CN212431459U - Fume hood cooling water circulation system for experiment teaching - Google Patents

Abstract

The utility model discloses a fume hood cooling water circulation system for experiment teaching, including two fume hoods, be equipped with aqua storage tank and pump in the end cabinet of one of them fume hood, the aqua storage tank passes through the inlet channel and the pump sealing connection of pump, and the outlet pipeline of pump upwards passes the operation mesa arrangement of fume hood on the operation mesa along the connecting frame body of two fume hoods, outlet pipeline and conveying pipeline sealing connection, the cooling water inlet end sealing connection of conveying pipeline and heat exchanger, the cooling water outlet end of heat exchanger and the inlet end sealing connection of return water pipeline, return water pipeline pass the operation mesa along the operation mesa under the bottom surface arrange get into the aqua storage tank bottom and be fixed in on the aqua storage tank side. The utility model discloses the effectual idle space that has utilized in the fume hood, nimble compactness has improved the experimenter simultaneously and has guided teacher's personal safety, and the water economy resource has reduced sewage discharge.

Description

Fume hood cooling water circulation system for experiment teaching

Technical Field

The utility model belongs to a fume hood cooling water circulating system for experiment teaching belongs to experimental apparatus technical field.

Background

The fume hood is a device capable of exhausting harmful gases from the experimental process to protect the safety of experimenters, and is one of the devices essential for teaching Chemical-related experiments (Shan Wei, Brynn Levy, Nataly Hoffman, Claudia Cujar, Reunet Rodney-Sandy, Ronald Wapner, Mary D' alton, Zev Williams. A Rapid and Simple Bead-basic-base Method for Genomic DNA Extraction from Genomic DNA Tissue [ J ]. Biotechnology, 2020, 68(5): 240. Buckup 244; Graeme W normal. grout environmental Laboratory sample Extraction and chemistry [ J ]. Church, Chemical Health & amp, 27. simulation of biological reagent [ J ]. 12, Japan, trade, 2020, 22(1): 73-77; Hongzheng Ruan, Guangye Tang, Bingli Lu. Ventilation cabin et: US 10478873[ P ]. 2019-11-19; Kondechu, Wangbaotao, Lina, et al. China, 210280134[ P ]. 2019-05-09). A double-open floor type fume hood is generally selected as the fume hood for experimental teaching, and the specific structure is shown in figure 1. Every group fume hood is formed by two double open fume hoods combinations, can satisfy four groups of students and experiment simultaneously, but the fume hood of this type of a large laboratory parallel mount array satisfies the demand that multiunit experimenter tested simultaneously. Simultaneously, this fume hood has the transparent window of run from opposite directions, and when parallel installation, the operation condition of whole laboratory personnel is observed simultaneously to the permeable window of laboratory mr, manages and monitors the full-scale experiment, guarantees laboratory personnel's safety. Glass equipment, chemicals and the like required by the experiment are generally stored in a warehouse in a unified mode, are uniformly distributed by professional experimenters before being used, and are placed on an operation table board in a fume hood, so that the safety risk caused by the existence of unnecessary equipment, chemicals and other consumables is further reduced. However, the management method and the structure of the fume hood still have the following problems: (1) the bottom cabinet of the fume hood is idle; (2) because the existence of the ventilating cabinet frame body and the width of the operating table top are not completely matched with the length of the arm exhibition of the experimenter, the idling or partial idling in a red area on the operating table top is usually caused; (3) the problem of safety in use caused by improper arrangement of a cooling water system in the fume hood. Especially cooling water problems, are often the cause of significant laboratory safety accidents.

Cooling water systems are mainly used for cooling reflux in chemical reaction processes, rotary evaporation in purification processes, etc. (Duping, Qinpeng, Chunpian, etc. Synthesis and photovoltaic Properties of receptor-receptor conjugated Polymers based on 4, 7-dithienbenzothiadiazole and isoindigo units [ J ]. organic Chemistry (Chinese English), 2020,40(1): 194 and 200; Liping Yao, Hailiang Liao, Mahish Kumar Ravva, et al, Metal-Free Polymerization: Synthesis and Properties of Fused Benzo [1, 2-b' ] bis [ b ] benzothiophene (BBBT) Polymers [ J ]. Polymer Chemistry, 2020, 11(22):3695 and 3700). In the conventional apparatus, a water tap is generally installed in a red region 1 shown in fig. 1, tap water is directly used as cooling water, and the heated tap water is directly discharged as waste water to a sewer line. Although the operation is convenient, no additional fluid conveying equipment is needed, the equipment cost and part of the operation cost are saved, the water pressure of tap water is unstable, the water pressure is lower in the water using peak period, the cooling effect is poor, and gas generated in the reaction system can not be sufficiently cooled and is gathered in the system, so that the pressure in the reaction system is increased, and the risk of bursting of the reaction system is increased; in the low peak period of water consumption, the water pressure is too high, and the interface between the condenser and the fluid conveying pipeline is easily flushed by high-pressure fluid, so that flood disasters in a laboratory are caused, and huge hidden dangers are brought to the safety of the laboratory; in addition, the running water which is still clean after heat carrying is directly discharged into a sewer as waste water, so that the serious waste of water resources is caused, the treatment capacity of the waste water is increased, and the sewage treatment cost is increased.

In order to solve the problem of cooling water devices and save water resources, a cooling water circulation system (Zhao Tongkun. a cooling water circulation device of a low-pressure turboset: China, 201564679[ P ] 2019-09-8; Zhao Changshan. a cooling water circulation device: China, 111170397[ P ] 2018-11-10) is frequently adopted in industry, the system effectively improves the safety of cooling water operation, greatly saves water resources and avoids the waste of water resources. However, the experimental teaching requires that the experimental design has the characteristics of observability, mobile chirality, limitation of experimental time, operation resistance, high cost performance and the like, and the industrial cooling water circulation system cannot be directly used for experimental teaching. Zhejiang industrial university Zhang Anping (Zhang Anping, Sunzhuangqiang, Maqiao, etc. for laboratory early warning type cooling water circulating device: China 106984249 P.2018-04-12) reports an early warning type cooling water circulating device for a laboratory, which can solve the problems of water resource waste and accidents caused by sudden situations when the laboratory continues experiments for a long time and is unattended. Zhang Xiaoran et al (Zhang Xiaoran, Lianlu, Li Xin, Chuncheng. a laboratory cooling water circulation system, China, 206916835 P.2017-07-03) invented a laboratory cooling water circulation system, and solved the technical problem of increased operation cost caused by the need of wastewater treatment of the cooling water after temperature rise. Tangzier et al (Tangzier, Ningfeng, Zhang Shiyu, a laboratory cooling water circulation system, China 203303974[ P ]. 2013-04-23) invented a laboratory cooling water circulation system, which adopts an internal independent water circulation system, and effectively solves the problems existing in the use process of the laboratory cooling water. However, the design of a cooling water circulation system aiming at the teaching characteristics of experiments and combining the characteristics of a fume hood is not reported.

SUMMERY OF THE UTILITY MODEL

To not enough among the above-mentioned background art, the utility model provides a fume cupboard cooling water circulation system for experiment teaching, this system can solve the inside idle problem and the cooling water device use safety and the extravagant scheduling problem that exists of subregion of fume cupboard for experiment teaching.

The technical scheme of the utility model is realized like this:

the utility model provides a fume hood cooling water circulation system for experiment teaching, includes two fume hoods, is equipped with aqua storage tank and pump in the end cabinet of one of them fume hood, the aqua storage tank passes through the inlet channel and the pump sealing connection of pump, and the outlet pipeline of pump upwards passes the operation mesa arrangement on the operation mesa of fume hood along the connecting frame body of two fume hoods, and outlet pipeline and conveying line sealing connection, conveying line and the cooling water entrance point sealing connection of heat exchanger, the cooling water exit end of heat exchanger and the entrance point sealing connection of return water pipeline, and return water pipeline passes the operation mesa and arranges along operation mesa bottom surface down and get into the tank bottom and be fixed in on the aqua storage tank side.

Furthermore, the water outlet pipeline on the operation table is arranged at the joint part close to the two fume hoods and is vertical to the transparent window of the fume hood.

Furthermore, the fume hood is a double-open floor type fume hood for experiment teaching.

Further, a liquid level meter is installed on the water storage tank.

Furthermore, the water outlet pipeline is connected with the conveying pipeline in a sealing mode through a branch pipe, and a control valve is arranged on the branch pipe.

Furthermore, the number of the branch pipes is four, two sets of cooling devices are arranged in each fume hood, and each cooling device consists of a conveying pipeline, a heat exchanger and a water return pipeline.

Further, the water storage tank and the pump are arranged in the bottom cabinet close to the connecting frame body of the two fume hoods.

Furthermore, the cooling water circulation system is arranged in the fume hood.

Further, the pump can select centrifugal pump, booster pump etc. preferably the booster pump, and the pump passes through inlet channel and aqua storage tank sealing connection. The aqua storage tank is circular, square or rectangle etc., can select stainless steel or plastics material, preferred plastics material, the aqua storage tank side be close to the local trompil of bottom, the aperture size agrees with mutually with booster pump inlet pipe external diameter, links to each other with the inlet channel of booster pump is sealed through the trompil. The liquid level meter can be arranged on the water storage tank by combining a transparent glass pipe or a transparent rigid plastic pipe with a rubber pipe, the lower end of the liquid level meter is connected to the lowest allowable water level of the water storage tank, and the upper end of the liquid level meter is connected to the highest allowable water level.

Further, the heat exchanger can be various types of heat exchangers, and for the heat exchanger for experiment teaching, the heat exchanger can be a spherical condensation pipe or a straight condensation pipe. The water inlet pipeline of the pump can be made of plastic and stainless steel, and the plastic material is preferably selected; the water outlet pipeline of the pump is preferably made of plastic from the pump to the part arranged along the frame body, and the part arranged on the operation table top of the fume hood is preferably made of stainless steel, so that the support is convenient, and the sealing connection with the control valve is convenient; the fluid conveying pipeline and the water return pipeline can be made of plastic materials and latex materials.

The utility model has the advantages that: 1. the utility model discloses fume hood-double open type console mode fume hood cooling water circulating system of arranging for experimental teaching. The reservoir and the fluid conveying equipment pump with the level gauge are arranged at the bottom cabinet of the fume hood, and the idle area of the fume hood for experimental teaching is effectively utilized. The power cord of pump can direct electrical apparatus be connected to the lateral wall of a take the altitude in the fume hood bottom cabinet, the effectual influence of having avoided leaking to the power consumption has reduced the power consumption risk. 2. The portion of the outlet conduit above the countertop and the control valve are located in zone ii of the hood (fig. 2), effectively utilizing the unused area of the hood. The return water pipeline is arranged on the bottom surface under the operation panel through the I internal opening of the region on the operation panel (figure 2), and the idle area of the fume hood is effectively utilized, so that the operation area of the experimenter is kept away from, and the personal safety of the experimenter is further ensured. 3. When the booster pump is used as fluid conveying equipment, the cost is low, and the equipment cost can be effectively reduced; meanwhile, the booster pump can change the pressure in the pipe by pressing the plastic pipe part of the water outlet pipeline of the pump on the operation table top, and the booster pump is started and closed without contacting a power supply, so that the power utilization risk is avoided. 4. The cooling water circulation system effectively saves water resources, reduces sewage discharge, has compact structure, flexible installation and operation and low equipment cost, is suitable for installation of a new laboratory and modification of an old laboratory.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive work.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of the double-open floor type fume hood of the present invention, wherein 1-connecting frame body, 2-pump, 3-water inlet pipeline, 4-water storage tank, 5-water return pipeline, 6-bottom cabinet, 7-heat exchanger, 8-fume hood, 9-control valve, 10-conveying pipeline, 11-liquid level meter, 12-operation table, 13-water outlet pipeline, 14-air supplement port, 15-transparent window, 16-fume hood switch, 17-region I, 18-region II, 19-power socket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1 and 2, a fume hood cooling water circulation system for experiment teaching, includes two fume hoods 8, fume hood 8 is two opening console mode fume hoods for experiment teaching, is equipped with aqua storage tank 4 and pump 2 in the end cabinet 6 of one of them fume hood, install level gauge 11 on the aqua storage tank 4, further, aqua storage tank 4 and pump 2 set up in the end cabinet of the framework 1 department of being connected that is close to two fume hoods 8. The water storage tank 4 is hermetically connected with the pump 2 through the water inlet pipeline 3 of the pump 2, and the water outlet pipeline 13 of the pump 2 upwards penetrates through the operation table top 12 of the fume hood 8 along the connecting frame body 1 of the two fume hoods 8 and is arranged on the operation table top. An outlet conduit 13 on the countertop is positioned near the junction of the two hoods and is perpendicular to the transparent window 15 of the hood.

The water outlet pipeline 13 is connected with the conveying pipeline 10 in a sealing manner, preferably, the water outlet pipeline is connected with the conveying pipeline in a sealing manner through a branch pipe, and the branch pipe is provided with a control valve 9. The conveying pipeline 10 is connected with a cooling water inlet end of the heat exchanger 7 in a sealing mode, a cooling water outlet end of the heat exchanger 7 is connected with an inlet end of the water return pipeline 5 in a sealing mode, and the water return pipeline 5 penetrates through the operating table board 12 (an opening is formed in the area I17) and is distributed along the lower bottom surface of the operating table board to enter the bottom of the water storage tank 4 and be fixed on the side face of the water storage tank, so that water trouble caused by the water.

Furthermore, the number of the branch pipes is four, two sets of cooling devices are arranged in each fume hood, each cooling device consists of a conveying pipeline, a heat exchanger and a water return pipeline, and it needs to be explained that the water return pipeline positioned at one fume hood bottom cabinet penetrates through a baffle in the bottom cabinet to be communicated with a water storage tank arranged at the other fume hood bottom cabinet.

The cooling water circulation system of the utility model is arranged in the fume hood.

Further, the pump 2 can be a centrifugal pump, a booster pump and the like, preferably the booster pump, and is hermetically connected with the water storage tank through a water inlet pipeline. The aqua storage tank is circular, square or rectangle etc., can select stainless steel or plastics material, preferred plastics material, the aqua storage tank side be close to the local trompil of bottom, the aperture size agrees with mutually with booster pump inlet pipe external diameter, links to each other with the inlet channel of booster pump is sealed through the trompil. The liquid level meter can be arranged on the water storage tank by combining a transparent glass pipe or a transparent rigid plastic pipe with a rubber pipe, the lower end of the liquid level meter is connected to the lowest allowable water level of the water storage tank, and the upper end of the liquid level meter is connected to the highest allowable water level.

Further, the heat exchanger 7 can be various types of heat exchangers, and for the heat exchanger for experiment teaching, the heat exchanger can be a spherical condensation pipe or a straight condensation pipe. The water inlet pipeline of the pump can be made of plastic and stainless steel, and the plastic material is preferably selected; the water outlet pipeline of the pump is preferably made of plastic from the pump to the part arranged along the frame body, and the part arranged on the operation table top of the fume hood is preferably made of stainless steel, so that the support is convenient, and the sealing connection with the control valve is convenient; the fluid conveying pipeline and the water return pipeline can be made of plastic materials and latex materials.

The utility model discloses fume hood-double open type console mode fume hood cooling water circulating system of arranging for experimental teaching. The reservoir and the fluid conveying equipment pump with the level gauge are arranged at the bottom cabinet of the fume hood, and the idle area of the fume hood for experimental teaching is effectively utilized. The power cord of pump can direct electrical apparatus be connected to the lateral wall of a take the altitude in the fume hood bottom cabinet, the effectual influence of having avoided leaking to the power consumption has reduced the power consumption risk. The portion of the outlet conduit above the countertop and the control valves are located in region ii 18 of the hood (fig. 2), effectively utilizing the unused area of the hood. The return water pipeline is arranged on the bottom surface under the operation panel through the I17 internal opening hole of the region on the operation panel surface (figure 2), and the idle zone of the fume hood is effectively utilized, so that the operation zone of the experimenter is kept away, and the personal safety of the experimenter is further ensured.

The temperature of the water in the water storage tank is an important factor influencing the cooling effect of the cooling water. To investigate the operating performance of the equipment, the following experiment was designed: adding 2/3 water level water into the water storage tank, wherein the density of the water is calculated according to the normal temperature, and 1000Kg/m is taken³In time, according to the size of the water storage tank, the water storage amount is calculated as follows: 0.6 × 0.35 × 0.38 × 2/3 × 1000=53.2 Kg; and refluxing n-butanol at room temperature of 22 deg.C under oil bath temperature of 130 deg.C, condensing n-butanol vapor by using the cooling water circulation system, and measuring the change data of water temperature in the water storage tank with cooling circulation time. The test results are shown in the table1 is shown. As the cooling cycle time is extended, the temperature of the water in the reservoir gradually increases, because the cooling water takes heat from the heat exchanger and flows back to the reservoir as it passes through the heat exchanger. Observe the height that the steam rises in the backward flow condenser pipe, if the height is too high, explain that the cooling effect is not good, the accessible adds the ice-cube in the aqua storage tank and realizes reducing the temperature, improves the purpose of cooling effect. In the first 90 minutes of the cooling circulation, the water temperature of the water storage tank does not have an obvious rule when rising, after 90 minutes, the water temperature is in a linear relation with the increase of the cooling circulation time, the total cooling circulation time is 225 minutes =3.75 hours, the water temperature rises by 7.1 ℃ totally, and the requirement of experimental teaching can be better met by the cooling water circulation system under the premise that no additional cooling device or coolant is added aiming at the limited experimental teaching time (within 3.5 hours). In the test process, the student judges the cooling effect of cooling water circulation system through observing the backward flow condition, adds the operation of coolant ice-cube according to the condition, and the participation and the study enthusiasm of improvement student that can be better are favorable to improving experiment teaching effect.

TABLE 1 Water temperature in the reservoir at different cooling cycle times

The present invention is not exhaustive and is well known to those skilled in the art.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a fume hood cooling water circulation system for experiment teaching, includes two fume hoods (8), its characterized in that: a water storage tank (4) and a pump (2) are arranged in a bottom cabinet (6) of one of the fume cabinets (8), the water storage tank (4) is connected with the pump (2) in a sealing mode through a water inlet pipeline (3) of the pump (2), a water outlet pipeline (13) of the pump (2) upwards penetrates through an operation table board (12) of the fume cabinets (8) along a connecting frame body (1) of the two fume cabinets (8) and is arranged on the operation table board (12), the water outlet pipeline (13) is connected with a conveying pipeline (10) in a sealing mode, the conveying pipeline (10) is connected with a cooling water inlet end of a heat exchanger (7) in a sealing mode, a cooling water outlet end of the heat exchanger (7) is connected with an inlet end of a water return pipeline (5) in a sealing mode, and the water return pipeline (5) penetrates through the operation table board and is arranged along the lower bottom surface of.

2. The fume hood cooling water circulation system for experimental teaching according to claim 1, characterized in that: the water outlet pipeline (13) on the operation table top (12) is arranged near the joint of the two fume hoods (8) and is vertical to the transparent window of the fume hood (8).

3. The fume hood cooling water circulation system for experimental teaching according to claim 1, characterized in that: the fume hood (8) is a double-open floor type fume hood for experiment teaching.

4. The fume hood cooling water circulation system for experimental teaching according to claim 1, characterized in that: and a liquid level meter (11) is arranged on the water storage tank (4).

5. The fume hood cooling water circulation system for experimental teaching according to claim 1, characterized in that: the water outlet pipeline (13) is connected with the conveying pipeline (10) in a sealing mode through a branch pipe, and a control valve (9) is arranged on the branch pipe.

6. The fume hood cooling water circulation system for experimental teaching according to claim 5, wherein: the number of the branch pipes is four, two sets of cooling devices are arranged in each fume hood, and each cooling device is composed of a conveying pipeline (10), a heat exchanger (7) and a water return pipeline (5).

7. The fume hood cooling water circulation system for experimental teaching according to claim 1, characterized in that: the water storage tank (4) and the pump (2) are arranged in the bottom cabinet close to the connecting frame body (1) of the two fume hoods (8).

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