Underline pressing detection device for emergency sealing mechanism of submerged pump

Abstract

The utility model discloses an offline pressurizing detection device for an emergency sealing mechanism of a submerged pump, which relates to the technical field of sealing detection of submerged pumps and comprises a pressurizing cylinder, a simulation shaft and a nitrogen storage cabinet. A connecting cover is fixedly arranged at the top opening of the pressing cylinder in a covering manner; the edge of the emergency sealing mechanism is fixedly connected with the connecting cover through a bolt; a gas outlet of the nitrogen storage cabinet is communicated with one side of the pressurizing cylinder through a gas inlet pipe, the other side of the pressurizing cylinder is communicated with an exhaust pipe, a gas inlet valve is installed on the gas inlet pipe, and an exhaust valve is installed on the exhaust pipe. The device has the advantages that the nitrogen storage cabinet feeds nitrogen into the pressurizing barrel, when the pressure is observed to be increased to a certain value through the pressure gauge, pressure maintaining is conducted, soapy water is sprayed to the emergency sealing mechanism, and the sealing performance of the emergency sealing mechanism is judged by observing whether bubbles are generated or not and the numerical value of the pressure gauge; according to the utility model, online simulation detection of the sealing performance of the emergency sealing mechanism of the submerged pump is realized, and the sealing performance and the pressure maintaining performance of the emergency sealing mechanism are determined.

Description

Technical field:

[0001] The utility model relates to the technical field of submersible pump sealing detection, in particular to an offline pressure detection device for an emergency sealing mechanism of a submersible pump. Background technology:

[0002] The produced liquid chlorine is first stored in a metering tank and then transported by a submersible pump through a delivery pipeline for external sale. The sealing performance of the emergency sealing mechanism of the submersible pump is crucial to the reliability of the overall operation and the safety of avoiding chlorine leakage after the liquid chlorine is gasified. In particular, the sealing performance of the submersible pump must be ensured before assembly after it is disassembled and overhauled. The submersible pump model currently used on site is L4-1218, and the function of its emergency sealing mechanism is: in the event of an emergency, the emergency sealing air inlet pipe fills the sealing airbag in the emergency sealing mechanism with gas to expand the sealing airbag and hold the drive shaft tightly to prevent medium leakage.

[0003] In the actual production process, maintenance personnel dismantle the submersible pump for maintenance and then install it directly on the equipment. When it is found that the emergency sealing mechanism still has sealing problems, it has to be dismantled for further maintenance, which is time-consuming, labor-intensive, and costly, and there are also serious safety issues. Utility model content:

[0004] The utility model aims to provide an offline pressure testing device for an emergency sealing mechanism of a submersible pump, which realizes offline pressure testing and pressure maintenance to ensure the sealing performance of the submersible pump when it is running online, so as to solve the problem of high labor intensity caused by repeated disassembly and the safety problem of leakage.

[0005] The utility model is implemented by the following technical scheme: an offline pressure detection device for an emergency sealing mechanism of a submersible pump, which comprises a pressure cylinder, a simulation shaft and a nitrogen storage cabinet; a connecting cover is fixedly provided at the top opening of the pressure cylinder, a through hole coaxially arranged with the pressure cylinder is opened on the connecting cover, an emergency sealing mechanism is slidably penetrated and installed in the through hole, and the edge of the emergency sealing mechanism is fixedly connected to the connecting cover by bolts; the simulation shaft is coaxially penetrated through the middle hole of the emergency sealing mechanism, the bottom end of the simulation shaft is placed in the pressure cylinder, a fastening nut is screwed on the top end of the simulation shaft, and the fastening nut abuts against the top end of the emergency sealing mechanism; the air outlet of the nitrogen storage cabinet is connected with one side of the pressure cylinder through an air inlet pipe, and the other side of the pressure cylinder is connected with an exhaust pipe, an air inlet valve is installed on the air inlet pipe, and an exhaust valve is installed on the exhaust pipe.

[0006] Furthermore, a pressure gauge is installed on the exhaust pipe.

[0007] Furthermore, a sealing gasket is provided between the emergency sealing mechanism and the connection cover.

[0008] Furthermore, it also includes a detection water tank and a nozzle placed directly above the emergency sealing mechanism, the water outlet of the detection water tank is connected to the inlet of the water pump, the outlet of the water pump is connected to one end of the detection pipe, the other end of the detection pipe is connected to the water inlet end of the nozzle, and a control water valve is installed on the detection pipe.

[0009] The utility model has the following advantages: nitrogen is fed into the pressure cylinder from the nitrogen storage cabinet, and when the pressure rises to a certain value as observed by the pressure gauge, the air inlet valve is closed to maintain the pressure, soapy water is sprayed on the emergency sealing mechanism, and the sealing performance of the emergency sealing mechanism is judged by observing whether bubbles are generated and the value of the pressure gauge; the utility model realizes offline simulation detection of the sealing performance of the emergency sealing mechanism of the submersible pump, determines its sealing performance and pressure-maintaining performance, and prevents leakage problems when the submersible pump is operating normally online, thereby preventing serious safety accidents caused by such problems. Description of the drawings:

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Figure 2 for Figure 1 A partial enlarged view of .

[0012] The components in the accompanying drawings are marked as follows: pressure cylinder 1, simulation shaft 2, nitrogen storage cabinet 3, connecting cover 4, through hole 5, emergency sealing mechanism 6, fastening nut 7, air inlet pipe 8, exhaust pipe 9, air inlet valve 10, exhaust valve 11, pressure gauge 12, sealing gasket 13, test water tank 14, nozzle 15, water pump 16, test pipeline 17, control water valve 18, sealing air bag 19. Specific implementation method:

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0015] like Figure 1 and Figure 2 As shown, the present embodiment provides an offline pressure testing device for an emergency sealing mechanism of a submersible pump, which comprises a pressure cylinder 1, a simulation shaft 2 and a nitrogen storage cabinet 3; a connecting cover 4 is fixedly provided on the top opening of the pressure cylinder 1, and the edge of the barrel mouth of the pressure cylinder 1 and the bottom surface of the connecting cover 4 are fully welded to ensure the sealing during detection; a through hole 5 coaxially arranged with the pressure cylinder 1 is opened on the connecting cover 4, and an emergency sealing mechanism 6 is slidably installed in the through hole 5, and a sealing gasket 13 is padded between the edge of the emergency sealing mechanism 6 and the connecting cover 4, and is fixedly connected to the connecting cover 4 by bolts, and an effective sealing effect is played by the sealing gasket 13, thereby ensuring the efficiency of subsequent detection of the sealing performance of the emergency sealing mechanism 6; in this way, the emergency sealing mechanism 6 is installed on the utility model to facilitate the next step of pressure testing.

[0016] The middle hole of the emergency sealing mechanism 6 is coaxially penetrated with a simulation shaft 2, which is equivalent to the transmission shaft in the submersible pump that cooperates with the emergency sealing mechanism 6. The bottom end of the simulation shaft 2 is placed in the pressure cylinder 1, and the top of the simulation shaft 2 is screwed with a fastening nut 7, which abuts against the top of the emergency sealing mechanism 6, thereby pressing the emergency sealing mechanism 6 firmly on the connecting cover 4; the air outlet of the nitrogen storage cabinet 3 is connected to one side of the pressure cylinder 1 through the air inlet pipe 8, and the other side of the pressure cylinder 1 is connected to the exhaust pipe 9, and the air inlet pipe 8 is installed with The air inlet valve 10 and the exhaust pipe 9 are provided with an exhaust valve 11, and the exhaust pipe 9 is provided with a pressure gauge 12. During the inspection, the sealing airbag 19 in the emergency sealing mechanism 6 is first filled with gas from the emergency sealing air inlet pipe 8 to expand the sealing airbag 19 and hold the simulated shaft 2 tightly. The air inlet valve 10 is opened, and nitrogen is sent into the pressure cylinder 1 from the nitrogen storage cabinet 3. When the pressure rises to a certain value through the pressure gauge 12, the air inlet valve 10 is closed to maintain the pressure, and then the sealing performance of the emergency sealing mechanism 6 is judged by observing the pressure gauge 12.

[0017] It also includes a detection water tank 14 and a nozzle 15 placed just above the emergency sealing mechanism 6. The water outlet of the detection water tank 14 is connected to the inlet of the water pump 16. The outlet of the water pump 16 is connected to one end of the detection pipe 17. The other end of the detection pipe 17 is connected to the water inlet end of the nozzle 15. A control water valve 18 is installed on the detection pipe 17. After nitrogen is injected into the pressure cylinder 1, the control water valve 18 is opened, the water pump 16 is started, and soapy water is drawn from the detection water tank 14. After passing through the detection pipe 17, it is sprayed from the nozzle 15 to the emergency sealing mechanism 6. When there is a sealing problem, it is sprayed on the emergency sealing mechanism 6. The soapy water on the emergency sealing mechanism 6 will produce bubbles, which is more conducive to the judgment of the operating personnel; therefore, through the utility model, the sealing performance of the emergency sealing mechanism 6 of the submersible pump can be tested offline by pressurizing and maintaining pressure for a long time, and the problems in the inspection and maintenance process can be accurately found during the pressurization and pressure maintaining process, so as to facilitate timely correction of existing sealing problems, thereby saving the cost of inspection and maintenance and saving inspection and maintenance time. Secondly, it can ensure the inspection and maintenance quality of the equipment during normal operation online, and will not cause safety accidents due to sealing failures.

[0018] Working process: first, fill the sealing airbag 19 in the emergency sealing mechanism 6 with gas from the emergency sealing air inlet pipe 8 to expand the sealing airbag 19 and hold the simulated shaft 2 tightly, open the air inlet valve 10, and send nitrogen into the pressure cylinder 1 from the nitrogen storage cabinet 3, and observe through the pressure gauge 12 that the pressure rises to 0.7 MPa, then close the air inlet valve 10 to stop sending nitrogen and maintain the pressure, then observe the pressure gauge 12 while opening the control water valve 18, start the water pump 16, draw soapy water from the detection water tank 14, and spray it from the nozzle 15 to the emergency sealing mechanism 6 after passing through the detection pipeline 17, check whether there are bubbles at the gap where the simulated shaft 2 is installed and the sealing gasket 13, if there are bubbles, it means that the air tightness is not good, and it is necessary to open the exhaust valve 11 to discharge the nitrogen in the pressure cylinder 1 from the exhaust pipe 9 to achieve pressure relief, and then disassemble the emergency sealing mechanism 6 for re-inspection, assembly and installation on the utility model, and continue to inject nitrogen into the pressure cylinder 1 according to the above process to detect the sealing.

[0019] When no bubbles are generated and the pressure is maintained for 30 minutes, the value of the pressure gauge 12 remains at 0.7 MPa, indicating that the emergency sealing mechanism 6 has reliable sealing performance and can be installed on the submersible pump for actual production, thereby avoiding repeated disassembly and assembly of the submersible pump by the staff and reducing labor intensity and safety hazards.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Offline pressure testing device for emergency sealing mechanism of submersible pump, characterized in that: It includes a pressure cylinder, a simulated shaft and a nitrogen storage cabinet; A connection cover is fixedly provided at the top opening of the pressing cylinder, and a through hole coaxially arranged with the pressing cylinder is opened on the connection cover, an emergency sealing mechanism is slidably installed in the through hole, and the edge of the emergency sealing mechanism is fixedly connected to the connection cover by bolts; The simulation shaft is coaxially passed through the middle hole of the emergency sealing mechanism, the bottom end of the simulation shaft is placed in the pressure cylinder, the top end of the simulation shaft is threaded with a fastening nut, and the fastening nut abuts against the top end of the emergency sealing mechanism; The gas outlet of the nitrogen storage cabinet is connected to one side of the pressure cylinder through an air inlet pipe, and the other side of the pressure cylinder is connected to an exhaust pipe. An air inlet valve is installed on the air inlet pipe, and an exhaust valve is installed on the exhaust pipe.

2. The offline pressure detection device for emergency sealing mechanism of a submersible pump according to claim 1, characterized in that: A pressure gauge is installed on the exhaust pipe.

3. The offline pressure detection device for emergency sealing mechanism of a submersible pump according to claim 1, characterized in that: A sealing gasket is provided between the emergency sealing mechanism and the connecting cover.

4. The offline pressure detection device for emergency sealing mechanism of a submersible pump according to any one of claims 1 to 3, characterized in that: It also includes a detection water tank and a nozzle placed directly above the emergency sealing mechanism, the water outlet of the detection water tank is connected to the inlet of the water pump, the outlet of the water pump is connected to one end of the detection pipeline, the other end of the detection pipeline is connected to the water inlet end of the nozzle, and a control water valve is installed on the detection pipeline.

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