Composite sheet with high impact resistance

Abstract

The utility model relates to a composite sheet with high impact resistance, and belongs to the technical field of oil drilling, the composite sheet with high impact resistance comprises a composite sheet mechanism, the composite sheet mechanism comprises a base, a composite layer arranged on the base and spoon-shaped teeth protruding out of the composite layer and connected with the base; after the compact mechanism makes contact with the rock wall, firstly, impact force is made to impact on the spoon-shaped teeth at the first time through the spoon-shaped teeth protruding on the base, the base and a composite layer are prevented from being directly impacted, rock soil is continuously shoveled or excavated through the spoon-shaped faces on the spoon-shaped teeth when the spoon-shaped teeth rotate along with a drill bit, and the rock soil is prevented from being damaged. The cutting effect of the composite sheet mechanism is improved, and the situation that the impact force on the composite sheet mechanism is increased due to the fact that the smooth arc face or plane teeth are extruded or cut through the whole in the cutting process, and the borne resistance and friction force are increased is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of oil drilling, and in particular to a composite sheet with high impact resistance. Background Art

[0002] At present, hard formations with gravel or interlayers in oil fields, such as the Quaternary to Neogene Jidike Formation in the Kuqa Depression of Tarim, the Dongbeiying Formation, and the Beibu Gulf of the South China Sea, are mainly drilled using hybrid drill bits or multi-blade PDC drill bits. However, due to the presence of gravel or interlayers, conventional PDC composite pieces used in the drill bits are prone to chipping and failure.

[0003] Existing special-shaped composite sheets, such as triangular teeth and multi-chamfered teeth, change the tooth shape of the composite sheet, but the impact-resistant material is still a composite layer. Due to the limitations of the composite sheet's own material, the impact resistance still needs to be further improved. Summary of the invention

[0004] The embodiment of the present application provides a composite piece with high impact resistance to solve the problem of poor impact resistance of PDC composite pieces available for existing drill bits in the related art.

[0005] The embodiment of the present application provides a composite sheet with high impact resistance, including:

[0006] The composite sheet mechanism comprises a base, a composite layer arranged on the base, and spoon-shaped teeth protruding from the composite layer and connected to the base.

[0007] In some embodiments, the spoon-shaped teeth and the base are an integral structure;

[0008] The cross-sections of the spoon-shaped teeth and the base are convex.

[0009] In some embodiments, the base is provided with a hole;

[0010] One end of the spoon-shaped teeth is connected to a fixing rod;

[0011] The fixing rod is detachably connected to the hole.

[0012] In some embodiments, the fixing rod and the hole of the base are interference fit.

[0013] In some embodiments, the fixing rod is threadedly connected to the hole.

[0014] In some embodiments, there are a plurality of spoon-shaped teeth, which are arranged in a circular shape with equal spacing around the axis of the base;

[0015] The spoon-shaped surfaces of the multiple spoon-shaped teeth all face the cutting surface.

[0016] In some embodiments, a mesh groove is formed on a side of the base close to the composite layer;

[0017] The composite layer is provided with a block close to the base and matched with the mesh groove.

[0018] In some embodiments, a central hole is formed on the base;

[0019] A plurality of notches arranged in a circular shape and at equal intervals around the axis of the central hole are provided on one side of the base close to the composite layer;

[0020] The notch is in communication with the central hole;

[0021] The spoon-shaped teeth are provided with connecting pieces that match the shapes of the notches and the center hole.

[0022] In some embodiments, the connecting member includes a connecting rod connected to the spoon-shaped teeth, and a plurality of protrusions arranged in a ring shape and at equal intervals around the axis of the connecting rod are provided on the circumference of the connecting rod.

[0023] In some embodiments, each of the protrusions is provided with spoon-shaped teeth.

[0024] The beneficial effects of the technical solution provided by this application include:

[0025] After the composite piece mechanism contacts the rock wall, the first impact force is applied to the spoon-shaped teeth through the spoon-shaped teeth protruding from the base, thereby preventing the base and the composite layer from being directly impacted. When the composite piece mechanism rotates with the drill bit, the spoon-shaped surface of the spoon-shaped teeth continuously scoops up or digs up rock and soil, thereby improving the cutting effect of the composite piece mechanism and preventing the smooth curved or flat teeth from being squeezed or cut as a whole during cutting, thereby increasing the resistance and friction, and increasing the impact force on the composite piece mechanism.

[0026] It also avoids the composite piece structure without raised teeth, which requires the composite piece mechanism to directly contact the rock wall, so that the impact force acts directly on the composite piece mechanism, causing the composite piece to be easily damaged and the service life to be reduced, thereby reducing the efficiency and service life of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A three-dimensional schematic diagram provided for an embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of the structure in which the base and the spoon-shaped teeth are integrated into one piece in the embodiment of the present application;

[0030] Figure 3 This is a schematic diagram of a first structure in which a base and spoon-shaped teeth are detachably connected in an embodiment of the present application;

[0031] Figure 4 This is a second structural schematic diagram of the detachable connection between the base and the spoon-shaped teeth in the embodiment of the present application;

[0032] Figure 5 A cross-sectional schematic diagram provided for an embodiment of the present application;

[0033] Figure 6 A first top view schematic diagram provided in an embodiment of the present application;

[0034] Figure 7 A schematic diagram of the structure of the mesh groove provided in the embodiment of the present application;

[0035] Figure 8 A schematic diagram of the structure provided for the protrusion in the embodiment of the present application;

[0036] Fig. 9 A second top view schematically provided in an embodiment of the present application;

[0037] Fig.10 This is a third top view schematic diagram provided in an embodiment of the present application.

[0038] 1. Composite layer; 2. Base; 21. Hole; 3. Spoon-shaped teeth; 31. Fixing rod; 5. Center hole; 6. Notch; 7. Connecting rod; 8. Bump; 9. Mesh groove; 10. Block. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] The embodiment of the present application provides a composite piece with high impact resistance, which can solve the problem of poor impact resistance of PDC composite pieces available for existing drill bits.

[0041] See also Figure 1-10 As shown, the embodiment of the present application provides a composite sheet with high impact resistance, including:

[0042] The composite sheet mechanism comprises a base 2 , a composite layer 1 arranged on the base 2 , and spoon-shaped teeth 3 protruding from the composite layer 1 and connected to the base 2 .

[0043] After the composite sheet mechanism comes into contact with the rock wall, the first impact force is applied to the spoon-shaped teeth 3 through the spoon-shaped teeth 3 protruding from the base 2, thereby preventing the base 2 and the composite layer 1 from being directly impacted. When the composite sheet mechanism rotates with the drill bit, the spoon-shaped surface of the spoon-shaped teeth 3 continuously scoops up or digs up rock and soil, thereby improving the cutting effect of the composite sheet mechanism and preventing the smooth curved or flat teeth from being squeezed or cut as a whole during cutting, thereby increasing the resistance and friction, and increasing the impact force on the composite sheet mechanism.

[0044] It also avoids the composite piece structure without raised teeth, which requires the composite piece mechanism to directly contact the rock wall, so that the impact force acts directly on the composite piece mechanism, causing the composite piece to be easily damaged and the service life to be reduced, thereby reducing the efficiency and service life of the drill bit.

[0045] In some optional embodiments, see Figure 1-2 As shown, in the composite sheet with high impact resistance, the spoon-shaped teeth 3 and the base 2 are an integrated structure, and the cross-sections of the spoon-shaped teeth 3 and the base 2 are convex.

[0046] By integrating the spoon-shaped teeth 3 with the base 2 , the impact force on the spoon-shaped teeth 3 can be directly transmitted to the base 2 , and the base 2 is used to bear and buffer the impact, so that the impact force is dispersed to the drill bit through the base 2 .

[0047] By integrating the spoon-shaped tooth 3 with the base 2, the overall strength of the spoon-shaped tooth 3 and the base 2 can be improved, and the impact of the base 2 on the spoon-shaped tooth 3 can be dispersed, thereby increasing the life of the spoon-shaped tooth 3 and improving the impact resistance of the composite sheet mechanism.

[0048] In some optional embodiments, see Figure 1 and Figure 3-4 As shown, in the composite sheet with high impact resistance, a hole 21 is opened on the base 2, and a fixing rod 31 is connected to one end of the spoon-shaped tooth 3, and the fixing rod 31 is detachably connected to the hole 21.

[0049] The base 2 and the spoon-shaped tooth 3 can be detachably connected through the hole 21 opened on the base 2 and the fixing rod 31 connected and fixed on the spoon-shaped tooth 3. The detachably connected base 2 and spoon-shaped tooth 3 facilitate the replacement of the spoon-shaped tooth 3 and the base 2, avoiding the spoon-shaped tooth 3 from being subjected to impact at the first time due to long-term use, resulting in damage to the spoon-shaped tooth 3. When the base 2 is not damaged at this time, replacing the entire device will increase the cost. Through the detachable connection, the spoon-shaped tooth 3 can be replaced separately, reducing the cost, maintaining the impact resistance of the composite sheet mechanism, and avoiding the reduction of the impact resistance of the composite sheet mechanism due to damage to the spoon-shaped tooth 3.

[0050] The hole 21 is preferably opened with the axis of the base 2 as the center of the circle, so that the impact on the spoon-shaped teeth 3 can be evenly transmitted to the base 2 and the impact force can be evenly dispersed on the base 2.

[0051] In some optional embodiments, see Figure 1 and Figure 3 As shown, in the composite sheet with high impact resistance, the fixing rod 31 and the hole 21 of the base 2 are interference fit.

[0052] The fixing rod 31 is inserted into the hole 21 opened on the base 2, and the fixing rod 31 and the hole 21 are fixed and limited by friction when using interference fit, so that the fixing rod 31 can be fixed in the hole 21 after being inserted into the hole 21. When disassembly is required, the fixing rod 31 can be pulled out by a force greater than the friction between the hole 21 and the fixing rod 31.

[0053] The fixing rod 31 may be a vertical rod, the hole 21 may be a hole matching the fixing rod 31, or the fixing rod 31 may be a frustum, the diameter of the fixing rod 31 close to the spoon-shaped teeth 3 is smaller than the diameter of the end away from the spoon-shaped teeth 3, or the diameter of the end close to the spoon-shaped teeth 3 is larger than the diameter of the end away from the spoon-shaped teeth 3, so that after the fixing rod 31 is inserted into the hole 21 matching it, the friction force is increased to avoid shaking or falling during use.

[0054] In some optional embodiments, see Figure 1 and Figure 4 As shown, in the composite sheet with high impact resistance, the fixing rod 31 is threadedly connected to the hole 21 .

[0055] The inner wall of the hole 21 is provided with an internal thread, and the outer side of the fixing rod 31 may be provided with an external thread. The fixing rod 31 is threadedly connected to the hole 21, so that the spoon-shaped teeth 3 and the base 2 can be connected and fixed together, and can be directly unscrewed when replacement is required.

[0056] In some optional embodiments, see Figure 1 and Fig. 9 As shown, in the composite sheet with high impact resistance, there are multiple spoon-shaped teeth 3, which are arranged in a ring shape with equal intervals around the axis of the base 2, and the spoon-shaped surfaces of the multiple spoon-shaped teeth 3 are all facing the cutting surface.

[0057] When the composite sheet mechanism is impacted, the impact force can be evenly dispersed to various positions of the base 2 by arranging a plurality of spoon-shaped teeth 3 in a ring shape with equal intervals around the axis of the base 2. By providing a plurality of spoon-shaped teeth 3, the impact force received by a single spoon-shaped tooth 3 can be transmitted evenly and the force can be dispersed, and the single spoon-shaped tooth 3 can be prevented from being damaged easily due to excessive impact, thereby reducing its service life.

[0058] The spoon-shaped surfaces of the spoon-shaped teeth 3 are all facing the cutting surface, so that when the drill bit rotates, the spoon-shaped surfaces of the spoon-shaped teeth 3 are all located on the cutting side, which can make the composite piece mechanism quickly cut after touching the rock wall, reduce the collision impact, and improve the crushing effect of the composite piece mechanism, thereby reducing the pressure on the composite piece mechanism and improving the impact resistance of the composite piece mechanism.

[0059] In some optional embodiments, see Figure 1 and Figure 7-8 As shown, in the composite sheet with high impact resistance, a mesh groove 9 is provided on one side of the base 2 close to the composite layer 1 , and a clamping block 10 matching the mesh groove 9 is provided on the composite layer 1 close to the base 2 .

[0060] The block 10 of the composite layer 1 can be inserted through the mesh groove 9, so that the connection between the base 2 and the composite layer 1 is set in a toothed meshing connection. When the spoon-shaped teeth 3 are subjected to vibration impact, the vibration is transmitted to the composite layer 1, and the composite layer 1 can evenly disperse the vibration impact to various positions of the base 2, thereby improving the transmission efficiency of the impact force, and avoiding that when the composite layer 1 or the spoon-shaped teeth 3 are subjected to force, the impact force is transmitted too slowly or unevenly, causing the composite layer 1 or the spoon-shaped teeth 3 to continue to bear the impact load. The meshing connection setting between the composite layer 1 and the base 2 improves the impact resistance of the composite sheet mechanism and improves the efficiency of the composite sheet mechanism in transmitting the impact force.

[0061] In some optional embodiments, see Figure 5-6 and Fig.10 As shown, in the composite sheet with high impact resistance, a center hole 5 is provided on the base 2, and a plurality of notches 6 arranged in a ring shape with equal intervals around the axis of the center hole 5 are provided on the side of the base 2 close to the composite layer 1, the notches 6 are connected to the center hole 5, and a connecting piece matching the shape of the notches 6 and the center hole 5 is provided on the spoon-shaped teeth 3.

[0062] In this embodiment, the connecting member includes a connecting rod 7 connected to the spoon-shaped teeth 3 , and a plurality of protrusions 8 arranged in a ring shape and at equal intervals around the axis of the connecting rod 7 are arranged on the circumference of the connecting rod 7 .

[0063] In this embodiment, spoon-shaped teeth 3 are provided on each protrusion 8 .

[0064] A center hole 5 is provided in a circle with the axis as the center on one side of the base 2 close to the composite layer 1, and a plurality of notches 6 are provided around the center hole 5 and are arranged in a circular shape with equal intervals around the axis. The notches 6 are connected to the center hole 5, and the length of the notches 6 is less than the distance from the outer wall of the base 2 to the center hole 5. A connecting rod 7 is connected to the side of the spoon-shaped tooth 3 close to the base 2, and the connecting rod 7 can be inserted into the center hole 5. A plurality of protrusions 8 are provided around the connecting rod 7 and are arranged in a circular shape with equal intervals around the axis of the connecting rod 7, and the protrusions 8 can be inserted into the notch 6. The protrusions 8 and the connecting rod 7 can be connected with the notch 6 and the center hole 5 by interference fit, welding, bonding or any other fixing method, wherein the outer wall of the protrusion 8 fits with the notch 6, and the outer wall of the connecting rod 7 fits with the center hole 5.

[0065] The impact on the spoon-shaped tooth 3 and the composite layer 1 can be transmitted to the base 2 evenly and quickly through the protrusion 8. The efficiency of the composite sheet mechanism in transmitting the impact force is enhanced by using the protrusion 8 evenly arranged in the base 2. When the spoon-shaped tooth 3 is impacted, the impact force will be dispersed to the protrusion 8 through the connecting rod 7, and then transmitted to the base 2 by using the protrusion 8, thereby improving the impact resistance of the spoon-shaped tooth 3 and the impact resistance of the composite sheet mechanism, making the overall force of the composite sheet mechanism even, increasing the force area, and reducing the local force intensity.

[0066] Furthermore, a spoon-shaped tooth 3 can be provided on each protrusion 8. Through the multiple spoon-shaped teeth 3 and the correspondingly connected protrusions 8, when the drill bit is working, the multiple spoon-shaped teeth 3 that are evenly arranged can first disperse the impact force, and then the dispersed impact force is further evenly dispersed and transmitted to the protrusions 8 and the connecting rod 7. The impact force is dispersed and transmitted layer by layer, which can reduce the impact strength of the impact force on each structure, further improve the impact resistance of the spoon-shaped teeth 3, and further improve the impact resistance of the composite sheet mechanism.

[0067] Working principle and process of this application:

[0068] After the composite sheet mechanism comes into contact with the rock wall, the first impact force is applied to the spoon-shaped teeth 3 through the spoon-shaped teeth 3 protruding from the base 2, thereby preventing the base 2 and the composite layer 1 from being directly impacted. When the composite sheet mechanism rotates with the drill bit, the spoon-shaped surface of the spoon-shaped teeth 3 continuously scoops up or digs up rock and soil, thereby improving the cutting effect of the composite sheet mechanism and preventing the smooth curved or flat teeth from being squeezed or cut as a whole during cutting, thereby increasing the resistance and friction, and increasing the impact force on the composite sheet mechanism.

[0069] It also avoids the composite piece structure without raised teeth, which requires the composite piece mechanism to directly contact the rock wall, so that the impact force acts directly on the composite piece mechanism, causing the composite piece to be easily damaged and the service life to be reduced, thereby reducing the efficiency and service life of the drill bit.

[0070] When the spoon-shaped teeth 3 and the base 2 are integrally arranged, the impact force on the spoon-shaped teeth 3 can be directly transmitted to the base 2, and the base 2 is used to bear and buffer the impact, so that the impact force is dispersed to the drill bit through the base 2.

[0071] When the spoon-shaped tooth 3 and the base 2 are detachably connected, the base 2 and the spoon-shaped tooth 3 can be detachably connected through the hole 21 opened on the base 2 and the fixing rod 31 connected and fixed to the spoon-shaped tooth 3. The detachably connected base 2 and the spoon-shaped tooth 3 facilitate replacement of the spoon-shaped tooth 3 and the base 2, avoiding that the spoon-shaped tooth 3 is subjected to impact at the first time due to long-term use, resulting in damage to the spoon-shaped tooth 3. When the base 2 is not damaged at this time, replacing the entire device will increase the cost. Through the detachable connection, the spoon-shaped tooth 3 can be replaced separately, reducing the cost, maintaining the impact resistance of the composite sheet mechanism, and avoiding a reduction in the impact resistance of the composite sheet mechanism due to damage to the spoon-shaped tooth 3.

[0072] When the base 2 and the spoon-shaped tooth 3 are connected by an interference fit, the fixing rod 31 is inserted into the hole 21 opened on the base 2. The fixing rod 31 and the hole 21 are fixed and limited by friction during the interference fit, so that the fixing rod 31 can be fixed in the hole 21 after being inserted into the hole 21. When disassembly is required, the fixing rod 31 can be pulled out by a force greater than the friction between the hole 21 and the fixing rod 31.

[0073] When a threaded connection is adopted between the base 2 and the spoon-shaped tooth 3, an internal thread is provided on the inner wall of the hole 21, and an external thread may be provided on the outer side of the fixing rod 31. The fixing rod 31 is threadedly connected to the hole 21, so that the spoon-shaped tooth 3 and the base 2 can be connected and fixed together, and can be directly unscrewed when replacement is needed.

[0074] When there are multiple spoon-shaped teeth 3, when the composite sheet mechanism is impacted, the impact force can be evenly dispersed to various positions of the base 2 by arranging multiple spoon-shaped teeth 3 in a ring shape with equal intervals around the axis of the base 2. By providing multiple spoon-shaped teeth 3, the impact on a single spoon-shaped tooth 3 can be transmitted evenly and the force can be dispersed, which can also prevent a single spoon-shaped tooth 3 from being easily damaged by excessive impact, thereby reducing its service life.

[0075] Moreover, the spoon-shaped surface of the spoon-shaped tooth 3 is located on the cutting side, which can enable the composite sheet mechanism to cut quickly after touching the rock wall, reduce collision impact, and improve the crushing effect of the composite sheet mechanism, thereby reducing the pressure on the composite sheet mechanism and improving the impact resistance of the composite sheet mechanism.

[0076] When the composite layer 1 is meshed with the base 2, the vibration impact on the composite layer 1 can be transmitted quickly and evenly. The block 10 of the composite layer 1 can be inserted through the mesh groove 9, so that the connection between the base 2 and the composite layer 1 is arranged in a toothed meshing connection. When the spoon-shaped teeth 3 are subjected to vibration impact, the vibration is transmitted to the composite layer 1, and the composite layer 1 can evenly disperse the vibration impact to various positions of the base 2, thereby improving the transmission efficiency of the impact force, and avoiding the impact force being transmitted too slowly or unevenly when the composite layer 1 or the spoon-shaped teeth 3 are subjected to force, causing the composite layer 1 or the spoon-shaped teeth 3 to continue to bear the impact load. The meshing connection between the composite layer 1 and the base 2 improves the impact resistance of the composite sheet mechanism and improves the efficiency of the composite sheet mechanism in transmitting the impact force.

[0077] A center hole 5 is opened in a circle with the axis as the center on one side of the base 2 close to the composite layer 1, and a plurality of notches 6 are opened around the center hole 5 and are arranged in a ring shape with equal intervals around the axis. The notches 6 are connected to the center hole 5, and the length of the notches 6 is smaller than the distance from the outer wall of the base 2 to the center hole 5. The connecting rod 7 is connected to the side of the spoon-shaped tooth 3 close to the base 2, and the connecting rod 7 can be inserted into the center hole 5. A plurality of protrusions 8 are arranged in a ring shape with equal intervals around the axis of the connecting rod 7 on the periphery of the connecting rod 7, and the protrusions 8 can be inserted into the notches 6.

[0078] The impact on the spoon-shaped tooth 3 and the composite layer 1 can be transmitted to the base 2 evenly and quickly through the protrusion 8. The efficiency of the composite sheet mechanism in transmitting the impact force is enhanced by using the protrusion 8 evenly arranged in the base 2. When the spoon-shaped tooth 3 is impacted, the impact force will be dispersed to the protrusion 8 through the connecting rod 7, and then transmitted to the base 2 by using the protrusion 8, thereby improving the impact resistance of the spoon-shaped tooth 3 and the impact resistance of the composite sheet mechanism, making the overall force of the composite sheet mechanism even, increasing the force area, and reducing the local force intensity.

[0079] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0080] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0081] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A composite sheet with high impact resistance, characterized in that: include: A composite sheet mechanism comprises a base (2), a composite layer (1) arranged on the base (2), and spoon-shaped teeth (3) protruding from the composite layer (1) and connected to the base (2).

2. The composite sheet with high impact resistance as claimed in claim 1, characterized in that: The spoon-shaped teeth (3) and the base (2) are an integrated structure; The cross-sections of the spoon-shaped teeth (3) and the base (2) are convex.

3. The composite sheet with high impact resistance as claimed in claim 1, characterized in that: The base (2) is provided with a hole (21); One end of the spoon-shaped tooth (3) is connected to a fixing rod (31); The fixing rod (31) is detachably connected to the hole (21).

4. The composite sheet with high impact resistance as claimed in claim 3, characterized in that: The fixing rod (31) and the hole (21) of the base (2) are in interference fit.

5. The composite sheet with high impact resistance as claimed in claim 3, characterized in that: The fixing rod (31) is threadedly connected to the hole (21).

6. The composite sheet with high impact resistance as claimed in claim 1, characterized in that: There are a plurality of spoon-shaped teeth (3), which are arranged in a ring shape with equal spacing around the axis of the base (2); The spoon-shaped surfaces of the plurality of spoon-shaped teeth (3) all face the cutting surface.

7. The composite sheet with high impact resistance as claimed in claim 1, characterized in that: A mesh-shaped groove (9) is provided on one side of the base (2) close to the composite layer (1); The composite layer (1) is provided with a clamping block (10) near the base (2) and matches the mesh groove (9).

8. The composite sheet with high impact resistance as claimed in claim 1, characterized in that: The base (2) is provided with a central hole (5); A plurality of notches (6) arranged in a circular shape and at equal intervals around the axis of the central hole (5) are provided on one side of the base (2) close to the composite layer (1); The notch (6) is in communication with the central hole (5); The spoon-shaped teeth (3) are provided with connecting pieces whose shapes match the notches (6) and the center hole (5).

9. The composite sheet with high impact resistance as claimed in claim 8, characterized in that: The connecting member comprises a connecting rod (7) connected to the spoon-shaped teeth (3), and a plurality of protrusions (8) arranged in an annular shape and at equal intervals around the axis of the connecting rod (7) are arranged on the circumference of the connecting rod (7).

10. The composite sheet with high impact resistance according to claim 9, characterized in that: Each of the protrusions (8) is provided with spoon-shaped teeth (3).

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