Platform for testing thermal insulation performance of pipeline

Abstract

The utility model discloses a platform for testing the thermal insulation performance of a pipeline, which comprises a pressurizing water supply mechanism, a primary circulation thermal insulation mechanism and a testing mechanism, the testing mechanism is connected to a circulation pipeline of the primary circulation thermal insulation mechanism, the pressurizing water supply mechanism is connected with the primary circulation thermal insulation mechanism, and the primary circulation thermal insulation mechanism is connected with the testing mechanism. The main line circulation heat preservation mechanism comprises a circulation pipeline, a circulation pump, a flow meter, a pressure sensor, a pressure stabilizing water tank, an exhaust valve and a resistance type temperature sensor are arranged on the circulation pipeline, the water inlet tank is connected with the circulation pipeline through a water inlet pipe, and a booster pump and a water inlet valve are arranged on the water inlet pipe. The testing mechanism comprises a buried pipe, a wall-embedded pipe, an exposed pipe, temperature sensors and ball valves. The temperature sensors and the ball valves are arranged at the two ends of the testing pipe. According to the utility model, the performance difference of heat loss of the pipeline under the condition of different installation modes can be verified, and meanwhile, the change of heat loss after heat insulation treatment of the pipeline can be compared.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline performance test technical field, especially a platform for testing pipeline heat preservation performance. BACKGROUND

[0002] At present, the decoration mode of PP-R pipe mainly has wall-embedded and buried two modes, and the heat preservation modes mainly have polyurethane coating, rubber and plastic cotton and aluminum foil three modes, but at present, there is no big platform to carry out pipeline temperature monitoring and measure temperature loss of three heat preservation modes, and each test platform can only test one pipeline heat preservation performance. UTILITY MODEL CONTENTS

[0003] In view of the above problems, the utility model aims at providing a platform for testing pipeline heat preservation performance to solve the problem of measuring temperature loss of pipeline under different installation modes.

[0004] The technical problem solved by the utility model can be realized by the following technical scheme: a platform for testing pipeline heat preservation performance, including booster feed water mechanism, dry road circulation heat preservation mechanism and test mechanism, the test mechanism is connected on the circulation pipeline of dry road circulation heat preservation mechanism, and the booster feed water mechanism is connected with the dry road circulation heat preservation mechanism.The dry road circulation heat preservation mechanism includes circulation pipeline, circulating pump, flowmeter, pressure sensor, exhaust valve, resistance type temperature sensor and heating branch, and the circulation pipeline is provided with circulating pump, flowmeter, pressure sensor, exhaust valve, heating branch and resistance type temperature sensor.

[0005] The booster feed water mechanism includes water inlet tank, water inlet pipe, booster pump, water inlet valve and check valve, the water inlet tank is connected with the circulation pipeline of dry road circulation heat preservation mechanism through water inlet pipe, and the water inlet pipe is provided with booster pump and water inlet valve.

[0006] The heating branch includes water heater, branch pipe, water heater ball valve and temperature sensor, both ends of the branch pipe are connected with the circulation pipeline, the water heater is arranged on the branch pipe, and both ends of the water heater are provided with temperature sensor and water heater ball valve.

[0007] The circulation pipeline is provided with pressure stabilizing water tank.

[0008] The test mechanism includes buried pipe, wall-embedded pipe, exposed pipe, temperature sensor and ball valve, the buried pipe, wall-embedded pipe and exposed pipe are connected in parallel, and the buried pipe, wall-embedded pipe and exposed pipe are connected on the circulation pipeline of dry road circulation heat preservation mechanism, and both ends of the buried pipe, wall-embedded pipe and exposed pipe are provided with temperature sensor and ball valve.

[0009] Each temperature sensor is connected with heat recorder.

[0010] The length of the buried pipe, the embedded wall pipe and the exposed pipe is 1m.

[0011] The length of the circulating pipeline is 40m, and an electric resistance type temperature sensor is arranged on the circulating pipeline every 4m.

[0012] The water outlet pipe is connected between the dry circuit circulating mechanism and the water inlet tank of the pressurized water supply mechanism, and a pressure relief valve is arranged on the water outlet pipe.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model can measure the heat loss change of the pipeline, verify the performance difference of the heat loss of the pipeline under different installation conditions, and can compare the heat loss change after the pipeline is treated with heat preservation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] In the figure: 1-pressurized pump, 2-water inlet valve, 3-water heater ball valve, 4-temperature sensor, 5-water heater, 6-pressure sensor, 7-circulating pump, 8-flow meter, 9-stable pressure water tank, 10-exhaust valve, 11-pressure relief valve, 12-heat recorder, 13-check valve, 14-electric resistance type temperature sensor, 15-water inlet tank, 16-buried pipe, 17-embedded wall pipe, 18-exposed pipe. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific drawings.

[0017] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end", "length", "outer end" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0018] In combination with the drawings, Figure 1 The embodiment discloses a platform for testing the heat preservation performance of a pipeline, which comprises a pressurized water supply mechanism, a dry circuit circulating heat preservation mechanism and a testing mechanism, the testing mechanism is connected to the circulating pipeline of the dry circuit circulating heat preservation mechanism, and the pressurized water supply mechanism is connected to the dry circuit circulating heat preservation mechanism.

[0019] The booster feed water mechanism comprises a water inlet tank 15, a water inlet pipe, a variable frequency booster pump 1, a water inlet valve 2 and a check valve 13, the water inlet tank 15 is connected with the circulating pipeline of the dry circuit circulating heat preservation mechanism through the water inlet pipe, and the booster pump 1 and the water inlet valve 2 are arranged on the water inlet pipe.

[0020] The dry circuit circulating mechanism is connected with the water inlet tank of the booster feed water mechanism through a water outlet pipe, and the water outlet pipe is provided with a pressure relief valve 11 for water discharge and pressure relief.

[0021] The dry circuit circulating heat preservation mechanism comprises a circulating pipeline, a circulating pump 7, a flow meter 8, a pressure stabilizing tank 9, a pressure sensor 6, an exhaust valve 10, a resistance type temperature sensor 14 and a heating branch, the circulating pipeline is provided with the circulating pump 7, the flow meter 8, the pressure sensor 6, the pressure stabilizing tank 9, the exhaust valve 10, the heating branch and the resistance type temperature sensor 14.

[0022] The heating branch comprises a water heater 5, a branch pipe, a water heater ball valve 3 and a temperature sensor 4, both ends of the branch pipe are connected with the circulating pipeline, the water heater 5 is arranged on the branch pipe, both ends of the water heater 5 are provided with the temperature sensor 4 and the water heater ball valve 3, and two temperature sensors 4 measure the water outlet temperature of the water heater and the temperature of backflow water after pipeline circulation respectively.

[0023] The test mechanism comprises a buried pipe 16, an embedded wall pipe 17, an exposed pipe 18, temperature sensors 4 and ball valves, the buried pipe 16, the embedded wall pipe 17 and the exposed pipe 18 are connected with the circulating pipeline of the dry circuit circulating heat preservation mechanism, and the two ends of the buried pipe 16, the embedded wall pipe 17 and the exposed pipe 18 are provided with the temperature sensors 4 and the ball valves.

[0024] The buried pipe 16 and the embedded wall pipe 17 have a replacement surface, and are filled with cement mortar without being laid with bricks. When the thermal insulation material is replaced, the cement mortar is first dug out, the thermal insulation material is then wrapped, and the cement mortar is filled again for testing. The polyurethane coating, rubber plastic cotton and aluminum foil can be replaced back and forth.

[0025] Heat loss test principle: the heat loss Q=3.6 G×c(t1-t2) is calculated by measuring the pipe temperature at both ends of the test pipeline and collecting the flow meter parameters, wherein Q is heat, G is flow, c is specific heat capacity, and (t1-t2) is the temperature difference between the supply and return water. The heat is calculated through the parameters and presented in the heat recorder 12.

[0026] The operation method of the utility model: open the booster pump 1 to carry out pipeline pressurization to 0.3MPa, and open the exhaust valve 10, then close the water inlet valve 2 and open the circulating pump 7 to circulate, open the water heater ball valve 3, and the water heater 5 heats to reach the specified stability, then close the water heater ball valve 3, and the water heater 5 does not provide heating any more; test for 24 hours, measure the flow and temperature change of the circulating pipeline, and obtain the heat loss of the circulating pipeline when not tested; wrap the thermal insulation material on the pipeline to be tested, open the ball valves at both ends of the pipeline to be tested, and test the heat loss of the test pipeline one by one (the initial temperature remains the same during the test).

[0027] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification, equivalent change or modification made according to the technical principle of the utility model to the above embodiment still belongs to the scope of the technical solution of the utility model.

Claims

1. A platform for testing pipe insulation performance, comprising a pressurized water feed mechanism, a dry run circulation insulation mechanism and a testing mechanism, characterized in that: The test mechanism is connected to the circulating pipeline of the dry circuit circulating and heat preservation mechanism, the pressurized water supply mechanism is connected to the dry circuit circulating and heat preservation mechanism, the dry circuit circulating and heat preservation mechanism comprises a circulating pipeline, a circulating pump (7), a flow meter (8), a pressure sensor (6), an exhaust valve (10), a resistance type temperature sensor (14) and a heating branch, and the circulating pipeline is provided with the circulating pump (7), the flow meter (8), the pressure sensor (6), the exhaust valve (10), the heating branch and the resistance type temperature sensor (14).

2. The platform for testing the thermal performance of a pipe of claim 1, wherein: The pressurized water supply mechanism comprises a water inlet tank (15), a water inlet pipe, a pressurized pump (1), a water inlet valve (2) and a check valve (13), the water inlet tank (15) is connected to the circulating pipeline of the dry circuit circulating and heat preservation mechanism through the water inlet pipe, and the water inlet pipe is provided with the pressurized pump (1) and the water inlet valve (2).

3. The platform for testing pipe insulation performance according to claim 1, wherein: The heating branch comprises a water heater (5), a branch pipe, a water heater ball valve (3) and a temperature sensor (4), both ends of the branch pipe are connected to the circulating pipeline, the water heater (5) is arranged on the branch pipe, and both ends of the water heater (5) are provided with the temperature sensor (4) and the water heater ball valve (3).

4. The platform for testing pipe insulation performance of claim 1, wherein: The circulating pipeline is provided with a pressure stabilizing water tank (9).

5. The platform for testing pipe insulation performance of claim 1, wherein: The test mechanism comprises a buried pipe (16), an embedded pipe (17) and an exposed pipe (18), the buried pipe (16), the embedded pipe (17) and the exposed pipe (18) are connected to the circulating pipeline of the dry circuit circulating and heat preservation mechanism, and the buried pipe (16), the embedded pipe (17) and the exposed pipe (18) are provided with the temperature sensor (4) and the ball valve at both ends.

6. A platform for testing the thermal performance of a pipe according to claim 5, wherein: Each temperature sensor (4) is connected to a heat recorder (12).

7. The platform for testing pipe insulation performance of claim 5, wherein: The lengths of the buried pipe (16), the embedded pipe (17) and the exposed pipe (18) are all 1 m.

8. The platform for testing pipe insulation performance of claim 1, wherein: The length of the circulating pipeline is 40 m, and the resistance type temperature sensor (14) is arranged on the circulating pipeline every 4 m.

9. The platform for testing pipe insulation performance of claim 1, wherein: The dry circuit circulating and heat preservation mechanism is connected to the water outlet pipe between the water inlet tank of the pressurized water supply mechanism, and the water outlet pipe is provided with a pressure relief valve (11).

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