Exhaust testing device

Abstract

The invention discloses an exhaust testing device. The exhaust testing device comprises a circulating system, an inflation metering assembly and an exhaust metering assembly. And the inflation metering assembly and the exhaust metering assembly are communicated with the circulating system. The circulating pipeline comprises a pressure gauge, a flow meter, a regulating valve and a circulating pump which are connected through the circulating pipeline; the device further comprises a vacuum degasser, an expansion tank and a water injection assembly for injecting fluid into the circulating system. The inflating metering assembly comprises a first water accumulating basin filled with water, a first measuring cylinder inversely buckled in the water in the first water accumulating basin, an exhaust pipe and an inflating pump; the exhaust metering assembly comprises a second water accumulation basin filled with water and a second measuring cylinder which is inversely buckled in the water in the second water accumulation basin; the exhaust valve is communicated with the circulating pipeline; an exhaust port of the exhaust valve is communicated with the inner cavity of the second measuring cylinder through an exhaust pipe; and an exhaust port of the vacuum degasser is communicated with the inner cavity of the second measuring cylinder through an exhaust pipe. The device can be used for better testing the exhaust performance of the exhaust valve under different working conditions of the water circulation system.

Description

Technical Field

[0001] The invention relates to the technical field of heating, ventilation and air conditioning systems, in particular to an exhaust gas testing device. Background Art

[0002] The domestic standards for measuring HVAC automatic exhaust valves are mainly "GB / T 36523-2018 Composite High-Speed ​​Exhaust Inlet Valve for Water Supply Pipes" and "JB / T 12386-2015 Inlet and Exhaust Valves for Water Supply Pipes".

[0003] The former is mainly applicable to large pipeline systems such as municipal ones, but not to HVAC pipeline systems; the latter is applicable to HVAC pipeline systems, but the test method of exhaust volume in its test standard is the same as the former. It only considers one parameter of exhaust volume, and does not consider many complex factors such as different installation positions, different pressures, different flow rates, different pipeline flow states, different bubble sizes, etc.

[0004] Therefore, the national standard test method does not simulate the actual operating conditions of the HVAC pipeline. Although this method is relatively simple, it is also relatively rough and cannot accurately reflect the actual exhaust capacity of the exhaust valve under the actual operating conditions of the HVAC pipeline.

[0005] To clarify the exhaust performance of various exhaust valves, we have developed an exhaust valve capacity measurement device to comprehensively test the exhaust performance of various exhaust valves. In addition to testing the exhaust performance of exhaust valves, this device can also test the degassing capacity of vacuum degassers. Summary of the Invention

[0006] The purpose of the present invention is to provide an exhaust testing device to solve the technical problem that existing measuring devices cannot measure the exhaust performance of HVAC exhaust valves under different working conditions. The present invention has a simple structure and can better test the exhaust performance of exhaust valves.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An exhaust test device includes a circulation system, an air injection metering component, and an exhaust metering component; the air injection metering component and the exhaust metering component are connected to the circulation system;

[0009] The circulation pipeline includes a pressure gauge, a flow meter, a regulating valve and a circulation pump connected through the circulation pipeline; the pressure gauge, flow meter, regulating valve and circulation pump are connected to form a closed loop through the circulation pipeline; the circulation pipeline also includes a vacuum degasser, an expansion tank and a water injection assembly for injecting fluid into the circulation system; the vacuum degasser and the expansion tank are connected to the circulation pipeline; the water injection assembly includes a pressure pump connected to the circulation pipeline, and the pressure pump is connected to an external water source;

[0010] The air-inflating and metering assembly includes a first water basin filled with water, a first graduated cylinder placed upside down in the water in the first water basin, an air extraction pipe connected to the inner cavity of the first graduated cylinder, and an air pump that extracts air in the first graduated cylinder into the circulation pipeline through the air extraction pipe; the air extraction pump is connected to the circulation pipeline;

[0011] The exhaust metering assembly includes a second water basin filled with water and a second measuring cylinder inverted in the water in the second water basin;

[0012] It also includes an exhaust valve connected to the circulation pipeline; the exhaust port of the exhaust valve and the inner cavity of the second measuring cylinder and the exhaust port of the vacuum degasser and the inner cavity of the second measuring cylinder are connected through an exhaust pipe.

[0013] Furthermore, the exhaust valve is a horizontal pipeline exhaust valve, which is installed in a horizontal pipeline section of the circulation pipeline.

[0014] Furthermore, the exhaust valve is a top exhaust valve, which is installed at the highest point of the circulation system.

[0015] Furthermore, the exhaust valve is a vertical pipeline exhaust valve, which is installed in the vertical pipeline section of the circulation pipeline.

[0016] Furthermore, the circulation pipeline is a transparent pipeline.

[0017] Furthermore, the circulation pipeline is also provided with a thick pipe section for observing bubbles.

[0018] Furthermore, the air pump injects gas into the circulation pipeline through an air inlet provided on the circulation pipeline;

[0019] The air inlet, expansion tank, vacuum degasser and exhaust valve are distributed in sequence along the circulation pipeline.

[0020] Compared with the prior art, the present invention provides an exhaust gas testing device with the following beneficial effects:

[0021] The exhaust test device in this invention can simulate a real HVAC water circulation system and test the exhaust performance of exhaust valves under different operating conditions. During operation, we can compare the air volume at one atmosphere of pressure with the exhaust volume at one atmosphere of pressure, clearly and quantitatively measuring the exhaust performance of various exhaust valves under different operating conditions.

[0022] In addition, the testing device of the present invention can not only be used to test the exhaust performance of the exhaust valve, but also can be used to test the degassing capacity of the vacuum degasser. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the exhaust test device equipped with a horizontal pipeline exhaust valve in the present invention.

[0024] Figure 2 It is a structural schematic diagram of the exhaust test device equipped with a top exhaust valve in the present invention.

[0025] Figure 3 It is a structural schematic diagram of the exhaust testing device equipped with a vertical pipeline exhaust valve in the present invention.

[0026] Figure 4 It is a schematic diagram of the connection structure of the inflation metering component.

[0027] Figure 5 It is a schematic diagram of the connection structure between the exhaust metering component and the horizontal pipeline exhaust valve.

[0028] Figure 6 is Figure 1 Schematic diagram of the circulation system structure after removing the inflation metering component, exhaust metering component and other components.

[0029] In the picture:

[0030] 1-pressure pump, 2-pressure gauge, 3-flow meter, 4-regulating valve, 5-circulating pump, 6-circulating pipeline, 7-vacuum degasser, 8-vacuum degasser connecting pipe, 9-expansion tank, 10-air pump, 11-air inlet setting, 12-first graduated cylinder, 13-first water basin, 14-exhaust hose, 15-second graduated cylinder, 16-second water basin, 17-thick pipe section, 18-water inlet hose, 19-third water basin, 20-horizontal pipeline exhaust valve, 21-top exhaust valve, 22-vertical pipeline exhaust valve, 23-first exhaust hose, 24-second exhaust hose, 25-third exhaust hose, 26-fourth exhaust hose, 27-first graduated cylinder cavity, 28-second graduated cylinder cavity, 29-drain valve, 30-water. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] like Figure 1-6 As shown, the present invention provides an exhaust testing device, which includes a circulation system, an air injection metering component and an exhaust gas metering component; the air injection metering component and the exhaust gas metering component are connected to the circulation system.

[0033] like Figure 4 FIG2 is a schematic diagram of the connection structure of the air metering assembly. The air metering assembly is used to inject a certain amount of air into the circulation system.

[0034] Figure 5 shows a schematic diagram of the connection structure between the exhaust metering assembly and the horizontal pipeline exhaust valve. The exhaust metering assembly is used to collect and measure the air exhausted from the exhaust port of the exhaust valve or the exhaust port of the vacuum degasser.

[0035] Through the circulation system, it is possible to simulate the actual situation of pipeline water circulation under different working conditions (such as the pipeline water circulation state under different pressures, different flow rates, different bubble sizes, etc.). Since the vacuum degasser 7 and the exhaust valve are connected to the pipeline of the circulation system, the purpose of testing the exhaust valve and the exhaust volume of the vacuum degasser under different working conditions can be achieved.

[0036] Specifically, if Figure 1-3 As shown, the circulation system includes a pressure gauge 2, a flow meter 3, a regulating valve 4, and a circulation pump 5 connected by a circulation pipeline 6. The pressure gauge 2, flow meter 3, regulating valve 4, and circulation pump 5 are connected to the circulation pipeline 6 to form a closed loop. The system also includes a vacuum degasser 7, an expansion tank 9, and a water injection assembly for injecting fluid into the circulation system. The vacuum degasser 7 and expansion tank 9 are connected to the circulation pipeline 6. The water injection assembly includes a pressure pump 1 connected to the circulation pipeline 6 and connected to an external water source.

[0037] The circulation line 6 is used to connect the various components of the circulation system to form a fluid pathway and is composed of multiple sections of transparent tubing. In this embodiment, the circulation line 6 is transparent and made of transparent, high-strength UPVC material, allowing for intuitive observation of the flow, accumulation, and discharge of bubbles within the line.

[0038] The circulation pump 5 serves as a power source for promoting the flow of fluid in the circulation system and can be used to simulate an air conditioning circulation pump.

[0039] The pressure gauge 2 is used to monitor the system pressure parameters; the flow meter 3 is used to observe the flow rate of the pipeline, such as a float flow meter.

[0040] The regulating valve 4 is used to control the flow rate. Since the diameter of the pipeline is fixed, it is also used to control the flow rate.

[0041] The expansion tank 9 is used to absorb the water in the pipeline during inflation.

[0042] The pressure pump 1 is used to pressurize the pipeline and introduce water into the circulation pipeline.

[0043] In this embodiment, one end of the pump 1 is connected to the circulation line 6 via a pipe, and the other end is connected to the water in the third water basin 19 via a water inlet hose 18. Through the pump 1 and the connecting pipe, the water in the third water basin 19 is pumped into the circulation line 6. Then, driven by the circulation pump 5, the pumped water circulates in the circulation system.

[0044] like Figure 4As shown, in this embodiment, the air metering assembly includes a first water basin 13 filled with water, a first measuring cylinder 12 inverted in the water in the first water basin 13, an air extraction pipe connected to the air in the inner cavity of the first measuring cylinder 12, and an air pump 10 (for example, a variable frequency air pump can be selected to better control the air injection speed) that extracts the air in the first measuring cylinder 12 into the circulation pipeline through the air extraction pipe; the air pump 10 is connected to the circulation pipeline 6. Figure 4 As shown, the lower port of the first measuring cylinder 12 does not contact the bottom of the first water basin 13, and the first measuring cylinder 12 cannot be moved in the up and down directions (for example, a clamp is used to clamp the body of the first measuring cylinder 12 so that its position is locked and cannot be displaced). In addition, the air pump 10 is connected to the air in the inner cavity 27 of the first measuring cylinder through the air suction hose 14. After the air pump 10 is started, the air in the inner cavity 27 of the first measuring cylinder will be extracted through the air suction pipe (i.e., the air suction hose 14), and finally injected into the circulation pipeline 6 and mixed with the water in the circulation pipeline 6. When the air in the inner cavity 27 of the first measuring cylinder (i.e., the inner cavity of the first measuring cylinder) is extracted through the air suction hose 14, the water level in the inner cavity 27 of the first measuring cylinder will rise. The volume of air injected into the circulation pipeline 6 can be obtained and controlled by the difference in the water level before and after. Thus, the purpose of injecting a certain amount of air into the circulation system is achieved by the air metering component.

[0045] like Figure 5 As shown in FIG. 1 , in this embodiment, the exhaust metering assembly includes a second water basin 16 filled with water and a second measuring cylinder 15 inverted in the water in the second water basin 16. Figure 5 As shown, the lower end of the second measuring cylinder 15 does not contact the bottom of the second water basin 16, and the second measuring cylinder 15 cannot move in the vertical direction (for example, a clamp is used to clamp the body of the second measuring cylinder 15 so that its position is locked and cannot be moved).

[0046] Preferably, if Figure 1-3 As shown, the air pump 10 injects gas into the circulation pipeline 6 through the air inlet provided on the circulation pipeline 6; the air inlet, the expansion tank 9, the vacuum degasser 7 and the exhaust valve are distributed in sequence along the circulation pipeline 6.

[0047] Preferably, we also provide a water outlet on the circulation line 6, which is connected to a drain valve 29. When the drain valve 29 is opened, the water in the circulation line 6 can be discharged through the water outlet.

[0048] Preferably, the circulation line 6 also includes an observation section for observing bubbles, namely a thick section 17. This thick section 17 is a thickened section used to reduce the flow rate and observe the flow of bubbles. Compared to the diameter of the thick section 17, the diameter of other parts of the circulation line 6 is smaller.

[0049] We can connect the exhaust port of the exhaust valve to the inner cavity of the second graduated cylinder 15 through an exhaust pipe, and also connect the exhaust port of the vacuum degasser 7 to the inner cavity of the second graduated cylinder 15. When air enters the inner cavity 28 of the second graduated cylinder (i.e., the inner cavity of the second graduated cylinder) through the exhaust pipe, the water level in the inner cavity 28 of the second graduated cylinder will drop. The volume of air discharged into the inner cavity 28 of the second graduated cylinder can be obtained by the difference in water level.

[0050] The operating principle of this test device is as follows: A circulating system simulates the operation of a water cycle. In this fixed-pressure water circulation system, a fixed amount of air at 1 atmosphere is pumped in using an air pump 10 (measured by a first graduated cylinder 12). This air passes through an exhaust valve or vacuum degasser 7, where some is stored in the valve cavity and some is discharged from the circulation system. After passing through the exhaust pipe, the amount of discharged air is measured using a second graduated cylinder 15 (also at 1 atmosphere). This allows for the degassing performance of the test object (vacuum degasser 7 or drain valve) over a specified period of time, simulating the actual water circulation in the pipeline.

[0051] In this embodiment, the first measuring cylinder 12 and the second measuring cylinder 15 are both glass measuring cylinders with scales.

[0052] During the test, we can choose to quantitatively measure the exhaust volume of the exhaust valve, followed by the exhaust volume of the vacuum degasser, under realistic conditions simulating water circulation in the pipeline. When measuring the exhaust volume of the exhaust valve, connect the exhaust port of the exhaust valve to the inner cavity 28 of the second graduated cylinder, while disconnecting the exhaust port of the vacuum degasser 7 from the inner cavity 28 of the second graduated cylinder. When measuring the exhaust volume of the vacuum degasser, connect the exhaust port of the vacuum degasser 7 to the inner cavity 28 of the second graduated cylinder, while disconnecting the exhaust port of the exhaust valve from the inner cavity 28 of the second graduated cylinder.

[0053] Preferably, the specific type and installation location of the exhaust valve connected to the circulation system can be selected according to needs, so that the exhaust performance of exhaust valves of different types and in different installation locations can be tested. In this embodiment, the horizontal pipe exhaust valve 20, the top exhaust valve 21, or the vertical pipe exhaust valve 22 are respectively connected to the circulation system.

[0054] like Figure 1 As shown, it is a structural diagram of an exhaust test device equipped with a horizontal pipeline exhaust valve 20. Figure 1 This structure enables quantitative testing of the exhaust volume of the horizontal pipeline exhaust valve 20 and the vacuum degasser 7. The exhaust port of the horizontal pipeline exhaust valve 20 is connected to the inner cavity 28 of the second measuring cylinder via a first exhaust hose 23. The vacuum degasser 7 is connected to the inner cavity 28 of the second measuring cylinder via a second exhaust hose 24.

[0055] like Figure 2The figure shows the structure of the exhaust test device equipped with a vertical pipe exhaust valve 22. Figure 2 The structure can realize the quantitative test of the exhaust volume of the vertical pipeline exhaust valve 22 and the exhaust volume of the vacuum degasser 7. The exhaust port of the vertical pipeline exhaust valve 22 and the inner cavity 28 of the second measuring cylinder can be connected through the third exhaust hose 25.

[0056] like Figure 3 The figure shows the structure of the exhaust test device equipped with the top exhaust valve 21. Figure 3 The structure can realize quantitative testing of the exhaust volume of the top exhaust valve 21 and the exhaust volume of the vacuum degasser 7. The exhaust port of the top exhaust valve 21 and the inner cavity 28 of the second measuring cylinder can be connected through the fourth exhaust hose 26.

[0057] In this embodiment, the horizontal pipe exhaust valve 20 is a microbubble exhaust valve installed in the horizontal pipe section of the circulation pipe 6; the vertical pipe exhaust valve 22 is a microbubble exhaust valve installed in the vertical pipe section of the circulation pipe 6; the top exhaust valve 21 is an exhaust valve installed at the highest point of the circulation system. Figure 1-3 As shown, the top exhaust valve 21 in this embodiment is installed at the upper left corner of the entire circulation system.

Claims

1. An exhaust testing device, characterized in that: It includes a circulation system, an air-inflating metering component and an exhaust-exhaust metering component; the air-inflating metering component and the exhaust-exhaust metering component are connected to the circulation system; The circulation pipeline comprises a pressure gauge (2), a flow meter (3), a regulating valve (4) and a circulation pump (5) connected via the circulation pipeline (6); the pressure gauge (2), the flow meter (3), the regulating valve (4) and the circulation pump (5) are connected to form a closed loop via the circulation pipeline (6); the circulation pipeline further comprises a vacuum degasser (7), an expansion tank (9) and a water injection assembly for injecting fluid into the circulation system; the vacuum degasser (7) and the expansion tank (9) are in communication with the circulation pipeline (6); the water injection assembly comprises a pressure pump (1) in communication with the circulation pipeline (6), and the pressure pump (1) is in communication with an external water source; The air pumping and metering assembly comprises a first water basin (13) filled with water, a first measuring cylinder (12) placed upside down in the water in the first water basin (13), an air extraction pipe communicating with the inner cavity of the first measuring cylinder (12), and an air pump (10) for extracting air in the first measuring cylinder (12) into the circulation pipeline through the air extraction pipe; the air pump (10) is communicated with the circulation pipeline (6); The exhaust metering assembly comprises a second water basin (16) filled with water and a second measuring cylinder (15) placed upside down in the water in the second water basin (16); It also includes an exhaust valve connected to the circulation pipeline (6); the exhaust port of the exhaust valve and the inner cavity of the second measuring cylinder (15) and the exhaust port of the vacuum degasser (7) and the inner cavity of the second measuring cylinder (15) are connected through an exhaust pipe.

2. An exhaust gas testing device according to claim 1, characterized in that: The exhaust valve is a horizontal pipeline exhaust valve (20), which is installed in the horizontal pipeline section of the circulation pipeline (6).

3. The exhaust gas testing device according to claim 1, characterized in that: The exhaust valve is a top exhaust valve (21), which is installed at the highest point of the circulation system.

4. The exhaust gas testing device according to claim 1, characterized in that: The exhaust valve is a vertical pipeline exhaust valve (22), and the vertical pipeline exhaust valve (22) is installed in the vertical pipeline section of the circulation pipeline (6).

5. An exhaust gas testing device according to any one of claims 1 to 4, characterized in that: The circulation pipeline (6) is a transparent pipeline.

6. The exhaust gas testing device according to claim 5, characterized in that: The circulation pipeline (6) is also provided with a thick pipe section (17) for observing bubbles.

7. The exhaust gas testing device according to claim 6, characterized in that: The air pump (10) injects gas into the circulation pipeline (6) through an air inlet provided on the circulation pipeline (6); The air inlet, expansion tank (9), vacuum degasser (7) and exhaust valve are distributed in sequence along the circulation pipeline (6).

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