Flushing valve leakage test equipment

Abstract

This disclosure relates to the technical field of aircraft component repair, and particularly to a flushing valve leakage testing device, comprising an atmospheric pressure supply unit connected to the component under test (BUT) for providing a first test water pressure to the BUT, the BUT being a flushing valve; a micro-pressure supply unit connected to the BUT for providing a second test water pressure to the BUT; and an observation tube connected to the BUT, the water level in the observation tube being the observation water level. After the leakage test begins, the solenoid valve of the flushing valve is closed, and the atmospheric pressure supply unit is activated to provide the first test water pressure to the BUT. By observing the water level changes, the atmospheric pressure sealing performance of the BUT is determined. Subsequently, the micro-pressure supply unit is activated to provide the second test water pressure to the BUT, and by observing the water level changes, the micro-pressure sealing performance of the BUT is determined. By simulating atmospheric and micro-pressure environments, this device more closely approximates the operating conditions of the aircraft's sanitation system, accurately quantifies minute leaks, and provides precise and reliable detection, reducing labor costs and improving testing efficiency.

Description

Technical Field

[0001] This disclosure relates to the technical field of aircraft component repair, and in particular to a flushing valve leakage test device. Background Technology

[0002] In existing technology, flush valves are crucial components of aircraft cabin hygiene and wastewater discharge systems, and their sealing performance directly affects the normal operation and safety of these systems. Currently, leakage testing of flush valves is mainly conducted manually by listening and visual inspection. However, this method relies on the operator's experience and judgment, is highly subjective, makes it difficult to quantitatively assess the degree of leakage, and has low detection efficiency.

[0003] Therefore, it is necessary to propose a flushing valve leakage test device to at least partially solve the problems existing in the prior art. Summary of the Invention

[0004] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, this disclosure proposes a flushing valve leakage test device.

[0006] In view of this, a flushing valve leakage testing device is provided according to an embodiment of the present disclosure, comprising: An atmospheric pressure supply unit is connected to the test piece and is used to provide a first test water pressure to the test piece, wherein the test piece is a flushing valve; A micro-pressure supply unit is connected to the test piece and is used to provide a second test water pressure to the test piece; wherein the first test water pressure is ≥5 psi and the second test water pressure is ≤0.25 psi. An observation tube is connected to the aforementioned test piece. When the solenoid valve of the test piece is open, water is supplied to the observation tube through the aforementioned atmospheric pressure supply unit so that the water level in the observation tube reaches the observation water level. After the leakage test begins, the solenoid valve is closed, and the atmospheric pressure supply unit is activated to provide the first test water pressure to the test component. By observing the change in the observed water level, the sealing performance of the test component's sealing structure under atmospheric pressure is determined. Subsequently, the micro-pressure supply unit is activated to provide the test component with a second test water pressure. By observing the change in the observed water level, the sealing performance of the test component's sealing structure under micro-pressure is determined.

[0007] In one feasible implementation, the above-mentioned flushing valve leakage test equipment further includes: The three-way pipe has its first end connected to the test piece, its second end connected to the atmospheric pressure supply unit via an atmospheric pressure pipeline, and its third end connected to the micro pressure supply unit via a micro pressure pipeline. A first valve body is disposed between the second end and the measured component; The second valve body is disposed between the third end and the test piece.

[0008] In one feasible implementation, the above-mentioned atmospheric pressure supply unit includes: A water storage tank is connected to the aforementioned atmospheric pressure pipeline; A water supply pipe is connected to the aforementioned water storage tank; The third valve is installed on the aforementioned water supply pipe and is used to regulate the water supply flow rate of the aforementioned water supply pipe; A gas source is connected to the aforementioned water storage tank, and pressurized gas is pumped into the aforementioned water storage tank via a gas pump. The first pressure sensor is used to detect the first test water pressure value mentioned above.

[0009] In one feasible implementation, the above-mentioned atmospheric pressure supply unit further includes: An electrically controlled pressure regulating valve is installed between the air pump and the water storage tank to regulate the flow rate of the pressurized gas. An exhaust pipe is connected to the aforementioned water storage tank and is used to discharge the gas from the aforementioned water storage tank. An electromagnetic pressure relief valve is installed in the aforementioned exhaust pipe to regulate the flow rate of gas discharged from the aforementioned water storage tank.

[0010] In one feasible implementation, the above-mentioned solenoid valve is a normally open solenoid valve; In the case of normal pressure leakage test, first adjust the voltage supplied to the solenoid valve to 28V and adjust the first test water pressure to 5±1psi, observe the change of the observed water level. After confirming that the observed water level remains unchanged, adjust the voltage supplied to the solenoid valve to 16V and adjust the first test water pressure to 38±1psi, observe the change of the observed water level, and determine the sealing performance of the sealing structure of the test component under normal pressure.

[0011] In one feasible implementation, the aforementioned micro-pressure supply unit includes: The liquid storage cup is connected to the aforementioned micro-pressure tubing; A lifting mechanism is provided, wherein the liquid storage cup is disposed on the lifting mechanism, and the height distance between the liquid storage cup and the test piece is adjusted by the lifting mechanism to adjust the second test water pressure value; The second pressure sensor is used to detect the second test water pressure value mentioned above.

[0012] In one feasible implementation, when performing a micro-pressure leakage test, the voltage supplied to the solenoid valve is adjusted to 16±0.1V, the height distance between the liquid storage cup and the test piece is adjusted by the lifting mechanism, the second test water pressure value is adjusted to ≤0.25psi, the change in the observed water level is observed, and the sealing performance of the sealing structure of the test piece under micro-pressure conditions is determined.

[0013] In one feasible implementation, the above-mentioned lifting mechanism includes: The guide rail is arranged vertically and has a rack along its length. The gear is rotatably connected to the liquid storage cup via a connector, and the gear meshes with the guide rail. The handwheel is connected to the aforementioned gear and is used to drive the aforementioned gear to rotate.

[0014] In one feasible implementation, the above-mentioned flushing valve leakage test equipment further includes: The power supply unit is used to supply power to the aforementioned solenoid valve, the aforementioned electrically controlled pressure regulating valve, the aforementioned electromagnetic pressure relief valve, the aforementioned first pressure sensor, and the aforementioned second pressure sensor.

[0015] In one feasible implementation, the above-mentioned flushing valve leakage test equipment further includes: A drain valve, connected to the observation tube, is used to drain the water from the observation tube.

[0016] Compared with the prior art, the present disclosure at least includes the following beneficial effects: The flushing valve leakage test device provided by the embodiments of the present disclosure is provided with a normal pressure supply part, a micro pressure supply part and an observation tube. Among them, the normal pressure supply part is connected to the tested part to provide a first test water pressure to the tested part. The tested part is a flushing valve used on an aircraft, which is provided with a solenoid valve and a sealing structure. The micro pressure supply part is connected to the tested part to provide a second test water pressure to the tested part. Among them, the first test water pressure ≥ 5 psi; the second test water pressure ≤ 0.25 psi. The observation tube is connected to the tested part. When the solenoid valve is opened, water can be supplied to the tested part through the normal pressure supply part, and then the water enters the observation tube until the water level in the observation tube reaches the observation water level, so as to facilitate the staff to observe the change of the water level. With such a setting, after the leakage test starts, the solenoid valve can be closed to keep the water level in the observation tube at the observation water level. Then, the micro pressure test part is closed, and the normal pressure supply part is started to provide the first test water pressure to the tested part, and the change of the observation water level in the observation tube is observed in real time. When the observation water level does not change or is within the preset change range, it can be determined that the sealing performance of the sealing structure of the tested part under normal pressure is qualified. Then, the normal pressure supply part is closed, and the micro pressure supply part is started to provide the second test water pressure to the tested part, and the change of the observation water level in the observation tube is observed in real time. When the observation water level does not change or is within the preset change range, it can be determined that the sealing performance of the sealing structure of the tested part under micro pressure is qualified. With such a setting, by simulating the normal pressure and micro pressure gas supply environments, it is closer to the real operating conditions of the aircraft sanitation system, and can accurately quantify tiny leaks, and the detection is more accurate and reliable. It can be operated without staff with rich experience, reducing labor costs and improving detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description of the exemplary embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the exemplary embodiments and are not considered to be a limitation of the present disclosure. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings: Figure 1 FIG. is a schematic structural diagram of a flushing valve leakage test device according to an embodiment provided by the present disclosure.

[0018] Among them, Figure 1 The corresponding relationship between the reference numerals in the drawings and the component names is as follows: 100 Flushing valve leakage test equipment, 110 Atmospheric pressure supply unit, 111 Water storage tank, 112 Water filling pipe, 113 Third valve, 114 Electrically controlled pressure regulating valve, 115 Exhaust pipe, 116 Electromagnetic pressure relief valve, 117 Air pump, 120 Micro-pressure supply unit, 121 Liquid storage cup, 122 Lifting mechanism, 123 Second pressure sensor, 130 Observation tube, 140 T-connector pipe, 150 First valve body, 160 Second valve body, 170 Power supply unit. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are merely for describing exemplary embodiments of the invention. However, the invention can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0020] like Figure 1 As shown, according to an embodiment of this disclosure, a flushing valve leakage testing device 100 is provided, comprising: a normal pressure supply unit 110, connected to the test piece, for providing a first test water pressure to the test piece, wherein the test piece is a flushing valve; a micro pressure supply unit 120, connected to the test piece, for providing a second test water pressure to the test piece; wherein the first test water pressure is ≥5 psi; the second test water pressure is ≤0.25 psi; and an observation tube 130, connected to the test piece, wherein, when the solenoid valve of the test piece is open, the leakage is measured by the observation tube 130. The atmospheric pressure supply unit 110 supplies water to the observation tube 130 so that the water level in the observation tube 130 reaches the observation water level. After the leakage test begins, the solenoid valve is closed, and the atmospheric pressure supply unit 110 is activated to provide a first test water pressure to the test component. By observing the change in the observation water level, the sealing performance of the sealing structure of the test component under atmospheric pressure is determined. Subsequently, the micro-pressure supply unit 120 is activated to provide a second test water pressure to the test component. By observing the change in the observation water level, the sealing performance of the sealing structure of the test component under micro-pressure is determined.

[0021] It can be understood that the flushing valve leakage test device 100 provided by the embodiments of the present disclosure is provided with a normal pressure supply part 110, a micro pressure supply part 120 and an observation pipe 130. Among them, the normal pressure supply part 110 is connected to the tested part to provide a first test water pressure to the tested part. The tested part is a flushing valve used on an aircraft and is provided with a solenoid valve and a sealing structure. The micro pressure supply part 120 is connected to the tested part to provide a second test water pressure to the tested part. Among them, the first test water pressure ≥ 5 psi; the second test water pressure ≤ 0.25 psi. The observation pipe 130 is connected to the tested part. When the solenoid valve is opened, water can be supplied to the tested part through the normal pressure supply part 110, and then the water enters the observation pipe 130 until the water level in the observation pipe 130 reaches the observation water level, so as to facilitate the staff to observe the change of the water level. With such a setting, after the leakage test starts, the solenoid valve can be closed to keep the water level in the observation pipe 130 at the observation water level. Then, the micro pressure test part is closed, and the normal pressure supply part 110 is started to provide a first test water pressure to the tested part, and the change of the observation water level in the observation pipe 130 is observed in real time. When the observation water level does not change or is within the preset change range, it can be determined that the sealing performance of the sealing structure of the tested part under normal pressure is qualified. Then, the normal pressure supply part 110 is closed, and the micro pressure supply part 120 is started to provide a second test water pressure to the tested part, and the change of the observation water level in the observation pipe 130 is observed in real time. When the observation water level does not change or is within the preset change range, it can be determined that the sealing performance of the sealing structure of the tested part under micro pressure is qualified. With such a setting, by simulating the normal pressure and micro pressure gas supply environments, it is closer to the actual operating conditions of the aircraft sanitation system, and can accurately quantify tiny leaks, and the detection is more accurate and reliable. It can be operated by staff without rich experience, reducing labor costs and improving detection efficiency.

[0022] Exemplarily, the observation pipe 130 can be selected as a transparent hose, and the observation water level can be the middle height position of the transparent hose.

[0023] In some examples, such as Figure 1 shown, the above-mentioned flushing valve leakage test device 100 further includes: a three-way pipe 140, the first end of the three-way pipe 140 is connected to the tested part, the second end of the three-way pipe 140 is connected to the normal pressure supply part 110 through a normal pressure pipeline, and the third end of the three-way pipe 140 is connected to the micro pressure supply part 120 through a micro pressure pipeline; a first valve body 150, arranged between the second end and the tested part; a second valve body 160, arranged between the third end and the tested part.

[0024] Understandably, the flushing valve leakage testing device 100 may also be equipped with a three-way pipe 140, a first valve body 150, and a second valve body 160. The first end is located in the middle of the three-way pipe 140 and is connected to the device under test; the second end is located on the left side of the three-way pipe 140 and is connected to the atmospheric pressure supply unit 110 via an atmospheric pressure pipeline; the third end is located on the right side of the three-way pipe 140 and is connected to the low-pressure supply unit 120 via an atmospheric pressure pipeline. The first valve body 150 can be located on the atmospheric pressure pipeline. By opening the first valve body 150, the atmospheric pressure supply unit 110 can provide a first test water pressure to the device under test; by opening the second valve body 160, the low-pressure supply unit 120 can provide a second test water pressure to the device under test. With this setup, switching between normal pressure leakage testing and micro-pressure leakage testing can be performed simply by operating the opening and closing of the first valve body 150 and the second valve body 160. The operation is simple and convenient, and the three-way pipe 140 improves the overall integration of the equipment.

[0025] In some examples, such as Figure 1 As shown, the atmospheric pressure supply unit 110 includes: a water storage tank 111 connected to the atmospheric pressure pipeline; a water supply pipe 112 connected to the water storage tank 111; a third valve 113 disposed on the water supply pipe 112 for adjusting the water supply flow rate of the water supply pipe 112; an air source connected to the water storage tank 111 for pumping pressurized gas to the water storage tank 111 via an air pump 117; and a first pressure sensor for detecting the first test water pressure value.

[0026] Understandably, the water supply pipe 112 can be positioned above the water storage tank 111, allowing water to be added to the tank. The flow rate of water added from the water supply pipe 112 to the water storage tank 111 is adjusted via the third valve 113. An air source is connected to the water storage tank 111, and pressurized gas can be pumped into the tank 111 via an air pump 117 to increase the pressure inside the tank. The pressure value inside the tank is detected by a first pressure sensor until the air supply reaches the first test water pressure. The water storage tank 111 is connected to an atmospheric pressure pipeline to provide the first test water pressure to the device under test. This configuration generates a stable test pressure, and different test pressures can be adjusted according to the test conditions, improving applicability.

[0027] In some examples, such as Figure 1 As shown, the above-mentioned atmospheric pressure supply unit 110 further includes: an electrically controlled pressure regulating valve 114, which is disposed between the above-mentioned air pump 117 and the above-mentioned water storage tank 111, for regulating the flow rate of the pressurized gas; an exhaust pipe 115, which is connected to the above-mentioned water storage tank 111, for discharging the gas in the above-mentioned water storage tank 111; and an electromagnetic pressure relief valve 116, which is disposed in the above-mentioned exhaust pipe 115, for regulating the flow rate of the gas discharged from the above-mentioned water storage tank 111.

[0028] Understandably, the flow rate of pressurized gas supplied to the water storage tank 111 can be adjusted via the electrically controlled pressure regulating valve 114, thereby stabilizing the pressure inside the water storage tank 111 and improving reliability. Simultaneously, in case of unforeseen circumstances during the test, and after the test, the gas inside the water storage tank 111 can be discharged through the exhaust pipe 115 by opening the electromagnetic pressure relief valve 116. This prevents damage to the water storage tank 111 and the tested component caused by prolonged exposure to a high-pressure environment, extends the service life of the flushing valve leakage test equipment 100, and improves test safety.

[0029] In some examples, the solenoid valve is a normally open solenoid valve. When conducting a normal pressure leakage test, the voltage supplied to the solenoid valve is first adjusted to 28V, and the first test water pressure is adjusted to 5±1psi. The change in the observed water level is observed. If the observed water level remains unchanged, the voltage supplied to the solenoid valve is then adjusted to 16V, and the first test water pressure is adjusted to 38±1psi. The change in the observed water level is observed again to determine the sealing performance of the sealing structure of the test piece under normal pressure.

[0030] Understandably, the solenoid valve of the test component can be a normally open solenoid valve, meaning it is open when the test component is not energized and closes when the test component reaches its operating voltage. Therefore, after installing the test component, first activate the atmospheric pressure supply unit 110 to supply water to the test component, allowing water to enter the observation tube 130 until the water level in the observation tube 130 reaches the observation level. Then, stop the water supply and close the solenoid valve, thus completing the preparation for the atmospheric pressure leakage test. During the atmospheric pressure leakage test, first adjust the voltage of the supply solenoid valve to 28V and adjust the first test water pressure to 5±1psi to simulate the normal operating state of the aircraft's sanitary system during flight. If the observed water level remains unchanged, it indicates that the sealing structure of the test component is qualified under these conditions. Then, adjust the voltage of the supply solenoid valve to 16V and adjust the first test water pressure to 38±1psi to simulate the increased water pressure operation of the aircraft's sanitary system. If the observed water level remains unchanged, it indicates that the sealing structure of the test component is qualified under these conditions.

[0031] It should be noted that the operating conditions of the aircraft's sanitation system during flushing also need to be simulated. After completing the above two rounds of tests, the voltage supplied to the solenoid valve should be kept at 16V, and the first test water pressure should be adjusted to 45±1psi. At this time, the flushing valve should be in an operable state.

[0032] In some examples, such as Figure 1As shown, the above-mentioned micro-pressure supply part 120 includes: a liquid storage cup 121 connected to the above-mentioned micro-pressure pipeline; a lifting mechanism 122, and the above-mentioned liquid storage cup 121 is arranged on the above-mentioned lifting mechanism 122, and the height distance between the above-mentioned liquid storage cup 121 and the above-mentioned measured part is adjusted through the above-mentioned lifting mechanism 122 to adjust the above-mentioned second test water pressure value; a second pressure sensor 123 for detecting the above-mentioned second test water pressure value.

[0033] It can be understood that an appropriate amount of water can be placed in the liquid storage cup 121. The liquid storage cup 121 can be connected to the micro-pressure pipeline through a hose, and the hose is located at a position below the liquid level of the liquid storage cup 121. The liquid storage cup 121 is lifted and lowered by the lifting mechanism 122 to adjust the height distance between the liquid storage cup 121 and the measured part, thereby adjusting the second test water pressure value. The micro-pressure value is adjusted more intuitively and stably by lifting, and at the same time, the second pressure sensor 123 is used to detect the change of the second test water pressure caused by the change of the height distance between the liquid storage cup 121 and the measured part in real time, so as to ensure that the second test water pressure value ≤ 0.25 psi, so as to more accurately simulate the situation of the aircraft sanitation system in a micro-pressure environment.

[0034] Exemplarily, the lifting mechanism 122 can be a gear-rack mechanism, a screw drive mechanism, a slide rail-slider mechanism, etc., and a suitable lifting mechanism 122 can be selected according to the actual use situation.

[0035] In some examples, in the case of performing a micro-pressure leakage test, the voltage supplied to the solenoid valve is adjusted to 16 ± 0.1 V, the height distance between the liquid storage cup 121 and the measured part is adjusted through the above-mentioned lifting mechanism 122, the second test water pressure value is adjusted to ≤ 0.25 psi, and the change of the observed water level is observed to determine the sealing performance of the sealing structure of the measured part under micro-pressure conditions.

[0036] It can be understood that after the measured part completes the normal-pressure leakage test and passes, a micro-pressure leakage test needs to be performed. The voltage supplied to the solenoid valve is adjusted to 16 ± 0.1 V, and the second test water pressure value is adjusted to ≤ 0.25 psi to simulate the normal operating state of the aircraft sanitation system when the aircraft is flying. At this time, if the solenoid valve is in the closed state and the observed liquid level in the observation pipe 130 remains unchanged, it means that under these conditions, the sealing structure of the measured part is qualified in terms of sealing performance. The sealing structure of the measured part is qualified in terms of sealing performance, and the micro-pressure leakage test passes.

[0037] In some examples, the above-mentioned lifting mechanism 122 includes: a guide rail arranged in the vertical direction, and a rack is arranged in the length direction of the guide rail; a gear rotatably connected to the above-mentioned liquid storage cup 121 through a connecting member, and the gear meshes with the guide rail; a handwheel connected to the gear for driving the gear to rotate.

[0038] Understandably, the guide rail can be set vertically, and a rack can be provided on the side of the guide rail. The center of the gear can be connected to the liquid storage cup 121 via a connecting shaft, and the gear can rotate relative to the liquid storage cup 121. Thus, when the gear meshes with the rack and rotates relative to the rack, the gear can only drive the liquid storage cup 121 to rise and fall. The handwheel is connected to the gear. By turning the handwheel to rotate the gear, a large-amplitude rotation is converted into a small-amplitude linear motion, thereby more accurately adjusting the second test water pressure and improving reliability.

[0039] In some examples, such as Figure 1 As shown, the above-mentioned flushing valve leakage test equipment 100 further includes: a power supply unit 170, which is used to supply power to the above-mentioned solenoid valve, the above-mentioned electrically controlled pressure regulating valve 114, the above-mentioned electromagnetic pressure relief valve 116, the above-mentioned first pressure sensor and the above-mentioned second pressure sensor 123.

[0040] It is understandable that the power supply unit 170 can be a DC power supply, which provides stable power to the solenoid valve, the electronically controlled pressure regulating valve 114, the electromagnetic pressure relief valve 116, the first pressure sensor and the second pressure sensor 123, so as to ensure stable testing and improve reliability.

[0041] In some examples, the above-mentioned flushing valve leakage test device 100 further includes a drain valve connected to the observation tube 130 for draining water from the observation tube 130.

[0042] Understandably, after the leakage test of the tested component is completed, the drain valve can be opened to drain the water in the observation tube 130, so as to facilitate cleaning and maintenance of the tee pipe and the observation tube 130.

[0043] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0044] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0045] It should be understood that in the description of this invention, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship as commonly placed when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0048] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0049] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0050] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A device for testing leakage in flushing valves, characterized in that, include: An atmospheric pressure supply unit is connected to the test piece and is used to provide a first test water pressure to the test piece, wherein the test piece is a flushing valve; A micro-pressure supply unit, connected to the test piece, is used to provide a second test water pressure to the test piece; wherein the first test water pressure is ≥5 psi; and the second test water pressure is ≤0.25 psi. An observation tube is connected to the test piece, wherein, when the solenoid valve of the test piece is open, water is supplied to the observation tube through the constant pressure supply section so that the water level in the observation tube reaches the observation water level; After the leakage test begins, the solenoid valve is closed, and the atmospheric pressure supply unit is activated to provide a first test water pressure to the test component. By observing the change in the observed water level, the sealing performance of the test component's sealing structure under atmospheric pressure is determined. Subsequently, the micro-pressure supply unit is activated to provide a second test water pressure to the test component. By observing the change in the observed water level, the sealing performance of the test component's sealing structure under micro-pressure is determined.

2. The flushing valve leakage testing device according to claim 1, characterized in that, Also includes: A three-way pipe, the first end of which is connected to the test piece, the second end of which is connected to the atmospheric pressure supply unit via an atmospheric pressure pipeline, and the third end of which is connected to the micro pressure supply unit via a micro pressure pipeline; A first valve body is disposed between the second end and the test piece; The second valve body is disposed between the third end and the test piece.

3. The flushing valve leakage testing device according to claim 1, characterized in that, The atmospheric pressure supply unit includes: A water storage tank is connected to the atmospheric pressure pipeline; A water supply pipe is connected to the water storage tank; The third valve is installed on the water supply pipe and is used to regulate the water supply flow rate of the water supply pipe; A gas source is connected to the water storage tank and pressurized gas is pumped into the water storage tank via a gas pump. The first pressure sensor is used to detect the first test water pressure value.

4. The flushing valve leakage testing device according to claim 3, characterized in that, The atmospheric pressure supply unit also includes: An electrically controlled pressure regulating valve is installed between the air pump and the water storage tank to regulate the flow rate of the pressurized gas; An exhaust pipe, connected to the water storage tank, is used to discharge the gas in the water storage tank; An electromagnetic pressure relief valve is installed in the exhaust pipe to regulate the flow rate of gas discharged from the water storage tank.

5. The flushing valve leakage testing device according to claim 4, characterized in that, The solenoid valve is a normally open solenoid valve; In the case of normal pressure leakage test, first adjust the voltage supplied to the solenoid valve to 28V and adjust the first test water pressure to 5±1psi, observe the change of the observed water level. If the observed water level remains unchanged, then adjust the voltage supplied to the solenoid valve to 16V and adjust the first test water pressure to 38±1psi, observe the change of the observed water level, so as to determine the sealing performance of the sealing structure of the test component under normal pressure.

6. The flushing valve leakage testing device according to claim 4, characterized in that, The micro-pressure supply unit includes: A liquid storage cup is connected to the micro-pressure pipeline; A lifting mechanism is provided, wherein the liquid storage cup is disposed on the lifting mechanism, and the height distance between the liquid storage cup and the test piece is adjusted by the lifting mechanism to adjust the second test water pressure value; The second pressure sensor is used to detect the second test water pressure value.

7. The flushing valve leakage testing device according to claim 6, characterized in that, During the micro-pressure leakage test, the voltage supplied to the solenoid valve is adjusted to 16±0.1V, the height distance between the liquid storage cup and the test piece is adjusted by the lifting mechanism, the second test water pressure value is adjusted to ≤0.25psi, the change in the observed water level is observed, and the sealing performance of the test piece's sealing structure under micro-pressure conditions is determined.

8. The flushing valve leakage testing device according to claim 6, characterized in that, The lifting mechanism includes: A guide rail, wherein the guide rail is arranged vertically and a rack is provided along the length of the guide rail; A gear is rotatably connected to the liquid storage cup via a connector, and the gear meshes with the guide rail; A handwheel, connected to the gear, is used to drive the gear to rotate.

9. The flushing valve leakage testing device according to claim 6, characterized in that, Also includes: The power supply unit is used to supply power to the solenoid valve, the electrically controlled pressure regulating valve, the electromagnetic pressure relief valve, the first pressure sensor, and the second pressure sensor.

10. The flushing valve leakage testing device according to claim 6, characterized in that, Also includes: A drain valve, connected to the observation tube, is used to drain the water in the observation tube.

Images