High-temperature air valve leakage rate detection device

Abstract

The utility model provides a high-temperature air valve leakage rate detection device, which comprises a pressure stabilizing box, a heating box, an electric heater, a temperature sensor, a pressure sensor and the like, and realizes accurate quantitative detection of the leakage rate of a valve by simulating a high-temperature environment of + 400 DEG C to + 800 DEG C and combining a temperature control system. The problem that a traditional method cannot adapt to a high-temperature environment and cannot achieve accurate measurement is solved, the method has the advantages of being easy and convenient to operate, safe and reliable, the internal and external leakage rates of valves of different specifications can be effectively detected, and important technical support is provided for the nuclear power industry. In addition, a variable-frequency control fan, a high-precision flow meter, a graphite packing and the like are adopted, so that the stability and the sealing performance in the test process are ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the detection field of nuclear power valve, and relates to a high temperature air valve leakage amount detection device. BACKGROUND

[0002] Generally, the temperature range of nuclear power valve is-20~+80 DEG C, but in the extreme accident condition, the temperature of the field working condition can be as high as +400 DEG C~+800 DEG C, therefore, the valve should meet the use requirement of leakage amount in high temperature environment and within a certain time. At present, the high temperature valve is simulated by heat exchanger, and the highest test temperature is generally below +80 DEG C, which cannot reach the environmental temperature of nuclear power valve in extreme accident.

[0003] The leakage amount test is usually carried out by using the air tightness leak detector or the bubble leak detection method, the bubble leak detection method can only qualitatively determine the leakage, cannot accurately quantify the leakage amount, and the bubble leak detection cannot be used in high temperature environment. The air tightness leak detector is mostly used for small volume measured parts, because the temperature correction is not added, when the volume of the measured part is large and sensitive to temperature, the accuracy of the air tightness leak detector decreases, especially in high temperature environment, the pipeline and pressure measuring position of the air tightness leak detector are located outside the high and low temperature environment, and the accuracy and consistency of the result are very low.

[0004] The utility model patent with the publication number CN204027791U discloses a kind of air valve leakage amount testing device, the device provides compressed air to gas storage tank by air compressor, and compressed air is delivered to the left cavity of the valve to be tested by pipeline, simultaneously installs regulating valve and flowmeter on pipeline to control and measure gas flow, the pressure sensor on the valve to be tested is used to monitor pressure, while the right cavity is communicated with atmosphere by pipeline, and is equipped with cut-off valve and muffler. By reading the value of flowmeter, the leakage amount of the valve to be tested under specified pressure can be directly known, but it lacks adaptability to high temperature environment, and cannot carry out accurate leakage amount test under high temperature condition.

[0005] Therefore, the present application provides a kind of high temperature air valve leakage amount detection device, for testing valve accurately quantitative detection valve leakage amount in high temperature environment, operability is strong, efficiency is high and can simulate high temperature working condition and carry out quantitative detection. SUMMARY

[0006] In order to achieve the above purpose, the utility model provides a kind of high temperature air valve leakage amount detection device, solves the simulation of high temperature environment state and the quantitative detection of valve leakage amount.

[0007] To solve the above technical problems, the utility model adopts the technical scheme, a kind of high temperature air valve leakage detection device, including pressure stabilizing tank, the pressure stabilizing tank includes pressure stabilizing tank chamber, stand, crossbeam, main screw rod and hand lever;The side of the pressure stabilizing tank chamber is vertically provided with stand, and the upper portion of pressure stabilizing tank chamber is horizontally provided with crossbeam, and the right end of crossbeam is connected with the upper end of stand;Threaded hole is provided on the crossbeam, and main screw rod vertically passes through the threaded hole, and the upper end of main screw rod is provided with hole, and hand lever passes through the hole in the upper end of main screw rod;

[0008] Further, the upper portion of the pressure stabilizing tank chamber is provided with a heating tank, the heating tank is provided with an electric heater, one side of the electric heater is provided with a flange, the heating tank is provided with a threaded hole, the electric heater is fixed on the threaded hole of the heating tank by the flange, a bolt and a sealing gasket.

[0009] Further, the heating tank is provided with a heating tank frame outside, the heating tank is provided with a measured valve above, and the measured valve is fixed on the heating tank frame by a bolt, a nut and a gasket.

[0010] Further, the heating tank is further provided with a temperature sensor, the temperature sensor is provided with an external thread, and the temperature sensor is fixed on the heating tank by the thread of the temperature sensor, a sealing gasket and a threaded hole of the heating tank.

[0011] Further, a transition connecting plate is arranged between the measured valve and the heating tank, and the transition connecting plate is provided with a plurality of bolt holes with different sizes.

[0012] Further, the measured valve is provided with a blind plate above, and the blind plate is fixed on the measured valve by the hand lever and the main screw rod.

[0013] Further, the pressure stabilizing tank is provided with a pressure sensor, and the pressure sensor is connected with the inside of the pressure stabilizing tank and the main control system by electrical connection;The pressure sensor and the temperature sensor can be provided with multiple.

[0014] Further, the pressure stabilizing tank is provided with a main pipeline on the side, the end of the main pipeline is provided with a fan, the fan adopts frequency conversion control, and a stop valve, an overflow valve and an electric regulating valve two are sequentially arranged on the main pipeline in the direction of the fan air inlet, and the stop valve is arranged at the position of the fan air inlet.

[0015] Further, a sub-pipeline is arranged behind the overflow valve of the main pipeline, an electric regulating valve one and a high-precision flowmeter are sequentially arranged on the sub-pipeline, and the other end of the sub-pipeline is connected to the side of the pressure stabilizing tank;The high-precision flowmeter is connected with the main control system through signal line.

[0016] Further, graphite packing is arranged between the pressure stabilizing tank chamber and the heating tank, between the measured valve and the heating tank, and between the measured valve and the blind plate.

[0017] The utility model discloses the beneficial effect is:

[0018] 1, adopt intelligent temperature control system simulation high temperature test environment, temperature control precision is high, safe and reliable.

[0019] 2, can realize high temperature test environment to the valve leakage under the quantitative detection.

[0020] 3, operability is strong, and operation is simple, convenient and fast. DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be to the embodiment or prior art description needed to use the drawing briefly introduces, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0022] Figure 1 It is the high temperature air valve leakage detection device structure schematic diagram of the utility model.

[0023] Figure 2 It is the stable pressure tank structure schematic diagram of the utility model.

[0024] Figure 3 It is the heating tank structure schematic diagram of the utility model.

[0025] Figure 4 It is the measured air valve installation schematic diagram of the utility model.

[0026] In the drawing, 1. fan, 2. stop valve, 3. overflow valve, 4. main pipeline, 5. auxiliary pipeline, 6. electric regulating valve one, 7. high-precision flowmeter, 8. electric regulating valve two, 9. stable pressure tank, 9a. stable pressure tank chamber, 9b. stand, 9c. crossbeam, 9d. hand lever, 9e. main screw rod, 10. pressure sensor, 11. temperature sensor, 12. heating tank, 12a. heating tank frame, 12b. sealing gasket one, 12c. sealing gasket two, 12d. bolt one, 13. electric heater, 14. measured valve, 15. blind plate, 16. graphite packing, 17. main control system, 18. transition connecting plate, 19. bolt two, 20. nut, 21. gasket. DETAILED DESCRIPTION

[0027] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] As shown in Figures 1-4 The embodiment of the present application provides a high-temperature air valve leakage detection device, which can realize high-temperature environment simulation and leakage detection. Figure 1 In the embodiment, the thick solid line is a pipeline line, the thin solid line is a control line, and the dashed line is a signal line. In the embodiment, the pressure sensor 10, the temperature sensor 11 and the main control system 17 belong to the prior art. The main control system 17 adopts a mature single-chip microcomputer control system, can convert the pressure signal and the temperature signal into an electric signal, and transmits the electric signal to the single-chip microcomputer control system, so that real-time monitoring and adjustment of the pressure and the temperature are realized.

[0029] The high-temperature air valve leakage detection device of the embodiment comprises a pressure stabilizing tank 9, and the pressure stabilizing tank 9 comprises a pressure stabilizing tank chamber 9a, a stand column 9b, a cross beam 9c, a main screw rod 9e and a hand lever 9d. The stand column 9b is vertically arranged on the side of the pressure stabilizing tank chamber 9a, and the cross beam 9c is horizontally arranged above the pressure stabilizing tank chamber 9a. The right end of the cross beam 9c is connected with the upper end of the stand column 9b, and the stand column 9b is fixedly welded between the pressure stabilizing tank chamber 9a and the cross beam 9c. The pressure stabilizing tank 9 is a pressure storage device, which is used for simulating the pressure inside a pipeline, and the pressure is provided by a fan 1.

[0030] A threaded hole is arranged on the cross beam 9c, and the main screw rod 9e vertically penetrates through the threaded hole. A hole is arranged on the upper end of the main screw rod 9e, and the hand lever 9d rotates to drive the main screw rod 9e through the hole on the upper end of the main screw rod 9e. The main screw rod 9e is matched with the threaded hole on the cross beam 9c, so that the upward and downward movement of the main screw rod 9e is realized.

[0031] A heating tank 12 is arranged above the pressure stabilizing tank chamber 9a, and an electric heater 13 is arranged in the heating tank 12. One side of the electric heater 13 is provided with a flange, and a threaded hole is arranged on the heating tank 12. The electric heater 13 is fixed on the threaded hole of the heating tank 12 through the flange, a bolt 12d and a sealing gasket 12c.

[0032] A temperature sensor 11 is further arranged in the heating tank 12. The temperature sensor 11 is provided with external threads, and the temperature sensor 11 is fixed on the heating tank 12 through the threads of the temperature sensor 11, a sealing gasket 12b and a threaded hole of the heating tank 12. The high-temperature environment inside the pipeline can be simulated through the heating tank 12, and the temperature can be controlled through the temperature sensor 11 and the main control system 17.

[0033] The heating tank 12 is externally provided with a heating tank frame 12a, and the measured valve 14 is installed above the heating tank 12 and fixed on the heating tank frame 12a through the bolt two 19, the nut 20 and the gasket 21.

[0034] The transition connecting plate 18 is arranged between the measured valve 14 and the heating tank 12, and the transition connecting plate 18 is provided with a plurality of bolt holes with different sizes, so that the transition connecting plate 18 can adapt to different measured valves 14 when the specifications of the measured valves 14 are different, and the measured valves 14 with different sizes and the heating tank 12 are conveniently connected.

[0035] The blind plate 15 is arranged above the measured valve 14, the hand lever 9d can drive the rotating main screw 9e to move downward until the blind plate 15 is pressed, and the pressure is transmitted downward to press the heating tank 12, and the blind plate 15 is pressed when the rotating main screw 9e is reversely rotated to move upward. The blind plate 15 is fixed through the hand lever 9d and the main screw 9e, so that the blind plate 15 can be quickly disassembled and operated simply.

[0036] The blind plate 15 can ensure that the entire test system is in a closed state, when the blind plate 15 is installed, the blades of the measured valve 14 are in an open state, the fan 1 is opened, the stop valve 2, the electric regulating valve two 8 and the electric regulating valve one 6 are opened, the air volume enters the pressure stabilizing tank 9 through the main pipeline 4 and the auxiliary pipeline 5, the pressure stabilizing tank 9 is communicated with the heating tank 12 and the measured valve 14, the system pressure is detected in real time through the pressure sensor 10, when the pressure reaches the measured pressure, the electric regulating valve two 8 is closed, the main pipeline is closed, the electric regulating valve one 6 remains in an open state, at this time, only the auxiliary pipeline can be used to supplement the air volume for the system, and the actual passing air volume is detected through the high-precision flow meter 7, that is, the valve leakage is detected; when the blind plate 15 is removed, the blades of the measured valve 14 are closed to form a closed state, and at this time, the valve leakage is the internal leakage.

[0037] The main control system 17 is connected with the fan 1, the overflow valve 3, the electric regulating valve one 6, the high-precision flow meter 7, the electric regulating valve two 8, the pressure sensor 10, the temperature sensor 11 and the electric heater 13.

[0038] The pressure sensor 10 is installed on the pressure stabilizing tank 9, and the pressure sensor 10 is communicated with the inside of the pressure stabilizing tank 9 and the main control system 17 through electrical connection.

[0039] The pressure sensor 10 and the temperature sensor 11 are used to detect the test pressure and temperature inside the pressure stabilizing tank 9 and the heating tank 12 in real time, and transmit the pressure and temperature signals to the main control system 17, so as to realize accurate control of the test temperature and the test pressure. The pressure sensor 10 and the temperature sensor 11 can be provided in multiple numbers to detect the pressure and temperature at different positions, thereby improving the accuracy of equipment detection.

[0040] The electric heater 13 is an electric heater composed of high-temperature resistance wires, and the number and temperature range of the electric heater 13 can be adjusted according to actual requirements. The temperature sensor 11 performs accurate temperature measurement, and the main control system 17 controls the start and stop of the electric heater 13 through the temperature provided by the temperature sensor 11, so as to realize intelligent and accurate control of the simulated high-temperature test environment. The electric heater 13 and the temperature sensor 11 are used for temperature control, which is simple, convenient and fast.

[0041] The main pipeline 4 is installed on the side of the pressure stabilizing tank 9, and the end of the main pipeline 4 is provided with the fan 1. The fan 1 is controlled by frequency conversion, and provides air volume for the detection device and pressure for the system. When the main control system 17 controls the test pressure, the fan 1 can continuously supplement air volume.

[0042] The fan 1 is provided with the stop valve 2, the overflow valve 3 and the electric regulating valve two 8 on the main pipeline 4 in sequence.

[0043] The stop valve 2 is installed at the fan 1 air outlet position, and is used as the air volume on-off switch of the detection device, and is used to close and open the air volume of the whole system.

[0044] The overflow valve 3 is installed on the main pipeline, and is used for adjusting the pressure of the main pipeline.

[0045] The main pipeline 4 is provided with the auxiliary pipeline 5 after the overflow valve 3. The electric regulating valve one 6 and the high-precision flowmeter 7 are installed on the auxiliary pipeline 5 in sequence, and the other end of the auxiliary pipeline 5 is connected to the side of the pressure stabilizing tank 9. The high-precision flowmeter 7 is connected to the main control system 17 through a signal line. The high-precision flowmeter 7 is used for accurately detecting the gas flow, and transmits the signal to the main control system 17, so as to realize quantitative and accurate real-time measurement of the internal and external leakage of the valve in the high-temperature test environment.

[0046] The main control system 17 controls the start and stop of the electric regulating valve one 6 and the electric regulating valve two 8 through the pressure signal, and adjusts the pressure of the pressure stabilizing tank 9. The electric regulating valve two 8 is used for main control of the pressure of the pressure stabilizing tank 9, and the electric regulating valve one 6 is used for fine adjustment of the pressure of the pressure stabilizing tank 9.

[0047] The main pipeline 4 provides large air volume, and the auxiliary pipeline 5 has small diameter and is used for pressure fine adjustment. When the electric regulating valve two 8 is closed during test collection of flow data, the auxiliary pipeline 5 maintains pressure balance.

[0048] When the valve has internal or external leakage, the pressure of the pressure stabilizing tank 9 will decrease, and the main control system 17 receives the pressure drop signal and supplements the gas to the pressure stabilizing tank 9 through the opening of the electric regulating valve 6 on the auxiliary pipeline 5, so that the pressure stabilizing tank 9 can maintain stable pressure. Through remote intelligent detection, it is more safe and reliable and has higher operability.

[0049] The graphite packing 16 is arranged between the pressure stabilizing tank chamber 9a and the heating tank 12, between the measured valve 14 and the heating tank 12, and between the measured valve 14 and the blind plate 15 for sealing.

[0050] In the embodiment, all the graphite packing 16 can be replaced by other high-temperature-resistant materials.

[0051] Each embodiment in the specification is described in a related manner, and the same and similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0052] The above only describes the preferred embodiment of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model are included in the protection scope of the utility model.

Claims

1. A high-temperature air valve leakage amount detection device characterized by comprising: Including the stabilizing box (9), the stabilizing box (9) includes stabilizing box room (9a), stand (9b), crossbeam (9c), main screw rod (9e) and hand lever (9d);The side of stabilizing box room (9a) is vertically provided with stand (9b), and the upper portion of stabilizing box room (9a) is horizontally provided with crossbeam (9c), and the right end of crossbeam (9c) is connected with the upper end of stand (9b); The threaded hole is arranged on the crossbeam (9c), the main screw rod (9e) vertically passes through the threaded hole, and the upper end of the main screw rod (9e) is provided with a hole, and the hand lever (9d) passes through the hole in the upper end of the main screw rod (9e); The heating box (12) is arranged above the stabilizing box room (9a), the electric heater (13) is arranged in the heating box (12), one side of the electric heater (13) is provided with a flange, the threaded hole is arranged on the heating box (12), and the electric heater (13) is fixed on the threaded hole of the heating box (12) through the flange, a bolt (12d) and a sealing gasket (12c). The heating box (12) is externally provided with a heating box frame (12a), the measured valve (14) is installed above the heating box (12), and the measured valve (14) is fixed on the heating box frame (12a) through a bolt (19), a nut (20) and a gasket (21).

2. The high temperature damper leakage detection device of claim 1, wherein, The temperature sensor (11) is further arranged in the heating box (12), the temperature sensor (11) is provided with external threads, and the temperature sensor (11) is fixed on the heating box (12) through the threads of the temperature sensor (11), a sealing gasket (12b) and the threaded hole of the heating box (12).

3. The high temperature damper leakage detection device of claim 1, wherein, The transition connecting plate (18) is arranged between the measured valve (14) and the heating box (12), and the transition connecting plate (18) has a plurality of bolt holes with different sizes.

4. The high temperature damper leak detection device of claim 1, wherein, The blind plate (15) is arranged above the measured valve (14), and the blind plate (15) is fixed above the measured valve (14) through the hand lever (9d) and the main screw rod (9e).

5. The high temperature damper leak detection device of claim 1, wherein, The pressure sensor (10) is installed on the stabilizing box (9), and the pressure sensor (10) is connected with the inside of the stabilizing box (9) and the main control system (17) through electrical connection;The pressure sensor (10) and the temperature sensor (11) can be arranged in plurality.

6. The high temperature damper leak detection device of claim 1, wherein, The main pipeline (4) is installed on the side of the stabilizing box (9), the fan (1) is installed at the end of the main pipeline (4), the fan (1) is controlled by frequency conversion, the fan (1) is installed on the main pipeline (4) in sequence from the air inlet direction, and the stop valve (2), the overflow valve (3) and the electric regulating valve (8) are installed on the main pipeline (4) in sequence.

7. The high temperature damper leak detection apparatus of claim 6, wherein, The auxiliary pipeline (5) is installed after the overflow valve (3) on the main pipeline (4), the electric regulating valve (6) and the high-precision flowmeter (7) are installed on the auxiliary pipeline (5) in sequence, and the other end of the auxiliary pipeline (5) is connected to the side of the stabilizing box (9);The high-precision flowmeter (7) is connected with the main control system (17) through a signal line.

8. The high temperature air valve leakage detection apparatus of claim 1, wherein The graphite packing (16) is arranged between the stable pressure box chamber (9a) and the heating box (12), between the measured valve (14) and the heating box (12), and between the measured valve (14) and the blind plate (15).

Images