Crushing grating
By designing a sliding bar screen structure and a crushing unit, the problem of garbage residue and foam affecting water intake in the crushing bar device was solved, achieving efficient defoaming and space saving.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG GENESIS ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-05-05
AI Technical Summary
When treating sewage, existing shredder screens produce crushed waste residue and foam that float on the screen surface, affecting water intake, taking up space, and having low economic efficiency.
Design a sliding bar screen structure that combines a water guide tank and a crusher unit. The sliding of the bar screen is achieved by using a cam and a motor drive. The combination of inner and outer bar screens and a flanged structure improves the defoaming effect.
It effectively avoids residue and foam affecting water intake during the crushing process, saves space, and improves economic efficiency.
Smart Images
Figure CN224199155U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment, specifically a crushing bar. Background Technology
[0002] A crushing bar is an inlet bar screen device equipped with a crusher unit. This type of device is equipped with a crusher and can crush large particles of garbage or other debris in the incoming sewage.
[0003] While shredders can break down large waste, some of the shredded waste (most of which is carried away by the shredder itself) will float on the surface of the screen, especially oily wastewater, which can affect the influent to the screen due to surface tension. In practical applications, some large wastewater treatment plants install a filtration and lifting device at the rear of the shredder, using a conveyor belt with mesh to lift the shredded waste and water upwards, and then install a screen structure at the rear of the filtration and lifting device for further filtration. However, in some pre-treatment scenarios, this design takes up too much space and is not economically efficient. Utility Model Content
[0004] The purpose of this invention is to provide a crushing grid to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a crushing grid, including a water guide box, a crushing unit installed in the water guide box, and a grid installed on both sides of the crushing unit;
[0006] The two sides of the bar screen are fixed on the connecting shaft. The inside and bottom of the water guide tank are provided with mounting grooves for mounting the connecting shaft. The upper and lower ends of the connecting shaft are inserted into the corresponding mounting grooves and are slidably connected with the mounting grooves.
[0007] The upper part of the connecting shaft has a groove, and a cam is embedded in the groove. One end of the cam is driven by a motor via a drive shaft.
[0008] A base post is fixed in the mounting groove at the bottom, and a spring connects the bottom of the connecting shaft to the base post.
[0009] Preferably, there are two sets of connecting shafts, located on the left and right sides of the grid.
[0010] Preferably, the upper and lower edges of the grating are spaced 2-4cm apart from the inner wall of the water guide tank, serving as a space for the grating to slide up and down as a connecting shaft.
[0011] Preferably, the bar screen on one side has two layers, inner and outer. The bar screen on the water-facing side is equipped with a connecting shaft, while the bar screen on the back side is a fixed installation structure.
[0012] Preferably, the crushing unit includes two crushing rollers, a main motor for driving the two crushing rollers to rotate in opposite directions, and a drive gear set.
[0013] Preferably, the outer side of the mesh opening of the grid has a flange structure.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] This utility model provides a crushing grid, mainly in that the grid mesh is designed to slide up and down. This design is actually based on the principle of a demister, and is used to prevent residue or foam from affecting the water intake of the grid mesh during the crushing process. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the installation of the connecting shaft of the grid mesh of this utility model;
[0018] Figure 3 This is a schematic diagram of the grid mesh flange structure of this utility model. Detailed Implementation
[0019] 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.
[0020] Please refer to the figure. This embodiment provides a crushing grid, including a water guide box 1, a crushing unit installed in the water guide box 1, and a grid 3 installed on both sides of the crushing unit.
[0021] Reference Figure 2 As shown, the two sides of the grid mesh 3 are fixed on the connecting shaft 32, and a fixing groove is provided in the middle of the connecting shaft 32.
[0022] The water guide tank 1 has mounting grooves for mounting the connecting shaft 32 inside and at the bottom. The upper and lower ends of the connecting shaft 32 are inserted into the corresponding mounting grooves and are slidably connected with the mounting grooves.
[0023] The upper part of the connecting shaft 32 has a groove, and a cam 33 is embedded in the groove. One end of the cam 33 is driven by a motor via a drive shaft 31. A bottom post 35 is fixed in the mounting groove at the bottom, and a spring 34 is connected between the bottom of the connecting shaft 32 and the bottom post 35.
[0024] In actual implementation, a sealing ring is embedded at the connection between the connecting shaft 32 and the upper and lower mounting grooves to achieve sealing and waterproofing.
[0025] The upper and lower edges of the grille 3 are spaced 2-4 cm from the inner wall of the water guide tank 1, serving as the space for the connecting shaft 31 to drive the grille to slide up and down. In practice, this distance depends on the specific scenario and is determined by the size of the grille mesh opening. In this embodiment, a fiberglass grille with an opening size of 25*25mm is used. After determining the sliding distance, the corresponding cam 33 can be selected to achieve the desired function.
[0026] In this embodiment, the single-sided grating 3 has inner and outer layers. The grating 3 on the water-facing side is equipped with a connecting shaft 32, while the grating 3 on the back side is a fixed installation structure, consisting of four gratings arranged in pairs on both sides. This is because in practical applications, it has been found that some long debris gets stuck on the mesh opening side, making it difficult to remove even with sliding. The gratings on both sides are designed so that they can be directly cut off such debris through sliding.
[0027] In addition, the outer side of the mesh opening of the grid 3 has a flange structure 30, which improves the defoaming and impurity removal effect.
[0028] The crushing unit includes two crushing rollers 2, a main motor 5 for driving the two crushing rollers 2 to rotate in opposite directions, and a drive gear set. A conventional crushing unit can be used; this application makes no changes to this part.
[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A type of crushed grid, characterized in that: Includes a water guide box (1), a crushing unit installed in the water guide box (1), and a grid (3) installed on both sides of the crushing unit; The two sides of the grid (3) are fixed on the connecting shaft (32). The inside and bottom of the water guide box (1) are provided with mounting grooves for mounting the connecting shaft (32). The upper and lower ends of the connecting shaft (32) are inserted into the mounting grooves at the corresponding positions and are slidably connected with the mounting grooves. The upper part of the connecting shaft (32) is provided with a groove, and a cam (33) is embedded in the groove. One end of the cam (33) is driven by a motor via a drive shaft (31). A base post (35) is fixed in the mounting groove at the bottom, and a spring (34) is connected between the bottom of the connecting shaft (32) and the base post (35).
2. The crushing grid according to claim 1, characterized in that: Two sets of connecting shafts (32) are provided, located on the left and right sides of the grid (3).
3. A crushing grid according to claim 2, characterized in that: The upper and lower edges of the grid (3) are spaced 2-4cm apart from the inner wall of the water guide tank (1), serving as the space for the grid to slide up and down via the connecting shaft (32).
4. A crushing grid according to claim 3, characterized in that: The single-sided grid (3) has two layers, inner and outer. The grid (3) on the water-facing side is connected by a connecting shaft (32), while the grid (3) on the back side is a fixed installation structure.
5. A crushing grid according to claim 4, characterized in that: The crusher unit includes two crushing rollers (2) and a main motor (5) and a drive gear set for driving the two crushing rollers (2) to rotate in opposite directions.
6. A crushing grid according to claim 1, characterized in that: The outer side of the mesh opening of the grid (3) has a flange structure (30).