A pump front filter and method of use

Abstract

The application discloses a pump front filter without disassembly and washing and a use method, and belongs to the technical field of pump front filters. The pump front filter comprises an intermediate partition plate for separation, which is arranged between a lower chamber and an upper chamber; a conical filter screen, which is arranged in the upper chamber and connected with the lower chamber through the intermediate partition plate; a transmission rod support, which is arranged in the lower chamber; a control valve core assembly, which is arranged on the transmission rod support and connected with the lower end of the conical filter screen; an inlet unit, which is arranged on one side outside the upper chamber and the lower chamber; and an outlet unit, which is arranged on the other side outside the upper chamber and the lower chamber. The inlet unit and the outlet unit are matched with each other for forward and reverse flushing. The pump front filter is not only beneficial to disassembly and maintenance, but also beneficial to replacement and timely improvement measures, replacement of materials and technical adjustment. The filter screen process is provided with double inlet and double outlet, and the forward and reverse flushing self-cleaning can be realized. The pump front filter can meet the lower chamber flushing function and the low-inlet and high-outlet filtering function, and can also realize short-time lower chamber sedimentation separation, upper chamber opening inspection and non-stop production maintenance and maintenance functions.

Description

Technical Field

[0001] This invention belongs to the field of pre-pump filtration technology, specifically relating to a pre-pump filter that does not require disassembly and cleaning, and its usage method. Background Technology

[0002] Compared to conventional pre-pump filters, which typically employ basket, plate, or screen types, there is a high probability that they will introduce mud, sand, small stones, rust, welding slag, etc., during the pump's fluid intake process. This is particularly problematic in crude oil production, where the introduction of downhole sand and gravel into the system is especially serious. Larger filters are difficult to disassemble and maintain, while smaller filters are prone to blockage due to their smaller collection chambers. Cleaning requires shutting down the unit or replacing equipment, impacting production and significantly increasing workload. Currently, due to filter blockage, the wastewater pumps in the station experience pump cavitation failures more than once a month, requiring on-site handling. The Y-shaped filters before the light hydrocarbon pumps are affected by rust and welding slag within the system, requiring disassembly and cleaning approximately once a week, each time requiring at least two people. This not only involves a large workload and impacts production but also easily pollutes the environment and increases the management burden. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a pre-pump filter that does not require disassembly and cleaning and its usage method, so as to solve the problems that in the prior art, when the filter of the sewage pump in the station is large, it is difficult to disassemble, inspect and maintain it, and when it is small, it is easy to get blocked due to the small size of the sludge collection chamber, and the cleaning pump has a large workload and heavy burden.

[0004] To achieve the above objectives, the present invention employs the following technical solution: This invention discloses a pre-pump filter that does not require disassembly and cleaning, comprising: a lower chamber, a middle partition, an inlet flow path, an upper chamber, a conical filter screen, a transmission rod support, an outlet flow path, and a control valve core assembly; the middle partition for separation is located between the lower chamber and the upper chamber, the conical filter screen is located in the upper chamber and passes through the middle partition to connect with the lower chamber, the transmission rod support is located in the lower chamber, the control valve core assembly is located on the transmission rod support and connected to the lower end of the conical filter screen, the inlet flow path is located on one side outside the upper and lower chambers, and the outlet flow path is on the other side outside the upper and lower chambers, and the inlet flow path and the outlet flow path cooperate with each other for forward and reverse flushing.

[0005] Preferably, the conical filter screen is detachably installed in the upper chamber, and the conical filter screen is connected to the lower chamber by an insertion method.

[0006] Preferably, the transmission rod bracket is provided with a transmission rod handwheel and a packing gland cover, which are located at the ends of the transmission rod bracket.

[0007] Preferably, the control valve core assembly includes: an intermediate plate, a valve core, and a valve core pressure plate; the valve core is fixed to the intermediate plate by the valve core pressure plate, and the intermediate plate is fixed to the transmission rod support.

[0008] Preferably, the control valve core assembly is a hollow ball valve core, and a 90° limiting groove is provided on the intermediate plate and the valve core pressure plate, and a limiting pin is provided on the valve core to cooperate with the limiting groove; a sealing gasket is also provided between the valve core and the intermediate plate.

[0009] Preferably, the lower chamber is further provided with a recessed observation window for observing the internal condition of the filter.

[0010] Preferably, the control valve core assembly adopts a four-sided male-female connection transmission rod bracket.

[0011] Preferably, the inlet process includes: an upper cylinder inlet valve, a lower cylinder inlet valve, and a top inlet connecting valve. The top inlet connecting valve is located at the upper end of the upper chamber, the upper cylinder inlet valve is located outside the upper chamber, and both the upper cylinder inlet valve and the top inlet connecting valve are connected to the upper chamber through pipes. The lower cylinder inlet valve is located outside the lower chamber and is connected to the lower chamber through pipes.

[0012] Preferably, the outlet process includes: a bottom sewage collection valve, a bottom sewage valve, a top outlet connecting valve, an upper cylinder outlet valve, a lower cylinder outlet valve, and a sewage inlet / outlet system connecting valve; the top outlet connecting valve is located at the upper end of the upper chamber, the upper cylinder outlet valve is located outside the upper chamber, and both the top outlet connecting valve and the upper cylinder outlet valve are connected to the upper chamber via pipes; the lower cylinder outlet valve is located outside the lower chamber and is connected to the lower chamber via a pipe; the bottom sewage valve is located at the bottom end of the lower chamber, and the bottom sewage collection valve is located below the bottom sewage valve. Furthermore, the sewage inlet / outlet system connecting valve connects the bottom sewage collection valve and the bottom sewage valve.

[0013] This invention also discloses a method for using a pre-pump filter that does not require disassembly and cleaning, comprising: During normal production, the medium enters from the top of the upper chamber, is filtered by the conical filter screen, and then enters the downstream pipeline from the outlet unit connected to the upper chamber. Under the action of gravity, the dirt enters the lower chamber through the valve hole of the middle partition to be deposited and recycled, and the recycled dirt is discharged periodically. During backwashing, the medium enters from the inlet unit on the side of the upper chamber and exits from the outlet unit at the top of the upper chamber. Other inlets and outlets are closed during backwashing, and the process is returned to normal after backwashing is completed. During discharge, first close the control valve core assembly on the middle partition, and then connect the waste to the waste recovery system through the pipeline at the bottom of the lower chamber. After the waste is discharged, open the inlet unit connected to the lower chamber to flush the lower chamber until the discharge is clean. When inspecting the conical filter without stopping production, first flush out the dirt in the lower chamber, then close the control valve core assembly on the middle partition, open the inlet and outlet units connected to the lower chamber, and use the internal volume space of the lower chamber to achieve gravity sedimentation separation. After the upper chamber is disassembled and inspected in a short time, the normal production process can be resumed.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a pre-pump filter that requires no disassembly and cleaning. The upper and lower chambers, the conical filter screen, and the intermediate partition are all independent units, facilitating disassembly and maintenance, as well as upgrades, timely improvements, material changes, and technical adjustments. The bottom of the conical filter screen is connected to the lower chamber, providing not only fixation but also improved efficiency in certain situations. It offers more space and modification options for addressing specific problems encountered during operation, such as replacing sealing rings. The inlet and outlet units, in conjunction with the upper and lower chambers, create a dual-inlet, dual-outlet filter flow, enabling both forward and reverse flushing for self-cleaning. It satisfies the lower chamber flushing function and low-inlet, high-outlet filtration function, and also allows for short-term lower chamber sedimentation separation and upper chamber opening for inspection without interrupting production for maintenance. The container volume, combined with the high-inlet, low-outlet flow, prevents cavitation during pumping when the volume is more than twice the pipeline volume, even without a bottom valve at the suction inlet. This effectively prevents pump cavitation. The bottom drain flow and drain valve reduce environmental pollution and facilitate waste recovery.

[0015] Furthermore, the cone-shaped filter screen is connected to the lower chamber via an insert mechanism, which effectively prevents dirt from being blocked and accumulating. Attached Figure Description Figure 1 This is a schematic diagram of the device structure of the present invention; Figure 2 This is a schematic diagram of the intermediate plate structure of the present invention; Figure 3 This is a schematic diagram of the valve core structure of the present invention; Figure 4 This is a schematic diagram of the valve core pressure plate structure of the present invention; Figure 5 This is a schematic diagram of the lower chamber structure of the present invention; Figure 6 The conical filter screen of this invention.

[0016] Wherein: 1-Lower chamber; 2-Intermediate partition; 3-Inlet flow; 4-Upper chamber; 5-Conical filter screen; 6-Drive rod bracket; 7-Drive rod handwheel and packing gland; 8-Outlet flow; 9-Control valve core assembly; 10-Bottom drain collection valve; 11-Bottom drain valve; 12-Lower cylinder inlet valve; 13-Upper cylinder inlet valve; 14-Top inlet connecting valve; 15-Top outlet connecting valve; 16-Upper cylinder outlet valve; 17-Lower cylinder outlet valve; 18-Inlet / outlet flow connecting valve for the sewage system; 19-Recessed observation window; 20-Intermediate plate; 21-Valve core; 22-Valve core pressure plate. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] Compared to conventional pre-pump filters, which typically employ basket, plate, or screen types, there is a high probability that they will introduce mud, sand, small stones, rust, welding slag, etc., during the pump's fluid intake process. This is particularly problematic in crude oil production, where the introduction of downhole sand and gravel into the system is especially serious. Larger filters are difficult to disassemble and maintain, while smaller filters are prone to blockage due to their smaller collection chambers. Cleaning requires shutting down the unit or replacing equipment, impacting production and significantly increasing workload. Currently, due to filter blockage, the wastewater pumps in the station experience pump cavitation failures more than once a month, requiring on-site handling. The Y-shaped filters before the light hydrocarbon pumps are affected by rust and welding slag within the system, requiring disassembly and cleaning approximately once a week, each time requiring at least two people. This not only involves a large workload and impacts production but also easily pollutes the environment and increases the management burden.

[0020] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a pre-pump filter that does not require disassembly and cleaning and its usage method, so as to solve the problems that in the prior art, when the filter of the sewage pump in the station is large, it is difficult to disassemble, inspect and maintain it, and when it is small, it is easy to get blocked due to the small size of the sludge collection chamber, and the cleaning pump has a large workload and heavy burden.

[0021] This invention discloses a pre-pump filter that requires no disassembly and cleaning. The upper and lower chambers, the conical filter screen, and the intermediate partition are all independent units, facilitating disassembly and maintenance, as well as upgrades, timely improvements, material changes, and technical adjustments. The bottom of the conical filter screen is connected to the lower chamber, providing not only fixation but also improved efficiency in certain situations. It offers more space and modification options for addressing specific problems encountered during operation, such as replacing sealing rings. The inlet and outlet units, in conjunction with the upper and lower chambers, create a dual-inlet, dual-outlet filter flow, enabling both forward and reverse flushing for self-cleaning. It satisfies the lower chamber flushing function and low-inlet, high-outlet filtration function, and also allows for short-term lower chamber sedimentation separation and upper chamber opening for inspection without interrupting production for maintenance. The container volume, combined with the high-inlet, low-outlet flow, prevents cavitation during pumping when the volume is more than twice the pipeline volume, even without a bottom valve at the suction inlet. This effectively prevents pump cavitation. The bottom drain flow and drain valve reduce environmental pollution and facilitate waste recovery.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings: See Figures 1-6 This application discloses a pre-pump filter that does not require disassembly and cleaning, comprising: a lower chamber 1, a middle partition 2, an inlet flow 3, an upper chamber 4, a conical filter screen 5, a transmission rod support 6, an outlet flow 8, and a control valve core assembly 9; the middle partition 2 for separation is disposed between the lower chamber 1 and the upper chamber 4, the conical filter screen 5 is disposed in the upper chamber 4 and passes through the middle partition 2 to connect with the lower chamber 1, the transmission rod support 6 is disposed in the lower chamber 1, the control valve core assembly 9 is disposed on the transmission rod support 6 and connected to the lower end of the conical filter screen 5, the inlet flow 3 is disposed on one side outside the upper chamber 4 and the lower chamber 1, and the outlet flow 8 is disposed on the other side outside the upper chamber 4 and the lower chamber 1, and the inlet flow 3 and the outlet flow 8 cooperate with each other for forward and reverse flushing.

[0023] The components include an inlet process 3 and an outlet process 8, an upper chamber 4 and a lower chamber 1. The upper chamber 4 is equipped with a conical filter screen 5, which helps to block and filter impurities. The conical filter screen 5 is an independent component that can be disassembled, repaired and replaced. Furthermore, the conical filter screen 5 is detachably installed in the upper chamber 4, and the conical filter screen 5 is connected to the lower chamber 1 via an insertion connection. The bottom of the conical filter screen is connected to the lower chamber via an insertion connection, which not only serves a fixing function, but also improves working efficiency in certain situations, solves specific problems that occur during operation, such as replacing the sealing ring, provides more space and modification conditions, and the insertion connection can effectively prevent dirt from being blocked and accumulated.

[0024] Furthermore, under the action of the intermediate partition 2, it is divided into upper and lower chambers. The intermediate partition 2 is detachably connected to the outer ring of the upper and lower outer cylinders by flanges. The connection and disconnection are controlled by a control valve core assembly 9. When working, the connection state is opened so that solid impurities can be absorbed by the lower chamber. When cleaning is required, the connection channel is closed and the bottom of the lower chamber 1 is drained to discharge and recycle the waste.

[0025] Furthermore, the control valve core assembly 9 adopts a hollow ball valve core. The valve core 21 is fixed to the intermediate plate 20 by the valve core pressure plate 22, and the intermediate plate 20 is fixed to the transmission rod bracket 6. The valve core 21 is designed with a 90-degree limiting groove and a limiting pin to allow the valve core 21 to rotate only within a specified range. Therefore, there are only two states: on and off. To increase the sealing performance of the ball valve, a rubber gasket is provided on the valve seat, i.e., the intermediate plate 20. This design allows the valve core 21 to rotate only within a specified range, thus effectively preventing operational errors. The hollow ball valve core used for switching uses a four-sided male and female connection transmission rod. A sealing cap is provided outside the cylinder, and the packing chamber is sealed with graphite packing. A handwheel and an anti-rotation safety pin are provided at the outer end of the transmission rod. The external anti-rotation locking pin can reduce the change of valve position caused by vibration or fluid impact during production, which affects the flow capacity.

[0026] The filter screen process is designed with dual inlets and dual outlets. Short sections are led out from the symmetrical sides outside the upper chamber 4, and valves are added for control. A connecting pipe is led out from the top cover plate of the upper chamber 4, and a T-junction is provided at the end to connect two control valves, which are connected to the inlet and outlet pipelines respectively, allowing for forward and reverse flushing. The top inlet connecting valve 14 is located at the upper end of the upper chamber 4, and the upper cylinder inlet valve 13 is located outside the upper chamber 4. Both the upper cylinder inlet valve 13 and the top inlet connecting valve 14 are connected to the upper chamber 4 through pipelines. The lower cylinder inlet valve 12 is located outside the lower chamber 1 and is connected to the lower chamber 1 through a pipeline. The top outlet connecting valve 15 is located at the upper end of the upper chamber 4, and the upper cylinder outlet valve 16 is located outside the upper chamber 4. Both the top outlet connecting valve 15 and the upper cylinder outlet valve 16 are connected to the upper chamber 4 through pipelines. The lower cylinder outlet valve 17 is located outside the lower chamber 1 and is connected to the lower chamber 1 through a pipeline. The bottom drain valve 11 is located at the bottom of the lower chamber 1, and the bottom drain collection valve 10 is located below the bottom drain valve 11. Furthermore, a flow connection valve 18 for the inlet and outlet sewage system is connected between the bottom sewage collection valve 10 and the bottom sewage valve 11. During normal production, the medium enters from the top and exits from the side wing outlet; During flushing, the medium enters through the side inlet and exits through the top; This effectively allows solid contaminants in the liquid medium to settle and collect in the lower collection cylinder. During backwashing, contaminants in the filter screen are also flushed away and collected. It is important to control the backwashing time to 3-5 minutes. The container volume and the high-inlet, low-outlet flow design effectively prevent pump cavitation.

[0027] The lower chamber 1 is equipped with an inlet pipe at the top, which can meet the functions of lower chamber flushing and low-inlet, high-outlet filtration. When the bottom dirt is collected, the four-sided wrench is turned to expose the four-sided head by rotating the connecting rod 45 degrees. This closes the ball valve on the middle partition 2 via the connecting rod transmission and opens the drain valve at the bottom of the lower cylinder, thus opening the drain flow. When the dirt discharge is completed or there is resistance to the discharge, the inlet valve on the side of the lower cylinder is opened to pressurize the lower cylinder and flush the dirt in the lower cylinder. When the upper filter screen is being maintained and cleaned, the lower inlet and outlet flow is opened, which can also achieve short-term lower chamber sedimentation and separation. The upper chamber can be opened for inspection and cleaning, thus achieving maintenance and upkeep without interrupting production.

[0028] A method for using a pre-pump filter that does not require disassembly and cleaning includes: 1. During normal production, the top inlet connecting valve 14 and the upper cylinder outlet valve 16 are open. The medium enters through the top inlet connecting valve 14, is filtered by the cone filter screen 5, and then enters the downstream pipeline through the upper cylinder outlet valve 16. Under the action of gravity, the dirt enters the lower cylinder through the valve hole of the middle partition 2 and is deposited and recovered. The recovered dirt is discharged periodically.

[0029] 2. To prevent the cone filter screen 5 from becoming clogged, the backwashing frequency should be determined based on the content of contaminants in the medium. The backwashing should be performed for 3-5 minutes at regular intervals. During backwashing, the upper cylinder inlet valve 13 and the top outlet connecting valve 15 should be opened. The medium enters from the upper cylinder inlet valve 13 and exits from the top outlet connecting valve 15. Other process valves should be closed during backwashing. After backwashing is completed, the flow should be reversed to the normal production process of entering from the top inlet connecting valve 14 and exiting from the upper cylinder outlet valve 16.

[0030] 3. Waste Collection Operation Procedure: Based on the content of waste and impurities in the assessed medium, specify the waste collection frequency. During discharge, first close the control ball valve in the control valve core assembly 9 on the intermediate partition 2 by rotating it 45 degrees via the transmission handle outside the connecting rod. Open the bottom drain valve 11 to connect the waste to the waste collection system through the pipeline. If there are many solid impurities in the waste, simultaneously open the bottom drain collection valve 10 to collect the waste over a short distance. After the waste is discharged, open the lower cylinder inlet valve 12 to flush the lower chamber 1 until the discharged material is clean.

[0031] 4. The filter inspection procedure is as follows: First, drain and flush the contaminants from the lower cylinder. Then, close the valve core on the intermediate plate and open the lower cylinder inlet valve 12 and lower cylinder outlet valve 17. Utilize the volume space within the lower chamber 1 to achieve gravity settling and separation. After completing the upper disassembly and inspection in a short time, normal production can resume. Considering that contaminants may enter the downstream process, a small Y-type pipeline filter can be installed in the outlet pipeline.

[0032] Furthermore, the upper and lower chambers, filter screen, and baffles are all independent units, which not only facilitates disassembly and maintenance but also allows for upgrades, timely improvements, material replacements, and technical adjustments. The conical bottom of the filter screen is connected to the lower chamber via an insert mechanism, which not only provides a fixing function but also improves work efficiency in certain situations, resolving specific problems that arise during operation, such as replacing sealing rings. This provides more space and conditions for modification, and the insert mechanism effectively prevents dirt from being blocked and accumulated.

[0033] Furthermore, the central ball valve core is designed with a 90-degree limiting groove and a limiting pin, ensuring that the valve core rotates only within a specified range. Therefore, it only has two states: on and off, effectively preventing operational errors. An external anti-rotation pin reduces valve position changes caused by vibration or fluid impact during production, thus minimizing impact on throughput. The external stuffing box design increases the valve stem's sealing performance, reducing leakage and wear. A rubber gasket on the valve seat reduces seal wear and lowers replacement costs. The on / off ball valve uses a four-sided male-female connection for the transmission rod, increasing strength and facilitating disassembly.

[0034] Furthermore, the filter process is designed with dual inlets and dual outlets, enabling not only forward and reverse flushing for self-cleaning, but also fulfilling the functions of lower chamber flushing and low-inlet, high-outlet filtration. It also allows for short-term lower chamber sedimentation separation and upper chamber opening for inspection without interrupting production for maintenance. The container volume, combined with the high-inlet, low-outlet flow pattern, prevents cavitation during pumping when the pump volume is more than twice the pipeline volume, even without a bottom valve at the suction inlet. This effectively prevents pump cavitation. The bottom drain process and drain valve reduce environmental pollution and facilitate waste recovery.

[0035] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A pre-pump filter that does not require disassembly and cleaning, characterized in that, include: The lower chamber (1), the middle partition (2), the inlet flow (3), the upper chamber (4), the conical filter (5), the transmission rod support (6), the outlet flow (8), and the control valve core assembly (9) are arranged in the middle between the lower chamber (1) and the upper chamber (4). The conical filter (5) is arranged in the upper chamber (4) and passes through the middle partition (2) to connect with the lower chamber (1). The transmission rod support (6) is arranged in the lower chamber (1). The control valve core assembly (9) is arranged on the transmission rod support (6) and connected to the lower end of the conical filter (5). The inlet flow (3) is arranged on one side outside the upper chamber (4) and the lower chamber (1). The outlet flow (8) is on the other side outside the upper chamber (4) and the lower chamber (1). The inlet flow (3) and the outlet flow (8) cooperate with each other for forward and reverse flushing. The control valve core assembly (9) includes: an intermediate plate (20), a valve core (21) and a valve core pressure plate (22); the valve core (21) is fixed on the intermediate plate (20) by the valve core pressure plate (22), and the intermediate plate (20) is fixed on the transmission rod bracket (6); The control valve core assembly (9) is a hollow ball valve core, and a 90° limiting groove is provided on the intermediate plate (20) and the valve core pressure plate (22). A limiting pin is provided on the valve core (21) to cooperate with the limiting groove. A sealing gasket is also provided between the valve core (21) and the intermediate plate (20). The import process (3) includes: an upper cylinder inlet valve (13), a lower cylinder inlet valve (12) and a top inlet connecting valve (14). The top inlet connecting valve (14) is located at the upper end of the upper chamber (4), the upper cylinder inlet valve (13) is located outside the upper chamber (4), and both the upper cylinder inlet valve (13) and the top inlet connecting valve (14) are connected to the upper chamber (4) through pipes. The lower cylinder inlet valve (12) is located outside the lower chamber (1) and is connected to the lower chamber (1) through pipes. The outlet process (8) includes: a bottom sewage collection valve (10), a bottom sewage valve (11), a top outlet connecting valve (15), an upper cylinder outlet valve (16), a lower cylinder outlet valve (17), and an inlet / outlet sewage system process connecting valve (18); the top outlet connecting valve (15) is located at the upper end of the upper chamber (4), the upper cylinder outlet valve (16) is located outside the upper chamber (4), and both the top outlet connecting valve (15) and the upper cylinder outlet valve (16) are connected to the upper chamber (4) through pipes; the lower cylinder outlet valve (17) is located outside the lower chamber (1) and is connected to the lower chamber (1) through pipes; the bottom sewage valve (11) is located at the bottom end of the lower chamber (1), the bottom sewage collection valve (10) is located below the bottom sewage valve (11), and the inlet / outlet sewage system process connecting valve (18) is connected between the bottom sewage collection valve (10) and the bottom sewage valve (11).

2. The pre-pump filter that does not require disassembly and cleaning according to claim 1, characterized in that, The conical filter (5) is detachably installed in the upper chamber (4), and the conical filter (5) is connected to the lower chamber (1) by an insertion method.

3. The pre-pump filter that does not require disassembly and cleaning according to claim 1, characterized in that, The transmission rod bracket (6) is provided with a transmission rod handwheel and a packing gland cover (7), which are located at the end of the transmission rod bracket (6).

4. A pre-pump filter that does not require disassembly and cleaning, as described in claim 1, is characterized in that... The lower chamber (1) is also provided with a recessed observation window (19) for observing the internal condition of the filter.

5. A pre-pump filter that does not require disassembly and cleaning, as described in claim 1, is characterized in that... The control valve core assembly (9) is connected to the transmission rod bracket (6) via a square male and female connector.

6. A method of using a pre-pump filter that does not require disassembly and cleaning, according to any one of claims 1 to 5, characterized in that, include: During normal production, the medium enters from the top of the upper chamber (4), is filtered by the conical filter screen (5), and enters the downstream pipeline through the upper cylinder outlet valve (16) connected to the upper chamber (4). Under the action of gravity, the dirt enters the lower chamber (1) through the valve hole of the middle partition plate (2) and is deposited and recycled. The recycled dirt is discharged periodically. During backwashing, the medium enters from the upper cylinder inlet valve (13) on the side of the upper chamber (4) and exits from the top outlet connecting valve (15) at the top of the upper chamber (4). During backwashing, other inlets and outlets are closed. After backwashing, the process is returned to normal. When discharging, first close the control valve core assembly (9) on the middle partition (2), and connect the waste to the waste recycling system through the pipeline through the bottom of the lower chamber (1). After the waste is discharged, open the lower cylinder inlet valve (12) connected to the lower chamber (1) to flush the lower chamber (1) until the discharge is clean. When inspecting the conical filter screen (5) without stopping production, first flush the dirt in the lower chamber (1), then close the control valve core assembly (9) on the middle partition (2), open the lower cylinder inlet valve (12) and lower cylinder outlet valve (17) connected to the lower chamber (1), and use the internal volume space of the lower chamber (1) to achieve gravity sedimentation separation. After disassembling and inspecting the upper chamber (4) in a short time, the normal production process is restored.

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