Public engineering pipeline device in laboratory floor fume hood

Abstract

The utility model discloses a public engineering pipeline device in a floor ventilation cabinet of a laboratory, which relates to the technical field of pipeline devices in floor ventilation cabinets of laboratories and comprises a plurality of working pipes arranged in the floor ventilation cabinet. The working pipe is respectively connected with a low-temperature water circulation mechanism, an air distribution mechanism and a nitrogen distribution mechanism through pipelines; the nitrogen distribution mechanism is used for providing stable and non-interfering nitrogen into the plurality of floor ventilation cabinets; by arranging the working pipe, the low-temperature water circulation mechanism, the air distribution mechanism and the nitrogen distribution mechanism, the utilization efficiency of cooling water and ventilation equipment in a laboratory is improved, the investment cost of experimental equipment is reduced, the pressure and temperature of low-temperature circulation water and the pressure of nitrogen and air are ensured, the accuracy, reliability and repeatability of experiments are ensured, one machine is multipurpose, and the working efficiency is improved. The operability of experimenters is reduced, the number of experiment steel cylinders is reduced, and safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline devices in laboratory floor-standing fume hoods, in particular to a public engineering pipeline device in laboratory floor-standing fume hoods. Background Art

[0002] In the laboratory, solvent recovery for esterification condensation, distillation, desolventization, and other processes requires cooling the solvent and low-boiling-point substances through a glass condenser with ice water for recovery. Furthermore, nitrogen and air are required for the esterification reaction, desolventization, and distillation processes. Therefore, multiple pipes are required to be connected to the fume hood to recover and introduce nitrogen and air.

[0003] If each separate fume hood is equipped with an air compressor, a low-temperature circulating water pump, and a nitrogen cylinder, on the one hand, the investment cost of the fume hood will increase, and on the other hand, multiple nitrogen cylinders will reduce the safety of the laboratory. Too many pipes will lead to too many holes on the fume hood surface, and the fume hood will lose its optimal ventilation effect, which is detrimental to the health of the experimenters and unfriendly to the work environment. Utility Model Content

[0004] The main purpose of the utility model is to provide a public engineering piping device in a laboratory floor-standing fume hood, which can effectively solve the technical problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A utility piping device in a laboratory floor-standing fume hood includes a plurality of working pipes, the working pipes being arranged in the floor-standing fume hood and connected to a low-temperature water circulation mechanism, an air distribution mechanism, and a nitrogen distribution mechanism through pipelines.

[0007] The low-temperature water circulation mechanism is used to provide cooling water to multiple floor-standing fume hoods;

[0008] The air distribution mechanism is used to provide air to multiple floor-standing fume hoods;

[0009] The nitrogen gas distribution mechanism is used to provide nitrogen to multiple floor-standing fume hoods.

[0010] As a further solution of the present utility model, the low-temperature water circulation mechanism includes a water tank, a low-temperature circulating water pump is fixedly connected to the water tank, one end of the low-temperature circulating water pump is fixedly connected to a water outlet main pipe, a water outlet main pipe is provided with a water outlet main valve, the water outlet main pipe is connected to a plurality of water outlet branches through a sleeve, the water outlet branch pipes are provided with a water outlet pipe branch ball valve, and the water outlet branch pipes are fixedly connected to the working pipe.

[0011] As a further solution of the present utility model, a return water main pipe is connected to the water tank, a return water branch pipe is connected between the return water main pipe and the working pipe, a return water branch pipe is provided with a return water pipe branch ball valve, a bypass pipe is fixedly connected to the return water main pipe, a bypass regulating valve and a regulating valve pressure gauge are provided between the return water main pipe and the bypass pipe, and an inlet valve is provided on the return water main pipe.

[0012] As a further solution of the present invention, the air distribution mechanism includes an air compressor, which is fixedly connected to an air main pipe, and the air main pipe is provided with an air compressor output main valve. One end of the air main pipe is connected to a plurality of air branches through a sleeve, and the air branch pipe is provided with an air compressor branch ball valve. The air branch pipe is fixedly connected to the working pipe.

[0013] As a further solution of the present utility model, the nitrogen gas distribution mechanism includes a nitrogen cylinder, which is connected to a nitrogen output pipe through a pressure-resistant metal hose, and a nitrogen cylinder ball valve is provided on the nitrogen output pipe. The nitrogen output pipe is connected to a nitrogen card sleeve main pipe, and the other end of the nitrogen card sleeve main pipe is installed with multiple nitrogen branch pipes through a card sleeve, and a nitrogen branch pipe is provided with a nitrogen shunt ball valve. The nitrogen branch pipe is fixedly connected to the working pipe, and a nitrogen total pressure valve is provided on the nitrogen card sleeve main pipe near the nitrogen output pipe, and a nitrogen output pressure valve is provided on the nitrogen card sleeve main pipe near the nitrogen branch pipe. A nitrogen pressure reducing valve is provided on the nitrogen card sleeve main pipe between the nitrogen total pressure valve and the nitrogen output pressure valve.

[0014] As a further solution of the present invention, there are two nitrogen cylinders, namely a main nitrogen cylinder and a backup nitrogen cylinder.

[0015] The beneficial effects of the utility model are as follows:

[0016] By setting up a working tube, a low-temperature water circulation mechanism, an air distribution mechanism and a nitrogen distribution mechanism, the utilization efficiency of the laboratory's cooling water and ventilation equipment is improved, the investment cost of experimental equipment is reduced, the pressure and temperature of the low-temperature circulating water and the pressure of nitrogen and air are guaranteed, the accuracy, reliability and repeatability of the experiment are ensured, the multi-purpose of one unit is achieved, the operation of the experimenters is reduced, and the number of experimental cylinders is reduced to ensure safety.

[0017] By setting up a low-temperature circulation mechanism, the low-temperature circulation water pump, the water pipe electric pressure regulating valve and the outlet pipe pressure gauge are linked to automatically set and adjust the outlet pressure pipe to ensure that the outlet pipe pressure is 0.1-0.3MPa, ensure that the water pressure of the branch equipment is normal and prevent the outlet pipe pressure from being too high, thereby protecting the glass equipment and the low-temperature circulation water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the overall structure of a utility piping device in a laboratory floor-standing fume hood according to the present invention;

[0019] Figure 2 This is a schematic diagram of a low-temperature water circulation mechanism for a utility piping device in a laboratory floor-standing fume hood according to the present invention;

[0020] Figure 3 This is a schematic diagram of an air distribution mechanism for a utility pipeline device in a laboratory floor-standing fume hood according to the present invention;

[0021] Figure 4 The utility model is a schematic diagram of a nitrogen gas distribution mechanism of a utility pipeline device in a laboratory floor-standing fume hood.

[0022] In the figure: 1. Working pipe;

[0023] 2. Low-temperature water circulation mechanism; 21. Water tank; 22. Low-temperature circulating water pump; 23. Outlet main pipe; 24. Outlet main valve; 25. Outlet branch pipe; 26. Outlet pipe branch ball valve; 27. Return water branch pipe; 28. Return water pipe branch ball valve; 29. ​​Bypass pipe; 210. Bypass regulating valve; 211. Regulating valve pressure gauge; 212. Return water pipe; 213. Inlet valve;

[0024] 3. Air distribution mechanism; 31. Air compressor; 32. Air main pipe; 33. Air compressor output main valve; 34. Air branch pipe; 35. Air compressor branch ball valve;

[0025] 4. Nitrogen gas distribution mechanism; 41. Nitrogen cylinder; 41A. Main nitrogen cylinder; 41B. Backup nitrogen cylinder; 42. Pressure-resistant metal hose; 43. Nitrogen output pipe; 44. Nitrogen cylinder ball valve; 45. Nitrogen ferrule main pipeline; 46. Nitrogen total pressure valve; 47. Nitrogen reducing valve; 48. Nitrogen output pressure valve; 49. Nitrogen branch pipe; 410. Nitrogen branch ball valve. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] like Figure 1-4 As shown, a utility piping device in a laboratory floor-standing fume hood includes multiple working pipes 1. The working pipes 1 are arranged in the floor-standing fume hood. The working pipes 1 are respectively connected to a low-temperature water circulation mechanism 2, an air distribution mechanism 3 and a nitrogen distribution mechanism 4 through pipes, so that air, nitrogen and low-temperature water can be supplied without opening holes in the fume hood.

[0028] In this embodiment, the low-temperature water circulation mechanism 2 includes a water tank 21, to which is fixedly connected a low-temperature circulating water pump 22 for discharging and recovering low-temperature water and regulating the outlet water pressure. One end of the low-temperature circulating water pump 22 is fixedly connected to a main outlet pipe 23, which is equipped with a main outlet valve 24 for controlling the flow of water through the main outlet pipe 23. Multiple outlet branch pipes 25 are connected to the main outlet pipe 23 via sleeves. Each outlet branch pipe 25 is equipped with an outlet pipe shunt ball valve 26. The outlet branch pipes 25 are fixedly connected to the working pipe 1, and the outlet pipe shunt ball valve 26 controls the flow of water through the outlet branch pipes 25. A return water branch pipe 27 is also fixedly mounted on the working pipe 1, equipped with a return water shunt ball valve 28. The outlet pipe shunt ball valve 26 and the return water shunt ball valve 28 control the flow of low-temperature circulating water through the working pipe 1, making operation convenient.

[0029] In this embodiment, the return water branch pipes 27 are all connected to the return water main pipe 212, to which a bypass pipe 29 is fixedly connected. A bypass regulating valve 210 and a regulating valve pressure gauge 211 are provided between the return water main pipe 212 and the bypass pipe 29. The bypass regulating valve 210 can adjust its opening according to the pressure in the return water branch pipe 27, thereby regulating the water pressure in the entire pipeline. The return water main pipe 212 is equipped with an inlet valve 213 to control the connectivity of the entire return water pipe.

[0030] In this embodiment, the air distribution mechanism 3 includes an air compressor 31 for delivering air and regulating air pressure. An air main pipe 32 is fixedly connected to the air compressor 31. This air main pipe 32 is equipped with an air compressor output main valve 33 for controlling the flow of air through the air main pipe 32. One end of the air main pipe 32 is connected to multiple air branches 34 via sleeves. Each of these air branches 34 is equipped with an air compressor shunt ball valve 35. These air branches 34 are fixedly connected to the working pipe 1. The air compressor shunt ball valve 35 controls whether air is allowed to flow into the air branches 34 on the working pipe 1.

[0031] In this embodiment, the nitrogen distribution mechanism 4 includes two nitrogen cylinders 41: a primary nitrogen cylinder 41A and a backup nitrogen cylinder 41B. This allows for continuous gas supply, with one cylinder in operation and the other in reserve, facilitating replacement and use of the nitrogen cylinders 41. The nitrogen cylinders 41 are connected to a nitrogen output pipe 43 via a pressure-resistant metal hose 42, providing increased safety and stability. A nitrogen cylinder ball valve 44 is provided on the nitrogen output pipe 43, enabling selective use of the primary nitrogen cylinder 41A or the backup nitrogen cylinder 41B.

[0032] The nitrogen output pipe 43 is connected to a nitrogen ferrule main pipe 45. The other end of the nitrogen ferrule main pipe 45 is installed with multiple nitrogen branch pipes 49 through a ferrule. The nitrogen branch pipes 49 are provided with nitrogen branch ball valves 410. The nitrogen branch pipes 49 are fixedly connected to the working pipe 1 so that each working pipe 1 can use nitrogen separately without affecting each other at the same pressure.

[0033] A nitrogen total pressure valve 46 is provided on the nitrogen card main pipeline 45 near the nitrogen output pipe 43, a nitrogen output pressure valve 48 is provided on the nitrogen card main pipeline 45 near the nitrogen branch pipe 49, and a nitrogen pressure reducing valve 47 is provided on the nitrogen card main pipeline 45 between the nitrogen total pressure valve 46 and the nitrogen output pressure valve 48 to adjust the output pressure of the nitrogen.

[0034] It should be noted that the present invention is a public engineering piping device in a laboratory floor-standing fume hood. When in use, the low-temperature water circulation mechanism 2 can provide recyclable and pressure-adjustable low-temperature water for the working tube 1. By opening the outlet main valve 24 and the water inlet valve 213, the low-temperature circulating water pump 22 provides power for the water circulation, and the glass condenser is connected through the outlet branch pipe 25 and the return branch pipe 27 on the working tube 1. Then, the outlet pipe branch ball valve 26 and the return pipe branch ball valve 28 are opened, so that the condensed water can be circulated, so that each working tube 1 can use the low-temperature circulating water pressure and temperature independently without affecting each other. In addition, the regulating valve pressure gauge 211 is interlocked with the bypass regulating valve 210 and the low-temperature circulating water pump 22. By setting the maximum outlet water pressure on the low-temperature circulating water pump 22, the bypass regulating valve 210 can be automatically controlled to control the low-temperature water pressure by controlling the regulating valve opening, thereby ensuring the safety of the glass condenser.

[0035] When the working pipe 1 in a fume hood is deactivated, the corresponding outlet pipe branch ball valve 26 and return pipe branch ball valve 28 can be closed. At this time, the pressure of the outlet main pipe 23 increases and is fed back to the low-temperature circulating water pump 22 control system to adjust the opening of the bypass regulating valve 210, thereby controlling the water supply pressure and flow of the experimental working pipe 1 to ensure the cooling amount and reduce the load of the low-temperature circulating water pump 22. Conversely, when multiple experimental working pipes 1 are fully open, the bypass regulating valve 210 is automatically closed to ensure the water pressure of the outlet main pipe 23.

[0036] Air can be supplied to the working pipe 1 through the air distribution mechanism 3, and the air compressor 31 can be started. By opening and closing the air compressor branch ball valve 35, air can be selectively passed to different working pipes 1, so that each working pipe 1 can use the same air pressure independently without affecting each other. The automatic pressure regulation of the air compressor 31 can better adjust the pressure of the air main 32 to meet the process requirements and have good sealing performance.

[0037] Nitrogen can be provided to the working tube 1 through the nitrogen distribution mechanism 4, and can be selectively supplied by the main nitrogen cylinder 41A or the backup nitrogen cylinder 41B through the nitrogen output pipe 43, so that continuous gas supply can be achieved, making it more convenient to replace the nitrogen cylinder 41.

[0038] By opening and closing the nitrogen shunt ball valve 410, the working tube 1 can selectively transport nitrogen, so that the pressure of each working tube 1 is the same when using nitrogen alone and does not affect each other. At the same time, the nitrogen output pressure valve 48 and the nitrogen pressure reducing valve 47 can ensure pressure balance when a single working tube 1 or multiple working tubes 1 are used.

[0039] A single working tube 1 can be used to recover solvents such as esterification condensation, distillation, and desolventization in a fume hood.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A utility piping device for a laboratory floor-standing fume hood, characterized by: The invention comprises a plurality of working pipes (1), wherein the working pipes (1) are arranged in a floor-standing fume hood, and the working pipes (1) are respectively connected to a low-temperature water circulation mechanism (2), an air distribution mechanism (3), and a nitrogen distribution mechanism (4) through pipelines; The low-temperature water circulation mechanism (2) is used to provide cooling water to a plurality of floor-standing fume hoods; The air distribution mechanism (3) is used to provide air to a plurality of floor-standing fume hoods; The nitrogen gas distribution mechanism (4) is used to provide nitrogen to a plurality of floor-standing fume hoods.

2. A utility piping device for a laboratory floor-standing fume hood according to claim 1, characterized in that: The low-temperature water circulation mechanism (2) comprises a water tank (21), a low-temperature circulating water pump (22) is fixedly connected to the water tank (21), one end of the low-temperature circulating water pump (22) is fixedly connected to a water outlet main pipe (23), a water outlet main valve (24) is provided on the water outlet main pipe (23), a plurality of water outlet branch pipes (25) are connected to the water outlet main pipe (23) via a sleeve, a water outlet branch pipe (25) is provided with a water outlet pipe shunt ball valve (26), and the water outlet branch pipe (25) is fixedly connected to the working pipe (1).

3. A utility piping device in a laboratory floor-standing fume hood according to claim 2, characterized in that: The water tank (21) is connected to a return water main pipe (212), a return water branch pipe (27) is connected between the return water main pipe (212) and the working pipe (1), a return water pipe branch ball valve (28) is provided on the return water branch pipe (27), a bypass pipe (29) is fixedly connected to the return water main pipe (212), a bypass regulating valve (210) and a regulating valve pressure gauge (211) are provided between the return water main pipe (212) and the bypass pipe (29), and a water inlet valve (213) is provided on the return water main pipe (212).

4. The utility piping device in a laboratory floor-standing fume hood according to claim 1, characterized in that: The air distribution mechanism (3) includes an air compressor (31), an air main pipe (32) is fixedly connected to the air compressor (31), an air compressor output main valve (33) is provided on the air main pipe (32), one end of the air main pipe (32) is connected to a plurality of air branch pipes (34) through a sleeve, the air branch pipes (34) are provided with air compressor branch ball valves (35), and the air branch pipes (34) are fixedly connected to the working pipe (1).

5. The utility piping device in a laboratory floor-standing fume hood according to claim 1, characterized in that: The nitrogen gas distribution mechanism (4) comprises a nitrogen cylinder (41), the nitrogen cylinder (41) is connected to a nitrogen output pipe (43) via a pressure-resistant metal hose (42), the nitrogen output pipe (43) is provided with a nitrogen cylinder ball valve (44), the nitrogen output pipe (43) is connected to a nitrogen ferrule main pipe (45), the other end of the nitrogen ferrule main pipe (45) is provided with a plurality of nitrogen branch pipes (49) via a ferrule, the nitrogen branch pipes (49) are provided with a nitrogen branch ball valve (44), A valve (410) is provided, wherein the nitrogen branch pipe (49) is fixedly connected to the working pipe (1), a nitrogen total pressure valve (46) is provided on the nitrogen card sleeve main pipe (45) near the nitrogen output pipe (43), a nitrogen output pressure valve (48) is provided on the nitrogen card sleeve main pipe (45) near the nitrogen branch pipe (49), and a nitrogen pressure reducing valve (47) is provided on the nitrogen card sleeve main pipe (45) between the nitrogen total pressure valve (46) and the nitrogen output pressure valve (48).

6. A utility piping device in a laboratory floor-standing fume hood according to claim 5, characterized in that: There are two nitrogen cylinders (41), namely a main nitrogen cylinder (41A) and a backup nitrogen cylinder (41B).

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