Novel centrifugal pump liquid level monitoring and interlocking mechanism

Abstract

The invention relates to the field of centrifugal pumps, in particular to a novel centrifugal pump liquid level monitoring and interlocking mechanism which comprises a monitoring module, a water diversion module and a DCS module, no matter whether a water filling test is carried out before the centrifugal pump is used or in the process of using the centrifugal pump, the monitoring and interlocking mechanism is used, and in the using process, the liquid level of the centrifugal pump is monitored. The monitoring module can accurately monitor the water level in the centrifugal pump and transmits a signal to the DCS module, the DCS module transmits the signal to the water diversion module after receiving the signal, and the water diversion module determines whether to continue to inject water or stop injecting water after receiving the signal, so that the situation of excessive injected water is effectively reduced, the whole process is safe and stable, and the sales volume is high; according to the method, automation of preparation work before the centrifugal pump is started is achieved to a certain degree, and it is ensured that the centrifugal pump achieves the effect of accurate water filling amount.

Description

Technical Field

[0001] The present application relates to the field of centrifugal pumps, and in particular to a novel liquid level monitoring and interlocking mechanism for centrifugal pumps. Background Art

[0002] Centrifugal pumps are a common type of fluid conveying equipment, widely used in industries such as industry, agriculture, and municipal administration. Centrifugal pumps convert mechanical energy into kinetic energy of the fluid through a rotating impeller. Liquid enters the impeller from the water inlet of the pump, and the rotation of the impeller causes the liquid to obtain centrifugal force, pushing the liquid along the channel of the pump body to flow out to the water outlet. Centrifugal pumps have a simple structure, strong adaptability, and high efficiency, so they are particularly suitable for conveying various types of liquids at large flow rates and low pressures, including clean water, chemical liquids, etc.

[0003] During the use of centrifugal pumps, in order to ensure the normal use of centrifugal pumps, all-round monitoring is required, including: temperature monitoring, pressure monitoring, vibration monitoring, leakage monitoring and liquid level monitoring. Among them, regarding liquid level monitoring, the centrifugal pump needs to fill the water pump casing with water in advance before starting the water pump. This is a key step to ensure the normal operation of the water pump. This practice is especially important for multi-stage centrifugal pumps, because filling with water can prevent air from accumulating in the pump body, thereby ensuring that the water pump can effectively inhale and discharge water. The water pump relies on the centrifugal force generated by the rotation of the impeller to form a vacuum, thereby inhaling water. If there is air in the pump body, the center of the impeller cannot form a sufficient vacuum, resulting in the water pump being unable to effectively inhale water.

[0004] In the related art, at the centrifugal water pump working site (mostly in the mine), most of the current water filling devices are manual water filling devices, that is, the on-site workers manually pour a certain amount of water into the pump casing. In most cases, the amount of water poured is determined by the on-site workers based on experience. After pouring water for a certain period of time, the water filling is stopped and the water pump is started. However, the amount of water poured based on experience is not necessarily accurate. If the amount of water poured is small, the air in the pump casing is not completely exhausted, and starting the water pump will cause cavitation of the water pump, vibration, and efficiency reduction. If the amount of water poured is too much, a lot of time will be wasted. At present, most coal mines are actively transforming towards automation. Filling the pump casing with water is a preparatory link before the water pump is started. This link is currently difficult to automate. The key point is that it is impossible to determine whether the water level in the pump casing can reach the conditions for starting the pump. Therefore, a new type of centrifugal pump liquid level monitoring and interlocking mechanism is urgently needed to realize the automation of the preparatory work before the centrifugal pump starts and ensure that the centrifugal pump achieves the effect of accurate water filling. Summary of the invention

[0005] In order to automate the preparation work before starting a centrifugal pump and ensure that the centrifugal pump achieves an accurate water filling effect, the present application provides a novel liquid level monitoring and interlocking mechanism for a centrifugal pump.

[0006] The present application provides a novel centrifugal pump liquid level monitoring and interlocking mechanism adopts the following technical solution: A novel centrifugal pump liquid level monitoring and interlocking mechanism, comprising: A monitoring module is arranged on the centrifugal pump body; A water diversion module is detachably connected to the centrifugal pump body; and The DCS module is arranged outside the centrifugal pump body, and the monitoring module and the water diversion module are both electrically connected to the DCS module.

[0007] By adopting the above technical solution, the liquid level monitoring and interlocking mechanism of the present application is set as a combination of a monitoring module, a water diversion module and a DCS module, so that during the use of the centrifugal pump, the monitoring module monitors the water level in the centrifugal pump and transmits the signal to the DCS module. After receiving the water level signal, the DCS module transmits the signal to the water diversion module. After receiving the signal, the water diversion module effectively adjusts the water level in the centrifugal pump, so that the centrifugal pump is in the best working state. Compared with the related technology, the whole process is more efficient and more stable. The present application realizes the automation of the preparation work before starting the centrifugal pump and ensures that the centrifugal pump reaches the effect of accurate water filling to a certain extent.

[0008] Optionally, the monitoring module is a liquid level sensor, which includes a sensor body and a sensor probe. The sensor body is located on the centrifugal pump body, and the sensor probe passes through the centrifugal pump body and can contact the liquid in the centrifugal pump body.

[0009] By adopting the above technical solution, the use of a liquid level sensor can directly monitor the liquid level changes, provide accurate data, facilitate rapid response and adjustment, and improve the operating efficiency of the pump.

[0010] Optionally, the monitoring module is a differential pressure transmitter, which includes a transmitter body and a transmitter probe. The transmitter body is located on the centrifugal pump body. The transmitter probe includes a high-pressure probe and a low-pressure probe. The high-pressure probe is set at the high-pressure point of the centrifugal pump body, and the low-pressure probe is set at the low-pressure point of the centrifugal pump body.

[0011] By adopting the above technical solutions, the design of the differential pressure transmitter can monitor the liquid level at different pressure points, adapt to more complex working environments, and improve the accuracy and reliability of monitoring.

[0012] Optionally, the water diversion module includes a water diversion pump, and the water diversion pump adjusts the water level according to the signal transmitted to the DCS module by the liquid level sensor or the differential pressure transmitter.

[0013] By adopting the above technical solutions, the design of the water diversion module realizes automatic water level adjustment, ensures the safe operation of the pump, reduces manual intervention, and improves the intelligence level of the system.

[0014] Optionally, a transmission module is also provided on the centrifugal pump body, and the transmission module includes a blocking component and an alarm component.

[0015] By adopting the above technical solution, setting up a transmission module enhances the safety of the equipment, can handle abnormal situations in a timely manner, and reduce the risk of pump damage.

[0016] Optionally, the blocking assembly includes a blocking plate, a blocking bag and a connecting rod, wherein the blocking plate is slidably connected to the inner wall of the centrifugal pump body, one end of the connecting rod is vertically fixed to the blocking plate, and the other end is fixedly connected to the blocking bag.

[0017] By adopting the above technical solution, the design of the plugging component can effectively prevent liquid leakage, protect equipment and the environment, and improve the reliability of the overall system.

[0018] Optionally, a limit plate and a slide rail are further provided between the blocking plate and the inner side wall of the centrifugal pump body, the limit plate is used to limit the blocking assembly, and the blocking plate can slide on the slide rail.

[0019] By adopting the above technical solution, the design of the limit plate and the slide rail makes the movement of the blocking plate more stable, thereby improving the operational safety and reliability of the system.

[0020] Optionally, the blocking capsule is made of polymer waterproof material.

[0021] By adopting the above technical solution, the blocking capsule made of polymer waterproof material has good waterproof performance.

[0022] Optionally, the alarm component includes an alarm light, a first alarm block, and a second alarm block, the alarm light is arranged on the centrifugal pump body, the first alarm block is fixedly connected to the alarm light switch, the second alarm block is fixedly connected to one end of the blocking plate close to the alarm light, the first alarm block and the second alarm block are both magnetic blocks, and the first alarm block and the second alarm block can repel each other.

[0023] By adopting the above technical solution, the design of the alarm component can issue an alarm in time, ensuring that the operator can take prompt measures, thereby further enhancing the safety of the equipment.

[0024] Optionally, the alarm component further includes an alarm horn, and the alarm horn is arranged in series with the alarm light.

[0025] By adopting the above technical solution, the series design of the alarm horn provides a more intuitive alarm method, enhances the audibility of the alarm, and further improves the safety and operability of the equipment.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the liquid level monitoring and interlocking mechanism of the present application as a combination of a monitoring module, a water diversion module and a DCS module, during the use of the centrifugal pump, the monitoring module monitors the water level in the centrifugal pump and transmits the signal to the DCS module. After receiving the water level signal, the DCS module transmits the signal to the water diversion module. After receiving the signal, the water diversion module effectively adjusts the water level in the centrifugal pump, so that the centrifugal pump is in the best working state. Compared with the related technology, the whole process is more efficient and more stable. The present application realizes the automation of the preparation work before starting the centrifugal pump and ensures that the centrifugal pump reaches the effect of accurate water filling to a certain extent. 2. Setting the monitoring module as a liquid level sensor or a differential pressure transmitter provides multiple possibilities for the use of the centrifugal pump and improves the application range of the centrifugal pump; 3. The transmission module is configured as a combination of a blocking component and an alarm component, so that when there is too much liquid in the centrifugal pump, the water diversion module can be blocked in time, and an alarm can be sounded at the same time, so that the staff can take control in time to ensure the safety and stability of the centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram (cross section) of the overall structure of a novel centrifugal pump liquid level monitoring and interlocking mechanism applied to a centrifugal pump body according to an embodiment of the present application.

[0028] Figure 2 yes Figure 1 Magnified view of area A.

[0029] Figure 3 This is a front cross-sectional view of a novel centrifugal pump liquid level monitoring and interlocking mechanism applied to a centrifugal pump body in Example 1 of the present application.

[0030] Figure 4 This is a front cross-sectional view of a novel centrifugal pump liquid level monitoring and interlocking mechanism applied to a centrifugal pump body in Example 2 of the present application.

[0031] Description of reference numerals: 1. Centrifugal pump body; 2. Monitoring module; 3. Water diversion module; 4. DCS module; 5. Liquid level sensor; 51. Sensor body; 52. Sensor probe; 6. Differential pressure transmitter; 61. Transmitter body; 62. Transmitter probe; 621. High-pressure probe; 622. Low-pressure probe; 7. Transmission module; 71. Blocking assembly; 711. Blocking plate; 712. Blocking bag; 713. Connecting rod; 72. Alarm assembly; 721. Alarm light; 722. First alarm block; 723. Second alarm block; 8. Limit plate; 9. Slide rail. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The embodiment of the present application discloses a novel liquid level monitoring and interlocking mechanism for a centrifugal pump.

[0034] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] It should also be noted that in the embodiments of the present application, regarding the centrifugal pump, there are various types of centrifugal pumps, and the one shown in the drawings of the present application specification is only one of them. Simple improvements based only on the inventive concept of the present application should fall within the scope of protection of the present application.

[0036] Reference Figure 1 A novel centrifugal pump liquid level monitoring and interlocking mechanism includes a monitoring module 2, a water diversion module 3, and a DCS module 4. Whether it is a water filling test before using the centrifugal pump or during the use of the centrifugal pump, by using the monitoring and interlocking mechanism of the present application, during use, the monitoring module 2 can accurately monitor the water level in the centrifugal pump and transmit the signal to the DCS module 4. After receiving the signal, the DCS module 4 will transmit the signal to the water diversion module 3. After receiving the signal, the water diversion module 3 decides whether to continue or stop water injection, thereby effectively reducing the occurrence of excessive water injection. The whole process is safe, stable and has high sales. The present application realizes the automation of the preparation work before starting the centrifugal pump and ensures that the centrifugal pump reaches the effect of accurate water injection to a certain extent.

[0037] It should be noted here that in the embodiment of the present application, the centrifugal pump can be injected with water or the liquid to be transmitted. It should be noted that water is mainly used for description in the present application, and no specific liquid is used for description. This is relatively easy to understand for those skilled in the art, so no excessive elaboration is made in the embodiment of the present application.

[0038] At the same time, a specific explanation of DCS module 4 is also needed. DCS (Distributed Control System) is an automated control system widely used in industrial process control. Its main function is to centrally monitor and control the equipment and operations in the entire production process, including the operation of centrifugal pumps.

[0039] Example 1 In this embodiment, refer to Figure 1 , Figure 2 and Figure 3 The monitoring module 2 is arranged on the centrifugal pump body 1. Specifically, the monitoring module 2 is a liquid level sensor 5, and the liquid level sensor 5 includes a sensor body 51 and a sensor probe 52. The sensor body 51 is located on the centrifugal pump body 1, and the sensor probe 52 passes through the centrifugal pump body 1 and can contact the liquid in the centrifugal pump body 1.

[0040] The advantage of the above arrangement is that the liquid level sensor 5 is directly mounted on the centrifugal pump body 1, which can accurately and in real time reflect the liquid level of the liquid in the pump, ensure that the pump operates at an appropriate liquid level, and avoid dry operation due to too low a liquid level or overflow due to too high a liquid level. At the same time, by directly contacting the liquid in the pump through the sensor probe 52, more accurate liquid level data can be obtained, which is more accurate than non-contact measurement, can reflect liquid level changes more timely, and provide rapid response.

[0041] Specifically, in this embodiment, the water diversion module 3 is detachably connected to the centrifugal pump body 1, and the water diversion module 3 includes a water diversion pump, which adjusts the water level according to the signal transmitted to the DCS module 4 by the liquid level sensor 5 or the differential pressure transmitter 6. The DCS module 4 is arranged outside the centrifugal pump body 1, and the monitoring module 2 and the water diversion module 3 are both electrically connected to the DCS module 4.

[0042] The water pump can automatically adjust the water level according to the signal of the liquid level sensor 5 or the differential pressure transmitter 6, reducing the need for human intervention, ensuring that the pump is always at the appropriate liquid level, and further reducing the risk of dry running or excessive liquid in the pump. The monitoring data is transmitted to the water pump through the DCS module 4 to realize intelligent automatic control and ensure the continuity and stability of the system operation. For long-term running pump systems, this design can improve efficiency and reduce downtime.

[0043] Specifically, in order to make the centrifugal pump of the present application run more safely and stably, a transmission module 7 is further provided on the centrifugal pump body 1 , and the transmission module 7 includes a blocking component 71 and an alarm component 72 .

[0044] The setting of the transmission module 7 has a protective effect. The blocking component 71 in the transmission module 7 can block when there is a problem with the pump (such as too low liquid level or other faults) to protect the inside of the pump from damage. At the same time, the alarm component 72 issues a warning in time, allowing the system to detect problems as early as possible and take corresponding measures. At the same time, the design combines physical protection and alarm functions to improve the safety protection level of the equipment. Operators can respond quickly to the prompts of the alarm component 72 to reduce the impact of the fault on the system.

[0045] Furthermore, the blocking assembly 71 includes a blocking plate 711 , a blocking bag 712 and a connecting rod 713 . The blocking plate 711 is slidably connected to the inner wall of the centrifugal pump body 1 . One end of the connecting rod 713 is vertically fixed to the blocking plate 711 , and the other end is fixedly connected to the blocking bag 712 .

[0046] The setting of sliding plugging, the plugging plate 711 is installed on the inner wall of the pump through a sliding structure. This design makes the plugging action more stable and reliable, and reduces the possibility of plugging failure due to friction or jamming. At the same time, the fixed design of the connecting rod 713 and the plugging capsule 712 ensures that the plugging structure will not loosen or fall off during movement, thereby improving the reliability of the entire system. Further improving the stability of the plugging assembly 71 of the present application.

[0047] Furthermore, a limit plate 8 and a slide rail 9 are provided between the blocking plate 711 and the inner side wall of the centrifugal pump body 1 . The limit plate 8 is used to limit the blocking assembly 71 , and the blocking plate 711 can slide on the slide rail 9 .

[0048] The combination of the limit plate 8 and the slide rail 9 ensures that the blocking plate 711 can be accurately positioned in the event of a failure to prevent it from deviating from the normal track. The limit plate 8 prevents the blocking plate 711 from sliding excessively or insufficiently, while the slide rail 9 ensures the smoothness of the blocking action and can achieve accurate blocking.

[0049] Furthermore, the blocking capsule 712 is made of a polymer waterproof material. In the embodiment of the present application, the blocking capsule 712 is made of a polyurethane waterproof material. In other embodiments, a polymer waterproof material such as PE waterproof material, PP waterproof material, CPE waterproof material, etc. can also be used to make the blocking capsule 712 of the present application.

[0050] The plugging capsule 712 is made of polymer waterproof material, which has strong corrosion resistance, wear resistance and waterproof performance, and is particularly suitable for use under harsh working conditions. Its waterproof characteristics can effectively prevent liquid leakage inside the pump body and protect internal equipment. The use of polymer materials not only improves the waterproof effect, but also prolongs the service life of the equipment and reduces maintenance frequency and cost.

[0051] Specifically, regarding the alarm component 72, the alarm component 72 includes an alarm light 721, a first alarm block 722, and a second alarm block 723. The alarm light 721 is arranged on the centrifugal pump body 1, the first alarm block 722 is fixedly connected to the alarm light 721 switch, and the second alarm block 723 is fixedly connected to one end of the blocking plate 711 close to the alarm light 721. The first alarm block 722 and the second alarm block 723 are both magnetic blocks, and the first alarm block 722 and the second alarm block 723 can repel each other.

[0052] The magnetic repulsion design of the first alarm block 722 and the second alarm block 723 can ensure that when the blocking component 71 is activated, the switch of the alarm light 721 is triggered in time. This non-contact triggering method can avoid mechanical wear and respond more quickly and accurately. The alarm light 721 serves as an intuitive signal prompt, allowing operators to identify problems at the first time and take timely actions.

[0053] Furthermore, the alarm component 72 also includes an alarm whistle, which is connected in series with the alarm light 721. In the embodiment of the present application, the alarm whistle is built into the alarm light 721, so the alarm whistle is not specifically shown in the drawings of the specification.

[0054] The series use of the alarm light 721 and the alarm whistle increases the diversity of the alarm. It can not only warn visually, but also increase the coverage of the alarm through auditory signals. Especially in a noisy environment, auditory alarms are very important. Multiple alarms can ensure that even if the operator does not pay attention to the light signal for a while, the sound of the alarm whistle can attract enough attention, thereby further improving the safety and response speed of the system.

[0055] Example 2 Reference Figure 4 The difference between Example 2 of the present application and Example 1 is that the monitoring module 2 used is different.

[0056] In Example 2 of the present application, the monitoring module 2 is a differential pressure transmitter 6, which includes a transmitter body 61 and a transmitter probe 62. The transmitter body 61 is located on the centrifugal pump body 1, and the transmitter probe 62 includes a high-pressure probe 621 and a low-pressure probe 622. The high-pressure probe 621 is set at the high-pressure point of the centrifugal pump body 1, and the low-pressure probe 622 is set at the low-pressure point of the centrifugal pump body 1.

[0057] In this embodiment, the differential pressure transmitter 6 is used to monitor the pressure difference of the liquid through the difference in the installation positions of the high and low pressure probes 622, and indirectly reflects the liquid level. This method is very effective in high temperature, high pressure or complex media environments, and is suitable for industrial environments with higher requirements. The high and low pressure probes 622 are respectively arranged at different pressure points of the pump, which can better adapt to complex operating environments, especially when the pump is in different operating states, and can accurately monitor the liquid level.

[0058] The implementation principle of a novel liquid level monitoring and interlocking mechanism for a centrifugal pump in an embodiment of the present application is as follows: the liquid level monitoring and interlocking mechanism of the present application is set as a combination of a monitoring module 2, a water diversion module 3 and a DCS module 4, so that during the use of the centrifugal pump, the monitoring module 2 monitors the water level in the centrifugal pump and transmits the signal to the DCS module 4. After receiving the water level signal, the DCS module 4 transmits the signal to the water diversion module 3. After receiving the signal, the water diversion module 3 effectively adjusts the water level in the centrifugal pump, thereby putting the centrifugal pump in the best working state. Compared with the related technology, the whole process is more efficient and more stable. The present application realizes the automation of the preparation work before starting the centrifugal pump and ensures that the centrifugal pump reaches the effect of accurate water filling to a certain extent.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A novel centrifugal pump liquid level monitoring and interlocking mechanism, characterized in that: include: A monitoring module (2) is arranged on the centrifugal pump body (1); A water diversion module (3) is detachably connected to the centrifugal pump body (1); and A DCS module (4) is arranged outside the centrifugal pump body (1), and the monitoring module (2) and the water diversion module (3) are both electrically connected to the DCS module (4).

2. According to claim 1, a novel centrifugal pump liquid level monitoring and interlocking mechanism is characterized in that: The monitoring module (2) is a liquid level sensor (5), the liquid level sensor (5) comprising a sensor body (51) and a sensor probe (52), the sensor body (51) being located on the centrifugal pump body (1), the sensor probe (52) passing through the centrifugal pump body (1) and being capable of contacting liquid in the centrifugal pump body (1).

3. According to claim 1, a novel centrifugal pump liquid level monitoring and interlocking mechanism is characterized in that: The monitoring module (2) is a differential pressure transmitter (6), the differential pressure transmitter (6) comprising a transmitter body (61) and a transmitter probe (62), the transmitter body (61) being located on the centrifugal pump body (1), the transmitter probe (62) comprising a high-pressure probe (621) and a low-pressure probe (622), the high-pressure probe (621) being arranged at a high-pressure point of the centrifugal pump body (1), and the low-pressure probe (622) being arranged at a low-pressure point of the centrifugal pump body (1).

4. A novel centrifugal pump liquid level monitoring and interlocking mechanism according to any one of claims 2 or 3, characterized in that: The water diversion module (3) comprises a water diversion pump, and the water diversion pump adjusts the water level according to the signal transmitted to the DCS module (4) by the liquid level sensor (5) or the differential pressure transmitter (6).

5. According to claim 1, a novel centrifugal pump liquid level monitoring and interlocking mechanism is characterized in that: A transmission module (7) is also provided on the centrifugal pump body (1), and the transmission module (7) comprises a blocking component (71) and an alarm component (72).

6. A novel centrifugal pump liquid level monitoring and interlocking mechanism according to claim 5, characterized in that: The blocking assembly (71) comprises a blocking plate (711), a blocking capsule (712) and a connecting rod (713); the blocking plate (711) is slidably connected to the inner wall of the centrifugal pump body (1); one end of the connecting rod (713) is vertically fixed to the blocking plate (711), and the other end is fixedly connected to the blocking capsule (712).

7. A novel centrifugal pump liquid level monitoring and interlocking mechanism according to claim 6, characterized in that: A limit plate (8) and a slide rail (9) are also provided between the blocking plate (711) and the inner side wall of the centrifugal pump body (1); the limit plate (8) is used to limit the blocking assembly (71); and the blocking plate (711) is capable of sliding on the slide rail (9).

8. A novel centrifugal pump liquid level monitoring and interlocking mechanism according to claim 6, characterized in that: The blocking capsule (712) is made of a polymer waterproof material.

9. A novel centrifugal pump liquid level monitoring and interlocking mechanism according to claim 6, characterized in that: The alarm component (72) comprises an alarm light (721), a first alarm block (722), and a second alarm block (723); the alarm light (721) is arranged on the centrifugal pump body (1); the first alarm block (722) is fixedly connected to a switch of the alarm light (721); the second alarm block (723) is fixedly connected to an end of the blocking plate (711) close to the alarm light (721); the first alarm block (722) and the second alarm block (723) are both magnetic blocks; the first alarm block (722) and the second alarm block (723) are capable of repelling each other.

10. A novel centrifugal pump liquid level monitoring and interlocking mechanism according to claim 9, characterized in that: The alarm component (72) further comprises an alarm horn, wherein the alarm horn is arranged in series with the alarm light (721).

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