A centrifugal pump protection type bottom scale sheet filter collector

Abstract

The utility model discloses a centrifugal pump protection type tower bottom scale piece filter collector, including the reversing valve, the reversing valve includes the casing, the casing inside swing joint has the valve body, the valve body inside is established with T shape water channel, the port of T shape water channel crossbeam one end is fixed with the filter screen, the casing lateral wall is established with three water mouths respectively, the three water mouths of casing are connected with inlet pipe, branch pipe, cut -off pipe respectively, cut -off pipe one end connects the casing water mouth, cut -off pipe other end is connected with the outlet tube, the water mouth of branch pipe one end connects the casing, branch pipe other end connects the outlet tube pipe body, cut -off pipe pipe body inside is fixed with cut -off filter screen, through the cooperation of valve body switching and control valve of reversing valve, can complete the switching of filter state and backwashing state in the system normal operation process, need not interrupt the work flow of centrifugal pump, solved the problem that traditional filter device needs to stop and maintain, significantly promoted the system operation continuity.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal pump technology, specifically relating to a protective scale collector for the bottom of a centrifugal pump. Background Technology

[0002] Centrifugal pumps, as core equipment for industrial fluid transportation, are widely used in tower and bottom systems in petrochemical, water treatment, and other fields. However, the medium at the bottom of such systems often contains high concentrations of calcium and magnesium ions, particulate impurities, and other components that are prone to scaling. During long-term operation, these components easily form a hard scale layer in the internal flow channels and mechanical seal area of ​​the pump body, leading to a significant decrease in pump efficiency, increased energy consumption, and frequent failure of the mechanical seal, which seriously restricts the service life of the equipment and the stability of the system.

[0003] Currently, commonly used protection methods have many limitations: First, although mechanical filtration devices can intercept some impurities, their structure is complex, maintenance costs are high, and their effect on micron-sized particles is insufficient, making it difficult to eliminate the root cause of scale buildup; Second, although self-cleaning filters can achieve non-stop operation, they rely on external power or media backwashing, resulting in significant additional energy consumption, and their filtration accuracy is often limited, making it difficult to cope with high hardness and easily caking conditions; In addition, although adding chemical scale inhibitors can delay scaling to some extent, they have problems such as high environmental risks, easy alteration of media properties, and limited applicable scenarios, and are not a fundamental solution.

[0004] Therefore, existing technologies cannot achieve precise filtration and collection of scale economically, efficiently, and environmentally friendly without interrupting the process. There is an urgent need for an online collection device with a reasonable structure, simple maintenance, no external power required, and high filtration accuracy to improve the reliability and economy of centrifugal pump operation. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a centrifugal pump protective tower bottom scale filter collector, comprising a reversing valve, the reversing valve comprising a housing, a valve body movably connected inside the housing, a T-shaped water channel opened inside the valve body, a filter screen fixed at one end of the crossbeam of the T-shaped water channel, three water inlets respectively opened on the side wall of the housing, an inlet pipe, a branch pipe and a intercepting pipe respectively connected to the three water inlets of the housing, one end of the intercepting pipe connected to the housing water inlet, the other end of the intercepting pipe connected to the outlet pipe, one end of the branch pipe connected to the housing water inlet, the other end of the branch pipe connected to the outlet pipe body, and an intercepting filter screen fixed inside the intercepting pipe body.

[0006] As a preferred embodiment of this utility model, the lines connecting the three center points of the water inlets and the lines connecting the center points of the three ports of the T-shaped waterway are all in the form of equilateral triangles.

[0007] As a preferred embodiment of this utility model, a control valve is fixed to one end of both the branch pipe and the outlet pipe.

[0008] As a preferred embodiment of this utility model, both ends of the intercepting pipe are connected to the shell water inlet and the outlet pipe inlet respectively via flanges.

[0009] As a preferred embodiment of this utility model, a connecting shaft is fixed to the top of the valve body, the top end of the connecting shaft extends through the housing to the outside, and a lever is fixed to the end of the connecting shaft.

[0010] As a preferred embodiment of this utility model, the housing is provided with marking lines at the point where the connecting shaft passes through, and a limit post is fixed on the outer wall of the housing.

[0011] As a preferred embodiment of this utility model, a sealing gasket is installed between the housing and the valve body.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) By switching the valve body of the reversing valve and cooperating with the control valve, this utility model can switch between the filtration state and the backwashing state during normal system operation without interrupting the centrifugal pump's workflow, thus solving the problem of traditional filtration devices needing to be shut down for maintenance and significantly improving the continuity of system operation.

[0014] (2) The backwashing of this utility model does not require external power and has low energy consumption. The backwashing process is driven by the pressure of the medium at the bottom of the tower. It does not rely on external power or additional medium for backwashing. Compared with self-cleaning filters, it greatly reduces additional energy consumption, meets energy-saving requirements, and is suitable for industrial scenarios with long-term continuous operation.

[0015] (3) This utility model achieves primary fine filtration through the filter screen of the T-shaped waterway port to intercept micron-sized particulate impurities; during backwashing, the impurities washed down are collected again through the interception filter screen of the interception pipe to avoid backflow of impurities. The dual protection can effectively reduce the scale and impurities entering the centrifugal pump, reduce the risk of scale buildup in the pump body flow channel and mechanical seal failure, and extend the service life of the centrifugal pump.

[0016] (4) The overall structure is based on the reversing valve, with branch pipes, intercepting pipes and other components, without complex transmission mechanisms; the intercepting pipe is connected by flanges, making disassembly and cleaning convenient, and the filter screen and intercepting filter screen are easy to maintain and replace, which reduces the maintenance difficulty and cost compared with traditional complex mechanical filtration devices.

[0017] (5) No chemical scale inhibitors are required, which avoids the changes in the properties of the medium and environmental risks caused by chemical agents. Scale flakes are treated through physical filtration and interception, which meets environmental protection requirements and is suitable for petrochemical, water treatment and other fields with high requirements for media purity and environmental protection. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the valve body of this utility model.

[0022] In the diagram: 1. Housing; 2. Valve body; 3. T-shaped water channel; 4. Filter screen; 5. Water inlet; 6. Inlet pipe; 7. Branch pipe; 8. Interception pipe; 9. Outlet pipe; 10. Interception filter screen; 11. Control valve; 12. Connecting shaft; 13. Lever; 14. Marking line; 15. Limiting post; 16. Sealing gasket. Detailed Implementation

[0023] 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.

[0024] Example

[0025] Please see Figure 1-3 The present invention provides the following technical solution: a centrifugal pump protective tower bottom scale filter collector, including a reversing valve, the reversing valve including a housing 1, a valve body 2 movably connected inside the housing 1, a T-shaped water channel 3 opened inside the valve body 2, a filter screen 4 fixed at one end of the crossbeam of the T-shaped water channel 3, three water inlets 5 respectively opened on the side wall of the housing 1, an inlet pipe 6, a branch pipe 7, and a intercepting pipe 8 respectively connected to the three water inlets 5 of the housing 1, one end of the intercepting pipe 8 connected to the water inlet 5 of the housing 1, and the other end of the intercepting pipe 8 connected to the outlet pipe 9, one end of the branch pipe 7 connected to the water inlet 5 of the housing 1, and the other end of the branch pipe 7 connected to the body of the outlet pipe 9, and an intercepting filter screen 10 fixed inside the body of the intercepting pipe 8.

[0026] To ensure that the three ports of the T-shaped waterway 3 can accurately connect with the three water inlets 5 of the housing 1 when the valve body 2 rotates and switches, thus guaranteeing the reliability and sealing of the medium passage switching, in this embodiment, as a preferred technical solution of the present invention, the lines connecting the center points of the three water inlets 5 and the lines connecting the center points of the three ports of the T-shaped waterway 3 are all in the form of equilateral triangles.

[0027] In order to facilitate the control of the on / off state of the branch pipe 7 and the intercepting pipe 8, realize the precise switching between filtration and backwashing conditions, and ensure the controllability of system operation, in this embodiment, as a preferred technical solution of the present invention, a control valve 11 is fixed to one end of the branch pipe 7 and the outlet pipe 9.

[0028] In order to facilitate the quick disassembly and installation of the interception pipe 8, and to make it easier to clean or replace the interception filter screen 10 and reduce maintenance difficulty, in this embodiment, as a preferred technical solution of the present invention, both ends of the interception pipe 8 are connected to the water inlet 5 of the housing 1 and the outlet pipe 9 of the water outlet pipe 1 respectively through flanges.

[0029] In order to facilitate the rotation of the valve body 2 by driving the connecting shaft 12 through the lever 13 to realize the connection and switching between the T-shaped waterway 3 and different water inlets 5, and to make the operation simple and labor-saving, in this embodiment, as a preferred technical solution of the present invention, the valve body 2 is fixed with a connecting shaft 12 at the top, the top end of the connecting shaft 12 extends through the housing 1 to the outside, and the end is fixed with a lever 13.

[0030] In order to accurately indicate the rotation position of the valve body 2, and at the same time limit the rotation angle of the valve body 2 by the limiting post 15, to ensure the accuracy of the switching position and avoid over-rotation leading to sealing failure or incorrect passage, in this embodiment, as a preferred technical solution of the present invention, the housing 1 is provided with an marking line 14 at the through point of the connecting shaft 12, and the outer wall of the housing 1 is fixed with a limiting post 15.

[0031] In order to enhance the sealing performance between the housing 1 and the valve body 2, prevent the medium from leaking at the gap between them, and ensure the sealing and safety of the device operation, in this embodiment, as a preferred technical solution of the present invention, a sealing gasket 16 is installed between the housing 1 and the valve body 2.

[0032] In summary, the specific working principle of this utility model, based on the above-described technical solution, is as follows:

[0033] Normal filtration operation phase: When the filter collector is working normally, adjust the valve body 2 to the initial filtration position using the lever 13 (using the marking line 14 on the housing 1 and the limit post 15 to ensure accurate reversal). Figure 2As shown, at this time, the control valve 11 of the branch pipe 7 is in the open state, and the control valve 11 of the interception pipe 8 is in the closed state. The medium at the bottom of the tower enters the reversing valve housing 1 through the inlet pipe 6, and is guided by the T-shaped water channel 3 of the valve body 2 to flow to the branch pipe 7. During this process, the filter screen 4 at the crossbeam port of the T-shaped water channel 3 intercepts and filters the scale and particulate impurities in the medium. The filtered clean medium flows into the outlet pipe 9 through the branch pipe 7 and is finally delivered to the centrifugal pump, realizing the primary protection of the centrifugal pump. At the same time, the sealing gasket 16 between the housing 1 and the valve body 2 can effectively prevent medium leakage and ensure operational sealing.

[0034] Backwashing cleaning stage: When impurities accumulate on filter screen 4 after a period of use and filtration efficiency decreases, without interrupting system operation, the valve body 2 can be rotated 90° by using lever 13 to drive connecting shaft 12 (marking line 14 and limit post 15 ensure proper reversal). Figure 3 As shown, the T-shaped waterway 3 is switched to the backwashing passage; at this time, the control valve 11 of the branch pipe 7 is closed, and the control valve 11 of the interception pipe 8 is opened. The inlet pipe 6 and the interception pipe 8 are connected through the T-shaped waterway 3; after the medium at the bottom of the tower enters from the inlet pipe 6, it flows directly along the T-shaped waterway 3 to the filter screen 4 at the original filtration end. The medium's own pressure is used to backwash the filter screen 4, washing away the attached impurities; the impurities washed off flow into the interception pipe 8 with the medium and are intercepted and collected by the interception filter screen 10 inside the interception pipe 8, preventing the impurities from re-entering the system.

[0035] Maintenance and cleaning phase: After backwashing, turn valve body 2 back to the initial filtration position using lever 13, simultaneously open control valve 11 of branch pipe 7 and close control valve 11 of interceptor pipe 8, and the system resumes normal filtration operation. When the system reaches the appropriate maintenance cycle, interceptor pipe 8 can be easily disassembled because both ends of interceptor pipe 8 are connected to the water inlet 5 of housing 1 and the outlet pipe 9 via flanges. The scale and impurities collected on the interceptor filter screen 10 can be cleaned, and the interceptor pipe 8 can be reinstalled after cleaning to restore its use.

[0036] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centrifugal pump-protected bottom scale filter collector, comprising a reversing valve, characterized in that: The reversing valve includes a housing (1), a valve body (2) is movably connected inside the housing (1), a T-shaped water channel (3) is opened inside the valve body (2), a filter screen (4) is fixed at one end of the crossbeam of the T-shaped water channel (3), three water inlets (5) are opened on the side wall of the housing (1), and an inlet pipe (6), a branch pipe (7) and a intercepting pipe (8) are respectively connected to the three water inlets (5) of the housing (1). One end of the intercepting pipe (8) is connected to the water inlet (5) of the housing (1), and the other end of the intercepting pipe (8) is connected to the outlet pipe (9). One end of the branch pipe (7) is connected to the water inlet (5) of the housing (1), and the other end of the branch pipe (7) is connected to the body of the outlet pipe (9). An intercepting filter screen (10) is fixed inside the body of the intercepting pipe (8).

2. A centrifugal pump protective tower bottom scale filter collector according to claim 1, characterized in that: The lines connecting the center points of the three water inlets (5) and the lines connecting the center points of the three ports of the T-shaped waterway (3) all form an equilateral triangle structure.

3. A centrifugal pump protective tower bottom scale filter collector according to claim 1, characterized in that: A control valve (11) is fixed to one end of both the branch pipe (7) and the outlet pipe (9).

4. A centrifugal pump protective tower bottom scale filter collector according to claim 1, characterized in that: Both ends of the intercepting pipe (8) are connected to the water inlet (5) of the shell (1) and the outlet pipe (9) respectively via flanges.

5. A centrifugal pump protective tower bottom scale filter collector according to claim 1, characterized in that: The valve body (2) is fixed with a connecting shaft (12) at the top. The top end of the connecting shaft (12) extends through the housing (1) to the outside, and a lever (13) is fixed at the end.

6. A centrifugal pump protective tower bottom scale filter collector according to claim 5, characterized in that: The housing (1) has a marking line (14) at the point through which the connecting shaft (12) passes, and a limit post (15) is fixed on the outer wall of the housing (1).

7. A centrifugal pump protective tower bottom scale filter collector according to claim 1, characterized in that: A sealing gasket (16) is installed between the housing (1) and the valve body (2).

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