A baffle plate for preventing foreign matter backflow at the drain outlet of a filter

Abstract

This utility model relates to the field of baffle technology and discloses a filter drain outlet anti-backflow baffle, including a connecting flange, a fixed drain pipe fixedly installed at the bottom of the connecting flange, a threaded sleeve installed on the external thread of the fixed drain pipe, a connecting drain pipe fixedly installed inside the threaded sleeve, and a self-cleaning ball baffle mechanism provided inside the connecting drain pipe. In use, this filter drain outlet anti-backflow baffle uses a double-sloping circular baffle embedded inside the connecting drain pipe instead of a traditional baffle that rotates at the bottom. With the cooperation of suspended stainless steel vacuum balls, it can prevent the backflow of external foreign objects. Utilizing the buoyancy of the sewage during discharge, the balls float in the sewage. The suspended stainless steel vacuum balls rolling in the water flow have a certain self-cleaning ability and can retract into the double-sloping circular baffle after discharge stops, preventing backflow or blockage.

Description

Technical Field

[0001] This utility model relates to the field of baffle technology, specifically a baffle for preventing foreign matter from flowing back into the drain outlet of a filter. Background Technology

[0002] The filter drain outlet anti-backflow baffle, also known as a check baffle, one-way baffle, or anti-backflow plate, is a key safety component installed at the outlet of the filter drain pipe. Its main and most important function is to prevent foreign objects (such as leaves, mud, insects, small animals, plastic bags, garbage fragments, etc.) and unclean fluids (such as rainwater and sewage) from the external environment from "backflowing" or "returning" into the filter or even the entire protected system after the drain is finished and the drain valve is closed.

[0003] In existing technology, backflow prevention baffles are typically made of a lightweight, corrosion-resistant material (such as plastic, rubber, or stainless steel) and installed at the opening of the sewage pipe that ultimately discharges into the environment. When the drain valve is opened for sewage discharge, the high-speed water flow (or air) generates sufficient pressure and velocity to push the baffle open, allowing the waste to be discharged smoothly to the outside. Once the drain valve is closed, the water flow in the sewage pipe stops, the pressure disappears, and the baffle automatically falls back to the closed position under its own weight (or possibly with spring assistance). While the drain outlet is tightly covered, in actual use, the baffle is usually connected by hinges or pivots. The hinges and pivots are prone to dirt accumulation or foreign objects getting stuck. Furthermore, dirt attached to the edge of the baffle or the seat ring can also prevent it from closing completely. Even if a spring is used for reset, the spring is prone to corrosion, failure, or foreign objects getting caught in the dirt environment, resulting in the baffle not closing completely or having an insufficient opening angle. In severe cases, it may completely fail, losing its anti-backflow function or obstructing the drain. Therefore, it is necessary to improve the filter drain outlet baffle to prevent foreign objects from flowing back into the water and solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a baffle plate for preventing foreign matter backflow at the drain outlet of a filter, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a filter drain outlet anti-foreign object backflow baffle, including a connecting flange, a fixed drain pipe is fixedly installed at the bottom of the connecting flange, a threaded sleeve is installed on the external thread of the fixed drain pipe, a connecting drain pipe is fixedly installed inside the threaded sleeve, and a self-cleaning ball baffle mechanism is provided inside the connecting drain pipe.

[0006] Preferably, the self-cleaning ball baffle mechanism includes a double-sloping circular baffle, which is fixedly installed inside the connecting sewage pipe. The double-sloping circular baffle has a connecting ring groove inside, and a suspended stainless steel vacuum ball is disposed inside the connecting ring groove. The connecting sewage pipe has an installation slot inside, and an installation slide rod is slidably installed inside the installation slot. A connecting rod is fixedly installed on the inner side of the installation slide rod, and an upper limiting cage is fixedly installed on the inner side of the connecting rod. A lower limiting grid is fixedly installed at the bottom of the upper limiting cage.

[0007] Preferably, the diameter of the suspended stainless steel vacuum sphere is smaller than the inner diameter of the lower limiting grid, and the diameter of the suspended stainless steel vacuum sphere is larger than the inner diameter of the internal opening of the double-sloping circular baffle.

[0008] Preferably, the upper limiting cage is a cone-shaped stainless steel mesh cage with the flared opening facing downwards, and the lower limiting grid is an annular radial stainless steel grid.

[0009] Preferably, the mounting slide and the mounting slot are fitted with a clearance fit, and the depth of the mounting slot corresponds to the length of the mounting slide.

[0010] Preferably, the docking ring groove corresponds in size to the lower limiting grille, and the lower limiting grille is slidably installed inside the docking ring groove.

[0011] Compared with the prior art, this utility model provides a baffle plate for preventing foreign matter backflow at the drain outlet of a filter, which has the following beneficial effects: This filter's backflow prevention baffle features a self-cleaning ball baffle mechanism. During use, a double-sloping circular baffle embedded inside the drain pipe replaces the traditional bottom-rotating baffle. Combined with suspended stainless steel vacuum spheres, this prevents backflow of external foreign objects. Utilizing the buoyancy of the wastewater during discharge, the spheres float in the water flow. The suspended stainless steel vacuum spheres, rolling in the water, possess a certain self-cleaning ability. After discharge stops, they retract into the double-sloping circular baffle, preventing backflow or blockage. The modular installation allows for easy disassembly of the self-cleaning ball baffle mechanism for maintenance and cleaning, improving the stability of the backflow prevention baffle. Attached Figure Description

[0012] 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. Figure 1This is a schematic diagram of the appearance and structure of this utility model; Figure 2 This is a cross-sectional view of the external structure of this utility model; Figure 3 This is a cross-sectional view of the self-cleaning ball stop mechanism of this utility model. Figure 4 This is a cross-sectional view and exploded view of the self-cleaning ball stop mechanism of this utility model.

[0013] In the diagram: 1. Connecting flange; 2. Fixed drain pipe; 3. Threaded sleeve; 4. Connecting drain pipe; 5. Self-cleaning ball baffle mechanism; 51. Double-sloped circular baffle; 52. Connecting ring groove; 53. Suspended stainless steel vacuum sphere; 54. Mounting slide bar; 55. Connecting rod; 56. Upper limiting cage; 57. Lower limiting grid; 58. Mounting slot. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0016] Example: Please see Figure 1-4 This utility model provides a technical solution: a filter drain outlet anti-foreign object backflow baffle, including a connecting flange 1, a fixed drain pipe 2 fixedly installed at the bottom of the connecting flange 1, a threaded sleeve 3 installed on the external thread of the fixed drain pipe 2, a docking drain pipe 4 fixedly installed inside the threaded sleeve 3, and a self-cleaning ball baffle mechanism 5 provided inside the docking drain pipe 4.

[0017] The structure of the detachable threaded sleeve 3 enables rapid maintenance, while the self-cleaning ball stop mechanism 5 and the docking sewage pipe 4 form a modular assembly, which greatly reduces the difficulty of maintenance.

[0018] Furthermore, the self-cleaning ball baffle mechanism 5 includes a double-sloped circular baffle 51, which is fixedly installed inside the connecting sewage pipe 4. The double-sloped circular baffle 51 has a connecting ring groove 52 inside, and a suspended stainless steel vacuum ball 53 is installed inside the connecting ring groove 52. The connecting sewage pipe 4 has an installation slot 58 inside, and an installation slide rod 54 is slidably installed inside the installation slot 58. A connecting rod 55 is fixedly installed on the inner side of the installation slide rod 54, and an upper limiting cage 56 is fixedly installed on the inner side of the connecting rod 55. A lower limiting grid 57 is fixedly installed at the bottom of the upper limiting cage 56. Through the self-cleaning ball baffle mechanism 5, the suspended stainless steel vacuum ball 53 moves autonomously under the action of fluid buoyancy, effectively blocking the backflow and intrusion path of foreign objects. The upper limiting cage 56 and the lower limiting grid 57 can prevent the ball from being lost.

[0019] Furthermore, the diameter of the suspended stainless steel vacuum sphere 53 is smaller than the inner diameter of the lower limiting grid 57, and the diameter of the suspended stainless steel vacuum sphere 53 is larger than the inner diameter of the internal opening of the double-sloping circular baffle 51. The precise size matching ensures that when the sphere rises due to buoyancy during sewage discharge, it is limited by the grid. When closed, it is firmly positioned in the double-sloping circular baffle 51 to form a line seal, eliminating the risk of micro-leakage.

[0020] Furthermore, the upper limiting cage 56 is a cone-shaped stainless steel mesh cage with the flared opening facing downwards, and the lower limiting grid 57 is an annular radial stainless steel grid. Through the cooperation of the upper limiting cage 56 and the lower limiting grid 57, the floating suspended stainless steel vacuum sphere 53 can be effectively limited, restricting its movement path.

[0021] Furthermore, the mounting slide 54 and the mounting slot 58 are fitted with a clearance fit, and the depth of the mounting slot 58 corresponds to the length of the mounting slide 54. This clearance fit facilitates the installation of the mounting slide 54, allowing it to easily slide into the mounting slot 58, while also making disassembly convenient.

[0022] Furthermore, the size of the docking ring groove 52 corresponds to that of the lower limiting grille 57, and the lower limiting grille 57 is slidably installed inside the docking ring groove 52. The lower limiting grille 57, which is slidably installed inside the docking ring groove 52, can be limited by the docking ring groove 52 to prevent the bottom end from loosening after installation.

[0023] In actual operation, when this device is used, the entire device can be installed by connecting flange 1 to the upper drain valve. When the drain valve discharges sewage, the pressurized sewage will impact the inside of the connecting drain pipe 4. The suspended stainless steel vacuum ball 53 will rise with the rise of the sewage level. At this time, the suspended stainless steel vacuum ball 53 will be limited by the upper limit cage 56 and the lower limit grid 57. When the fluid continues to flow, the suspended stainless steel vacuum ball 53 will be maintained in a suspended position or close to the top of the upper limit cage 56. The suspended stainless steel vacuum ball 53 will self-clean with the impact of the water flow to avoid the adhesion of foreign objects that may affect the obstruction. When the drain valve stops working, the fluid stops moving, and the float gradually descends with buoyancy and embeds into the inside of the double-sloped circular baffle 51 to complete the sealing.

[0024] When performing maintenance and cleaning of the self-cleaning ball block mechanism 5, rotating the docking drain pipe 4 will cause the threaded sleeve 3 to rotate and disassemble the docking drain pipe 4. At this time, the sliding installation rod 54 can be slidably installed to disassemble the upper limiting cage 56 and the lower limiting grid 57. At this time, the suspended stainless steel vacuum ball 53 can also be easily disassembled.

[0025] It should be noted that the suspended stainless steel vacuum sphere (53) is not limited to stainless steel vacuum material as a suspended sphere. Different materials of suspended spheres can be selected according to the density of the specific sewage.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A filter drain outlet anti-backflow baffle, comprising a connecting flange (1), characterized in that: A fixed drain pipe (2) is fixedly installed at the bottom of the connecting flange (1). A threaded sleeve (3) is installed on the external thread of the fixed drain pipe (2). A docking drain pipe (4) is fixedly installed inside the threaded sleeve (3). A self-cleaning ball baffle mechanism (5) is provided inside the docking drain pipe (4).

2. The filter drain outlet anti-foreign matter backflow baffle according to claim 1, characterized in that: The self-cleaning ball baffle mechanism (5) includes a double-sloped circular baffle (51), which is fixedly installed inside the docking sewage pipe (4). The double-sloped circular baffle (51) has a docking ring groove (52) inside, and a suspended stainless steel vacuum ball (53) is provided inside the docking ring groove (52). The docking sewage pipe (4) has an installation slot (58) inside, and an installation slide rod (54) is slidably installed inside the installation slot (58). A connecting rod (55) is fixedly installed on the inner side of the installation slide rod (54), and an upper limiting cage (56) is fixedly installed on the inner side of the connecting rod (55). A lower limiting grid (57) is fixedly installed at the bottom of the upper limiting cage (56).

3. The filter drain outlet anti-backflow baffle according to claim 2, characterized in that: The diameter of the suspended stainless steel vacuum sphere (53) is smaller than the inner diameter of the lower limiting grille (57), and the diameter of the suspended stainless steel vacuum sphere (53) is larger than the inner diameter of the internal opening of the double-sloping circular baffle (51).

4. The filter drain outlet anti-foreign matter backflow baffle according to claim 2, characterized in that: The upper limiting cage (56) is a cone-shaped stainless steel mesh cage with the flared opening facing downwards, and the lower limiting grid (57) is an annular radial stainless steel grid.

5. A filter drain outlet anti-backflow baffle according to claim 2, characterized in that: The mounting slide (54) and the mounting slot (58) are fitted with a clearance fit, and the depth of the mounting slot (58) corresponds to the length of the mounting slide (54).

6. A filter drain outlet anti-foreign matter backflow baffle according to claim 2, characterized in that: The docking ring groove (52) corresponds to the size of the lower limiting grille (57), and the lower limiting grille (57) is slidably installed inside the docking ring groove (52).

Images