A kind of submersible sewage pump water inlet debris filtering device

Abstract

The utility model relates to pump valve field especially a kind of sundry filtering device for silt pump water inlet, including coarse filter screen, coarse filter screen edge is connected with pump body water inlet flange bolt;Nylon fiber intercepting screen is nested in the inside of coarse filter screen;Pressure sensing device is installed in the inside of nylon fiber intercepting screen, and is fixedly connected with coarse filter screen, sensor probe is towards filter screen direction, and the pressure data of silt pump water inlet end is collected by pressure sensor, whether the filtering device needs to be cleaned is judged. The device can intuitively judge the condition of under-water filtering device intercepting impurities by pressure sensor, which is convenient for reasonable arrangement of maintenance and cleaning time, reduces maintenance time and capital cost, reduces the failure frequency of silt pump, saves repair cost;It can also improve the impurity filtering efficiency, more impurities are intercepted, the degree of silt pump impeller erosion and wear is reduced, and the service life of silt pump impeller is improved.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment, and in particular to a debris filtration device for the inlet of a submersible sewage pump. Background Technology

[0002] Existing submersible sewage pump impurity filtration devices require more frequent maintenance and cleaning of the underwater filter screen because the amount of impurities trapped cannot be observed routinely. This increases maintenance time and financial costs. Furthermore, if the filter screen traps too much impurity and is not cleaned in time, the water pressure at the pump's inlet will increase, affecting the pump's lifespan and increasing the likelihood of failure. Utility Model Content

[0003] The purpose of this invention is to solve the problems of traditional submersible sewage pump impurity filtration devices, which cannot determine the impurity interception status of underwater filter screens, requiring frequent lifting of the submersible sewage pump from the water to the ground for cleaning and maintenance; and the limited filtration capacity, which can only intercept larger impurities, while other sizes of impurities cannot be effectively filtered. This invention provides a debris filtration device for the inlet of a submersible sewage pump.

[0004] The above-mentioned technical problems are solved by the following technical solutions: A debris filtration device for the inlet of a submersible sewage pump, comprising: A coarse filter screen, the edge of which is bolted to the pump body inlet flange. Nylon fiber mesh, nested inside a coarse filter screen; The pressure sensor is installed inside the nylon fiber interception mesh and is fixedly connected to the coarse filter screen. The sensor probe faces the filter screen and collects the pressure data at the inlet of the submersible pump to determine whether the filter needs to be cleaned.

[0005] Further technology of this utility model: Preferably, the coarse filter screen has a pore size of 15-20 mm, and the nylon fiber interceptor screen has a pore size of 3-5 mm.

[0006] Preferably, the coarse filter screen is in the shape of a "trumpet mouth", and the end face that is bolted to the pump body inlet flange is the smaller end face.

[0007] Preferably, the nylon fiber interceptor is installed inside the coarse filter in a "drawer-style" manner.

[0008] Preferably, the nylon fiber interceptor has a built-in cylindrical frame that supports the nylon fiber interceptor. The bottom of the cylindrical frame is bolted to the inner bottom of the coarse filter.

[0009] Preferably, the outer wall of the top of the cylindrical frame is fitted with a clearance to the inner wall of the small opening end face of the coarse filter screen.

[0010] The beneficial effects of this utility model are as follows: This device can intuitively determine the situation of impurities intercepted by the underwater filter through a pressure sensor, which makes it easier to reasonably arrange maintenance and cleaning time, reduce maintenance time and financial costs, reduce the frequency of submersible pump failures, and save maintenance costs.

[0011] Improving impurity filtration efficiency means intercepting more impurities, which reduces the degree of erosion and wear on the submersible sewage pump impeller and extends its service life. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein: Figure 1 This is a schematic diagram of a debris filtration device for the inlet of a submersible sewage pump.

[0013] Figure 2 This is a schematic diagram of a coarse filter screen.

[0014] The components include: 1. Pump body; 2. Flange; 3. Coarse filter screen; 4. Nylon fiber interception mesh; 5. Pressure sensing device; 6. Cylindrical frame; 7. Bolts. Detailed Implementation

[0015] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0016] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0017] like Figure 1-2 This embodiment provides a debris filtration device for the inlet of a submersible sewage pump, comprising: The coarse filter screen 3 is bolted to the inlet flange 2 of the pump body 1 for easy disassembly and cleaning; the coarse filter screen 3 has a pore size of 15-20mm, which can initially intercept large debris such as tree branches and plastic.

[0018] Nylon fiber mesh 4 is nested inside the coarse filter 3; the pore size of the nylon fiber mesh 4 is 3-5mm, mainly filtering medium-sized debris such as hair and plastic bag fragments.

[0019] Pressure sensing device 5 is installed inside the nylon fiber interceptor mesh 4 and is fixedly connected to the coarse filter mesh 3. The sensor probe faces the filter mesh. The pressure sensor collects the pressure data at the inlet of the submersible pump to determine whether the filter needs cleaning. It should be noted that the pressure sensing device can be a wired or wireless sensor. The wired sensor cable extends from the mesh of the coarse filter mesh 3 and connects to the signal receiving system.

[0020] In this embodiment, the coarse filter screen 3 is in the shape of a "trumpet mouth" to increase the water inlet area and reduce water flow resistance. The end face that is connected to the pump body 1 water inlet flange 2 bolt 7 is the small end face.

[0021] The nylon fiber interception net 4 is built into the coarse filter 3 in a "drawer-style" manner, which can be pulled out and cleaned separately without damaging the coarse filter 3, thus improving maintenance efficiency.

[0022] Furthermore, in the above embodiments, the nylon fiber interceptor mesh 4 is prone to deformation and shrinkage under the impact of water flow. In order to maintain the filtration effect of the nylon fiber interceptor mesh 4, a cylindrical frame 6 is built into the nylon fiber interceptor mesh 4. The cylindrical frame 6 expands the nylon fiber interceptor mesh 4, so that the nylon fiber interceptor mesh 4 is always in an unfolded state. It should be noted that the cylindrical frame 6 is a stainless steel hollow frame, which does not affect the filtration effect of the nylon fiber interceptor mesh 4. The bottom of the cylindrical frame 6 is connected to the inner bottom of the coarse filter screen 3 by bolts 7. It is built into the coarse filter screen 3 in a "drawer-like" manner and directly connected by bolts 7 (it should be noted that there are screw holes at the bottom of the cylindrical frame 6 and threaded grooves on the inner wall of the bottom of the coarse filter screen 3 for bolt connection), so it will not fall off.

[0023] The outer top wall of the cylindrical frame 6 is fitted with the inner side wall of the small opening end face of the coarse filter screen 3 with a clearance. The clearance is controlled within 1-2 mm.

[0024] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways, as long as they do not depart from the scope of this utility model.

Claims

1. A debris filtration device for the inlet of a submersible sewage pump, characterized in that, include: A coarse filter screen, the edge of which is bolted to the pump body inlet flange. Nylon fiber mesh, nested inside a coarse filter screen; The pressure sensor is installed inside the nylon fiber interception mesh and is fixedly connected to the coarse filter screen. The sensor probe faces the filter screen and collects the pressure data at the inlet of the submersible pump to determine whether the filter needs to be cleaned.

2. The submersible sewage pump inlet debris filtration device as described in claim 1, characterized in that: The coarse filter screen has a pore size of 15-20 mm, and the nylon fiber interception screen has a pore size of 3-5 mm.

3. The submersible sewage pump inlet debris filtration device as described in claim 1, characterized in that: The coarse filter screen is shaped like a "trumpet mouth", and the end face that is bolted to the inlet flange of the pump body is the smaller end face.

4. The submersible sewage pump inlet debris filtration device as described in claim 3, characterized in that: The nylon fiber interception mesh is built into the coarse filter in a "drawer-style" manner.

5. The submersible sewage pump inlet debris filtration device as described in claim 4, characterized in that: The nylon fiber interception net has a built-in cylindrical frame, which supports the nylon fiber interception net. The bottom of the cylindrical frame is bolted to the inner bottom of the coarse filter net.

6. The submersible sewage pump inlet debris filtration device as described in claim 5, characterized in that: The outer wall of the top of the cylindrical frame is fitted with a clearance between it and the inner wall of the small opening end face of the coarse filter screen.

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