Valve testing system

Abstract

The present application discloses a valve testing system. The valve testing system includes a steam generator, a connecting main pipe, a main control valve assembly, a vapor-liquid separation device, a water tank module, and a valve testing module. The steam generator includes a water inlet and a steam outlet. The water inlet is connected to an external water source, and the steam outlet is used to output steam. The connecting main pipe is connected to the steam outlet. The main control valve assembly is arranged on the connecting main pipe to control the on-off of the connecting main pipe. The vapor-liquid separation device is arranged on the connecting main pipe to separate condensed water in the steam. The water tank module includes a water tank body. The first end and the second end of the valve testing module are respectively connected to the connecting main pipe and the water tank body. The valve testing module is used to install the valve to be tested to detect the performance of the valve to be tested. Batch inspection of the performance of the repaired valves is achieved, the reliability of the repaired valves in subsequent use is improved, and the risk of equipment failure is reduced. In addition, the valve testing system is applicable to various types of valves, which is convenient for industrial promotion and use.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a valve testing system. Background Art

[0002] The main task of the tobacco-making workshop at a cigarette manufacturer is to process tobacco leaves into cut tobacco that meets the requirements of the cigarette-making process. This is then supplied to the packaging workshop, where it is made into cigarette sticks and packaged into finished products. The most critical process control parameters in the tobacco-making workshop are moisture content, temperature, and cut tobacco width. Steam is primarily used as the heat source. Therefore, steam valves are widely used in the tobacco-making production line. To meet the company's cost-saving and energy-saving requirements, steam valves are repaired and reused after failure. However, there is currently no performance testing platform for repaired steam valves, making it impossible to verify the performance of repaired valves. Valves that fail to achieve satisfactory repair results can cause equipment failures during use, impacting tobacco production and product quality.

[0003] It should be noted that the statements in this background technology section only provide background technology related to this application and do not necessarily constitute prior art. Summary of the Invention

[0004] The present application provides a valve testing system for testing the performance of a repaired valve.

[0005] The present application provides a valve testing system, comprising a steam generator, a connecting main pipe, a main control valve assembly, a vapor-liquid separation device, a water tank module, and a valve testing module. The steam generator comprises a water inlet and a steam outlet. The water inlet is connected to an external water source. The steam outlet is used to output steam. The connecting main pipe is connected to the steam outlet. The main control valve assembly is arranged on the connecting main pipe to control the on-off of the connecting main pipe. The vapor-liquid separation device is arranged on the connecting main pipe to separate condensed water from the steam. The water tank module comprises a water tank body, which is used to collect condensed water generated during the test. The first end of the valve testing module is connected to the connecting main pipe. The second end of the valve testing module is connected to the water tank body. The valve testing module is used to install the valve to be tested so that steam flows to the valve to be tested to detect the performance of the valve to be tested.

[0006] In some embodiments, the valve testing module includes a first detection passage and a first control valve assembly. A first end of the first detection passage is connected to a main connecting pipe. A second end of the first detection passage is connected to a water tank body. A valve to be tested is disposed in the first detection passage to receive steam output by a steam generator. The first control valve assembly is disposed in the first detection passage to control the opening and closing of the first detection passage.

[0007] In some embodiments, the first control valve assembly includes a first on-off valve and a second on-off valve. The first on-off valve is disposed between a first end of a first detection passage and a valve to be tested to control the flow of the pipeline between the first end of the first detection passage and the valve to be tested. The second on-off valve is disposed between the valve to be tested and a second end of the first detection passage to control the flow of the pipeline between the valve to be tested and the second end of the first detection passage.

[0008] In some embodiments, the valve to be tested includes a steam trap to be tested. The valve testing module includes a second detection passage for testing the performance of the steam trap, a second control valve assembly, and a heat exchanger. The second detection passage is used to install the steam trap to be tested. The first end of the second detection passage is connected to the connecting main. The second end of the second detection passage is connected to the water tank body. The second control valve assembly is disposed in the second detection passage to control the opening and closing of the second detection passage. The heat exchanger is disposed in the second detection passage and is located between the first end of the second detection passage and the steam trap to be tested. The heat exchanger is configured to cool the steam in the second detection passage into water before it enters the steam trap to be tested.

[0009] In some embodiments, the second control valve assembly includes a third on-off valve and a fourth on-off valve. The third on-off valve is disposed between the first end of the second detection passage and the heat exchanger to control the flow of the pipeline between the first end of the second detection passage and the heat exchanger. The fourth on-off valve is disposed between the steam trap to be tested and the second end of the second detection passage to control the flow of the pipeline between the steam trap to be tested and the second end of the second detection passage.

[0010] In some embodiments, the valve testing module further includes an observation mirror. The second control valve assembly further includes a first check valve. The observation mirror is disposed between the steam trap to be tested and the fourth on-off valve. The first check valve is disposed between the observation mirror and the fourth on-off valve to prevent condensate from flowing back.

[0011] In some embodiments, the water tank module includes a cooling pipeline, an eighth switching valve, and a water pump. The water tank body includes a first circulation port and a second circulation port. The first circulation port and the second circulation port are arranged at different positions on the water tank body. One end of the cooling pipeline is connected to the first circulation port. The other end of the cooling pipeline is connected to the second circulation port. The heat exchanger and the water pump are both arranged on the cooling pipeline. The water pump draws water from the first circulation port and returns the water to the water tank body through the heat exchanger and the second circulation port to condense the steam at the heat exchanger. The eighth switching valve is arranged on the cooling pipeline to control the on-off of the cooling pipeline.

[0012] In some embodiments, the valve testing module includes a reducer. A first end of the valve to be tested is connected to the main connecting pipe via the reducer. A second end of the valve to be tested is connected to the water tank body via the reducer. The reducer is used to accommodate valves of different sizes.

[0013] In some embodiments, the valve testing module further includes a first bracket and a second bracket. The first bracket and the second bracket are used to mount the reducer. The first bracket is positioned between the first end of the valve under test and the connecting main pipe. The second bracket is movably positioned between the second end of the valve under test and the water tank body.

[0014] In some embodiments, a drainage module is further included. The drainage module includes a first drainage pipeline and a first drainage control valve assembly. A first end of the first drainage pipeline is connected to the vapor-liquid separation device. A second end of the first drainage pipeline is connected to the water tank body. Condensed water separated by the vapor-liquid separation device flows through the first drainage pipeline to the water tank body. The first drainage control valve assembly is disposed in the first drainage pipeline to control the on / off operation of the first drainage pipeline.

[0015] In some embodiments, the first drain control valve assembly includes a first steam trap disposed on the first drain pipe to prevent steam in the condensed water from passing through.

[0016] In some embodiments, the drainage module further includes a second drainage line and a second drainage control valve assembly. A first end of the second drainage line is connected to the main connection pipe and is located between the vapor-liquid separation device and the valve test module. A second end of the second drainage line is connected to the water tank body. The second drainage control valve assembly is disposed in the second drainage line to control the on / off operation of the second drainage line.

[0017] In some embodiments, the second drain control valve assembly includes a second steam trap disposed on the second drain pipe to prevent steam in the condensed water from passing through.

[0018] In some embodiments, the drainage module further includes a third drainage line and a third drainage control valve assembly. One end of the third drainage line is connected to the vapor-liquid separation device. The other end of the third drainage line is connected to the water tank body. The third drainage control valve assembly is disposed in the third drainage line to control the opening and closing of the third drainage line.

[0019] In some embodiments, the water tank module includes a water supply line and a water supply control valve assembly. One end of the water supply line is connected to an external water source. The other end of the water supply line is connected to the water tank body. The water supply control valve assembly is disposed on the water supply line to control the on / off operation of the water supply line.

[0020] In some embodiments, the water tank module further includes a drain pipe and a drain switch valve. The drain pipe is connected to the bottom of the water tank body, and the drain switch valve is used to control the on / off of the drain pipe.

[0021] Based on the technical solution provided in this application, a valve testing system includes a steam generator, a connecting main, a main control valve assembly, a vapor-liquid separation device, a water tank module, and a valve testing module. The steam generator includes a water inlet and a steam outlet. The water inlet is connected to an external water source, and the steam outlet is used to output steam. The connecting main is connected to the steam outlet. The main control valve assembly is mounted on the connecting main to control the on / off operation of the connecting main. The vapor-liquid separation device is mounted on the connecting main to separate condensate from the steam. The water tank module includes a water tank body, which is used to collect condensate generated during testing. The first end of the valve testing module is connected to the connecting main. The second end of the valve testing module is connected to the water tank body. The valve testing module is used to install the valve under test so that steam flows to the valve under test to test its performance. Repaired valves under test are installed in the valve testing module, and steam is supplied to the valves under test via the connecting main. This enables batch performance testing of repaired valves, improves the reliability of the repaired valves during subsequent use, and reduces the risk of equipment failure. Furthermore, the valve testing system is applicable to a variety of valve types, facilitating widespread industrial adoption.

[0022] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 Schematic diagram of a valve testing system according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be subsequently positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used herein are interpreted accordingly.

[0028] refer to Figure 1The present application provides a valve testing system, including a steam generator G1, a connecting pipe L4, a main control valve assembly, a vapor-liquid separation device A1, a water tank module and a valve testing module. The steam generator G1 includes a water inlet and a steam outlet. The water inlet is connected to an external water source K1, and the steam outlet is used to output steam. The connecting pipe is connected to the steam outlet. The main control valve assembly is arranged on the connecting pipe L4 to control the on and off of the connecting pipe L4. The vapor-liquid separation device A1 is arranged on the connecting pipe L4 to separate condensed water from the steam. The water tank module includes a water tank body W1. The water tank body W1 is used to collect condensed water generated during the test. The first end of the valve testing module is connected to the connecting pipe L4. The second end of the valve testing module is connected to the water tank body W1. The valve testing module is used to install the valve to be tested so that steam flows to the valve to be tested to detect the performance of the valve to be tested. The repaired valves to be tested are installed in the valve test module, and steam is supplied to the valves to be tested through the connecting main pipe L4, thereby realizing batch inspection of the performance of the repaired valves, improving the reliability of the repaired valves in subsequent use, and reducing the risk of equipment failure. In addition, the valve test system is applicable to various types of valves, which is convenient for promotion and use in industry.

[0029] refer to Figure 1 In some embodiments, the main control valve assembly includes a seventh switch valve V7 and a sixteenth switch valve V16. The seventh switch valve V7 is arranged between the vapor-liquid separation device A1 and the valve test module, and the sixteenth switch valve V16 is arranged between the steam outlet and the vapor-liquid separation device A1.

[0030] refer to Figure 1 In some embodiments, the valve testing system further includes a pressure reducing valve R1 and two second pressure gauges P2. Both the pressure reducing valve R1 and the second pressure gauges P2 are located on the connecting main pipe L4. The pressure reducing valve R1 is located between the seventh on / off valve V7 and the valve detection module, and the two second pressure gauges P2 are located on either side of the pressure reducing valve R1. The pressure in the connecting main pipe L4 is controlled by the pressure reducing valve R1 and the two second pressure gauges P2 to improve system stability.

[0031] refer to Figure 1 In some embodiments, the valve testing system further includes a fourth filter F4 . The fourth filter F4 is provided on the connecting main pipe L4 to filter solid impurities.

[0032] refer to Figure 1In some embodiments, the valve testing module includes a first detection passage L1 and a first control valve assembly. The first end of the first detection passage L1 is connected to the connecting main pipe L4. The second end of the first detection passage L1 is connected to the water tank body W1. The valve to be tested is arranged on the first detection passage L1 to receive steam output by the steam generator G1. The first control valve assembly is arranged on the first detection passage L1 to control the on-off of the first detection passage L1. Specifically, the first detection passage L1 can be used to install a stop valve (or other switching valves such as a ball valve), a pressure reducing valve and a diaphragm valve. Correspondingly, a first pressure gauge P1 can also be provided on the first detection passage L1, and the first pressure gauge P1 is used to detect the performance of the pressure reducing valve. The valve testing module also includes an external air source K2, which is used to control the valve core movement of the diaphragm valve and thereby detect the performance of the diaphragm valve.

[0033] In some embodiments, the first control valve assembly includes a first on-off valve V1 and a second on-off valve V2. The first on-off valve V1 is disposed between the first end of the first detection passage L1 and the valve to be tested to control the flow of steam between the first end of the first detection passage L1 and the valve to be tested. The second on-off valve V2 is disposed between the valve to be tested and the second end of the first detection passage L1 to control the flow of steam between the valve to be tested and the second end of the first detection passage L1. Controlling the first on-off valve V1 can control whether steam flows to the valve to be tested, and controlling the second on-off valve V2 can control whether steam flows to the water tank body W1 after exiting the valve to be tested, thereby improving the controllability of the valve testing system.

[0034] refer to Figure 1 In some embodiments, a gas silencer S1 is installed at the second end of the first detection passage L1, and the gas silencer S1 is located below the water surface to reduce exhaust noise and reduce steam appearance.

[0035] refer to Figure 1 In some embodiments, the valve testing module further includes a first filter F1 . The first filter F1 is disposed on the first detection passage L1 to filter solid impurities in the steam.

[0036] In some embodiments, the valve under test includes a steam trap under test J2. The valve testing module includes a second test passage L2 for testing the performance of the steam trap, a second control valve assembly, and a heat exchanger H1. The second test passage L2 is used to install the steam trap under test J2. The first end of the second test passage L2 is connected to the connecting main L4, and the second end of the second test passage L2 is connected to the water tank body W1. The second control valve assembly is disposed in the second test passage L2 to control the on-off function of the second test passage L2. The heat exchanger H1 is disposed in the second test passage L2 and is located between the first end of the second test passage L2 and the steam trap under test J2. The heat exchanger H1 is configured to cool the steam in the second test passage L2 into water before it enters the steam trap under test J2. Specifically, the second end of the second test passage L2 is connected to the water tank body W1 at a position above the liquid level (e.g., connected to the top of the water tank body W1). After the heat exchanger H1 condenses the steam into water, the performance of the steam trap under test J2 is verified by observing whether water flows out of the second end of the second test passage L2.

[0037] refer to Figure 1 In some embodiments, the second control valve assembly includes a third on-off valve V3 and a fourth on-off valve V4. The third on-off valve V3 is disposed between the first end of the second detection passage L2 and the heat exchanger H1 to control the flow of steam between the first end of the second detection passage L2 and the heat exchanger H1. The fourth on-off valve V4 is disposed between the steam trap under test J2 and the second end of the second detection passage L2 to control the flow of steam between the steam trap under test J2 and the second end of the second detection passage L2. Controlling the first on-off valve V1 controls whether steam flows to the heat exchanger H1, and controlling the second on-off valve V2 controls whether steam flows to the water tank body W1 after exiting the steam trap under test J2, thereby improving the controllability of the valve testing system.

[0038] refer to Figure 1 In some embodiments, the valve testing module further includes an observation mirror GS1, and the second control valve assembly further includes a first check valve C1. The observation mirror GS1 is positioned between the steam trap J2 to be tested and the fourth on-off valve V4. The first check valve C1 is positioned between the observation mirror GS1 and the fourth on-off valve V4 to prevent condensate from flowing back into the water tank. Specifically, the observation mirror GS1 can be used to observe whether water is being discharged from the steam trap J2 to intuitively assess the performance of the steam trap J2. The presence of fog on the observation mirror GS1 can also be used to determine whether the steam trap J2 is leaking. The second end of the second detection path L2 is connected to the water tank body W1 at a position below the liquid level. The first check valve C1 is used to prevent water from flowing back into the water tank body W1.

[0039] refer to Figure 1In some embodiments, the valve test module further includes a second filter F2 . The second filter F2 is disposed on the second detection path and located between the heat exchanger H1 and the steam trap to be tested J2 to filter solid impurities.

[0040] refer to Figure 1 In some embodiments, the valve testing module further includes a third detection passage L3 and a third control valve assembly. The first end of the third detection passage L3 is connected to the connecting main L4. The second end of the third detection passage L3 is connected to the water tank body W1. The valve to be tested is arranged on the third detection passage L3 to receive steam output by the steam generator G1. The third control valve assembly is arranged on the third detection passage L3 to control the on-off of the third detection passage L3. The third control valve assembly includes a fifth switch valve V5 and a sixth switch valve V6. The fifth switch valve V5 is arranged between the first end of the third detection passage L3 and the valve to be tested to control the on-off of the pipeline between the first end of the third detection passage L3 and the valve to be tested. The fifth switch valve V5 is arranged between the valve to be tested and the second end of the third detection passage L3 to control the on-off of the pipeline between the valve to be tested and the second end of the third detection passage L3.

[0041] It's worth noting that the valves under test installed in both the third detection path L3 and the first detection path L1 are steam valves. The components installed in both detection paths are identical, and the valves tested are also identical. The only difference between the two is that the first detection path L1 is used to install the small-diameter steam valve under test J1, while the third detection path L3 is used to install the large-diameter steam valve under test J3.

[0042] refer to Figure 1 In some embodiments, the valve test module further includes a third filter F3. The third filter F3 is provided on the third detection path L3 and is located between the fifth switch valve V5 and the valve to be tested to filter solid impurities.

[0043] refer to Figure 1In some embodiments, the water tank module includes a cooling line L8, an eighth on-off valve V8, and a water pump E1. The water tank body W1 includes a first circulation port and a second circulation port. The first circulation port and the second circulation port are located at different positions on the water tank body W1. One end of the cooling line L8 is connected to the first circulation port. The other end of the cooling line L8 is connected to the second circulation port. The heat exchanger H1 and the water pump E1 are both located on the cooling line L8. The water pump E1 pumps water from the first circulation port and returns the water to the water tank body W1 through the heat exchanger H1 and the second circulation port, thereby condensing the steam at the heat exchanger H1. The eighth on-off valve V8 is located on the cooling line L8 to control the on-off of the cooling line L8. Specifically, the first circulation port is located at the bottom of the water tank body W1, and the second circulation port is located at a position above the liquid level in the water tank body W1 (for example, at the top of the water tank body W1). A cooling source is provided to the heat exchanger H1 through the cooling pipe 8 so that the steam is fully cooled into water at the heat exchanger H1, thereby improving the accuracy of detecting the performance of the steam trap J2 to be tested.

[0044] refer to Figure 1 In some embodiments, the water tank module further includes a seventh filter F7 . The seventh filter F7 is disposed on the cooling line L8 and located between the eighth switch valve V8 and the water pump E1 to filter solid impurities.

[0045] refer to Figure 1 In some embodiments, the valve testing module includes a reducer N1. The first end of the valve to be tested is connected to the connecting pipe L4 via the reducer N1. The second end of the valve to be tested is connected to the water tank body W1 via the reducer N1. The reducer N1 is used to accommodate valves of different sizes to be tested. Specifically, the reducer N1 can accommodate valves of different calibers to be tested. Based on this, the pipeline between the first connecting pipe L4 and the reducer N1 can use a universal sized connecting pipe, eliminating the need to replace different connecting pipes for valves of different calibers, thereby improving applicability.

[0046] In order to further adapt to valves of different sizes and improve the applicability of the valve testing system, refer to Figure 1 In some embodiments, the valve test module further includes a first bracket D1 and a second bracket D2. The first bracket D1 and the second bracket D2 are used to install the reducer N1. The first bracket D1 is disposed between the first end of the valve to be tested and the connecting pipe L4. The second bracket D2 is disposed between the second end of the valve to be tested and the water tank body W1. The second bracket D2 is movably disposed. Specifically, the second bracket D2 is disposed on the movable bracket Q1 (refer to Figure 1), the distance between the two brackets can be adjusted by adjusting the position of the second bracket D2 using the movable bracket Q1, allowing valves of different lengths to be installed. For example, if the valve to be tested is long, the movable bracket Q1 can be adjusted to move the second bracket D2 away from the first bracket D1. If the valve to be tested is short, the movable bracket Q1 can be adjusted to move the second bracket D2 closer to the first bracket D1.

[0047] In some embodiments, the movable frame Q1 is disposed on a linear guide rail to improve the centering efficiency when the reducer N1 and the valve to be tested are installed.

[0048] refer to Figure 1 In some embodiments, the valve testing system further includes a drainage module. The drainage module includes a first drainage pipeline L5 and a first drainage control valve assembly. The first end of the first drainage pipeline L5 is connected to the vapor-liquid separation device A1. The second end of the first drainage pipeline L5 is connected to the water tank body W1. The condensed water separated by the vapor-liquid separation device A1 flows to the water tank body W1 through the first drainage pipeline L5. The first drainage control valve assembly is arranged on the first drainage pipeline L5 to control the on-off of the first drainage pipeline L5. The first drainage pipeline L5 is used to drain the water in the steam generator G1 that has not been converted into steam to the water tank body W1 to improve the test accuracy.

[0049] refer to Figure 1 In some embodiments, the water tank module includes a water supply line L9 and a water supply control valve assembly. One end of the water supply line L9 is connected to an external water source K1. The other end of the water supply line L9 is connected to the water tank body W1. The water supply control valve assembly is disposed on the water supply line L9 to control the on / off state of the water supply line L9. Specifically, the other end of the water supply line L9 extends into the water tank body. The water supply control valve assembly includes a ninth on / off valve V9 and a float valve B1. The float valve B1 is disposed at the other end of the water supply line L9. When the liquid level in the water tank body W1 reaches a desired level, the valve core of the float valve B1 closes to prevent water from continuing to enter the water tank body W1, thereby achieving liquid level control.

[0050] refer to Figure 1 In some embodiments, the water tank module further includes a drain line L10 and a tenth on-off valve V10. The drain line L10 is connected to the bottom of the water tank body W1. The tenth on-off valve V10 is used to control the on / off of the drain line L10. The water in the water tank body W1 can be drained through the drain line L10. For example, after the valve test system has been used for a long time, the water temperature in the water tank body W1 may be high, which will affect the condensation effect of the heat exchanger H1 on steam. In this case, the water in the water tank body W1 needs to be drained and refilled with low-temperature water to ensure the condensation effect of the heat exchanger H1.

[0051] In some embodiments, a thermometer is provided in the water tank body W1 to obtain the water temperature. Furthermore, a liquid level gauge is also provided in the water tank body W1 to obtain the liquid level.

[0052] refer to Figure 1 In some embodiments, the water tank module further includes an overflow port and an overflow pipe L11. The overflow port is provided on the water tank body W1. One end of the overflow pipe L11 is connected to the overflow port, and the other end of the overflow pipe L11 is connected to the drain pipe L10. When the liquid level in the water tank body W1 rises to the overflow port, it flows out through the overflow pipe L11, further ensuring the stability of the liquid level in the water tank body W1.

[0053] refer to Figure 1 In some embodiments, the first drain control valve assembly includes a first steam trap T1. The first steam trap T1 is disposed on the first drain line L5 to prevent the passage of steam contained in the condensate. Specifically, the first drain control valve assembly also includes an eleventh on-off valve V11, a twelfth on-off valve V12, and a second check valve C2. The eleventh on-off valve V11 is disposed between the vapor-liquid separation device A1 and the first steam trap T1, and the twelfth on-off valve V12 is disposed between the first steam trap T1 and the water tank body W1. The second check valve C2 is disposed between the first steam trap T1 and the twelfth on-off valve V12 to prevent backflow.

[0054] Specifically, the pressure in the pipeline between the first steam trap T1 and the eleventh on-off valve V11 is higher than the pressure in the pipeline between the first steam trap T1 and the twelfth on-off valve V12. Condensate may flash after passing through the first steam trap T1, generating secondary steam. Therefore, connecting the second end of the first drain pipe L5 to a position below the liquid level in the water tank W1 prevents steam from escaping. The second check valve C2 prevents water from flowing back into the water tank W1.

[0055] refer to Figure 1 In some embodiments, the drainage module further includes a fifth filter F5 disposed on the first drainage pipe L5. The fifth filter F5 is used to filter solid impurities in the first drainage pipe L5.

[0056] After passing through the vapor-liquid separation device A1, the steam will naturally cool into water in the subsequent flow process. Figure 1In some embodiments, the drainage module further includes a second drainage line L6 and a second drainage control valve assembly. The first end of the second drainage line L6 is connected to the connecting main L4 and is located between the vapor-liquid separation device A1 and the valve test module. The second end of the second drainage line L6 is connected to the water tank body W1. The second drainage control valve assembly is disposed on the second drainage line L6 to control the on-off of the second drainage line L6. The second drainage line L6 is used to discharge water formed by cooling during the flow of steam. Furthermore, the second drainage line L6 is connected to the first drainage line L5.

[0057] refer to Figure 1 In some embodiments, the second drain control valve assembly includes a second steam trap T2. The second steam trap T2 is disposed on the second drain line L6 to prevent the passage of steam from the condensate. Specifically, the second drain control valve assembly also includes a thirteenth on-off valve V13, a fourteenth on-off valve V14, and a third check valve C3. The thirteenth on-off valve V13 is disposed between the second steam trap T2 and the first end of the second drain line L6, and the fourteenth on-off valve V14 is disposed between the second steam trap T2 and the second end of the second drain line L6. The third check valve C3 is disposed between the fourteenth on-off valve V14 and the second steam trap T2. The third check valve C3 is used to prevent backflow.

[0058] Specifically, the pressure in the pipeline between the second steam trap T2 and the thirteenth on-off valve V13 is higher than the pressure in the pipeline between the second steam trap T2 and the fourteenth on-off valve V14. Condensate may flash after passing through the second steam trap T2, producing secondary steam. Therefore, connecting the second end of the second drain line L6 below the liquid level in the water tank W1 prevents steam from escaping into the water tank W1. The third check valve C3 prevents backflow of water from the water tank W1. In some embodiments, the second end of the first drain line L5 is connected to the second end of the second drain line L6, and both lines flow into the water tank W1. Therefore, the second and third check valves C2 and C3 prevent condensate from one drain line from backflowing into the other due to pressure differences between the two drain lines.

[0059] refer to Figure 1 In some embodiments, the drainage module further includes a sixth filter F6 disposed on the second drainage line L6. The sixth filter F6 is disposed between the second steam trap T2 and the thirteenth switch valve V13.

[0060] refer to Figure 1In some embodiments, the drainage module further includes a third drainage pipeline L7 and a third drainage control valve assembly. One end of the third drainage pipeline L7 is connected to the vapor-liquid separation device A1. The other end of the third drainage pipeline L7 is connected to the water tank body W1. The third drainage control valve assembly is arranged on the third drainage pipeline L7 to control the on-off of the third drainage pipeline L7. The third drainage control valve assembly includes a fifteenth switch valve V15 arranged on the third drainage pipeline L7. When the steam generator G1 is just started, its conversion rate to condensed water is not high, which will result in a large amount of condensed water mixed in the steam. At this time, the fifteenth switch valve V15 can be opened to drain the water directly to the water tank body W1 through the third drainage pipeline L7.

[0061] In some embodiments, an external steam source may be provided, which is connected to the connecting pipe L4 in an on-off manner to directly provide steam to the valve test module.

[0062] The testing methods of the valve testing system according to some embodiments of the present application will be described in detail below.

[0063] Taking the first test path L1 as an example, before testing, install both ends of the valve to be tested on the reducer N1 on either side. Open the first and second on-off valves V1 and V2, adjust the main pressure reducing valve R1 to minimum pressure, open the eleventh to fourteenth on-off valves V11 and V14, and close the third, fifth, seventh, and fifteenth on-off valves V3 and V5, V7, and V15. Steam is introduced into the connecting main pipe L4 via the steam generator G1. Open the sixteenth on-off valve V16, allowing steam to enter the vapor-liquid separator A1. Condensate can be discharged through the first drain line L5. If the initial condensate volume is high, open the fifteenth on-off valve V15 to drain the condensate directly. Once the condensate is discharged, close the fifteenth on-off valve V15. Open the seventh on-off valve V7, and adjust the main pressure reducing valve R1 so that the pressure displayed on the second pressure gauge P2 behind the main pressure reducing valve R1 is the required test pressure.

[0064] Then observe the test phenomenon:

[0065] If the valve to be tested is a stop valve, observe whether there is steam discharge (bubbling) at the gas muffler S1 in the water tank body W1. If so, the stop valve under test will leak steam, otherwise it will not leak steam.

[0066] If the test valve is a pressure reducing valve, adjust the test pressure reducing valve to see whether the pressure display value on the first pressure gauge P1 continuously increases or decreases during the continuous pressure adjustment process, and the pressure display value does not change back and forth obviously. If so, the test pressure reducing valve is functioning properly, otherwise it is not functioning properly.

[0067] If the test valve is a switch-type diaphragm valve, the switch of the diaphragm valve is realized by controlling the on-off of the external gas source, and observing whether the valve position pointer switches smoothly between open and closed without sticking. If it sticks, it means that the valve is not sensitive and needs to be repaired; when the diaphragm valve is opened, there should be obvious steam discharge (bubbling) at the gas muffler S1 in the water tank body W1. If not, it means that the valve is not actually open; when the diaphragm valve is closed, there should be no steam discharge (no bubbling) at the gas muffler S1 in the water tank body W1. If so, it means that the valve will leak steam.

[0068] If the test valve is a controllable diaphragm valve, adjust the valve opening value in steps from small to large (or from large to small) and observe whether the valve position pointer moves smoothly without any sticking. If it does, the valve is not sensitive. After reaching the set opening, check whether the valve opening fluctuates significantly. If so, it indicates unstable valve control. The steam discharge (bubbling) at the gas muffler S1 in the water tank body W1 should increase (or decrease) as the valve opening value is adjusted from small to large (or from large to small). When the diaphragm valve is fully open, there should be noticeable steam discharge (bubbling) at the gas muffler S1 in the water tank body W1. If not, the valve is not open. When the diaphragm valve is closed, there should be no steam discharge (bubbling) at the gas muffler S1 in the water tank body W1. If there is, the valve is leaking. After the test is completed, turn off the steam generator G1 and the seventeenth on-off valve V17 to cut off the steam source. Then, close the seventh on-off valve V7, the first on-off valve V1, and the second on-off valve V2 in sequence. After the system cools down, remove the valve to be tested.

[0069] When testing the steam trap, use the second test path L2. After installing the steam trap J2 to be tested, open the third and fourth on-off valves V3 and V4, open the eleventh through fourteenth on-off valves V11 to V14, and close the first, fifth, seventh, and fifteenth on-off valves V1, V5, and V7, V15. Check the water temperature in the water tank W1. If it's high, open the tenth on-off valve V10 to drain the water. Then, open the ninth on-off valve V9 to add water to the water tank W1. Then, open the eighth on-off valve V8 and water pump E1 to circulate water through the cooling line L8. Open the seventeenth on-off valve V17 to allow steam generator G1 to output steam. Open the sixteenth on-off valve V16 to allow steam to enter the vapor-liquid separator A1. Condensate can be discharged through the first drain line L5. If the initial condensate volume is high, open the fifteenth on-off valve V15 to drain the condensate directly. Once the condensate is discharged, close the fifteenth on-off valve V15. Open the seventh switch valve V7 and adjust the main pressure reducing valve R1 so that the pressure displayed by the second pressure gauge P2 on the rear side of the main pressure reducing valve R1 is the pressure value required for the test.

[0070] Observation test phenomena:

[0071] If condensate flows through sight glass GS1, it indicates that condensate is being discharged from the steam trap J2 under test. Otherwise, the steam trap J2 under test is clogged. If fog appears in sight glass GS1 and a large amount of steam emerges from the second end of the second detection path L2, the steam trap J2 under test is leaking.

[0072] After the test is complete, close steam generator G1 and the seventeenth on-off valve V17 to cut off the steam source. Sequentially close the seventh on-off valve V7, the third on-off valve V3, and the fourth on-off valve V4. Once the system cools down, remove the steam trap J2 to be tested.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present application. They should all be included in the scope of the technical solution for protection requested in this application.

Claims

1. A valve testing system, characterized in that: include: A steam generator (G1), the steam generator (G1) comprising a water inlet and a steam outlet, the water inlet being connected to an external water source (K1), and the steam outlet being used to output steam; A connecting main (L4) connected to the steam outlet; a main control valve assembly, the main control valve assembly being arranged on the connecting main pipe (L4) to control the on-off state of the connecting main pipe (L4); a vapor-liquid separation device (A1), the vapor-liquid separation device (A1) being arranged on the connecting main pipe (L4) to separate condensed water from the steam; A water tank module, the water tank module comprising a water tank body (W1), the water tank body (W1) being used to collect condensed water generated during the test; as well as A valve test module, wherein a first end of the valve test module is connected to the connecting main pipe (L4), and a second end of the valve test module is connected to the water tank body (W1). The valve test module is used to install a valve to be tested so that steam flows to the valve to be tested to test the performance of the valve to be tested. The valve test module includes a first detection passage (L1) and a first control valve assembly. The first end of the first detection passage (L1) is connected to the connecting main pipe (L4), and the second end of the first detection passage (L1) is connected to the water tank body (W1). The valve to be tested is arranged on the first detection passage (L1) to receive steam output by the steam generator (G1). The first control valve assembly includes a first switch valve (V1) and a second switch valve (V2). The first switch valve (V1) is arranged between the first end of the first detection passage (L1) and the valve to be tested to control the on / off of the pipeline between the first end of the first detection passage (L1) and the valve to be tested. The second switch valve (V2) is arranged between the valve to be tested and the first detection passage. The first detection passage (L1) is connected to the second end of the first detection passage (L1) to control the on-off of the pipeline between the valve to be tested and the second end of the first detection passage (L1), wherein the valve to be tested includes a steam trap to be tested (J2), and the valve test module further includes a second detection passage (L2) for testing the performance of the steam trap, a second control valve assembly, and a heat exchanger (H1). The second detection passage (L2) is used to install the steam trap to be tested (J2), the first end of the second detection passage (L2) is connected to the connecting main pipe (L4), the second end of the second detection passage (L2) is connected to a position above the liquid level on the water tank body (W1), the second control valve assembly is arranged on the second detection passage (L2) to control the on-off of the second detection passage (L2), and the heat exchanger (H1) is arranged on the second detection passage (L2) and is located between the first end of the second detection passage (L2) and the steam trap to be tested (J2). The heat exchanger (H1) is configured to cool the steam in the second detection passage (L2) into water before entering the steam trap to be tested (J2).

2. The valve testing system according to claim 1, characterized in that: The second control valve assembly includes a third switch valve (V3) and a fourth switch valve (V4). The third switch valve (V3) is arranged between the first end of the second detection passage (L2) and the heat exchanger (H1) to control the on-off of the pipeline between the first end of the second detection passage (L2) and the heat exchanger (H1). The fourth switch valve (V4) is arranged between the steam trap to be tested (J2) and the second end of the second detection passage (L2) to control the on-off of the pipeline between the steam trap to be tested (J2) and the second end of the second detection passage (L2).

3. The valve testing system according to claim 2, characterized in that: The valve test module further includes an observation mirror (GS1), and the second control valve assembly further includes a first check valve (C1). The observation mirror (GS1) is arranged between the steam trap to be tested (J2) and the fourth switch valve (V4). The first check valve (C1) is arranged between the observation mirror (GS1) and the fourth switch valve (V4) to prevent condensate from flowing back.

4. The valve testing system according to claim 1, characterized in that: The water tank module includes a cooling pipeline (L8), an eighth switching valve (V8) and a water pump (E1). The water tank body (W1) includes a first circulation port and a second circulation port. The first circulation port and the second circulation port are arranged at different positions on the water tank body (W1). One end of the cooling pipeline (L8) is connected to the first circulation port, and the other end of the cooling pipeline (L8) is connected to the second circulation port. The heat exchanger (H1) and the water pump (E1) are both arranged on the cooling pipeline (L8). The water pump (E1) draws water from the first circulation port and allows the water to flow back to the water tank body (W1) through the heat exchanger (H1) and the second circulation port so that steam condenses at the heat exchanger (H1). The eighth switching valve (V8) is arranged on the cooling pipeline (L8) to control the on-off of the cooling pipeline (L8).

5. The valve testing system according to claim 1, characterized in that: The valve test module comprises a reducing joint (N1), wherein a first end of the valve to be tested is connected to the connecting main pipe (L4) via the reducing joint (N1), and a second end of the valve to be tested is connected to the water tank body (W1) via the reducing joint (N1), and the reducing joint (N1) is used to install valves to be tested of different sizes.

6. The valve testing system according to claim 5, characterized in that: The valve test module further comprises a first bracket (D1) and a second bracket (D2), wherein the first bracket (D1) and the second bracket (D2) are used to install the reducer (N1), wherein the first bracket (D1) is arranged between the first end of the valve to be tested and the connecting main pipe (L4), and the second bracket (D2) is arranged between the second end of the valve to be tested and the water tank body (W1), and the second bracket (D2) is movably arranged.

7. The valve testing system according to claim 1, characterized in that: The invention also includes a drainage module, which includes a first drainage pipeline (L5) and a first drainage control valve assembly. The first end of the first drainage pipeline (L5) is connected to the vapor-liquid separation device (A1), and the second end of the first drainage pipeline (L5) is connected to the water tank body (W1). The condensed water separated by the vapor-liquid separation device (A1) flows to the water tank body (W1) through the first drainage pipeline (L5). The first drainage control valve assembly is arranged on the first drainage pipeline (L5) to control the on-off of the first drainage pipeline (L5).

8. The valve testing system according to claim 7, characterized in that: The first drainage control valve assembly includes a first steam trap (T1), which is arranged on the first drainage pipeline (L5) to prevent steam in condensed water from passing through.

9. The valve testing system according to claim 7, characterized in that: The drainage module also includes a second drainage pipeline (L6) and a second drainage control valve assembly. The first end of the second drainage pipeline (L6) is connected to the connecting main pipe (L4) and is located between the vapor-liquid separation device (A1) and the valve test module. The second end of the second drainage pipeline (L6) is connected to the water tank body (W1). The second drainage control valve assembly is arranged on the second drainage pipeline (L6) to control the on-off of the second drainage pipeline (L6).

10. The valve testing system according to claim 9, characterized in that: The second drainage control valve assembly includes a second steam trap (T2), which is arranged on the second drainage pipeline (L6) to prevent steam in the condensed water from passing through.

11. The valve testing system according to claim 7, characterized in that: The drainage module further includes a third drainage pipeline (L7) and a third drainage control valve assembly. One end of the third drainage pipeline (L7) is connected to the vapor-liquid separation device (A1), and the other end of the third drainage pipeline (L7) is connected to the water tank body (W1). The third drainage control valve assembly is arranged on the third drainage pipeline (L7) to control the on / off of the third drainage pipeline (L7).

12. The valve testing system according to any one of claims 1 to 11, characterized in that: The water tank module comprises a water supply pipeline (L9) and a water supply control valve assembly. One end of the water supply pipeline (L9) is connected to an external water source (K1), and the other end of the water supply pipeline (L9) is connected to the water tank body (W1). The water supply control valve assembly is arranged on the water supply pipeline (L9) to control the on / off of the water supply pipeline (L9).

13. The valve testing system according to claim 12, characterized in that: The water tank module further comprises a water discharge pipeline (L10) and a water discharge switching valve (V10). The water discharge pipeline (L10) is connected to the bottom of the water tank body (W1), and the water discharge switching valve (V10) is used to control the on / off of the water discharge pipeline (L10).

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