A perchloric acid fume hood

Abstract

The present invention discloses a perchloric acid fume hood, which relates to the technical field of fume hoods; in order to solve the problem that it is difficult for existing fume hoods to fully dilute perchloric acid; specifically comprises a second cabinet, the bottom outer wall of the second cabinet is fixedly mounted with a first cabinet, the top outer wall of the second cabinet is fixedly mounted with a gas collecting hood, and the top outer wall of the gas collecting hood is fixedly mounted with an exhaust duct, and the bottom inner wall of the first cabinet is fixedly mounted with a liquid storage box. A perchloric acid fume hood proposed in the present invention is provided with a front baffle, a rotating shaft, a traction rope and a counterweight, and the front baffle is connected to both sides of the second cabinet through a slide rail. During use, a hook is provided at the bottom of one end of the second cabinet, the front baffle is pulled down, and the arc-shaped hook plate is hooked on the hook, and the front baffle performs protective treatment on the experimental operation, thereby ensuring the safety of the experiment and the convenience of operation.

Description

Technical Field

[0001] The present invention relates to the technical field of fume hoods, and in particular to a perchloric acid fume hood. Background Art

[0002] Cabinet exhaust hoods are commonly known as fume hoods, which are similar to closed hoods. Small parts spray paint cabinets and chemical laboratory fume hoods are typical structures of cabinet exhaust hoods. Large room fume hoods have one side completely open, and operators work inside the cabinet. They are mainly used for large-scale painting, powder bagging, etc. The working opening of the fume hood has a great influence on the airflow distribution in the cabinet, and the airflow distribution directly affects the working effect of the cabinet exhaust hood.

[0003] During the laboratory experiment, perchloric acid diffuses into the fume hood with the help of the wind force of the fume hood, and is prone to crystallization in the exhaust duct, affecting the use of the device. At the same time, direct discharge into the air will pollute the atmosphere. Existing fume hoods are all simple filter plates that filter and are directly diluted by simple water spraying, which is difficult to fully solve the above problems. Therefore, it is necessary to design a perchloric acid fume hood to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a perchloric acid fume hood.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A perchloric acid fume hood comprises a second cabinet, the bottom outer wall of the second cabinet is fixedly mounted with the first cabinet, the top outer wall of the second cabinet is fixedly mounted with a gas collecting hood, and the top outer wall of the gas collecting hood is fixedly mounted with an exhaust pipe, the bottom inner wall of the first cabinet is fixedly mounted with a liquid storage box, and the bottom inner wall of the liquid storage box is fixedly mounted with a liquid pump, the outlet end of the liquid pump is fixedly mounted with a water guide pipe, the top outer wall of the water guide pipe is fixedly mounted with atomizing nozzles evenly arranged at equal distances, the bottom outer wall of the gas collecting hood is fixedly mounted with a ventilation pipe, and the atomizing nozzles are located at the bottom of the air collecting hood. Inside the ventilation duct, three equidistantly horizontally arranged fixing seats are fixedly installed on the middle part and the bottom outer wall of one end of the ventilation duct, and the same first guide plate is fixedly installed on the outer wall of one end of the three fixing seats located in the same horizontal plane, and a second inclined guide plate is fixedly installed on the top outer wall of one end of the ventilation duct, and the same operating table is fixedly installed on the bottom inner walls of both sides of the second cabinet, and a water guide hole is opened on one side of the top of the operating table, and a buffer tank is fixedly installed on the outer wall of one side of the bottom of the operating table, and the bottom of the buffer tank is connected to the liquid storage box through a conduit.

[0007] Preferably, the cross section of the ventilation pipe is arranged in a trapezoidal shape, and the top of one end of the ventilation pipe is arranged in an oblique shape.

[0008] Preferably: first support plates are fixedly mounted on both side outer walls of the top of the second cabinet, and clamping plates are fixedly mounted on the top outer walls of the two first support plates, and the two clamping plates are connected to the same rotating shaft via a bearing.

[0009] Preferably: the outer walls on both sides of the circumference of the rotating shaft are wrapped with traction ropes, and the same front baffle is fixedly installed on the outer wall at one end of the two traction ropes, and the outer walls at the other ends of the two traction ropes are fixedly installed with counterweight blocks, and the outer walls on both sides of the front baffle are respectively connected to the outer walls at one end of both sides of the second cabinet through sliding rails.

[0010] Preferably, the outer wall at one end of the front baffle is provided with evenly arranged air guide holes, and the bottom outer wall of the front baffle is fixedly mounted with an arc-shaped hook plate.

[0011] Preferably: sockets are fixedly mounted on the bottom outer walls on both sides of one end of the second cabinet, and a controller is fixedly mounted on the middle outer wall on one side of one end of the second cabinet.

[0012] Preferably, an outer wall at one end of the first cabinet is connected to cabinet doors which are arranged at equal distances via hinges.

[0013] Preferably: faucets are fixedly installed on the middle inner walls on both sides of the second cabinet, a second support plate is fixedly installed on the inner wall of one side of the second cabinet close to below the faucet, and a water cup is placed on the top of the second support plate.

[0014] The beneficial effects of the present invention are:

[0015] 1. A perchloric acid fume hood proposed in the present invention is provided with a liquid storage box, a water pump, a water guide pipe, an atomizing nozzle and a buffer tank. The liquid storage box is filled with alkaline water. The water pump outputs the alkaline solution to the atomizing nozzle in a medium pressure form. After passing through the atomizing nozzle, the alkaline solution is in the form of fine water droplets to mix and contact with the perchloric acid gas to complete a chemical reaction. The setting of the atomizing nozzle can effectively improve the adequacy of the mixing of water droplets and perchloric acid gas. Under the influence of gravity, the product enters the liquid storage box through the buffer tank and is then extracted by the water pump for circulation, thereby achieving an effective water dilution effect on the exhaust gas and improving the purification effect of the ventilation pipe.

[0016] 2. A perchloric acid fume hood proposed in the present invention is provided with a guide plate. The installation position and angle of the guide plate can make the exhaust gas evenly distributed without dead angles. Under standard conditions, the exhaust ratio of the upper and middle and lower air outlets of the guide plate is about 50±10% respectively, so as to ensure that gases of different specific gravities can be effectively discharged. In addition, it has a manual exhaust volume ratio adjustable design, which can increase the exhaust volume of the middle and lower air outlets to meet the needs of different experiments.

[0017] 3. A perchloric acid fume hood proposed in the present invention is provided with a front baffle, a rotating shaft, a traction rope and a counterweight, and the front baffle is connected to both sides of the second cabinet through a slide rail. During use, a hook is provided at the bottom of one end of the second cabinet, the front baffle is pulled down, and the arc-shaped hook plate is hooked on the hook, and the front baffle is used to protect the experimental operation, thereby ensuring the safety of the experiment and the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a perchloric acid fume hood proposed in the present invention;

[0019] Figure 2 It is a partial front structural schematic diagram of a second cabinet of a perchloric acid fume hood proposed in the present invention;

[0020] Figure 3 It is a schematic diagram of a partial side cross-sectional structure of a second cabinet and a first cabinet of a perchloric acid fume hood proposed in the present invention;

[0021] Figure 4 It is a schematic diagram of a partial top view of the operating table of a perchloric acid fume hood proposed in the present invention;

[0022] Figure 5 The diagram is a partial front structural diagram of a second cabinet body and a faucet of a perchloric acid fume hood proposed in the present invention.

[0023] In the figure: 1 first cabinet, 2 second cabinet, 3 air hood, 4 exhaust duct, 5 rotating shaft, 6 clamping plate, 7 first support plate, 8 arc hook plate, 9 controller, 10 socket, 11 operating table, 12 handle, 13 cabinet door, 14 first guide plate, 15 fixing seat, 16 front baffle, 17 air guide hole, 18 water guide pipe, 19 atomizing nozzle, 20 second guide plate, 21 buffer tank, 22 faucet, 23 water pump, 24 water guide hole, 25 second support plate, 26 water cup. DETAILED DESCRIPTION

[0024] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0027] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0028] A perchloric acid fume hood, such as Figure 1-5 As shown, it includes a second cabinet 2, the bottom outer wall of the second cabinet 2 is connected to the first cabinet 1 by bolts, the outer wall of one end of the top of the second cabinet 2 is connected to the air collecting hood 3 by bolts, and the top outer wall of the air collecting hood 3 is connected to the exhaust pipe 4 by bolts, the bottom inner wall of the first cabinet 1 is connected to the liquid storage box by bolts, and the bottom inner wall of the liquid storage box is connected to the liquid pump 23 by bolts, the outlet end of the liquid pump 23 is connected to the water pipe 18 by bolts, the top outer wall of the water pipe is connected to the atomizing nozzles 19 evenly arranged at equal distances by bolts, the bottom outer wall of the air collecting hood 3 is connected to the ventilation pipe by bolts, and the atomizing nozzles 19 are located at Inside the ventilation duct, the middle part and the bottom outer wall of one end of the ventilation duct are connected with three equally spaced horizontally arranged fixing seats by bolts, and the outer walls of one end of the three fixing seats located in the same horizontal plane are connected with the same first guide plate 14 by bolts, the top outer wall of one end of the ventilation duct is connected with an inclined second guide plate 20 by bolts, the bottom inner walls on both sides of the second cabinet 2 are connected with the same operating table 11 by bolts, and a water guide hole 24 is opened on one side of the top of the operating table 11, and the outer wall of one side of the bottom of the operating table 11 is connected with a buffer groove 21 by bolts, and the bottom of the buffer groove 21 is connected to the liquid storage box through a conduit.

[0029] In the present invention, the cross section of the ventilation pipe is set in a trapezoidal shape, and the top of one end of the ventilation pipe is set in an oblique shape, which can effectively improve the convenience of water flow falling and the adequacy of mixing water mist and exhaust gas;

[0030] The outer walls on both sides of the top of the second cabinet 2 are connected to the first support plates 7 by bolts, and the top outer walls of the two first support plates 7 are connected to the clamping plates 6 by bolts, and the same rotating shaft 5 is connected between the two clamping plates 6 by bearings;

[0031] The outer walls on both sides of the circumference of the rotating shaft 5 are wound with traction ropes, and the outer walls at one end of the two traction ropes are connected to the same front baffle 16 by bolts, and the outer walls at the other ends of the two traction ropes are connected to counterweights by bolts, and the outer walls on both sides of the front baffle 16 are connected to the outer walls at one end of both sides of the second cabinet 2 by slide rails respectively;

[0032] The outer wall of one end of the front baffle plate 16 is provided with uniformly arranged air guide holes 17, and the bottom outer wall of the front baffle plate 16 is connected with an arc-shaped hook plate 8 by bolts;

[0033] The bottom outer walls on both sides of one end of the second cabinet 2 are connected to sockets 10 by bolts, and the middle outer wall on one side of one end of the second cabinet 2 is connected to a controller 9 by bolts;

[0034] The outer wall at one end of the first cabinet body 1 is connected to cabinet doors 13 arranged at equal distances via hinges;

[0035] The middle inner walls on both sides of the second cabinet 2 are connected with faucets 22 by bolts, and the inner wall on one side of the second cabinet 2 close to the faucet 22 is connected with a second support plate 25 by bolts, and a water cup 26 is placed on the top of the second support plate 25.

[0036] Working principle: When in use, the liquid storage box needs to be filled with alkaline water (NAOH 50% concentration solution), and pH reagent is used for detection, and the pH value is recorded. Check whether all valves in the circulating water system are in the open state. If there are valves in the circulating system of the water pump 23 that are in the closed state, the water pump 23 shall not be started. When preparing for the perchloric acid experiment in the fume hood, the fume hood needs to have a rated exhaust air volume (the surface average wind speed is between 0.5-0.8m / s, and a handheld anemometer is required for detection). Then turn on the start button of the water pump 23. At this time, the circulating water is evenly distributed in the form of water droplets behind the first guide plate 14. After the perchloric acid experiment in the fume hood has been completed, turn off the water pump 23, and use pH test paper for detection, and record the pH value as a reference value for the next experiment. (When the pH value is below 6, the buffer needs to be replaced).

[0037] The above description is only a preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and the inventive concepts in the present invention within the technical scope disclosed in the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A perchloric acid fume hood, comprising a second cabinet body (2), characterized in that: The first cabinet (1) is fixedly mounted on the bottom outer wall of the second cabinet (2), an air collecting hood (3) is fixedly mounted on the top outer wall of the second cabinet (2), and an exhaust pipe (4) is fixedly mounted on the top outer wall of the air collecting hood (3), a liquid storage box is fixedly mounted on the bottom inner wall of the first cabinet (1), a liquid pump (23) is fixedly mounted on the bottom inner wall of the liquid storage box, a water guide pipe (18) is fixedly mounted on the outlet end of the liquid pump (23), and atomizing nozzles (18) arranged evenly and at equal distances are fixedly mounted on the top outer wall of the water guide pipe. 9), a ventilation pipe is fixedly mounted on the bottom outer wall of the air collecting hood (3), and the atomizing nozzle (19) is located inside the ventilation pipe, three fixed seats arranged horizontally at equal distances are fixedly mounted on the middle part and the bottom outer wall of one end of the ventilation pipe, and the outer walls of one end of the three fixed seats located on the same horizontal plane are fixedly mounted with the same first guide plate (14), the top outer wall of one end of the ventilation pipe is fixedly mounted with an inclined second guide plate (20), and the bottom inner walls of both sides of the second cabinet (2) are fixedly mounted with the same operating table (11 ), and a water guide hole (24) is provided on one side of the top of the operating table (11); a buffer groove (21) is fixedly mounted on the outer wall of one side of the bottom of the operating table (11); the bottom of the buffer groove (21) is connected to the liquid storage box through a conduit; the cross-section of the ventilation pipe is arranged in a trapezoidal shape, and the top of one end of the ventilation pipe is arranged in an oblique shape; first support plates (7) are fixedly mounted on both sides of the outer wall of the top of the second cabinet (2), and clamping plates (6) are fixedly mounted on the top outer walls of the two first support plates (7), and the two clamping plates (6) are connected by an axis. The bearing is connected with a same rotating shaft (5); the outer walls on both sides of the circumference of the rotating shaft (5) are wound with traction ropes, and the outer walls at one end of the two traction ropes are fixedly installed with a same front baffle (16), and the outer walls at the other ends of the two traction ropes are fixedly installed with counterweights, and the outer walls on both sides of the front baffle (16) are respectively connected to the outer walls at one end of the second cabinet (2) through slide rails; the outer wall at one end of the front baffle (16) is provided with evenly arranged air guide holes (17), and the bottom outer wall of the front baffle (16) is fixedly installed with an arc-shaped hook plate (8).

2. A perchloric acid fume hood according to claim 1, characterized in that: Sockets (10) are fixedly mounted on the bottom outer walls on both sides of one end of the second cabinet (2), and a controller (9) is fixedly mounted on the middle outer wall on one side of one end of the second cabinet (2).

3. A perchloric acid fume hood according to claim 1, characterized in that: The outer wall at one end of the first cabinet body (1) is connected to cabinet doors (13) arranged at equal distances via hinges.

4. A perchloric acid fume hood according to claim 1, characterized in that: A faucet (22) is fixedly mounted on the middle inner wall of both sides of the second cabinet (2), a second support plate (25) is fixedly mounted on the inner wall of one side of the second cabinet (2) close to the bottom of the faucet (22), and a water cup (26) is placed on the top of the second support plate (25).

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