Filter suitable for self-priming pump

Abstract

The utility model relates to a filter applicable to a self-priming pump, which belongs to the technical field of filters and comprises a lower barrel, a filter screen component and an upper cover, a liquid discharge hole is arranged on the lower portion of the lower barrel, the upper cover is fixedly mounted at the top of the lower barrel through bolts, the filter screen component is arranged inside the lower barrel and mounted at the bottom of the upper cover, and the filter screen component comprises a fixing ring. A filter screen is welded to the bottom of the fixing ring, a notch is machined in the position, corresponding to the inlet pipe, of the upper portion of the filter screen, and a filter screen assembly medium inlet is formed in the notch. A medium inlet of the filter screen assembly is a channel which is located on the upper portion of the filter screen, corresponds to an outlet of the inlet pipe and is defined by a fan-shaped lower baffle on the lower portion, two square side baffles vertically arranged on the two sides in parallel and a top fixing ring, and a medium enters the filter screen through the channel. The self-priming pump inlet pipeline can be prevented from storing air, and the manufacturing process is simpler and more reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and in particular relates to a filter suitable for a self-priming pump. Background Art

[0002] In the modern industrial production process, a large amount of oily wastewater is generated, which is often mixed with a large amount of impurities. In the process of wastewater pumping, in order to prevent oversized particles from entering the pump and blocking the impeller flow channel, causing the self-priming pump to be unable to work normally, a filter is often installed at the inlet pipeline of the pump to filter out impurities in the medium. The medium outlet of the existing filter is lower than the highest point of the filter. This structure makes the gas contained in the sucked medium float up and separate when the equipment is running, and is compressed and gathered at the top of the filter, which is called an air bag. As more and more gas is separated, when the volume of the compressed gas is larger than the volume of the top gas storage part, the compressed gas will expand and rebound to the inlet pipe of the filter, causing flow interruption. The self-priming pump cannot operate normally, which in turn causes dry grinding of the mechanical seal and damage to the equipment.

[0003] In order to solve the above problems, the applicant submitted a utility model patent application for a U-shaped filter suitable for a self-priming pump on February 13, 2023, and it was published on June 6, 2023 (patent number: ZL202320196081.1). The filter provided by this utility model patent solves the problem of air accumulation in the inlet pipeline of the self-priming pump, but the manufacturing process of this filter is complicated, and the strength of the filter medium at the inlet is relatively low, and further improvement is urgently needed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a filter suitable for a self-priming pump, which can prevent air from accumulating in the inlet pipeline of the self-priming pump and has a simpler and more reliable manufacturing process.

[0005] A filter suitable for a self-priming pump comprises a lower cylinder, a filter assembly and an upper cover, wherein a drainage hole is provided at the lower part of the lower cylinder, the upper cover is fixedly mounted on the top of the lower cylinder by means of bolts, an inlet pipe and an outlet pipe are arranged at the upper part of the lower cylinder, and the bottom of the upper cover is flush with the top of the inner wall of the inlet pipe and the outlet pipe; the filter assembly is arranged inside the lower cylinder, the filter assembly is mounted on the bottom of the upper cover, the filter assembly comprises a fixing ring, a filter is welded to the bottom of the fixing ring, a notch is processed at the upper part of the filter corresponding to the inlet pipe, and a medium inlet of the filter assembly is arranged at the notch.

[0006] The medium inlet of the filter assembly is located at the upper part of the filter screen, corresponding to the outlet of the inlet pipe, and is a channel surrounded by a lower fan-shaped lower baffle, two square side baffles arranged vertically and parallel on both sides, and a top fixed ring. The medium enters the filter screen through this channel.

[0007] The lower surface of the fixing ring is flush with the bottom of the upper cover.

[0008] The fixing ring is processed with a plurality of lifting holes in the circumferential direction, and the axial direction of the lifting holes is parallel to the axial direction of the filter screen.

[0009] A sealing gasket is installed between the joint surface of the upper cover and the lower cylinder to prevent leakage of the medium in the filter.

[0010] A certain gap is left between the medium inlet of the filter assembly and the inner hole of the lower cylinder, and the gap is smaller than the size of the impurity particles in the medium.

[0011] A wire plug is installed in the drainage hole.

[0012] The fan-shaped lower baffle is arranged in parallel with the fixing ring.

[0013] The beneficial effects of the utility model are:

[0014] 1. Compared with the original filter, the filter provided by the utility model has a simpler processing technology, reduces the processing cost and processing difficulty, and improves the production efficiency.

[0015] 2. The bottom of the upper cover in the utility model is flush with the top of the inner wall of the inlet pipe and the outlet pipe, and there is no air storage point inside the filter, which can prevent the generation of air pockets, thereby preventing the self-priming pump from stopping due to flow interruption.

[0016] 3. In the utility model, the filter assembly has an additional suction port. Compared with a simple opening on the filter without an additional reinforcement plate, the utility model has a structure in which a lower baffle and two side baffles are welded on the filter, making the filter assembly structure more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view of a filter suitable for a self-priming pump provided by the utility model;

[0018] Figure 2 for Figure 1 AA section view;

[0019] Figure 3 This is a front view of the filter assembly in the utility model;

[0020] Figure 4 It is a side view of the filter assembly in the utility model;

[0021] Figure 5 It is a top view of the filter assembly in the utility model;

[0022] in,

[0023] 1-lower cylinder, 2-upper cover, 3-sealing gasket, 4-screw, 5-bolt, 6-spring washer, 7-filter assembly, 71-filter assembly medium inlet, 711-side baffle, 712-lower baffle, 72-fixing ring, 721-lifting hole, 73-filter, 8-thread plug, 11-inlet pipe, 12-outlet pipe. DETAILED DESCRIPTION

[0024] In order to better explain the present invention and facilitate understanding, the technical scheme and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0025] like Figure 1-2 As shown, a filter suitable for a self-priming pump includes a lower cylinder 1, a filter assembly 7 and an upper cover 2. An inlet pipe 11 and an outlet pipe 12 are arranged on the upper part of the lower cylinder 1. The outlet of the inlet pipe 11 and the inlet of the outlet pipe 12 are flush with the inner hole of the lower cylinder 1. A drainage hole is opened at the lower part of the lower cylinder 1, and a wire plug 8 is installed in the drainage hole. Before cleaning the filter, remove the wire plug 8 and drain the medium in the filter to facilitate the removal of the filter. The upper cover 2 is fixedly installed on the top of the lower cylinder 1 with bolts 5, and a spring pad 6 is arranged between the bolts 5 and the upper cover; the bottom of the upper cover 2 is flush with the top of the inner wall of the inlet pipe 11 and the outlet pipe 12 to prevent air from accumulating on the top of the filter to form an air bag. A sealing gasket 3 is installed between the joint surface of the upper cover 2 and the lower cylinder 1 to prevent leakage of the medium in the filter.

[0026] The filter assembly 7 is arranged inside the lower cylinder 1 and is suspended on the bottom of the upper cover 2 by screws 4 .

[0027] like Figure 3-5 As shown, the filter assembly 7 includes a filter 73, a fixing ring 72 is welded on the top of the filter 73, the inner hole of the fixing ring 72 matches the stopper at the bottom of the upper cover 2, and the lower surface of the fixing ring 72 is flush with the bottom of the upper cover 2 to ensure that the highest point inside the entire filter is flush with the top of the inner wall of the inlet pipe and the outlet pipe to prevent air pockets from forming inside. The fixing ring 72 is processed with several hanging holes 721 in the circumferential direction, and the axial direction of the hanging holes 721 is parallel to the axial direction of the filter 73. The screw 4 passes through the hanging holes 721 on the fixing ring 72 to hang the filter assembly 7 on the bottom of the upper cover 2. A notch is processed on the upper part of the filter 73 at a position corresponding to the inlet pipe 11, and a filter assembly medium inlet 71 is arranged at the notch.

[0028] The medium inlet 71 of the filter assembly is located at the upper part of the filter 73, corresponding to the outlet of the inlet pipe 11, and is a channel surrounded by a lower fan-shaped lower baffle 712, two square side baffles 711 arranged parallel and vertically on both sides, and a top fixed ring 72. The medium enters the filter 73 through this channel; large particles of impurities enter the filter 73 through the medium inlet 71 of the filter assembly and the notch on the filter 73, and remain in the filter 73 under the obstruction of the mesh of the filter 73.

[0029] There is a certain gap between the filter screen assembly medium inlet 71 and the inner hole of the lower cylinder 1, and the gap is smaller than the size of the impurity particles in the medium to ensure that all large impurities in the medium flowing into the inlet pipe 11 enter the filter screen assembly 7.

[0030] The working process of the above-mentioned filter suitable for a self-priming pump is:

[0031] The filter is installed on the inlet pipeline of the self-priming pump, wherein the inlet pipe 11 is located at the liquid storage tank end of the inlet pipeline of the self-priming pump, and the outlet pipe 12 is located at the inlet end of the self-priming pump of the inlet pipeline of the self-priming pump. The medium enters the filter from the inlet pipe 11 of the filter before entering the self-priming pump, and the impurity-containing medium enters the filter 73 from the filter assembly medium inlet 71 of the filter assembly 7. The medium flows out from the outlet pipe 12 of the filter through the mesh of the filter 73, and the impurities contained in the medium that are larger than the mesh of the filter 73 are blocked in the filter 73. When the amount of impurities accumulated in the filter 73 reaches a certain level and the medium flow rate becomes smaller, the self-priming pump is stopped at this time, the wire plug 8 installed in the drainage hole is taken out, the medium in the filter is discharged, the connection between the filter and the inlet pipeline of the self-priming pump is disconnected, and the impurities in the filter 73 are cleaned.

Claims

1. A filter suitable for a self-priming pump, comprising a lower cylinder, a filter assembly and an upper cover, wherein a drainage hole is provided at the lower part of the lower cylinder, the upper cover is fixedly mounted on the top of the lower cylinder by bolts, an inlet pipe and an outlet pipe are provided at the upper part of the lower cylinder, and the bottom of the upper cover is flush with the top of the inner wall of the inlet pipe and the outlet pipe; the filter assembly is arranged inside the lower cylinder, and is characterized in that: The filter assembly is installed at the bottom of the upper cover, and the filter assembly includes a fixing ring, a filter is welded at the bottom of the fixing ring, a notch is processed at the upper part of the filter corresponding to the inlet pipe, and a medium inlet of the filter assembly is arranged at the notch; The medium inlet of the filter assembly is located at the upper part of the filter screen, corresponding to the outlet of the inlet pipe, and is a channel surrounded by a lower fan-shaped lower baffle, two square side baffles arranged vertically and parallel on both sides, and a top fixed ring. The medium enters the filter screen through this channel.

2. A filter suitable for a self-priming pump according to claim 1, characterized in that: The lower surface of the fixing ring is flush with the bottom of the upper cover.

3. A filter suitable for a self-priming pump according to claim 1, characterized in that: The fixing ring is processed with a plurality of lifting holes in the circumferential direction, and the axial direction of the lifting holes is parallel to the axial direction of the filter screen.

4. A filter suitable for a self-priming pump according to claim 1, characterized in that: A sealing gasket is installed between the joint surface of the upper cover and the lower cylinder to prevent leakage of the medium in the filter.

5. A filter suitable for a self-priming pump according to claim 1, characterized in that: A certain gap is left between the medium inlet of the filter assembly and the inner hole of the lower cylinder, and the gap is smaller than the size of the impurity particles in the medium.

6. A filter suitable for a self-priming pump according to claim 1, characterized in that: A wire plug is installed in the drainage hole.

7. A filter suitable for a self-priming pump according to claim 1, characterized in that: The fan-shaped lower baffle is arranged in parallel with the fixing ring.

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