High-pressure multi-stage pump in-place reset device
By designing a local reset device on the high-pressure multistage pump and using components such as relays and time relays to realize a self-locking circuit and a delay function, the problem of difficult reset of high-pressure multistage pumps in open-pit mines due to power outages and other reasons is solved, and a fast and safe reset operation is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN PHOSPHATE CHEM GROUP CORP
- Filing Date
- 2025-08-21
- Publication Date
- 2026-06-26
Smart Images
Figure CN224413838U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of high-pressure multistage pump control equipment, and more specifically, to a high-pressure multistage pump local reset device. Background Technology
[0002] In the field of high-pressure multistage pump control equipment technology, efficient, convenient, and safe control devices have always been a research focus. Especially in special scenarios such as open-pit mines, the stable operation of high-pressure multistage pumps and their rapid reset after failure are crucial for production operations.
[0003] Currently, in daily excavation operations at open-pit mines, water accumulation in the pit is a frequent problem due to factors such as terrain. A large open-pit phosphate mine uses a floating pontoon equipped with a 10KV high-pressure pump to address this issue. While this high-pressure multistage pump plays a crucial role in drainage, it has significant shortcomings during operation. In the event of abnormal shutdowns such as power outages or voltage fluctuations, the floating high-pressure pump lacks a local rapid reset function. Operators must travel approximately 600 meters from the floating pontoon to reset it, a journey involving complex terrain, often involving climbing and detours, taking about 25 minutes and resulting in severe delays and significantly increasing the workload for personnel. Furthermore, at night or in inclement weather, operators face high safety risks when attempting to reset the high-voltage control panel. Utility Model Content
[0004] The purpose of this invention is to provide a local reset device for high-pressure multistage pumps, in order to solve the problem mentioned in the background art that the floating high-pressure water pump lacks a local rapid reset function when abnormal shutdown conditions such as power outages or power fluctuations occur.
[0005] To achieve the above objectives, this utility model provides a local reset device for a high-voltage multistage pump, including a local reset button installed in the control box of the floating vessel, a control cable connecting the control box and the ring main unit, and a reset control circuit installed in the ring main unit. The reset control circuit includes a first relay, a second relay, a time relay, and an AC contactor. The main contacts of the AC contactor are connected in parallel with the circuit breaker in the ring main unit to replace the circuit breaker in providing AC220V power to the high-voltage soft starter control circuit.
[0006] This setup consists of a local reset button on the floating control box, a control cable connecting the control box and the ring main unit, and a reset control circuit within the ring main unit. The main contacts of the AC contactor in the reset control circuit are connected in parallel with the circuit breaker within the ring main unit, replacing the circuit breaker to provide AC220V power to the high-voltage soft starter control circuit, thus forming a complete reset system from local operation to circuit control within the ring main unit.
[0007] Preferably, the control cable is 2x2.5mm.2 The two-core control line connects one end to the local reset button and the other end to the wiring terminal of the ring main unit.
[0008] This setting specifies that the control cable is 2x2.5mm. 2 With two-core control lines and both ends connected to the local reset button and the ring main unit terminal respectively, this type of cable can effectively transmit control signals and ensure stable and reliable signal transmission over long distances.
[0009] Preferably, the control circuit of the local reset button is configured such that the L terminal of the AC220V power supply is connected to the input terminals of the first relay, the second relay, and the time relay via the normally open contact of the local reset button, and the output terminals of each coil are connected to the N terminal of the power supply to form a closed loop.
[0010] In the control circuit of this local reset button, the AC220V power supply L terminal is connected to the input terminals of the first relay, the second relay, and the time relay via the normally open contact of the button. The output terminals of each coil are connected to the N terminal of the power supply, forming a closed circuit. When the local reset button is pressed, the normally open contact closes, the circuit is completed, and the relays and the time relay are energized and operate.
[0011] Preferably, the first relay includes a first relay normally open contact and a first relay normally closed contact. The contacts are configured such that the first relay normally open contact is connected in parallel with the normally open contact of the ring main unit's water pump reset button, and the first relay normally closed contact is connected in series with the normally closed contact of the ring main unit's water pump stop button.
[0012] In this configuration, the normally open contact of the first relay is connected in parallel with the normally open contact of the ring main unit's water pump reset button, and the normally closed contact is connected in series with the normally closed contact of the ring main unit's water pump stop button. This design enables the local reset operation to be linked with the original reset and stop buttons of the ring main unit, without affecting the original button functions, while allowing local intervention in the original control logic through the first relay.
[0013] Preferably, the second relay includes a normally closed contact and a normally open contact. The normally closed contact of the second relay is connected in series in the control circuit of the AC contactor, and the normally open contact of the second relay is connected in series with the time relay and then in parallel with the normally open contact of the local reset button to form a self-locking circuit for the reset operation.
[0014] In this configuration, the normally closed contact of the second relay is connected in series in the AC contactor control circuit, and the normally open contact is connected in series with the time relay and then in parallel with the normally open contact of the local reset button to form a self-locking circuit. When the local reset button is pressed, the second relay is energized, the normally open contact closes to achieve self-locking, and ensures that the reset process continues; at the same time, the normally closed contact opens to de-energize the AC contactor and cut off the control power supply of the high-voltage soft starter.
[0015] Preferably, the time relay is set to a delay time of 30 seconds. The time-delay disconnect contact of the time relay is connected in series in the main circuit of the reset control circuit to control the duration of the reset operation. The reset control circuit is de-energized after the time relay finishes timing and needs to be re-energized by pressing the local reset button again to close the normally open contact. The time-delay disconnect contact of the time relay opens after timing ends and automatically resets to the closed state after the reset control circuit is de-energized, preparing for the next reset operation.
[0016] This setting sets the time relay to a 30-second delay, with its delay-off contact connected in series in the main circuit of the reset control circuit. After the timer expires, the delay-off contact opens, the reset control circuit loses power, and all components return to their initial state. The delay-off contact automatically resets and closes after the circuit loses power. To reset again, the local reset button must be pressed.
[0017] Preferably, the straight-line distance between the floating vessel and the ring network cabinet is not less than 600 meters.
[0018] This setting specifies that the straight-line distance between the floating vessel and the ring main unit should not be less than 600 meters. Under this distance condition, the original reciprocating reset operation is time-consuming and inconvenient, highlighting the necessity of the on-site reset device.
[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0020] In this high-pressure multistage pump local reset device, by setting a local reset button in the floating control box, the time spent by operators traveling back and forth between the floating vessel and the ring network cabinet (the straight-line distance is not less than 600 meters) is eliminated, and the reset operation response time is shortened from about 25 minutes to instant operation. The entire reset process can be completed within 30 seconds, which greatly reduces the production impact caused by the interruption of drainage due to water accumulation in the mine pit and ensures the continuity of mining operations.
[0021] This eliminates the need for operators to travel to and from the high-voltage ring main unit in complex terrain (climbing mountains and taking detours) and in adverse weather conditions (night, rain, and snow), fundamentally eliminating safety hazards such as slipping and falling during long-distance operations and improving the safety of high-voltage equipment operation and maintenance.
[0022] By linking the first relay with the original reset / stop button of the ring main unit, local reset and compatibility with the original control circuit are achieved; the self-locking circuit formed by the second relay and the time relay ensures stable circuit conduction within the 30-second reset time. At the same time, the automatic reset function of the time relay's delayed disconnect contact ensures the continuity of multiple reset operations and avoids circuit failures caused by human error. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0024] Figure 2 This is a schematic diagram of the button wiring for the central ring network cabinet of this utility model;
[0025] Figure 3 This is a schematic diagram of the internal control circuit of the central ring network cabinet of this utility model;
[0026] The meanings of the labels in the diagram are as follows:
[0027] 1. Floating vessel; 2. High-pressure multistage pump; 3. Control box; 31. Local reset button; 4. Ring main unit; 41. Ring main unit water pump reset button; 42. Ring main unit water pump stop button; 43. Normally open contact of the first relay; 44. Normally closed contact of the first relay; 45. Microcomputer integrated controller; 5. First relay; 6. Second relay; 61. Normally closed contact of the second relay; 62. Normally open contact of the second relay; 7. Time relay; 71. Time-delay disconnect contact; 8. AC contactor. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] This utility model provides a local reset device for a high-pressure multistage pump, such as... Figures 1-3 As shown, the system includes a local reset button 31 located in the control box 3 of the floating vessel 1, a control cable connecting the control box 3 and the ring main unit 4, and a reset control circuit installed in the ring main unit 4. The reset control circuit includes a first relay 5, a second relay 6, a time relay 7, and an AC contactor 8. The main contacts of the AC contactor 8 are connected in parallel with the circuit breaker in the ring main unit 4 to replace the circuit breaker in providing AC220V power to the high-voltage soft starter control circuit.
[0030] The device consists of a local reset button 31 on the control box 3 of the floating platform 1, a control cable connecting the control box 3 and the ring main unit 4, and a reset control circuit installed inside the ring main unit 4. The reset control circuit includes a first relay 5, a second relay 6, a time relay 7, and an AC contactor 8. The main contacts of the AC contactor 8 are connected in parallel with the circuit breaker inside the ring main unit 4, allowing it to replace the circuit breaker in providing AC220V power to the high-voltage soft starter control circuit, forming a complete reset system from local operation on the floating platform 1 to circuit control within the ring main unit 4. This realizes the local reset function of the high-voltage multi-stage pump, breaking the limitation of having to go to the ring main unit 4 for reset, allowing operators to complete the operation from the control box 3 of the floating platform 1, laying the foundation for rapid pump operation recovery, and ensuring the power supply stability of the high-voltage soft starter control circuit.
[0031] In this embodiment, the control cable is 2x2.5mm. 2 The two-core control line is connected at one end to the local reset button 31 and at the other end to the wiring terminal of the ring main unit 4.
[0032] The control cable is 2x2.5mm. 2 The two-core control cable connects to the local reset button 31 on the control box 3 of the floating vessel 1 at one end and to the terminal block of the ring main unit 4 at the other end. This cable specification can effectively transmit control signals, ensuring stable and reliable signal transmission over long distances between the floating vessel 1 and the ring main unit 4. This guarantees stable transmission of control signals between the local reset button 31 on the control box 3 of the floating vessel 1 and the ring main unit 4, avoiding signal attenuation or interruption due to cable problems, and ensuring that reset operation commands are accurately transmitted to the ring main unit 4.
[0033] Specifically, the control circuit of the local reset button 31 is configured such that the L terminal of the AC220V power supply is connected to the input terminals of the first relay 5, the second relay 6, and the time relay 7 via the normally open contact of the local reset button 31, and the output terminals of each coil are connected to the N terminal of the power supply to form a closed loop.
[0034] In the control circuit of the local reset button 31 on the control box 3 of the floating vessel 1, the AC220V power supply L terminal is connected to the input terminals of the first relay 5, the second relay 6, and the time relay 7 via the normally open contact of the button. The output terminals of each coil are connected to the N terminal of the power supply to form a closed loop. When the local reset button 31 is pressed, its normally open contact closes, the loop is completed, and the first relay 5, the second relay 6, and the time relay 7 are energized and operate. This simple and effective control circuit ensures that pressing the local reset button 31 at the control box 3 of the floating vessel 1 accurately triggers the operation of the first relay 5, the second relay 6, and the time relay 7 in the ring main unit 4, providing a reliable circuit basis for initiating the reset process.
[0035] Furthermore, the first relay 5 includes a first relay normally open contact 43 and a first relay normally closed contact 44. The contact configuration is such that the first relay normally open contact 43 is connected in parallel with the normally open contact of the ring main unit water pump reset button 41, and the first relay normally closed contact 44 is connected in series with the normally closed contact of the ring main unit water pump stop button 42.
[0036] The first relay 5 includes a normally open contact 43 and a normally closed contact 44. The normally open contact 43 is connected in parallel with the normally open contact of the ring main unit's water pump reset button 41, and the normally closed contact 44 is connected in series with the normally closed contact of the ring main unit's water pump stop button 42. This design enables the local reset operation on the floating vessel 1 to be linked with the original reset and stop buttons of the ring main unit 4, without affecting the original button functions. It also allows for local intervention in the original control logic through the first relay 5. This achieves compatibility between local reset and the original control buttons of the ring main unit 4. When operators operate the control box 3 on the floating vessel 1, it is equivalent to performing reset and stop operations on the ring main unit 4, ensuring operational flexibility and coordination with the original system.
[0037] Furthermore, the second relay 6 includes a normally closed contact 61 and a normally open contact 62. The normally closed contact 61 is connected in series in the control circuit of the AC contactor 8, and the normally open contact 62 is connected in series with the time relay 7 and then in parallel with the normally open contact of the local reset button 31 to form a self-locking circuit for the reset operation.
[0038] The second relay 6 includes a normally closed contact 61 and a normally open contact 62. The normally closed contact 61 is connected in series in the control circuit of the AC contactor 8. The normally open contact 62 is connected in series with the time relay 7 and then in parallel to the normally open contact of the local reset button 31 on the control box 3 of the floating vessel 1, forming a self-locking circuit for the reset operation. When the local reset button 31 is pressed, the second relay 6 is energized, and its normally open contact 62 closes to achieve self-locking, ensuring the reset process continues. At the same time, its normally closed contact 61 opens, de-energizing the AC contactor 8 and cutting off the control power supply of the high-voltage soft starter. The self-locking circuit ensures that the reset operation is carried out stably within the set time, avoiding reset interruption due to accidental release of the local reset button 31 at the control box 3 of the floating vessel 1. The action of the normally closed contact 61 of the second relay 6 effectively controls the control power supply of the high-voltage soft starter, creating conditions for clearing fault records.
[0039] Furthermore, the time relay 7 is set to a delay time of 30 seconds. The time-delay disconnect contact 71 of the time relay 7 is connected in series in the main circuit of the reset control circuit to control the duration of the reset operation. The reset control circuit is de-energized after the time relay 7 finishes timing. The normally open contact needs to be closed again by pressing the local reset button 31 to restore power to the circuit. The time-delay disconnect contact 71 of the time relay 7 opens after the timing ends and automatically resets to the closed state after the reset control circuit is de-energized, preparing for the next reset operation.
[0040] The time relay 7 is set to a delay time of 30 seconds, and its delay-off contact 71 is connected in series in the main circuit of the reset control circuit. After the timer expires, the delay-off contact 71 opens, the reset control circuit is de-energized, and components such as the first relay 5 and the second relay 6 return to their initial states. The delay-off contact 71 automatically resets to the closed state after the circuit is de-energized. If a reset is required again, the local reset button 31 on the control box 3 of the floating vessel 1 must be pressed again. The 30-second delay setting ensures sufficient time for the reset operation to complete tasks such as clearing fault records; after the circuit is de-energized, all components return to their initial states, preparing for the next reset, and the local reset button 31 on the control box 3 of the floating vessel 1 must be pressed again to reset again, avoiding unnecessary resets due to misoperation and improving operational safety and reliability.
[0041] Furthermore, the straight-line distance between the floating vessel 1 and the ring network cabinet 4 is not less than 600 meters.
[0042] It is clearly stipulated that the straight-line distance between the floating vessel 1 and the ring main unit 4 is no less than 600 meters. At this distance, the original method of operators traveling back and forth between the two locations for reset operations is time-consuming and inconvenient, highlighting the necessity of installing a local reset device on the floating vessel 1. For scenarios involving a long distance between the floating vessel 1 and the ring main unit 4, the advantages of this local reset device are fully demonstrated, significantly reducing the time and physical exertion of operators traveling between the two locations, reducing the safety risks associated with long-distance operations, and better showcasing its efficient and safe characteristics in long-distance working conditions.
[0043] When using the high-pressure multistage pump local reset device of this utility model, firstly, when the high-pressure multistage pump needs to be reset due to abnormal shutdown such as power outage or power fluctuation, the operator presses the local reset button 31 at the control box 3 of the floating vessel 1. Its normally open contact closes, connecting the AC220V power supply L terminal to the control circuit. The control signal passes through a 2x2.5mm... 2 The two-core control cable transmits power to ring main unit 4, and the coils of the first relay 5, the second relay 6, and the time relay 7 are energized simultaneously.
[0044] After the second relay 6 is energized, its normally open contact 62 and the time relay 7 form a self-locking circuit that closes. Even if the operator releases the local reset button 31, the reset control circuit can still be kept on to ensure that the reset process is not interrupted.
[0045] After the first relay 5 is energized, its normally open contact 43 is connected in parallel with the normally open contact of the ring main unit water pump reset button 41, which is equivalent to performing a reset operation in the ring main unit 4 to clear the fault record of the microcomputer integrated controller; at the same time, the normally closed contact 44 of the first relay is disconnected in series with the normally closed contact of the ring main unit water pump stop button 42, temporarily cutting off the original start control circuit to avoid accidental start during the reset process.
[0046] When the second relay 6 is energized, its normally closed contact 61 opens, causing the AC contactor 8 to lose power. Since the main contacts of the AC contactor 8 are connected in parallel with the circuit breaker in the ring main unit 4, the AC220V control power supply of the high-voltage soft starter is cut off, thus clearing the fault record of the high-voltage soft starter.
[0047] After the time relay 7 is energized, it starts a 30-second countdown. After the countdown ends, its delayed disconnect contact 71 opens, and the entire reset control circuit is de-energized.
[0048] When the coils of the first relay 5 and the second relay 6 are de-energized, all contacts return to their initial state: normally open contacts open and normally closed contacts close, and the self-locking circuit is released.
[0049] When contactor 8 is energized, its main contacts close, restoring the AC220V power supply to the high-voltage soft starter control circuit.
[0050] The time-delay disconnect contact 71 of the time relay 7 automatically resets to the closed state after the circuit loses power, preparing for the next reset operation. If the first reset is unsuccessful or a second reset is required, the operator only needs to press the local reset button 31 on the control box 3 of the floating vessel 1 again to repeat the above process and trigger the reset operation again. Through the above process, in scenarios where the distance between the floating vessel 1 and the ring main unit 4 is not less than 600 meters, this device can complete the rapid reset of the high-pressure multi-stage pump without requiring personnel to travel between the two locations, greatly improving operational efficiency and safety.
[0051] Finally, it should be noted that the electronic components in the high-pressure multistage pump 2, control box 3, etc. in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.
[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A local reset device for a high-pressure multistage pump, characterized in that: The system includes a local reset button (31) in the control box (3) of the floating vessel (1), a control cable connecting the control box (3) and the ring main unit (4), and a reset control circuit installed in the ring main unit (4). The reset control circuit includes a first relay (5), a second relay (6), a time relay (7), and an AC contactor (8). The main contacts of the AC contactor (8) are connected in parallel with the circuit breaker in the ring main unit (4) to replace the circuit breaker in providing AC220V power to the high-voltage soft starter control circuit.
2. The high-pressure multistage pump local reset device according to claim 1, characterized in that: The control cable is connected at one end to the local reset button (31) and at the other end to the wiring terminal of the ring main unit (4).
3. The high-pressure multistage pump local reset device according to claim 1, characterized in that: The control circuit of the local reset button (31) is configured as follows: the L end of the AC220V power supply is connected to the input ends of the first relay (5), the second relay (6), and the time relay (7) respectively through the normally open contact of the local reset button (31), and the output ends of each coil are connected to the N end of the power supply to form a closed loop.
4. The high-pressure multistage pump local reset device according to claim 3, characterized in that: The first relay (5) includes a first relay normally open contact (43) and a first relay normally closed contact (44). The contact configuration is as follows: the first relay normally open contact (43) is connected in parallel with the normally open contact of the ring main unit water pump reset button (41), and the first relay normally closed contact (44) is connected in series with the normally closed contact of the ring main unit water pump stop button (42).
5. The high-pressure multistage pump local reset device according to claim 1, characterized in that: The second relay (6) includes a normally closed contact (61) and a normally open contact (62). The normally closed contact (61) is connected in series in the control circuit of the AC contactor (8). The normally open contact (62) is connected in series with the time relay (7) and then in parallel with the normally open contact of the local reset button (31) to form a self-locking circuit for the reset operation.
6. The high-pressure multistage pump local reset device according to claim 5, characterized in that: The delayed disconnect contact (71) of the time relay (7) is connected in series in the main circuit of the reset control circuit to control the duration of the reset operation. The reset control circuit is de-energized after the time relay (7) finishes timing. The normally open contact needs to be closed again by pressing the local reset button (31) to restore power to the circuit. The delayed disconnect contact (71) of the time relay (7) is disconnected after timing ends and automatically resets to the closed state after the reset control circuit is de-energized, in preparation for the next reset operation.
7. The high-pressure multistage pump local reset device according to claim 1, characterized in that: The straight-line distance between the floating vessel (1) and the ring network cabinet (4) is not less than 600 meters.