An oil pump motor anti-reverse rotation monitoring and alarming device

Abstract

The utility model discloses a kind of oil pump motor anti-reverse monitoring alarm device, including oil pump motor and oil pump, the oil outlet of oil pump is equipped with liquid passing block, oil passage is provided in liquid passing block, pressure sensor is installed on liquid passing block, the oil inlet of liquid passing block is provided with the communication of oil passage, the oil outlet of liquid passing block is provided with the communication of oil passage, the oil inlet of liquid passing block is connected on the oil outlet of oil pump, the oil outlet of liquid passing block is connected with oil liquid delivery pipeline.This utility model structure design is reasonable, by installing liquid passing block in the oil outlet of oil pump, and install pressure sensor on liquid passing block for real-time monitoring oil pressure, and then can judge whether oil pump motor is reversed according to oil pressure size, when oil pump motor reverses, audible and visual alarm can issue audible and visual warning, and then remind staff to find and handle in time, avoid oil pump long-term reverse and increase internal component wear, greatly improve the service life of oil pump.

Description

Technical Field

[0001] This utility model belongs to the technical field of motor monitoring devices, specifically relating to an anti-reverse rotation monitoring and alarm device for an oil pump motor. Background Technology

[0002] In coal mining, roadheader is one of the most commonly used mining equipment, integrating coal cutting, transportation, temporary support, and anchor bolt support into a comprehensive tunneling machine. The swashplate axial piston pump (hereinafter referred to as the oil pump), as the power component in the roadheader's hydraulic system, converts mechanical energy into hydraulic energy and outputs it to the roadheader system. Its performance directly affects the stability of the entire hydraulic system. The power supply direction of the roadheader's oil pump motor is closely related to the pump's rotation direction. Therefore, incorrect power supply can cause the single-acting oil pump to reverse, resulting in the flow channels of the suction and discharge ports being reversed. This leads to frequent cavitation and even cavitation, ultimately making it difficult to build up standby pressure and failing to meet rated requirements. Simultaneously, because the vibration damping grooves and damping orifices in the high-low pressure transition area of ​​the single-acting oil pump fail to provide a transition buffer when it reverses, pump body vibration increases. Prolonged reverse rotation increases the wear of internal components, significantly reducing their service life, restricting roadheader efficiency, and causing losses to the production unit. Therefore, it is necessary to propose an anti-reverse rotation monitoring and alarm device for the oil pump motor to solve the above problems. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an oil pump motor anti-reverse monitoring and alarm device to address the shortcomings of the prior art. The device has a reasonable structural design. By installing a liquid block at the oil pump's discharge port and installing a pressure sensor on the liquid block for real-time monitoring of oil pressure, it can determine whether the oil pump motor has reversed. When the oil pump motor reverses, an audible and visual alarm will be activated to remind the staff to detect and deal with the problem in time, thus avoiding prolonged reverse rotation of the oil pump and increasing the wear of internal components, greatly improving the service life of the oil pump, and improving the efficiency of excavation and anchoring.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an anti-reverse rotation monitoring and alarm device for an oil pump motor, including an oil pump motor and an oil pump. A liquid-passing block is installed at the oil outlet of the oil pump. An oil channel is provided inside the liquid-passing block. A pressure sensor is installed on the liquid-passing block. The monitoring end of the pressure sensor extends into the liquid-passing block and contacts the oil in the oil channel. One end of the liquid-passing block is provided with an oil inlet communicating with the oil channel. The other end of the liquid-passing block is provided with an oil outlet communicating with the oil channel. The oil inlet of the liquid-passing block is connected to the oil outlet of the oil pump. The oil outlet of the liquid-passing block is connected to the oil delivery pipeline.

[0005] The pressure sensor is connected to the roadheader control system, and the roadheader control system is connected to an audible and visual alarm.

[0006] Furthermore, one side of the liquid block, away from the oil outlet, protrudes outward to form a connecting surface for connection with the oil pump. The oil inlet is located on the connecting surface, and the center line of the oil inlet is perpendicular to the center line of the oil outlet.

[0007] Furthermore, the liquid transfer block is connected to the oil pump by screws, and the liquid transfer block has multiple screw mounting holes for screw installation, the center line of the screw mounting holes being parallel to the center line of the oil inlet.

[0008] Furthermore, the liquid-passing block is provided with two sensor mounting holes, which are threaded holes, and the pressure sensor is threadedly installed in one of the sensor mounting holes.

[0009] Furthermore, an annular groove is provided at the oil inlet, and an O-ring is fitted inside the annular groove.

[0010] Furthermore, the liquid-passing block is a high-strength steel structure with pressure resistance and corrosion resistance.

[0011] This utility model has the following advantages compared with the prior art:

[0012] This utility model has a reasonable structural design. By installing a liquid block at the oil pump's discharge port and a pressure sensor on the liquid block for real-time monitoring of oil pressure, it can determine whether the oil pump motor has reversed. When the oil pump motor reverses, an audible and visual alarm will be activated to remind workers to detect and handle the situation in time, thus avoiding prolonged reverse rotation of the oil pump and increasing wear on internal components. This greatly improves the service life of the oil pump and enhances the efficiency of excavation and anchoring.

[0013] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the oil pump of this utility model.

[0016] Figure 3 This is a schematic diagram of the liquid transfer block of this utility model.

[0017] Figure 4 This is a schematic diagram of the oil outlet on the liquid transfer block of this utility model.

[0018] Figure 5 This is a circuit block diagram of the present invention.

[0019] Figure 6This is a circuit diagram of the conversion circuit of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Oil pump motor; 2. Oil pump; 3. Oil drain port; 4. Fluid block; 5. Oil inlet; 6. Oil outlet; 7. Connecting surface; 8. Screw mounting hole; 9. Sensor mounting hole; 10. Pressure sensor; 11. Audible and visual alarm; 12. Tunneling and anchoring machine control system; 13. Relay; 14. Conversion circuit; 15. O-ring seal. Detailed Implementation

[0022] like Figures 1 to 5 As shown, this utility model includes an oil pump motor 1 and an oil pump 2. A liquid-passing block 4 is installed at the oil outlet 3 of the oil pump 2. An oil passage is provided inside the liquid-passing block 4. A pressure sensor 10 is installed on the liquid-passing block 4. The monitoring end of the pressure sensor 10 extends into the liquid-passing block 4 and contacts the oil in the oil passage. One end of the liquid-passing block 4 is provided with an oil inlet 5 communicating with the oil passage. The other end of the liquid-passing block 4 is provided with an oil outlet 6 communicating with the oil passage. The oil inlet 5 of the liquid-passing block 4 is connected to the oil outlet 3 of the oil pump 2. The oil outlet 6 of the liquid-passing block 4 is connected to the oil delivery pipeline.

[0023] The pressure sensor 10 is connected to the tunneling and anchoring machine control system 12, and the tunneling and anchoring machine control system 12 is connected to the audible and visual alarm 11.

[0024] In actual use, by installing a liquid block 4 at the oil outlet 3 of the oil pump 2 and a pressure sensor 10 on the liquid block 4 to monitor the oil pressure in real time, it is possible to determine whether the oil pump motor 1 has reversed based on the oil pressure. When the oil pump motor 1 reverses, the audible and visual alarm 11 can issue an audible and visual warning, thereby reminding the staff to discover and deal with it in time, avoiding the oil pump 2 from reversing for a long time and increasing the wear of internal components, greatly improving the service life of the oil pump 2, and improving the excavation and anchoring efficiency.

[0025] In specific implementation, the pressure sensor 10 is model CYB-20S, and the audible and visual alarm 11 is model KXB12. The audible and visual alarm 11 is installed on the frame of the tunneling and anchoring machine. A relay 13 is connected in series in the power supply circuit of the audible and visual alarm 11. The output signal of the tunneling and anchoring machine control system 12 triggers the relay 13 to close, thereby controlling the power supply or power cut-off of the audible and visual alarm 11.

[0026] like Figure 3 As shown in this embodiment, the end of the liquid block 4 away from the oil outlet 6 protrudes outward to form a connecting surface 7 for connecting with the oil pump 2. The oil inlet 5 is provided on the connecting surface 7, and the center line of the oil inlet 5 is perpendicular to the center line of the oil outlet 6.

[0027] In actual use, the oil outlet 6 is located on the end face of the liquid flow block 4.

[0028] In this embodiment, the liquid transfer block 4 is connected to the oil pump 2 by screws. The liquid transfer block 4 has a plurality of screw mounting holes 8 for screw installation. The center line of the screw mounting holes 8 is parallel to the center line of the oil inlet 5.

[0029] In actual use, there are four screw mounting holes 8, with two screw mounting holes 8 provided at the top and bottom of the oil inlet 5.

[0030] In practice, all four screw mounting holes 8 are located on the connecting surface 7 and pass through both sides of the liquid block 4.

[0031] like Figure 3 and Figure 4 As shown in this embodiment, the liquid flow block 4 is provided with two sensor mounting holes 9, which are threaded holes, and the pressure sensor 10 is threadedly installed in one of the sensor mounting holes 9.

[0032] In actual use, when only oil pressure needs to be measured, the pressure sensor 10 is installed in one sensor mounting hole 9, and the other sensor mounting hole 9 is sealed with a plug to prevent leakage.

[0033] like Figure 3 As shown in this embodiment, an annular groove is provided at the oil inlet 5, and an O-ring seal 15 is fitted inside the annular groove.

[0034] In actual use, the O-ring 15 can seal the connection between the oil inlet 5 of the liquid block 4 and the oil outlet 3 of the oil pump 2, thereby increasing the sealing performance.

[0035] In this embodiment, the liquid-passing block 4 is a high-strength steel structure with pressure resistance and corrosion resistance.

[0036] In actual use, the liquid-passing block 4 is made of high-strength steel, which has good pressure resistance and corrosion resistance.

[0037] In actual use, this utility model can be assembled simply by fixing the liquid-passing block 4 to the oil pump 2 with screws, aligning the oil inlet 5 of the liquid-passing block 4 with the oil outlet 3 of the oil pump 2, and then connecting the oil outlet 6 of the liquid-passing block 4 to the oil delivery pipeline.

[0038] In actual operation, the oil pump 2 flows through the hydraulic block 4 to the hydraulic system. The pressure sensor 10 monitors the pressure within the hydraulic block 4 and transmits the monitoring data to the roadheader control system 12. After processing the data, the roadheader control system 12 displays it on the screen. When the oil pump motor 1 reverses, and the monitoring value of the pressure sensor 10 reaches the set value, the roadheader control system 12 will activate the audible and visual alarm 11 to issue a warning; at the same time, the display screen will show relevant data for the user to analyze.

[0039] In addition, the power supply circuit of the oil pump motor 1 has a conversion circuit 14. The conversion circuit 14 enables the monitoring and alarm device to add a motor reversal automatic reversal function, that is, the oil pump motor 1 is reversed through the conversion circuit 14, so that the oil pump motor 1 operates according to the corresponding control circuit.

[0040] like Figure 6 As shown, the conversion circuit 14 includes a control circuit one, a control circuit two, and a disconnecting switch. The power supply terminals of the control circuit one are U1, V1, and W1, and the vacuum contactor is KM1. The power supply terminals of the control circuit two are U2, V2, and W2, and the vacuum contactor is KM2. The disconnecting switch is QS1.

[0041] After oil pump 2 is started, isolating switch QS1 closes, and the roadheader control system 12 sends a start signal for control circuit one by default. Vacuum contactor KM1 engages, and oil pump motor 1 starts to work normally. According to the set parameters, the roadheader control system 12 starts to acquire the monitoring value of pressure sensor 10 2 seconds after oil pump motor 1 is powered on and judges the value. If the value is greater than the initial set pressure threshold for 3 consecutive seconds, the roadheader control system 12 does not take any action, and oil pump motor 1 continues to execute control circuit one; if the value is less than the initial set pressure threshold for 3 consecutive seconds, the roadheader control system 12 will automatically cut off control circuit one, vacuum contactor KM1 will open, oil pump motor 1 will execute control circuit two, vacuum contactor KM2 will engage, oil pump motor 1 will reverse, and the contactor contact register address will be changed. After the control circuit conversion is completed, the tunneling and anchoring machine control system 12 will continue to collect data through the pressure sensor 10. When the second control circuit fails again, the control system will cut off the first control circuit and the second control circuit, the vacuum contactors KM1 and KM2 will be disconnected, and the oil pump fault program will be entered, causing the oil pump to stop running.

[0042] Similarly, the monitoring time interval of the pressure sensor 10 can be modified according to actual needs. Each time the control circuit one switches to the control circuit two or reports a fault, the tunneling and anchoring machine control system 12 will activate the audible and visual alarm 11 to issue a warning, and at the same time, the display screen of the operation terminal will send relevant data for the user to analyze.

[0043] In practical use, this device is also suitable for upgrading traditional oil pumps, enabling them to monitor motor forward and reverse rotation. In actual operation, simply connect the inlet 5 of the fluid block 4 to the outlet 3 of the oil pump 2, and then connect the outlet 6 of the fluid block 4 to the oil delivery pipeline to complete the assembly of the monitoring and alarm device. Upgrading traditional oil pumps requires an additional control system.

[0044] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A monitoring and alarm device for preventing reverse rotation of an oil pump motor, comprising an oil pump motor (1) and an oil pump (2), characterized in that: The oil pump (2) has a liquid flow block (4) installed at its oil outlet (3). The liquid flow block (4) has an oil channel. A pressure sensor (10) is installed on the liquid flow block (4). The monitoring end of the pressure sensor (10) extends into the liquid flow block (4) and contacts the oil in the oil channel. One end of the liquid flow block (4) has an oil inlet (5) that communicates with the oil channel. The other end of the liquid flow block (4) has an oil outlet (6) that communicates with the oil channel. The oil inlet (5) of the liquid flow block (4) is connected to the oil outlet (3) of the oil pump (2). The oil outlet (6) of the liquid flow block (4) is connected to the oil delivery pipeline. The pressure sensor (10) is connected to the tunneling and anchoring machine control system (12), and the tunneling and anchoring machine control system (12) is connected to the audible and visual alarm (11).

2. The oil pump motor anti-reverse rotation monitoring and alarm device according to claim 1, characterized in that: The end of the liquid block (4) away from the oil outlet (6) protrudes outward to form a connecting surface (7) for connecting with the oil pump (2). The oil inlet (5) is provided on the connecting surface (7), and the center line of the oil inlet (5) is perpendicular to the center line of the oil outlet (6).

3. The oil pump motor anti-reverse rotation monitoring and alarm device according to claim 1, characterized in that: The liquid transfer block (4) is connected to the oil pump (2) by screws. The liquid transfer block (4) has multiple screw mounting holes (8) for screw installation. The center line of the screw mounting holes (8) is parallel to the center line of the oil inlet (5).

4. The oil pump motor anti-reverse rotation monitoring and alarm device according to claim 1, characterized in that: The liquid block (4) is provided with two sensor mounting holes (9), the sensor mounting holes (9) are threaded holes, and the pressure sensor (10) is threadedly installed in one of the sensor mounting holes (9).

5. The oil pump motor anti-reverse rotation monitoring and alarm device according to claim 1, characterized in that: An annular groove is provided at the oil inlet (5), and an O-ring (15) is fitted inside the annular groove.

6. The oil pump motor anti-reverse rotation monitoring and alarm device according to claim 1, characterized in that: The liquid-passing block (4) is a high-strength steel structure with pressure resistance and corrosion resistance.

Images