A high-temperature and high-pressure valve hot-state test device

Abstract

The present invention provides a hot state test device for high temperature and high pressure valves, which includes multiple groups of experimental sections. One end of each group of experimental sections is interconnected through a first main pipeline, and the other end is interconnected through a second main pipeline. Each group of experimental sections includes an experimental pipeline for installing the valve under test, as well as a first shut-off valve and a second shut-off valve provided at the corresponding positions of the first main pipeline and the second main pipeline on the experimental pipeline; a pressure stabilizer, which is connected to the first main pipe and the second main pipe to provide a flowing medium with stable pressure for the first main pipe and the second main pipe; a plurality of heaters are respectively installed at both ends of each experimental pipeline, and each heater can operate independently to heat the medium at both ends of the valve under test. The present invention eliminates the setting of components such as main pumps and coolers, effectively reducing the cost and floor area; it can independently adjust the experimental temperature of each valve under test, with relatively small energy consumption, and the temperature control will become simpler and more accurate. At the same time, the function of detecting the internal leakage rate in the valve seat under hot state conditions is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of valve testing, and particularly to a hot-state test device for high-temperature and high-pressure valves. Background Art

[0002] When conducting high-temperature and high-pressure hot-state valve tests on valves, the valve to be tested needs to be connected to an experimental loop. This experimental loop usually includes a main pump, a pressurizer, a heater, a cooler, connecting pipelines, and corresponding control valves, etc. When this experimental loop is working, the circulating main pump is started to make the medium in the loop flow; then the heater is started to heat the medium in the loop. The heated medium flows through the valve to be tested, and then the valve action test is carried out under such working conditions. Among them, the function of the pump is on the one hand to provide a flowing medium for the valve, and on the other hand to keep the medium at the valve to be tested within a specified temperature range.

[0003] The above experimental loop has the following deficiencies: 1. This experimental loop occupies a large area and has a high cost (due to the high-temperature and high-pressure working conditions, the design pressure is above 17 MPa, and the temperature is above 350 °C. For long-term operation safety considerations, a shielded main circulation pump is mostly used), and the procurement cost is high; 2. When conducting batch tests (that is, conducting tests on multiple valves to be tested simultaneously), since its heater heats the medium in the entire loop, the test pressure and test temperature of the valves to be tested in the same batch are the same, and the test temperature of each valve to be tested cannot be adjusted; 3. According to the valve qualification test standard, some high-temperature and high-pressure valves do not require a flowing medium for the qualification test, so there is no need to use a full set of loop test devices for dynamic water tests.

[0004] Based on this, the present application specifically proposes a test device that uses static water to conduct high-temperature and high-pressure hot-state tests on valves, and has a small footprint and can adjust the test temperature of each valve to be tested during batch experiments. Summary of the Invention

[0005] The main purpose of the present invention is to provide a high-temperature and high-pressure valve hot-state test device that uses static water to conduct hot-state valve tests, has a small footprint, and can adjust the test temperature of each valve to be tested during batch experiments.

[0006] To achieve the above object, the technical solution of the present invention is realized as follows: A high-temperature and high-pressure valve hot-state test device, comprising:

[0007] Multiple groups of experimental sections, one end of each group of experimental sections is interconnected through a first main pipeline, and the other end is interconnected through a second main pipeline. Each group of experimental sections includes an experimental pipeline for installing the valve to be tested, and a first switching valve and a second switching valve provided at the positions of the corresponding first main pipeline and second main pipeline on the experimental pipeline;

[0008] A pressure stabilizer, which is connected to the first main pipe and the second main pipe, and provides a flowing medium with stable pressure for the first main pipe and the second main pipe;

[0009] There are multiple heaters, which are respectively installed at both ends of the corresponding test valves on each experimental pipeline. Each heater can operate independently and heat the medium at both ends of the test valve.

[0010] Further, the experimental pipeline is divided into a docking pipeline and a connecting pipeline. The docking pipeline is located on both sides of the test valve and is used to connect with the test valve; one end of the connecting pipeline is docked with the experimental pipeline, and the other end is connected to the first main pipe and the corresponding second main pipe; the first switching valve and the second switching valve are arranged on the connecting pipeline.

[0011] Further, the experimental pipeline further includes a first exhaust pipe. One end of the first exhaust pipe is connected to the connecting pipeline, the other end of the first exhaust pipe faces upward, and the vertical height of the end of the first exhaust pipe is higher than that of the docking pipeline and the connecting pipeline. A first exhaust valve is arranged on the first exhaust pipe to control the on-off of the first exhaust pipe.

[0012] Further, the first exhaust pipe is located on the side of the second switching valve close to the docking pipeline; the exhaust port of the first exhaust pipe can be connected to a leak detection device as a leak detection interface to detect the internal leakage of the test valve and carry out the isolation performance test of the valve.

[0013] Further, there are multiple second switching valves, and the multiple second switching valves are connected in series on the connecting pipeline.

[0014] Further, there are two first exhaust valves, which are distributed vertically on the first exhaust pipe;

[0015] The connecting pipeline connected to the first exhaust pipe is divided into upper and lower parts. The lower connecting pipeline is connected to the bottom of the first exhaust pipe, and the upper connecting pipeline is connected between the two first exhaust valves.

[0016] Further, it is characterized in that thermometers for measuring temperature and pressure gauges for measuring pressure are respectively arranged at both ends of the corresponding test valves on the experimental pipeline.

[0017] Further, there are two transfer chambers arranged on the experimental pipeline. The two transfer chambers are respectively located at both ends of the test valve. Multiple joint pipes for connecting test valves of different specifications and multiple joint valves for controlling each joint pipe are respectively arranged on the two transfer chambers.

[0018] Further, the top of the transfer chamber is connected to a second exhaust pipe, and a second exhaust valve is arranged on the second exhaust pipe;

[0019] The top height of the end of each joint pipe located inside the transfer chamber is not higher than the top height of the experimental pipeline located inside the transfer chamber.

[0020] Further, in the transfer chamber, a buffer chamber is formed between the top of the liquid level and the inner top wall of the transfer chamber.

[0021] Further, the heater is arranged in the transfer chamber.

[0022] Further, each experimental section is respectively provided with a drain port and a drain valve, and the drain valve is used to control the on-off of the drain port, and is used to discharge the medium in the experimental section after the experiment is completed.

[0023] The beneficial effects of the present invention are embodied in:

[0024] In the present invention, a pressure stabilizer is used to provide a medium with stable pressure for the first main pipe and the second main pipe, eliminating the need for high-value components such as main pumps and coolers, effectively reducing the device construction cost and floor area; during batch tests, the experimental temperature of each test valve can be adjusted, and since the medium at both ends of the test valve hardly flows, the volume of the medium to be heated is relatively small, and accordingly, the energy consumption required for heating is relatively small, and the temperature control will become simpler and more accurate. Description of the Drawings

[0025] In the drawings:

[0026] Figure 1 is the working principle diagram of the high-temperature and high-pressure valve hot-state test device described in the present invention (excluding the transfer chamber);

[0027] Figure 2 is the partial view structure of the experimental section containing the transfer chamber in the present invention;

[0028] Figure 3 is the internal structure diagram of the transfer chamber in the present invention.

[0029] Description of the Reference Numerals in the Drawings:

[0030] 1. Experimental section; 11. First switching valve; 12. Second switching valve; 13. Docking pipeline; 14. Connecting pipeline; 15. First exhaust pipe; 16. First exhaust valve; 17. Transfer chamber; 171. Second exhaust pipe; 172. Second exhaust valve; 173. Buffer chamber; 18. Connector pipe; 19. Connector valve; 2. First main pipeline; 3. Second main pipeline; 4. Test valve; 5. Pressure stabilizer; 6. Thermometer; 7. Pressure gauge. Detailed Embodiments

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the invention without creative efforts belong to the scope of protection of the invention.

[0032] See Figures 1 to 3 。

[0033] The present invention discloses a hot state test device for high-temperature and high-pressure valves, which is used for conducting hot state valve tests on valves with a nearly static medium flow velocity during actual operation, including:

[0034] Multiple groups of experimental sections 1, one end of each group of experimental sections 1 is interconnected through a first main pipeline 2, and the other end is interconnected through a second main pipeline 3. Each group of experimental sections 1 includes an experimental pipeline for installing the valve under test 4, and a first shut-off valve 11 and a second shut-off valve 12 arranged at the corresponding positions of the first main pipeline 2 and the second main pipeline 3 on the experimental pipeline;

[0035] A pressure stabilizer 5, which is connected to the first main pipe and the second main pipe, and provides a flowing medium with stable pressure for the first main pipe and the second main pipe;

[0036] Heaters (not shown in the figure), there are multiple heaters, which are respectively installed at both ends of the valve under test 4 in each experimental pipeline. Each heater can operate independently and heat the medium at both ends of the valve under test 4.

[0037] In specific implementation, the valves under test 4 are respectively installed on each experimental pipeline, and then the first shut-off valve 11 and the second shut-off valve 12 are opened to make both ends of the valves under test 4 filled with a flowing medium and reach pressure balance. Then the heaters are started to heat the working medium in the experimental pipelines at both ends of the valves under test 4. Since each heater can work independently, the experimental temperature of each valve under test 4 can be adjusted. After everything is ready, the action experiment of the valve is carried out. If a certain group of experimental sections 1 fails, the first shut-off valve 11 and the second shut-off valve 12 on the corresponding experimental section 1 can be closed to isolate the faulty experimental section 1 without affecting the normal experiments of other experimental sections 1.

[0038] The voltage stabilizer 5 in this application provides a pressure-stabilized flowing medium for the first main pipe and the second main pipe, eliminating the need for components such as pumps and coolers, effectively reducing costs and floor space; during batch tests, the experimental temperature of each test valve 4 can be adjusted, and since the medium at both ends of the test valve 4 hardly flows, the amount of medium to be heated is small, the energy consumption required for heating is small, and temperature control becomes simpler and more accurate. Also, the original high-power heater is replaced with multiple small heaters, which also reduces costs (in the existing experimental circuit, the heater needs to quickly heat the water in the entire system in a short time, and the purchase price is relatively high; now, since the medium does not flow and the total amount of medium to be heated is also smaller, small heaters can be selected).

[0039] Preferably, the flowing medium can be water. The voltage stabilizer 5 is a pressure stabilizing tank in the prior art.

[0040] Preferably, the heater can be a heating rod, which is directly inserted into the pipeline at both ends of the test valve 4 to directly heat the medium at both ends of the test valve 4; the heater can also be an electric heating wire, which is wound around the pipeline at both ends of the test valve 4 to heat the medium in the pipeline. The heater precisely adjusts the thermal power through a power regulator and maintains the working condition stable after the temperature reaches the rated working condition.

[0041] It can be imagined that a drain port and a drain valve (not shown in the figure) can be provided on each experimental section 1 for discharging the high-temperature medium in the experimental section 1 after the experiment is completed.

[0042] In an embodiment, the experimental pipeline is divided into a docking pipeline 13 and a connecting pipeline 14. The docking pipeline 13 is located on both sides of the test valve 4 and is used to connect with the test valve 4; one end of the connecting pipeline 14 is docked with the experimental pipeline, and the other end is communicated with the first main pipe and the corresponding second main pipe; the first switching valve 11 and the second switching valve 12 are arranged on the connecting pipeline 14.

[0043] In specific implementation, since the caliber of the test valve 4 is a standard caliber, the diameter of the docking pipeline 13 docked with the test valve 4 should be adapted to the caliber of the test valve 4 to simulate the real working environment; however, since the medium in the experimental pipeline hardly flows, the diameter of the connecting pipeline 14 can be made very small to save costs. At the same time, the first switching valve 11 and the second switching valve 12 are arranged on the connecting pipeline 14 with a smaller diameter, so that the first switching valve 11 and the second switching valve 12 can use a valve with a smaller specification, which further reduces costs. Similarly, the first main pipe and the corresponding second main pipe can also adopt a smaller diameter.

[0044] In one embodiment, the experimental pipeline further includes a first exhaust pipe 15. One end of the first exhaust pipe 15 is connected to the connecting pipeline 14, the other end of the first exhaust pipe 15 faces upward, and the vertical height of the end of the first exhaust pipe 15 is higher than that of the docking pipeline 13 and the connecting pipeline 14. A first exhaust valve 16 is provided on the first exhaust pipe 15 to control the on-off of the first exhaust pipe 15. With this design, the gas in the experimental pipeline can be discharged through the first exhaust pipe 15, improving the experimental accuracy.

[0045] In one embodiment, the first exhaust pipe 15 is located on the side of the second switch valve 12 close to the docking pipeline 13; the exhaust port of the first exhaust pipe 15 can be connected to a leak detection device as a leak detection interface for detecting the internal leakage of the test valve 4 and conducting the isolation performance test of the valve.

[0046] In specific implementation, when conducting the isolation performance test of the valve, first close the first exhaust valve 16, and at the same time open the first switch valve 11 and the second switch valve 12. In this way, both the front and back of the test valve 4 are connected to the pressure stabilizer 5, and the pressure difference at the front and back ends will be maintained in balance and equal to the pressure of the pressure stabilizer 5. Then, keep the test valve 4 in the closed state, close the second switch valve 12 and open the first exhaust valve 16 at the same time, and connect the exhaust port of the first exhaust pipe 15 to the leak detection device. The leak detection device can be a leak detection liquid level tube, and the liquid level tube is marked with scales for identifying the liquid level height. Heat up and increase the pressure at the front end of the test valve 4 (the end connected to the pressure stabilizer 5), and keep the heater at the back end of the test valve 4 (the end connected to the first exhaust pipe 15) closed. Adjust the rated working conditions of the temperature and pressure in front of the valve; open the first exhaust valve 16 and keep the back end of the valve full of water; record the medium temperature and pressure at the front and back ends of the test valve 4; record the status of the test device and the test piece every 30 minutes; when the medium temperature at the back end of the test valve 4 tends to be stable, start timing for leak detection and record the liquid level height of the leak detection liquid level tube; keep the temperature and pressure at the front end of the test valve 4 within the rated working condition range for 6 hours; when the high-temperature and high-pressure isolation performance test is about to end, adjust the medium temperature at the back end of the test valve 4 to be basically the same as that at the start of the test and maintain it until the end of this section of the test; after the holding time reaches 6 hours, record the liquid level height of the liquid level tube and compare it with the liquid level height at the start of the test. The volume indicated by the liquid level difference is the internal leakage of the valve.

[0047] In one embodiment, a plurality of second switch valves 12 are provided, and the plurality of second switch valves 12 are connected in series on the connecting pipeline 14. With this design, when conducting the isolation performance test of the valve, it can be ensured that no medium enters the first exhaust pipe 15 through the second switch valve 12, ensuring the experimental accuracy.

[0048] In one embodiment, two first exhaust valves 16 are provided and are distributed vertically on the first exhaust pipe 15; the connecting pipeline 14 connected to the first exhaust pipe 15 is divided into upper and lower parts, the lower connecting pipeline 14 communicates with the bottom of the first exhaust pipe 15, and the upper connecting pipeline 14 is connected between the two first exhaust valves 16. With this design, on the one hand, it is easier to discharge the gas in the experimental pipeline. On the other hand, since the first exhaust valve 16 needs to be frequently opened and closed, when the upper first exhaust valve 16 needs to be repaired or replaced, closing the lower first exhaust valve 16 and the second switch valve 12 allows the upper first exhaust valve 16 to be repaired and replaced.

[0049] Of course, the first exhaust pipe 15 can also be vertically arranged between the connecting pipeline 14 and the docking pipeline 13, and the two first exhaust valves 16 are arranged on the upper and lower sides of the connection point between the connecting pipeline 14 and the first exhaust pipe 15.

[0050] In one embodiment, a thermometer 6 for measuring temperature and a pressure gauge 7 for measuring pressure are respectively arranged at both ends of the corresponding test valve 4 of the experimental pipeline. With this design, the staff can know the temperature and pressure at both ends of the current test valve 4 in real time through the thermometer 6 and the pressure gauge 7.

[0051] In one embodiment, two transfer chambers 17 are arranged on the experimental pipeline. The two transfer chambers 17 are respectively located at both ends of the test valve 4. A plurality of connecting pipes 18 for connecting with test valves 4 of different specifications and a plurality of connecting valves 19 for controlling each connecting pipe 18 are respectively arranged on the two transfer chambers 17. With this design, the device can be docked with test valves 4 of different specifications to carry out experiments; and here, the connecting pipe 18 is equivalent to the above-mentioned docking pipeline 13, but the above-mentioned docking pipeline 13 needs to have a certain length, and the connecting pipeline 14 cannot be too thin, otherwise it cannot meet the demand for the medium when the test valve 4 is switched instantaneously; after adding the transfer chamber 17, the medium in the transfer chamber 17 can be used to meet the demand for the medium when the test valve 4 is switched instantaneously. Therefore, the connecting pipeline 14 can be made thinner, and the docking pipeline 13 can be made short enough to reduce the floor area of the equipment.

[0052] In one embodiment, a second exhaust pipe 171 is connected to the top of the transfer chamber 17, and a second exhaust valve 172 is arranged on the second exhaust pipe 171;

[0053] The top height of one end of each adapter pipe 18 located in the transfer chamber 17 is not higher than the top height of the experimental pipeline located in the transfer chamber 17. With this design, the liquid level height in the transfer chamber 17 can always be higher than the height of each adapter pipe 18, and air bubbles will automatically float up into the transfer chamber 17, so that there are no air bubbles in the water flowing through the test valve 4. The second exhaust pipe 171 and the second exhaust valve 172 located at the top of the transfer chamber 17 are used to discharge the gas accumulated in the transfer chamber 17.

[0054] In one embodiment, in the transfer chamber 17, a buffer chamber 173 is formed between the top of the liquid level and the inner top wall of the transfer chamber 17. With this design, since fluctuations will be formed at both ends when the test valve 4 is opened and closed, the buffer chamber 173 is equivalent to a voltage stabilizing device, which can play a role in stabilizing the voltage at the moment when the experimental valve is opened and closed, and can effectively balance the pressure fluctuations generated when the test valve 4 is opened and closed.

[0055] It should be noted that although the voltage stabilizer 5 is connected to both the first main pipe and the second main pipe, and the voltage stabilizer 5 can play a role in balancing the pressure fluctuations generated when the test valve 4 is opened and closed during the operation experiment of the valve, however, when the experimental pipeline is relatively short and the distance between two adjacent experimental pipelines is particularly close, there is a chance of mutual influence at this time, and once resonance occurs between multiple experimental pipelines, the experimental results will undoubtedly have a large deviation.

[0056] In one embodiment, the heater is arranged in the transfer chamber 17. With this design, it is convenient for the installation and maintenance of the heater. Among them, the thermometer 6 and the pressure gauge 7 can also be arranged in the transfer chamber 17.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0058] It should be noted that if there are directional indications (such as up and down) involved in the embodiments of the invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0059] In addition, if the description of "first", "second", etc. is involved in the embodiments of the invention, the description of "first", "second", etc. is only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, "a plurality of" means more than two. In addition, the technical solutions between the various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the invention.

Claims

1. A high temperature and high pressure valve hot state test device, characterized in that: include: A plurality of groups of experimental sections (1), one end of each group of experimental sections (1) being interconnected via a first main pipeline (2), and the other end of each group of experimental sections (1) being interconnected via a second main pipeline (3), each group of experimental sections (1) comprising an experimental pipeline for installing a test valve (4), and a first switch valve (11) and a second switch valve (12) arranged at positions of the experimental pipeline corresponding to the first main pipeline (2) and the second main pipeline (3); A pressure stabilizer (5) is connected to the first main pipe and the second main pipe to provide a medium with stable pressure for the first main pipe and the second main pipe; A plurality of heaters are provided, which are respectively installed at both ends of the corresponding test valve (4) of each experimental pipeline, and each heater can operate independently to heat the medium at both ends of the test valve (4); The experimental pipeline is provided with two transfer chambers (17), the two transfer chambers (17) are respectively located at two ends of the test valve (4), and the two transfer chambers (17) are respectively provided with a plurality of joint pipes (18) for connecting with the test valves (4) of different specifications, and a plurality of joint valves (19) for controlling each joint pipe (18); The top of the transfer chamber (17) is connected to a second exhaust pipe (171), and a second exhaust valve (172) is provided on the second exhaust pipe (171); The top height of one end of each joint pipe (18) located in the transfer chamber (17) is not higher than the top height of the experimental pipeline located in the transfer chamber (17).

2. The high temperature and high pressure valve hot state test device according to claim 1, characterized in that: The experimental pipeline is divided into a butt-joint pipeline (13) and a connecting pipeline (14); the butt-joint pipeline (13) is located on both sides of the tested valve (4) and is used to connect with the tested valve (4); one end of the connecting pipeline (14) is butt-jointed with the experimental pipeline, and the other end is connected with a first main pipe and a corresponding second main pipe; the first switch valve (11) and the second switch valve (12) are arranged on the connecting pipeline (14).

3. The high temperature and high pressure valve hot state test device according to claim 2, characterized in that: The experimental pipeline also includes a first exhaust pipe (15), one end of which is connected to the connecting pipe (14), the other end of which is facing upward, and the vertical height of the end of the first exhaust pipe (15) is higher than the butting pipe (13) and the connecting pipe (14), and the first exhaust pipe (15) is provided with a first exhaust valve (16) for controlling the opening and closing of the first exhaust pipe (15).

4. The high temperature and high pressure valve hot state test device according to claim 3, characterized in that: The first exhaust pipe (15) is located on a side of the second switch valve (12) close to the docking pipe (13); the exhaust port of the first exhaust pipe (15) can be connected to a leak detection device as a leak detection interface, so as to detect internal leakage of the tested valve (4) and carry out an isolation performance test of the valve.

5. The high temperature and high pressure valve hot state test device according to claim 3, characterized in that: A plurality of the second switch valves (12) are provided, and the plurality of second switch valves (12) are connected in series on the connecting pipeline (14).

6. The high temperature and high pressure valve hot state test device according to claim 3, characterized in that: The first exhaust valves (16) are provided with two valves, which are distributed vertically on the first exhaust pipe (15); The connecting pipeline (14) connected to the first exhaust pipe (15) is divided into two parts, the lower connecting pipeline (14) is connected to the bottom of the first exhaust pipe (15), and the upper connecting pipeline (14) is connected between the two first exhaust valves (16).

7. The high temperature and high pressure valve hot state test device according to any one of claims 1 to 6, characterized in that: A thermometer (6) for measuring temperature and a pressure gauge (7) for measuring pressure are respectively arranged at the two ends of the test valve (4) corresponding to the test pipeline.

8. The high temperature and high pressure valve hot state test device according to claim 1, characterized in that: In the transfer chamber (17), a buffer chamber (173) is formed between the top of the liquid surface and the inner top wall of the transfer chamber (17).

9. The high temperature and high pressure valve hot state test device according to claim 1, characterized in that: The heater is arranged in the transfer chamber (17).

10. The high temperature and high pressure valve hot state test device according to any one of claims 1 to 6, characterized in that: Each group of experimental sections (1) is provided with a drain port and a drain valve. The drain valve is used to control the opening and closing of the drain port and is used to discharge the medium in the experimental section (1) after the experiment is completed.

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