Fluid pump with filter screen convenient to replace

Abstract

According to the technical scheme, the fluid pump convenient to replace the filter screen is characterized in that the fluid pump comprises a pump shell, the filter screen arranged in the pump shell and close to the input end of the pump shell and a driving assembly connected with the pump shell, and the pump shell comprises a rear shell body connected with the driving assembly and a front shell body spliced with the rear shell body; the front shell is provided with a replacement opening allowing the filter screen to penetrate through and two front sliding blocks which are connected with the edge of an opening of the replacement opening and distributed up and down, the front shell is provided with a side cover capable of covering the replacement opening, and the rear shell is provided with a limiting groove allowing the filter screen to be locally inserted and two rear sliding blocks which are connected with the edge of an opening of the limiting groove and distributed up and down. The distance between the groove bottom of the limiting groove and the side cover is matched with the width of the filter screen, the two front sliding blocks correspond to the two rear sliding blocks respectively, the opposite faces of the two front sliding blocks are flush with the opposite faces of the two rear sliding blocks respectively, the rear sliding block and the front sliding block on the same side abut against one end of the filter screen, and the problem that in the prior art, the filter screen is difficult to replace is solved.

Description

Technical Field

[0001] This utility model relates to the field of fluid pump technology, and more specifically to a fluid pump with an easy-to-replace filter screen. Background Technology

[0002] A fluid pump is a machine used to increase the pressure of a liquid, enabling it to flow. It is a device used to move liquids. To prevent impurities from entering the pump and causing blockages, existing fluid pumps are equipped with filters. Most existing fluid pumps are manufactured by splitting the casing in half. During assembly, the filter is installed in one half of the casing, and then the other half is fitted over the filter and securely connected or welded to the first half. The filter is positioned inside the casing. Over time, the filter will become clogged, affecting the flow of liquid. Replacing the filter requires disassembling or replacing the entire fluid pump, which presents problems such as difficulty in replacing the filter or high operating costs of the fluid pump. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a fluid pump that makes it easy to replace the filter screen.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fluid pump for easy filter replacement, comprising a pump housing, a filter screen built into the pump housing and adjacent to the pump housing input end, and a drive assembly connected to the pump housing. The pump housing includes a rear housing connected to the drive assembly and a front housing assembled with the rear housing. The front housing is provided with a replacement port for the filter screen to pass through and two front sliders connected to the edge of the replacement port opening and distributed vertically. The front housing is provided with a side cover that can cover the replacement port. The rear housing is provided with a limiting groove for partial insertion of the filter screen and two rear sliders connected to the edge of the limiting groove opening and distributed vertically. The distance between the bottom of the limiting groove and the side cover matches the width of the filter screen. The two front sliders correspond to the two rear sliders respectively, and the facing surfaces of the two front sliders are flush with the facing surfaces of the two rear sliders. The rear sliders and front sliders on the same side both contact one end of the filter screen. The filter screen can be removed from the pump housing by removing the side cover.

[0005] As a further improvement of this utility model, the two ends of the limiting groove are arc-shaped and can slide relative to the two ends of the filter screen, and the surfaces of the two front sliders and the two rear sliders that contact the ends of the filter screen are all arc-shaped.

[0006] As a further improvement of this utility model, the limiting groove is inclined relative to the vertical plane and tends to move away from the output end of the pump casing.

[0007] As a further improvement of this utility model, the filter screen is wavy or serrated in its length direction.

[0008] As a further improvement of this utility model, the filter screen is provided with two curved grooves that are respectively close to both ends of the filter screen, and the side cover is provided with two support rods that can be inserted into the grooves and can move linearly along the grooves on the surface facing the rear housing.

[0009] The beneficial effects of this utility model are as follows: by removing the side cover, the filter screen can be moved out of the pump housing. Compared with the prior art, this design allows the filter screen to be replaced without disassembling the entire pump housing, only by partially disassembling the front housing. The disassembly difficulty is low and the replacement efficiency is improved. The limiting groove provides an auxiliary positioning function for the filter screen, ensuring that the filter screen is accurately positioned in the pump housing. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0011] Figure 2 This is an exploded view of the present invention after removing the drive component;

[0012] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0013] Figure 4 This is an exploded view of the pump casing in this utility model.

[0014] Reference numerals: 1. Pump housing; 11. Rear housing; 111. Limiting groove; 112. Rear slider; 12. Front housing; 121. Replacement port; 122. Front slider; 13. Side cover; 14. Support rod; 2. Filter screen; 21. Slide groove; 3. Drive assembly. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.

[0016] Reference Figures 1 to 4 As shown, a fluid pump with easy filter replacement in this embodiment includes a pump housing 1, a filter 2 built into the pump housing 1 and near the input end of the pump housing 1, and a drive assembly 3 connected to the pump housing 1. The pump housing 1 includes a rear housing 11 connected to the drive assembly 3 and a front housing 12 assembled with the rear housing 11.

[0017] Based on the aforementioned prior art, a replacement port 121 for the filter screen 2 to pass through is opened on the front housing 12, and a limiting groove 111 corresponding to the replacement port 121 is opened on the rear housing 11. The opening contours of the limiting groove 111 and the replacement port 121 are the same. Two rear sliders 112 and two front sliders 122 are respectively provided on the facing surfaces of the rear housing 11 and the front housing 12. The facing surfaces of the two rear sliders 112 are respectively connected to the two end edges of the limiting groove 111. The two front sliders 122 are respectively corresponding to the two rear sliders 112. The facing surfaces of the two front sliders 122 are connected to the two end edges of the replacement port 121. The contour size of the side cover 13 is larger than the opening contour size of the replacement port 121 and can be positioned on the front housing 12 by bolt fastening.

[0018] During assembly, the front housing 12 and the rear housing 11 are fixedly connected together. At this time, the distance between the bottom of the limiting groove 111 and the opening of the replacement port 121 on the outer wall of the front housing 12 matches the width of the filter screen 2. The two front sliders 122 are respectively in close contact with the two rear sliders 112, and the facing surfaces of the two front sliders 122 are respectively flush with the facing surfaces of the two rear sliders 112. Then, the filter screen 2 is passed through the replacement port 121 and moved into the pump housing 1. The rear sliders 112 and the front sliders 122 on the same side abut against the same end of the filter screen 2 to form a hard seal. At the same time, the filter screen 2 partially extends into the limiting groove 111 and abuts against the bottom of the limiting groove 111 to form a hard seal. The two ends of the filter screen 2 located in the limiting groove 111 are... The filter screen 2 forms a hard seal by contacting the inner walls of both ends of the limiting groove 111. The two ends of the filter screen 2 located inside the replacement port 121 also form a hard seal by contacting the inner walls of both ends of the replacement port 121. Finally, the side cover 13 is placed over the replacement port 121 and fastened to the front housing 12 with bolts. The end face of the side cover 13 facing the rear housing 11 is in contact with the edge of the filter screen 2 to form a hard seal. To ensure sealing, a soft sealing layer can be added between the side cover 13 and the front housing 12. The sealing layer is in contact with the edge of the filter screen 2 to form a soft seal. If the filter screen 2 needs to be replaced, the drive assembly 3 is stopped, the side cover 13 is opened and the failed filter screen 2 is removed. After replacing the new filter screen 2, the side cover 13 is put back on the front housing 12.

[0019] Compared with existing technologies, this design allows for the replacement of the filter screen 2 by only partially disassembling the front housing 12 without disassembling the entire pump housing 1. This reduces disassembly difficulty and improves replacement efficiency. The limiting groove 111 provides an auxiliary positioning function for the filter screen 2, ensuring that the filter screen 2 is accurately positioned within the pump housing 1.

[0020] As an improved specific implementation, because the filter screen 2 will bend and deform under the high-speed impact of the liquid, the two ends of the filter screen 2 will separate from the corresponding sliders, creating gaps and resulting in a poor filtration effect; furthermore, due to processing errors, it is impossible to ensure that the length of the filter screen 2 matches the length of the limiting groove 111, thus causing the two ends of the filter screen 2 to fail to form a hard seal with the pump housing 1 simultaneously, resulting in a poor filtration effect. To solve the aforementioned two problems, refer to Figure 2 and Figure 4 As shown, the inner walls of both ends of the limiting groove 111 are designed to be arc-shaped, and the inner walls of both ends of the replacement port 121 are also arc-shaped. At the same time, the facing surfaces of the two front sliders 122 and the facing surfaces of the two rear sliders 112 are processed in the same way to form arc surfaces. The two ends of the filter screen 2 respectively contact the corresponding arc surfaces. During use, the filter screen 2 undergoes slight movement and deformation under the impact of the liquid, so the two ends of the filter screen 2 slide relative to the contacting arc surfaces. Finally, the filter screen 2 remains stationary. This design allows for fine adjustment of the position of the filter screen 2 in the pump housing 1, thereby ensuring that the two ends of the filter screen 2 fully contact the corresponding arc surfaces to form an effective hard seal, ensuring the stability of the filtration effect.

[0021] As one specific implementation method of the improvement, refer to Figure 2 As shown, the limiting groove 111 is inclined relative to the vertical plane and tends to move away from the output end of the pump housing 1. After assembly, the filter screen 2 can move to a certain position in the limiting groove 111 under the action of gravity. At the same time, both ends of the filter screen 2 are always in contact with the corresponding arc surface, thereby preventing impurities from leaking to subsequent positions. During use, the liquid not only exerts an impact force on the filter screen 2 but also has a downward gravity. This design can ensure the positional stability of the filter screen 2 during the liquid flow process and effectively prevent the filter screen 2 from easily shifting with the change of liquid flow.

[0022] As one specific implementation method of the improvement, refer to Figure 2 and Figure 4 As shown, the filter screen 2 is formed by bending a single sheet into a wavy or serrated shape, and the width of the limiting groove 111 also changes accordingly. Compared with the sheet-shaped filter screen 2, this design effectively increases the filtration area of ​​the filter screen 2, improves the filtration effect, and extends the service life of the filter screen 2.

[0023] As one specific implementation of the improvement, because the bent filter screen 2 shrinks towards the middle when impacted by liquid, causing the two ends of the filter screen 2 to separate from the corresponding surfaces, ultimately resulting in a decrease in filtration efficiency, to solve the aforementioned problem, refer to... Figure 2 and Figure 3As shown, grooves 21 are further stamped on the sheets located at both ends of the filter screen 2. The two grooves 21 protrude towards the adjacent sliders. Two support rods 14 are integrally formed on the side cover 13 facing the rear housing 11. They can be inserted into the grooves 21 and can move linearly along the grooves 21. When the filter screen 2 is impacted by liquid, the sheets at both ends of the filter screen 2 slide relative to the support rods 14. The support rods 14 move from one end of the groove 21 to the other end of the groove 21. The two ends of the filter screen 2 are stretched open and come into close contact with the corresponding surfaces. This design can suppress the movement of the filter screen 2 contracting towards the center, ensuring the filtration effect of the filter screen 2. At the same time, the support rods 14 provide support for the filter screen 2, indirectly improving the impact resistance of the filter screen 2.

[0024] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A fluid pump with a replaceable filter screen, comprising a pump housing (1), a filter screen (2) built into the pump housing (1) and adjacent to the input end of the pump housing (1), and a drive assembly (3) connected to the pump housing (1), wherein the pump housing (1) includes a rear housing (11) connected to the drive assembly (3) and a front housing (12) assembled with the rear housing (11), characterized in that: The front housing (12) is provided with a replacement port (121) through which the filter screen (2) passes and two front sliders (122) that are connected to the edge of the opening of the replacement port (121) and distributed vertically. The front housing (12) is provided with a side cover (13) that can cover the replacement port (121). The rear housing (11) is provided with a limiting groove (111) for partial insertion of the filter screen (2) and two rear sliders (112) that are connected to the edge of the opening of the limiting groove (111) and distributed vertically. The distance between the bottom of the limiting groove (111) and the side cover (13) matches the width of the filter screen (2). The two front sliders (122) correspond to the two rear sliders (112) respectively, and the facing surfaces of the two front sliders (122) are flush with the facing surfaces of the two rear sliders (112). The rear sliders (112) and the front sliders (122) on the same side are both in contact with one end of the filter screen (2). The filter screen (2) can be moved out of the pump housing (1) by removing the side cover (13).

2. A fluid pump with an easily replaceable filter screen according to claim 1, characterized in that: The two ends of the limiting groove (111) are arc-shaped and can slide relative to the two ends of the filter screen (2). The surfaces of the two front sliders (122) and the two rear sliders (112) that touch the end of the filter screen (2) are all arc-shaped.

3. A fluid pump with an easily replaceable filter screen according to claim 2, characterized in that: The limiting groove (111) is inclined relative to the vertical plane and tends to move away from the output end of the pump casing (1).

4. A fluid pump with an easily replaceable filter screen according to claim 1, 2, or 3, characterized in that: The filter screen (2) is wavy or serrated in its length direction.

5. A fluid pump with an easily replaceable filter screen according to claim 4, characterized in that: The filter screen (2) is provided with two curved grooves (21) that are adjacent to both ends of the filter screen (2). The side cover (13) is provided with two support rods (14) on the surface facing the rear housing (11), which can be inserted into the grooves (21) and can move linearly along the grooves (21).

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