Centrifugal pump mechanical seal cooling water filtering device
By designing a cooling water filter device for mechanical sealing of centrifugal pumps, the leakage and overheating problems caused by blockage of sludge impurities in the cooling water are solved, and the normal operation and maintenance of mechanical seals are simplified, which reduces production costs and increases the Product pass rate.
Patent Information
- Application Number
- CN202421149419.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The mechanical seal of the centrifugal pump is blocked by the sludge impurities in the cooling water, resulting in leakage and overheating and burning. The maintenance methods of the prior art have a long time, which increases production costs and unqualification rates.
A mechanically sealed cooling water filter device of centrifugal pump is designed, including the main water supply pipeline, the main return pipeline, the cooling water input pipeline and the output pipeline. The effective filtration of cooling water is achieved through the combination of the shut-off valve and the Y-type filter to ensure that The circulation channel is smooth.
It effectively filters impurities in the cooling water to prevent blockage, ensures the normal operation of mechanical seals, simplifies the maintenance process, reduces production costs, and improves the product qualification rate.
Smart Images
Figure CN222510745U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water cooling of mechanical seals of centrifugal pumps, in particular to a cooling water filtering device for the mechanical seals of centrifugal pumps. Background Art
[0002] The mechanical seal of a centrifugal pump is mainly composed of a base, a sliding ring and a clamping device. The base is installed on the pump body; the sliding ring is generally a circle with a rectangular cross-section. The sliding ring is combined with the seal and installed on the pump shaft. The seal is generally made of carbon, such as graphite, and other wear-resistant and sealing materials; the clamping device mainly generates pressure and can be a spring or other means.
[0003] After the sliding ring is installed on the pump shaft, it rotates together with the pump shaft. The fitting part is in static contact with good sealing performance. The sliding ring is tightly pressed against the base by the pressure of the clamping device. The sliding ring rotates on the base, and a dynamic seal is formed between the sliding ring and the base. Because carbon materials such as graphite have small molecules, low mass density, good sealing performance, and have the function of increasing lubricity, complete sealing can be achieved during the rotation process. Because the medium temperature is too high, cooling water is required to reduce the operating temperature and extend the service life.
[0004] However, in some usage scenarios, the cooling water contains a large amount of sludge impurities, and there is a problem that the mechanical seal of the centrifugal pump is blocked by the sludge impurities in the cooling water, which destroys the cooling water circulation and causes the mechanical seal to overheat and burn and leak.
[0005] The existing method for cooling water blockage of the mechanical seal of a centrifugal pump is to stop the pump for maintenance, unclog the cooling water circulation channel or replace the mechanical seal of the centrifugal pump. The maintenance method of the existing technology takes too long to maintain, resulting in subsequent processes to circulate due to lack of raw materials, resulting in unqualified finished product quality, increasing production costs, and being time-consuming and labor-intensive. Utility Model Content
[0006] The utility model aims to provide a centrifugal pump mechanical seal cooling water filtering device, which can effectively filter the impurities in the centrifugal pump mechanical seal cooling water, thereby ensuring the normal operation of the centrifugal pump and convenient maintenance.
[0007] To achieve the above-mentioned technical effect, the utility model provides a cooling water filtration device for a centrifugal pump mechanical seal, comprising a main water supply pipeline and a main return water pipeline, wherein a cooling water input pipe is connected to the main water supply pipeline, a cooling water output pipe is connected to the main return water pipeline, an end of the cooling water output pipe away from the main return water pipeline is connected to the cooling water outlet of the centrifugal pump mechanical seal, a cooling water supply pipeline is connected between the cooling water input pipe and the cooling water inlet of the centrifugal pump mechanical seal, a stop valve II, a Y-type filter I and a stop valve III are connected to the cooling water supply pipeline, and along the direction from the cooling water input pipe to the cooling water inlet of the centrifugal pump mechanical seal, the order of the stop valve II, the Y-type filter I and the stop valve III is the stop valve II, the Y-type filter I and the stop valve III.
[0008] Furthermore, a cooling water standby pipeline is connected between the cooling water inlet pipe and the cooling water inlet of the mechanical seal of the centrifugal pump. The cooling water standby pipeline is connected in parallel with the cooling water supply pipeline. The cooling water standby pipeline is connected with a stop valve IV, a Y-type filter II and a stop valve V. Along the direction from the cooling water inlet pipe to the cooling water inlet of the mechanical seal of the centrifugal pump, the order of the stop valve IV, the Y-type filter II and the stop valve V is the stop valve IV, the Y-type filter II and the stop valve V.
[0009] Furthermore, the cooling water input pipe is connected with a stop valve I.
[0010] Furthermore, it includes a differential pressure transmitter I, the high-pressure interface of the differential pressure transmitter I is connected to a high-pressure side conduit I, the low-pressure interface of the differential pressure transmitter I is connected to a low-pressure side conduit I, the end of the high-pressure side conduit I away from the differential pressure transmitter I is connected to the pipeline between the stop valve II and the Y-type filter I, and the end of the low-pressure side conduit I away from the differential pressure transmitter I is connected to the pipeline between the Y-type filter I and the stop valve III.
[0011] Furthermore, it includes a differential pressure transmitter II, the high-pressure interface of the differential pressure transmitter II is connected to a high-pressure side conduit II, the low-pressure interface of the differential pressure transmitter II is connected to a low-pressure side conduit II, the end of the high-pressure side conduit II away from the differential pressure transmitter II is connected to the pipeline between the stop valve IV and the Y-type filter II, and the end of the low-pressure side conduit II away from the differential pressure transmitter II is connected to the pipeline between the Y-type filter II and the stop valve V.
[0012] The beneficial effects of the utility model are as follows: it includes a main water supply pipeline and a main return water pipeline, the main water supply pipeline is connected with a cooling water input pipe, the main return water pipeline is connected with a cooling water output pipe, one end of the cooling water output pipe away from the main return water pipeline is connected to the cooling water outlet of the mechanical seal of the centrifugal pump, a cooling water supply pipeline is connected between the cooling water input pipe and the cooling water inlet of the mechanical seal of the centrifugal pump, a stop valve II, a Y-type filter I and a stop valve III are connected to the cooling water supply pipeline, and the order of the stop valve II, the Y-type filter I and the stop valve III from the cooling water input pipe to the cooling water inlet of the mechanical seal of the centrifugal pump is the stop valve II, the Y-type filter I and the stop valve III. The device of the utility model has low cost, simple installation and operation, reliable use and convenient maintenance, and well solves the leakage problem of the mechanical seal of the centrifugal pump caused by the clogging of the circulation channel by sludge impurities in the cooling water, which not only ensures the stable transportation of the cooling medium, but also ensures the qualified rate of the process products. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the utility model;
[0014] In the figure: 1. Main water supply pipeline; 2. Main return water pipeline; 3. Cooling water supply pipeline; 4. Cooling water standby pipeline; 5. Stop valve I; 6. Stop valve II; 7. Y-type filter I; 8. Stop valve III; 9. Stop valve IV; 10. Y-type filter II; 11. Stop valve V; 12. Differential pressure transmitter I; 13. High-pressure side conduit I; 14. Low-pressure side conduit I; 15. Differential pressure transmitter II; 16. High-pressure side conduit II; 17. Low-pressure side conduit II; 18. Cooling water output pipe; 19. Cooling water input pipe. DETAILED DESCRIPTION
[0015] like Figure 1As shown, the utility model is a centrifugal pump mechanical seal cooling water filtering device comprising a main water supply pipeline 1 and a main return water pipeline 2, the main water supply pipeline 1 is connected to a cooling water input pipe 19, the cooling water input pipe 19 is connected to a stop valve Ⅰ5, the main return water pipeline 2 is connected to a cooling water output pipe 18, the end of the cooling water output pipe 18 away from the main return water pipeline 2 is connected to the centrifugal pump mechanical seal cooling water outlet, the cooling water input pipe 19 and the centrifugal pump mechanical seal cooling water inlet are connected to a cooling water supply pipeline 3 and a cooling water standby pipeline 4, the cooling water supply pipeline 3 and the cooling water standby pipeline 4 are connected in parallel with each other; the cooling water supply pipeline 3 is connected to a stop valve Ⅱ6, a Y-type filter Ⅰ7 and a stop valve Ⅲ8 , along the direction of the cooling water inlet pipe 19 to the cooling water inlet of the mechanical seal of the centrifugal pump, the order of the stop valve Ⅱ6, the Y-type filter Ⅰ7 and the stop valve Ⅲ8 is the stop valve Ⅱ6, the Y-type filter Ⅰ7 and the stop valve Ⅲ8; a cooling water standby pipeline 4 is connected between the cooling water inlet pipe 19 and the cooling water inlet of the mechanical seal of the centrifugal pump, the cooling water standby pipeline 4 is connected to the cooling water supply pipeline 3 in parallel, and the cooling water standby pipeline 4 is connected to the stop valve Ⅳ9, the Y-type filter Ⅱ10 and the stop valve Ⅴ11, along the direction of the cooling water inlet pipe 19 to the cooling water inlet of the mechanical seal of the centrifugal pump, the order of the stop valve Ⅳ9, the Y-type filter Ⅱ10 and the stop valve Ⅴ11 is the stop valve Ⅳ9, the Y-type filter Ⅱ10 and the stop valve Ⅴ11.
[0016] It includes a differential pressure transmitter Ⅰ12, the high-pressure interface of the differential pressure transmitter Ⅰ12 is connected to a high-pressure side conduit Ⅰ13, the low-pressure interface of the differential pressure transmitter Ⅰ12 is connected to a low-pressure side conduit Ⅰ14, the end of the high-pressure side conduit Ⅰ13 away from the differential pressure transmitter Ⅰ12 is connected to the pipeline between the stop valve Ⅱ6 and the Y-type filter Ⅰ7, and the end of the low-pressure side conduit Ⅰ14 away from the differential pressure transmitter Ⅰ12 is connected to the pipeline between the Y-type filter Ⅰ7 and the stop valve Ⅲ8.
[0017] It includes a differential pressure transmitter Ⅱ15, the high-pressure interface of the differential pressure transmitter Ⅱ15 is connected to a high-pressure side conduit Ⅱ16, the low-pressure interface of the differential pressure transmitter Ⅱ15 is connected to a low-pressure side conduit Ⅱ17, the end of the high-pressure side conduit Ⅱ16 away from the differential pressure transmitter Ⅱ15 is connected to the pipeline between the stop valve Ⅳ9 and the Y-type filter Ⅱ10, and the end of the low-pressure side conduit Ⅱ17 away from the differential pressure transmitter Ⅱ15 is connected to the pipeline between the Y-type filter Ⅱ10 and the stop valve Ⅴ11.
[0018] The stop valve Ⅰ5 is used to control the on-off of the cooling water input pipe 19. The cooling water supply pipeline 3 and the cooling water standby pipeline 4 are backed up to each other to prevent switching to another pipeline when one channel is blocked, thereby avoiding the equipment shutdown caused by the shutdown of the centrifugal pump. The Y-type filter Ⅰ7 and the Y-type filter Ⅱ10 are used to filter impurities in the cooling water to ensure the normal operation of the centrifugal pump. During maintenance, the filter screens in the Y-type filter Ⅰ7 and the Y-type filter Ⅱ10 can be removed for cleaning or replacement.
[0019] Differential pressure transmitter Ⅰ12 and differential pressure transmitter Ⅱ15 are used to detect the blockage of Y-type filter Ⅰ7 and Y-type filter Ⅱ10. If the pressure difference on both sides of Y-type filter Ⅰ7 and Y-type filter Ⅱ10 is too large, it means that the filter screen of Y-type filter Ⅰ7 and Y-type filter Ⅱ10 is blocked by impurities.
[0020] Differential pressure transmitter Ⅰ12 and differential pressure transmitter Ⅱ15 are generally used with an accuracy of 0.5.
[0021] In actual use, the signals of differential pressure transmitter Ⅰ12 and differential pressure transmitter Ⅱ15 can also be input into DCS to remind the central control operator conveniently. When the differential pressure is too large, an alarm will be issued so that the trapezoidal staff can replace the filter element in time. The service life of the main line Y-type filter element can also be recorded through the differential pressure value history curve, so as to purchase the main line Y-type filter element spare parts in advance.
[0022] The utility model discloses a device with low cost, simple installation and operation, reliable use and convenient maintenance, and well solves the leakage problem of centrifugal pump mechanical seal caused by sludge impurities in cooling water blocking the circulation channel, which not only ensures the stable delivery of cooling medium, but also ensures the qualified rate of process products.
Claims
1. A centrifugal pump mechanical seal cooling water filter device, characterized in that: The invention comprises a main water supply pipeline (1) and a main water return pipeline (2), wherein the main water supply pipeline (1) is connected to a cooling water input pipeline (19), the main water return pipeline (2) is connected to a cooling water output pipeline (18), one end of the cooling water output pipeline (18) away from the main water return pipeline (2) is connected to a cooling water outlet of a centrifugal pump mechanical seal, a cooling water supply pipeline (3) is connected between the cooling water input pipeline (19) and a cooling water inlet of the centrifugal pump mechanical seal, a stop valve II (6), a Y-type filter I (7) and a stop valve III (8) are connected to the cooling water supply pipeline (3), and in the direction from the cooling water input pipeline (19) to the cooling water inlet of the centrifugal pump mechanical seal, the stop valve II (6), the Y-type filter I (7) and the stop valve III (8) are arranged in the order of stop valve II (6), Y-type filter I (7) and stop valve III (8).
2. A centrifugal pump mechanical seal cooling water filter device according to claim 1, characterized in that: A cooling water standby pipeline (4) is connected between the cooling water inlet pipe (19) and the cooling water inlet of the mechanical seal of the centrifugal pump. The cooling water standby pipeline (4) is connected in parallel with the cooling water supply pipeline (3). The cooling water standby pipeline (4) is connected with a stop valve IV (9), a Y-type filter II (10) and a stop valve V (11). In the direction from the cooling water inlet pipe (19) to the cooling water inlet of the mechanical seal of the centrifugal pump, the stop valve IV (9), the Y-type filter II (10) and the stop valve V (11) are arranged in the order of the stop valve IV (9), the Y-type filter II (10) and the stop valve V (11).
3. A centrifugal pump mechanical seal cooling water filter device according to claim 2, characterized in that: The cooling water inlet pipe (19) is connected to a stop valve I (5).
4. A centrifugal pump mechanical seal cooling water filter device according to claim 3, characterized in that: The invention comprises a differential pressure transmitter I (12), wherein a high-pressure side conduit I (13) is connected to the high-pressure interface of the differential pressure transmitter I (12), a low-pressure side conduit I (14) is connected to the low-pressure interface of the differential pressure transmitter I (12), an end of the high-pressure side conduit I (13) away from the differential pressure transmitter I (12) is connected to the pipeline between the stop valve II (6) and the Y-type filter I (7), and an end of the low-pressure side conduit I (14) away from the differential pressure transmitter I (12) is connected to the pipeline between the Y-type filter I (7) and the stop valve III (8).
5. A centrifugal pump mechanical seal cooling water filter device according to claim 4, characterized in that: The invention comprises a differential pressure transmitter II (15), wherein a high-pressure side conduit II (16) is connected to the high-pressure interface of the differential pressure transmitter II (15), and a low-pressure side conduit II (17) is connected to the low-pressure interface of the differential pressure transmitter II (15), wherein an end of the high-pressure side conduit II (16) away from the differential pressure transmitter II (15) is connected to a pipeline between a stop valve IV (9) and a Y-type filter II (10), and an end of the low-pressure side conduit II (17) away from the differential pressure transmitter II (15) is connected to a pipeline between a Y-type filter II (10) and a stop valve V (11).