Water seal and water balance anti-blocking assembly

Abstract

The utility model discloses a water seal and water balance anti -blocking subassembly. The component is composed of casing and stainless steel cylinder filter core, is equipped with main channel big diameter section and main channel small throat section in casing and forms spacing step between two sections, and the coaxial filter core is arranged in the big diameter section, and the outside and inner chamber constitute first chamber and second chamber respectively, and the filter core water outlet is connected with small throat section with screw thread, realizes coaxial positioning and axial fixed. The component sets up parallel bypass channel, and communicates with the two sides of first chamber through upstream and downstream vertical communication hole, and inserts the one -way valve in one -way valve mounting hole and is equipped with insert type one -way valve, only allows inlet to export one -way flow, backflushing mouth communicates with first chamber, and is equipped with big diameter section pressure tapping, small throat section pressure tapping and the metering mouth that communicates with second chamber. The component compact structure can backflushing without stopping, and automatic bypass when blocking, and the differential pressure monitoring and net side metering are convenient, are applicable to centrifugal pump water seal pipeline and water balance pipeline.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump operation and maintenance technology, and in particular to a water seal and water balance anti-clogging component for a centrifugal pump water seal pipe and water balance pipe. Background Technology

[0002] Centrifugal pumps are widely used in coal mines, mineral processing, chemical industries, and circulating water systems. In engineering applications, water seal pipelines and water balance pipelines are often installed on the pump body. Current technologies generally have the following limitations: (1) When the medium contains solids or the operating conditions fluctuate, the branch is prone to blockage, which leads to increased air intake, heat generation, energy consumption, and even seal failure. (2) Conventional external filters require shutdown for disassembly and cleaning, resulting in high maintenance costs and slow recovery. (3) The lack of a bypass and check design integrated with the branch line makes it easy for blockages to cause supply interruptions; (4) The backwashing interfaces are mostly temporary modifications made on-site, resulting in a scattered layout and poor reliability; (5) The pressure tapping and metering interfaces are not unified, which is not conducive to blockage monitoring based on pressure difference and stable supply of small flow of water seal.

[0003] Therefore, there is an urgent need for a dedicated component that is compact in structure, has clear connectivity logic, can perform fast washing without stopping the machine, and has bypass protection. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a water seal and water balance anti-clogging component that, while ensuring a simple structure and easy installation, achieves standardization of filtration from the outside to the inside, bypass unidirectional protection, non-stop backwashing, pressure tapping, and metering.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: The water seal and water balance anti-clogging assembly includes a housing 1 and a stainless steel cylindrical filter element 7. The housing 1 has a main channel formed by the axial connection of a main channel large-diameter section 4 and a main channel small throat section 5, with a limiting step 6 between them. The stainless steel cylindrical filter element 7 is coaxially disposed in the main channel large-diameter section 4, so that its outer side and the inner wall of the main channel large-diameter section 4 form a first cavity 16, and its inner cavity and the main channel small throat section 5 form a second cavity 17. The outlet part of the stainless steel cylindrical filter element 7 is connected to the main channel small throat section 5 by a threaded connection structure, thereby connecting the second cavity 17 with the main channel small throat section 5 and coaxially positioning and fixing the stainless steel cylindrical filter element 7. The housing 1 has an inlet 2 and an outlet 3, and is provided with a large-diameter section pressure tap 13, a small throat section pressure tap 14, and a metering port 15 connected to the second cavity 17.

[0006] A bypass channel 8 is provided inside the housing 1 in parallel with the main channel. The bypass channel 8 is connected to the inlet and outlet sides of the first cavity 16 via an upstream vertical connecting hole 9 and a downstream vertical connecting hole 10, respectively. A cartridge-type one-way valve is installed at the one-way valve mounting hole 11, allowing only unidirectional flow from the inlet 2 to the outlet 3. A backwash port 12 is provided on the housing 1, which is connected to the first cavity 16. Its flow direction is opposite to the main flow direction, and it is used to inject cleaning flow to perform internal and external reverse flushing of the side wall of the stainless steel cylindrical filter element 7 without stopping the machine. An annular supply gap is formed between the large diameter section 4 of the main channel and the outer circle of the stainless steel cylindrical filter element 7 to evenly distribute the unfiltered fluid to its side wall along the length direction of the stainless steel cylindrical filter element 7.

[0007] As a preferred technical solution of this utility model, in the water seal mode: the metering port 15 is equipped with a needle valve as an interface for communicating with the external sealing cavity; in use, it is connected to the sealing cavity through an external pipeline, and a small flow of filtered liquid is output from the second cavity 17; the large-diameter section pressure tap 13 and the small throat section pressure tap 14 are respectively equipped with pressure measuring elements to monitor the front pressure and rear pressure of the stainless steel cylindrical filter element 7, which are used as clogging criteria and adjustment references.

[0008] As a preferred technical solution of this utility model, when in water balance mode: the metering port 15 is equipped with a blind plug to close the small flow output filtered by the stainless steel cylindrical filter element 7; the large diameter section pressure tap 13 and the small throat section pressure tap 14 are equipped with pressure measuring elements for operation monitoring and fault diagnosis.

[0009] As a preferred technical solution of this utility model, the one-way valve mounting hole 11 is a shoulder structure arranged laterally to realize the detachable and replaceable cartridge one-way valve. The cartridge one-way valve closes to prevent backflow when the pressure difference decreases or a reverse pressure difference occurs.

[0010] As a preferred technical solution of this utility model, the backwash port 12 is a threaded pipe that communicates with the first cavity 16. During rinsing, the cleaning flow forms a reverse scouring effect on the side wall of the stainless steel cylindrical filter element 7 through the first cavity 16.

[0011] As a preferred technical solution of this utility model, the annular supply gap can be achieved by the fit tolerance between the main channel large diameter section 4 and the stainless steel cylindrical filter element 7, or by forming shallow grooves or knurling on the surface of the main channel large diameter section 4 and the stainless steel cylindrical filter element 7, so as to improve the flow distribution along the unfiltered side and reduce the local resistance at the inlet.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Integrated: Filtration, bypass channel, pressure tapping and metering, and backwashing are all integrated into the housing 1, which is compact and easy to assemble; 2. Quick wash without stopping the machine: The backwash port 12 directly acts on the stainless steel cylindrical filter element 7, which can quickly restore the filtration performance without stopping the machine; 3. Anti-blockage and uninterrupted flow: The bypass channel 8 is automatically opened by the pressure difference under the action of the cartridge-type check valve to maintain the continuity of the branch; 4. Safer water seal: Metering port 15 is taken from the clean side of the second chamber 17, ensuring the quality of the water seal at low flow rates; 5. Monitoring-friendly: The large-diameter section pressure tap 13 and the small throat section pressure tap 14 naturally form a front-to-back pressure difference detection point, which facilitates predictive maintenance; 6. Reliable assembly: The stainless steel cylindrical filter element 7 and the main channel throat section 5 adopt a threaded connection structure to achieve coaxial positioning and axial fixation, and have good interchangeability. Attached Figure Description

[0013] 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: Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is the front view of this utility model; Figure 3 This is a cross-sectional view of the present invention; In the diagram: 1. Shell; 2. Inlet; 3. Outlet; 4. Main channel large diameter section; 5. Main channel small throat section; 6. Limiting step; 7. Stainless steel cylindrical filter element; 8. Bypass channel; 9. Upstream vertical connecting hole; 10. Downstream vertical connecting hole; 11. One-way valve mounting hole; 12. Backwash port; 13. Large diameter section pressure tap; 14. Small throat section pressure tap; 15. Metering port; 16. First chamber; 17. Second chamber. Detailed Implementation

[0014] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0015] In the attached diagram, all identical reference numerals refer to the same components.

[0016] like Figures 1-3As shown, this utility model provides a water seal and water balance anti-clogging component, including a housing 1 and a stainless steel cylindrical filter element 7. A main channel is formed within the housing 1, consisting of a large-diameter section 4 and a small throat section 5, with a limiting step 6 between them. The stainless steel cylindrical filter element 7 is coaxially arranged within the large-diameter section 4 of the main channel, such that the outer side of the stainless steel cylindrical filter element 7 and the inner wall of the large-diameter section 4 form a first cavity 16, and the inner cavity of the stainless steel cylindrical filter element 7 and the small throat section 5 of the main channel form a second cavity 17. The outlet portion of the stainless steel cylindrical filter element 7 is connected to the small throat section 5 of the main channel via a threaded connection, realizing the communication between the second cavity 17 and the small throat section 5 of the main channel, as well as the coaxial positioning and axial fixation of the stainless steel cylindrical filter element 7. An inlet 2 and an outlet 3 are provided on the housing 1, and a pressure tap 13 for the large-diameter section, a pressure tap 14 for the small throat section, and a metering port 15 communicating with the second cavity 17 are also provided.

[0017] Pressure measuring elements are respectively installed at the large-diameter pressure tap 13 and the small-throat pressure tap 14 to monitor the pressure before and after the stainless steel cylindrical filter element 7 and obtain the pressure difference. The pressure measuring element can be a pressure gauge, a pressure transmitter, or a differential pressure transmitter, or a pressure switch or a differential pressure switch; preferably, it is a differential pressure transmitter, with its positive pressure side connected to the large-diameter pressure tap 13 and its negative pressure side connected to the small-throat pressure tap 14. The measuring range is selected according to the working conditions, the accuracy is preferably ≤0.5%FS, and the output is 4–20 mA.

[0018] The housing 1 is provided with a bypass channel 8 connected in parallel with the main channel. The bypass channel 8 is connected to the inlet side of the first cavity 16 through the upstream vertical connecting hole 9 and to the outlet side of the first cavity 16 through the downstream vertical connecting hole 10. A cartridge-type one-way valve is installed at the one-way valve mounting hole 11, so that the bypass channel 8 only allows unidirectional flow from the inlet 2 to the outlet 3, and closes when the pressure difference decreases or a reverse pressure difference occurs. The housing 1 is provided with a backwash port 12 connected to the first cavity 16, which is used to inject cleaning flow to perform internal and external reverse flushing of the sidewall of the stainless steel cylindrical filter element 7 without shutting down the machine.

[0019] The method of using this utility model is as follows: 1. Installation Method: This component is an independent module integrating filtration, bypass, and backwashing. It is suitable for liquid pipelines such as water seal branches or water balance branches of centrifugal pumps, but is not limited to these. During installation, inlet 2 is connected to the upstream liquid supply end, and outlet 3 is connected to the downstream liquid consumption end; the one-way valve in the bypass channel allows flow from the inlet to the outlet and automatically closes in the reverse direction; backwash port 12 serves as an interface for an external cleaning source.

[0020] 2. Water seal mode: The metering port 15 is equipped with a needle valve as an interface for communication with the external sealing cavity; in use, it is connected to the sealing cavity through an external pipeline, and a small flow of filtered liquid is output from the second cavity 17; the large-diameter pressure tap 13 and the small-throat pressure tap 14 are equipped with pressure measuring elements to monitor the pressure before and after the stainless steel cylindrical filter element 7 and calculate the pressure difference; when the pressure difference rises to the threshold, the backwash port 12 is opened for cleaning; 3. Water balance mode: The metering port 15 is equipped with a blind plug to shut off the filtered small flow output from the second chamber 17; the large-diameter pressure tap 13 and the small-throat pressure tap 14 are equipped with pressure measuring elements for operation monitoring; under the tendency of blockage, the bypass channel 8 is automatically opened by the differential pressure under the action of the cartridge-type check valve to maintain continuity; 4. Backwashing without stopping the machine: Open the backwash port 12 to inject the cleaning flow. The cleaning flow passes through the first chamber 16 to backwash the side wall of the stainless steel cylindrical filter element 7. After the cleaning is completed, close the backwash port 12.

[0021] Furthermore, the one-way valve mounting hole 11 is provided with a shoulder and a sealing surface to achieve reliable positioning and sealing of the cartridge-type one-way valve; the opening pressure of the cartridge-type one-way valve is selected according to the working conditions, so as to keep it closed under the normal pressure drop of the stainless steel cylindrical filter element 7, and automatically open the bypass channel 8 when there is significant blockage. The connection specifications of the metering port 15, the large-diameter section pressure tap 13 and the small throat section pressure tap 14 can be selected according to the project standards.

[0022] In another embodiment, two gauge pressure transmitters can be installed at the large-diameter section pressure tap 13 and the small-throat section pressure tap 14 respectively, and the pressure difference can be calculated in the control unit; when the pressure difference exceeds the set threshold, it can be cleaned through the backwash port 12.

[0023] This utility model is a water seal and water balance anti-clogging component with a compact structure, standardized interface, and easy assembly and maintenance. It is applicable to water seal pipelines and water balance pipelines of various centrifugal pumps under solid or fluctuating working conditions.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A water seal and water balance anti-clogging component, comprising a housing (1) and a stainless steel cylindrical filter element (7), wherein the housing (1) is provided with an inlet (2) and an outlet (3), characterized in that, The housing (1) is provided with a main channel consisting of a main channel large diameter section (4) and a main channel small throat section (5) axially connected, with a limiting step (6) between them. The inlet (2) is connected to the main channel large diameter section (4), and the outlet (3) is connected to the main channel small throat section (5). The stainless steel cylindrical filter element (7) is coaxially arranged inside the large diameter section (4) of the main channel, so that its outer side and the inner wall of the large diameter section (4) of the main channel form a first cavity (16), and its inner cavity and the small throat section (5) of the main channel form a second cavity (17). The outlet part of the stainless steel cylindrical filter element (7) is connected to the small throat section (5) of the main channel by a threaded connection structure, thereby making the second cavity (17) communicate with the small throat section (5) of the main channel and coaxially positioning and axially fixing the stainless steel cylindrical filter element (7). The housing (1) has a large-diameter section pressure tap (13) connected to the large-diameter section (4) of the main channel, a small throat section pressure tap (14) connected to the small throat section (5) of the main channel, and a metering port (15) connected to the second cavity (17) on its side.

2. The water seal and water balance anti-clogging component according to claim 1, characterized in that, The metering port (15) is equipped with a needle valve or a blind plug.

3. The water seal and water balance anti-clogging component according to claim 1, characterized in that, The large-diameter section pressure tap (13) and the small throat section pressure tap (14) are respectively equipped with pressure measuring elements for monitoring the pressure before and after the stainless steel cylindrical filter element (7).

4. The water seal and water balance anti-clogging component according to claim 1, characterized in that, The housing (1) is provided with a bypass channel (8) connected in parallel with the main channel; the bypass channel (8) is provided with an upstream vertical connecting hole (9) and a downstream vertical connecting hole (10), and is connected to the inlet side of the first cavity (16) through the upstream vertical connecting hole (9), and is connected to the outlet side of the second cavity (17) through the downstream vertical connecting hole (10); the bypass channel (8) is provided with a one-way valve mounting hole (11), and a cartridge one-way valve is installed at the one-way valve mounting hole (11), which only allows one-way flow from the inlet (2) to the outlet (3), and closes when the pressure difference decreases or a reverse pressure difference occurs.

5. The water seal and water balance anti-clogging component according to claim 4, characterized in that, The housing (1) is provided with a backwash port (12) that communicates with the first cavity (16). Its flow direction is opposite to the mainstream direction from the inlet (2) to the outlet (3). It is used to inject cleaning flow without stopping the machine and to backwash the side wall of the stainless steel cylindrical filter element (7).

6. The water seal and water balance anti-clogging component according to claim 5, characterized in that, The main channel large diameter section (4) forms an annular flow gap between the outer circle of the stainless steel cylindrical filter element (7) to evenly distribute the unfiltered fluid along the length of the stainless steel cylindrical filter element (7) to its side wall.

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