Internal and external thermal combination test device and method thereof

Abstract

The invention discloses an internal and external thermal combination test device and a method thereof, and relates to the technical field of high-temperature tests. One side of the to-be-tested valve is communicated with an internal heating system, and the internal heating system comprises a heat exchange and baffling assembly, a heating pipe section and an electromagnetic induction heating assembly which are sequentially arranged from inside to outside; the electromagnetic induction heating assembly is wound on the outer wall of the heating pipe section and used for heating air flow in the heating pipe section, and the heat exchange and baffling assembly increases the heat exchange area in the heating pipe section and is used for evenly heating the air flow in the heating pipe section. According to the invention, the electromagnetic induction heating assembly can allow the air flow in the heating pipe section to be heated, and any temperature required by the test can be controlled by adjusting the power, so that the working efficiency is greatly improved. According to the heat exchange and baffling assembly, the heat exchange area is increased in the heating pipe, the gas flow speed and direction are controlled, the gas flow in the pipe is evenly heated, and the heating effect is further enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature test, and particularly relates to a test device and method combining internal and external heat. Background Art

[0002] With the development of industries such as nuclear power and petrochemical, the application fields of high-temperature valves are becoming more and more extensive, and the market demand is also increasing year by year. The hot-state test system of high-temperature valves is an essential equipment in the production and performance test links of high-temperature valves.

[0003] During the hot-state test of the valve, it is necessary to heat the valve to be tested to a test temperature of 300°C to 800°C. Currently, there are two application heating methods: external heating and internal heating.

[0004] The external heating method is to attach ceramic heating sheets to the outer surface of the valve to be tested or place the valve to be tested in an industrial heating furnace for heating. Although this method can obtain a relatively high test temperature, the temperature gradient of the valve is completely opposite to that of the actual working condition, and it cannot truly reflect the sealing performance of the valve under high-temperature conditions.

[0005] The internal heating method is to heat the test gas to the test temperature through a pipeline heater and then flow it through the inner cavity of the valve to be tested to circulate and heat the valve. This method makes the temperature gradient of the valve consistent with the actual working condition, making up for the defects of the external heating method. However, since the current heating method of the pipeline heater uses resistance wire heating, the heating efficiency is low, and the heat capacity of the valve to be tested is very large, making the entire heating process very slow and the test efficiency low.

[0006] Currently, during the hot-state test of valves, there is no system that designs a device that can meet the temperature gradient of the actual working condition and efficiently and controllably provide high-temperature test gas. Each unit has phenomena such as unreasonable test processes, low test work efficiency, and poor safety during the hot-state test of valves. Summary of the Invention

[0007] The purpose of the present invention is to provide a test device, a test method, and a temperature control strategy that can meet the temperature gradient of the actual working condition and efficiently and controllably perform the hot-state performance test of the valve during the hot-state test of high-temperature valves. The use of this device in the hot-state test system of high-temperature valves can not only ensure the temperature gradient of the valve to be tested under actual working conditions, but also efficiently and controllably heat valves to be tested of different specifications, ensuring their test safety under high temperature and high pressure, and having great practical significance for the hot-state performance test of high-temperature valves.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A test device combining internal and external heat includes a valve to be tested, and an external heat system is arranged outside the valve to be tested;

[0010] The external heating system includes a left furnace body and a right furnace body that can move horizontally. When they are closed, they form a sealed heating space, and when they are separated, they are used for the disassembly and assembly of the valve to be tested.

[0011] One side of the valve to be tested is connected to an internal heating system, which includes a heat exchange and baffle component, a heating pipe section, and an electromagnetic induction heating component arranged in sequence from the inside to the outside.

[0012] The electromagnetic induction heating component is wound around the outer wall of the heating pipe section to heat the gas flow inside the heating pipe section. The heat exchange and baffle component increases the heat exchange area inside the heating pipe section to evenly heat the gas flow inside the pipe.

[0013] As a further solution of the present invention: the heating pipe section includes a heating pipe, both ends of the heating pipe are provided with end caps, an air outlet riser and an air inlet riser are respectively arranged above and below the heating pipe, a temperature transmitter interface is arranged on one side of the air outlet riser, and a pressure transmitter interface is arranged on one side of the air inlet riser.

[0014] As a further solution of the present invention: the heat exchange and baffle component includes two starting and ending ends and a plurality of baffle ends connected in the middle.

[0015] As a further solution of the present invention: the starting and ending ends include two support rings, and at least four support shafts I are installed between the end faces of the two support rings.

[0016] As a further solution of the present invention: the baffle end includes two support rings, and at least two support shafts II, one support shaft III, and one support shaft IV are installed between the end faces of the two support rings;

[0017] A number of baffle plates are arranged in a staggered manner up and down between the end faces of the two support rings.

[0018] As a further solution of the present invention: a plurality of shaft holes are arranged on the end faces of the baffle plates for the ends of the support shafts II, support shaft III, and support shaft IV to be inserted and connected.

[0019] As a further solution of the present invention: the electromagnetic induction heating component includes an isolation layer, a winding layer, and an outer wrapping layer. The winding layer is evenly and spirally wound around the outside of the isolation layer, and the outer wrapping layer is wrapped outside the winding layer.

[0020] As a further solution of the present invention: it further includes a top drive device, which is arranged above the valve to be tested and is used to drive the opening and closing of the valve to be tested.

[0021] As a further solution of the present invention: The top drive device includes a gantry four-axis system, a top drive output shaft, a torque sensor, and a plurality of couplings. The gantry four-axis system is connected with the top drive output shaft, which is used to drive the top drive output shaft to move and rotate along the X, Y, and Z axes. The top drive output shaft is connected to one end of the torque sensor through a coupling, the other end of the torque sensor is connected to one end of the valve stem sleeve through a coupling, and the other end of the valve stem sleeve is connected to the valve stem.

[0022] As a further solution of the present invention: A method for an internal and external heat combined test device specifically includes the following steps:

[0023] Step 1: First, install the valve to be tested in the furnace body, and then the top drive device opens the valve to be tested;

[0024] Step 2: Connect the test gas to the intake riser, connect both ends of the winding layer to the power supply to make it energized, generate an alternating magnetic field, and the heating tube generates eddy current heat under electromagnetic induction in the magnetic field, quickly heating the air flow in the heating tube; The air flow sequentially enters the heating tube, one start and end section, several baffle sections, and one start and end section from the intake riser, is uniformly heated and then flows out from the outlet riser into the valve to be tested to heat the valve, and then is discharged from the leakage detection section pressure relief valve;

[0025] Step 3: External heat heating: Turn on the heating power supplies of the right furnace body, the left furnace body, and the furnace base, and heat the valve to be tested by means of thermal radiation;

[0026] Step 4: Pressurization process: When the temperature inside the valve reaches the test temperature requirement, close the valve to be tested through the top drive device; Pressurize the medium output by the medium gas source to the test required pressure through a supercharger and stabilize the pressure.

[0027] Advantages of the present invention:

[0028] The electromagnetic induction heating component provided in the present invention can allow the air flow in the heating tube section to be heated, and by adjusting the power, any test required temperature can be controlled, thus greatly improving the work efficiency.

[0029] The heat exchange and baffle component in the present invention increases the heat exchange area in the heating tube, controls the gas flow rate and direction, enables the air flow in the tube to be uniformly heated, and further strengthens the heating effect.

[0030] The heating method combining internal heat and external heat of the present invention can make the temperature gradient of the valve under test consistent with the working conditions, meeting the requirements of actual applications. Description of the drawings

[0031] The following further describes the present invention with reference to the drawings.

[0032] Figure 1 It is a front view structural schematic diagram of the system composition of the present invention;

[0033] Figure 2 is a top view structural schematic diagram of the system of the present invention;

[0034] Figure 3 is a structural schematic diagram of the internal heat system of the present invention;

[0035] Figure 4 is a structural schematic diagram of the heating pipe section of the present invention;

[0036] Figure 5 is a structural schematic diagram of the heat exchange and baffle component of the present invention;

[0037] Figure 6 is a structural schematic diagram of the start and end sections in the heat exchange and baffle component of the present invention;

[0038] Figure 7 is a side view structural schematic diagram of the start and end sections in the heat exchange and baffle component of the present invention;

[0039] Figure 8 is a structural schematic diagram of the baffle section in the heat exchange and baffle component of the present invention;

[0040] Figure 9 is a structural schematic diagram of the baffle plate in the heat exchange and baffle component of the present invention;

[0041] Figure 10 is a side view structural schematic diagram of the baffle section in the heat exchange and baffle component of the present invention;

[0042] Figure 11 is a structural schematic diagram of the electromagnetic induction heating component of the present invention.

[0043] In the figure: 1. Top drive device; 2. Right furnace body; 3. Left furnace body; 4. Valve to be tested; 5. Support; 6. Furnace base; 7. Control system; 8. Acquisition system; 9. Leak detection system; 10. Leak detection section pipeline; 11. Leak detection section pressure relief valve; 12. Boosting section pipeline; 13. Boosting section pressure relief valve; 14. Internal heat system; 15. Isolation valve; 16. Booster; 17. Medium gas source; 14A. Heating pipe section; 14B. Heat exchange and baffle component; 14C. Electromagnetic induction heating component; 14A1. Plug; 14A2. Pressure transmitter interface; 14A3. Inlet riser; 14A4. Heating pipe; 14A5. Temperature transmitter interface; 14A6. Outlet riser; 14B1. Start and end sections; 14B2. Baffle section; 14B101. Support ring; 14B102. Support shaft one; 14B201. Baffle plate; 14B202. Support shaft four; 14B203. Support shaft two; 14B204. Support shaft three; 14C1. Isolation layer; 14C2. Winding layer; 14C3. Outer wrapping layer. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0045] The test device measures the temperature inside the valve of the valve under test 4, which is the temperature of the gas inside the valve under test 4, and is affected by two heating methods: internal heating and external heating. For the internal heating method, after the medium is heated by the internal heating system 14, the temperature rises. When passing through the pressurization section pipeline 12 and the valve under test 4, heat is transferred to the pressurization section pipeline 12 and the valve under test 4 through convective heat transfer, causing their temperatures to rise and its own temperature to drop. For the external heating method, the furnace temperature transfers heat to the valve body temperature through thermal radiation, the valve body temperature transfers heat to the inner wall of the valve through heat conduction, and the inside of the valve then transfers heat to the temperature inside the valve through thermal radiation. How to control the temperature inside the valve to rise at a certain rate is extremely complex and difficult.

[0046] Please refer to Figures 1 to 2 As shown, the present invention is a test device combining internal and external heating, which is used to meet the temperature gradient of the actual working conditions and efficiently and controllably perform the valve hot performance test device and test method. It can quickly heat the test gas in the high-temperature valve hot test system, heat the valve under test from the inside until the test temperature, and the entire heating process of the valve conforms to the temperature gradient distribution of the actual working conditions. It has high heating efficiency and controllable heating temperature, and can simulate the real temperature environment of the valve on-site working conditions, including the top drive device 1, the right furnace body 2, the left furnace body 3, the valve under test 4, the support 5, the furnace base 6, the control system 7, the acquisition system 8, the leak detection system 9, the leak detection section pipeline 10, the leak detection section pressure relief valve 11, the pressurization section pipeline 12, the pressurization section pressure relief valve 13, the internal heating system 14, the isolation valve 15, the supercharger 16, the medium gas source 17, etc.

[0047] The support 5 is placed on the furnace base 6, the valve under test 4 is fixed on the support 5, the inlet end of the valve under test 4 is connected to the pressurization pipeline 12, and the leak detection end is connected to the leak detection section pipeline 10. The other end of the leak detection section pipeline 10 is connected to the leak detection system 9, and a leak detection section pressure relief valve 11 is provided on the leak detection section pipeline 10. The medium gas source 17 is connected to the inlet of the supercharger 16, the outlet of the supercharger 16 is connected to the inlet of the isolation valve 15, the outlet of the isolation valve 15 is connected to the inlet of the internal heating unit 14, the outlet of the internal heating system 14 is connected to the other end of the pressurization section pipeline 12, and a pressurization section pressure relief valve 13 is provided on the pressurization section pipeline 12.

[0048] The acquisition system 8 acquires the physical quantity parameters during the test process: ambient temperature, furnace temperature, valve body temperature, temperature inside the valve, valve cover temperature, valve stem temperature, driver temperature; gas cylinder pressure, suction pressure, driver pressure, test pressure, leak detection pressure, instantaneous leakage rate, instantaneous torque, opening of the valve under test, etc.

[0049] The control system 7 controls the entire test process according to the test requirements, including temperature increase control, pressure increase control, opening and closing control of the valve under test, leak rate monitoring control, etc. The leak detection system 9 is used to detect the leakage situation of the valve, which is a conventional technology and will not be elaborated here.

[0050] Refer to Figures 3 to 11 as shown;

[0051] An external heat system is provided outside the valve 4 to be tested; the external heat system includes a left furnace body 3, a right furnace body 2 and a furnace base 6. The furnace base 6 is fixed, and the left and right furnace bodies can move horizontally respectively. Rollers are provided at the bottoms of the left furnace body 3 and the right furnace body 2, similar to car wheels, to drive their movement. When they are closed, a closed heating space is formed, and when separated, it is convenient to install the valve 4 to be tested on the furnace base. Electric heating wires are arranged on the left furnace body 3, the right furnace body 2 and the furnace base 6 to achieve heating;

[0052] One side of the valve 4 to be tested is connected to an internal heat system 14. The internal heat system 14 includes a heat exchange and flow deflection component 14B, a heating pipe section 14A and an electromagnetic induction heating component 14C arranged in sequence from inside to outside;

[0053] The electromagnetic induction heating component 14C is wound around the outer wall of the heating pipe section 14A to heat the air flow inside the heating pipe section 14A. The heat exchange and flow deflection component 14B increases the heat exchange area inside the heating pipe section 14A, so that the air flow inside the pipe is further efficiently heated and the direction and speed of the air flow are controlled.

[0054] The heating pipe section 14A is horizontally arranged, and the air inlet and outlet are respectively arranged at both ends of the heating pipe section. Specifically, it includes a heating pipe 14A4. Plugs 14A1 are provided at both ends of the heating pipe 14A4. The air inlet riser 14A3 is vertically arranged below the heating pipe 14A4, and the air outlet riser 14A6 is vertically arranged above the heating pipe 14A4. The pressure transmitter interface 14A2 is arranged on one side of the air inlet, and the temperature transmitter interface 14A5 is arranged on one side of the air outlet.

[0055] The heat exchange and flow deflection component 14B is composed of two start and end ends 14B1 and multiple flow deflection ends 14B2 connected together.

[0056] The start and end terminal 14B1 includes two support rings 14B101. Four first support shafts 14B102 are installed between the end faces of the two support rings 14B101. Four shaft holes are evenly distributed on the upper end face of the support ring 14B101 for the ends of the four first support shafts 14B102 to be inserted and connected.

[0057] The baffle end 14B2 is composed of 2 support rings 14B101, 6 baffle plates 14B201, 10 second support shafts 14B203, 2 third support shafts 14B204, and 4 fourth support shafts 14B202. At least two second support shafts 14B203, one third support shaft 14B204, and one fourth support shaft 14B202 are installed between the end faces of the two support rings 14B101;

[0058] A number of baffle plates 14B201 are arranged in a vertically staggered manner between the end faces of the two support rings 14B101.

[0059] Three shaft holes are evenly distributed on the end face of the baffle plate 14B201 for the ends of the second support shaft 14B203, the third support shaft 14B204, and the fourth support shaft 14B202 to be inserted and connected.

[0060] The electromagnetic induction heating assembly 14C includes an isolation layer 14C1, a winding layer 14C2, and an outer covering layer 14C3. The thickness of the isolation layer 14C1 is selected according to the frequency of electromagnetic induction and tightly wrapped around the outer wall of the heating pipe 14A4. The winding layer 14C2 is evenly and spirally wound around the outside of the isolation layer 14C1 by a cloud busbar according to the inductance intensity. The outer covering layer 14C3 is wrapped outside the winding layer 14C2.

[0061] It further includes a top drive device which is arranged above the valve to be tested 4 and is used to drive the opening and closing of the valve to be tested 4.

[0062] The top drive device includes a gantry four-axis system, a top drive output shaft, a torque sensor, and a plurality of couplings. The top drive output shaft is connected to the gantry four-axis system and is used to drive the top drive output shaft to move along the X, Y, and Z axes and rotate. One end of the top drive output shaft is connected to one end of the torque sensor through a coupling. The other end of the torque sensor is connected to one end of the valve stem sleeve through a coupling. The other end of the valve stem sleeve is connected to the valve stem. The valve stem penetrates through the furnace body.

[0063] The manufacturing process of the internal heat system 14:

[0064] First, weld the intake riser 14A3, the exhaust riser 14A6, the pressure transmitter interface 14A2, and the temperature transmitter interface 14A5 on the heating pipe 14A4 as Figure 3 shown.

[0065] Second, install the two support rings 14B101 and the four support shafts 14B102 as Figure 6Weld and assemble the start and end section 14B1.

[0066] III. Weld and assemble two support rings 14B101, six baffle plates 14B201, ten support shafts 214B203, two support shafts 314B204, and four support shafts 414B202 in accordance with Figure 8 to form the baffle section 14B2.

[0067] IV. In accordance with the principle that two start and end sections 14B1 are at both ends, several baffle sections 14B2 are in the middle, and each adjacent baffle section 14B2 is connected head to tail or tail to tail, weld and assemble them into the heat exchange and baffle assembly 14B as Figure 5 shown.

[0068] V. Install the heat exchange and baffle assembly 14B into the heating tube 14A4, and weld their two end faces into one body.

[0069] VI. Weld and assemble two blanking covers 14A1 in accordance with Figure 4 shown.

[0070] VII. In accordance with Figure 11 shown, successively wrap one layer of isolation layer 14C1, one layer of winding layer 14C2, and one layer of outer wrapping layer 14C3 on the outer surface of the heating tube section 14A.

[0071] A method for an internal and external heat combined test device specifically includes the following steps:

[0072] Step 1: First, install the valve to be tested 4 in the furnace body, and then the top drive device 1 opens the valve to be tested 4;

[0073] Step 2: Connect the test gas to the intake riser 14A3, connect both ends of the winding layer 14C2 to the power supply to make it energized, generate an alternating magnetic field, the heating tube 14A4 generates eddy current heat under electromagnetic induction in the magnetic field, and quickly heats the air flow in the heating tube 14A4; the air flow sequentially enters the heating tube 14A4, one start and end section 14B1, several baffle sections 14B2, and one start and end section 14B1 from the intake riser 14A3, is uniformly heated and then flows out from the outlet riser 14A6 into the valve to be tested 4 to heat the valve, and then is discharged from the leak detection section pressure relief valve 11;

[0074] Step 3: External heat heating: Turn on the heating power supplies of the right furnace body 2, left furnace body 3, and furnace base 6, and heat the valve to be tested 4 by means of thermal radiation;

[0075] Step 4: Pressurization process: When the temperature inside the valve reaches the test temperature requirement, close the valve to be tested 4 through the top drive device 1; pressurize the medium output by the medium gas source 17 to the test required pressure through the supercharger 16 and stabilize the pressure;

[0076] Step Five: Leak Detection Process: When there is a leak in the valve under test 4, the leaked medium enters the leak detection system 9 through the leak detection section pipeline 10 for cumulative calculation of the leak rate.

[0077] The above has described in detail an embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. An experimental device with combined internal and external heating, comprising a valve to be measured (4), characterized in that, An external heating system is provided outside the valve (4) to be measured. The external heating system includes a left furnace body (3) and a right furnace body (2) that can move horizontally. When they are closed, they form a sealed heating space, and when they are separated, they are used for the disassembly and assembly of the valve (4) to be measured. One side of the valve (4) to be measured is connected to an internal heating system (14). The internal heating system (14) includes a heat exchange and baffle component (14B), a heating pipe section (14A), and an electromagnetic induction heating component (14C) arranged in sequence from inside to outside. The electromagnetic induction heating component (14C) is wound around the outer wall of the heating pipe section (14A) to heat the air flow inside the heating pipe section (14A). The heat exchange and baffle component (14B) increases the heat exchange area inside the heating pipe section (14A) to evenly heat the air flow inside the pipe.

2. The test device with combined internal and external heat as claimed in claim 1, wherein, The heating pipe section (14A) includes a heating pipe (14A4). Both ends of the heating pipe (14A4) are provided with end caps (14A1). An air outlet riser (14A6) and an air inlet riser (14A3) are respectively arranged above and below the heating pipe (14A). A temperature transmitter interface (14A5) is arranged on one side of the air outlet riser (14A6), and a pressure transmitter interface (14A2) is arranged on one side of the air inlet riser (14A3).

3. The test device with combined internal and external heat according to claim 1, characterized in that The heat exchange and baffle component (14B) includes two start and end ends (14B1) and a plurality of baffle ends (14B2) connected in the middle.

4. The test device with combined internal and external heat according to claim 3, characterized in that, The start and end ends (14B1) include two support rings (14B101), and at least four support shafts one (14B102) are installed between the end faces of the two support rings (14B101).

5. The test device with combined internal and external heat according to claim 3, characterized in that, The baffle ends (14B2) include two support rings (14B101), and at least two support shafts two (14B203), one support shaft three (14B204), and one support shaft four (14B202) are installed between the end faces of the two support rings (14B101). A plurality of baffle plates (14B201) are arranged in a vertically staggered manner between the end faces of the two support rings (14B101).

6. The test device with combined internal and external heat as described in claim 5, wherein End faces of the baffle plates (14B201) are provided with a plurality of shaft holes for the ends of the support shafts two (14B203), support shaft three (14B204), and support shaft four (14B202) to be inserted and connected.

7. The test device with combined internal and external heat as described in claim 1, characterized in that, The electromagnetic induction heating component (14C) includes an isolation layer (14C1), a winding layer (14C2), and an outer wrapping layer (14C3). The winding layer (14C2) is evenly and spirally wound outside the isolation layer (14C1), and the outer wrapping layer (14C3) is wrapped outside the winding layer (14C2).

8. The test device with combined internal and external heat according to claim 1, characterized in that, It also includes a top drive device (1). The top drive device (1) is arranged above the valve (4) to be measured and is used to drive the opening and closing of the valve (4) to be measured.

9. An experimental device with combined internal and external heating according to claim 8, characterized in that, The top drive device (1) includes a gantry four-axis system, a top drive output shaft, a torque sensor, and multiple couplings. The gantry four-axis system is connected with the top drive output shaft, which is used to drive the top drive output shaft to move and rotate along the X, Y, and Z axes. The top drive output shaft is connected to one end of the torque sensor through a coupling, the other end of the torque sensor is connected to one end of the valve stem sleeve through a coupling, and the other end of the valve stem sleeve is connected to the valve stem.

10. A method for a test device with combined internal and external heating, characterized in that, The test device with combined internal and external heating according to any one of claims 1-9 is adopted, and specifically includes the following steps: Step 1: First, install the valve to be tested (4) in the furnace body, and then the top drive device (1) opens the valve to be tested (4); Step 2: Connect the test gas to the intake riser (14A3), connect both ends of the winding layer (14C2) to the power supply to make it energized to generate an alternating magnetic field. The heating tube (14A4) generates eddy current heat under electromagnetic induction in the magnetic field, and quickly heats the air flow in the heating tube (14A4); the air flow sequentially enters the heating tube (14A4), one start and end section (14B1), several baffle sections (14B2), and one start and end section (14B1) from the intake riser (14A3), is uniformly heated and then flows out from the outlet riser (14A6) and enters the valve to be tested (4) to heat the valve, and then is discharged from the leak detection section pressure relief valve (11); Step 3: External heat heating: Turn on the heating power supplies of the right furnace body (2), the left furnace body (3), and the furnace base (6), and heat the valve to be tested (4) by means of thermal radiation; Step 4: Pressurization process: When the temperature inside the valve reaches the test temperature requirement, close the valve to be tested (4) through the top drive device (1); pressurize the medium output by the medium gas source (17) to the test required pressure through the supercharger (16) and stabilize the pressure.

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