Rake teeth of a rotary bar screen

Abstract

This utility model discloses a rake tooth for a rotary bar screen, including a barbed mounting plate. The end of the barbed mounting plate has a positioning groove, and the top of the barbed mounting plate has a hidden square groove. The inner top wall of the hidden square groove has an assembly groove communicating with the positioning groove. In this utility model, by setting a barbed body that can be separated from the barbed mounting plate, combined with a positioning insertion structure of the positioning groove and positioning component, and a quick-locking mechanism composed of a spring assembly, a limit pin, a connecting rod, and a buckle plate, independent replacement of a single barbed body is achieved without disassembling the entire row of rake teeth. Furthermore, the replacement process only requires prying the buckle plate to release the lock, avoiding the difficult operation of tightening screws in the narrow operating space of the bar screen and the risk of screws falling into the machine and causing secondary malfunctions. This effectively solves the problems of cumbersome and inefficient maintenance of rake teeth in the prior art, significantly improving maintenance convenience and equipment operation safety.

Description

Technical Field

[0001] This utility model relates to the field of rake tooth technology, and in particular to a rake tooth for a rotary bar screen. Background Technology

[0002] A rotary bar screen is a device used to remove suspended solids from liquids, and is widely used in sewage treatment, pumping stations, water conservancy projects, and other fields. Its working principle is to continuously remove the debris intercepted by the bar screen using a mechanical device, thereby maintaining the normal operation of the equipment and the high efficiency of the system.

[0003] The rake teeth of a rotary bar screen are one of its core components, used to remove suspended solids from liquids.

[0004] Existing rotary bar screens typically use multiple rows of rake teeth assembled to form a rotary bar screen chain, with the rake teeth mostly manufactured from a single piece of stainless steel. When the barb structure of a single rake tooth is damaged, that rake tooth loses its interception function. In this case, the entire row of rake teeth must be disassembled to replace the damaged unit, and after replacement, the entire row of rake teeth must be reinstalled, resulting in a cumbersome and inefficient maintenance process.

[0005] A search revealed that Chinese patent CN211644629U discloses a rake tooth for a rotary bar screen. One component of the rake tooth is separated into two parts: a barb and a barb mounting plate. When the barb of the rake tooth is damaged, only the damaged barb needs to be replaced, without having to disassemble and replace the entire row of rake teeth.

[0006] However, the above-mentioned device has the following drawbacks: the operating space between the rake teeth of the bar screen is extremely narrow, making it exceptionally difficult to tighten or loosen screws from the side. Maintenance personnel can hardly use tools efficiently when their vision is obstructed, and the screws are very prone to falling into the machine body, causing secondary malfunctions. Therefore, further improvements are needed. To this end, we have proposed a rake tooth design for a rotary bar screen. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a rake tooth for a rotary bar screen.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a rake tooth of a rotary bar screen includes a hook mounting plate, the end of the hook mounting plate is provided with a positioning groove, the top of the hook mounting plate is provided with a hidden square groove, and the inner top wall of the hidden square groove is provided with an assembly groove that communicates with the positioning groove.

[0009] The positioning groove is fitted with a positioning component, and the end of the positioning component is fixedly connected to a barb body.

[0010] A spring assembly is detachably and fixedly connected between the hidden square groove and the assembly groove. A connecting rod is fixedly connected to the movable end of the spring assembly. A limiting pin is fixed to the top of the connecting rod, and the limiting pin matches the positioning component. A buckle plate is fixedly connected to the bottom of the connecting rod, and the buckle plate is sealed inside the hidden square groove.

[0011] Furthermore, a threaded hole is provided on one side of the inner top of the hidden square groove, providing a stable threaded connection basis for the detachable installation of the spring assembly.

[0012] Furthermore, the positioning component includes a positioning block, which is positioned and inserted into the positioning groove and fixedly connected to the barb body. A limiting hole is provided on one side of the bottom of the positioning block, and the limiting hole matches the limiting pin. The matching of the limiting hole and the limiting pin can reliably lock the barb body and prevent it from loosening and falling off during operation.

[0013] Furthermore, the spring assembly includes a mounting plate, which is sealed and installed inside the hidden square groove. The bottom of the mounting plate has a hidden circular groove, and the interior of the hidden circular groove has a connecting bolt that extends through to a threaded hole. The connecting bolt is threadedly connected to the threaded hole, and the hidden circular groove can hide and protect the connecting bolt.

[0014] Furthermore, a mounting base is fixedly connected to the top of the mounting plate, and a guide rod is fixedly connected to the inner top and inner bottom of the mounting base. A movable block is slidably sleeved on the outer surface of the guide rod, and the outer walls on both sides of the movable block slide against the inner walls on both sides of the mounting base and are fixedly connected to the connecting rod. A spring is fixedly connected to the bottom of the movable block, and the spring is sleeved on the outer surface of the guide rod. The spring being sleeved on the guide rod can prevent the spring from deforming and shifting, and ensure its elasticity is stable.

[0015] Furthermore, a slotted opening groove is provided on one side of the bottom edge of the buckle plate, providing a convenient point of force for maintenance personnel to quickly pry open the buckle plate using common tools such as flathead screwdrivers.

[0016] The beneficial effects of this utility model are:

[0017] 1. In use, this utility model features a hook body that can be separated from the hook mounting plate, a positioning slot and positioning component positioning plug-in structure, and a quick locking mechanism composed of a spring assembly, limit pin, connecting rod and buckle plate. This allows for the independent replacement of a single hook body without disassembling the entire row of rake teeth. The replacement process only requires prying the buckle plate to release the lock, avoiding the difficult operation of turning screws in the narrow operating space of the bar screen machine and the risk of screws falling into the machine body and causing secondary failures. This effectively solves the problems of cumbersome and inefficient maintenance of rake teeth in the prior art, and significantly improves the convenience of maintenance and the safety of equipment operation.

[0018] 2. In use, the spring assembly of this utility model is detachably fixed, which makes it easy to replace when damaged, simplifying the maintenance process. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific 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.

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the barbed mounting plate of this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the barb body of this utility model;

[0023] Figure 4 This is a partial cross-sectional view of the present invention.

[0024] The attached figures are labeled as follows:

[0025] 1. Barbed mounting plate; 2. Buckle plate; 3. Barbed body; 4. Assembly slot; 5. Positioning slot; 6. Threaded hole; 7. Concealed square slot; 8. Limiting hole; 9. Positioning block; 10. Concealed round slot; 11. Spring; 12. Slotted screw opening buckle slot; 13. Mounting plate; 14. Connecting bolt; 15. Movable block; 16. Guide rod; 17. Mounting base; 18. Limiting pin; 19. Connecting rod. Detailed Implementation

[0026] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1-4 As shown, the rake teeth of a rotary bar screen include a barbed mounting plate 1, a positioning groove 5 is provided at the end of the barbed mounting plate 1, a hidden square groove 7 is provided at the top of the barbed mounting plate 1, an assembly groove 4 communicating with the positioning groove 5 is provided on the inner top wall of the hidden square groove 7, and a threaded hole 6 is provided on one side of the inner top of the hidden square groove 7.

[0028] The positioning groove 5 is fitted with a positioning component, and the end of the positioning component is fixedly connected to a barb body 3. The positioning component includes a positioning block 9, which is positioned and inserted into the positioning groove 5 and fixedly connected to the barb body 3. A limit hole 8 is opened on one side of the bottom of the positioning block 9. A sealing ring can be set on the outer surface of the positioning block 9. The sealing ring is sealed and abuts against the inner wall of the positioning groove 5 to ensure the sealing performance of the positioning block 9 and the positioning groove 5.

[0029] A spring assembly is detachably and fixedly connected to the concealed square groove 7 and the mounting groove 4. A connecting rod 19 is fixedly connected to the movable end of the spring assembly. The spring assembly includes a mounting plate 13, which is sealed and installed inside the concealed square groove 7. The outer surface and top of the mounting plate 13 are covered with a sealing gasket, which seals against the concealed square groove 7 to ensure the sealing of the connection between the mounting plate 13 and the concealed square groove 7. A concealed circular groove 10 is provided at the bottom of the mounting plate 13. A connecting bolt 14 is provided inside the concealed circular groove 10, which extends to the threaded hole 6. The threads between the connecting bolt 14 and the threaded hole 6 are... The mounting plate 13 is fixedly connected to the top of the mounting base 17. The inner top and inner bottom of the mounting base 17 are fixedly connected to the guide rod 16. The outer surface of the guide rod 16 is slidably fitted with the movable block 15. The outer walls on both sides of the movable block 15 slide against the inner walls on both sides of the mounting base 17 and are fixedly connected to the connecting rod 19. The bottom of the movable block 15 is fixedly connected to the spring 11, and the spring 11 is sleeved on the outer surface of the guide rod 16. When the hook body 3 is in the installation state, the spring 11 is in the compressed state and can provide a predetermined thrust to the movable block 15, the connecting rod 19, and the limit pin 18.

[0030] The top of the connecting rod 19 is fixed with a limiting pin 18, and the limiting hole 8 matches the limiting pin 18. The bottom of the connecting rod 19 is fixedly connected with a buckle plate 2, and the buckle plate 2 is sealed in the hidden square groove 7. A slotted opening buckle groove 12 is opened on one side edge of the bottom of the buckle plate 2. The outer surface of the buckle plate 2 is covered with a sealing sleeve, which seals against the inner wall of the hidden square groove 7 and the outer wall of the mounting plate 13 to ensure the sealing of the connection.

[0031] Working principle: During normal operation of the bar screen machine, the hook body 3 is positioned and inserted into the positioning groove 5 of the hook mounting plate 1 by the positioning block 9 at its end. At this time, under the preload of the spring 11, the movable block 15 and the connected rod 19 connected to it move upward, so that the limiting pin 18 fixed to the top of the connecting rod 19 is inserted into the limiting hole 8 on the positioning block 9. This limiting pin 18 is like a "latch", which firmly locks the positioning block 9 in the positioning groove 5, effectively preventing it from falling off due to pulling or vibration during operation, ensuring the stability of the hook body 3 and the reliability of equipment operation. The entire spring assembly is sealed in the hidden square groove 7 and protected by the buckle plate 2 to prevent sewage and debris from entering and affecting the movement of the mechanism.

[0032] When a barb body 3 is damaged and needs replacement, the repairman uses a flathead screwdriver or similar tool to open the slot 12 at the bottom of the buckle plate 2, prying the buckle plate 2 downwards. The downward movement of the buckle plate 2 causes the connecting rod 19 and the movable block 15 to slide downwards along the guide rod 16, simultaneously compressing the spring 11. This action causes the limiting pin 18, fixed to the top of the connecting rod 19, to completely disengage from the limiting hole 8 of the positioning block 9. Once the limiting pin 18 disengages, the locking state of the barb body 3 is released. At this point, the damaged barb body 3, along with the positioning block 9, can be easily pulled directly out of the positioning slot 5 of the barb mounting plate 1.

[0033] Next, when installing the new barb body 3, simply align its positioning block 9 and insert it into the positioning slot 5, then loosen the buckle plate 2. The compressed spring 11 will automatically rebound, pushing the movable block 15 and the limit pin 18 upward until the limit pin 18 is accurately inserted into the limit hole 8 of the new positioning block 9. Once you hear a "click" or feel it in place, the locking installation is complete.

[0034] When the spring assembly is damaged, it can be replaced by unscrewing the connecting bolt 14.

[0035] All components in this application are made of stainless steel, which increases the overall corrosion resistance and extends the overall service life.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A rake tooth for a rotary grader comprising a barb mounting tab (1) characterised in that: The end of the barbed mounting plate (1) is provided with a positioning groove (5), the top of the barbed mounting plate (1) is provided with a hidden square groove (7), and the inner top wall of the hidden square groove (7) is provided with an assembly groove (4) that communicates with the positioning groove (5). The positioning groove (5) is fitted with a positioning component, and the end of the positioning component is fixedly connected to a barb body (3). The hidden square groove (7) and the assembly groove (4) are detachably fixedly connected by a spring assembly. The movable end of the spring assembly is fixedly connected to a connecting rod (19). The top of the connecting rod (19) is fixed with a limiting pin (18), and the limiting pin (18) matches the positioning part. The bottom of the connecting rod (19) is fixedly connected with a buckle plate (2), and the buckle plate (2) is sealed in the hidden square groove (7).

2. A rake tooth for a rotary grader according to claim 1, characterised in that: A threaded hole (6) is provided on one side of the inner top of the hidden square groove (7).

3. The rake teeth of a rotary bar screen according to claim 1, characterized in that: The positioning component includes a positioning block (9), which is positioned and inserted into the positioning groove (5) and fixedly connected to the barb body (3). A limiting hole (8) is opened on one side of the bottom of the positioning block (9), and the limiting hole (8) matches the limiting pin (18).

4. The rake teeth of a rotary bar screen according to claim 2, characterized in that: The spring assembly includes a mounting plate (13), which is sealed and installed inside the hidden square groove (7). The bottom of the mounting plate (13) is provided with a hidden circular groove (10). The interior of the hidden circular groove (10) is provided with a connecting bolt (14) that passes through to the threaded hole (6), and the connecting bolt (14) is threadedly connected to the threaded hole (6).

5. A pin for a rotary grizzly according to claim 4, characterized in that: The top of the mounting plate (13) is fixedly connected to a mounting base (17). The inner top and inner bottom of the mounting base (17) are fixedly connected to a guide rod (16). The outer surface of the guide rod (16) is slidably fitted with a movable block (15). The outer walls on both sides of the movable block (15) slide against the inner walls on both sides of the mounting base (17) and are fixedly connected to the connecting rod (19). The bottom of the movable block (15) is fixedly connected to a spring (11), and the spring (11) is sleeved on the outer surface of the guide rod (16).

6. A pin for a rotary grizzly according to claim 1, characterized in that: The bottom edge of the buckle (2) has a slot (12) for opening.

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