CN215175749U - Positive pressure adjusting device for laboratory - Google Patents

Abstract

The utility model relates to the technical field of laboratory pneumatic adjustment, in particular to a laboratory positive pressure adjusting device, which comprises an air inlet and an air return port, wherein the air inlet and the air return port are connected through a gas circulation pipe, the gas circulation pipe is provided with a gas circulation pump, the air inlet is provided with a first high-efficiency filter, the air inlet is connected with an air supplement pipe, the air supplement pipe is provided with a gas one-way valve, the wall body of a laboratory is communicated with an air release adjusting mechanism, and the air release adjusting mechanism is connected with a control system; carry out the internal circulation through the gas circulation pipe with the gas in laboratory, handle through first high efficiency filter to guarantee that the gas in the laboratory is in the dynamic balance state, ensure experimenter's safety, can adjust indoor outer atmospheric pressure balance, it is total through disappointing adjustment mechanism, control system, the utility model has the advantages of can maintain atmospheric pressure balance, guarantee the normal clear of experiment, prevent that laboratory gas leakage from to external harm that causes and ensure experimenter safety.

Description

Positive pressure adjusting device for laboratory

Technical Field

The utility model relates to a laboratory pneumatic control technical field, a laboratory malleation adjusting device specifically says so.

Background

The laboratory is a special place for completing various research experiments and examinations, and is widely applied to the industries of biological pharmacy, medical treatment, chemical industry, tobacco, scientific research and teaching and the like. The laboratory technician is in experiment and inspection process, often need use the more strong poisonous chemical reagent of various volatility and chemical, it is internal to be inhaled by the laboratory technician easily, cause great harm to its healthy, in order to reduce the harm of various toxic gases to the laboratory technician health, can guarantee the normal clear of experiment and inspection simultaneously again, need guarantee the circulation of laboratory interior gas and external gas usually, but the discharge laboratory of toxic gas not through handling, also can cause harm to the external world, therefore, how to overcome the technical problem and the defect of above-mentioned existence and become the problem that key needs to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an invention aims at overcoming the defect that describes in the background art to realize one kind and can maintain atmospheric pressure balance, guarantee the normal clear of experiment, prevent that laboratory gas leakage from causing harm and guaranteeing laboratory malleation adjusting device of experimenter safety to the external world.

In order to achieve the purpose of the invention, the technical scheme of the utility model is as follows: the utility model provides a laboratory malleation adjusting device, is including setting up air inlet and the return air inlet in the laboratory, connect through the gas flow pipe between air inlet and the return air inlet, be provided with gas circulating pump on the gas flow pipe, gas inlet department is provided with a high efficiency filter, and gas inlet department is connected with the air supplement pipe, be provided with gaseous one-way valve on the air supplement pipe, the intercommunication is provided with disappointing adjustment mechanism on the laboratory wall body, disappointing adjustment mechanism is connected with control system.

Further, the adjusting mechanism loses heart and adjusts the box including losing heart, the roof right side that loses heart and adjusts the box articulates there is the activity lid, the lower part of activity lid is provided with first lug and second lug, loses heart and is provided with first activity groove and the second activity groove that corresponds with first lug, second lug respectively on the bottom plate of adjusting the box, first activity inslot is connected with the spring, the end connection of spring has the stopper, the stopper can be in the activity of first activity inslot, be provided with pressure sensor in the second activity inslot, the right side that loses heart is adjusted the box is fixed with the second high efficiency filter, activity lid is in the inboard of second high efficiency filter, and the gas of laboratory can carry out the internal circulation through the gas flow tube under normal condition, and the gas of laboratory can carry out filtration cycle through first high efficiency filter and use, be in the dynamic balance state, when the indoor pressure of laboratory is powerful in atmospheric pressure, gas can outwards circulate, the movable cover quilt is lifted, handle the gas that flows through second high efficiency filter, prevent that laboratory gas leakage from causing harm to the external world, the second lug no longer contacts with pressure sensor this moment, pressure sensor's reading returns to zero, when pressure in the laboratory is less than atmospheric pressure, the movable cover receives the effect of indoor pressure, pressure sensor's registration can increase, need gaseous the benefit to maintain indoor outer pressure equal.

Further, when the movable cover body is in a vertical state, the pressure of the first bump on the spring is equal to the elastic force of the spring on the first bump, and the movable cover body rotates under the action of force when the movable cover body is in a dynamic balance state.

Further, when the movable cover body is in the vertical state, the second bump is just contacted with the pressure sensor, and the pressure sensor has a determined initial value.

Further, the control system comprises a PLC (programmable logic controller), the PLC is connected with a gas circulating pump, an alarm A, an alarm B and a gas one-way valve, the PLC is connected with a pressure sensor, the pressure sensor transmits a numerical value to the PLC, when the reading of the pressure sensor returns to zero, the PLC triggers the alarm A to send an alarm, discharged gas is processed through a second high-efficiency filter, the harm of the gas leakage of a laboratory to the outside is prevented, meanwhile, experimental gas is ensured not to stay in the laboratory all the time, the safety of experimenters is ensured, when the reading of the pressure sensor is larger than an initial value, the PLC triggers the alarm B to send an alarm, the gas one-way valve is controlled to be opened, outdoor gas is supplied to the interior through a gas supply pipe in a negative pressure state until the pressure sensor returns to the initial value, and then, the gas one-way valve is closed, the indoor and outdoor air pressure balance can be maintained, and the normal operation of the experiment is ensured.

The utility model discloses a laboratory malleation adjusting device's beneficial effect:

1. the utility model discloses a laboratory malleation adjusting device carries out the internal circulation through the gas circulation pipe with the gas in laboratory to handle through first high efficiency filter, thereby guarantee that the gas in the laboratory is in the dynamic balance state, and can handle the gas in the laboratory, reduce the inspiratory unprocessed gas volume of experimenter, ensure experimenter's safety.

2. The utility model discloses a laboratory malleation adjusting device, when the dynamic balance of the inside gas cycle of laboratory is broken, when self circulation is not enough to keep laboratory and outdoor atmospheric pressure balanced, the laboratory need be to outer exhaust gas, pressure sensor's reading zero at this moment, PLC controller triggers alarm A and sends out the police dispatch newspaper, the gas of combustion passes through the processing of second high efficiency filter, prevent the laboratory gas leakage to the harm of external world, ensure simultaneously that the laboratory gas can not stop in the laboratory all the time, ensure experimenter's safety, when pressure sensor's reading is greater than initial value, PLC controller triggers alarm B and sends out the police dispatch newspaper, and control gas one-way valve to open simultaneously, under negative pressure state, outdoor gas passes through the moisturizing pipe and supplies gas to the room, until pressure sensor gets back to the initial value, close gas one-way valve this moment, can maintain indoor outer atmospheric pressure balance, ensure the normal operation of the experiment.

Drawings

Fig. 1 is a schematic structural diagram of a positive pressure adjusting device in a laboratory according to the present invention;

FIG. 2 is an enlarged schematic view of A in FIG. 1;

fig. 3 is a schematic structural diagram of a control system of the positive pressure adjusting device in the laboratory.

In the figure: 1-laboratory, 2-first high-efficiency filter, 3-air supplement pipe, 31-gas one-way valve; 4-gas circulating pump, 5-gas circulating pipe;

the air leakage adjusting mechanism: 61-a gas release adjusting box body, 62-a movable cover body, 63-a second efficient filter, 64-a first movable groove, 65-a first bump, 66-a limiting block, 67-a spring, 68-a pressure sensor, 69-a second movable groove and 610-a second bump;

7-air return inlet, 8-PLC controller, 9-alarm A, 10-alarm B, 11-air inlet.

Detailed Description

The present invention will be described in more detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-3, the positive pressure adjustment device for laboratory 1 of this embodiment, on the basis of ensuring the safety of the experimenter, achieves the technical effects of maintaining the air pressure balance, ensuring the normal operation of the experiment, and preventing the air leakage of laboratory 1 from causing damage to the outside, the structure of this embodiment includes an air inlet 11 and an air return opening 7 arranged in laboratory 1, the air inlet 11 and the air return opening 7 are connected through an air circulation pipe 5, the air circulation pipe 5 is provided with an air circulation pump 4, the air circulation pump 4 is used for accelerating the circulation speed of the air in laboratory 1, so as to reduce the retention time of the air generated by the experiment in laboratory 1, the air inlet 11 is provided with a first high efficiency filter 2 for filtering the circulating air to ensure the safety of the experimenter, the air inlet 11 is connected with an air supplement pipe 3, the air supplement pipe 3 is provided with an air one-way valve 31, the gas supplementing device is used for supplementing gas into the laboratory 1 under specific conditions so as to maintain the balance of the gas pressure and ensure the normal running of an experiment, the gas in the laboratory 1 can be internally circulated through the gas circulation pipe 5 under normal conditions, and the gas in the laboratory 1 can be filtered and recycled through the first high-efficiency filter 2 and is in a dynamic balance state.

Referring to fig. 1-2, a deflation adjustment mechanism is communicatively disposed on a wall body of the laboratory 1 according to the embodiment of this market, the deflation adjustment mechanism includes a deflation adjustment box body 61, a movable cover body 62 is hinged to a right side of a top plate of the deflation adjustment box body 61, a first protrusion 65 and a second protrusion 610 are disposed on a lower portion of the movable cover body 62, a first movable groove 64 and a second movable groove 69 corresponding to the first protrusion 65 and the second protrusion 610 are respectively disposed on a bottom plate of the deflation adjustment box body 61, a spring 67 is connected in the first movable groove 64, an end of the spring 67 is connected with a limit block 66, the limit block 66 can move in the first movable groove 64, the movable cover body 62 is in a vertical state in an initial state, a pressure of the first protrusion 65 on the spring 67 is equal to an elastic force of the spring 67 on the first protrusion 65, and is in a dynamic balance state, and the movable cover body 62 rotates under a force, a pressure sensor 68 is arranged in the second movable groove 69, the second bump 610 is just in contact with the pressure sensor 68 in an initial state, at this time, the pressure sensor 68 has a determined initial value, the second high-efficiency filter 63 is fixed on the right side of the air leakage adjusting box body 61, and the movable cover body 62 is positioned on the inner side of the second high-efficiency filter 63; when laboratory 1's indoor pressure is strong in atmospheric pressure, gas can outwards circulate, activity lid 62 is lifted, handle the gas that flows out through second high efficiency filter 63, prevent that laboratory 1 gas leakage from causing harm to the external world, second lug 610 no longer contacts with pressure sensor 68 this moment, pressure sensor 68's reading returns to zero, when pressure in laboratory 1 is less than atmospheric pressure, activity lid 62 receives the effect of indoor pressure, pressure sensor 68's registration can increase, need gaseous the benefit to equal in order to maintain indoor outer pressure.

Referring to fig. 1-3, the bleed adjustment mechanism of the present embodiment is coupled to a control system. The control system comprises a PLC (programmable logic controller) 8, the PLC 8 is connected with a gas circulating pump 4, an alarm A9, an alarm B10 and a gas one-way valve 31, the PLC 8 controls the gas circulating pump 4 to work all the time after being communicated with the PLC 8, the PLC 8 is connected with a pressure sensor 68, when the reading of the pressure sensor 68 returns to zero, the pressure sensor 68 transmits the value to the PLC 8, the PLC 8 triggers the alarm A9 to give an alarm, the discharged gas is processed by a second high-efficiency filter 63, the harm of the gas leakage of the laboratory 1 to the outside is prevented, meanwhile, the experimental gas is prevented from staying in the laboratory 1 all the time, the safety of experimenters is ensured, when the reading of the pressure sensor 68 is larger than an initial value, the pressure sensor 68 transmits the value to the PLC 8, the PLC 8 triggers the alarm B10 to give an alarm, and the gas one-way valve 31 is controlled to be opened at the same time, under the negative pressure state, outdoor gas is supplemented to the room through the gas supplementing pipe 3 until the pressure sensor 68 returns to the initial value, and at the moment, the gas one-way valve 31 is closed, so that the indoor and outdoor air pressure balance can be maintained, and the normal operation of the experiment is ensured.

The application principle and the application method of the embodiment are as follows: after the PLC controller 8 is communicated, the PLC controller 8 controls the gas circulating pump 4 to work all the time, under normal conditions, the gas in the laboratory 1 can be internally circulated through the gas circulating pipe 5, the gas in the laboratory 1 can be filtered and recycled through the first high-efficiency filter 2 and is in a dynamic balance state, when the indoor pressure of the laboratory 1 is higher than the atmospheric pressure, the gas can be circulated outwards, the movable cover body 62 is lifted, the gas flowing out is treated through the second high-efficiency filter 63, the harm of the gas leakage in the laboratory 1 to the outside is prevented, at the moment, the second bump 610 is not in contact with the pressure sensor 68 any more, the reading of the pressure sensor 68 returns to zero, at the moment, the pressure sensor 68 transmits the value to the PLC controller 8, the PLC controller 8 triggers the alarm A9 to give an alarm, the discharged gas is treated through the second high-efficiency filter 63, the harm of the gas leakage in the laboratory 1 to the outside is prevented, simultaneously, ensure that experimental gas can not stop all the time in laboratory 1, ensure experimenter's safety, when pressure in laboratory 1 is less than atmospheric pressure, activity lid 62 receives the effect of indoor pressure, pressure sensor 68's registration can increase, pressure sensor 68 sends numerical value to PLC controller 8 this moment, PLC controller 8 triggers alarm B10 and sends out the police dispatch newspaper, and control gas one-way valve 31 to open simultaneously, under negative pressure state, outdoor gas passes through air supplement pipe 3 and supplies air to indoor, until pressure sensor 68 gets back to the initial value, close gas one-way valve 31 this moment, can maintain indoor outer atmospheric pressure balanced, guarantee the normal clear of experiment.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various modifications and changes may be made to the specific embodiments without departing from the concept of the present invention, and various combinations of the technical features and structures of the present invention may be implemented without departing from the scope of the present invention.

Claims (5)

1. The utility model provides a laboratory malleation adjusting device, is including setting up air inlet and the return air inlet in the laboratory, connect its characterized in that through the gas flow union coupling between air inlet and the return air inlet: the utility model discloses a laboratory experiment device, including air inlet department, air inlet department is provided with first high efficiency filter, and air inlet department is connected with the air supplement pipe, be provided with gas one-way valve on the air supplement pipe, be provided with gas circulating pump on the gas circulating pipe, the intercommunication is provided with disappointing adjustment mechanism on the laboratory wall body, disappointing adjustment mechanism is connected with control system.

2. The positive laboratory pressure adjustment device according to claim 1, characterized in that: the adjusting mechanism loses heart including losing heart adjusting box body, the roof right side that loses heart adjusting box body articulates there is the activity lid, the lower part of activity lid is provided with first lug and second lug, loses heart and is provided with the first movable groove and the second movable groove that correspond with first lug, second lug respectively on adjusting box body's the bottom plate, first movable inslot is connected with the spring, the end connection of spring has the stopper, and the stopper can be at first movable inslot activity, the second movable inslot is provided with pressure sensor, the right side that loses heart adjusting box body is fixed with the second high efficiency filter, the activity lid is in the inboard of second high efficiency filter.

3. The positive laboratory pressure adjustment device according to claim 2, characterized in that: when the movable cover body is in a vertical state, the pressure of the first convex block on the spring is equal to the elastic force of the spring on the first convex block, and the movable cover body is in a dynamic balance state.

4. The positive laboratory pressure adjustment device according to claim 2, characterized in that: when the movable cover body is in a vertical state, the second bump is just in contact with the pressure sensor.

5. The positive laboratory pressure adjustment device according to claim 4, characterized in that: the control system comprises a PLC, the PLC is connected with a gas circulating pump, an alarm A, an alarm B and a gas one-way valve, and the PLC is connected with a pressure sensor.

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