CN114308968B - Low-noise automatic ventilation cleaning device for chemical laboratory of harmful gas - Google Patents

Abstract

The invention discloses a low-noise automatic ventilation cleaning device for a harmful gas chemical laboratory, which belongs to the technical field of laboratory ventilation equipment and comprises: the acid-base neutralization device comprises a corrugated pipe, an activated carbon filter and an acid-base neutralization device, wherein the activated carbon filter is connected with one end of the corrugated pipe in a flange mode, the acid-base neutralization device is connected with the activated carbon filter in a flange mode, an acid gas path channel and an alkaline gas path channel with nozzles are arranged inside the acid-base neutralization device respectively, the acid gas path channel and the alkaline gas path channel can extend the circumferential rotation of the acid-base neutralization device, when acid gas is detected inside the acid-base neutralization device, the alkaline gas path channel releases alkaline gas through the nozzles to neutralize the acid gas, and vice versa. The invention can perform harmless treatment on acidic or alkaline harmful gas, prevents the harmful gas from being discharged out of a laboratory to further pollute the environment, realizes ventilation and cleanness of a chemical laboratory, and has high automation degree and small noise pollution.

Description

Low-noise automatic ventilation cleaning device for chemical laboratory of harmful gas

Technical Field

The invention relates to the technical field of laboratory ventilation equipment, in particular to a low-noise automatic ventilation cleaning device for a harmful gas chemical laboratory.

Background

Chemical laboratories are often used in colleges and universities or scientific research institutions to prepare chemical reagents, and during the preparation of chemical reagents, due to chemical reactions of various reagents, toxic and harmful gases are often generated, and common harmful gases can be classified into acidic harmful gases and alkaline harmful gases according to the degree of acidity and alkalinity. In order to reduce the harm of the poisonous and harmful gas in the laboratory to the operators, the ventilation equipment in the laboratory is inevitably opened to carry out effective internal and external gas exchange in the experimental process, and the poisonous and harmful gas is required to be pretreated before the gas exchange, so that the harmful gas is replaced into harmless gas to be discharged out of the laboratory, and the pollution to the environment is avoided.

The existing laboratory ventilation equipment is generally divided into indoor equipment and outdoor equipment, wherein the indoor equipment is connected with a gas-collecting hood, and generally adopts an active carbon absorption device to adsorb harmful gas particles or adopts a nano-filtration technology to filter the harmful gas particles, and the outdoor equipment is generally a large-scale air suction pump. The principle is that harmful gas harmless treatment is realized through a harmful gas adsorption or nano filtration mode. However, the method for adsorbing harmful gases by using activated carbon cannot effectively adsorb acidic or alkaline gases, and the nano-filtration technology is often complex to operate and the harmful acidic or alkaline gases easily corrode the nano-filtration equipment, so that the nano-filtration equipment is damaged, and the experiment cost is increased. Therefore, a new ventilation cleaning device for harmful gas chemical laboratory is urgently needed.

Disclosure of Invention

Aiming at the problems, the invention provides a low-noise automatic ventilation cleaning device for a harmful gas chemical laboratory, which can perform harmless treatment on acidic or alkaline harmful gas and prevent the harmful gas from being discharged out of the laboratory to further pollute the environment.

The invention provides a low-noise automatic ventilation cleaning device for a harmful gas chemical laboratory, which is arranged at a ventilation port of the chemical laboratory and comprises: the acid-base neutralizer comprises a first shell with two symmetrical extension ends, the extension ends are communicated with the inside of the first shell, sound-absorbing sponge is wrapped outside the first shell, one extension end is connected with the flange of the activated carbon filter, a controller is arranged at the top of the first shell and is rotationally connected with a rotating shaft, the rotating shaft is vertically inserted into the first shell, a rotating body is sleeved on the rotating shaft in the first shell, two rows of mutually symmetrical gas path channels are pre-embedded on the rotating body along the axial direction, one row is an acidic gas path channel, one row is a basic gas path channel, a plurality of spray heads are distributed on the gas path channel, a gas containing box penetrated through by the rotating shaft is arranged at the top of the rotating body, and the gas containing box comprises an acidic gas containing cavity and a basic gas containing cavity, the acid gas containing cavity is internally provided with a control valve A, the alkaline gas containing cavity is internally provided with a control valve B, the acid containing cavity is communicated with an acid gas path channel through the control valve A, the alkaline gas containing cavity is communicated with an alkaline gas path channel through the control valve B, at least two acid-base detectors are symmetrically arranged on the inner wall of the first shell, a main control circuit board is arranged in the controller, a central processing unit, a memory, a first driving motor and a first storage battery are welded on the main control circuit board in a circuit mode, the central processing unit is respectively connected with the acid-base detectors, the memory, the first driving motor, the first storage battery, the control valve A and the control valve B in a circuit mode, the first driving motor is meshed with the rotating shaft gear, the first driving motor starts to work when the central processing unit is started, the acid-base detectors collect the acid-base value of the gas in the first shell and transmit information to the central processing unit, when the gas in the first shell is the acid gas, the central processing unit controls the control valve B to be opened, the alkaline gas is sprayed out in a rotating mode to be mixed with the gas in the first shell, when the gas in the first shell is the alkaline gas, the central processing unit controls the control valve A to be opened, the acid gas is sprayed out in a rotating mode to be mixed with the gas in the first shell, and the other extending end of the acid-base neutralizer is connected with the air pump through a flange.

Furthermore, the rotating body comprises four blades which are uniformly distributed along the circumferential direction, xenon lamps are arranged on the two blades which are symmetrical to each other, a spray head is arranged on the blade which is adjacent to the xenon lamps, the xenon lamps are electrically connected with a controller, and when the controller is started, the xenon lamps are electrified and lightened. The blade can carry out intensive mixing with the mist in the first casing for acid gas molecule granule and alkaline gas molecule granule are with fast, and the xenon lamp can kill bacterium and the virus of the first casing of laboratory flow through as far as, prevents that harmful bacterium and virus in the laboratory from flowing out, polluted environment.

Further, still include intermittent type adjusting device, intermittent type adjusting device includes second casing and adjustment subassembly, outside second casing parcel adjustment subassembly and adjustment subassembly's both ends extended the second casing, an extension end and active carbon filter fixed connection of adjustment subassembly, the inside intermittent type adjusting valve that can horizontal reciprocating motion that is provided with of adjustment subassembly, for the adjustment passes through gaseous amount of wind, make the gas that is located intermittent type adjusting valve both ends form the pressure differential and intermittent type to the one end air feed of keeping away from active carbon filter, install between second casing and the adjustment subassembly and inhale the sound sponge. Wherein, inhale the noise that sound sponge can absorb intermittent type adjusting device produced, the noise reduction is to laboratory operation personnel's influence.

Further, the adjustment assembly includes: the third shell is of a bilateral symmetry structure, two ends of the third shell extend out of the second shell, and one extending end of the third shell is connected with an activated carbon filter pipeline; the driving piece is fixedly connected to the outer surface of the second shell; the transmission piece is hung at one end inside the third shell, one end of the transmission piece penetrates out of the third shell and the second shell and is tightly connected with the transmission piece, the transmission piece can be driven by the transmission piece to move up and down along the vertical direction, the other end of the transmission piece is fixedly connected with a transverse connecting piece, the transverse connecting piece is fixedly connected with the intermittent adjusting valve in the third shell through a small caliber, and the diameter of the intermittent adjusting valve is larger than the diameter of the middle part of the third shell; the two supporting pieces are respectively positioned at two ends of the transverse connecting piece and are in sliding connection with the transverse connecting piece, and the two supporting pieces are respectively fixedly connected with the inner parts of two ends of the third shell and are used for supporting the transverse connecting piece; the elastic reset piece is fixedly connected to the inner wall of one end of the third shell and is elastically connected with one end, pressed by the driving piece, of the driving piece. The aperture of the middle part of the third shell is smaller than the apertures of the two ends, so that the air pressure is gradually increased when the air can flow through a small aperture from a large aperture area, the passing speed of the air is increased, the transmission part is driven by the driving part to drive the transverse connecting part and the intermittent adjusting valve to transversely reciprocate intermittently under the auxiliary action of the elastic resetting part, the transverse reciprocating intermittent motion is matched with the middle part of the third shell with a small aperture, the air flowing through is enabled to intermittently and non-uniformly flow into the acid-base neutralizer, the air neutralization time is increased by being matched with the rotating body in the acid-base neutralizer, and the purpose that the acid-base gas can reach the neutralization is fully ensured.

Furthermore, the driving piece comprises a fourth shell, a second driving motor is fixedly connected inside the fourth shell, a cam is fixedly connected to an output shaft of the second driving motor, the driving piece is inserted into the fourth shell and is tightly pressed with the cam, a second storage battery is connected to the outer wall of the fourth shell in a hanging mode, and the second storage battery is electrically connected with the second driving motor. The second battery supplies power to the second driving motor, and the second driving motor drives the cam to rotate, so that the pressing end of the transmission part can move up and down intermittently in the vertical direction.

Further, the transmission part comprises an integrally formed pressing section, a Z-shaped force transmission section and a linkage section, the top of the pressing section is fixedly connected with a contact ball, the bottom of the pressing section is connected with the Z-shaped force transmission section, one side of the Z-shaped force transmission section is connected with the linkage section, the linkage section is connected with the transverse connecting piece in a sleeved mode, a suspension hole is formed in the Z-shaped force transmission section, a hanging piece is sleeved in the suspension hole, and one end of the hanging piece is fixedly connected with the inner wall of the third shell. The contact ball is in contact with the outer surface of the cam, and can smoothly pass through the protruding part of the cam, so that the mechanical stability is ensured.

Furthermore, a buffer spring is arranged at the sleeve joint of the linkage section and the transverse connecting piece. Because the sleeve joint is not an integrally formed structure, stress concentration is often generated at the sleeve joint, and the abrasion between the transverse connecting piece and the linkage section is increased due to the stress concentration, so that the influence of stress concentration is eliminated by increasing the buffer spring, and the transverse connecting piece is protected.

Furthermore, the elastic reset piece comprises an L supporting plate, one end of the L supporting plate is fixedly connected with the inner wall of the third shell, a sleeve is installed on the plane of the other end of the L supporting plate, the pressing section and the Z-shaped force transmission section are connected and disposed in the sleeve, a reset spring is installed between the joint and the sleeve base, and the sleeve can meet the motion space of the transmission piece. Reset spring guarantees to produce after the driving medium downstream and restores force, and upward movement again behind the help driving medium downstream for the driving medium carries out intermittent type reciprocating motion under the effect of driving piece.

Further, the sleeve is hollow and an integrated structure with a notch is arranged on one side of the outer wall, and the Z-shaped force transmission section can move through the notch.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the acid or alkaline harmful gas in the chemical laboratory is subjected to harmless treatment in a manner that the acid-alkali neutralizer is connected to the rear side of the activated carbon filter through the flange, so that the harmful gas is prevented from being discharged out of the laboratory to further pollute the environment. The bellows, the activated carbon filter and the acid-base neutralizer are all installed inside the laboratory, and one end of the bellows is connected with the gas collecting hood flange and directly exhausts gas to the external environment through the air pump arranged outside the laboratory. And two mutual symmetry gas circuit passageways of being listed as in the acid-base neutralizer break-make acid gas circuit passageway and basicity gas circuit passageway along with the control of controller for acid gas or basicity gas pass through shower nozzle blowout rotor, along with the centrifugal force that the rotor produced, make acid gas or basicity gas to throw around inside first casing, make the inside gas of first casing fully neutralize for neutralization reaction rate. The controller controls the mechanical parts to act to realize automatic operation, and the acid-base detector detects the pH value of gas in the first shell in real time and transmits information to the controller to ensure that the controller can quickly react. The invention can realize the purpose of automatically cleaning harmful gas through the mechanism, realize the ventilation cleaning of a chemical laboratory and has small noise pollution.

Drawings

Fig. 1 is a schematic view of the overall structure of a low-noise automatic ventilation cleaning device for a harmful gas chemical laboratory according to embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of an acid-base neutralizer;

FIG. 3 is a schematic view of a rotor;

FIG. 4 is a schematic view of the structure of the gas containing box;

FIG. 5 is a schematic view of the overall structure of embodiment 2 of the present invention;

FIG. 6 is a schematic view showing the structure of the intermittent adjustment mechanism of FIG. 5;

FIG. 7 is a schematic view of the structure of the driving member of the intermittent adjustment mechanism;

FIG. 8 is a schematic view of an assembly structure of the elastic reset element and the transmission element;

FIG. 9 is a schematic view of the structure of the transmission member;

FIG. 10 is a schematic view of the construction of the sleeve;

FIG. 11 is a schematic view of the support member;

FIG. 12 is a schematic view of the structure of an activated carbon core;

FIG. 13 is an enlarged view ofbase:Sub>A portion of FIG. 1 taken along line A-A;

fig. 14 is a schematic structural diagram of embodiment 3 of the present invention.

Wherein, 1, a corrugated pipe, 2, a hand valve, 3, an activated carbon filter, 4, an intermittent adjusting device, 4-1, a second shell, 4-2, an intermittent adjusting valve, 4-3, a third shell, 4-4, a driving piece, 4-4-1, a fourth shell, 4-4-2, a second driving motor, 4-4-3, a cam, 4-4-4, a second storage battery, 4-5, a driving piece, 4-5-1, a pressing section, 4-5-2, a Z-shaped force transmission section, 4-5-21, a suspension hole, 4-5-3, a linkage section, 4-6, a supporting piece, 4-6-1, a supporting rod, 4-6-2, a sliding shaft seat and 4-7, a transverse connecting piece, 4-8 parts of elastic reset piece, 4-8-1.L supporting plate, 4-8-2 parts of sleeve, 5 parts of stepped sleeve, 6 parts of acid-base neutralizer, 6-1-1 parts of first shell, 6-1-2 parts of acid-base detector, 6-1-3 parts of controller, 6-1-4 parts of rotator, 6-1-5 parts of gas containing box, 6-1-51 parts of acid gas containing cavity, 6-1-52 parts of alkaline gas containing cavity, A6-1-53 parts of control valve, B6-1-54 parts of control valve, 7 parts of air pump, 8 parts of activated carbon core, 9 parts of air outlet, 10 parts of limiting bulge, 11 parts of hanging piece, 12 parts of buffer spring and 13 parts of reset spring.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

In the description of the present invention, it is to be understood that the terms "transverse", "longitudinal", "vertical", "edge", "side end", "upper", "lower", "surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of describing technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Example 1

As shown in fig. 1 and 2, a low-noise automatic ventilation cleaning device for a harmful gas chemical laboratory, which is installed at a vent of a chemical laboratory, includes: the corrugated pipe 1 and the activated carbon filter 3 connected with one end of the corrugated pipe 1 through a flange are arranged, an activated carbon core 8 shown in figure 12 is arranged in the activated carbon filter 3, and a plurality of activated carbon cores 8 are sequentially arrayed in the activated carbon filter 3 along the axial direction; referring to fig. 13, a hand valve 2 is further disposed on the bellows 1, and the gas on-off can be manually controlled by the hand valve 2; the acid-base neutralizer 6 is characterized by also comprising an acid-base neutralizer 6 as shown in fig. 2, wherein the acid-base neutralizer 6 comprises a first shell 6-1-1 with two symmetrical extension ends, the extension ends are communicated with the inside of the first shell 6-1-1, sound-absorbing sponge is wrapped outside the first shell 6-1-1, the sound-absorbing sponge can absorb noise generated by the acid-base neutralizer 6 during working, one of the extension ends is connected with an active carbon filter 3 through a flange, a controller 6-1-3 is arranged at the top of the first shell 6-1-1, the controller 6-1-3 is rotatably connected with a rotating shaft, the rotating shaft is vertically inserted into the first shell 6-1-1, a 6-1-4 is sleeved on the rotating shaft inside the first shell 6-1-1, two rows of mutually symmetrical gas path channels are pre-embedded in the rotating body 6-1-4 in the axial direction, one row is an acidic gas path channel, and the other row is an alkaline gas path channel; referring to fig. 3, a plurality of nozzles 6-1-42 are distributed on the gas path, and the rotating body 6-1-4 can generate centrifugal force along with the rotation of the rotating shaft, and the centrifugal force enables the gas sprayed by the nozzles to be quickly thrown out, so that the gas in the shell is quickly mixed with the sprayed gas. The top of the rotating body 6-1-4 is provided with a gas containing box 6-1-5 penetrated by the rotating shaft; referring to fig. 4, the gas containing box 6-1-5 contains an acid gas containing cavity 6-1-51 and an alkaline gas containing cavity 6-1-52, a control valve A6-1-53 is arranged in the acid gas containing cavity 6-1-51, a control valve B6-1-54 is arranged in the alkaline gas containing cavity 6-1-52, the acid containing cavity is communicated with an acid gas channel through the control valve A6-1-53, the alkaline gas containing cavity is communicated with an alkaline gas channel through the control valve B6-1-54, at least two acid and alkali detectors 6-1-2 are symmetrically arranged on the inner wall of the first shell 6-1-1, a main control circuit board is arranged in the controller 6-1-3, a central processor, a memory, a first driving motor and a first storage battery are welded on the main control circuit board, the central processor, the memory, the first driving motor and the first storage battery are respectively connected with the acid and alkali detectors 6-1-2, the memory, the first driving motor, the first storage battery, the control valve A6-1-53 and the control valve B6-1-54, when the first driving motor is meshed with a rotating shaft gear, the central processor starts to start working, the first gas containing cavity 6-1-54 controls the first shell 6 to start the alkaline gas containing cavity to start the first shell 6, and the alkaline gas containing cavity to start the first shell 6-1-3, when the gas in the first shell 6-1-1 is alkaline gas, the central processor controls the control valve A6-1-53 to be opened, the acid gas is sprayed out and mixed with the gas in the first shell 6-1-1, the other extending end of the acid-base neutralizer 6 is connected with the air pump 7 through a flange, and the air pump 7 is externally connected with a power supply. The control principle of the controller is disclosed in the prior art, a circuit part for controlling the control valve to act by the central processing unit according to the information collected by the acid-base detector is not the invention point of the invention, and the control mode by the central processing unit is a common technical means. One end of the corrugated pipe 1 is connected with a gas collecting hood, the gas collecting hood is installed at a vent of a chemical laboratory, a control button is installed on the gas collecting hood, and the control button is used for controlling the on-off of the first storage battery, the second storage battery, the external power supply of the air suction pump and the corresponding power parts, so that the centralized control of laboratory operators is facilitated.

Referring to fig. 3, the rotating body 6-1-4 comprises four blades which are uniformly distributed along the circumferential direction, xenon lamps 6-1-41 are arranged on two blades which are symmetrical to each other, the blades adjacent to the xenon lamps 6-1-41 are provided with spray heads 6-1-42, the xenon lamps 6-1-41 are electrically connected with the controller 6-1-3, and when the controller 6-1-3 is started, the xenon lamps 6-1-41 are electrified and lightened. The blade can carry out intensive mixing with the mist in the first casing for acid gas molecule granule and alkaline gas molecule granule are with quick neutralization, and the bacterium and the virus of laboratory through first casing can be killed as far as to the xenon lamp, prevent that harmful bacterium and virus in the laboratory from flowing out, polluted environment.

Example 2

On the basis of embodiment 1, as shown in fig. 5-6, the low-noise automatic ventilation cleaning device for a harmful gas chemical laboratory further comprises an intermittent adjustment device 4, the intermittent adjustment device 4 comprises a second shell 4-1 and an adjustment assembly, the adjustment assembly is wrapped by the second shell 4-1, two ends of the adjustment assembly extend out of the second shell 4-1, one extending end of the adjustment assembly is fixedly connected with an activated carbon filter 3, an intermittent adjustment valve 4-2 capable of transversely reciprocating is arranged in the adjustment assembly and used for adjusting air volume passing through air, so that pressure difference is formed between air at two ends of the intermittent adjustment valve 4-2 and air is intermittently supplied to one end far away from the activated carbon filter 3, and a sound absorption sponge is arranged between the second shell 4-1 and the adjustment assembly. Wherein, inhale the noise that sound sponge can absorb intermittent type adjusting device produced, the noise reduction is to laboratory operation personnel's influence. Wherein, referring to fig. 6, the adjusting assembly comprises: the third shell 4-3 is of a bilaterally symmetrical structure, two ends of the third shell extend out of the second shell 4-1, and one extending end of the third shell is connected with the activated carbon filter 3 through a pipeline; the driving piece 4-4 is fixedly connected to the outer surface of the second shell 4-1; the transmission piece 4-5 is hung at one end inside the third shell 4-3, one end of the transmission piece 4-5 penetrates through the third shell 4-3 and the second shell 4-1 and is connected with the driving piece 4-4 in a pressing mode, the driving piece 4-4 can drive the transmission piece 4-5 to move up and down along the vertical direction, the other end of the transmission piece 4-5 is fixedly connected with a transverse connecting piece 4-7, the transverse connecting piece 4-7 is fixedly connected with the intermittent adjusting valve 4-2 through a small caliber in the third shell 4-3, the diameter of the intermittent adjusting valve 4-2 is larger than that of the middle of the third shell 4-3, for example, the diameter is 5cm or 8cm, the intermittent adjusting valve 4-2 is ensured not to pass through the middle of the third shell 4-3, the two supporting pieces 4-6 are respectively located at two ends of the transverse connecting piece 4-7 and are in sliding connection with the transverse connecting piece 4-7, and the two supporting pieces 4-6 are respectively and fixedly connected with the inner portions of the third shell 4-3 and are used for supporting the transverse connecting piece 4-7; referring to fig. 11, the supporting member 4-6 includes a sliding shaft seat 4-6-2 slidably connected to the transverse connecting member 4-7 and a supporting rod 4-6-1 disposed at an equal angle along the circumference of the sliding shaft seat 4-6-2, and the end of the supporting rod 4-6-1 is fixedly connected to the inner wall of the third housing 4-3 to ensure the stability of the transverse reciprocating movement of the transverse connecting member 4-7. The elastic reset piece 4-8 is fixedly connected to the inner wall of one end of the third shell 4-3 and elastically connected with one end of the driving piece 4-5 pressing the driving piece 4-4. The aperture of the middle part of the third shell is smaller than the apertures of the two ends, so that the air pressure is gradually increased when the air can flow through a small aperture from a large aperture area, the passing speed of the air is increased, the transmission part is driven by the driving part to drive the transverse connecting part and the intermittent adjusting valve to transversely reciprocate intermittently under the auxiliary action of the elastic resetting part, the transverse reciprocating intermittent motion is matched with the middle part of the third shell with a small aperture, the air flowing through is enabled to intermittently and non-uniformly flow into the acid-base neutralizer, the air neutralization time is increased by being matched with the rotating body in the acid-base neutralizer, and the purpose that the acid-base gas can reach the neutralization is fully ensured.

Referring to fig. 7, the driving member 4-4 includes a fourth casing 4-4-1, the second driving motor 4-4-2 is fixedly connected inside the fourth casing 4-4-1, the cam 4-4-3 is fixedly connected to an output shaft of the second driving motor 4-4-2, the transmission member 4-5 is inserted into the fourth casing 4-4-1 and is connected to the cam 4-4-3 in a pressing manner, the second storage battery 4-4-4 is hung on an outer wall of the fourth casing 4-4-1, and the second storage battery 4-4-4 is electrically connected to the second driving motor 4-4-2. The second storage battery supplies power to the second driving motor, and the second driving motor drives the cam to rotate, so that the pressing end of the transmission piece can intermittently move up and down in the vertical direction.

Referring to fig. 8-9, the transmission member 4-5 includes a pressing section 4-5-1, a Z-shaped force transmission section 4-5-2, and a linkage section 4-5-3, which are integrally formed, the top of the pressing section 4-5-1 is fixedly connected with a contact ball 4-5-4, the contact ball is in contact with the outer surface of the cam, and can smoothly pass through the protruding portion of the cam, so as to ensure the stability of the machine. The bottom of the pressing section 4-5-1 is connected with the Z-shaped force transfer section 4-5-2, one side of the Z-shaped force transfer section 4-5-2 is connected with the linkage section 4-5-3, the front end of the Z-shaped force transfer section 4-5-2 is also provided with a limiting protrusion 10, the linkage section 4-5-3 is sleeved with the transverse connecting piece 4-7, the Z-shaped force transfer section 4-5-2 is provided with a suspension hole 4-5-21, a hanging piece 11 is sleeved in the suspension hole 4-5-21, and one end of the hanging piece 11 is fixedly connected with the inner wall of the third shell 4-3. The sleeve joint of the linkage section 4-5-3 and the transverse connecting piece 4-7 is provided with the buffer spring 12, and the sleeve joint is not of an integrally formed structure, so that stress concentration is often generated at the sleeve joint, the abrasion between the transverse connecting piece and the linkage section is increased due to the stress concentration, the influence of stress concentration is eliminated due to the increase of the buffer spring, and the transverse connecting piece is protected. The elastic reset piece 4-8 comprises an L-shaped support plate 4-8-1, one end of the L-shaped support plate is fixedly connected with the inner wall of the third shell 4-3, the other end of the L-shaped support plate is provided with a sleeve 4-8-2, the joint of the pressing section 4-5-1 and the Z-shaped force transmission section 4-5-2 is arranged in the sleeve 4-8-2, a reset spring 13 is arranged between the joint and the base of the sleeve 4-8-2, the reset spring 13 is fixed between the joint and the base of the sleeve 4-8-2 through a limiting protrusion 10, the sleeve 4-8-2 can meet the motion space of the transmission piece 4-5, the reset spring ensures that the restoring force can be generated after the transmission piece moves downwards, the transmission piece moves downwards and then moves upwards, and therefore the transmission piece can perform intermittent reciprocating motion under the action of the driving piece.

Referring to fig. 10, the sleeve 4-8-2 is a hollow integral structure with a notch formed in one side of the outer wall, and the Z-shaped force transmission section 4-5-2 can move through the notch.

In addition, the outer surface of the second shell 4-1 is connected with an air outlet 9, a filter sponge is arranged in the air outlet 9, the air outlet 9 can eliminate pressure between the second shell 4-1 and the third shell 4-3, and the filter sponge prevents external dust from entering between the second shell 4-1 and the third shell 4-3, so that noise caused by friction of the dust on the shells is prevented.

Example 3

Referring to fig. 14, on the basis of example 2, a stepped sleeve 5 is connected between the intermittent adjusting device and the acid-base neutralizer through a flange, wherein the stepped sleeve 5 is formed by welding multiple stages of sleeves with different diameters, the diameters of the sleeves decrease in sequence, one end with a small diameter is connected with the acid-base neutralizer, and the function of the stepped sleeve is as follows: the purpose of increasing the gas pressure inside the sleeve is gradually achieved through the multistage sleeve 5, so that the impact of gas flow inside the acid-base neutralizer is increased, and the neutralizing efficiency is further improved.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the acid or alkaline harmful gas is subjected to harmless treatment in a manner that the acid or alkaline neutralizer is connected with the rear side of the activated carbon filter through the flange, so that the harmful gas is prevented from being discharged out of a laboratory to further pollute the environment. The bellows, the activated carbon filter and the acid-base neutralizer are all installed inside the laboratory, and one end of the bellows is connected with the gas collecting hood flange and directly exhausts gas to the external environment through the air pump arranged outside the laboratory. And two mutual symmetry gas circuit passageways of being listed as in the acid-base neutralizer break-make acid gas circuit passageway and alkaline gas circuit passageway along with the control of controller for acid gas or alkaline gas pass through shower nozzle blowout rotor, along with the centrifugal force that the rotor produced, make acid gas or alkaline gas to all around get rid of to first casing inside, make the inside gaseous abundant neutralization of first casing for neutralization reaction rate. The controller controls the mechanical parts to act to realize automatic operation, and the acid-base detector detects the pH value of gas in the first shell in real time and transmits information to the controller to ensure that the controller can quickly react. The invention can realize the purpose of automatically cleaning harmful gas through the mechanism.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (2)

1. The utility model provides an automatic ventilation cleaning device of low noise that harmful gas chemistry experiment used, installs in the vent department of chemistry experiment room, includes: the corrugated pipe (1) and the activated carbon filter (3) connected with one end of the corrugated pipe (1) in a flange mode are characterized by further comprising an acid-base neutralizer (6), wherein the acid-base neutralizer (6) comprises a first shell (6-1-1) with two symmetrical extending ends, the extending ends are communicated with the inside of the first shell (6-1-1), sound-absorbing sponge is wrapped outside the first shell (6-1-1), one extending end is connected with the activated carbon filter (3) in a flange mode, a controller (6-1-3) is arranged at the top of the first shell (6-1-1), and the controller (6-1-3) is connected with a rotating shaft, the rotating shaft is vertically inserted into the first shell (6-1-1), a rotating body (6-1-4) is sleeved on the rotating shaft positioned in the first shell (6-1-1), two rows of mutually symmetrical gas path channels are pre-embedded on the rotating body (6-1-4) along the axial direction, one row is an acidic gas path channel, the other row is an alkaline gas path channel, a plurality of spray heads (6-1-42) are distributed on the gas path channels, a gas containing box (6-1-5) penetrated by the rotating shaft is arranged at the top of the rotating body (6-1-4), and the gas containing box (6-1-5) contains an acidic gas containing cavity (6-1-51) and an alkaline gas containing cavity (6-1-51) 6-1-52), a control valve A (6-1-53) is arranged in the acid gas accommodating cavity (6-1-51), a control valve B (6-1-54) is arranged in the alkaline gas accommodating cavity (6-1-52), the acid gas accommodating cavity is communicated with an acid gas channel through the control valve A (6-1-53), the alkaline gas accommodating cavity is communicated with an alkaline gas channel through the control valve B (6-1-54), at least two acid-base detectors (6-1-2) are symmetrically arranged on the inner wall of the first shell (6-1-1), a main control circuit board is arranged in the controller (6-1-3), a central processor, a memory, a first driving motor and a first storage battery are welded on the main control circuit board in a circuit mode, the central processor is respectively connected with the acid-base detector (6-1-2), the memory, the first driving motor, the first storage battery, the control valve A (6-1-53) and the control valve B (6-1-54) through the main control circuit board, the first driving motor is meshed with a rotating shaft gear, when the rotating shaft gear is meshed, the first driving motor starts to work, the first driving motor (6-1-1) collects the information of the acid-2 and the first alkaline gas detector (6-1-3), when the gas in the first shell (6-1-1) is acidic gas, the central processor controls the control valve B (6-1-54) to be opened, the alkaline gas is sprayed out and mixed with the gas in the first shell (6-1-1) in a rotating manner, when the gas in the first shell (6-1-1) is alkaline gas, the central processor controls the control valve A (6-1-53) to be opened, the acidic gas is sprayed out and mixed with the gas in the first shell (6-1-1) in a rotating manner, and the other extending end of the acid-base neutralizer (6) is connected with the air pump (7) in a flange manner;

the rotating body (6-1-4) comprises four blades which are uniformly distributed along the circumferential direction, xenon lamps (6-1-41) are arranged on the two blades which are symmetrical to each other, spray heads (6-1-42) are arranged on the blades which are adjacent to the xenon lamps (6-1-41), the xenon lamps (6-1-41) are electrically connected with a controller (6-1-3), and when the controller (6-1-3) is started, the xenon lamps (6-1-41) are powered on;

the intermittent adjustment device (4) comprises a second shell (4-1) and an adjustment assembly, the second shell (4-1) wraps the adjustment assembly, two ends of the adjustment assembly extend out of the second shell (4-1), one extending end of the adjustment assembly is fixedly connected with the activated carbon filter (3), an intermittent adjustment valve (4-2) capable of transversely reciprocating is arranged in the adjustment assembly and used for adjusting the air volume passing through air, so that the air at two ends of the intermittent adjustment valve (4-2) forms pressure difference and intermittently supplies air to one end far away from the activated carbon filter (3), and an acoustic absorption sponge is arranged between the second shell (4-1) and the adjustment assembly;

the adjustment assembly includes: the device comprises a third shell (4-3) with large calibers at two ends and small calibers in the middle, a driving piece (4-4), a transmission piece (4-5), two supporting pieces (4-6) and an elastic resetting piece (4-8), wherein the third shell (4-3) is of a bilateral symmetry structure, two ends of the third shell extend out of the second shell (4-1), and one extending end of the third shell is connected with an activated carbon filter (3) through a pipeline;

the driving piece (4-4) is fixedly connected to the outer surface of the second shell (4-1);

the transmission piece (4-5) is suspended at one end inside the third shell (4-3), one end of the transmission piece (4-5) penetrates out of the third shell (4-3) and the second shell (4-1) and is in compression connection with the transmission piece (4-4), the transmission piece (4-4) can be driven by the transmission piece (4-5) to move up and down along the vertical direction, the other end of the transmission piece (4-5) is fixedly connected with a transverse connecting piece (4-7), the transverse connecting piece (4-7) is fixedly connected with the intermittent adjusting valve (4-2) through a small caliber in the third shell (4-3), and the diameter of the intermittent adjusting valve (4-2) is larger than the middle diameter of the third shell (4-3);

the two supporting pieces (4-6) are respectively positioned at two ends of the transverse connecting piece (4-7) and are in sliding connection with the transverse connecting piece (4-7), and the two supporting pieces (4-6) are respectively fixedly connected with the inner parts of two ends of the third shell (4-3) and are used for supporting the transverse connecting piece (4-7);

the elastic reset piece (4-8) is fixedly connected to the inner wall of one end of the third shell (4-3) and is elastically connected with one end, pressed by the driving piece (4-4), of the driving piece (4-5);

the driving piece (4-4) comprises a fourth shell (4-4-1), a second driving motor (4-4-2) is fixedly connected inside the fourth shell (4-4-1), a cam (4-4-3) is fixedly connected to an output shaft of the second driving motor (4-4-2), the transmission piece (4-5) is inserted into the fourth shell (4-4-1) and is in compression connection with the cam (4-4-3), a second storage battery (4-4-4) is hung on the outer wall of the fourth shell (4-4-1), and the second storage battery (4-4-4) is in electric connection with the second driving motor (4-4-2);

the transmission part (4-5) comprises a compression section (4-5-1), a Z-shaped force transmission section (4-5-2) and a linkage section (4-5-3) which are integrally formed, the top of the compression section (4-5-1) is fixedly connected with a contact ball (4-5-4), the bottom of the compression section (4-5-1) is connected with the Z-shaped force transmission section (4-5-2), one side of the Z-shaped force transmission section (4-5-2) is connected with the linkage section (4-5-3), the linkage section (4-5-3) is sleeved with a transverse connecting piece (4-7), a suspension hole (4-5-21) is formed in the Z-shaped force transmission section (4-5-2), a pendant (11) is sleeved in the suspension hole (4-5-21), and one end of the pendant (11) is fixedly connected with the inner wall of a third shell (4-3);

a buffer spring (12) is arranged at the sleeve joint of the linkage section (4-5-3) and the transverse connecting piece (4-7);

elasticity piece (4-8) that resets includes L backup pad (4-8-1), the one end of L backup pad (4-8-1) with third casing (4-3) inner wall fixed connection, install sleeve (4-8-2) on the other end plane, compress tightly the junction of section (4-5-1) and Z shape power transmission section (4-5-2) and place in sleeve (4-8-2) just install reset spring (13) between junction and sleeve (4-8-2) base, sleeve (4-8-2) can satisfy the motion space of driving medium (4-5).

2. A low-noise automatic ventilating and cleaning device for a hazardous gas chemical laboratory according to claim 1, wherein the sleeve (4-8-2) is a hollow one-piece structure with a notch formed on one side of the outer wall, and the Z-shaped force transmission section (4-5-2) can move through the notch.

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