A filter device for a waste liquid extraction pump body

Abstract

The utility model discloses a kind of filtering devices for waste liquid extraction pump body, it is related to waste liquid processing technical field, including main pump liquid inlet pipeline, the filtering structure being set in waste liquid pool, annular cover body and auxiliary pump body, wherein: the liquid outlet of main pump liquid inlet pipeline is communicated with the liquid inlet of waste liquid extraction pump body;The liquid inlet of main pump liquid inlet pipeline is connected in filtering structure;Annular cover body is sleeved in the outer ring side of filtering structure;Annular cover body is provided with opening in one end in liquid inlet direction, and other end is covered with baffle;Baffle is provided with backflow opening communicated with the liquid inlet of auxiliary pump body;The liquid outlet of auxiliary pump body is communicated with waste liquid pool.The filtering device for waste liquid extraction pump body provided by the utility model carries out extraction backflow to waste liquid by setting auxiliary pump body, while not reducing the negative pressure intensity in main pump liquid inlet pipeline, with the help of backflow waste liquid, the surface of filtering structure is washed, and the frequency of effectively reducing filtering structure blockage.

Description

Technical Field

[0001] This utility model relates to the field of waste liquid treatment technology, and in particular to a filtration device for a waste liquid extraction pump body. Background Technology

[0002] In the wastewater treatment process using the Fenton process, the wastewater contains a large number of solid particles, reaction precipitates, and other impurities. Therefore, the pumps used in the treatment equipment need to be equipped with filtration devices to prevent clogging or wear inside the pump. Existing filtration devices are mostly single-screen filter covers, which can achieve basic filtration functions, but impurities easily accumulate on the filter surface, causing rapid clogging of the filter opening, affecting the pump's liquid intake efficiency, and requiring frequent manual disassembly and cleaning, increasing maintenance costs.

[0003] Chinese utility model patent application number 202222141184.6 discloses a filter component for the inlet pipe of a self-priming pump based on a cyclohexanone waste liquid tank. This patent diverts a portion of the waste liquid through a bypass conduit and directs this portion of the waste liquid to flush the filter screen, thereby preventing impurities from clogging the filter screen. However, the negative pressure intensity that the pump can provide is limited. Setting up a bypass conduit diverts the flow rate of the main channel. At the same time, because the diverted flow directly impacts the filter screen, it causes turbulence in the flow field on the surface of the filter screen, resulting in fluctuations in the negative pressure effect, which in turn affects the waste liquid extraction efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a filtration device for a waste liquid extraction pump body. By setting an auxiliary pump body to extract and return the waste liquid in the annular cover, the negative pressure intensity in the main pump inlet pipe is not reduced, and the surface of the filter structure can be flushed by the returned waste liquid, which effectively reduces the frequency of filter structure blockage.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a filtration device for a waste liquid extraction pump, comprising a main pump inlet pipe, a filter structure disposed in a waste liquid tank, an annular cover, and an auxiliary pump body, wherein: the outlet of the main pump inlet pipe is connected to the inlet of the waste liquid extraction pump body; the inlet of the main pump inlet pipe is connected to the filter structure; the annular cover is disposed along the length of the main pump inlet pipe and is fitted onto the outer ring side of the filter structure; the annular cover has an opening at the end facing the inlet direction of the main pump inlet pipe; the annular cover is covered with a baffle at the end facing away from the inlet direction of the main pump inlet pipe; the baffle has a return port; the return port is connected to the inlet of the auxiliary pump body; and the outlet of the auxiliary pump body is connected to the waste liquid tank.

[0006] The filtration device for a waste liquid extraction pump body provided by this utility model preferably includes a filter cylinder and a sealing plate, wherein: the filter cylinder is coaxially arranged with the main pump inlet pipe; a plurality of filter holes are provided on the circumferential side of the filter cylinder; the ports at both ends of the filter cylinder are connected; the port at the first end of the filter cylinder is circumferentially arranged around the outlet of the main pump inlet pipe; and the sealing plate is sealed at the port at the second end of the filter cylinder.

[0007] The filtration device for a waste liquid extraction pump body provided by this utility model preferably has a smaller diameter at the port of the first end of the filter cylinder than at the port of the second end of the filter cylinder; the circumferential side of the filter cylinder is inclined toward the axis of the main pump inlet pipe in the inlet direction of the main pump inlet pipe.

[0008] The filtration device for waste liquid extraction pump body provided by this utility model preferably has the liquid outlet direction of the auxiliary pump body being different from the liquid inlet direction of the main pump inlet pipe.

[0009] The filtration device for waste liquid extraction pump body provided by this utility model preferably includes an auxiliary pump body that is a slurry pump.

[0010] The above technical solution has the following advantages or beneficial effects: The present invention provides a filtration device for a waste liquid extraction pump body, relating to the field of waste liquid treatment technology, including a main pump inlet pipe, a filtration structure disposed in a waste liquid tank, an annular cover, and an auxiliary pump body, wherein: the outlet of the main pump inlet pipe is connected to the inlet of the waste liquid extraction pump body; the inlet of the main pump inlet pipe is connected to the filtration structure; the annular cover is disposed along the length of the main pump inlet pipe and sleeved on the outer ring side of the filtration structure; the annular cover has an opening at one end facing the inlet direction of the main pump inlet pipe; the annular cover is covered with a baffle at one end facing away from the inlet direction of the main pump inlet pipe; the baffle has a return port; the return port is connected to the inlet of the auxiliary pump body; the outlet of the auxiliary pump body is connected to the waste liquid tank. This utility model provides a filtration device for a waste liquid extraction pump body. By setting an auxiliary pump body to extract and return the waste liquid in the annular cover, the negative pressure intensity in the main pump inlet pipe is not reduced, and the surface of the filter structure can be flushed by the returned waste liquid, which effectively reduces the frequency of filter structure blockage. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0012] Figure 1 This is an overall structural diagram of a filtration device for a waste liquid extraction pump body provided in Embodiment 1 of the present invention; Figure 2This is a cross-sectional view of the internal structure of the annular cover of a filter device for a waste liquid extraction pump body provided in Embodiment 1 of this utility model; Figure 1-2 Includes: 1. Main pump inlet pipe; 2. Filter structure; 21. Filter cylinder; 22. Sealing plate; 23. Filter hole; 3. Annular cover; 31. Opening; 32. Baffle; 33. Return port; 4. Auxiliary pump body. Detailed Implementation

[0013] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0014] Example 1: like Figure 1-2 As shown: To provide a portion of fluid to flush the surface of the filter structure 2 without reducing the negative pressure intensity within the main pump inlet pipe 1, thereby removing impurities clogging the filter structure 2, this utility model provides a filtration device for a waste liquid extraction pump body, comprising a main pump inlet pipe 1, a filter structure 2 disposed within a waste liquid tank, an annular cover 3, and an auxiliary pump body 4, wherein: the outlet of the main pump inlet pipe 1 is connected to the inlet of the waste liquid extraction pump body; the inlet of the main pump inlet pipe 1 is connected to the filter structure 2; the annular cover 3 is arranged along the length of the main pump inlet pipe 1 and is fitted onto the outer ring side of the filter structure 2; the annular cover 3 has an opening 31 at the end facing the inlet direction of the main pump inlet pipe 1; the annular cover 3 is covered with a baffle 32 at the end facing away from the inlet direction of the main pump inlet pipe 1; the baffle 32 has a return port 33; the return port 33 is connected to the inlet of the auxiliary pump body 4; and the outlet of the auxiliary pump body 4 is connected to the waste liquid tank.

[0015] When the filtration device for a waste liquid extraction pump body provided by this utility model is in operation, the filtration structure 2 is located in the waste liquid pool. The waste liquid extraction pump body provides negative pressure, causing the waste liquid to enter the main pump inlet pipe 1 after being filtered by the filtration structure 2 and then extracted by the waste liquid extraction pump body. The annular cover 3 is fitted onto the outer ring side of the filtration structure 2, and a flushing chamber is formed inside the annular cover 3. The waste liquid extraction pump body and the auxiliary pump body 4 operate simultaneously. The waste liquid, subjected to negative pressure from the waste liquid extraction pump body and the auxiliary pump body 4, enters the flushing chamber through the opening 31. A portion of the waste liquid is filtered by the filtration structure 2 at the front end of the flushing chamber and enters the main pump inlet pipe 1. The other portion of the waste liquid is pumped back to the waste liquid pool by the auxiliary pump body 4, which is connected to the return port 33 at the rear end of the flushing chamber. During the return process, this portion of waste liquid serves to flush the surface of the filtration structure 2. Furthermore, to avoid excessively low flow rate in the main pump inlet pipe 1, the negative pressure intensity of the waste liquid extraction pump body should be higher than that of the auxiliary pump body 4, and the flushing chamber should have sufficient capacity. Generally, the diameter of the annular cover 3 is more than twice the diameter of the main pump inlet pipe 1.

[0016] The present invention provides a filtration device for a waste liquid extraction pump body. By setting an auxiliary pump body 4 to extract and return the waste liquid in the annular cover 3, the device can effectively reduce the frequency of clogging of the filter structure 2 by using the returned waste liquid without reducing the negative pressure intensity in the main pump inlet pipe 1.

[0017] As a specific implementation of the filter structure 2, in a preferred embodiment, the filter structure 2 includes a filter cylinder 21 and a sealing plate 22, wherein: the filter cylinder 21 is coaxially arranged with the main pump inlet pipe 1; a plurality of filter holes 23 are provided on the circumferential side of the filter cylinder 21; the ports at both ends of the filter cylinder 21 are connected in the axial direction; the port at the first end of the filter cylinder 21 is circumferentially arranged around the outlet of the main pump inlet pipe 1; and the sealing plate 22 seals the port at the second end of the filter cylinder 21. Waste liquid enters the main pump inlet pipe 1 through the filter holes 23 on the circumferential side of the filter cylinder 21, and impurities in the waste liquid larger than the aperture of the filter holes 23 are intercepted on the circumferential side of the filter cylinder 21. Since the waste liquid enters the annular cover 3 along the axial direction of the main pump inlet pipe 1, in order to have a sufficient flow of waste liquid for rinsing the filter cylinder 21, the filter holes 23 are only provided on the circumferential side of the filter cylinder 21. This allows the waste liquid to flow axially along the main pump inlet pipe 1 through the filter cylinder 21 and directly enter the interior of the filter cylinder 21, while there is still enough waste liquid that does not enter the filter cylinder 21 to flush the surface of the filter cylinder 21.

[0018] In the above-described scheme, the filter cylinder 21 is generally implemented as a cylindrical structure. Under this structural condition, the flow direction of the waste liquid is perpendicular to the axial direction of the filter hole 23. When impurity particles are blocked in the filter hole 23, since the impurity particles are partially embedded in the filter hole 23, the waste liquid flowing in a relatively perpendicular direction cannot exert a force along the axial direction of the filter hole 23 on the impurity particles, resulting in poor flushing effect. In order to solve the above-mentioned technical problem, in a preferred embodiment, the diameter of the port at the first end of the filter cylinder 21 is smaller than the diameter of the port at the second end of the filter cylinder 21; the peripheral surface of the filter cylinder 21 is inclined towards the axis of the main pump inlet pipe 1 in the inlet direction of the main pump inlet pipe 1. In this preferred embodiment, the filter cylinder 21 has an overall truncated cone structure. Since the peripheral side of the filter cylinder 21 is inclined towards the axis of the main pump inlet pipe 1, the angle between the axial direction of the filter hole 23 and the direction of waste liquid flow is acute. This allows the waste liquid to exert a component force perpendicular to the axial direction of the filter hole 23 on the impurity particles in the filter hole 23, which helps to flush the impurity particles out of the filter hole 23 and solve the problem of impurity blockage.

[0019] In order to avoid the backflow waste liquid discharged from the auxiliary pump body 4 causing turbulence to the waste liquid entering the annular cover body 3, in a preferred embodiment, the liquid discharge direction of the auxiliary pump body 4 is different from the liquid inlet direction of the main pump inlet pipe 1.

[0020] Since the returned waste liquid is unfiltered, it still contains impurities. Therefore, the selected pump should be suitable for pumping fluids with a high proportion of particulate matter. In a preferred embodiment, the auxiliary pump 4 is a slurry pump.

[0021] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application filed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

[0022] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A filtration device for a waste liquid extraction pump body, characterized in that, This includes the main pump inlet pipe, a filter structure installed in the waste liquid tank, an annular cover, and an auxiliary pump body, wherein: The outlet of the main pump inlet pipe is connected to the inlet of the waste liquid extraction pump body. The inlet of the main pump inlet pipe is connected to the filter structure; The annular cover is arranged along the length of the main pump inlet pipe and is fitted onto the outer ring side of the filter structure; The annular cover has an opening at one end facing the liquid inlet direction of the main pump inlet pipe; The annular cover has a baffle at one end facing away from the liquid inlet direction of the main pump inlet pipe; The baffle is provided with a return port; The return port is connected to the liquid inlet of the auxiliary pump body; The outlet of the auxiliary pump is connected to the waste liquid tank.

2. The filtration device for a waste liquid extraction pump body according to claim 1, characterized in that, The filter structure includes a filter cylinder and a sealing plate, wherein: The filter cylinder is coaxially arranged with the main pump inlet pipe; The filter cylinder has several filter holes on its peripheral side. The ports at both ends of the filter cylinder are connected. The port at the first end of the filter cylinder is circumferentially arranged around the outlet of the main pump inlet pipe; The sealing plate is used to seal the port at the second end of the filter cylinder.

3. The filtration device for a waste liquid extraction pump body according to claim 2, characterized in that, The diameter of the port at the first end of the filter cylinder is smaller than the diameter of the port at the second end of the filter cylinder; the circumferential surface of the filter cylinder is inclined toward the axis of the main pump inlet pipe in the inlet direction of the main pump inlet pipe.

4. The filtration device for a waste liquid extraction pump body according to claim 1, characterized in that, The discharge direction of the auxiliary pump body is different from the inlet direction of the main pump inlet pipe.

5. The filtration device for a waste liquid extraction pump body according to claim 1, characterized in that, The auxiliary pump body is a slurry pump.

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