Thermodynamic system model for teaching demonstration

Abstract

The thermodynamic system model for teaching demonstration comprises a ball valve, a water collecting pipe, a first filter, a first pressure reducing valve, a safety valve, a first pouring barrel drain valve, a second pouring barrel drain valve, a floating ball drain valve, a flow meter, a first needle valve, a steam-water separator, a heat exchanger, a steam header, a second needle valve, a second pressure reducing valve, a main steam pipe and a first drain pipe. A ball valve is arranged on the steam-distributing cylinder, the steam inlet pipe is connected with the ball valve, one end of the main steam pipe is connected with the other ball valve, the other end of the main steam pipe is connected with an inlet of the steam-water separator through the ball valve, and a water outlet of the steam-distributing cylinder is communicated with the water collecting pipe through the first water discharging pipe; the water inlet pipe is connected with an inlet of the steam-water separator, one end of the steam outlet pipe is connected with a steam outlet of the steam-water separator, the other end of the steam outlet pipe is connected with a steam inlet of the heat exchanger, and a water outlet of the steam-water separator and a water outlet of the steam water heater are respectively communicated with the water collecting pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of steam thermal systems, in particular to a thermal system model for teaching demonstration. Background Art

[0002] The characteristics of industrial steam thermal systems are complex, involving many components such as cylinders, pipelines, brackets, expansion joints, heat exchangers, steam-water separators, ball valves, steam traps, safety valves, pressure reducing valves, filters, pressure gauges, etc. The actual operation of steam thermal systems is accompanied by high temperature and high pressure. During the transportation of steam, condensed water is generated, resulting in pressure damage, temperature reduction, and two-phase flow.

[0003] In order to improve employees' skills in thermal systems, understand the relevant characteristics of the actual steam transportation process, and better master the two-phase flow mechanism and heat exchange principle of steam and condensate, a thermal system model for teaching demonstration is developed. By using air compressor to simulate steam and tap water to simulate condensate, the actual changes of the fluid in the pipeline can be demonstrated on site to enhance employees' understanding of thermal systems. Summary of the invention

[0004] In view of the relevant characteristics of the thermal system, the purpose of the invention of the utility model is to propose a thermal system model for teaching demonstration, which assembles cylinders, bellows compensators, square compensators, heat exchangers, steam-water separators, ball valves, steam traps, safety valves, pressure reducing valves, filters, pressure gauges, brackets, pipelines, etc. The overall structure is beautiful and compact, and air pressure and tap water can be input into the system model to actually simulate the steam transportation and heat exchange process in the thermal system.

[0005] In order to achieve the invention purpose of the utility model, the utility model adopts the following technical solutions:

[0006] The utility model is a thermal system model for teaching demonstration, which comprises: a ball valve, a water collection pipe, a first filter, a first pressure reducing valve, a safety valve, a first dump bucket trap, a second dump bucket trap, a float trap, a flow meter, a first needle valve, a steam-water separator, a heat exchanger, a steam sub-cylinder, a second needle valve, a second pressure reducing valve, a main steam pipe, a first drain pipe, a second drain pipe, a third drain pipe, a water inlet pipe, a steam inlet pipe, a second filter and a steam outlet pipe. The steam-water separator, the heat exchanger and the steam sub-cylinder are respectively fixed on a demonstration board, wherein: three ball valves are arranged on the steam sub-cylinder, the steam inlet pipe is connected to one of the ball valves, the second pressure reducing valve is arranged on the steam inlet pipe, air pressure for demonstration is sent into the steam sub-cylinder, one end of the main steam pipe is connected to the other ball valve, and the other end is connected to the steam-water separator through the ball valve. The inlet of the steam separator is connected to the steam outlet, the drain port of the steam cylinder is communicated with the water collection pipe through the first drain pipe, and a ball valve, a second dump bucket trap and a ball valve are installed on the first drain pipe in sequence; the water inlet pipe is connected to the inlet of the steam-water separator, and a ball valve, a first needle valve and a flow meter are installed on the water inlet pipe in sequence; one end of the steam outlet pipe is connected to the steam outlet of the steam-water separator, and the other end is connected to the steam inlet of the heat exchanger, and a first filter, a first pressure reducing valve, a ball valve, a safety valve, a second needle valve and a ball valve are installed on the steam outlet pipe in sequence; the water outlet of the steam-water separator is communicated with the water collection pipe through the third drain pipe, and a ball valve, a second filter and a float trap are installed on the third drain pipe in sequence; the water outlet of the heat exchanger is communicated with the water collection pipe through the second drain pipe, and a ball valve, a first dump bucket trap and a ball valve are installed on the second drain pipe in sequence.

[0007] The utility model discloses a thermal system model for teaching demonstration, which further comprises a pressure gauge, wherein a pressure gauge is arranged on the steam cylinder, and a pressure gauge is arranged on the steam outlet pipe between the safety valve of the steam outlet pipe and the second needle valve.

[0008] The utility model discloses a thermal system model for teaching demonstration, which further comprises a bellows compensator. The bellows compensator is arranged on the main steam pipe between two ball valves of the main steam pipe.

[0009] The utility model discloses a thermal system model for teaching demonstration, which further comprises a vacuum-breaking steam exhaust valve, which is arranged on the steam outlet pipe between the pressure gauge of the steam outlet pipe and the second needle valve.

[0010] The utility model is a thermal system model for teaching demonstration, which is connected with thermal equipment and valves such as steam cylinder, bellows compensator, square compensator, fixed bracket, steam-water separator model, steam heat exchanger model, ball valve, steam trap, pressure reducing valve, safety valve, vacuum exhaust valve, etc. through sanitary stainless steel polished pipe to achieve high integration. Compressed air is used to simulate steam, and tap water is used to simulate condensed water generated during steam transportation. The working process of thermal system such as steam transportation, heat exchange, and condensed water discharge can be demonstrated on site, so as to enhance employees' understanding of thermal system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a schematic diagram of a thermal system model used for teaching demonstration.

[0012] exist Figure 1 Among them, number 1 is a ball valve; number 2 is a water collection pipe; number 3 is the first filter; number 4 is the first pressure reducing valve; number 5 is a safety valve; number 6 is the first dump bucket trap; number 7 is the second dump bucket trap; number 8 is a float trap; number 9 is a vacuum exhaust valve; number 10 is a flow meter; number 11 is the first needle valve; number 12 is a bellows compensator; number 13 is a pressure gauge; number 14 is a steam-water separator; number 15 is a heat exchanger; number 16 is a steam cylinder; number 17 is the second needle valve; number 18 is the second pressure reducing valve; number 19 is the main steam pipe; number 20 is the first drain pipe; number 21 is the second drain pipe; number 22 is the third drain pipe; number 23 is the water inlet pipe; number 24 is the steam inlet pipe; number 25 is the second filter; number 26 is the steam outlet pipe. DETAILED DESCRIPTION

[0013] like Figure 1As shown, the thermal system model for teaching demonstration of the utility model includes: a ball valve 1, a water collection pipe 2, a first filter 3, a first pressure reducing valve 4, a safety valve 5, a first dump bucket trap 6, a second dump bucket trap 7, a float trap 8, a flow meter 10, a first needle valve 11, a steam-water separator 14, a heat exchanger 15, a steam cylinder 16, a second needle valve 17, a second pressure reducing valve 18, a main steam pipe 19, a first drain pipe 20, a second drain pipe 21, and a third drain pipe 22. , a water inlet pipe 23, a steam inlet pipe 24, a second filter 25 and a steam outlet pipe 26, a steam-water separator 14, a heat exchanger 15 and a steam sub-cylinder 16 are fixed on the demonstration board respectively, characterized in that: three ball valves 1 are installed on the steam sub-cylinder 16, the steam inlet pipe 24 is connected to one of the above-mentioned ball valves 1, a second pressure reducing valve 18 is installed on the steam inlet pipe 24, and air pressure for demonstration is sent into the steam sub-cylinder 16, one end of the main steam pipe 19 is connected to the above-mentioned other ball valve 1, and the other end is separated from the steam and water through the ball valve 1 The inlet of the steam separator 14 is connected, the drain outlet of the steam cylinder 16 is connected to the water collection pipe 2 through the first drain pipe 20, and the ball valve 1, the second dump bucket drain valve 7 and the ball valve 1 are installed in sequence on the first drain pipe 20; the water inlet pipe 23 is connected to the inlet of the steam-water separator 14, and the ball valve 1, the first needle valve 11 and the flow meter 10 are installed in sequence on the water inlet pipe 23; one end of the steam outlet pipe 26 is connected to the steam outlet of the steam-water separator 14, and the other end is connected to the steam inlet of the heat exchanger 15. The first filter 3, the first pressure reducing valve 4, the ball valve 1, the safety valve 5, the second needle valve 17 and the ball valve 1 are sequentially installed on the pipe 26; the water outlet of the steam-water separator 14 is connected to the water collection pipe 2 through the third drain pipe 22, and the ball valve 1, the second filter 25 and the float trap 8 are sequentially installed on the third drain pipe 22; the water outlet of the heat exchanger 15 is connected to the water collection pipe 2 through the second drain pipe 21, and the ball valve 1, the first dump bucket trap 6 and the ball valve 1 are sequentially installed on the second drain pipe 21.

[0014] The thermal system model used for teaching demonstration also includes: a pressure gauge 13, a bellows compensator 12 and a vacuum exhaust valve 9. A pressure gauge 13 is installed on the steam cylinder 16, and a pressure gauge 13 is installed on the steam outlet pipe 26 between the safety valve 5 and the second needle valve 17 of the steam outlet pipe 26. A bellows compensator 12 is installed on the main steam pipe 19 between the two ball valves 1 of the main steam pipe 19. A vacuum exhaust valve 9 is installed on the steam outlet pipe 26 between the pressure gauge 13 and the second needle valve 17 of the steam outlet pipe 26.

[0015] The specific actual teaching demonstration process is as follows: compressed air is used to simulate steam, and tap water is used to simulate the condensed water generated during the steam transportation process. The compressed air pressure is 0.6Mpa, and the compressed air pressure is reduced to 0.35Mpa through the second pressure reducing valve 18, which is lower than the tap water pressure of 0.4Mpa, to ensure that tap water can enter the system pipeline. After the compressed air enters the pipeline, a bellows compensator 12 is set on the main steam pipe 19 to simulate the thermal expansion and contraction process in the actual transportation of the steam pipeline. Tap water and compressed air enter the steam-water separator 14 together, and the actual process of steam-water separation is simulated in the steam-water separator 14. The condensed water separated by the steam-water separator 14 is displayed through the transparent float trap 8 to show the actual drainage process. The compressed air after passing through the steam-water separator 14 is then decompressed and enters the steam heat exchanger 15, simulating the steam humidification and heat exchange processes respectively. The condensed water after heat exchange is discharged through the first dump bucket trap 6 and connected to the water collection pipe 2, completing the thermal system teaching demonstration of steam transportation, heat exchange, and condensed water discharge.

[0016] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermal system model for teaching demonstration, comprising: Ball valve (1), water collection pipe (2), first filter (3), first pressure reducing valve (4), safety valve (5), first dump bucket trap (6), second dump bucket trap (7), float trap (8), flow meter (10), first needle valve (11), steam-water separator (14), heat exchanger (15), steam cylinder (16), second needle valve (17), second pressure reducing valve (18), main steam pipe (19), first drain pipe (20), second drain pipe (21), third drain pipe (22), water inlet pipe (23), steam inlet pipe (24), The second filter (25) and the steam outlet pipe (26), the steam separator (14), the heat exchanger (15) and the steam sub-cylinder (16) are respectively fixed on the demonstration board, and are characterized in that: three ball valves (1) are installed on the steam sub-cylinder (16), the steam inlet pipe (24) is connected to one of the ball valves (1), the second pressure reducing valve (18) is installed on the steam inlet pipe (24), and the air pressure for demonstration is sent to the steam sub-cylinder (16), one end of the main steam pipe (19) is connected to the other ball valve (1), and the other end is connected to the inlet of the steam separator (14) through the ball valve (1), and the steam sub-cylinder The drain outlet of the steam separator (16) is connected to the water collecting pipe (2) through the first drain pipe (20), and the ball valve (1), the second drain bucket drain valve (7) and the ball valve (1) are installed in sequence on the first drain pipe (20); the water inlet pipe (23) is connected to the inlet of the steam separator (14), and the ball valve (1), the first needle valve (11) and the flow meter (10) are installed in sequence on the water inlet pipe (23); one end of the steam outlet pipe (26) is connected to the steam outlet of the steam separator (14), and the other end is connected to the steam inlet of the heat exchanger (15), and the first needle valve (11) and the flow meter (10) are installed in sequence on the steam outlet pipe (26) A filter (3), a first pressure reducing valve (4), a ball valve (1), a safety valve (5), a second needle valve (17) and a ball valve (1); the water outlet of the steam-water separator (14) is connected to the water collection pipe (2) through a third drain pipe (22); the ball valve (1), a second filter (25) and a floating ball drain valve (8) are sequentially installed on the third drain pipe (22); the water outlet of the heat exchanger (15) is connected to the water collection pipe (2) through a second drain pipe (21); the ball valve (1), a first dump bucket drain valve (6) and a ball valve (1) are sequentially installed on the second drain pipe (21).

2. The thermal system model for teaching demonstration as claimed in claim 1, characterized in that: It also includes a pressure gauge (13), a pressure gauge (13) is installed on the steam cylinder (16), and a pressure gauge (13) is installed on the steam outlet pipe (26) between the safety valve (5) and the second needle valve (17) of the steam outlet pipe (26).

3. The thermal system model for teaching demonstration as claimed in claim 2, characterized in that: It also includes: a bellows compensator (12), which is installed on the main steam pipe (19) between two ball valves (1) of the main steam pipe (19).

4. The thermal system model for teaching demonstration as claimed in claim 3, characterized in that: It also includes a vacuum exhaust valve (9), which is installed on the steam outlet pipe (26) between the pressure gauge (13) of the steam outlet pipe (26) and the second needle valve (17).

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