One-pump standby circulating water pump system
By introducing a drain pipe into the circulating water pump system, the problem of difficult maintenance caused by internal leakage of valves was solved, enabling maintenance without shutting down the system, thus improving equipment safety and ease of maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LUBAN TECH (SHANXI) CO LTD
- Filing Date
- 2025-10-09
- Publication Date
- 2026-08-04
AI Technical Summary
The existing one-in-one-out-of-service circulating water pump system requires the main pipeline water supply system to be shut down for inspection and maintenance when there is internal leakage in the valve. This leads to the shutdown of the production line, causing economic losses, as well as water waste and difficulty in equipment observation.
A drain pipe is introduced into the circulating water pump system, and the internal leakage water is diverted to another branch pipe through the drain valve, so as to avoid water accumulation in the pump to be repaired and realize maintenance without shutting down the system.
This technology enables the system to operate without shutting down in the event of internal valve leakage, improving equipment safety, facilitating maintenance, and reducing water waste and economic losses.
Smart Images
Figure CN224592285U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a one-in-one-standby circulating water pump system, belonging to the technical field of one-in-one-standby circulating water pump system modification. Background Technology
[0002] A one-in-one-standby water pump system refers to the use of two water pumps in a water supply system: one as the main pump and one as a standby pump. The principle is as follows: Under normal circumstances, the main pump operates, providing water to the system. If the main pump fails or requires maintenance, the standby pump automatically starts, taking over the main pump's work and ensuring the continuous operation of the water supply system. This system provides a continuous water supply and is therefore widely used in many fields requiring stable water supply, such as power, petroleum, metallurgy, and chemical industries. Existing one-in-one-standby circulating water pump systems include... Figure 3 As shown, the system includes a main pipe 1, with a first branch port 2 and a second branch port 7. A first branch pipe 3 is connected to the first branch port 2, and a first inlet valve 4, a first circulating water pump 5, and a first outlet valve 6 are sequentially connected to the first branch pipe 3. A second branch pipe 8 is connected to the second branch port 7, and a second inlet valve 9, a second circulating water pump 10, and a second outlet valve 11 are sequentially connected to the second branch pipe 8. Under normal circumstances, the circulating water pumps can be switched for maintenance by opening and closing the inlet and outlet valves. However, with prolonged system operation, internal leakage of valves frequently occurs. This causes leaked water to enter the circulating water pump awaiting maintenance. When the pump cover is opened for maintenance, water overflows, wasting water resources and creating a muddy environment. Furthermore, because the pump body is filled with water, it is impossible to observe the damage to the components inside the pump, thus preventing maintenance. Therefore, when a valve leaks internally, the main water supply system must be shut down, and the leaking valve replaced before the circulating water pump can be inspected and maintained. Shutting down the main water supply system will undoubtedly lead to production line closure, causing significant economic losses to the company. Utility Model Content
[0003] Based on the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a circulating water pump system that allows for maintenance and repair of circulating water pumps even under conditions of valve leakage without shutting down the main pipeline water supply system.
[0004] The one-use-one-standby circulating water pump system of this utility model includes a main pipeline with a first branch port and a second branch port. A first branch pipe is connected to the first branch port, and a first inlet valve, a first circulating water pump, and a first outlet valve are sequentially connected to the first branch pipe. A second branch pipe is connected to the second branch port, and a second inlet valve, a second circulating water pump, and a second outlet valve are sequentially connected to the second branch pipe. A first drain pipe and a second drain pipe are connected between the first branch pipe and the second branch pipe. One end of the first drain pipe is located between the first circulating water pump and the first outlet valve, and the other end is located between the second inlet valve and the second circulating water pump. A first drain valve is connected to the first drain pipe. One end of the second drain pipe is located between the first inlet valve and the first circulating water pump, and the other end is located between the second circulating water pump and the second outlet valve. A second drain valve is connected to the second drain pipe.
[0005] Furthermore, a first drain port is connected to the first branch pipe between the first circulating water pump and the first outlet valve, and a first return port is connected to the second branch pipe between the second inlet valve and the second circulating water pump. The two ends of the first drain pipe are detachably and sealed to the first drain port and the first return port, respectively.
[0006] Furthermore, both the first drain outlet and the first return outlet are connected to the first drain pipe via flanges.
[0007] Furthermore, a second drain port is connected to the second branch pipe between the second circulating water pump and the second outlet valve, and a second return port is connected to the first branch pipe between the first inlet valve and the first circulating water pump. The two ends of the second drain pipe are detachably and sealed to the second drain port and the second return port, respectively.
[0008] Furthermore, both the second drain outlet and the second return outlet are connected to the second drain pipe via flanges.
[0009] The advantages of this utility model compared with the prior art are: The one-use-one-standby circulating water pump system of this utility model is equipped with a drain pipe, which can divert leaked water to another branch pipe for transportation, thereby preventing leaked water from accumulating in the circulating water pump that needs to be repaired and maintained. This not only improves the operational safety of the equipment, but also facilitates the repair and maintenance of the circulating water pump. Attached Figure Description
[0010] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 3 This is a schematic diagram of an existing circulating water pump system with one pump in use and one on standby.
[0011] In the diagram: 1. Main pipe; 2. First branch outlet; 3. First branch pipe; 4. First inlet valve; 5. First circulating water pump; 6. First outlet valve; 7. Second branch outlet; 8. Second branch pipe; 9. Second inlet valve; 10. Second circulating water pump; 11. Second outlet valve; 12. Second drain valve; 13. Second drain pipe; 14. First drain valve; 15. First drain pipe; 16. First drain outlet; 17. Second drain outlet; 18. First return outlet; 19. Second return outlet. Detailed Implementation
[0012] The embodiments of this utility model will be further described below with reference to the accompanying drawings: Example 1: like Figure 1 As shown, the one-in-use, one-standby circulating water pump system of this utility model includes a main pipe 1, with a first branch port 2 and a second branch port 7 on the main pipe 1. A first branch pipe 3 is connected to the first branch port 2, and a first inlet valve 4, a first circulating water pump 5, and a first outlet valve 6 are sequentially connected to the first branch pipe 3. A second branch pipe 8 is connected to the second branch port 7, and a second inlet valve 9, a second circulating water pump 10, and a second outlet valve 11 are sequentially connected to the second branch pipe 8. A first drain pipe connects the first branch pipe 3 and the second branch pipe 8. The first drain pipe 15 is connected to the second drain pipe 13. One end of the first drain pipe 15 is located between the first circulating water pump 5 and the first outlet valve 6. The other end of the first drain pipe 15 is located between the second inlet valve 9 and the second circulating water pump 10. The first drain pipe 15 is connected to the first drain valve 14. One end of the second drain pipe 13 is located between the first inlet valve 4 and the first circulating water pump 5. The other end of the second drain pipe 13 is located between the second circulating water pump 10 and the second outlet valve 11. The second drain pipe 13 is connected to the second drain valve 12.
[0013] During the modification, if the first branch pipe 3 is out of service and the second branch pipe 8 is in operation, process holes can be first opened between the first inlet valve 4 and the first circulating water pump 5, and between the first circulating water pump 5 (since the first branch pipe 3 is out of service, the first inlet valve 4 and the first outlet valve 6 are both closed, so water will not flow out from the process holes). Then, the second drain pipe 13 and the first drain pipe 15 are welded to the corresponding two process holes. Then, the second drain valve 12 and the first drain valve 14 are connected to the second drain pipe 13 and the first drain pipe 15, respectively. Then, the second drain valve 12 and the first drain valve 14 are kept closed, and the first branch pipe 3 is then in operation while the second branch pipe 8 is out of service. Since the second drain valve 12 and the first drain valve 14 are both closed at this time, the water will not flow out through the second drain pipe 13 and the first drain pipe 15. Then, process holes are made between the second inlet valve 9 and the second circulating water pump 10 and between the second circulating water pump 10 and the second outlet valve 11 (since the second branch pipe 8 is not in operation, the second inlet valve 9 and the second outlet valve 11 are both closed, so the water will not flow out from the process holes). Then, the first drain pipe 15 and the second drain pipe 13 are welded to the corresponding two process holes, and the ports of the first drain pipe 15 and the second drain pipe 13 are sealed and connected to the first drain valve 14 and the second drain valve 12, respectively, thereby completing the system modification.
[0014] Taking the operation of the second branch pipeline 8 and the shutdown and maintenance of the first branch pipeline 3 as an example, At this time, the first drain valve 14 is opened and the second drain valve 12 is closed. Since the second drain valve 12 is closed, the water pumped out by the second circulating water pump 10 will not enter the second drain pipe 13, ensuring smooth water delivery. When there is internal leakage in the first inlet valve 4 and / or the first outlet valve 6, since the first drain valve 14 is open, the water that leaks into the first circulating water pump 5 will enter the second branch pipe 8 through the first drain pipe 15 and be pumped out by the second circulating water pump 10. This ensures that the water level in the first circulating water pump 5 is always kept in a safe area below the sealing surface, which facilitates the opening, inspection and maintenance of the first circulating water pump 5.
[0015] Example 2: like Figure 2 As shown, based on Example 1, Furthermore, a first drain port 16 is connected to the first branch pipe 3 between the first circulating water pump 5 and the first outlet valve 6, and a first return port 18 is connected to the second branch pipe 8 between the second inlet valve 9 and the second circulating water pump 10. The two ends of the first drain pipe 15 are detachably and sealingly connected to the first drain port 16 and the first return port 18, respectively. The first drain pipe 15 can be disassembled for easy replacement and maintenance.
[0016] Furthermore, the first drain outlet 16 and the first return outlet 18 are both connected to the first drain pipe 15 via flanges, which facilitates installation and disassembly and provides good sealing.
[0017] Furthermore, a second drain port 17 is connected to the second branch pipe 8 between the second circulating water pump 10 and the second outlet valve 11, and a second return port 19 is connected to the first branch pipe 3 between the first inlet valve 4 and the first circulating water pump 5. The two ends of the second drain pipe 13 are detachably and sealingly connected to the second drain port 17 and the second return port 19, respectively. The second drain pipe 13 can be disassembled for easy replacement and maintenance.
[0018] Furthermore, the second drain outlet 17 and the second return outlet 19 are both connected to the second drain pipe 13 by flanges, which makes installation and disassembly convenient and provides good sealing.
Claims
1. A circulating water pump system with one operating and one standby pump, comprising a main pipe (1), a first branch port (2) and a second branch port (7) on the main pipe (1), a first branch pipe (3) connected to the first branch port (2), a first inlet valve (4), a first circulating water pump (5) and a first outlet valve (6) sequentially connected to the first branch pipe (3), a second branch pipe (8) connected to the second branch port (7), a second inlet valve (9), a second circulating water pump (10) and a second outlet valve (11) sequentially connected to the second branch pipe (8), characterized in that: A first drain pipe (15) and a second drain pipe (13) are connected between the first branch pipe (3) and the second branch pipe (8). One end of the first drain pipe (15) is located between the first circulating water pump (5) and the first outlet valve (6). The other end of the first drain pipe (15) is located between the second inlet valve (9) and the second circulating water pump (10). A first drain valve (14) is connected to the first drain pipe (15). One end of the second drain pipe (13) is located between the first inlet valve (4) and the first circulating water pump (5). The other end of the second drain pipe (13) is located between the second circulating water pump (10) and the second outlet valve (11). A second drain valve (12) is connected to the second drain pipe (13).
2. The circulating water pump system with one working pump and one standby pump according to claim 1, characterized in that: A first drain port (16) is connected to the first branch pipe (3) between the first circulating water pump (5) and the first outlet valve (6), and a first return port (18) is connected to the second branch pipe (8) between the second inlet valve (9) and the second circulating water pump (10). The two ends of the first drain pipe (15) are detachably and sealed to the first drain port (16) and the first return port (18) respectively.
3. The circulating water pump system with one working pump and one standby pump according to claim 2, characterized in that: The first drain outlet (16) and the first return outlet (18) are both connected to the first drain pipe (15) by flanges.
4. The circulating water pump system with one working pump and one standby pump according to any one of claims 1 to 3, characterized in that: A second drain port (17) is connected to the second branch pipe (8) between the second circulating water pump (10) and the second outlet valve (11). A second return port (19) is connected to the first branch pipe (3) between the first inlet valve (4) and the first circulating water pump (5). The two ends of the second drain pipe (13) are detachably and sealed to the second drain port (17) and the second return port (19) respectively.
5. The circulating water pump system with one working pump and one standby pump according to claim 4, characterized in that: The second drain outlet (17) and the second return outlet (19) are all connected to the second drain pipe (13) by flanges.