An explosion-proof and flammable gas detection fume hood

Abstract

The present invention relates to a detection fume hood for inflammable and explosive gases, which comprises a cabinet body, a closed cover door and an exhaust structure. The closed cover door includes a fixed plate, a sliding plate provided with an operation hole and a telescopic sleeve. The fixed plate is fixedly connected to the cabinet body and is arranged inside the cabinet body. The sliding plate is slidably matched with the fixed plate and is arranged below the fixed plate. The telescopic sleeve is embedded inside the operation hole and is fixedly connected to the inner wall of the operation hole. On the basis of the existing fume hood, a telescopic sleeve and a sliding plate are added. Through the cooperation of the telescopic sleeve and the sliding plate, the fume hood can be closed both in the state where the user is operating and in the state where the user is not operating. When operating inflammable and explosive gases, the direct harm to the user caused by an explosion can also be avoided through the arrangement of the fixed plate and the sliding plate, effectively improving the safety performance of the fume hood.

Description

Technical Field

[0001] The present invention relates to a ventilation cabinet for detecting inflammable and explosive gases. Background Art

[0002] As a device often used in chemical laboratories for experiments, a ventilation cabinet protects the personal safety of operators by exhausting toxic and harmful gases generated during experiments and inspections. In order to improve safety performance, the ventilation cabinets in the prior art usually adopt a lifting type to improve the sealing performance of the ventilation cabinet. However, it is found in actual use that when operating inside the ventilation cabinet, the cabinet door often needs to be opened, which has a risk of leakage of harmful gases. Once some inflammable and explosive gases leak, it will pose a life threat to users. Summary of the Invention

[0003] The purpose of the present invention is to provide a ventilation cabinet for detecting inflammable and explosive gases to solve the problem of insufficient protection of users from inflammable and explosive gases when using a ventilation cabinet in the prior art.

[0004] To achieve the above purpose, the present invention provides a ventilation cabinet for detecting inflammable and explosive gases, which includes a cabinet body, a closed cover door and an exhaust structure. The closed cover door is slidably connected to the cabinet body and is arranged on one side of the cabinet body. The exhaust structure is arranged inside the cabinet body and is slidably matched with the cabinet body. The closed cover door includes a fixed plate, a sliding plate provided with an operation hole and a telescopic sleeve. The fixed plate is fixedly connected to the cabinet body and is arranged inside the cabinet body. The sliding plate is slidably matched with the fixed plate and is arranged below the fixed plate. The operation hole penetrates through the sliding plate. The telescopic sleeve is embedded inside the operation hole and is fixedly connected to the inner wall of the operation hole.

[0005] When detecting the cabinet body, the closed cover door closes the cabinet body to provide a detection space. The exhaust structure discharges inflammable and explosive gases into a predetermined container through negative pressure, thereby reducing the explosion risk. The fixed plate cooperates with the sliding plate. When detecting, the sliding plate can be slid down to close the cabinet body. When detecting, even if an explosion occurs to inflammable and explosive gases, the explosion can be isolated inside the cabinet body, thereby realizing the protection of users. The operation hole allows users to wear protective equipment on their hands and then reach into the cabinet body when they need to operate, which meets both safety needs and operation needs.

[0006] Wherein, the telescopic sleeve includes an installation sleeve, a guide air pipe and a plurality of closed soft sheets. The installation sleeve is fixedly connected to the inner wall of the operation hole. The guide air pipe is buried outside the telescopic sleeve and is communicated with the cabinet body. A plurality of the closed soft sheets are all arranged inside the installation sleeve.

[0007] The installation sleeve is matched with the operation hole. By arranging the air duct and a plurality of the sealing soft sheets, the operation hole can still be sealed when not in operation, so as to avoid leakage of harmful gases. When the user operates through the operation hole, the sealing soft sheets can also surround the user's arm, and the air duct is used to spray out gas to achieve double sealing of harmful gases, that is, to improve the safety of the fume hood.

[0008] Wherein, the installation sleeve has a plurality of exhaust holes and a plurality of docking grooves. The plurality of exhaust holes are arranged in one-to-one correspondence with the plurality of docking grooves, and the plurality of exhaust holes are all communicated with the air duct through the corresponding docking grooves.

[0009] The arrangement of the plurality of exhaust holes can discharge the pressurized gas, so that the inner peripheral side of the installation sleeve can seal the harmful gas in the cabinet body, thereby improving the safety performance of the fume hood. The arrangement of the plurality of docking grooves is used to cooperate with the air duct, so that the air duct can be stably arranged around the installation sleeve.

[0010] Wherein, the fixing plate includes a flow guide plate and a makeup air plate. The flow guide plate is arranged on the upper side of the cabinet body and is fixedly connected to the cabinet body. The makeup air plate is arranged on the upper side of the flow guide plate, and the makeup air plate connects the flow guide plate and the cabinet body.

[0011] The flow guide plate is used to guide the movement direction of the gas discharged by the exhaust structure, and the makeup air plate is used to supply gas into the cabinet body when the exhaust structure is not in use, so that the negative pressure member can continuously absorb the generated harmful gas. The makeup air plate can be manually controlled to open and close.

[0012] Wherein, the flow guide plate is provided with a receiving cavity and a sliding track. The receiving cavity is arranged inside the flow guide plate and fits with the sliding plate. The sliding track is arranged inside the flow guide plate, and the sliding track is in sliding fit with the sliding plate. [[ID=I9]]

[0013] The receiving cavity is used to receive the sliding plate. Through the arrangement of the receiving cavity, when the sliding plate is in the open state, it can be stored in the receiving cavity. The sliding track cooperates with the sliding plate to limit the moving direction of the sliding plate. At the same time, the sliding track also has a certain effect of stabilizing the movement process of the sliding plate, so that the sliding plate can stably cooperate with the fixing plate.

[0014] Among them, the sliding plate is provided with a docking protrusion and air guide holes. The docking protrusion is arranged on the upper side of the sliding plate and fits with the sliding track. The air guide holes are arranged on both sides of the sliding plate and penetrate through the sliding plate. The air guide holes communicate the telescopic sleeve and the cabinet body.

[0015] The docking protrusion is used to cooperate with the sliding track, so that the sliding plate cooperates with the sliding track through the docking protrusion. Furthermore, during the movement of the sliding plate, a relatively stable relative movement can be carried out with the sliding track. The air guide holes are used to place the air guide pipes. By using the air guide holes to place the air guide pipes, when the sliding plate is in a closed state, it can be communicated with the cabinet body through the air guide pipes, so that the installation sleeve can exhaust air, thus meeting the closing requirements of the fume hood.

[0016] An inflammable and explosive gas detection fume hood of the present invention improves the structure of the fume hood. On the basis of the existing fume hood, the telescopic sleeve and the sliding plate are added. Through the cooperation of the telescopic sleeve and the sliding plate, the fume hood can be closed both in the user operation state and the non-operation state. When operating inflammable and explosive gases, the direct harm to the user can also be avoided through the settings of the fixed plate and the sliding plate, effectively improving the safety performance of the fume hood. Brief Description of the Drawings

[0017] Figure 1 is an axonometric structural schematic diagram of an inflammable and explosive gas detection fume hood provided by the present invention.

[0018] Figure 2 is a sectional structural schematic diagram of an inflammable and explosive gas detection fume hood provided by the present invention.

[0019] Figure 3 is a front view structural schematic diagram of an inflammable and explosive gas detection fume hood provided by the present invention without a closed cover door.

[0020] Figure 4 is an axonometric structural schematic diagram of a sliding plate of an inflammable and explosive gas detection fume hood provided by the present invention.

[0021] Figure 5 is a sectional structural schematic diagram of a sliding plate of an inflammable and explosive gas detection fume hood provided by the present invention.

[0022] Figure 6 is an axonometric structural schematic diagram of a telescopic sleeve of an inflammable and explosive gas detection fume hood provided by the present invention.

[0023] Figure 7The present invention provides a schematic diagram of the axonometric structure of a top air curtain and an adjustment frame of a flammable and explosive gas inspection fume hood.

[0024] 1-cabinet, 2-closed cover door, 3-exhaust structure, 4-fixed plate, 5-sliding plate, 6-telescopic sleeve, 7-negative pressure piece, 8-top air curtain, 9-adjusting frame, 10-guide plate, 11-air supply plate, 12-operating hole, 13-docking protrusion, 14-air guide hole, 15-installation sleeve, 16-air guide pipe, 17-closed soft film, 18-conical body, 19-negative pressure suction port, 20-fixed bracket, 21-pulley, 22-accommodating chamber, 23-sliding rail, 24-exhaust hole, 25-docking groove. DETAILED DESCRIPTION

[0025] See also Figures 1 to 7 The present invention provides a fume hood for testing flammable and explosive gases, which comprises a cabinet body 1, a closed cover door 2, and an exhaust structure 3. The closed cover door 2 is slidably connected to the cabinet body 1 and is arranged on one side of the cabinet body 1. The exhaust structure 3 is arranged on the inner side of the cabinet body 1 and slides with the cabinet body 1. The closed cover door 2 comprises a fixed plate 4, a sliding plate 5 provided with an operating hole 12, and a telescopic sleeve 6. The fixed plate 4 is fixedly connected to the cabinet body 1 and is arranged inside the cabinet body 1. The sliding plate 5 is slidably matched with the fixed plate 4 and is arranged on the lower side of the fixed plate 4. The operating hole 12 passes through the sliding plate 5. The telescopic sleeve 6 is embedded in the inner side of the operating hole 12 and is fixedly connected to the inner wall of the operating hole 12.

[0026] In this embodiment, the cabinet 1 is inspected, and the closed cover door 2 closes the cabinet 1 to provide an inspection space. The exhaust structure 3 discharges the flammable and explosive gases into a predetermined container through negative pressure, thereby reducing the risk of explosion. The fixed plate 4 cooperates with the sliding plate 5. When conducting an inspection, the sliding plate 5 is slid down to close the cabinet 1. During the inspection, even if the flammable and explosive gases explode, the explosion can be isolated on the inside of the cabinet 1, thereby protecting the user. The operating hole 12 allows the user to wear protective equipment on their hands when operation is required, and then go deep into the cabinet 1 to perform the operation, which meets both safety needs and operational needs.

[0027] The telescopic sleeve 6 includes a mounting sleeve 15, an air duct 16 and a plurality of closed soft films 17. The mounting sleeve 15 is fixedly connected to the inner wall of the operating hole 12. The air duct 16 is buried on the outside of the telescopic sleeve 6 and is connected to the cabinet 1. The plurality of closed soft films 17 are all arranged on the inner side of the mounting sleeve 15.

[0028] In this embodiment, the mounting sleeve 15 cooperates with the operation hole 12. By providing the air duct 16 and a plurality of the sealing flexible sheets 17, the operation hole 12 can still be sealed when not in operation, so as to avoid the leakage of harmful gases. When the user operates through the operation hole 12, the sealing flexible sheets 17 can also surround the user's arm, and the air duct 16 is assisted to eject gas, so as to achieve double sealing of harmful gases, that is, to improve the safety of the fume hood. The sealing flexible sheets 17 also have a certain function of guiding the air flow direction of the air duct 16.

[0029] The mounting sleeve 15 has a plurality of exhaust holes 24 and a plurality of docking grooves 25. The plurality of exhaust holes 24 are arranged in one-to-one correspondence with the plurality of docking grooves 25, and the plurality of exhaust holes 24 are all communicated with the air duct 16 through the corresponding docking grooves 25.

[0030] In this embodiment, the arrangement of the plurality of exhaust holes 24 discharges the pressure gas, so that the inner peripheral side of the mounting sleeve 15 can seal the harmful gases in the cabinet body 1, and further improves the safety performance of the fume hood. The arrangement of the plurality of docking grooves 25 is used to cooperate with the air duct 16, so that the air duct 16 can be stably arranged around the mounting sleeve 15.

[0031] The fixing plate 4 includes a flow guiding plate 10 and a makeup air plate 11. The flow guiding plate 10 is arranged on the upper side of the cabinet body 1 and is fixedly connected to the cabinet body 1. The makeup air plate 11 is arranged on the upper side of the flow guiding plate 10, and the makeup air plate 11 connects the flow guiding plate 10 and the cabinet body 1.

[0032] In this embodiment, the flow guiding plate 10 is used to guide the movement direction of the gas discharged by the exhaust structure 3, and the makeup air plate 11 is used to supplement gas into the cabinet body 1 when the exhaust structure 3 is out of use, so that the negative pressure member 7 can continuously absorb the generated harmful gases. The makeup air plate 11 can be manually controlled to open and close.

[0033] The flow guiding plate 10 is provided with a receiving cavity 22 and a sliding track 23. The receiving cavity 22 is arranged inside the flow guiding plate 10 and fits with the sliding plate 5. The sliding track 23 is arranged inside the flow guiding plate 10, and the sliding track 23 is in sliding fit with the sliding plate 5.

[0034] In this embodiment, the receiving cavity 22 is used to receive the sliding plate 5. Through the arrangement of the receiving cavity 22, when the sliding plate 5 is in the open state, it can be stored in the receiving cavity 22. The sliding track 23 cooperates with the sliding plate 5 to define the moving direction of the sliding plate 5. At the same time, the sliding track 23 also has a certain effect of stabilizing the movement process of the sliding plate 5, so that the sliding plate 5 can stably cooperate with the fixed plate 4.

[0035] The sliding plate 5 is provided with a docking protrusion 13 and air guide holes 14. The docking protrusion 13 is arranged on the upper side of the sliding plate 5 and fits with the sliding track 23. The air guide holes 14 are arranged on both sides of the sliding plate 5 and penetrate through the sliding plate 5. The air guide holes 14 communicate the telescopic sleeve 6 and the cabinet body 1.

[0036] In this embodiment, the docking protrusion 13 is used to cooperate with the sliding track 23, so that the sliding plate 5 cooperates with the sliding track 23 through the docking protrusion 13. Furthermore, during the movement of the sliding plate 5, a relatively stable relative movement can be carried out with the sliding track 23. The air guide holes 14 are used to place the air guide pipe 16. By using the air guide holes 14 to place the air guide pipe 16, when the sliding plate 5 is in the closed state, it can be communicated with the cabinet body 1 through the air guide pipe 16, so that the installation sleeve 15 can exhaust gas, thus meeting the closing requirements of the fume hood.

[0037] The exhaust structure 3 includes a negative pressure member 7, a top air curtain 8 and an adjustment frame 9. The adjustment frame 9 connects the top air curtain 8 and the inner top of the cabinet body 1 and is slidably matched with the cabinet body 1. The negative pressure member 7 is arranged inside the cabinet body 1 to provide negative pressure.

[0038] In this embodiment, the negative pressure member 7 provides negative pressure into the cabinet body 1, so that the generated harmful gases can be discharged into a specific container through the negative pressure member 7. The top air curtain 8 further improves the sealing performance of the cabinet body 1 for harmful gases. By connecting an external fan to the top air curtain 8, the top air curtain 8 discharges pressurized gas downward, so as to confine the harmful gases inside the top air curtain 8. Even if the user's hand passes through the air curtain and a small amount of harmful gases can pass through the air curtain, the telescopic sleeve 6 can still be used to seal the harmful gases, thus improving the safety performance of the fume hood in multiple aspects. The adjustment frame 9 is used to adjust the height of the top air curtain 8. Through the cooperation of the adjustment frame 9 and the cabinet body 1, the top air curtain 8 can be adjusted in height according to needs to meet the requirements of different harmful gases for the sealing performance.

[0039] The adjustment frame 9 includes a fixed bracket 20 and pulleys 21. The pulleys 21 are arranged on both sides of the fixed bracket 20 and are slidably connected to the inner side of the cabinet body 1. The fixed bracket 20 is fixedly connected to the top air curtain 8.

[0040] In this embodiment, the fixed bracket 20 is used to install the top air curtain 8 so that the top air curtain 8 and the fixed bracket 20 can maintain a stable relative position relationship. The pulleys 21 are arranged on both sides of the fixed bracket 20, enabling the fixed bracket 20 to be height-adjusted within the cabinet body 1, thereby realizing the height adjustment of the top air curtain 8. The negative pressure member 7 has a conical body 18 and a negative pressure suction port 19. The conical body 18 is externally connected to an air pump, and the negative pressure suction port 19 is arranged on both sides of the conical body 18 to penetrate the conical body 18 and communicate with the externally connected air pump.

[0041] In this embodiment, the setting of the conical body 18 is used to enhance the absorption capacity of the negative pressure member 7 for harmful gases. By setting it as the conical body 18, the contact degree between the negative pressure suction port 19 and the harmful gases is improved. Furthermore, on the basis of being enclosed, the harmful gases can be more fully inhaled into the conical body 18 and sent to a predetermined container, thereby enhancing the safety performance of the fume hood.

[0042] The explosion-proof and flammable gas detection fume hood of the present invention improves the structure of the fume hood. On the basis of the existing fume hood, the telescopic sleeve 6 and the sliding plate 5 are added. Through the cooperation of the telescopic sleeve 6 and the sliding plate 5, the fume hood can be closed both in the user operation state and the non-operation state. When operating flammable and explosive gases, the direct harm to the user can also be avoided through the setting of the fixed plate 4 and the sliding plate 5, effectively enhancing the safety performance of the fume hood.

Claims

1. An inflammable and explosive gas detection fume hood, characterized in that the inflammable and explosive gas detection fume hood comprises a cabinet body, a closed cover door and an exhaust structure, the closed cover door is slidably connected to the cabinet body and is arranged on one side of the cabinet body, and the exhaust structure is arranged inside the cabinet body and is slidably matched with the cabinet body; the closed cover door comprises a fixing plate, a sliding plate provided with an operation hole and a telescopic sleeve, the fixing plate is fixedly connected to the cabinet body and is arranged inside the cabinet body, the sliding plate is slidably matched with the fixing plate and is arranged below the fixing plate, the operation hole penetrates through the sliding plate, and the telescopic sleeve is embedded inside the operation hole and is fixedly connected to the inner wall of the operation hole; the telescopic sleeve comprises an installation sleeve, a guide air pipe and a plurality of closed soft sheets, the installation sleeve is fixedly connected to the inner wall of the operation hole, the guide air pipe is buried outside the telescopic sleeve and is communicated with the cabinet body, and a plurality of the closed soft sheets are all arranged inside the installation sleeve; the installation sleeve has a plurality of exhaust holes and a plurality of docking grooves, the plurality of exhaust holes are arranged in one-to-one correspondence with the plurality of docking grooves, and the plurality of exhaust holes are all communicated with the guide air pipe through the corresponding docking grooves.

2. The inflammable and explosive gas detection fume hood according to claim 1, characterized in that the fixing plate comprises a diversion plate and a supplementary air plate, the diversion plate is arranged on the upper side of the cabinet body and is fixedly connected to the cabinet body, the supplementary air plate is arranged on the upper side of the diversion plate, and the supplementary air plate connects the diversion plate and the cabinet body.

3. The inflammable and explosive gas detection fume hood according to claim 2, characterized in that the diversion plate is provided with a receiving cavity and a sliding track, the receiving cavity is arranged inside the diversion plate and is fitted with the sliding plate, and the sliding track is arranged inside the diversion plate and is slidably matched with the sliding plate.

4. The inflammable and explosive gas detection fume hood according to claim 3, characterized in that the sliding plate is provided with a docking protrusion and a guide air hole, the docking protrusion is arranged on the upper side of the sliding plate and is fitted with the sliding track, the guide air hole is arranged on both sides of the sliding plate and penetrates through the sliding plate, and the guide air hole communicates the telescopic sleeve and the cabinet body.

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