Self-checking multistage centrifugal pump

Abstract

A self-checking multi-stage centrifugal pump comprises a bearing seat, an impeller, a pump shaft, a liquid guide device, a pressure sensor, a vibration sensor, a leakage sensor, a temperature sensor, a data processing device and a notification device. A pressure sensor mounting hole is provided on the liquid guide device at a middle position. The pressure sensor passes through the pressure sensor mounting hole of the liquid guide device and is fixedly connected to the liquid guide device. The data processing device, the vibration sensor, the leakage sensor and the temperature sensor are mounted on the bearing seat. The signals generated by the sensors of the data processing device generate corresponding pressure information, vibration information, leakage information and temperature information, and the notification device is used to report the above information to the staff, so that the staff can timely understand the operating status of the self-checking multi-stage centrifugal pump, and take preventive measures according to the operating status, thereby eliminating the safety hazards of the coal mine.

Description

Technical Field

[0001] The invention relates to a multistage centrifugal pump, in particular to a self-checking multistage centrifugal pump. Background Art

[0002] Multistage centrifugal pumps are mainly used for lifting water levels with large lifts in deep coal mines. Due to the complexity of the pumping media, such as granular media, sludge viscous media, acidic and alkaline media, etc., the components of the multistage centrifugal pumps are easily damaged. In addition, the use environment of multistage centrifugal pumps is mostly in the limited space of deep mines and low-lying areas below the ground level, which is not convenient for staff to conduct random inspections in a timely manner, resulting in the multistage centrifugal pumps being out of control, burying hidden dangers to coal mine safety and threatening stable production operations. Summary of the invention

[0003] In view of this, it is necessary to provide a self-checking multi-stage centrifugal pump that can report its own operating status.

[0004] A self-checking multi-stage centrifugal pump comprises a bearing seat, an impeller, a pump shaft, a liquid flow guide device, a pressure sensor, a vibration sensor, a leakage sensor, a temperature sensor, a data processing device and a notification device. The bearing seat carries the pump shaft, the impeller is mounted on the pump shaft, the outer side of the impeller is the liquid flow guide device, a pressure sensor mounting hole is provided on the liquid flow guide device, the pressure sensor passes through the pressure sensor mounting hole of the liquid flow guide device and is fixedly connected to the liquid flow guide device, a sensing end of the pressure sensor points to the pump shaft, a wiring end of the pressure sensor is electrically connected to the data processing device, the data processing device, the vibration sensor, the leakage sensor and the temperature sensor are mounted on the bearing seat, the data processing device collects pressure signals, vibration signals, leakage signals and temperature signals generated by the pressure sensor, the vibration sensor, the leakage sensor and the temperature sensor, and generates corresponding pressure information, vibration information, leakage information and temperature information, the data processing device provides the pressure information, vibration information, leakage information and temperature information to the notification device, and the notification device reports the pressure information, vibration information, leakage information and temperature information.

[0005] In the above-mentioned self-checking multi-stage centrifugal pump, a pressure sensor mounting hole is opened on the liquid flow guide device at the middle position, the pressure sensor passes through the pressure sensor mounting hole of the liquid flow guide device and is fixedly connected to the liquid flow guide device, the sensing end of the pressure sensor points to the pump shaft, the wiring end of the pressure sensor is electrically connected to the data processing device, the data processing device, the vibration sensor, the drip sensor, and the temperature sensor are installed on the bearing seat, the data processing device collects the pressure signal, vibration signal, drip signal and temperature signal generated by the pressure sensor, the vibration sensor, the drip sensor, and the temperature sensor, and generates corresponding pressure information, vibration information, drip information and temperature information, the data processing device provides the pressure information, vibration information, drip information and temperature information to the notification device, and the notification device reports the pressure information, vibration information, drip information and temperature information to the staff, so that the staff can timely understand the operating status of the self-checking multi-stage centrifugal pump, and take preventive measures according to the operating status, thereby eliminating safety hazards in coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 The figure is a schematic structural diagram of a self-checking multi-stage centrifugal pump according to a preferred embodiment.

[0007] Figure 2 for Figure 1 Schematic diagram of the installation and coordination structure of the liquid guide device and temperature sensor.

[0008] Figure 3 This is a schematic diagram of another installation and matching structure of the liquid guide device and the temperature sensor.

[0009] In the figure: a self-checking multi-stage centrifugal pump 10, a water inlet 100, a water outlet 101, a bearing seat 11, an impeller 12, a pump shaft 13, a liquid guide device 14, a pressure sensor mounting hole 140, a guide vane 141, a middle section 142, a pressure sensor 16, a vibration sensor 17, a drip sensor 18, a temperature sensor 19, a data processing device 20, a notification device 21, a filtering device 30, a drain port 31, a filter box 32, a flood and turbid liquid collection chamber 320, a filtered liquid collection chamber 321, a backflush device 33, a filter baffle 34, a liquid guide device 44, a pressure sensor mounting hole 440, and a pressure sensor 46. DETAILED DESCRIPTION

[0010] Please see Figure 1 and Figure 2The self-checking multistage centrifugal pump 10 includes a bearing seat 11, an impeller 12, a pump shaft 13, a liquid guide device 14, a pressure sensor 16, a vibration sensor 17, a drip sensor 18, a temperature sensor 19, a data processing device 20 and a notification device 21. The bearing seat 11 carries the pump shaft 13, the impeller 12 is installed on the pump shaft 13, the outer side of the impeller 12 is the liquid guide device 14, the liquid guide device 14 at the middle position is provided with a pressure sensor installation hole 140, the pressure sensor 16 passes through the liquid guide device 14 The pressure sensor mounting hole 140 is fixedly connected to the liquid guide device 14, the sensing end of the pressure sensor 16 points to the pump shaft 13, the wiring end of the pressure sensor 16 is electrically connected to the data processing device 20, the data processing device 20, the vibration sensor 17, the drip sensor 18, and the temperature sensor 19 are installed on the bearing seat 11, for example, by installing a bearing seat on the bearing seat 11, and using the bearing seat to fix the data processing device 20, the vibration sensor 17, the drip sensor 18, and the temperature sensor 19. The data processing device 20 collects the pressure signal, vibration signal, drip signal, and temperature signal generated by the pressure sensor 16, the vibration sensor 17, the drip sensor 18, and the temperature sensor 19, and generates corresponding pressure information, vibration information, drip information, and temperature information. The data processing device 20 provides the pressure information, vibration information, drip information, and temperature information to the notification device 21, and the notification device 21 reports the pressure information, vibration information, drip information, and temperature information.

[0011] In this embodiment, the notification device 21 is a display device, which is connected to the data processing device 20 via a data line. The notification device 21 is set in an easily observable place, and the notification device 21 displays the received pressure information, vibration information, drip information and temperature information for the staff to watch. In other embodiments, the notification device is a voice playback device, which is connected to the data processing device via a data line, and the notification device converts the received pressure information, vibration information, drip information and temperature information into voice for the staff to listen to. The data processing device has a communication function, and sends the above information to the remote control center, which compares and analyzes the above information, obtains the corresponding alarm information, and provides the alarm information to the corresponding staff for timely processing. Of course, the above comparison and analysis function can also be completed by the data processing device 20.

[0012] The liquid flow guiding device 14 includes a guide vane 141 and a middle section 142. The guide vane 141 and the middle section 142 are installed on the pump shaft 13. There is a gap between the guide vane 141 and the middle section 142 for liquid to pass through. The pressure sensor mounting hole 140 is provided on the middle section 142. The pressure sensor mounting hole 140 on the middle section 142 is truncated cone-shaped, and the inner wall of the pressure sensor mounting hole 140 is provided with an internal thread. The pressure sensor 16 includes a truncated cone-shaped sensing end and a cylindrical terminal. The outer wall of the truncated cone-shaped sensing end is provided with an external thread. The truncated cone-shaped sensing end is screwed into the pressure sensor mounting hole in a spiral manner. In this way, when the pressure sensor is damaged, the pressure sensor can be directly removed from the pressure sensor mounting hole on the liquid flow guiding device, and then a good pressure sensor can be selected from the truncated cone-shaped pressure sensor mounting hole for fixing, so as to achieve the purpose of conveniently replacing the pressure sensor.

[0013] In other embodiments, please also refer to Figure 3 The pressure sensor mounting hole 440 includes a first hole and a second hole, the first hole and the second hole are coaxial, and the aperture of the second hole is larger than the aperture of the first hole. The pressure sensor 46 includes a cylindrical sensing end and a cylindrical wiring terminal. The outer diameter of the cylindrical sensing end is adapted to the aperture of the second hole, and the outer diameter of the cylindrical wiring terminal is adapted to the aperture of the first hole, so that the cylindrical sensing end cannot enter the first hole. After the cylindrical wiring terminal passes through the first hole, it is connected to the data processing device through an electric wire. Furthermore, an internal thread is provided on the inner wall of the first hole, and an external thread is provided on the outer wall of the cylindrical wiring terminal. The internal thread and the external thread cooperate with each other to complete the fixation of the pressure sensor 46 and the liquid diversion device 44.

[0014] Furthermore, the self-checking multistage centrifugal pump 10 also includes a filtering device 30, a drain outlet 31 of the filtering device 30 is connected to the water inlet 100 of the self-checking multistage centrifugal pump 10 to transport the filtered liquid to the water inlet 100, and the filtering device 30 is also connected to the water outlet 101 of the self-checking multistage centrifugal pump 10. The filtering device 30 periodically introduces part of the water discharged from the water outlet 101 of the self-checking multistage centrifugal pump 10 for backblowing to disperse the filter residue. The filter device 30 includes a filter box 32 and a back-blowing device 33. A filter partition 34 is provided in the filter box 32 to divide the space in the filter box 32 into a turbid liquid collection chamber 320 and a filtered liquid collection chamber 321. The liquid inlet end 330 of the back-blowing device 33 is connected to the water outlet 101 of the self-checking multi-stage centrifugal pump 10. The liquid discharge end 331 of the back-blowing device 33 penetrates into the filtered liquid collection chamber 321 and is close to the filter partition 34 and the bottom of the filter box 32. The filtered liquid collection chamber 321 is also connected to the water inlet 100 of the self-checking multi-stage centrifugal pump 10 through a pipeline. The back-blowing device 33 is electrically connected to the data processing device 20, and the data processing device 20 controls the back-blowing device at a fixed time. 33 introduces part of the water discharged from the outlet 101 of the self-checking multi-stage centrifugal pump 10 into the filter box 32; in other embodiments, the data processing device compares the generated pressure information with the preset pressure reference information. When the pressure information is compared and does not correspond to the preset pressure reference information, the back-flushing device is controlled to introduce part of the water discharged from the outlet of the self-checking multi-stage centrifugal pump into the filter box for back-flushing, and then compares the current pressure information generated according to the real-time acquired pressure signal with the preset pressure reference information. When it is compared that the current pressure information does not correspond to the preset pressure reference information, a preset alarm message is generated, and the alarm message is reported by the notification device. In this way, it can be avoided that the filter box 32 is blocked by impurities and causes insufficient liquid supply, which causes the pressure in the self-checking multi-stage centrifugal pump 10 to change, causing the pressure signal to be unstable and eventually generating a false alarm.

[0015] In the above self-checking multi-stage centrifugal pump 10, a pressure sensor mounting hole 140 is provided in the liquid guide device 14 at the middle position, and the pressure sensor 16 passes through the pressure sensor mounting hole 140 of the liquid guide device 14 and is fixedly connected to the liquid guide device 14. The sensing end of the pressure sensor 16 points to the pump shaft 13, and the wiring end of the pressure sensor 16 is electrically connected to the data processing device 20. The data processing device 20, the vibration sensor 17, the drip sensor 18, and the temperature sensor 19 are installed on the bearing seat 11. The data processing device 20 collects the pressure sensor 16 and the vibration sensor 17. The drip sensor 18 and the temperature sensor 19 generate pressure signals, vibration signals, drip signals and temperature signals, and generate corresponding pressure information, vibration information, drip information and temperature information. The data processing device 20 provides the pressure information, vibration information, drip information and temperature information to the notification device 21, and the notification device 21 reports the pressure information, vibration information, drip information and temperature information to the staff, so that the staff can understand the operating status of the self-checking multi-stage centrifugal pump 10 in time, and take preventive measures according to the operating status, thereby eliminating safety hazards in coal mines.

Claims

1. A self-checking multistage centrifugal pump, comprising a bearing seat, an impeller, a pump shaft, and a liquid guide device, wherein the bearing seat carries the pump shaft, the impeller is mounted on the pump shaft, and the outer side of the impeller is the liquid guide device, characterized in that: It also includes a pressure sensor, a vibration sensor, a drip sensor, a temperature sensor, a data processing device and a notification device. The liquid diversion device is provided with a pressure sensor mounting hole. The pressure sensor passes through the pressure sensor mounting hole of the liquid diversion device and is fixedly connected to the liquid diversion device. The sensing end of the pressure sensor points to the pump shaft. The wiring end of the pressure sensor is electrically connected to the data processing device. The data processing device, the vibration sensor, the drip sensor and the temperature sensor are installed on the bearing seat. The data processing device collects the pressure signal, vibration signal, drip signal and temperature signal generated by the pressure sensor, the vibration sensor, the drip sensor and the temperature sensor, and generates corresponding pressure information, vibration information, drip information and temperature information. The data processing device provides the pressure information, vibration information, dripping information and temperature information to the notification device, and the notification device reports the pressure information, vibration information, dripping information and temperature information; the liquid guide device includes a guide vane and a middle section, the guide vane and the middle section are installed on the pump shaft, there is a gap between the guide vane and the middle section for liquid to pass through, and the middle section is provided with the pressure sensor installation hole; the pressure sensor installation hole on the middle section includes a first hole and a second hole, the first hole and the second hole are coaxial, and the aperture of the second hole is larger than the aperture of the first hole, the pressure sensor includes a cylindrical sensing end and a cylindrical wiring terminal, the outer diameter of the cylindrical sensing end is adapted to the aperture of the second hole, and the outer diameter of the cylindrical wiring terminal is adapted to the aperture of the first hole, so that The cylindrical sensing end cannot enter the first hole, and the cylindrical wiring terminal is connected to the data processing device through the wire after passing through the first hole; an internal thread is arranged on the inner wall of the first hole, and an external thread is arranged on the outer wall of the cylindrical wiring terminal, and the internal thread and the external thread cooperate with each other to complete the fixation of the pressure sensor and the liquid guide device; the pressure sensor mounting hole on the middle section is truncated cone-shaped, and the inner wall of the pressure sensor mounting hole is provided with an internal thread. The pressure sensor includes a truncated cone-shaped sensing end and a cylindrical wiring terminal, and the outer wall of the truncated cone-shaped sensing end is provided with an external thread. The truncated cone-shaped sensing end is screwed into the pressure sensor mounting hole in a spiral manner, and the cylindrical wiring terminal is connected to the data processing device through the wire; the self-checking multi-stage centrifugal pump also The invention comprises a filter device, wherein the drain port of the filter device is connected to the water inlet of the self-checking multistage centrifugal pump so as to convey the filtered liquid to the water inlet, and the filter device is also connected to the water outlet of the self-checking multistage centrifugal pump. The filter device periodically introduces part of the water discharged from the water outlet of the self-checking multistage centrifugal pump for back-blowing so as to blow away the filter residue; the filter device comprises a filter box and a back-blowing device, a filter baffle is arranged in the filter box so as to divide the space in the filter box into a turbid liquid collection chamber and a filtered liquid collection chamber, the liquid inlet end of the back-blowing device is connected to the water outlet of the self-checking multistage centrifugal pump, the liquid discharge end of the back-blowing device penetrates into the filtered liquid collection chamber and is close to the filter baffle and the bottom of the filter box, and the filtered liquid collection chamber is also connected to the water inlet of the self-checking multistage centrifugal pump through a pipeline;The backflush device is electrically connected to the data processing device. The data processing device compares the generated pressure information with the preset pressure reference information. When the pressure information is compared to the preset pressure reference information, the backflush device is controlled to backflush. Then, the current pressure information generated according to the real-time acquired pressure signal is compared with the preset pressure reference information. When the current pressure information is compared to the preset pressure reference information, the preset alarm information is generated and the alarm information is reported by the notification device. ; 2. The self-checking multistage centrifugal pump according to claim 1, characterized in that: The notification device is a display device, which is connected to the data processing device via a data line. The notification device displays the received pressure information, vibration information, dripping information and temperature information for viewing by the staff.

3. The self-checking multistage centrifugal pump according to claim 1, characterized in that: The notification device is a voice playing device, which is connected to the data processing device via a data line. The notification device converts the received pressure information, vibration information, dripping information and temperature information into voice for the staff to listen to.

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