Multi-performance comprehensive experiment teaching platform for heating power inlet of heating system

Abstract

The utility model provides a multi-performance comprehensive experiment teaching platform for a heating power inlet of a heating system. The platform comprises a public pipeline, a pipe network platform and a monitoring system. The public pipeline comprises a radiator, an exhaust valve, a heater and a circulating water pump, and hot water in the radiator flows in and out to reflect temperature and pressure of an inlet and an outlet of the radiator in real time; a left float flowmeter, a left exhaust valve, a water tank, a circulating water pump and an electric heater are sequentially arranged on a public pipeline on the rear side of the pipe network platform, the left float flowmeter and a pipe section of the left float flowmeter are vertically arranged, the exhaust valve is installed at the top of a vertical pipe and used for exhaust work before circulation, and a horizontal pipe section is arranged between the top of the float flowmeter and the pipe section of the exhaust valve. The vertical pipe section where the left float flowmeter is located is connected with the vertical pipe section where the high-level water tank is located; the device is compact in structure, ingenious in design and easy to operate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of "heat supply engineering" test teaching, specifically points to a kind of small multifunctional high flexible heating system thermal inlet multi-performance test bench. BACKGROUND

[0002] "heat supply engineering" is an important professional course of college building environment and energy application engineering major, and the connection mode chapter of heat user and heat supply pipe network is important teaching link, and it is also the chapter content that student learns and understands difficultly, and its reason is that thermal inlet is often in building pipe well, and it is inconvenient to open and view;Theoretical knowledge learning is more abstract, and it is easy to lead to understanding on surface, cannot be understood and remembered deeply.If theory teaching and actual engineering visit are combined, the visual experience of student can be improved, but actual engineering often does not allow student to carry out on-site adjustment and operation, more cannot show the dynamic characteristic parameter of system in real time.Experimental teaching can be designed according to demand Condition, and local display and data acquisition of characteristic parameter are realized, so the importance of experimental teaching is obvious.

[0003] At present, there is no experimental bench for the teaching link in heat supply engineering experimental teaching, so that the combination of theory teaching and experimental teaching cannot be realized, and teaching effect cannot be improved. SUMMARY

[0004] The utility model patent aims at the above problem, and provides heating system thermal inlet multi-performance comprehensive experimental teaching platform, solves the problem that theory learning is abstract and theory teaching and experimental teaching are separated.

[0005] In order to realize the above purpose, the technical solution of the utility model is: heating system thermal inlet multi-performance comprehensive experimental teaching platform, including water tank, radiator, exhaust valve, float flowmeter, electric control cabinet, heater, water injector, regulating valve, circulating water pump, pressurized water pump, PVC pipeline, universal wheel, steel base support, pressure sensor, temperature sensor.

[0006] The heating system thermal inlet multi-performance comprehensive experimental teaching platform, including the public pipeline, the pipe network platform and the monitoring system. The pipe network platform left side, back side and right side pipe section are the public pipeline. The public pipeline includes radiator 2, exhaust valve 3, heater 6 and circulating water pump 9, wherein, the public pipeline of the pipe network platform left side is vertically placed a steel radiator 2, the hot water inlet and outlet in the radiator, the horizontal pipe section of the hot water inlet is respectively provided with left front pressure sensor 13 and left front temperature sensor 14, the outlet horizontal pipe section is provided with left rear pressure sensor 15 and left rear temperature sensor 16, which can real-time reflect the temperature and pressure of the radiator inlet and outlet; The public pipeline of the pipe network platform back side is sequentially provided with left float flow meter 17, left exhaust valve 18, water tank 1, circulating water pump 9 and electric heater 6, the left float flow meter 17 and the pipe section are vertically placed, and an exhaust valve 18 is arranged at the top of the vertical pipe for pre-circulation exhaust work, and a horizontal pipe section is arranged between the top of the float flow meter 17 and the middle position of the pipe section of the exhaust valve 18, which connects the vertical pipe section of the left float flow meter 17 and the vertical pipe section of the high water tank 1; The pressure setting point of the whole system is located at point A below the high water tank 1, and sequentially passes through the circulating water pump 9 and the electric heater 6 along the public pipeline and enters the right side pipeline of the experimental table; The pipe network platform right side contains right float flow meter 4, right exhaust valve 3, right front pressure sensor 20 and right front temperature sensor 21 along the water supply direction in the pipe, and the vertically placed pipe sections are fixed on the bottom steel support. The monitoring system includes float flow meter, temperature sensor and pressure sensor, which are arranged on the public pipeline.

[0007] In the heating system thermal inlet multi-performance comprehensive experimental teaching platform, the right rear pressure sensor 20 outlet and the left rear pressure sensor 14 inlet are connected by PVC pipeline, and the two end nodes are B and H, and three-way components are arranged at the two points. There is a pipe section CI inside the pipe network platform, which is parallel to the pipe section BH, and a water ejector 7 is arranged on the pipe section. The middle node G of the water ejector 7 has a pipe section EG which is perpendicular to the pipe section CI and extends to the inside of the pipe network platform. The middle node F of the pipe section EG has a pipe section FJ which is parallel to the pipe section GI and extends to the left side of the pipe network platform. The pipe section FJ is provided with a pressurized water pump 19, and the nodes J, I and H are located on the same straight line and connected by a pipe section. The nodes I and H are connected by a three-way component, and the node J is a elbow. The node E has a pipe section DE which is parallel to the pipe section CG and extends to the right side of the pipe network platform, and the other side D of the pipe section DE is a elbow. The nodes B, C and D are located on the same straight line and connected by a pipe section. The nodes B and C are connected by a three-way component. The adjusting valves 8, 81-85 are arranged on the pipe network platform. Among them, the first adjusting valve 8 is located on the pipe section AE, the second adjusting valve 81 is located on the pipe section BH, the third adjusting valve 82 is located on the pipe section CG, the fourth adjusting valve 83 is located on the pipe section DE, the fifth adjusting valve 84 is located on the pipe section FG, and the sixth adjusting valve 85 is located in front of the pressurized water pump 19 on the pipe section FJ.

[0008] The pipe network platform is mainly composed of PVC pipes and three-way pipes. The outermost pipe section BI at the front side of the pipe network platform is provided with a second regulating valve 81. A pipe CH parallel to the pipe section BI is connected in parallel with the pipe section BI, and a third regulating valve 82 is arranged on the pipe CH, and a water jet 7 is arranged at the middle position of the pipe CH. A pipe perpendicular to the pipe section CH is connected to the point E at the middle part of the water jet 7. The point E is directly connected with the constant pressure point A, and a first regulating valve 8 is arranged on the point A. Further inward of the pipe network platform, a group of pipes DEFH are connected in parallel with the pipe sections where the second regulating valve 81 and the third regulating valve 82 are arranged. A fourth regulating valve 83 is arranged on the pipe DE. A sixth regulating valve 85 and a pressurized water pump 19 are arranged in sequence on the pipe FH. A fifth regulating valve 84 is arranged on the pipe FG. The inlet and outlet of the three parallel pipes are all provided with a connecting pipe perpendicular to the horizontal pipe section on the plane. The inlet end connecting points are B, C and D, and the outlet end connecting points are I, H and J.

[0009] The aforementioned heating system thermal inlet comprehensive experiment teaching platform, the steel support 12 is the base of the entire experimental device, the small heating system is fixed on the base, the electrical control cabinet 5 is installed on the side surface of the base, and the electrical control cabinet 5 is used for controlling the electric heating device, the water pump and the like. The universal wheel 11 is installed below the base, the flexibility of the entire experimental table is improved, and the running conditions of each part can be quickly checked. The base increases the stereoscopic feeling and operability of the experimental table, and the base can be disassembled and more functional components can be added.

[0010] Compared with the prior art, the utility model has the advantages of compact structure and ingenious design, solves the problem that the actual heat user and the heating pipe network system are large and difficult to view and learn theoretically, and solves the problem that the problem is difficult to understand and remember. The experimental equipment is simple to operate, different working conditions can be realized by changing the opening state of different regulating valves in the experimental table, and the flexibility of the overall experimental table is high. The parameter output is displayed in real time by the sensor during the experiment, and the effect is intuitive and has strong visual experience. In addition, the experimental table does not have strict operation specifications, the experimental safety evaluation is high, students can freely adjust the experimental working condition, teachers can assist in experimental demonstration while teaching in the classroom, the abstract theory is concretized and clarified, the perceptual understanding of students is deepened, and the interest of students in theoretical learning is promoted.

[0011] The aforementioned heating system thermal inlet multi-function comprehensive experiment teaching platform is mainly divided into a heating system part, an auxiliary equipment part and a base part. The water tank is arranged at the highest position of the system and functions as a system pressure setting, and the pressure setting point is point A at the suction inlet of the circulating water pump. When in use, water is injected through the water injection port at the top of the water tank, and the amount of water injected should be referenced to the amount of water that can make the liquid level higher than 2 / 3 of the water tank. The radiator 2 is a general small steel radiator, simulating the heat users in the actual heating system. The exhaust valves are arranged above all the pipe sections and are used to exhaust the air in the system to avoid the phenomena of emptying, cavitation and the like in the system. The float flow meters are arranged on the water supply pipe section and the return water pipe section after the heat source and are used to observe the flow in each section and detect whether there is a water leakage problem in the pipe section. Before starting the experiment, the system is first emptied, the two exhaust valves and all the regulating valves are opened, the electrical equipment is closed, the water level in the water tank is kept higher than the height of the exhaust valve, until the exhaust valve is stationary, all the pipe sections are filled with water, the float flow meters on both sides have the same scale, and the emptying is completed. When the circulating water pump 9 is started, the liquid in the system that has been emptied circulates through the heater 6 and the radiator 2 in the direction indicated by the arrow. The heater 6 is an electric heater and is the heat source of the heating system. In order to protect the experimental table, the electric heater and the circulating water pump 9 always keep synchronous operation. Three sets of pressure sensors and temperature sensors are arranged to measure the pressure and temperature of the outlet of the heat source, the inlet of the radiator and the outlet of the radiator. The water injector 7 can pressurize the water in the pipe and send it into the radiator. Six regulating valves that are the same as the first regulating valve 8 are arranged, and by changing the opening and closing of different regulating valves, the connection of the heat users and the heating pipe network under different working conditions can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] In the figure: 1-water tank, 2-radiator, 3-right exhaust valve, 4-right float flow meter, 5-electric control cabinet, 6-heater, 7-water injector, 8-first regulating valve, 9-circulating water pump, 10-PVC pipe, 11-small universal wheel, 12-steel base support, 13-left front pressure sensor, 14-left front temperature sensor, 15-left rear pressure sensor, 16-left rear temperature sensor, 17-left float flow meter, 18-left exhaust valve, 19-pressurized water pump, 20-right front pressure sensor, 21-right front temperature sensor, 81-second regulating valve, 82-third regulating valve, 83-fourth regulating valve, 84-fifth regulating valve, 85-sixth regulating valve. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be further described below in combination with the drawings and specific embodiments.

[0015] The utility model experimental table includes water tank 1, radiator 2, right exhaust valve 3, right float flowmeter 4, electric control cabinet 5, heater 6, water injector 7, regulating valve 8, circulating water pump 9, PVC pipeline 10, small universal wheel 11, steel base support 12, left front pressure sensor 13, left front temperature sensor 14, left rear pressure sensor 15, left rear temperature sensor 16, left float flowmeter 17, left exhaust valve 18, pressurized water pump 19, right front pressure sensor 20, right front temperature sensor 21, regulating valve 81~85.

[0016] The foregoing heating system thermal inlet multi-performance comprehensive experimental teaching platform can realize simple and direct connection working conditions of the heat pipe network and the heat user.

[0017] On the basis of the foregoing experimental scheme, the utility model still can realize the following experimental scheme.

[0018] In an embodiment: realize the direct connection working condition of water injector. Adjust the foregoing experimental table, open the third regulating valve 82 and the fifth regulating valve 84, close the first regulating valve 8, the second regulating valve 81, the fourth regulating valve 83 and the sixth regulating valve 85, open the circulating water pump 9 and close the pressurized water pump 19. The water in the pipe is heated by the heater, and the hot water is sequentially passed through the heat source outlet right float flowmeter 4, the right front pressure sensor 20 and the right front temperature sensor 21 under the action of the circulating water pump, and is sent into the radiator after the water injector, and the conveying capacity is enhanced. The total circulation process is A-B-C-G-H-I-A.

[0019] In an embodiment: realize the pressurized working condition of pump series connection. Adjust the foregoing experimental table, open the fourth regulating valve 83 and the sixth regulating valve 85, close the first regulating valve 8, the second regulating valve 81, the third regulating valve 82 and the fifth regulating valve 84, and open the circulating water pump 9 and the pressurized water pump 19. The water in the pipe is heated by the heater, and the hot water is sequentially passed through the heat source outlet right float flowmeter 4, the right front pressure sensor 20 and the right front temperature sensor 21 under the action of the circulating water pump, and is sent into the radiator under the action of the pressurized water pump 19 through the third regulating valve 83 and the sixth regulating valve 85. When two water pumps are connected in series, the hot water obtains greater lift. The total circulation process is A-B-C-D-E-F-H-I-A.

[0020] In one embodiment: the direct connection working condition of the water mixing pump is realized. The aforementioned experimental table is adjusted, the first regulating valve 8, the second regulating valve 81 and the sixth regulating valve 85 are opened, the third regulating valve 82, the fourth regulating valve 83 and the fifth regulating valve 84 are closed, and the circulating water pump 9 and the pressurizing water pump 19 are opened. The backwater of the system is divided into two parallel branches at point A, wherein part of the backwater passes through the heater to become hot supply water and flows in the pipeline where the second regulating valve 81 is located, and the flow process is A-B-I; another part of the backwater flows along A-E-F-H-I by the pressurizing water pump 19, and the hot supply water passing through the heater is mixed at point I to be sent into the heat user, thereby playing a function of adapting to load changes.

Claims

1.A comprehensive experimental teaching platform for multiple performance of heating system heat inlet, characterized in that: it comprises a public pipeline, a pipe network platform and a monitoring system; the public pipeline comprises a radiator, an exhaust valve, a heater and a circulating water pump, wherein the public pipeline on the left side of the pipe network platform is vertically placed with a steel radiator, hot water flows into and out of the radiator, a left front pressure sensor and a left front temperature sensor are respectively arranged on the horizontal pipe segment at the hot water inlet of the radiator, a left rear pressure sensor and a left rear temperature sensor are arranged on the outlet horizontal pipe segment, a left float flow meter, a left exhaust valve, a water tank, a circulating water pump and an electric heater are sequentially arranged on the public pipeline on the back side of the pipe network platform, the left float flow meter is vertically placed with the pipe segment, an exhaust valve is arranged at the top of the vertical pipe for exhaust work before circulation, a horizontal pipe segment is arranged at the middle position of the pipe segment between the top of the float flow meter and the exhaust valve, connecting the vertical pipe segment where the left float flow meter is located and the vertical pipe segment where the high-level water tank is located; the pressure setting point of the whole system is located at point A directly below the high-level water tank, sequentially passing through the circulating water pump and the electric heater along the public pipeline and entering the pipeline on the right side of the experimental table; the right side of the pipe network platform comprises a right float flow meter, a right exhaust valve, a right front pressure sensor and a right front temperature sensor along the water supply direction in the pipe; the outlet of the right rear pressure sensor and the inlet of the left rear pressure sensor are connected by a PVC pipeline, the two end nodes are B and H, three-way components are arranged at the two points; there is a pipe segment CI parallel to the pipe segment BH inside the pipe network platform, a water ejector is arranged on the pipe segment, the middle node G of the water ejector has a pipe segment EG perpendicular to the pipe segment CI towards the inside of the pipe network platform; the middle node F of the pipe segment EG has a pipe segment FJ parallel to GI towards the left side of the pipe network platform, a pressurized water pump is arranged on the pipe segment FJ, the nodes J, I and H are located on the same straight line, connected by a pipe segment, the points I and H are connected by a three-way component, and the node J is a bend; the node E has a pipe segment DE parallel to the pipe segment CG towards the right side of the pipe network platform, the other side D is a bend, the nodes B, C and D are located on the same straight line and connected by a pipe segment, the points B and C are connected by a three-way component; the first regulating valve is arranged on the pipe segment AE, the second regulating valve is arranged on the pipe segment BH, the third regulating valve is arranged on the pipe segment CG, the fourth regulating valve is arranged on the pipe segment DE, the fifth regulating valve is arranged on the pipe segment FG, and the sixth regulating valve is arranged before the pressurized water pump on the pipe segment FJ; the outermost pipe segment BI on the front side of the pipe network platform is provided with the second regulating valve, the pipe segment CH parallel to the pipe segment BI inside is connected in parallel with the pipe segment BI, the third regulating valve is arranged thereon and a water ejector is arranged at the middle position, a pipe segment perpendicular to the pipe segment CH is connected to the point E at the middle of the water ejector, the point E is directly connected with the pressure setting point A and provided with the first regulating valve thereon; there is a group of pipe segments DEFH inside the pipe network platform, which are connected in parallel with the pipe segments where the second regulating valve and the third regulating valve are located, the fourth regulating valve is arranged on the pipe segment DE, the sixth regulating valve and the pressurized water pump are sequentially arranged on the pipe segment FH, and the fifth regulating valve is arranged on the pipe segment FG; the inlet and outlet of the three parallel pipe segments each have a connecting pipe perpendicular to the horizontal pipe segment in the plane, the connection points of the inlets are B, C and D, and the connection points of the outlets are I, H and J. ​ 2. The platform of claim 1, wherein: The steel support is the base of the whole experimental device, the heating system is fixed on the base, the electric control cabinet is installed on the side of the base to control the electric heater and water pump, and universal wheels are installed below the base.

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