Steam Trap Performance Test Device

Abstract

The present invention discloses a steam trap performance test device, wherein the steam trap performance test device includes an air supply pipeline, a water supply pipeline, a test pipeline, a connecting pipeline and a switching structure. The air supply pipeline is provided with an air storage device, which stores high-pressure air. The water supply pipeline is provided with a water storage device, which stores desalted water. The test pipeline is provided with a steam trap to be tested and a first pressure gauge, the first pressure gauge is located at the front side of the test pipeline in the flow direction. The connecting pipeline is connected between the air supply pipeline, the water supply pipeline and the test pipeline. The connecting pipeline has a first connecting state and a second connecting state. In the first connecting state, the air supply pipeline is connected only to the test pipeline to supply air to the test pipeline. In the second connecting state, the air supply pipeline is connected to the water supply pipeline and the test pipeline in sequence to supply water to the test pipeline. The switching structure is provided on the connecting pipeline to switch the connecting pipeline between the first connecting state and the second connecting state.

Description

Technical Field

[0001] The present invention relates to the technical field of steam trap detection, in particular to a steam trap performance test device. Background Art

[0002] Steam traps are generally valves used to automatically drain condensate from steam pipelines or equipment while simultaneously preventing steam from escaping with the water. To ensure the quality of these valves, China has issued several standards, primarily GB / T 12251-2005, "Test Methods for Steam Traps," and GB / T 22654-2008, "Technical Requirements for Steam Traps." Currently, steam traps are subject to numerous testing procedures, including over ten tests, including shell strength testing, actuation testing, minimum and maximum operating pressure tests, maximum back pressure tests, air discharge capacity tests, maximum and minimum subcooling tests, air leakage tests, and hot condensate discharge tests. However, most of these tests require the use of boilers to heat demineralized water from ambient temperature to high temperatures and pressures. This, combined with the high cost and cycle time of steam generation, results in high trap testing costs and time constraints. Furthermore, the steam generation process poses certain risks. Summary of the Invention

[0003] The main purpose of the present invention is to provide a steam trap performance test device, which aims to solve the problems of high cost and long test time of existing steam trap tests.

[0004] To achieve the above objectives, the present invention provides a steam trap performance test device, comprising:

[0005] An air supply pipeline, wherein an air storage device is provided on the air supply pipeline, and the air storage device stores high-pressure air;

[0006] A water supply pipeline, wherein a water storage device is provided on the water supply pipeline, and the water storage device stores desalted water;

[0007] a test pipeline, wherein the test pipeline is provided with a steam trap to be tested and a first pressure gauge, wherein the first pressure gauge is located at a front side of the test pipeline in a flow direction;

[0008] a communication pipeline connected between the air supply pipeline, the water supply pipeline, and the test pipeline, the communication pipeline having a first communication state and a second communication state. In the first communication state, the air supply pipeline is connected only to the test pipeline to supply air to the test pipeline. In the second communication state, the air supply pipeline is connected to the water supply pipeline and then to the test pipeline to supply water to the test pipeline; and

[0009] A switching structure is provided on the communicating pipeline, and is used to switch the communicating pipeline between the first communicating state and the second communicating state.

[0010] Optionally, the connecting pipeline includes a short-circuit pipeline that can be arranged in parallel with the water supply pipeline;

[0011] The switching structure includes a short-circuit switch valve provided on the short-circuit pipe and a water supply switch device provided on the water supply pipe.

[0012] Optionally, the gas supply pipeline includes a first gas supply branch pipe and a second gas supply branch pipe, a first gas storage tank and a second gas storage tank are respectively provided on the first gas supply branch pipe and the second gas supply branch pipe, and the gas storage device includes the first gas storage tank and the second gas storage tank;

[0013] The connecting pipeline further includes a gas branch, on which a gas switch valve is provided, one end of the gas branch is connected to the pipeline connecting the first gas storage tank and the water storage device, and the other end of the gas branch is connected to the gas outlet of the second gas storage tank;

[0014] One end of the short-circuit pipe is connected to one end of the air passing branch, and the other end of the short-circuit pipe is connected to the water outlet of the water storage device;

[0015] At least one of the first gas supply branch pipe and the second gas supply branch pipe can be connected to the water storage device or the test pipeline.

[0016] Optionally, the water supply pipeline includes a first water supply branch pipe and a second water supply branch pipe, a first water storage tank and a second water storage tank are respectively provided on the first water supply branch pipe and the second water supply branch pipe, and the water storage device includes the first water storage tank and the second water storage tank;

[0017] One end of the first water supply branch pipe and the second water supply branch pipe are both connected to the test pipeline, and the other ends of the first water supply branch pipe and the second water supply branch pipe are respectively connected to two ends of the gas branch;

[0018] At least one of the first water supply branch pipe and the second water supply branch pipe is connected to the first gas supply branch pipe and the test pipeline and / or the second gas supply branch pipe and the test pipeline.

[0019] Optionally, the water supply pipeline includes a first water supply branch pipe and a second water supply branch pipe, a first water storage tank and a second water storage tank are respectively provided on the first water supply branch pipe and the second water supply branch pipe, and the water storage device includes the first water storage tank and the second water storage tank;

[0020] One end of the first water supply branch pipe and the second water supply branch pipe are both connected to the gas outlet of the gas storage device, and the other end of the first water supply branch pipe and the second water supply branch pipe are both connected to the test pipeline;

[0021] The short-circuit pipes are both arranged in parallel with the first water supply branch pipe and the second water supply branch pipe;

[0022] At least one of the first water supply branch pipe and the second water supply branch pipe is connected to the gas storage device and the test pipeline.

[0023] Optionally, the air supply pipeline is provided with an air compressor, the air outlet of the air compressor is connected to the air inlet of the first air supply branch pipe, and the air inlet of the second air supply branch pipe is connected to the pipeline connecting the air compressor and the first air supply branch pipe;

[0024] The first air supply branch pipe is provided with a first air supply valve group, and the first air supply valve group is located between the air compressor and the first air storage tank;

[0025] The second air supply branch pipe is provided with a second air supply valve group, and the second air supply valve group is located between the air compressor and the second air storage tank.

[0026] Optionally, the steam trap performance testing device further includes a recovery device, and the recovery device includes:

[0027] water reservoir;

[0028] A first drainage pipeline connects the water reservoir and the steam trap to be tested; and

[0029] The first liquid level gauge is used to display the liquid level of the water reservoir.

[0030] Optionally, the recovery device further comprises:

[0031] a circulation pipeline connecting the water reservoir and the water storage device;

[0032] a circulation pump, provided in the circulation pipeline; and

[0033] A circulation switch device is provided in the circulation pipeline and is used to open or close the circulation pipeline.

[0034] Optionally, the recovery device further includes a one-way valve provided on the first drainage pipeline, so as to allow water to flow in one direction toward the water reservoir.

[0035] Optionally, the steam trap performance test device further includes a vent line and a vent switch device provided on the vent line, the vent line is connected to the test line, and the vent switch device is used to open or close the vent line.

[0036] In the technical solution of the present invention, when the steam trap to be tested is tested, the switching structure is adjusted so that the connecting pipeline is in the first connecting state. At this time, the air supply pipeline is disconnected from the water supply pipeline, and the air supply pipeline is connected to the test pipeline to perform an action test on the steam trap to be tested. When the value on the first pressure gauge reaches a specified value, the air supply pipeline is disconnected. If the value on the first pressure gauge cannot remain unchanged within a certain time (several seconds), it means that the action test has failed. If the value on the first pressure gauge can remain unchanged within a certain time, it means that the action test has failed. If the pressure remains unchanged for a period of several seconds, the switching structure is further adjusted to place the connecting line in the second connection state. The air supply line is first connected to the water supply line, and then the water supply line is connected to the test line to continue the operation test of the steam trap under test. The outlet of the steam trap under test is observed. If no water flows out of the outlet within a certain period of time (several seconds), the operation test fails. If water flows out of the outlet, the water supply line is disconnected and the above process is repeated. If at least three complete cycles are completed, the steam trap's operation performance is qualified. In this way, the switching structure and the connecting line are used to perform operation tests on the steam trap under different media to ensure that the steam trap under test meets regulatory requirements. At the same time, high-pressure air is directly delivered through the air storage device, eliminating the need for an additional boiler to prepare steam. This helps reduce testing costs and time, as well as the risks of steam preparation, thereby solving the problems of high cost and long testing time for steam traps. In addition, the number of experimental cycles is continuously increased so that the number of test cycles is much greater than 3 times and is an integer multiple of 3. The steam trap performance test device can also be used to test the life of the steam trap to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0038] Figure 1 A schematic structural diagram of an embodiment of a steam trap performance test device provided by the present invention;

[0039] Figure 2 This is a test flow chart of the steam trap performance test device provided by the present invention.

[0040] Description of Figure Numbers:

[0041]

[0042] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0043] 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.

[0044] It should be noted that if a directional indication is involved in an embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] Steam traps are generally valves used to automatically drain condensate from steam pipelines or equipment while simultaneously preventing steam from escaping with the water. To ensure the quality of these valves, China has issued several standards, primarily GB / T 12251-2005, "Test Methods for Steam Traps," and GB / T 22654-2008, "Technical Requirements for Steam Traps." Currently, steam traps are subject to numerous testing procedures, including shell strength testing, actuation testing, minimum and maximum operating pressure tests, maximum back pressure tests, air discharge capacity tests, maximum and minimum subcooling tests, air leakage tests, and hot condensate discharge tests, among more than ten others. However, most of these tests require heating demineralized water from ambient temperature to high temperature and pressure in a boiler. This results in high steam production costs and a long production cycle, leading to high costs and time-consuming testing for steam traps. Furthermore, the steam production process itself poses certain risks.

[0047] In view of this, the present invention provides a steam trap performance test device, which aims to solve the problem that the existing steam trap testing cost is too high and the testing time is too long. Figure 1 This is a schematic structural diagram of an embodiment of a steam trap performance test device provided by the present invention. Figure 2 This is a test flow chart of the steam trap performance test device provided by the present invention.

[0048] See also Figure 1 The steam trap performance test device 100 includes an air supply pipeline 1, a water supply pipeline 2, a test pipeline 3, a connecting pipeline 4 and a switching structure 5. The air supply pipeline 1 is provided with an air storage device 13, and the air storage device 13 stores high-pressure air. The water supply pipeline 2 is provided with a water storage device 23, and the water storage device 23 stores desalted water. The test pipeline 3 is provided with a steam trap to be tested 8 and a first pressure gauge 31. The first pressure gauge 31 is located at the front side of the flow direction of the test pipeline 3. The connecting pipeline 4 is connected to the air supply pipeline 1, Between the water supply pipeline 2 and the test pipeline 3, the connecting pipeline 4 has a first connecting state and a second connecting state. In the first connecting state, the air supply pipeline 1 is only connected to the test pipeline 3 to supply air to the test pipeline 3. In the second connecting state, the air supply pipeline 1 is connected to the water supply pipeline 2 and the test pipeline 3 in sequence to supply water to the test pipeline 3. The switching structure 5 is provided on the connecting pipeline 4 to enable the connecting pipeline 4 to switch between the first connecting state and the second connecting state.

[0049] In the technical solution of the present invention, when the steam trap to be tested is tested, the switching structure 5 is adjusted so that the connecting pipeline 4 is in the first connecting state. At this time, the air supply pipeline 1 is disconnected from the water supply pipeline 2, and the air supply pipeline 1 is connected to the test pipeline 3 to perform an action test on the steam trap to be tested 8. The first pressure gauge 31 is observed. When the value on the first pressure gauge 31 reaches a specified value, the air supply pipeline 1 is disconnected. If the value on the first pressure gauge 31 cannot remain unchanged within a certain time (several seconds), it means that the action test has failed, then The switching mechanism 5 is then adjusted to place the connecting line 4 in the second connected state. The air supply line 1 is disconnected from the test line 3. The air supply line 1 is first connected to the water supply line 2, and then the water supply line 2 is connected to the test line 3. The steam trap 8 under test is then tested. The outlet of the steam trap 8 is observed. If no water flows out of the outlet within a certain period of time (several seconds), the test fails. If water flows out of the outlet, the above process is repeated. If at least three complete cycles are completed, the steam trap is deemed to have passed the test. In this manner, the steam trap 8 under test is tested under different media conditions through the switching mechanism 5 and the connecting line 4 to ensure that the steam trap 8 meets regulatory requirements. High-pressure air is then directly delivered through the air storage device 13, eliminating the need for an additional boiler to generate steam. This reduces testing costs and time, as well as the risks of steam generation, thereby resolving the issues of high cost and time associated with steam trap testing. In addition, by continuously increasing the number of experimental cycles so that the number of test cycles is much greater than 3 and is an integer multiple of 3, the steam trap performance testing device 100 can also be used to test the life of the steam trap 8 to be tested.

[0050] It should be noted that, since the steam trap performance test device 100 provided by the present invention does not have a heat source, it is not suitable for testing steam traps with temperature requirements, such as thermostatic steam traps or thermodynamic steam traps, and is only suitable for mechanical steam traps.

[0051] Furthermore, the connecting pipeline 4 includes a short-circuit pipeline 41 that can be arranged in parallel with the water supply pipeline 2, and the switching structure 5 includes a short-circuit switch valve provided on the short-circuit pipeline 41 and a water supply switch device provided on the water supply pipeline 2. When the short-circuit switch valve is opened and the water supply switch device is closed, the air supply pipeline 1 is switched to be connected with the test pipeline 3, so that the high-pressure air in the air storage device 13 flows to the test pipeline 3, so that the connecting pipeline 4 forms a first connected state. When the short-circuit switch valve is closed and the water supply switch device is opened, the air supply pipeline 1 is first switched to be connected with the water supply pipeline 2, and then the water supply pipeline 2 is connected with the test pipeline 3, so that the water in the water storage device 23 flows to the test pipeline 3, so that the connecting pipeline 4 forms a second connected state. Of course, in other embodiments, the switching structure 5 can also be a three-way valve, the air outlet of the air supply pipeline 1 is connected to the inlet of the three-way valve, and the two outlets of the three-way valve are respectively connected to the short-circuit pipe 41 and the water supply pipeline 2.

[0052] In order to enable the gas supply pipeline 1 to continuously supply gas, in this embodiment, the gas supply pipeline 1 includes a first gas supply branch 11 and a second gas supply branch 12, and a first gas storage tank 131 and a second gas storage tank 132 are respectively provided on the first gas supply branch 11 and the second gas supply branch 12, and the gas storage device 13 includes the first gas storage tank 131 and the second gas storage tank 132, and the connecting pipeline 4 also includes a gas branch 42, and a gas switch valve 421 is provided on the gas branch 42. One end of the gas branch 42 is connected to the pipeline connecting the first gas tank 131 and the water storage device 23, and the other end of the gas branch 42 is connected to the pipeline connecting the first gas tank 131 and the water storage device 23. The first air supply branch pipe 11 is connected to the air outlet of the second air storage tank 132, one end of the short-circuit pipe 41 is connected to one end of the air branch 42, and the other end of the short-circuit pipe 41 is connected to the water outlet of the water storage device 23. At least one of the first air supply branch pipe 11 and the second air supply branch pipe 12 can be connected to the water storage device 23 or the test pipe 3. When the connecting pipe 4 is in the first connecting state, one end of the short-circuit pipe 41 is connected to one end of the air branch 42. At this time, the first air supply branch pipe 11 is connected to the test pipe 3 via the short-circuit pipe 41, so that the high-pressure air in the first air storage tank 131 flows through the short-circuit pipe 41. Towards the test pipeline 3, the second air supply branch pipe 12 is connected to the test pipeline 3 through the air branch 42 and the short-circuit pipe 41 in sequence, so that the high-pressure air in the second air storage tank 132 flows to the test pipeline 3; one end of the short-circuit pipe 41 is connected to the other end of the air branch 42. At this time, the first air supply branch pipe 11 is connected to the test pipeline 3 through the air branch 42 and the short-circuit pipe 41 in sequence, so that the high-pressure air in the first air storage tank 131 flows to the test pipeline 3, and the second air supply branch pipe 12 is connected to the test pipeline 3 through the short-circuit pipe 41, so that the second air storage tank 13 2 flows to the test pipeline 3. When the connecting pipeline 4 is in the second connecting state, the first air supply branch 11 is connected to the water storage device 23. At the same time, the second air supply branch 12 can be connected to the water storage device 23 via the air passing branch 42. In this way, the first air supply branch and the second air supply branch can respectively supply air to the test pipeline 3 or the water storage device 23 through the air passing branch 42. When the gas in one of the first air storage tank 131 or the second air storage tank 132 is insufficient, the gas is switched to the other air storage tank to ensure that the air supply pipeline 1 can continuously supply air. It is understandable that the number of branches in the air supply pipeline 1 includes but is not limited to two branches.

[0053] It should be noted that, in order to facilitate switching between the first gas supply branch pipe 11 and the second gas supply branch pipe 12 , a second gas supply switch valve 121 is provided on the second gas supply branch pipe 12 .

[0054] In order to facilitate the control of the pressure of the first gas storage tank 131, a second pressure gauge is connected to the first gas storage tank 131 to detect the pressure on the first gas storage tank 131. In order to ensure the safety of the first gas storage tank 131, a first gas storage tank 131 safety valve is connected to the first gas storage tank 131.

[0055] In order to facilitate the control of the pressure of the second gas storage tank 132, a third pressure gauge is connected to the second gas storage tank 132 to detect the pressure on the second gas storage tank 132. In order to ensure the safety of the second gas storage tank 132, a second gas storage tank 132 safety valve is connected to the second gas storage tank 132.

[0056] In order to be able to conduct liquid experiments and gas experiments continuously, in this embodiment, the water supply pipeline 2 includes a first water supply branch 21 and a second water supply branch 22, and a first water storage tank 231 and a second water storage tank 232 are respectively provided on the first water supply branch 21 and the second water supply branch 22. The water storage device 23 includes the first water storage tank 231 and the second water storage tank 232. One end of the first water supply branch 21 and the second water supply branch 22 are both connected to the test pipeline 3, and the other ends of the first water supply branch 21 and the second water supply branch 22 are respectively connected to the gas branch 42. At both ends, at least one of the first water supply branch pipe 21 and the second water supply branch pipe 22 is connected to the first gas supply branch pipe 11 and the test pipeline 3 and / or the second gas supply branch pipe 12 and the test pipeline 3. When the connecting pipeline 4 is in the second connecting state, the first gas supply branch pipe 11 can be connected to the first water storage tank 231 so that the water in the first water storage tank 231 flows to the test pipeline 3. The first gas supply branch pipe 11 can also be connected to the second water storage tank 232 via the gas branch 42 so that the water in the second water storage tank 232 flows to the test pipeline 3. At the same time, the first gas supply branch pipe 11 can be connected to the first water storage tank 231 so that the water in the first water storage tank 231 flows to the test pipeline 3. The second air supply branch pipe 12 can be connected to the second water storage tank 232 so that the water in the second water storage tank 232 flows to the test pipeline 3. The second air supply branch pipe 12 can also be connected to the first water storage tank 231 through the air branch 42 so that the water in the first water storage tank 231 flows to the test pipeline 3. In this way, the first air supply branch pipe 11 can connect the first water storage tank 231 with the test pipeline 3 and / or the second water storage tank 232 with the test pipeline 3 through the air branch 42, or the second air supply branch pipe 12 can connect the first water storage tank 2 31 and the test pipeline 3 and / or the second water storage tank 232 and the test pipeline 3, so that when the gas in one of the first gas storage tank 131 or the second gas storage tank 132 is insufficient, it is switched to the other gas storage tank to ensure continuous gas supply to the water storage device 23. At the same time, when the water in one of the first water storage tank 231 or the second water storage tank 232 is insufficient, it is switched to the other water storage tank to ensure continuous water supply to the test pipeline 3, so that the steam trap performance test device 100 can continuously perform liquid tests or gas tests.

[0057] To facilitate control of the first water supply branch pipe 21, a first water supply on / off valve 211 and a third water supply on / off valve 212 are provided on the first water supply branch pipe 21. The first water supply on / off valve 211 is located between the gas branch 42 and the first water tank 231, and the third water supply on / off valve 212 is located between the first water tank 231 and the test pipe 3. The provision of the first water supply on / off valve 211 and the second water supply on / off valve 221 at both ends of the first water tank 231 not only enables control over the opening and closing of the first water supply branch pipe 21 but also allows isolation of the first water tank 231 for maintenance. Furthermore, a second liquid level gauge is provided on the first water tank 231 to monitor the liquid level therein. To facilitate adding water to the first water tank 231, a first water inlet pipe is connected to the first water tank 231, which is provided with a first water inlet on / off valve. In order to facilitate the discharge of air in the first water storage pipe, the first water storage tank 231 is connected to a first exhaust pipe, and the first exhaust pipe is provided with a first exhaust switch valve. In addition, in order to ensure the safety of the first water storage tank 231, the first water storage tank 231 is connected to a first water storage tank 231 safety valve.

[0058] To facilitate control of the second water supply branch pipe 22, a second water supply on / off valve 221 and a fourth water supply on / off valve 222 are provided on the second water supply branch pipe 22. The second water supply on / off valve 221 is located between the gas branch 42 and the second water tank 232, and the fourth water supply on / off valve 222 is located between the second water tank 232 and the test pipe 3. The third water supply on / off valve 212 and the fourth water supply on / off valve 222 provided at both ends of the second water tank 232 not only control the opening and closing of the second water supply branch pipe 22 but also isolate the second water tank 232 for maintenance. Furthermore, a third liquid level gauge is provided on the second water tank 232 to monitor the liquid level therein. To facilitate adding water to the second water tank 232, a second water inlet pipe is connected to the second water tank 232, which is equipped with a second water inlet on / off valve. In order to facilitate the discharge of air in the second water storage pipe, the second water storage tank 232 is connected to a second exhaust pipe, and the second exhaust pipe is provided with a second exhaust switch valve. In addition, in order to ensure the safety of the second water storage tank 232, the second water storage tank 232 is connected to a second water storage tank 232 safety valve.

[0059] In order to ensure the safety of the first water tank 231 and the second water tank 232, when adding water, the volume of water in the first water tank 231 and the second water tank 232 generally does not exceed 70% of the volume of the first water tank 231 and the second water tank 232.

[0060] In order to enable the water supply pipeline 2 to supply water continuously, in this embodiment, the water supply pipeline 2 includes a first water supply branch pipe 21 and a second water supply branch pipe 22, and a first water storage tank 231 and a second water storage tank 232 are respectively provided on the first water supply branch pipe 21 and the second water supply branch pipe 22. The water storage device 23 includes the first water storage tank 231 and the second water storage tank 232. One end of the first water supply branch pipe 21 and the second water supply branch pipe 22 are both connected to the air outlet of the gas storage device 13, and the other end of the first water supply branch pipe 21 and the second water supply branch pipe 22 are both connected to the test pipeline 3. The short-circuit pipe 41 is arranged in parallel with the first water supply branch pipe 21 and the second water supply branch pipe 22. At least one of the first water supply branch pipe 21 and the second water supply branch pipe 22 is connected to the gas storage device 13 and the test pipeline 3. When the connecting pipeline 4 is in the second connecting state, the gas supply pipeline 1 can be connected to the first water storage tank 231 so that the water in the first water storage tank 231 flows to the test pipeline 3. At the same time, the gas supply pipeline 1 can also be connected to the second water storage tank 232 through the air branch 42 so that the water in the second water storage tank 232 flows to the test pipeline 3. In this way, when the water in one of the first water storage tank 231 or the second water storage tank 232 is insufficient, it is switched to the other water tank, so that the water supply pipeline 2 can continuously supply water to the test pipeline 3.

[0061] In order to replenish gas to the first gas storage tank 131 or the second gas storage tank 132 in time, in this embodiment, the gas supply pipeline 1 is provided with an air compressor 14, the gas outlet of the air compressor 14 is connected to the gas inlet of the first gas supply branch pipe 11, and the gas inlet of the second gas supply branch pipe 12 is connected to the pipeline connecting the air compressor 14 and the first gas supply branch pipe 11, the first gas supply branch pipe 11 is provided with a first gas supply branch pipe 111, the first gas supply branch pipe 111 is located between the air compressor 14 and the first gas storage tank 131, and the second gas supply branch pipe 1 2 is provided with a second air supply valve group 122, which is located between the air compressor 14 and the second air storage tank 132. This arrangement allows the air compressor 14 to promptly replenish air when the gas in the first air storage tank 131 or the second air storage tank 132 is insufficient, thereby ensuring continuous air supply to the air supply pipeline 1. At the same time, the first air supply branch pipe 111 and the second air supply valve group 122 are provided, so that the air compressor 14 can replenish air to the first air storage tank 131 or the second air storage tank 132 respectively. Furthermore, to ensure the safety of the first air storage tank 131 and the second air storage tank 132 during air replenishment, the pressure in the first air storage tank 131 and the second air storage tank 132 generally does not exceed 70% of the design pressure.

[0062] It should be noted that the first air supply branch pipe 111 and the second air supply valve group 122 can be a single valve or multiple valves, and the present invention does not limit this. Specifically, in this embodiment, the first air supply branch pipe 111 and the second air supply valve group 122 include an air supply valve group, and the air supply valve group includes an air supply electric valve and an air supply stop valve, and a double valve setting is adopted to improve the safety of the air supply pipeline 1.

[0063] To facilitate observation of the drainage status of the steam trap 8 under test, in this embodiment, the steam trap performance testing apparatus 100 further includes a recovery device 6. The recovery device 6 includes a water reservoir 61, a first drainage pipe 62, and a first liquid level gauge 63. The first drainage pipe 62 connects the water reservoir 61 with the steam trap 8 under test, and the first liquid level gauge 63 is used to display the liquid level of the water reservoir 61. In this configuration, water discharged from the steam trap 8 under test is transported to the water reservoir 61 via the first drainage pipe 62 and collected for centralized processing. At the same time, the provision of the first liquid level gauge 63 allows experimenters to observe the drainage status of the steam trap 8 under test.

[0064] In order to improve the utilization rate of water, in this embodiment, the recovery device 6 also includes a circulation pipeline 64, a circulation pump 65 and a circulation switch device 66. The circulation pipeline 64 connects the water reservoir 61 and the water storage device 23. The circulation pump 65 is arranged on the circulation pipeline 64. The circulation switch device 66 is arranged on the circulation pipeline 64 to open or close the circulation pipeline 64. In this way, the water in the water reservoir 61 is transported to the water storage device 23 through the circulation pipeline 64 and the circulation pump 65, so that the water can be recycled, which helps to improve the utilization rate of water.

[0065] Furthermore, the water storage device 23 includes a first water storage tank 231 and a second water storage tank 232. The circulation pipeline 64 includes a circulation main pipe and a first circulation branch pipe and a second circulation branch pipe arranged in parallel. One end of the circulation main pipe is connected to the water reservoir 61, the first circulation branch pipe is connected to the other end of the circulation main pipe and the first water storage tank 231, and the second circulation branch pipe is connected to the other end of the circulation main pipe and the second water storage tank 232. The circulation switch device 66 includes a first circulation switch valve 661 provided on the circulation main pipe, a second circulation switch valve 662 provided on the first circulation branch pipe, and a third circulation switch valve 663 provided on the second circulation branch pipe, so as to replenish water to the first water storage tank 231 or the second water storage tank 232, respectively.

[0066] In order to avoid water accumulation in the water supply pipe, in this embodiment, the recovery device 6 also includes a second drainage pipe 68 connected to the test pipe 3, and a drainage shut-off valve provided on the second drainage pipe 68. In this way, when the drainage action experiment is completed, the water supply pipe 2 is closed, and the drainage shut-off valve on the second drainage pipe 68 is opened to drain the desalted water in the test pipe 3 to prevent water accumulation in the test pipe.

[0067] In order to prevent the water in the water reservoir 61 from flowing back, in this embodiment, the recovery device 6 further includes a one-way valve 67 provided on the first drainage pipe 62, so as to allow the water to flow in one direction toward the water reservoir 61, so as to prevent the water in the water reservoir 61 from flowing back toward the steam trap 8 to be tested.

[0068] To promptly release the pressure in the test line 3, in this embodiment, the steam trap performance test apparatus 100 further includes a vent line 7 and a vent switch device 71 disposed on the vent line 7. The vent line 7 is connected to the test line 3, and the vent switch device 71 is used to open or close the vent line 7. After the operation test (the medium in the test line is air) is completed, the vent switch device 71 is opened to release the pressure in the test line 3. This helps to promptly restore the steam trap performance test apparatus 100 to its initial state, prevents pressure from remaining in the test line 3, and improves the safety of the steam trap performance test apparatus 100. In addition, during the test process, if the pressure in the test line 3 is too high, the vent line 7 is used to release some of the pressure, thereby preventing the pressure in the test line 3 from being too high.

[0069] It should be noted that the vent switch device 71 can be a single valve or multiple valves, and the present invention is not limited to this. Specifically, in this embodiment, the vent switch device 71 includes a vent electric valve and a vent stop valve, and adopts a double valve setting to improve the safety of the vent pipeline 7.

[0070] The following will introduce the experimental process of the steam trap performance test device in combination with the above embodiments. Figure 2 :

[0071] Before testing the steam trap to be tested, the steam trap to be tested 8 must be installed on the test device. The switching structure 5 is adjusted to place the connecting line 4 in the second connecting state. A certain amount of desalted water is then introduced into the steam trap to be tested 8. The water supply line 2 is then closed, and the drain shut-off valve on the second drain line 68 is opened to drain the desalted water in the test line. The drain shut-off valve on the second drain line 68 is then closed. The switching structure 5 is adjusted to place the connecting line 4 in the first connecting state. The air supply line 1 is disconnected from the water supply line 2 and connected to the test line 3 to perform an operation test on the steam trap to be tested 8 (the medium in the test line is air). The first pressure gauge 31 is observed. When the value on the first pressure gauge 31 reaches a specified value, the air supply line 1 is disconnected. If the value on the first pressure gauge 31 cannot remain constant for a specified period of time (several seconds), the operation test has failed. If the value on the first pressure gauge 31 does not remain constant for a specified period of time (several seconds), the operation test has failed. If the value on the pressure gauge 31 remains constant for a certain period of time (several seconds), the vent switch device 71 is opened until the value on the first pressure gauge 31 drops to 0. The vent switch device 71 is then closed and the switching mechanism 5 is adjusted to place the connecting pipe 4 in the second connecting state. The switching mechanism 5 is further adjusted to place the connecting pipe 4 in the second connecting state. The air supply pipe 1 is disconnected from the test pipe 3. The air supply pipe 1 is first connected to the water supply pipe 2, and then the water supply pipe 2 is connected to the test pipe 3 to continue the operation test of the steam trap 8 to be tested (the medium in the test pipe is desalted water). The outlet of the steam trap 8 to be tested is observed. If no water flows out of the outlet within a certain period of time (several seconds), the operation test fails. If water flows out of the outlet, the water supply pipe 2 is disconnected, and the water in the steam trap 8 to be tested is drained. The above process is repeated. If at least three complete cycles can be completed, the steam trap's operation performance is qualified. At the same time, the number of test cycles is continuously increased so that the number of test cycles is much larger than 3 times and is an integer multiple of 3, thereby testing the life of the steam trap 8 to be tested.

[0072] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A steam trap performance test device, characterized in that: include: An air supply pipeline, wherein an air storage device is provided on the air supply pipeline, and the air storage device stores high-pressure air; A water supply pipeline, wherein a water storage device is provided on the water supply pipeline, and the water storage device stores desalted water; a test pipeline, wherein the test pipeline is provided with a steam trap to be tested and a first pressure gauge, wherein the first pressure gauge is located at a front side of the test pipeline in a flow direction; a communication pipeline connected between the gas supply pipeline, the water supply pipeline, and the test pipeline, the communication pipeline having a first communication state and a second communication state. In the first communication state, the gas supply pipeline is connected only to the test pipeline to supply gas to the test pipeline. In the second communication state, the gas supply pipeline is connected to the water supply pipeline and then to the test pipeline to supply water to the test pipeline. as well as, a switching structure, provided on the communication pipeline, for switching the communication pipeline between the first communication state and the second communication state; The connecting pipeline includes a short-circuit pipeline that can be arranged in parallel with the water supply pipeline; The switching structure includes a short-circuit switch valve provided on the short-circuit pipe and a water supply switch device provided on the water supply pipe; The gas supply pipeline includes a first gas supply branch pipe and a second gas supply branch pipe, and a first gas storage tank and a second gas storage tank are respectively provided on the first gas supply branch pipe and the second gas supply branch pipe, and the gas storage device includes the first gas storage tank and the second gas storage tank; The connecting pipeline further includes a gas branch, on which a gas switch valve is provided, one end of the gas branch is connected to the pipeline connecting the first gas storage tank and the water storage device, and the other end of the gas branch is connected to the gas outlet of the second gas storage tank; One end of the short-circuit pipe is connected to one end of the air passing branch, and the other end of the short-circuit pipe is connected to the water outlet of the water storage device; At least one of the first gas supply branch pipe and the second gas supply branch pipe can be connected to the water storage device or the test pipeline; The air supply pipeline is provided with an air compressor, the air outlet of the air compressor is connected to the air inlet of the first air supply branch pipe, and the air inlet of the second air supply branch pipe is connected to the pipeline connecting the air compressor and the first air supply branch pipe; The first air supply branch pipe is provided with a first air supply valve group, and the first air supply valve group is located between the air compressor and the first air storage tank; The second air supply branch pipe is provided with a second air supply valve group, and the second air supply valve group is located between the air compressor and the second air storage tank; The steam trap performance test device further includes a recovery device, which includes: water reservoir; A first drainage pipeline connects the water reservoir and the steam trap to be tested; and a first liquid level gauge, for displaying the liquid level of the water reservoir; The steam trap performance test device further includes a vent pipeline and a vent switch device provided on the vent pipeline. The vent pipeline is connected to the test pipeline, and the vent switch device is used to open or close the vent pipeline.

2. The steam trap performance test device according to claim 1, characterized in that: The water supply pipeline includes a first water supply branch pipe and a second water supply branch pipe, a first water storage tank and a second water storage tank are respectively provided on the first water supply branch pipe and the second water supply branch pipe, and the water storage device includes the first water storage tank and the second water storage tank; One end of the first water supply branch pipe and the second water supply branch pipe are both connected to the test pipeline, and the other ends of the first water supply branch pipe and the second water supply branch pipe are respectively connected to two ends of the gas branch; At least one of the first water supply branch pipe and the second water supply branch pipe is connected to the first gas supply branch pipe and the test pipeline and / or the second gas supply branch pipe and the test pipeline.

3. The steam trap performance test device according to claim 1, characterized in that: The water supply pipeline includes a first water supply branch pipe and a second water supply branch pipe, a first water storage tank and a second water storage tank are respectively provided on the first water supply branch pipe and the second water supply branch pipe, and the water storage device includes the first water storage tank and the second water storage tank; One end of the first water supply branch pipe and the second water supply branch pipe are both connected to the gas outlet of the gas storage device, and the other end of the first water supply branch pipe and the second water supply branch pipe are both connected to the test pipeline; The short-circuit pipes are both arranged in parallel with the first water supply branch pipe and the second water supply branch pipe; At least one of the first water supply branch pipe and the second water supply branch pipe is connected to the gas storage device and the test pipeline.

4. The steam trap performance test device according to claim 1, wherein: The recovery device also includes: a circulation pipeline connecting the water reservoir and the water storage device; a circulation pump, provided in the circulation pipeline; and A circulation switch device is provided in the circulation pipeline and is used to open or close the circulation pipeline.

5. The steam trap performance test device according to claim 1, characterized in that: The recovery device further includes a one-way valve provided on the first drainage pipeline, for allowing water to flow in one direction toward the water reservoir.

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