Scraper cutter with replaceable hard alloy teeth

Abstract

The utility model discloses a scraper cutter with replaceable hard alloy teeth, and belongs to the technical field of shield tunneling machine accessories. The scraper cutter with the replaceable hard alloy teeth comprises a scraper body, four small alloy teeth and four large alloy teeth, two alloy grooves are formed in the upper surface of the scraper body, the middle of the upper end of each small alloy tooth protrudes upwards, L-shaped small clamping openings are formed in the two sides of the protruding part of each small alloy tooth, a large clamping opening is formed in one side of the lower end of each large alloy tooth, and the small clamping openings are communicated with the large clamping openings. Pressing blocks are clamped in the small bayonets and the large bayonets, and the small alloy teeth and the large alloy teeth are detachably connected with the scraper body through the pressing blocks. According to the utility model, the problem that the existing scraper cutter and the alloy teeth are inconvenient to replace is solved, and when the small alloy teeth and the large alloy teeth are worn or broken, the small alloy teeth and the large alloy teeth can be easily replaced by disassembling and assembling the pressing block, so that the maintenance time of the scraper is saved, and the maintenance cost of the scraper is also greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine accessories, in particular to a scraper tool with replaceable carbide teeth. Background Art

[0002] Due to the complex and harsh working environment of the shield machine, during the operation, the carbide scraper will constantly rub and collide with various hard geological structures, which can easily cause the carbide to wear or break.

[0003] The existing front scraper tool welds the carbide teeth to the scraper body using 45% silver-based brazing, which consumes a large amount of silver sheets and welding powder. In addition, the carbide teeth are exposed on the outside and are easily broken by impact during excavation. If the carbide teeth are worn or broken, the entire scraper must be replaced, which is not conducive to the reuse of the scraper.

[0004] Therefore, we propose a scraper tool with replaceable carbide teeth to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a scraper tool with replaceable carbide teeth. When the carbide is worn or broken, the pressing block can be removed and easily replaced, thereby effectively solving the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a scraper tool with replaceable carbide teeth, comprising a scraper body, four small alloy teeth and four large alloy teeth, two alloy grooves being provided on the upper surface of the scraper body, the middle of the upper end of the small alloy tooth protrudes upward, and small L-shaped snap-in openings are formed on both sides of the protruding part, a large snap-in opening is provided on one side of the lower end of the large alloy tooth, the small snap-in opening and the large snap-in opening are internally clamped with a pressure block, and the small alloy teeth and the large alloy teeth are detachably connected to the scraper body through the pressure block.

[0007] Preferably, a wear-resistant layer is fixedly mounted on the front and rear sides of the scraper body.

[0008] Preferably, surrounding blocks are integrally provided on both sides of the alloy tank, and the surrounding blocks are semi-enclosed.

[0009] Preferably, a plurality of first screw holes are opened on the upper surface of the scraper body, a second screw hole is opened on the upper surface of the pressing block, and bolts are threadedly connected inside the second screw holes. The bolt threads pass through the second screw holes and threadedly penetrate into the interior of the first screw holes.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] (1) The utility model provides a scraper tool with replaceable carbide teeth. The small carbide teeth and the large carbide teeth are detachably connected to the scraper body. They can be easily replaced after being worn or broken without replacing the entire scraper, thereby saving the maintenance time of the scraper and greatly reducing the maintenance cost.

[0012] (2) The utility model provides a scraper tool with replaceable carbide teeth. The semi-enclosed block inside the alloy groove can reduce the friction of the formation material on the side surface of the carbide teeth, prevent the shape of the carbide teeth from changing, and extend the service life of the alloy teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the entire utility model;

[0014] Figure 2 A schematic diagram of the installation of the pressing block of the present invention;

[0015] Figure 3 A schematic diagram of the alloy tank of the present invention;

[0016] Figure 4 This is a schematic diagram of the present invention before improvement.

[0017] In the figure: 1. scraper body; 11. wear-resistant layer; 12. alloy groove; 121. surrounding block; 13. first screw hole; 2. small alloy teeth; 21. small bayonet; 3. large alloy teeth; 31. large bayonet; 4. pressure block; 41. second screw hole; 42. bolt. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-4A scraper tool with replaceable carbide teeth comprises a scraper body 1, four small alloy teeth 2 and four large alloy teeth 3. Two alloy grooves 12 are provided on the upper surface of the scraper body 1. The middle of the upper end of the small alloy tooth 2 protrudes upward, and an L-shaped small bayonet 21 is formed on both sides of the protruding part. A large bayonet 31 is provided on one side of the lower end of the large alloy tooth 3. The small bayonet 21 and the large bayonet 31 are internally connected with a pressure block 4. The small alloy teeth 2 and the large alloy teeth 3 are detachably connected to the scraper body 1 through the pressure block 4. During use, when the small alloy teeth 2 and the large alloy teeth 3 are worn or broken, the small alloy teeth 2 and the large alloy teeth 3 can be easily replaced by disassembling the pressure block 4, thereby saving time for scraper maintenance and greatly reducing the scraper maintenance cost.

[0020] Furthermore, a wear-resistant layer 11 is fixedly installed on the front and rear sides of the scraper body 1. When in use, the wear-resistant layer 11 can prevent sand and gravel from directly scratching the scraper base, avoiding the scraper from becoming thinner, deformed or even damaged due to long-term friction.

[0021] Furthermore, enclosing blocks 121 are integrally provided on both sides of the alloy groove 12. The enclosing blocks 121 are semi-enclosed in design. When in use, during the tunneling process of the shield machine, the stratum structure is complex and the scraper may be subjected to lateral friction. The semi-enclosed design of the enclosing blocks 121 can reduce the friction of the stratum material on the side of the carbide teeth, and prevent the shape of the carbide teeth from changing due to side wear. At the same time, the semi-enclosed design can also facilitate disassembly and assembly operations.

[0022] Furthermore, a plurality of first screw holes 13 are provided on the upper surface of the scraper body 1, and a second screw hole 41 is provided on the upper surface of the pressure block 4. The second screw hole 41 is threadedly connected to a bolt 42. The bolt 42 threadably passes through the second screw hole 41 and threadedly penetrates into the interior of the first screw hole 13. When in use, when disassembling the small alloy tooth 2 or the large alloy tooth 3, it is only necessary to unscrew the bolt 42 to disengage the bolt 42 from the second screw hole 41 and the first screw hole 13, and then pull the pressure block 4 out of the small bayonet 21 or the large bayonet 31 to complete the disassembly of the small alloy tooth 2 or the large alloy tooth 3. The reverse operation can be performed during installation, thereby increasing the overall applicability.

[0023] Working principle: The utility model is a scraper tool with replaceable carbide teeth. When the small alloy teeth 2 and the large alloy teeth 3 are worn or broken and need to be replaced, the maintenance personnel first unscrew the bolt 42 to disengage the bolt 42 from the second screw hole 41 and the first screw hole 13. Since the bolt 42 no longer fixes the pressing block 4, the pressing block 4 can be pulled out from the small bayonet 21 or the large bayonet 31, thereby releasing the fixation of the small alloy teeth 2 or the large alloy teeth 3, so that the damaged small alloy teeth 2 or the large alloy teeth 3 can be easily replaced. Remove it. When installing a new small alloy tooth 2 or large alloy tooth 3, follow the reverse operation sequence. First, place the small alloy tooth 2 or large alloy tooth 3 in the alloy groove 12, then align the pressure block 4 with the small bayonet 21 or the large bayonet 31 and insert it, and then use the bolt 42 to fix the pressure block 4 through the second screw hole 41 and the first screw hole 13 to complete the installation of the small alloy tooth 2 or the large alloy tooth 3. This detachable connection method makes it unnecessary to replace the entire scraper body 1 when the alloy tooth is damaged, thereby saving the maintenance time of the scraper and reducing the maintenance cost.

Claims

1. A scraper tool with replaceable carbide teeth, comprising a scraper body (1), four small carbide teeth (2) and four large carbide teeth (3), wherein the upper surface of the scraper body (1) is provided with two carbide grooves (12), and characterized in that: The middle of the upper end of the small alloy tooth (2) is upwardly protruded, and two sides of the protruding portion form an L-shaped small bayonet (21). A large bayonet (31) is provided on one side of the lower end of the large alloy tooth (3). The small bayonet (21) and the large bayonet (31) are internally engaged with a pressure block (4). The small alloy tooth (2) and the large alloy tooth (3) are detachably connected to the scraper body (1) via the pressure block (4).

2. The scraper tool with replaceable carbide teeth according to claim 1, characterized in that: Wear-resistant layers (11) are fixedly mounted on the front and rear sides of the scraper body (1).

3. The scraper tool with replaceable carbide teeth according to claim 2, characterized in that: Surrounding blocks (121) are integrally provided on both sides of the interior of the alloy groove (12), and the surrounding blocks (121) are of a semi-enclosed design.

4. The scraper tool with replaceable carbide teeth according to claim 3, characterized in that: The scraper body (1) is provided with a plurality of first screw holes (13) on its upper surface, and the pressing block (4) is provided with a second screw hole (41) on its upper surface. The second screw hole (41) is internally threadedly connected with a bolt (42), and the bolt (42) is threadedly passed through the second screw hole (41) and threadedly penetrated into the interior of the first screw hole (13).

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