CN213516203U - Device for detecting sealing performance of high-voltage electrode sleeve of auxiliary steam boiler - Google Patents
Device for detecting sealing performance of high-voltage electrode sleeve of auxiliary steam boiler Download PDFInfo
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- CN213516203U CN213516203U CN202021912720.2U CN202021912720U CN213516203U CN 213516203 U CN213516203 U CN 213516203U CN 202021912720 U CN202021912720 U CN 202021912720U CN 213516203 U CN213516203 U CN 213516203U
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Abstract
The utility model discloses an auxiliary steam boiler high-voltage electrode sleeve sealing nature detection device, including last pressure-bearing cylinder, go up pressure-bearing cylinder and lower pressure-bearing cylinder fixed connection, the sub-unit connection electrode sleeve pipe that awaits measuring of lower pressure-bearing cylinder, the electrode sleeve pipe's that awaits measuring lower extreme is connected with the electrode base, the conducting rod sets up in the cavity in the middle of lower pressure-bearing cylinder and the electrode sleeve pipe that awaits measuring, the bottom and the electrode base of conducting rod are connected, the top of conducting rod runs through in the dish spring, the conducting rod bolt is located dish spring top, the conducting rod bolt all is located the cavity of pressure-bearing cylinder with the dish spring, the top of going up pressure-bearing cylinder is connected with pressure-bearing cylinder and outlet valve even pipe, it is connected with the outlet valve with outlet valve even pipe to go up pressure-bearing cylinder and outlet valve even pipe upper end, it is connected with pressure-bearing cylinder. The method has the advantages that the sealing performance of the high-voltage electrode sleeve can be rapidly and accurately detected, and the success rate and the operation reliability of the high-voltage electrode installation of the auxiliary steam boiler are improved.
Description
Technical Field
The utility model belongs to detection device, concretely relates to supplementary steam boiler high voltage electrode sleeve pipe leakproofness detection device.
Background
When a nuclear power plant unit is started, the unit is generally preheated by high-pressure steam generated by electrically heating a high-pressure electrode of an auxiliary steam boiler. After the auxiliary steam boiler is started for many times, the sealing gasket of the high-pressure electrode assembly is fragile and deteriorated and needs to be replaced regularly. Because the operation space is limited and the weight of the electrode assembly is heavy, the high-pressure electrode of the steam boiler is difficult to overhaul and install. Once the steam boiler high-pressure electrode assembly is repaired, steam leakage occurs when the steam boiler high-pressure electrode assembly is started and boosted to rated pressure, the high-pressure electrode is possibly short-circuited or even damaged by discharge, and then rework is performed, so that the repair period and equipment operation risk are increased, and manpower and material resources are wasted. Therefore, a device capable of rapidly and accurately detecting the sealing performance of the high-voltage electrode sleeve is needed. The electrode sleeve is subjected to a sealing performance test under the operating pressure working condition before being reinstalled, so that the defect of electrode air leakage caused by unqualified sealing performance of the sleeve after the high-voltage electrode sleeve is replaced is avoided, and the success rate of high-voltage electrode maintenance of an auxiliary steam boiler is improved.
When a nuclear power plant unit is started, the unit is generally preheated by high-pressure steam generated by electrically heating a high-pressure electrode of an auxiliary steam boiler. The electrode sleeve inside the boiler is a pressure-bearing boundary between the inside of the steam boiler and the outside atmosphere, and is also an insulator between the high-voltage electrode and the boiler shell. In actual operation, the internal electrode sleeve of the high-pressure boiler not only bears high temperature and high pressure generated by steam in the steam boiler, but also bears the pressure generated by bolts and disc springs of the electrode conducting rod in the vertical direction and the tangential stress generated by the lower polar plate due to water flow impact, the operation condition is complex and severe, and therefore, in the boiler electrode overhauling and mounting stage, the selection of the high-quality electrode sleeve is very important. In order to detect the sealing performance of a high-voltage electrode sleeve of a steam boiler and avoid sealing boundary failure caused by quality problems of invisible cracks, sand holes and the like existing in the electrode sleeve after the boiler is put into operation, and further cause grounding short circuit and malignant discharge accidents of an electrode due to insulation reduction, a device capable of quickly and accurately detecting the sealing performance of the electrode sleeve before the electrode sleeve is installed is needed in actual maintenance work.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an auxiliary steam boiler high voltage electrode sleeve pipe leakproofness detection device, it can avoid because of there are stealthy crackle, defects such as sand hole in the electrode sleeve pipe to lead to appearing leaking gas and reworking problem behind the electrode mounting, improves auxiliary steam boiler electrode mounting success rate.
The technical scheme of the utility model as follows: the device for detecting the sealing performance of the high-voltage electrode sleeve of the auxiliary steam boiler comprises an upper pressure bearing cylinder and a lower pressure bearing cylinder, wherein the upper pressure bearing cylinder is fixedly connected with the lower pressure bearing cylinder through a bolt, an electrode sleeve is installed on the lower portion of the lower pressure bearing cylinder, the lower end of the electrode sleeve is connected with an electrode base, a conducting rod is arranged in a cavity among the upper pressure bearing cylinder, the lower pressure bearing cylinder and the electrode sleeve, the bottom of the conducting rod is connected with the electrode base through a thread, a disc spring is sleeved at the thread at the top of the conducting rod, a bolt of the conducting rod is installed above the disc spring, the conducting rod bolt and the disc spring are both positioned in the cavity of the upper pressure bearing cylinder, the top of the upper pressure bearing cylinder is connected with a water outlet connecting pipe, the upper end of the water outlet connecting pipe is connected with a water outlet connector, the upper end of the water outlet valve is also connected with a three, the upper end of the tee joint upper connecting pipe is connected with a water inlet valve, and the upper end of the water inlet valve is connected with a water inlet connector.
The upper pressure-bearing cylinder is fixedly connected with the lower pressure-bearing cylinder through a bolt.
And a pressure-bearing cylinder sealing gasket is arranged between the upper pressure-bearing cylinder and the lower pressure-bearing cylinder.
And a sealing gasket at the upper end of the electrode sleeve is arranged between the lower pressure bearing cylinder and the electrode sleeve.
And a sealing gasket at the lower end of the electrode sleeve is arranged between the electrode sleeve and the electrode base.
The upper end of the tee joint upper connecting pipe is connected with a water inlet valve.
The upper end of the water inlet valve is connected with a water inlet joint.
The lower end of the three-way joint is connected with a three-way lower connecting pipe.
The three-way joint is transversely connected with a pressure gauge.
The upper end of the three-way joint is connected with a three-way upper connecting pipe.
The beneficial effects of the utility model reside in that, the device can detect out auxiliary steam boiler high voltage electrode sheathed tube sealing performance fast accurately, and obtains using many times in two factories of Qin auxiliary steam boiler high voltage electrode subassembly maintenance work, and the application is respond well. The electrode sleeve with qualified sealing performance detection has no problems of boiler steam leakage, short circuit discharge and sudden shutdown caused by unqualified sealing performance of the electrode sleeve body after the boiler is put into operation, and the success rate and the operation reliability of the high-voltage electrode installation of the auxiliary steam boiler are improved.
Drawings
Fig. 1 is a schematic view of the device for detecting the sealing performance of the high-voltage electrode sleeve of the auxiliary steam boiler provided by the utility model.
In the figure, 1 water inlet valve, 2 pressure gauge, 3 upper pressure bearing cylinder, 4 lower pressure bearing cylinder, 5 electrode sleeve upper end sealing gasket, 6 electrode sleeve lower end sealing gasket, 7 electrode base, 8 electrode sleeve, 9 conducting rod, 10 pressure bearing cylinder sealing gasket, 11 disc spring, 12 conducting rod bolt, 13 water outlet valve, 14 water outlet connecting pipe, 15 water outlet joint, 16 water inlet joint, 17 three-way upper connecting pipe, 18 three-way joint and 19 three-way lower connecting pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a study high tension electrode sleeve pipe structural feature to and the summary of on-the-spot maintenance experience, provide one set of electrode sleeve pipe leakproofness detection device, the device innovation point and the technical field who is suitable for as follows:
1. according to the actual situation, the tool of the utility model can meet the requirement of the sealing performance detection of the high-voltage electrode sleeve of the same type of auxiliary steam boiler;
2. through testing, the device can quantitatively measure the leakage amount of the electrode sleeve under different pressures, and accurately detect the sealing performance of the high-voltage electrode sleeve;
3. the whole set of tool is ingenious in design, simple in structure and convenient to use, and solves the problem of very important quality control on site.
As shown in fig. 1, the utility model discloses an auxiliary steam boiler high voltage electrode sleeve pipe leakproofness detection device includes water intaking valve 1, manometer 2, go up pressure-bearing section of thick bamboo 3, pressure-bearing section of thick bamboo 4 down, the sealed pad 5 of electrode sleeve pipe upper end, the sealed pad 6 of electrode sleeve pipe lower extreme, electrode base 7, electrode sleeve pipe 8, conducting rod 9, the sealed pad 10 of pressure-bearing section of thick bamboo, dish spring 11, conducting rod bolt 12, outlet valve 13, go out water union coupling 14, water connectors 15, water connectors 16, tee bend upper union coupling 17, three way connection 18, tee bend lower union coupling 19.
Wherein, the upper pressure-bearing cylinder 3 is fixedly connected with the lower pressure-bearing cylinder 4 through bolts, a pressure-bearing cylinder sealing gasket 10 is arranged between the upper pressure-bearing cylinder 3 and the lower pressure-bearing cylinder 4, the lower part of the lower pressure-bearing cylinder 4 is connected with an electrode sleeve 8, an electrode sleeve upper end sealing gasket 5 is arranged between the lower pressure-bearing cylinder 4 and the electrode sleeve 8, the lower end of the electrode sleeve 8 is connected with an electrode base 7, an electrode sleeve lower end sealing gasket 6 is arranged between the electrode sleeve 8 and the electrode base 7, a conductive rod 9 is arranged in a cavity among the upper pressure-bearing cylinder 3, the lower pressure-bearing cylinder 4 and the electrode sleeve 8, the bottom of the conductive rod 9 is in threaded connection with the electrode base 7, a disc spring 11 is arranged at the top of the conductive rod 9, a conductive rod bolt 12 is arranged above the disc spring 11 and screwed at the thread at the upper end of the conductive rod 9, the conductive rod bolt 12 and the disc spring 11 are both positioned in the cavity of the, the upper end of the water outlet connecting pipe 14 is connected with a water outlet valve 13, the upper end of the water outlet valve 13 is connected with a water outlet connector 15, the upper end of the upper pressure-bearing cylinder 3 is also connected with a tee joint lower connecting pipe 19, the tee joint lower connecting pipe 19 is connected with a tee joint 18, the tee joint 18 is transversely connected with a pressure gauge 2, the upper end of the tee joint 18 is connected with a tee joint upper connecting pipe 17, the upper end of the tee joint upper connecting pipe 17 is connected with a water inlet valve 1, and the upper end of the water inlet valve 1 is connected.
The utility model discloses a use as follows:
when the tightness of the electrode sleeve is detected, the electrode sleeve to be detected and the detection device are assembled as shown in fig. 1. The upper end surface and the lower end surface of the electrode sleeve, and the upper pressure-bearing cylinder and the lower pressure-bearing cylinder are sealed by matched sealing gaskets; the conducting rod is fastened to the gap of the disc spring through a bolt, and the gap level of the disc spring under the operation condition of the equipment is obtained; the upper pressure-bearing cylinder and the lower pressure-bearing cylinder are fastened through bolts according to standard torque; during detection, the range of the pressure gauge is matched with the testing pressure of the electrode sleeve to be detected.
Before the detection of the sealing performance of the electrode sleeve begins, the device is vertically placed, a water inlet valve and a water outlet valve are completely opened, a water inlet connector is connected with a booster pump to inject water and exhaust gas into the detection device, when water overflows from the water outlet valve, the water outlet valve is closed, water is continuously injected into the detection device through the water inlet connector and pressurized through the booster pump, a pressure gauge is observed, and when the pressure gauge is pressurized to a rated pressure, pressurization is stopped and the water inlet valve is closed. And (4) carrying out tightness inspection on the electrode sleeve, and observing whether the water seepage trace exists on the electrode sleeve body and the sealing end face or not, and whether the reading of a pressure gauge pointer is reduced or not. And if the leakage of the electrode sleeve body is observed, the electrode sleeve is unqualified.
And if the electrode sleeve has no leakage, opening the water inlet valve to continuously increase the pressure to the test pressure (higher than the rated pressure) required by the hydrostatic test, and performing the pressure maintaining test. After the pressure maintaining test is qualified, the water outlet valve is slowly opened to reduce the pressure to normal pressure, and residual water in the detection device is drained.
The utility model discloses an assembly process as follows:
and screwing and assembling the electrode base and the conducting rod, and vertically placing the electrode base and the conducting rod. And a matched sealing gasket is arranged on the electrode base. And (3) enabling the electrode sleeve to be detected to penetrate through the conducting rod and be stably placed on the sealing pad of the electrode base. And a matched sealing gasket is arranged on the upper end surface of the electrode sleeve to be detected. And the lower pressure-bearing cylinder penetrates through the conducting rod and is placed on the sealing pad on the upper end surface of the electrode sleeve. And a disc spring is placed at the upper end thread of the conducting rod and is fastened through a bolt, so that the coaxiality of each sealing gasket, each electrode sleeve and each pressure-bearing cylinder is observed and ensured to be good. And a matched sealing gasket is arranged on the upper end surface of the lower pressure-bearing cylinder. And installing the upper pressure-bearing cylinder, and fastening and connecting the upper pressure-bearing cylinder and the lower pressure-bearing cylinder by using bolts. The water inlet joint is connected with the booster pump, and the water inlet valve and the water outlet valve are opened. And when the water outlet joint of the detection device overflows with water, closing the water outlet valve. And pressurizing the detection device to perform a hydraulic test, and checking the sealing property of the electrode sleeve. Whether the tightness of the electrode sleeve is qualified or not can be judged by observing the reading change of the pressure gauge.
Claims (4)
1. Supplementary steam boiler high-voltage electrode sleeve pipe leakproofness detection device which characterized in that: the electrode comprises an upper pressure bearing cylinder and a lower pressure bearing cylinder, wherein the upper pressure bearing cylinder is fixedly connected with the lower pressure bearing cylinder through a bolt, an electrode sleeve is arranged at the lower part of the lower pressure bearing cylinder, the lower end of the electrode sleeve is connected with an electrode base, a conducting rod is arranged in a cavity among the upper pressure bearing cylinder, the lower pressure bearing cylinder and the electrode sleeve, the bottom of the conducting rod is connected with the electrode base through a thread, a disc spring is sleeved at the thread at the top of the conducting rod, the conducting rod is arranged above the disc spring through a bolt, the conducting rod bolt and the disc spring are both positioned in the cavity of the upper pressure bearing cylinder, the top of the upper pressure bearing cylinder is connected with a water outlet connecting pipe, the upper end of the water outlet connecting pipe is connected with a water outlet connector, the upper end of the upper pressure bearing cylinder is also connected with a three-way lower connecting pipe, the three-way connector is transversely connected with a pressure gauge, the lower end of the three-way, the upper end of the water inlet valve is connected with a water inlet joint.
2. The apparatus for testing the sealing performance of the high-voltage electrode bushing of an auxiliary steam boiler as claimed in claim 1, wherein: and a pressure-bearing cylinder sealing gasket is arranged between the upper pressure-bearing cylinder and the lower pressure-bearing cylinder.
3. The apparatus for testing the sealing performance of the high-voltage electrode bushing of an auxiliary steam boiler as claimed in claim 1, wherein: and a sealing gasket at the upper end of the electrode sleeve is arranged between the lower pressure bearing cylinder and the electrode sleeve.
4. The apparatus for testing the sealing performance of the high-voltage electrode bushing of an auxiliary steam boiler as claimed in claim 1, wherein: and a sealing gasket at the lower end of the electrode sleeve is arranged between the electrode sleeve and the electrode base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021912720.2U CN213516203U (en) | 2020-09-04 | 2020-09-04 | Device for detecting sealing performance of high-voltage electrode sleeve of auxiliary steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021912720.2U CN213516203U (en) | 2020-09-04 | 2020-09-04 | Device for detecting sealing performance of high-voltage electrode sleeve of auxiliary steam boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213516203U true CN213516203U (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021912720.2U Active CN213516203U (en) | 2020-09-04 | 2020-09-04 | Device for detecting sealing performance of high-voltage electrode sleeve of auxiliary steam boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213516203U (en) |
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2020
- 2020-09-04 CN CN202021912720.2U patent/CN213516203U/en active Active
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