High-temperature and high-pressure valve thermal state test device

Abstract

The invention provides a high-temperature and high-pressure valve thermal state test device which comprises a plurality of groups of test sections, one ends of the test sections are communicated with one another through a first main pipeline, the other ends of the test sections are communicated with one another through a second main pipeline, and each test section comprises a test pipeline used for installing a tested valve. The first switch valve and the second switch valve are arranged on the experimental pipeline corresponding to the first main pipeline and the second main pipeline; the pressure stabilizer is communicated with 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; the plurality of heaters are installed at the two ends of each experiment pipeline respectively, and each heater can operate independently to heat media at the two ends of the tested valve. The arrangement of components such as a main pump and a cooler is omitted, so that the cost and the occupied area are effectively reduced; experiment temperatures of all tested valves can be independently adjusted, the needed energy consumption is small, temperature control becomes simpler and more accurate, and meanwhile the function of detecting the leakage rate in the valve seat under the thermal state working condition is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of valve testing, and in particular to a high-temperature and high-pressure valve hot state testing device. Background Art

[0002] When conducting a high-temperature and high-pressure hot valve test on a valve, the valve under test needs to be connected to the experimental circuit, which usually includes a main pump, a voltage stabilizer, a heater, a cooler, and connecting pipes and corresponding control valves, etc. When the experimental circuit is working, the circulating main pump is started to allow the medium in the circuit to flow; then the heater is started to heat the medium in the circuit, and the heated medium flows through the valve under test, and then the valve action test is carried out under this working condition. Among them, the role of the pump is, on the one hand, to provide the valve with flowing medium, and on the other hand, to keep the medium at the valve under test within the specified temperature range.

[0003] The above-mentioned experimental circuit has the following shortcomings: 1. The experimental circuit occupies a large area and has high cost (due to the high temperature and high pressure working conditions, the design pressure is above 17MPa and the temperature is above 350℃. For the sake of long-term operation safety, a shielded main circulation pump is often used), and the procurement cost is high; 2. When conducting batch tests (that is, testing multiple test valves at the same time), since the heater heats the medium in the entire circuit, the test pressure and test temperature of the test valves in the same batch are the same, and the test temperature of each test valve cannot be adjusted; 3. According to the valve identification test standard, some high temperature and high pressure valves do not require flowing media for identification tests, so there is no need to use a full set of circuit test equipment for dynamic water testing.

[0004] Based on this, the present application specifically proposes a test device that uses still water to conduct high-temperature and high-pressure hot tests on valves, occupies a small area, and can adjust the test temperature of each tested valve during batch testing. Summary of the invention

[0005] The main purpose of the present invention is to provide a high-temperature and high-pressure valve hot test device which uses still water to conduct hot valve tests, occupies a small area, and can adjust the test temperature of each tested valve during batch tests.

[0006] To achieve the above object, the technical solution of the present invention is implemented as follows: a high temperature and high pressure valve hot state test device, comprising: A plurality of 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, and each group of experimental sections includes an experimental pipeline for installing a tested valve, and a first switch valve and a second switch valve arranged at positions of the first main pipeline and the second main pipeline on the experimental pipeline corresponding to the positions; A pressure stabilizer is connected to the first main pipe and the second main pipe to provide a flow medium with stable pressure for the first main pipe and the second main pipe; There are multiple heaters, which are respectively installed at both ends of the corresponding test valves in each experimental pipeline. Each heater can operate independently to heat the medium at both ends of the test valve.

[0007] Furthermore, the experimental pipeline is divided into a butt-joint pipeline and a connecting pipeline. The butt-joint 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 butt-joined with the experimental pipeline, and the other end is connected with the first main pipe and the corresponding second main pipe; the first switch valve and the second switch valve are arranged on the connecting pipeline.

[0008] Furthermore, the experimental pipeline also includes a first exhaust pipe, one end of which is connected to the connecting pipeline, the other end of the first exhaust pipe is facing upward, and the vertical height of the end of the first exhaust pipe is higher than the butt pipe and the connecting pipeline. The first exhaust pipe is provided with a first exhaust valve for controlling the on and off of the first exhaust pipe.

[0009] Furthermore, the first exhaust pipe is located on a side of the second switch valve close to the docking pipe; the exhaust port of the first exhaust pipe can be connected to a leak detection device as a leak detection interface to detect internal leakage of the tested valve and conduct an isolation performance test of the valve.

[0010] Furthermore, the second switch valve is provided in plurality, and the plurality of second switch valves are connected in series on the connecting pipeline.

[0011] Furthermore, the first exhaust valve is provided with two, which are distributed in the first exhaust pipe in an upper and lower manner; The connecting pipeline connected to the first exhaust pipe is divided into two parts, the lower connecting pipeline is communicated with the bottom of the first exhaust pipe, and the upper connecting pipeline is connected between the two first exhaust valves.

[0012] Furthermore, it is characterized in that two ends of the test valve corresponding to the test pipeline are respectively provided with a thermometer for measuring temperature and a pressure gauge for measuring pressure.

[0013] Furthermore, two transfer chambers are provided on the experimental pipeline, and the two transfer chambers are respectively located at the two ends of the test valve. The two transfer chambers are respectively provided with multiple connector pipes for connecting with test valves of different specifications, and multiple connector valves for controlling each connector pipe.

[0014] Furthermore, the top of the transfer chamber is connected to a second exhaust pipe, and a second exhaust valve is provided on the second exhaust pipe; The top height of each joint pipe at one end in the transfer chamber is not higher than the top height of the experimental pipeline in the transfer chamber.

[0015] Furthermore, a buffer cavity is formed in the transfer chamber between the top of the liquid surface and the inner top wall of the transfer chamber.

[0016] Furthermore, the heater is arranged in the transfer chamber.

[0017] Furthermore, each group of experimental sections is provided with a drain port and a drain valve, and the drain valve is used to control the on-off of the drain port, so as to discharge the medium in the experimental section after the experiment is completed.

[0018] The beneficial effects of the present invention are embodied in: The present invention uses a voltage stabilizer to provide a medium with stable pressure for the first main pipe and the second main pipe, thereby eliminating the need for high-value components such as a main pump and a cooler, and effectively reducing the construction cost and floor space of the device. The experimental temperature of each tested valve can be adjusted during batch testing, and since the medium at both ends of the tested valve hardly flows, the volume of the medium required to be heated is small, and accordingly the energy consumption required for heating is small, and temperature control becomes simpler and more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the attached picture: Figure 1 This is a working principle diagram of the high-temperature and high-pressure valve hot state test device described in the present invention (excluding the transfer chamber); Figure 2 It is a partial diagram structure of the experimental section containing the transfer chamber in the present invention; Figure 3 It is the internal structure diagram of the transfer chamber in the present invention.

[0020] Description of reference numerals: 1. Experimental section; 11. First switch valve; 12. Second switch valve; 13. Butt pipe; 14. Connecting pipe; 15. First exhaust pipe; 16. First exhaust valve; 17. Transfer chamber; 171. Second exhaust pipe; 172. Second exhaust valve; 173. Buffer chamber; 18. Connecting pipe; 19. Connecting valve; 2. First main pipeline; 3. Second main pipeline; 4. Test valve; 5. Voltage stabilizer; 6. Thermometer; 7. Pressure gauge. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the invention.

[0022] See also Figures 1 to 3 .

[0023] The present invention discloses a high-temperature and high-pressure valve hot state test device, which is used to perform hot state valve test on valves whose medium flow velocity is almost stationary during actual operation, and comprises: A plurality of experimental sections 1, one end of each experimental section 1 is interconnected through a first main pipeline 2, and the other end is interconnected through a second main pipeline 3, and each experimental section 1 comprises 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 first main pipeline 2 and the second main pipeline 3 on the experimental pipeline; A pressure stabilizer 5 is connected to the first main pipe and the second main pipe to provide a flow medium with stable pressure for the first main pipe and the second main pipe; There are multiple heaters (not shown in the figure), which are respectively installed at both ends of the corresponding test valve 4 of each experimental pipeline. Each heater can operate independently to heat the medium at both ends of the test valve 4.

[0024] In the specific implementation, the test valve 4 is installed on each experimental pipeline respectively, and then the first switch valve 11 and the second switch valve 12 are opened to fill the two ends of the test valve 4 with flowing medium and reach pressure balance, and then the heater is started to heat the working medium in the experimental pipeline at both ends of the test valve 4. Since each heater can work independently, the experimental temperature of each test valve 4 can be adjusted; after everything is ready, the valve action test is carried out; if a group of experimental sections 1 fails, the first switch valve 11 and the second switch valve 12 on the corresponding experimental section 1 can be closed to isolate the faulty experimental section 1 without affecting the normal experiment of other experimental sections 1.

[0025] The present application uses a voltage stabilizer 5 to provide a pressure-stable flowing medium for the first main pipe and the second main pipe, eliminating the need for components such as pumps and coolers, and effectively reducing costs and floor space. The experimental temperature of each valve 4 under test can be adjusted during batch testing, and since the medium at both ends of the valve 4 under test hardly flows, the amount of medium required for heating is small, the energy consumption required for heating is small, and temperature control will become simpler and more accurate. In addition, the original high-power heater is replaced by multiple small heaters, and the cost will also be reduced (the heater in the existing experimental loop needs to quickly heat the water in the entire system in a short time, and the purchase price is relatively high; but now since the medium does not flow and the total amount of medium required for heating is also reduced, a small heater can be selected).

[0026] Preferably, the flowing medium may be water. The pressure stabilizer 5 is a pressure stabilizing tank in the prior art.

[0027] Preferably, the heater can be a heating rod, which is directly inserted into the pipes at both ends of the tested valve 4 to directly heat the medium at both ends of the tested valve 4; the heater can also be an electric heating wire, which is wound around the pipes at both ends of the tested valve 4 to heat the medium in the pipes. The heater accurately adjusts the thermal power through the power regulator, and maintains stable working conditions after the temperature reaches the rated working condition.

[0028] It is conceivable that a drain port and a drain valve (not shown in the figure) can be provided on each group of experimental sections 1 to discharge the high-temperature medium in the experimental sections 1 after the experiment is completed.

[0029] In one embodiment, 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 test valve 4 and is used to connect with the test valve 4. One end of the connecting pipeline 14 is butt-joined with the experimental pipeline, and the other end is connected with the first main pipe and the corresponding second main pipe. The first switch valve 11 and the second switch valve 12 are arranged on the connecting pipeline 14.

[0030] In the specific implementation, since the caliber of the tested valve 4 is a standard caliber, the diameter of the butt-joint pipe 13 that is connected to the tested valve 4 should be adapted to the caliber of the tested valve 4 to simulate the real working environment; but since the medium in the experimental pipeline hardly moves, the diameter of the connecting pipe 14 can be made very small to save costs, and at the same time, the first switch valve 11 and the second switch valve 12 are arranged on the connecting pipe 14 with a smaller diameter, so that the first switch valve 11 and the second switch valve 12 can use a smaller valve, which further reduces the cost. Similarly, the first main pipe and the corresponding second main pipe can also use a smaller diameter.

[0031] In one embodiment, the experimental pipeline further includes a first exhaust pipe 15, one end of which is connected to the connecting pipeline 14, the other end of which is upward, and the vertical height of the end of the first exhaust pipe 15 is higher than the butt pipe 13 and the connecting pipeline 14, and the first exhaust pipe 15 is provided with a first exhaust valve 16 for controlling 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, thereby improving the experimental accuracy.

[0032] In one embodiment, 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 to detect internal leakage of the test valve 4 and conduct an isolation performance test of the valve.

[0033] In specific implementation, when conducting the isolation performance test of the valve, first close the first exhaust valve 16, and open the first switch valve 11 and the second switch valve 12 at the same time, so that the front and rear ends of the tested valve 4 are connected to the regulator 5, and the pressure difference between the front and rear ends will be balanced and equal to the pressure of the regulator 5, and then the tested valve 4 is in a closed state, the second switch valve 12 is closed and the first exhaust valve 16 is opened at the same time, and the exhaust port of the first exhaust pipe 15 is connected to the leak detection device, which can be a leak detection liquid level tube with scales marked on the liquid level tube for identifying the liquid level height. The front end of the tested valve 4 (the end connected to the regulator 5) is heated and pressurized, and the heater at the rear end of the tested valve 4 (the end connected to the first exhaust pipe 15) is kept in a closed state. Adjust the temperature and pressure before the valve to the rated working conditions; open the first exhaust valve 16 and keep the rear end of the valve full of water; record the medium temperature and pressure before and after the test valve 4; record the status of the test device and the test piece every 30 minutes; when the medium temperature at the rear end of the test valve 4 tends to be stable, start the leak detection timing, 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 conditions for 6 hours; when the high temperature and high pressure isolation performance test is about to end, adjust the medium temperature at the rear end of the test valve 4 to be basically the same as that at the beginning of the test and maintain it until the end of this section of the test; after the load 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 beginning of the test. The volume shown by the liquid level difference is the internal leakage of the valve.

[0034] In one embodiment, the second switch valve 12 is provided with a plurality of second switch valves 12, and the plurality of second switch valves 12 are connected in series to the connecting pipeline 14. Such a design can ensure that no medium enters the first exhaust pipe 15 through the second switch valve 12 when conducting the isolation performance test of the valve, thereby ensuring the experimental accuracy.

[0035] In one embodiment, two first exhaust valves 16 are provided, which are distributed in the upper and lower parts 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 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. This design makes it easier to discharge the gas in the experimental pipeline, and on the other hand, since the first exhaust valves 16 need to be opened and closed frequently, when the upper first exhaust valve 16 needs to be repaired and replaced, the lower first exhaust valve 16 and the second switch valve 12 are closed, that is, the upper first exhaust valve 16 can be repaired and replaced.

[0036] Of course, the first exhaust pipe 15 can also be vertically arranged between the connecting pipe 14 and the butt pipe 13 , and the two first exhaust valves 16 are arranged on the upper and lower sides of the connection point between the connecting pipe 14 and the first exhaust pipe 15 .

[0037] In one embodiment, the two ends of the test pipeline corresponding to the test valve 4 are respectively provided with a thermometer 6 for measuring temperature and a pressure gauge 7 for measuring pressure. With this design, the staff can know the temperature and pressure of the two ends of the current test valve 4 in real time through the thermometer 6 and the pressure gauge 7.

[0038] In one embodiment, two transfer chambers 17 are provided on the experimental pipeline, and the two transfer chambers 17 are respectively located at the 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. Such a design enables the device to be docked with the test valves 4 of different specifications to carry out experiments; and the joint pipe 18 here 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 medium demand of the test valve 4 at the moment of switching; and after the transfer chamber 17 is installed, the medium in the transfer chamber 17 can be used to meet the medium demand of the test valve 4 at the moment of switching, so the connecting pipeline 14 can be made thinner, and the docking pipeline 13 can be made short enough to reduce the footprint of the equipment.

[0039] In one embodiment, the top of the transfer chamber 17 is connected to a second exhaust pipe 171, and a second exhaust valve 172 is disposed on the second exhaust pipe 171; The top height of one end of each joint pipe 18 in the transfer chamber 17 is not higher than the top height of the experimental pipeline in the transfer chamber 17. This design allows the liquid level in the transfer chamber 17 to always be higher than the height of each joint pipe 18, and the bubbles will automatically float up into the transfer chamber 17, so that there are no 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.

[0040] In one embodiment, a buffer chamber 173 is formed in the transfer chamber 17 between the top of the liquid surface and the inner top wall of the transfer chamber 17. With this design, since fluctuations will be formed at both ends of the test valve 4 when it is opened and closed, the buffer chamber 173 is equivalent to a pressure stabilizing device, which can play a role in stabilizing pressure at the moment of opening and closing of the test valve, and can effectively balance the pressure fluctuations generated at the moment of opening and closing of the test valve 4.

[0041] It should be noted that, although the voltage stabilizer 5 is connected to both the first main pipe and the second main pipe, the voltage stabilizer 5 can balance the pressure fluctuations generated by the opening and closing of the test valve 4 when the valve action test is carried out. However, when the experimental pipeline is relatively short and the distance between two adjacent experimental pipelines is particularly close, there is a possibility of mutual influence. Once resonance occurs between multiple experimental pipelines, the experimental results will undoubtedly produce a large deviation.

[0042] In one embodiment, the heater is arranged in the transfer chamber 17. Such a design facilitates the installation and maintenance of the heater. The thermometer 6 and the pressure gauge 7 can also be arranged in the transfer chamber 17.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0044] It should be noted that if the embodiments of the invention involve directional indications (such as up and down), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). 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 invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such 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 and are respectively installed at the two ends of the corresponding test valve (4) of each experimental pipeline. Each heater can operate independently to heat the medium at the two ends of the test valve (4).

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 any one of claims 1 to 6, characterized in that: 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).

9. The high temperature and high pressure valve hot state test device according to claim 8, characterized in that: 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).

10. The high temperature and high pressure valve hot state test device according to claim 8, 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).

11. The high temperature and high pressure valve hot state test device according to claim 8, characterized in that: The heater is arranged in the transfer chamber (17).

12. 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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