Horizontal centrifugal pump capable of exhausting air automatically

Abstract

The utility model provides a horizontal centrifugal pump capable of exhausting air automatically. The horizontal centrifugal pump capable of exhausting air automatically comprises a pump body, a centrifugal pump body and a centrifugal pump body, wherein the pump body comprises a shell and a cavity defined by the shell; the liquid level sensor is mounted on the inner side of the shell at the top of the cavity; the electromagnetic valve is mounted on the outer side of a shell at the top of the pump body and is communicated with the cavity; and the automatic control system is electrically connected with the liquid level sensor and the electromagnetic valve. By introducing an automatic control and monitoring mechanism, the exhaust flow of the horizontal centrifugal pump is simplified, and the intelligent level and the operation efficiency of equipment are greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil pumps, and particularly relates to a horizontal centrifugal pump with automatic air exhaust. Background Art

[0002] With the rapid development of the civil aviation industry, the oil supply volume of airport oil depots has been increasing year by year. As a key equipment in airport oil depots, oil pumps need to operate stably and be easy to maintain during long-term and frequent operation. Due to reasons such as its overall compact structure, light weight, small volume, low noise, significant energy saving, and convenient maintenance, horizontal centrifugal pumps are widely used in airport oil depot systems. However, in the actual use process of airport oil depots, due to structural reasons, horizontal centrifugal pumps have problems such as a large height difference, many pipe networks, uneven refueling amounts for each flight, and different peak periods of daily flight volumes. These problems make horizontal centrifugal pumps prone to mechanical seal wear and damage. After years of operation of airport oil depots and analysis of the faults of horizontal centrifugal pumps, it is found that the main reason is the operation with air in the pump body, resulting in the idling of the oil pump. Prolonged idling will cause problems such as excessive mechanical seal wear, overheating, large vibrations, and oil leakage. To solve the problem of air existing in the centrifugal pump during operation, in actual operation, air is usually exhausted through the screws at the top of the oil pump. Use tools to unscrew the screws and wait for the gas in the pump body to be exhausted before tightening the screws. As a result, operators spend a lot of time on air exhaust. Depending on the work experience of operators, some less experienced workers cannot correctly judge whether there is air intake in the oil pump based on the sound of the oil pump and the inlet and outlet pressures, resulting in the situation that the oil pump cannot operate normally due to long-term lack of air exhaust, with low production efficiency and high maintenance costs. Content of the Utility Model

[0003] In view of the above technical problems, the utility model provides a horizontal centrifugal pump with automatic air exhaust. The horizontal centrifugal pump with automatic air exhaust can automatically monitor and remove the air in the pump body, thus effectively avoiding problems such as mechanical seal wear, overheating, vibration, and oil leakage caused by air accumulation, significantly improving the operation stability and service life of the oil pump, and reducing the maintenance cost and downtime.

[0004] The specific implementation technical solution of the utility model is as follows:

[0005] A horizontal centrifugal pump with automatic air exhaust, characterized in that the horizontal centrifugal pump with automatic air exhaust includes:

[0006] A pump body, the pump body includes a housing and a cavity enclosed by the housing;

[0007] A liquid level sensor, the liquid level sensor is installed on the inner side of the housing at the top of the cavity;

[0008] The solenoid valve The solenoid valve is installed on the outer side of the top shell of the pump body and communicates with the cavity;

[0009] The automatic control system The automatic control system is electrically connected to the liquid level sensor and the solenoid valve.

[0010] Furthermore, an exhaust pipe is connected to the output end of the solenoid valve, and a second liquid level sensor is installed in the exhaust pipe. The second liquid level sensor is electrically connected to the automatic control system.

[0011] Furthermore, a second solenoid valve is provided at the liquid outlet, and the second solenoid valve is electrically connected to the automatic control system.

[0012] Furthermore, the automatic control system includes a PLC controller. The input end of the PLC controller is electrically coupled to the first liquid level sensor, and the output end of the PLC is electrically coupled to the first solenoid valve and the second solenoid valve. The PLC controller is configured to control the second solenoid valve to close and the first solenoid valve to open when the first liquid level sensor outputs a low level.

[0013] Furthermore, the input end of the PLC controller is electrically coupled to the second liquid level sensor, and the output end of the PLC controller is electrically coupled to the first solenoid valve and the second solenoid valve. The PLC controller is configured to control the first solenoid valve to close and the second solenoid valve to open when the second liquid level sensor outputs a low level.

[0014] Furthermore, the automatic control system further includes a remote monitoring unit, and the remote monitoring unit is signal-connected to the PLC controller.

[0015] The beneficial technical effects of the present utility model are:

[0016] By introducing an automated control and monitoring mechanism, the utility model not only simplifies the air exhaust process of the horizontal centrifugal pump but also significantly improves the intelligent level and operating efficiency of the equipment. Specifically, when air accumulates in the pump body due to factors such as height difference, complex pipe network, or uneven fuel filling volume, the liquid level sensor can quickly detect the abnormal liquid level (i.e., the liquid level drop caused by air occupying space) and immediately transmit this signal to the automatic control system. As the core processing unit, the PLC controller will quickly respond after receiving the low-level signal, close the second solenoid valve at the liquid outlet, and simultaneously open the solenoid valve at the top to discharge the air in the pump body through the exhaust pipe. Further, the second liquid level sensor added in the exhaust pipe constitutes a double guarantee. When the gas in the pipe is basically exhausted and the liquid starts to flow out during the exhaust process, the second liquid level sensor will detect the rising liquid level and send a high-level signal to the PLC controller. At this time, the controller will close the solenoid valve at the top and reopen the second solenoid valve to resume normal liquid transportation. This design effectively avoids the risk of liquid waste caused by excessive exhaust or dry running of the pump body caused by incomplete exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the use of the utility model.

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 3 It is a schematic cross-sectional view of the overall structure of the utility model.

[0020] Figure 4 It is a schematic diagram of the control system structure of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following embodiments further illustrate the content of the utility model but should not be construed as a limitation to the utility model. Without departing from the spirit and essence of the utility model, any modification or replacement made to the method, steps, or conditions of the utility model shall fall within the scope of the utility model.

[0022] As Figure 1 shown, at the airport, when refueling an aircraft, the oil tank 10 on the oil tanker is connected to the liquid inlet 102 of the pump body 1 of the horizontal centrifugal pump, and the liquid outlet of the pump body 1 is connected to the fuel filling port of each aircraft.

[0023] As Figure 2As shown in FIGS. 2 or 3, a centrifugal pump, as a mechanical device widely used in the field of liquid transportation, its working principle is based on the centrifugal force principle. When the motor drives the pump shaft 9 to rotate, the impeller 8 installed on the pump shaft also rotates at a high speed. The blade design of the impeller 8 enables the liquid to obtain centrifugal force during rotation, so that the liquid is thrown towards the outer edge of the impeller and enters the liquid outlet 103 of the pump along the flow channel of the pump casing. At the same time, a low-pressure area is formed at the center of the impeller 8, attracting more liquid into the pump to form a continuous liquid flow. In the airport oil depot system, horizontal centrifugal pumps are widely used due to their unique structural advantages and high transportation efficiency. However, as mentioned above, due to the complexity of the actual operating environment and the instability of the refueling volume, air is likely to accumulate in the pump body, affecting the normal operation of the pump and the service life of the mechanical seal. It should be noted that the structures of the centrifugal pumps in the present utility model, except for the improvements of this application, are all prior arts and will not be described in detail in this specification.

[0024] The present utility model proposes a horizontal centrifugal pump with automatic air exhaust, which realizes the automatic monitoring and removal of air in the pump body by introducing an automatic control and monitoring mechanism. The model numbers of the liquid level sensors used in the present utility model are 1043-P and 1078-SL, and the liquid level sensors can detect the presence or absence of liquid level or liquid level changes.

[0025] In some embodiments, referring to Figure 1 , a horizontal centrifugal pump with automatic air exhaust, the horizontally centrifugal pump capable of automatic air exhaust includes: a pump body 1, the pump body includes a housing and a cavity 101 enclosed by the housing, the cavity 101 is communicated with a liquid inlet 102 and a liquid outlet 103; a first liquid level sensor 2, the first liquid level sensor 2 is installed on the inner side of the housing at the top of the cavity; a first electromagnetic valve 3, the electromagnetic valve 3 is installed on the outer side of the top housing of the pump body 1, and the input end of the electromagnetic valve 3 is communicated with the cavity; an automatic control system 4, the automatic control system is electrically connected to the liquid level sensor 2 and the electromagnetic valve 3.

[0026] In this embodiment, when air accumulates inside the cavity of the pump body 1 due to reasons such as height difference, complex pipe network or uneven refueling volume, since the density of air is much lower than that of the liquid, the air will gather at the top of the cavity, resulting in a decrease in the liquid level in the cavity. The first liquid level sensor 2 cannot sense the liquid level, and then sends a low-level signal to the automatic control system 4. After receiving the low-level signal, the automatic control system will control the first electromagnetic valve 3 on the outer side of the top housing of the pump body 1 to open, and the air accumulated at the top of the cavity will be discharged from the first electromagnetic valve 3.

[0027] In some embodiments, in order to further ensure that the air accumulated in the cavity is completely discharged, as Figure 2As shown in Fig. 2 or Fig. 3, the output end of the solenoid valve 3 is connected to an exhaust pipe 5, and a second liquid level sensor 6 is installed in the exhaust pipe. The second liquid level sensor is electrically connected to the automatic control system 4.

[0028] In this embodiment, when the air accumulated in the cavity 101 is discharged through the first solenoid valve 3, in order to ensure that the gas is completely discharged, an exhaust pipe 5 is added to the output end of the first solenoid valve, and a second liquid level sensor 6 is added in the exhaust pipe 5 as a monitoring point. This design makes the entire exhaust process complete and thorough. Specifically, when the air in the cavity 101 of the pump body 1 starts to enter the exhaust pipe 5 through the first solenoid valve 3 and is discharged outward, the second liquid level sensor 6 continuously monitors the liquid level change in the pipe. In the initial stage, since the pipe is mainly filled with air, the second liquid level sensor 6 will not detect liquid and will remain in a high level state without triggering any action. As the air is gradually and completely discharged, the liquid in the cavity 101 starts to enter the exhaust pipe 5. At this time, the second liquid level sensor 6 will detect the liquid level and immediately convert this change into a low level signal and send it to the automatic control system 4. After receiving the low level signal sent by the second liquid level sensor 6, the PLC controller 401 in the automatic control system 4 will quickly determine that the exhaust process is completed and the air in the pump body 1 has been completely discharged. Subsequently, the PLC controller 401 will execute the preset instruction to close the first solenoid valve 3 at the top of the cavity 101 to prevent the continuous discharge of liquid;

[0029] In some embodiments, referring to Figure 2-4 As shown in the figure, a second solenoid valve 7 is provided at the liquid outlet 103. The second solenoid valve is electrically connected to the automatic control system 4. The automatic control system 4 includes a PLC controller 401. The input end of the PLC controller is electrically coupled to the first liquid level sensor 2, and the output end of the PLC is electrically coupled to the first solenoid valve 3 and the second solenoid valve 7. The PLC controller 401 is configured to control the second solenoid valve 7 to close and the first solenoid valve 3 to open when the first liquid level sensor 2 outputs a low level. The input end of the PLC controller is electrically coupled to the second liquid level sensor 6, and the output end of the PLC controller is electrically coupled to the first solenoid valve 3 and the second solenoid valve 7. The PLC controller 401 is configured to control the first solenoid valve 3 to close and the second solenoid valve 7 to open when the second liquid level sensor 6 outputs a low level.

[0030] In this embodiment, in order to better discharge the gas in the cavity 101, when the first liquid level sensor 2 detects the accumulation of air in the cavity 101, it transmits a signal to the PLC controller 401, and the PLC controller 401 then executes a preset program. Specifically, once receiving the low-level signal from the first liquid level sensor 2, the PLC controller 401 first closes the second solenoid valve 7 on the liquid outlet 103, and the PLC controller 401 quickly opens the first solenoid valve 3 outside the top shell of the pump body 1. Since the liquid outlet 103 is closed, at this time, the centrifugal pump continues to work, and the gas and liquid in the cavity 101 can only be discharged through the first solenoid valve 3 opened at the top, further ensuring the efficiency and effect of the exhaust process.

[0031] In some embodiments, the automatic control system 4 further includes a remote monitoring unit 402, and the remote monitoring unit 402 is signal-connected to the PLC controller 401. The remote monitoring unit can enable

[0032] operators to remotely monitor the operating status of the horizontal centrifugal pump, including the real-time data of the liquid level sensor, the on / off status of the solenoid valve, and the air removal situation inside the pump body. This design greatly improves the convenience and efficiency of equipment maintenance. Especially in an environment such as an airport oil depot system that requires 24-hour uninterrupted operation, the introduction of the remote monitoring unit 402 enables the staff to remotely monitor the working conditions of the centrifugal pump in the duty room, ensuring that potential problems can be discovered and handled in a timely manner, and avoiding shutdowns or safety accidents caused by equipment failures.

[0033] Specifically, the remote monitoring unit 402 can communicate with the PLC controller 401 by wired or wireless means, and receive and display in real time key parameters such as the liquid level inside the pump body, the solenoid valve status, and the air removal progress. Operators can remotely view the operating status of the equipment through a computer, mobile phone or other intelligent terminals without having to be on-site.

[0034] In summary, the horizontal centrifugal pump and its automatic control system of the present application effectively solve the operating problems caused by the accumulation of air inside the pump body through fine liquid level monitoring and solenoid valve control, and further improve the operating stability and safety of the equipment.

[0035] Although the present invention has been described in detail above with general descriptions, specific embodiments and experiments, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. An automatic exhaust horizontal centrifugal pump, characterized in that: The automatic exhaust horizontal centrifugal pump comprises: Pump body (1) The pump body (1) comprises a shell and a cavity (101) enclosed by the shell, wherein the cavity is connected to a liquid inlet (102) and a liquid outlet (103); A first liquid level sensor (2) is mounted on the inner side of the housing at the top of the cavity; A first solenoid valve (3), the solenoid valve (3) being mounted on the outer side of the top shell of the pump body (1), and the input end of the solenoid valve (3) being connected to the cavity; Automatic control system (4) The automatic control system is electrically connected to the liquid level sensor (2) and the solenoid valve (3).

2. The automatic exhaust horizontal centrifugal pump according to claim 1, characterized in that: The output end of the solenoid valve (3) is connected to an exhaust pipe (5), a second liquid level sensor (6) is installed in the exhaust pipe, and the second liquid level sensor is electrically connected to the automatic control system (4).

3. The automatic exhaust horizontal centrifugal pump according to claim 2, characterized in that: The liquid outlet is provided with a second solenoid valve (7), and the second solenoid valve is electrically connected to the automatic control system (4).

4. The automatic exhaust horizontal centrifugal pump according to claim 3, characterized in that: The automatic control system (4) comprises a PLC controller (401), an input end of the PLC controller is electrically coupled to the first liquid level sensor (2), an output end of the PLC is electrically coupled to the first solenoid valve (3) and the second solenoid valve (7), and the PLC controller (401) is configured such that when the first liquid level sensor (2) outputs a low level, the PLC controller (401) controls the second solenoid valve (7) to close and the first solenoid valve (3) to open.

5. The automatic exhaust horizontal centrifugal pump according to claim 4, characterized in that: The input end of the PLC controller is electrically coupled to the second liquid level sensor (6), and the output end of the PLC controller is electrically coupled to the first solenoid valve (3) and the second solenoid valve (7). The PLC controller (401) is configured such that when the second liquid level sensor (6) outputs a low level, the PLC controller (401) controls the first solenoid valve (3) to close and the second solenoid valve (7) to open.

6. The automatic exhaust horizontal centrifugal pump according to claim 4, characterized in that: The automatic control system (4) further comprises a remote monitoring unit (402), and the remote monitoring unit (402) is signal-connected to the PLC controller (401).

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