A bottom valve with a quick-mounting screen

Abstract

This utility model relates to the field of bottom valve design technology and discloses a bottom valve with a quick-release mesh cover. It includes a valve body, a valve cover located at the inlet of the valve body, and a mesh cover for wrapping around the valve cover. The mesh cover is a long strip of flexible filter mesh for winding around the valve cover. After the flexible filter mesh is wound around the valve cover, its ends are stacked together. Multiple inlet holes are evenly spaced along the side wall of the valve cover. A swing arm, hinged to the valve cover at one end, is provided on the valve cover. A pressure rod is provided on the inner wall of the swing arm to press the stacked ends of the flexible filter mesh together. A pressure groove is provided on the outer wall of the valve cover for the pressure rod to be inserted. A locking assembly is provided between the swing arm and the valve cover to lock the position of the swing arm after it is pressed. When the mesh cover needs to be removed, simply unlock the locking assembly and move the swing arm upwards to remove the flexible filter mesh from the valve cover.

Description

Technical Field

[0001] This utility model belongs to the field of bottom valve design technology, and specifically relates to a bottom valve with a quick-installation mesh cover. Background Technology

[0002] Foot valves can be classified into above-water foot valves and underwater foot valves according to their installation location. Underwater foot valves are check valve devices installed at the bottom of the water pump suction pipe, mainly used to prevent liquid backflow and ensure unidirectional flow.

[0003] Currently, Chinese patent publication number CN223233470U, published on August 19, 2025, discloses a bottom valve filter device for a sewage pump, comprising: a valve body, with a valve cover connected to the bottom flange of the valve body; a guide assembly, which is fixedly connected to the inner wall of the valve body by a support frame, and a valve stem runs through the inside of the guide assembly, with a pressure plate integrally formed at the bottom of the valve stem, and a valve disc connected to the bottom of the pressure plate by bolts; and a valve seat, which is pressed between the valve body and the valve cover flange, and a valve disc is inserted into the inside of the valve seat.

[0004] The valve body in this type of sewage pump bottom valve filter device is an underwater bottom valve structure. The valve cover and the valve body are fixedly connected by multiple bolts. The valve cover plays a filtering role. If it is necessary to replace the valve cover with a different filtration capacity according to the size of the filtered particles, the entire valve cover needs to be removed and replaced, which makes the disassembly and assembly of the valve cover more troublesome and costly. Utility Model Content

[0005] The purpose of this invention is to provide a bottom valve with a quick-installation mesh cover, which facilitates convenient installation and removal of the mesh cover.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a bottom valve with a quick-installation mesh cover, comprising a valve body, a valve cover disposed at the inlet of the valve body, and a mesh cover for wrapping around the valve cover. The mesh cover is a long strip-shaped flexible filter screen plate for winding around the valve cover. After the flexible filter screen plate is wound around the valve cover, the ends of the flexible filter screen plate are stacked together. The side wall of the valve cover is provided with a plurality of water inlet holes evenly spaced along the valve cover. The valve cover is provided with a swinging pressure arm with one end hinged to the valve cover. The inner wall of the swinging pressure arm is provided with a pressure rod for pressing the stacked position of the ends of the flexible filter screen plate. The outer wall of the valve cover is provided with a pressure groove for the pressure rod to be embedded. A locking assembly is provided between the swinging pressure arm and the valve cover for locking the position after the swinging pressure arm is pressed.

[0007] A further feature of this invention is that: L-shaped guide rails with flexible filter screens embedded on the outer periphery of the valve cover at both the upper and lower ends are provided.

[0008] A further feature of this invention is that the locking assembly includes an arc-shaped groove formed on the inner side of the swing arm and with its end communicating with the outside, a locking plate embedded in the arc-shaped groove and with its end for embedding in the guide rail, a strip-shaped hole formed on the outer wall of the swing arm and communicating with the arc-shaped groove, and a drive arm disposed on the locking plate and passing through the strip-shaped hole.

[0009] A further feature of this invention is that a drive plate is provided on the side of the drive arm away from the locking plate.

[0010] A further feature of this invention is that the outer wall of the drive slide plate is provided with anti-slip stripes.

[0011] A further feature of this invention is that the end of the locking slide plate is provided with a guide arc surface.

[0012] A further feature of this invention is that the arc-shaped groove is provided in two places, each corresponding to one of the positions of a guide rail.

[0013] In summary, this utility model has the following beneficial effects:

[0014] 1. When installing the mesh cover, the flexible filter screen, which is a long strip, is used to wrap around the valve cover. The flexible filter screen is rolled up at the rear end of the valve cover and overlapped with the position of the swing arm. Then, the swing arm is pressed down, causing the pressure rod to press the flexible filter screen into the groove. The locking assembly is then used to lock the position of the swing arm, thus ensuring the flexible filter screen is stably wrapped around the valve cover. When removing the mesh cover, simply unlock the locking assembly and move the swing arm upwards to remove the flexible filter screen from the valve cover. This allows for convenient installation and removal of the mesh cover, facilitating replacement and cleaning. It also allows for the replacement of mesh covers with different filtration capacities based on the size of the filtered particles; for applications requiring high water quality, a mesh cover with smaller mesh openings can be used.

[0015] 2. When the flexible filter screen is rolled around the valve cover, the side of the flexible filter screen is embedded in the guide rail, thereby positioning the flexible filter screen through the guide rail, which further facilitates the stable wrapping of the flexible filter screen around the valve cover.

[0016] 3. After the pressure bar of the swing arm presses the flexible filter screen into the pressure groove, the driving arm drives the locking slide plate in the arc-shaped groove, so that the end of the locking slide plate is embedded in the guide rail. Since the flexible filter screen has a certain elasticity, the restoring force generated by the pressure on the flexible filter screen will drive the swing arm to swing outward, so that the end of the locking slide plate is pressed against the inner wall of the guide rail. The position of the locking slide plate in the guide rail can be positioned by the friction between the locking slide plate and the inner wall of the guide rail, and finally the position of the swing arm can be locked.

[0017] 4. By using a drive plate located on the side of the drive arm away from the locking plate, the drive plate can easily move the locking plate.

[0018] 5. The anti-slip stripes on the outer wall of the drive skateboard also serve to prevent slipping;

[0019] 6. The guide arc surface at the end of the locking slide plate can guide the locking slide plate as it is embedded in the guide rail, which is conducive to the smooth embedding of the locking slide plate into the guide rail.

[0020] 7. Two locking slides are embedded in the guide rails on the upper and lower sides respectively, which helps to stably lock the swing arm. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a structural schematic diagram of the present invention, in which the flexible filter screen is shown in an exploded view;

[0024] Figure 3 This is a magnified view of a portion of the structure located at the locking slide plate position in this utility model;

[0025] Figure 4 This is a partial structural cross-sectional view of the locking slide plate position in this utility model;

[0026] Figure 5 This is a partial structural cross-sectional view of the swing arm position in this utility model.

[0027] In the diagram, 1 is the valve body; 2 is the valve cover; 21 is the water inlet; 22 is the pressure groove; 23 is the guide rail; 3 is the flexible filter screen; 4 is the swing pressure arm; 41 is the pressure rod; 5 is the locking assembly; 51 is the arc-shaped slide groove; 52 is the locking slide plate; 521 is the guide arc surface; 53 is the strip hole; 54 is the drive arm; 541 is the drive slide plate; and 542 is the anti-slip stripe. Detailed Implementation

[0028] The technical solutions in the embodiments will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] A bottom valve with a quick-installation mesh cover, see reference. Figure 1 , Figure 2 , Figure 3 The bottom valve with a quick-installation mesh cover includes a valve body 1, a valve cover 2, and a mesh cover. The internal structure of the valve body 1 is existing technology, so its specific internal structure will not be described here. The valve cover 2 is welded to the inlet of the valve body 1, and multiple inlet holes 21 are evenly spaced along the side wall of the valve cover 2. The mesh cover is wrapped around the valve cover 2. This mesh cover is a long strip and is used to wrap a flexible filter screen 3 around the valve cover 2. After the flexible filter screen 3 is wrapped around the valve cover 2, the ends are stacked together. This flexible filter screen 3 is made of spring steel. At the same time, guide rails 23 are integrally provided on the outer wall of the valve cover 2 at both the upper and lower ends. The cross-section of the guide rail 23 is L-shaped and the inner side is for the side of the flexible filter screen 3 to be embedded.

[0030] Reference Figure 3 , Figure 4 , Figure 5The valve cover 2 is also provided with a swinging pressure arm 4, one end of which is hinged to the valve cover 2. A pressure rod 41 is welded to the inner wall of the swinging pressure arm 4 to press the overlapping position of the flexible filter screen 3 ends together. A pressure groove 22 is provided on the outer wall of the valve cover 2 for the pressure rod 41 to be inserted. A locking assembly 5 is provided between the swinging pressure arm 4 and the valve cover 2 to lock the position of the swinging pressure arm 4 after it is pressed. This locking assembly 5 includes an arc-shaped slide groove 51, a locking slide plate 52, a strip hole 53, and a drive arm 54. The arc-shaped slide groove 51 is located inside the swinging pressure arm 4 and its end communicates with the outside. Two arc-shaped grooves 51 are provided, each corresponding to one of the two guide rails 23. Meanwhile, the locking slide plate 52 is embedded in the arc-shaped groove 51 and its end is used to be embedded in the guide rail 23. The end of the locking slide plate 52 is also provided with a guide arc surface 521. The strip hole 53 is opened on the outer wall of the swing pressure arm 4 and communicates with the arc-shaped groove 51. The drive arm 54 is welded to the locking slide plate 52 and passes through the strip hole 53. Meanwhile, the side of the drive arm 54 away from the locking slide plate 52 is integrally provided with a drive slide plate 541. The outer wall of the drive slide plate 541 is also provided with anti-slip stripes 542.

[0031] Principle: When a mesh cover needs to be installed, a long, flexible filter screen 3 is used to wrap around the valve cover 2. The flexible filter screen 3 is wrapped around the rear end of the valve cover 2 and stacked together. The side of the flexible filter screen 3 is embedded in the guide rail 23, and the stacking position corresponds to the position of the swing arm 4. Then, the swing arm 4 is pressed down, causing the pressure rod 41 of the swing arm 4 to press the flexible filter screen 3 into the pressure groove 22. Then, the driving slide plate 541 and the driving arm 54 drive the locking slide plate 52 in the arc-shaped slide groove 51, so that the end of the locking slide plate 52 is embedded in the guide rail 23. Since the flexible filter screen 3 has a certain elasticity, the restoring force generated by the pressure on the flexible filter screen 3 will... The swinging pressure arm 4 is driven to swing outward, causing the end of the locking slide plate 52 to press against the inner wall of the guide rail 23. The friction between the locking slide plate 52 and the inner wall of the guide rail 23 positions the locking slide plate 52 within the guide rail 23, thereby locking the position of the swinging pressure arm 4. At this time, the flexible filter screen 3 can be stably wrapped around the valve cover 2. When it is necessary to remove the screen cover, simply move the locking slide plate 52 out of the guide rail 23 and move the swinging pressure arm 4 upward to remove the flexible filter screen 3 from the valve cover 2. This allows for convenient installation and removal of the screen cover, facilitating its replacement and cleaning. It also makes it easy to replace screen covers with different filtration capacities according to the size of the filtered particles.

Claims

1. A bottom valve with a quick-installation mesh cover, comprising a valve body (1) and a valve cover (2) disposed at the inlet position of the valve body (1), characterized in that: It also includes a mesh cover for wrapping around the valve cover (2), the mesh cover being a long strip and a flexible filter screen plate (3) for winding around the valve cover (2). After the flexible filter screen plate (3) is wound around the valve cover (2), the ends are stacked together. The side wall of the valve cover (2) is provided with multiple water inlet holes (21) evenly spaced along the valve cover (2). The valve cover (2) is provided with a swinging pressure arm (4) with one end hinged to the valve cover (2). The inner wall of the swinging pressure arm (4) is provided with a pressure rod (41) for pressing the stacked position of the ends of the flexible filter screen plate (3). The outer wall of the valve cover (2) is provided with a pressure groove (22) for the pressure rod (41) to be inserted. A locking assembly (5) is provided between the swinging pressure arm (4) and the valve cover (2) for locking the position after the swinging pressure arm (4) is pressed.

2. The bottom valve with a quick-installation mesh cover according to claim 1, characterized in that: The valve cover (2) is provided with L-shaped guide rails (23) on its outer periphery and at both the upper and lower ends, with the flexible filter screen (3) embedded on its inner side.

3. A bottom valve with a quick-installation mesh cover according to claim 2, characterized in that: The locking assembly (5) includes an arc-shaped groove (51) opened inside the swing arm (4) and whose end communicates with the outside, a locking plate (52) embedded in the arc-shaped groove (51) and whose end is used to be embedded in the guide rail (23), a strip hole (53) opened on the outer wall of the swing arm (4) and communicating with the arc-shaped groove (51), and a drive arm (54) disposed on the locking plate (52) and passing through the strip hole (53).

4. A bottom valve with a quick-installation mesh cover according to claim 3, characterized in that: The drive arm (54) is provided with a drive plate (541) on the side away from the locking plate (52).

5. A bottom valve with a quick-installation mesh cover according to claim 4, characterized in that: The outer wall of the drive slide plate (541) is also provided with anti-slip stripes (542).

6. A bottom valve with a quick-installation mesh cover according to claim 3, characterized in that: The locking slide plate (52) has a guide arc surface (521) at its end.

7. A bottom valve with a quick-installation mesh cover according to claim 3, characterized in that: The arc-shaped groove (51) is provided in two places, each corresponding to one of the two guide rails (23).

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