An exhaust gas testing device

Abstract

This utility model discloses an exhaust testing device. The exhaust testing device includes a circulation system, an air pumping and metering component, and an exhaust metering component; the air pumping and metering components are connected to the circulation system. The circulation pipeline includes a pressure gauge, a flow meter, a regulating valve, and a circulation pump connected through the circulation pipeline; it also includes a vacuum degasser, an expansion tank, and a water injection component for injecting fluid into the circulation system. The air pumping and metering component includes a first water collection basin filled with water, a first measuring cylinder inverted in the water within the first water collection basin, an air extraction pipe, and an air pump; the exhaust metering component includes a second water collection basin filled with water and a second measuring cylinder inverted in the water within the second water collection basin; 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, as well as the exhaust port of the vacuum degasser and the inner cavity of the second measuring cylinder, are connected through an exhaust pipe. This utility model can be used to better test the exhaust performance of the exhaust valve under different operating conditions in a water circulation system.

Description

Technical Field

[0001] This utility model relates to the field of heating, ventilation and air conditioning system technology, and in particular to an exhaust testing device. Background Technology

[0002] The main domestic standards for measuring HVAC automatic air vent valves are GB / T 36523-2018 Composite high-speed air vent and air inlet valve for water supply pipelines and JB / T 12386-2015 Air vent valve for water supply pipelines.

[0003] The former is mainly applicable to large pipeline systems such as municipal pipelines, but not to HVAC pipeline systems; the latter is applicable to HVAC pipeline systems, but its test standard for air displacement is the same as the former. It only considers the air displacement parameter and does not take into account many complex factors such as different installation locations, different pressures, different flow velocities, different pipeline flow patterns, and different bubble sizes.

[0004] Therefore, the national standard testing method does not simulate the actual operating conditions of HVAC piping. Although this method is relatively simple, it is also rather crude and cannot accurately reflect the true air venting capacity of the air vent valve under actual operating conditions of HVAC piping.

[0005] To clarify the exhaust performance of various exhaust valves, we developed an exhaust valve exhaust volume measuring device to comprehensively test the exhaust performance of various exhaust valves. This device can not only test the exhaust performance of exhaust valves but also the degassing capacity of vacuum degassing machines. Utility Model Content

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

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An exhaust gas testing device includes a circulation system, an air pump metering component, and an exhaust gas metering component; the air pump metering component and the exhaust gas metering component are connected to the circulation system.

[0009] The circulation pipeline includes a pressure gauge, flow meter, regulating valve, and 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; it also includes a vacuum degasser, an expansion tank, and a water injection assembly for injecting fluid into the circulation system; the vacuum degasser and 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 metering assembly includes a first water basin filled with water, a first measuring cylinder inverted in the water in the first water basin, an air extraction pipe communicating with the inner cavity of the first measuring cylinder, and an air pump that draws air from the first measuring cylinder into a circulation pipeline through the air extraction pipe; the air 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, as well as the exhaust port of the vacuum degasser and the inner cavity of the second measuring cylinder, are connected by an exhaust pipe.

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

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

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

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

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

[0020] Compared with the prior art, the present invention provides an exhaust gas testing device, which has the following advantages:

[0021] The exhaust testing device of 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 with the exhaust volume at one atmosphere to clearly and quantitatively measure the exhaust performance of various exhaust valves under different operating conditions.

[0022] In addition, the testing device of this invention can be used not only to test the exhaust performance of the exhaust valve, but also to test the degassing capacity of the vacuum degasser. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the exhaust test device equipped with a horizontal pipe exhaust valve in this utility model.

[0024] Figure 2 This is a schematic diagram of the exhaust test device equipped with a top exhaust valve in this utility model.

[0025] Figure 3 This is a schematic diagram of the exhaust testing device equipped with a vertical pipe exhaust valve in this utility model.

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

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

[0028] Figure 6 Is Figure 1 A schematic diagram of the circulation system structure after removing components such as the air pump metering component and the exhaust metering component.

[0029] In the picture:

[0030] 1-Pressure pump, 2-Pressure gauge, 3-Flow meter, 4-Regulating valve, 5-Circulation pump, 6-Circulation pipeline, 7-Vacuum degasser, 8-Vacuum degasser connecting pipe, 9-Expansion tank, 10-Air pump, 11-Air inlet location, 12-First measuring cylinder, 13-First water basin, 14-Suction hose, 15-Second measuring cylinder, 16-Second water basin, 17-Thick pipe section, 18-Water inlet hose, 19-Third water basin, 20-Horizontal pipe exhaust valve, 21-Top exhaust valve, 22-Vertical pipe exhaust valve, 23-First exhaust hose, 24-Second exhaust hose, 25-Third exhaust hose, 26-Fourth exhaust hose, 27-Inner cavity of first measuring cylinder, 28-Inner cavity of second measuring cylinder, 29-Drain valve, 30-Water. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] like Figure 1-6 As shown, this utility model provides an exhaust gas testing device, including a circulation system, an air pump metering component, and an exhaust gas metering component; the air pump metering component and the exhaust gas metering component are connected to the circulation system.

[0033] like Figure 4The diagram shows the connection structure of the air metering component. This air metering component is used to inject a fixed amount of air into the circulation system.

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

[0035] The circulation system can simulate the real-world conditions of water circulation in pipelines under different operating conditions (such as 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 exhaust volume of the exhaust valve and the vacuum degasser can be tested under different operating conditions.

[0036] Specifically, such as 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 via a circulation pipeline 6. The pressure gauge 2, flow meter 3, regulating valve 4, and circulation pump 5 are connected to form a closed loop via the circulation pipeline 6; it 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 the pressure pump 1 is connected to an external water source.

[0037] The circulation pipe 6 connects the various components of the circulation system to form a fluid passage, and consists of multiple transparent pipe sections. In this embodiment, the circulation pipe 6 is a transparent pipe made of transparent high-strength UPVC material, allowing for direct observation of the flow, aggregation, and discharge of bubbles within the pipe.

[0038] The circulating pump 5 serves as a power source to drive the fluid flow within the circulating system and can be used to simulate an air conditioning circulating pump.

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

[0040] The regulating valve 4 is used to control the flow rate, and since the pipe diameter is fixed, it is also used to control the flow velocity.

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

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

[0043] In this embodiment, one end of the pressure pump 1 is connected to the circulation pipeline 6 via a pipeline, and the other end is connected to the water in the third water collection basin 19 via the water inlet hose 18. Through the pressure pump 1 and the connecting pipeline, the water in the third water collection basin 19 is pumped into the circulation pipeline 6, and then, driven by the circulation pump 5, the pumped water can circulate in the circulation system.

[0044] like Figure 4 As shown, in this embodiment, the air metering component includes a first water basin 13 filled with water, a first measuring cylinder 12 inverted in the water within the first water basin 13, an air extraction pipe communicating with the air inside the first measuring cylinder 12, and an air pump 10 that draws air from the first measuring cylinder 12 into the circulation pipeline through the air extraction pipe (for example, a variable frequency air pump can be selected to better control the air pumping speed); the air pump 10 is connected to the circulation pipeline 6. Figure 4 As shown, the lower end of the first measuring cylinder 12 does not contact the bottom of the first water basin 13, and the first measuring cylinder 12 cannot move vertically (for example, by using a clamp to hold the cylinder body of the first measuring cylinder 12, locking its position and preventing displacement). Furthermore, the air pump 10 is connected to the air inside the inner cavity 27 of the first measuring cylinder via the suction hose 14. After the air pump 10 is started, the air inside the inner cavity 27 of the first measuring cylinder is drawn out through the suction pipe (i.e., the suction hose 14) and finally injected into the circulation pipeline 6, where it mixes with the water. When the air inside the inner cavity 27 of the first measuring cylinder (i.e., the inner cavity of the first measuring cylinder) is drawn out through the suction hose 14, the water level inside the inner cavity 27 of the first measuring cylinder rises. By measuring the difference in water level before and after the rise, the volume of air injected into the circulation pipeline 6 can be obtained and controlled. Thus, the purpose of injecting a fixed amount of air into the circulation system is achieved through the air metering component.

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

[0046] Preferably, such as 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, expansion tank 9, vacuum degasser 7 and exhaust valve are distributed sequentially along the circulation pipeline 6.

[0047] Preferably, an outlet is also provided on the circulation pipe 6, which is connected to the drain valve 29. When the drain valve 29 is opened, the water in the circulation pipe 6 can be discharged through the outlet.

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

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

[0050] The operating principle of this testing device is as follows: A circulation system simulates water circulation. In a fixed-pressure water circulation system, a fixed amount of air (measured by the first measuring cylinder 12) is pumped in at one atmosphere using an air pump 10. The air passes through an exhaust valve or vacuum degasser 7; part of it is stored in the exhaust valve's cavity, and part is discharged from the circulation system. After passing through the exhaust pipe, the amount of air discharged (again at one atmosphere) is measured using a second measuring cylinder 15. This allows us to determine the exhaust performance of the test object (vacuum degasser 7 or drain valve) over a certain period of time, simulating the actual water circulation in the pipeline.

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

[0052] During the test, we can choose to quantitatively measure the exhaust volume of the exhaust valve and then immediately measure the exhaust volume of the vacuum degasser under the actual conditions of simulating pipeline water circulation. When measuring the exhaust volume of the exhaust valve, the exhaust port of the exhaust valve is connected to the inner cavity 28 of the second measuring cylinder, while the exhaust port of the vacuum degasser 7 is not connected to the inner cavity 28 of the second measuring cylinder; when measuring the exhaust volume of the vacuum degasser, the exhaust port of the vacuum degasser 7 is connected to the inner cavity 28 of the second measuring cylinder, while the exhaust port of the exhaust valve is not connected to the inner cavity 28 of the second measuring cylinder.

[0053] Preferably, the specific type and installation position of the exhaust valve connected to the circulation system can be selected as needed to test the exhaust performance of different types of exhaust valves and exhaust valves in different installation positions. 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 The diagram shown is a structural schematic of an exhaust testing device equipped with a horizontal pipe exhaust valve 20. Figure 1The structure allows for quantitative testing of the exhaust volume of the horizontal pipeline exhaust valve 20 and the exhaust volume of 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 2 The diagram shown is a structural schematic of an exhaust testing device equipped with a vertical pipe exhaust valve 22. (The diagram is used to illustrate the process.) Figure 2 The structure allows for quantitative testing of the exhaust volume of the vertical pipe exhaust valve 22 and the exhaust volume of the vacuum degasser 7. The exhaust port of the vertical pipe exhaust valve 22 and the inner cavity 28 of the second measuring cylinder can be connected by a third exhaust hose 25.

[0056] like Figure 3 The diagram shown is a structural schematic of an exhaust test device equipped with a top exhaust valve 21. Figure 3 The structure allows for 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 via a fourth exhaust hose 26.

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

Claims

1. An exhaust gas testing device, characterized by: It includes a circulation system, an air inflation metering component, and an exhaust metering component; the air inflation metering component and the exhaust metering component are connected to the circulation system; The circulation pipeline includes a pressure gauge (2), a flow meter (3), a regulating valve (4), and a circulation pump (5) connected through the circulation pipeline (6); the pressure gauge (2), flow meter (3), regulating valve (4), and circulation pump (5) are connected to form a closed loop through the circulation pipeline (6); it 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 the pressure pump (1) is connected to an external water source; 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 communicating with the inner cavity of the first measuring cylinder (12), and an air pump (10) that draws air from 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); The exhaust metering assembly includes a second water collection basin (16) filled with water and a second measuring cylinder (15) inverted in the water in the second water collection basin (16); It also includes an exhaust valve connected to the circulation pipeline (6); the exhaust port of the exhaust valve is connected to the inner cavity of the second measuring cylinder (15) and the exhaust port of the vacuum degasser (7) is connected to the inner cavity of the second measuring cylinder (15) through an exhaust pipe.

2. An exhaust testing device as claimed in claim 1, wherein: The exhaust valve is a horizontal pipe exhaust valve (20), which is installed in the horizontal pipe section of the circulation pipe (6).

3. An exhaust testing device as claimed in claim 1, wherein: The exhaust valve is a top exhaust valve (21), which is installed at the highest point of the circulation system.

4. An exhaust testing device as claimed in claim 1, wherein: The exhaust valve is a vertical pipe exhaust valve (22), which is installed in the vertical pipe section of the circulation pipeline (6).

5. An exhaust testing device according to any one of claims 1 to 4, wherein: 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 equipped with a thick pipe section (17) for observing bubbles.

7. An exhaust testing device as claimed in claim 6, wherein: The air pump (10) injects gas into the circulation pipe (6) through the air inlet provided on the circulation pipe (6); The air inlet, expansion tank (9), vacuum degasser (7), and exhaust valve are distributed sequentially along the circulation pipeline (6).

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