layers of parallel perspective windows 32. The window frame 31 is wrapped around the two layers of perspective windows 32. The window frame 31 is slidingly arranged in a sliding rail 11 which is also vertically and obliquely arranged at the front side of the cabinet frame 1. A pushing groove is formed at the bottom of the front side of the window frame 31 along the length direction of the window frame 31. The traction structure 7 realizes the up-down sliding operation of the operation window 3. The pushing groove facilitates the control of the operation window 3 by the human hand. The sliding rail 11 limits the operation window 3 to ensure that the operation window 3 is always at a stable inclination angle.

[0039] As shown in Figure 2 , Figure 3 and Figure 4As shown, the window frame 31 extends with traction blocks 311 at both ends of the top, which are connected with the traction structure 7. The traction structure 7 includes two traction ropes 71, a counterweight 72, and two groups of traction wheel sets 73. Each traction rope 71 is fixed at one end of the traction block 311 at one end and at the other end of the counterweight 72 opposite to the corresponding traction block 311. The two groups of traction wheel sets 73 are respectively arranged at both sides of the cabinet frame 1 near the top and correspond to the window frame 31. The traction rope 71 is fixed on the counterweight 72 through the corresponding traction wheel set 73 at each side. Each group of traction wheel sets 73 includes a first wheel set 731 and a second guide wheel 732. The first wheel set 731 is arranged at one side near the sliding rail 11, and the second guide wheel 732 is arranged at the top of the cabinet frame 1 near the rear side. The counterweight 72 is slidingly arranged in the rear side of the cabinet frame 1. The traction block 311 cooperates with the window frame 31 to realize the traction action of the operation window 3. The traction rope 71 connects the counterweight 72 and the operation window 3 to balance them and adjust the size of the opened operation window 3 under the action of external force to realize the basic function of the fume hood. The traction wheel sets 73 are all fixed pulleys, which change the direction of the force on the traction rope 71 to balance the counterweight 72 and the operation window 3 on both sides.

[0040] The first wheel set 731 includes two first guide wheels 7311 and second guide wheels 7312 arranged in parallel and side by side. A gap is left between the first guide wheels 7311 and the second guide wheels 7312, and a touch wheel 74 is arranged below the first guide wheels 7311 and the second guide wheels 7312 with an axis parallel to the first guide wheels 7311 and the second guide wheels 7312. The touch wheel 74 is also vertically slidingly arranged on the side wall of the cabinet frame 1. The traction rope 71 is sequentially arranged around the first guide wheels 7311, the touch wheel 74, the second guide wheels 7312, and the second guide wheels 732 and fixed at the end of the counterweight 72. The touch wheel 74 is provided with a touch piece 75 connected with the anti-falling assembly 8. The touch wheel 74 is connected with the touch piece 75 to finally realize the connection with the anti-falling assembly 8, realize the emergency anti-falling operation in the case of breaking of the traction rope 71, and ensure the safety of the fume hood.

[0041] As Figure 3 and Figure 4As shown, the trigger member 75 includes a trigger rack 751, a trigger gear 752 and a trigger rod 753, the trigger rack 751 is fixed with the axis of the trigger wheel 74 and is arranged in mesh with the trigger gear 752, the trigger gear 752 is arranged in parallel with the axis of the trigger wheel 74 and is arranged at one side of the trigger rack 751 close to the sliding rail 11, one end of the trigger rod 753 is rotatably installed at the side of the trigger gear 752 and the other end is connected with the anti-falling assembly 8. After the traction rope 71 is broken, the trigger gear 752 loses the vertical upward traction of the traction rope 71 and freely falls under the action of gravity, drives the trigger rack 751 to slide downward and meshes with the trigger gear 752 to drive the trigger gear 752 to rotate clockwise, the trigger gear 752 disengages the trigger rod 753 from the anti-falling assembly 8, thereby realizing the linkage operation of the anti-falling assembly 8, facilitating the subsequent cooperation of the anti-falling assembly 8 with the falling operation window 3.

[0042] The anti-falling assembly 8 includes an anti-falling clamp 81 and a plurality of anti-falling teeth 82, the bottom of the anti-falling clamp 81 is provided with two inclined landslides, the anti-falling clamp 81 is arranged in parallel with the sliding rail 11 and is slidably arranged in the cabinet frame 1, the cabinet frame 1 is provided with a limiting slide 12 corresponding to the anti-falling clamp 81, the limiting slide 12 is provided with corresponding inclined grooves corresponding to the two landslides at the bottom of the anti-falling clamp 81, and the bottom of the limiting slide 12 is further provided with a vertical anti-falling clamp 81 slot that is just clamped with the anti-falling clamp 81 below to limit, so as to reduce the anti-falling clamp 81 from being pressed to be inclined to the limiting slide 12, causing the anti-falling teeth 82 to be too short in extension distance and affecting the anti-falling function, even if there is an inclination of the anti-falling clamp 81, the inclination angle of the anti-falling clamp 81 can be limited to avoid the anti-falling teeth 82 on the anti-falling clamp 81 from being completely retracted.

[0043] The limiting slide 12 is provided with a clamping groove 111 corresponding to the trigger rod 753, the size of the clamping groove 111 is not less than the size of the end of the trigger rod 753, the anti-falling teeth 82 are arranged in an array along the length direction of the anti-falling clamp 81 and are clamped with the sliding rail 11, the sliding rail 11 is provided with a clamping groove 112 corresponding to the anti-falling teeth 82, the shape of the clamping groove 112 is larger than the shape of the anti-falling teeth 82, and the size of the clamping groove 112 is larger than the size of the anti-falling teeth 82, so as to facilitate the sliding and extension of the anti-falling teeth 82. The window frame 31 is further extended with a plurality of clamping teeth 312 at the side close to the anti-falling teeth 82, and the clamping teeth 312 are arranged along the height direction of the window frame 31. After the trigger rod 753 is disengaged from the clamping groove 111, the anti-falling clamp 81 slides down under the action of gravity and the anti-falling teeth 82 extend out of the clamping groove 112, the clamping teeth 312 are engaged and buckled with the anti-falling teeth 82 to clamp the operation window 3, thereby realizing the anti-falling function to avoid the falling of the operation window 3 and causing injury.

[0044] As shown in FIG. 1, the cabinet frame 1 is provided with a sliding rail 11, the sliding rail 11 is arranged in parallel with the cabinet frame 1 and is slidably arranged in the cabinet frame 1, the sliding rail 11 is provided with a plurality of anti-falling teeth 82 arranged in an array along the length direction of the sliding rail 11, the sliding rail 11 is provided with a clamping groove 112 corresponding to the anti-falling teeth 82, the shape of the clamping groove 112 is larger than the shape of the anti-falling teeth 82, and the size of the clamping groove 112 is larger than the size of the anti-falling teeth 82, so as to facilitate the sliding and extension of the anti-falling teeth 82. Figure 2 , Figure 3 and Figure 5As shown, the drainage member 611 includes a drainage basin 6111, a drainage pipe 6112 and a support frame 6113, the drainage pipe 6112 is connected to the bottom of the drainage basin 6111, the other end of the drainage pipe 6112 extends out of the cabinet frame 1, the support frame 6113 is installed on one side of the cabinet frame 1 and is clamped with the drainage pipe 6112, the top of the support frame 6113 and the corresponding position of the cabinet frame 1 are provided with abutting plates 6114, and the abutting plates 6114 are arranged below the operation table 4. The drainage member 611 is arranged corresponding to the water feeding member 21, the drainage basin 6111 receives waste liquid and sends it out of the fume hood through the drainage pipe 6112, and the support frame 6113 fixes the drainage pipe 6112; the abutting plates 6114 are arranged on the top of the support frame 6113 and in the cabinet frame 1 and correspond to the operation table 4, and abut against the operation table 4 to support the operation table 4 when the operation table 4 is not raised.

[0045] The working principle and use method of the fume hood convenient to maintain and adjust are as follows: the operation window 3 is lifted and lowered by the traction structure 7 and is manually controlled to open and close, the operation table 4 can be controlled to be lifted and lowered in height by the lifting member 612, and the size of the control adjusting plate 522 shielding the air outlet 5211 is driven to change when the operation table 4 moves, so that the air outlet size is adjusted; the operation window 3 is connected with the anti-falling assembly 8 to avoid falling and hurting people, in the case that the traction rope 71 suddenly breaks, the touch gear 752 freely falls and drives the touch rack 751 to slide downward, the touch rack 751 meshes with the touch gear 752 to drive the touch gear 752 to rotate clockwise, the touch rod 753 on the touch gear 752 is separated from the anti-falling assembly 8, after the touch rod 753 is separated from the clamping groove 111, the anti-falling clamping 81 slides down under the action of gravity and the anti-falling teeth 82 extend out of the clamping groove 112, the clamping teeth 312 mesh with the anti-falling teeth 82 to buckle and clamp the operation window 3, so that the anti-falling function is realized.

[0046] The above description shows and describes the preferred embodiments of the present application, as previously described, it should be understood that the present application is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the inventive concept described herein by the above teaching or related art or knowledge. The modifications and changes made by those skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the appended claims of the present application.

Claims

1. A fume hood that facilitates maintenance adjustments, characterized in that, It includes a cabinet frame (1), an operating cabinet (2) and a storage cabinet (6). The cabinet frame (1) is a vertical cuboid with an opening on the front. The operating cabinet (2) and the storage cabinet (6) are both installed inside the cabinet frame (1). The operating cabinet (2) is installed above the storage cabinet (6). A water supply component (21) and an air supply component (22) are arranged side by side near the middle of the operating cabinet (2). A ventilation component (23) is also provided above the operating cabinet (2). The operating cabinet (2) includes an operating window (3), an operating table (4), and a flow guiding component (5). The operating window (3) is tilted and installed at the front side of the cabinet frame (1). A sliding rail (11) is provided on the front side of the cabinet frame (1) corresponding to the operating window (3). The sliding rail (11) is set at opposite ends on the front side of the cabinet frame (1). The operating table (4) is horizontally set and installed in the cabinet frame (1) near the middle. A water receiving groove (411) is opened on the operating table (4) corresponding to the water supply component (21). The flow guiding component (5) is installed in the cabinet frame (1). The storage cabinet (6) includes an intermediate bracket (61) and multiple storage cabinets (62). The intermediate bracket (61) is set on the storage cabinets (62). An operating table (4) is set on the top of the intermediate bracket (61). The intermediate bracket (61) contains a drain component (611) that engages with a water tank (411). The drain component (611) extends from the intermediate bracket (61) to the outside of the cabinet frame (1). The intermediate bracket (61) also contains a lifting component (612) for controlling the raising and lowering of the operating table (4). The storage cabinets (62) are arranged in an array below the intermediate bracket (61).

2. A fume hood with easy maintenance adjustment according to claim 1, characterized in that, The angle between the operation window (3) and the front side of the cabinet frame (1) is 8°-10°. The operation window (3) is tilted towards the inside of the cabinet frame (1). The operation window (3) is connected to a traction structure (7). The operation window (3) is also connected to an anti-fall component (8). The operation window (3) includes a window frame (31) and two parallel viewing windows (32). The window frame (31) covers the two viewing windows (32) around. The window frame (31) is slidably set in a sliding track (11). The sliding track (11) is also vertically tilted at the front side of the cabinet frame (1). The bottom front side of the window frame (31) is provided with a toggle groove along the length of the window frame (31).

3. A fume hood with easy maintenance adjustment according to claim 2, characterized in that, The window frame (31) extends at both ends of the top with a traction block (311) connected with the traction structure (7), the traction structure (7) includes two traction ropes (71), a counterweight (72) and two groups of traction wheel sets (73), one end of each of the traction ropes (71) is fixed on the traction block (311) at one end and the other end is fixed on the counterweight (72) opposite to the corresponding traction block (311), two groups of the traction wheel sets (73) are arranged in the cabinet body frame (1) at both sides near the top and correspond to the window frame (31), the traction ropes (71) are fixed on the counterweight (72) through the corresponding side traction wheel set (73), each group of the traction wheel set (73) includes a first wheel set (731) and a second guide wheel (732), the first wheel set (731) is arranged on the side close to the sliding rail (11), the second guide wheel (732) is arranged in the cabinet body frame (1) at the top close to the back side, and the counterweight (72) is slidingly arranged in the back side of the cabinet body frame (1).

4. A fume hood according to claim 3, wherein, The first wheel set (731) includes two first guide wheels (7311) and second guide wheels (7312) arranged in parallel and side by side, a gap is left between the first guide wheels (7311) and the second guide wheels (7312), and a touch wheel (74) is arranged, the touch wheel (74) is arranged below the first guide wheels (7311) and the second guide wheels (7312) and the axis is parallel to the first guide wheels (7311) and the second guide wheels (7312), the touch wheel (74) is also vertically slidingly arranged on the side wall of the cabinet body frame (1), the traction rope (71) is sequentially wound around the first guide wheels (7311), the touch wheel (74), the second guide wheels (7312) and the second guide wheels (732) and fixed with the end of the counterweight (72), the touch wheel (74) is provided with a touch piece (75) connected with the anti-falling assembly (8).

5. A fume hood according to claim 4, wherein, The touch piece (75) includes a touch rack (751), a touch gear (752) and a touch rod (753), the touch rack (751) is fixed with the axis of the touch wheel (74) and is arranged in mesh with the touch gear (752), the touch gear (752) is arranged in parallel with the axis of the touch wheel (74) and is arranged on the side of the touch rack (751) close to the sliding rail (11), and the touch rod (753) is rotatably mounted on the side of the touch gear (752) at one end and is connected with the anti-falling assembly (8) at the other end.

6. A fume hood with easy maintenance adjustment according to claim 5, characterized in that, The anti-falling assembly (8) comprises an anti-falling clamp (81) and a plurality of anti-falling teeth (82), the anti-falling clamp (81) is arranged in parallel with the sliding rail (11) and is slidingly arranged in the cabinet frame (1), the cabinet frame (1) is provided with a limiting slide (12) corresponding to the anti-falling clamp (81), a clamping groove (111) is formed on the limiting slide (12) corresponding to the actuating rod (753), the size of the clamping groove (111) is not less than the size of the end of the actuating rod (753), the anti-falling teeth (82) are arranged in an array along the length direction of the anti-falling clamp (81) and are clamped with the sliding rail (11), the sliding rail (11) is provided with a clamping groove (112) corresponding to the anti-falling tooth (82), the shape of the clamping groove (112) is larger than the shape of the anti-falling tooth (82), and the window frame (31) further extends a plurality of clamping teeth (312) on the side close to the anti-falling tooth (82).

7. A fume hood with easy maintenance adjustment according to claim 1, wherein, The drainage device (611) comprises a drainage basin (6111), a drainage pipe (6112) and a support frame (6113), the drainage pipe (6112) is connected to the bottom of the drainage basin (6111), the other end of the drainage pipe (6112) extends out of the cabinet frame (1), the support frame (6113) is installed on one side of the cabinet frame (1) and is clamped with the drainage pipe (6112), the top of the support frame (6113) and the cabinet frame (1) are provided with abutting plates (6114) corresponding to the top of the support frame (6113), and the abutting plates (6114) are arranged below the operation table top (4).

8. A fume hood with easy maintenance adjustment according to claim 3, wherein, The operation table top (4) comprises an integrated contact table top (41), a shielding table top (42) and a limiting table top (43) which constitute a broken line type, the shielding table top (42) is arranged perpendicularly to the contact table top (41) and is arranged at the bottom of the front side of the contact table top (41), the limiting table top (43) is arranged perpendicularly to the shielding table top (42) and is parallel to the operation table top (4), the limiting table top (43) is arranged perpendicularly to the bottom of the shielding table top (42), the contact table top (41) is provided with a water receiving groove (411), the bottom of the contact table top (41) is connected with the output shaft of the lifting device (612), and the front side of the shielding table top (42) is provided with a flow guide assembly (5) corresponding thereto.

9. A fume hood with easy maintenance adjustment according to claim 8, characterized in that: The air guiding component (5) comprises an air guiding piece (51) and an air curtain piece (52), the air guiding piece (51) is arranged at the top of the cabinet frame (1) and the rear side of the cabinet frame (1), the air guiding piece (51) comprises an inclined air guiding plate (511) and a straight air guiding plate (512), the straight air guiding plate (512) is fixed on the rear side of the cabinet frame (1) by bolts and has a gap with the inner rear side of the cabinet frame (1), the inclined air guiding plate (511) is arranged obliquely above the straight air guiding plate (512), the top of the inclined air guiding plate (511) is fixed with the middle part of the top of the cabinet frame (1), the bottom of the inclined air guiding plate (511) is fixed with the top of the straight air guiding plate (512), the air curtain piece (52) is arranged beside the operation table top (4) corresponding to the operation window (3), and the air curtain piece (52) is connected with the shielding table top (42).

10. A fume hood with easy maintenance adjustment according to claim 9, characterized in that: The air curtain piece (52) comprises an extension plate (521), an adjusting plate (522) and an adjusting piece (523), the extension plate (521) is arc-shaped and fixed at the front side of the operation table top (4) corresponding to the operation window (3), the inner concave surface of the extension plate (521) faces the operation table top (4), the top of the extension plate (521) is provided with an air outlet (5211), the adjusting plate (522) is rotatably arranged in the extension plate (521) by the adjusting piece (523), and the adjusting plate (522) is arranged opposite to the air outlet (5211), the adjusting piece (523) is arranged in the length direction of the adjusting plate (522) in an array mode, the adjusting piece (523) comprises an adjusting rack (5231) and a plurality of adjusting gears (5232) which are engaged with each other, the adjusting gears (5232) are rotatably arranged below the extension plate (521) and fixedly connected with the adjusting plate (522), and the adjusting rack (5231) is vertically fixed on the shielding table top (42).

Images