Modular assembly type dam reinforcing structure

Abstract

The utility model relates to the technical field of dam reinforcing, and discloses a modular assembly type dam reinforcing structure which comprises a transverse supporting rod and a plurality of wave-resistant blocks, the top of the transverse supporting rod is fixedly connected with a plurality of longitudinal sleeve rods, and the tops of the wave-resistant blocks are fixedly connected with a plurality of connecting columns at equal intervals. A plurality of clamping grooves are formed in the bottom of the wave-resistant block at equal intervals, a first protruding block is fixedly connected to the top of the left side of the wave-resistant block, a second protruding block is fixedly connected to the bottom of the right side of the wave-resistant block, the first protruding block on the left side and the second protruding block on the right side are clamped with each other, and through holes are formed in the bottoms of the first protruding block and the second protruding block. According to the anti-wave dam reinforcing structure, the longitudinal sleeve rods are connected with the anti-wave blocks, meanwhile, the anti-wave blocks are stacked with the clamping grooves through the connecting columns, the effect of constructing the stable and efficient dam reinforcing structure is achieved, the impact force of water flow can be effectively dispersed, damage to the dam body is reduced, the flood prevention capacity of the dam is enhanced, and meanwhile installation is convenient and fast, and the structure is stable.

Description

Technical Field

[0001] This utility model relates to the field of dam reinforcement technology, and in particular to a modular prefabricated dam reinforcement structure. Background Technology

[0002] As a component of water conservancy infrastructure, dikes play an irreplaceable role in flood control, irrigation, water resource allocation, and maintaining ecological balance. In terms of flood control, dikes can resist floods, protect the safety of surrounding towns, villages, and a large amount of infrastructure, and safeguard people's lives and property. In the field of irrigation, they can rationally regulate water flow, ensure that farmland receives sufficient and timely water, and support stable agricultural production. From the perspective of water resource allocation, dikes can effectively store and distribute water resources to meet the diverse needs of urban and rural domestic water use and industrial water use. In terms of ecology, dikes affect the stability of river ecosystems and provide suitable habitats for many organisms.

[0003] However, with the increase in extreme weather caused by climate change and the increasing demands on water conservancy safety due to socio-economic development, traditional dam structures urgently need innovative reinforcement technologies and structures to enhance their performance. Modular prefabricated dam reinforcement structures have emerged to address these issues, providing new ideas and solutions.

[0004] Existing methods for reinforcing dams have many drawbacks. Traditional reinforcement structures use on-site concrete pouring, which enhances strength by building new concrete layers on or inside the dam surface. This method can, to some extent, prevent dams from collapsing in the short term and maintain their basic water-retaining function. However, on-site concrete pouring is complex and requires a large investment of manpower, resources, and time. Construction requires the erection of formwork, mixing, and transportation of concrete. The entire process is greatly affected by external factors. Moreover, traditional reinforcement components are large and heavy, lacking flexibility during installation. High requirements are placed on machinery during handling and installation. In areas with complex terrain, the construction difficulty increases significantly. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a modular prefabricated dam reinforcement structure, which aims to improve the problems of the complex process of on-site concrete pouring, which requires a large amount of manpower, material resources and time, and the large size and weight of the reinforcement components, which lacks flexibility during installation.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a modular prefabricated dam reinforcement structure, including transverse support rods and multiple wave-breaking blocks. Multiple longitudinal sleeve rods are fixedly connected to the top of the transverse support rods. Multiple connecting columns are fixedly connected to the top of each wave-breaking block at equal intervals. Multiple slots are equidistantly provided at the bottom of each wave-breaking block. A protrusion 1 is fixedly connected to the top left side of each wave-breaking block, and a protrusion 2 is fixedly connected to the bottom right side of each wave-breaking block. The protrusion 1 on the left side and the protrusion 2 on the right side engage with each other. Through holes are provided at the bottom of both protrusion 1 and protrusion 2. Multiple wave-breaking blocks pass through the corresponding through holes and are respectively inserted into the exterior of multiple longitudinal sleeve rods. A locking component is provided on the right side of the top wave-breaking block, and a fixing mechanism is provided at the bottom of the transverse support rods.

[0007] As a further description of the above technical solution:

[0008] The fixing mechanism includes a circular sleeve. Two rotating grooves are opened on the outside of the transverse support rod. The circular sleeve is rotatably connected to the inside of the rotating grooves. A connecting plate is fixedly connected to the bottom of the circular sleeve. Tapered holes are opened at the front and rear ends of the top of the connecting plate. Fixing nails penetrate through the inside of the two tapered holes. Multiple anti-reverse spikes are fixedly connected at equal intervals to the outside of the two fixing nails.

[0009] As a further description of the above technical solution:

[0010] The locking assembly includes two fixing bolts. The right side of the anti-wave block has two hidden holes, and the right side of the longitudinal sleeve has two threaded holes. Fixing bolts pass through the interior of both hidden holes, and the ends of the two fixing bolts are threaded into the interior of the two threaded holes respectively.

[0011] As a further description of the above technical solution:

[0012] Both fixing bolts have hexagonal grooves on their right ends, and the outer sides of both hexagonal grooves are chamfered.

[0013] As a further description of the above technical solution:

[0014] The front and rear top sides of the wave-damping block are provided with transport grooves, and the interior of both transport grooves adopts an arc-shaped design.

[0015] As a further description of the above technical solution:

[0016] The rear side of the wave-damping block has multiple weight-reducing holes, all of which are diamond-shaped.

[0017] As a further description of the above technical solution:

[0018] The annular sleeve is fixedly connected to multiple diagonal braces on both its front and rear sides, and the bottom ends of the multiple diagonal braces are respectively fixedly connected to the top front and rear sides of the connecting plate.

[0019] As a further description of the above technical solution:

[0020] The tops of both fixing pins are designed in a flat conical shape, and the tops of the two fixing pins are respectively matched with the dimensions of the two conical holes.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the wave-damping blocks are connected by a longitudinal sleeve rod, and the wave-damping blocks are stacked with the connecting column and the slot, so that the first and second protrusions on the left and right sides are horizontally engaged. The through hole is fitted into the longitudinal sleeve rod, and the top wave-damping block is locked with a fixing bolt. This achieves the effect of constructing a stable and efficient dam reinforcement structure, which can effectively disperse the impact force of water flow, reduce damage to the dam body, enhance the flood control capacity of the dam, and is convenient to install and has a stable structure.

[0023] 2. In this utility model, the rotating groove on the horizontal support rod is rotatably connected to the circular sleeve. The circular sleeve is rotated according to the terrain of the dam, so that the connecting plate fits the dam. Then, the conical hole of the connecting plate guides the insertion of the fixing nail. At the same time, the anti-reverse spike goes deep into the soil with the fixing nail and plays an anti-reverse role. This achieves the effect of flexible and stable installation of the horizontal support rod. It can adapt to various types of dams with different terrains and angles, improves installation efficiency, and enhances the overall protection performance of the dam. Attached Figure Description

[0024] Figure 1 This is a structural illustration of a modular prefabricated dam reinforcement structure proposed in this utility model;

[0025] Figure 2 This is a structural breakdown diagram of the fixing bolts in a modular prefabricated dam reinforcement structure proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the fixing mechanism in a modular prefabricated dam reinforcement structure proposed in this utility model;

[0027] Figure 4 This is a schematic diagram of the rotating groove in a modular prefabricated dam reinforcement structure proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the hexagonal groove in a modular prefabricated dam reinforcement structure proposed in this utility model.

[0029] Legend:

[0030] 1. Horizontal support rod; 2. Fixing mechanism; 201. Circular sleeve; 202. Rotating groove; 203. Connecting plate; 204. Tapered hole; 205. Fixing nail; 206. Anti-reverse spike; 3. Longitudinal sleeve rod; 4. Anti-wave block; 5. Connecting column; 6. Slot; 7. Protrusion one; 8. Protrusion two; 9. Through hole; 10. Hidden hole; 11. Threaded hole; 12. Fixing bolt; 13. Hexagonal groove; 14. Transport groove; 15. Weight reduction hole; 16. Diagonal brace. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0032] Reference Figure 1 , Figure 2 and Figure 4 This utility model provides an embodiment of a modular prefabricated dam reinforcement structure, comprising a transverse support rod 1 and multiple wave-breaking blocks 4. Multiple longitudinal sleeve rods 3 are fixedly connected to the top of the transverse support rod 1. Multiple connecting columns 5 are fixedly connected to the top of the wave-breaking blocks 4 at equal intervals. Multiple slots 6 are equidistantly provided at the bottom of the wave-breaking blocks 4. A protrusion 7 is fixedly connected to the top left side of the wave-breaking block 4, and a protrusion 8 is fixedly connected to the bottom right side of the wave-breaking block 4. The left protrusion 7 and the right protrusion 8 engage with each other, and the bottoms of both protrusion 7 and protrusion 8 are... A through hole 9 is provided, and multiple anti-wave blocks 4 pass through the corresponding through holes 9 to the outside of multiple longitudinal sleeve rods 3. A locking component is provided on the right side of the top anti-wave block 4. The locking component includes two fixing bolts 12. Two hidden holes 10 are provided on the right side of the anti-wave block 4. Two threaded holes 11 are provided on the right side of the longitudinal sleeve rod 3. Fixing bolts 12 pass through the interior of the two hidden holes 10. The ends of the two fixing bolts 12 are threaded into the interior of the two threaded holes 11 respectively. A fixing mechanism 2 is provided at the bottom of the transverse support rod 1.

[0033] Specifically, during dam reinforcement work, the horizontal support rod 1 is securely fixed to the location of the dam requiring reinforcement using the fixing mechanism 2. Multiple longitudinal sleeve rods 3 are fixedly connected to the top of the horizontal support rod 1, serving as connecting components for the installation of the wave-breaking blocks 4. Multiple connecting columns 5 are fixedly connected at equal intervals to the top of the wave-breaking blocks 4. During installation, these columns can cooperate with multiple slots 6 equidistantly opened at the bottom of the upper layer of wave-breaking blocks 4, enabling the wave-breaking blocks 4 to be stacked layer by layer, thus forming a tight protective structure. The wave-breaking blocks 4 are connected to each other via a protrusion 7 on the top left side and a connection to the bottom right side. The protrusions 8 engage with each other to connect adjacent wave-damping blocks 4 horizontally, enhancing the overall integrity and stability of the reinforcement structure in the horizontal direction. The through holes 9 at the bottom of protrusions 7 and 8 allow multiple wave-damping blocks 4 to pass through the exterior of multiple longitudinal sleeves 3. The longitudinal sleeves 3 not only provide vertical positioning and support for the wave-damping blocks 4 but also further enhance their stability after installation, preventing displacement when subjected to water flow impact. After installing the top wave-damping blocks 4, the locking assembly... The device is locked in place by two fixing bolts 12. Two hidden holes 10 on the right side of the wave-breaking block 4 correspond to two threaded holes 11 on the right side of the longitudinal sleeve rod 3. The two fixing bolts 12 are passed through the two hidden holes 10 respectively, and their ends are threaded into the two threaded holes 11. By tightening the fixing bolts 12, the wave-breaking block 4 at the top is tightly fixed to the longitudinal sleeve rod 3, preventing the wave-breaking block 4 at the top from loosening or shifting during use, and ensuring the stability and reliability of the entire reinforcement structure. When water flows into the dam, the protective structure composed of the wave-breaking blocks 4 can effectively disperse and block the impact force of the water flow. The special shape and connection method of the wave-breaking blocks 4 allow the energy of the water flow to be dispersed and absorbed by multiple wave-breaking blocks 4 when it impacts, reducing the direct impact on the dam body. At the same time, the support structure composed of the transverse support rod 1 and the longitudinal sleeve rod 3 can provide stable support for the wave-breaking blocks 4, ensuring that the wave-breaking blocks 4 will not collapse or shift when subjected to water flow impact, thereby achieving effective reinforcement of the dam, improving the flood control capacity of the dam, and protecting the surrounding areas from flooding.

[0034] Reference Figure 1 , Figure 3 and Figure 4 The fixing mechanism 2 includes a circular sleeve 201. Two rotating grooves 202 are opened on the outside of the transverse support rod 1. The circular sleeve 201 is rotatably connected to the inside of the rotating grooves 202. A connecting plate 203 is fixedly connected to the bottom of the circular sleeve 201. A tapered hole 204 is opened at both the front and rear ends of the top of the connecting plate 203. A fixing nail 205 passes through the inside of the two tapered holes 204. Multiple anti-reverse spikes 206 are fixedly connected at equal intervals on the outside of the two fixing nails 205.

[0035] Specifically, during the installation of the transverse support rod 1, two rotating grooves 202 are opened on the outside of the transverse support rod 1, and the annular sleeve 201 is rotatably connected inside the rotating grooves 202, allowing the annular sleeve 201 to rotate freely around the transverse support rod 1. When it is necessary to fix the transverse support rod 1 to the embankment, the annular sleeve 201 can be rotated and its position adjusted according to the terrain of the embankment and the actual installation requirements, so that the connecting plate 203 fixedly connected to its bottom can fit against the embankment surface. The conical holes 204 opened at the front and rear ends of the top of the connecting plate 203 provide precise positioning and guidance for the installation of the fixing nail 205. The fixing nail 205 is inserted from the top of the conical hole 204. The shape of the conical hole 204 helps to guide the fixing nail 205 to be inserted vertically downward into the embankment. During the insertion process, the multiple anti-reverse spikes 206 fixedly connected at equal intervals on the outside of the fixing nail 205 can gradually penetrate into the embankment as the fixing nail 205 is inserted. The interaction between the 06 and the soil inside the dam allows its special structure to be tightly embedded in the surrounding medium when subjected to upward tension, effectively preventing the fixing nail 205 from coming out of the dam. By passing two fixing nails 205 through two conical holes 204 and firmly nailing them into the dam, the connecting plate 203 is stably fixed to the dam. Since the annular sleeve 201 is rotatably connected to the transverse support 1 and the connecting plate 203 is fixed to the dam, the transverse support 1 is firmly fixed in the position of the dam to be reinforced through the connection between the annular sleeve 201 and the connecting plate 203. This not only adapts to dams with different terrains and ensures the flexibility of the installation of the transverse support 1, but also ensures the stability of the fixation through the synergistic effect of the fixing nail 205 and the anti-retraction spike 206. This lays the foundation for the subsequent installation of the longitudinal sleeve 3 and the wave-breaking block 4 to build a complete dam reinforcement structure and ensures the reliability of the entire reinforcement structure in subsequent use.

[0036] Reference Figure 2 , Figure 3 and Figure 5 The right ends of the two fixing bolts 12 are provided with hexagonal grooves 13, and the outer sides of the two hexagonal grooves 13 are chamfered. The front and rear top sides of the anti-wave block 4 are provided with transport grooves 14, and the interior of the two transport grooves 14 is arc-shaped. The rear side of the anti-wave block 4 is provided with multiple weight reduction holes 15, and the multiple weight reduction holes 15 are diamond-shaped. The front and rear sides of the annular sleeve 201 are fixedly connected with multiple diagonal braces 16, and the bottom ends of the multiple diagonal braces 16 are fixedly connected to the front and rear top sides of the connecting plate 203 respectively. The tops of the two fixing nails 205 are both flat conical, and the tops of the two fixing nails 205 are respectively matched with the dimensions of the two conical holes 204.

[0037] Specifically, for the two fixing bolts 12, the hexagonal groove 13 on their right end facilitates installation and disassembly. When screwing the fixing bolt 12 into or out of the threaded hole 11, a hexagonal wrench can be inserted into the hexagonal groove 13, and the torque of the wrench can be used to rotate the bolt. The chamfer design on the outer side of the hexagonal groove 13 makes it easier to align when inserting the wrench, reducing the difficulty of operation and improving the efficiency of installation and disassembly. The transport groove 14 on the top of the front and rear sides of the anti-wave block 4 adopts an arc design, which fits the operator's hand. When transporting the anti-wave block 4, whether it is manual or manual, the transport groove 14 is easy to handle. With the aid of mechanical tools, the transport groove 14 provides a point of leverage for gripping or connection. The arc-shaped design disperses the pressure during transport, preventing damage to the wave-damping block 4 and improving stability during transport. This facilitates the transport of the wave-damping block 4 to the designated location for installation. The multiple diamond-shaped weight-reducing holes 15 on the rear side of the wave-damping block 4 reduce its weight while ensuring the structural strength of the wave-damping block 4. When impacted by water flow, the lighter wave-damping block 4 reduces the pressure on the transverse support rod 1 and the longitudinal sleeve rod 3, reducing the burden on the support structure. Furthermore, the weight-reduced wave-damping block 4... The installation and handling process is more convenient, reducing the cost of manpower and machinery. Multiple diagonal braces 16 are fixedly connected to the front and rear sides of the circular sleeve 201, with their bottom ends fixedly connected to the top front and rear sides of the connecting plate 203, enhancing the connection stability between the circular sleeve 201 and the connecting plate 203. When the transverse support 1 is subjected to vibration or displacement caused by water flow, the diagonal braces 16 can distribute the force to the connecting plate 203. Through the principle of triangular stability, the deformation resistance of the entire fixing mechanism 2 is enhanced, ensuring that the transverse support 1 is firmly fixed to the dam. The tops of the two fixing nails 205 are designed with flat conical shapes and their dimensions match the two conical holes 204. During installation, the flat conical tops are easier to align with the conical holes 204. During insertion, because their shape fits the conical holes 204, the fixing nails 205 can be better guided to be inserted vertically downward into the embankment. This not only improves the accuracy of installation but also reduces the possibility of the fixing nails 205 shifting during insertion, ensuring that the fixing nails 205 can be smoothly driven into the embankment. Together with the anti-reverse spikes 206, it enhances the fixing effect of the fixing mechanism 2 on the transverse support rod 1.

[0038] Working principle: The fixing mechanism 2 securely fixes the transverse support rod 1 to the location of the dam requiring reinforcement. Multiple longitudinal sleeve rods 3 are fixedly connected to the top of the transverse support rod 1, serving as connecting components for the installation of the wave-breaking blocks 4. Multiple connecting columns 5 are fixedly connected at equal intervals to the top of the wave-breaking blocks 4. During installation, these columns can cooperate with multiple slots 6 equidistantly opened at the bottom of the upper layer of wave-breaking blocks 4, enabling the wave-breaking blocks 4 to be stacked layer by layer, thus forming a tight protective structure. The wave-breaking blocks 4 are connected by interlocking protrusion 7 on the top left and protrusion 8 on the bottom right, connecting adjacent wave-breaking blocks 4 horizontally and enhancing the overall integrity and stability of the entire reinforcement structure in the horizontal direction. Through holes 9 opened at the bottom of protrusions 7 and 8 are used to pass multiple wave-breaking blocks 4 through the multiple longitudinal sleeve rods 3. Externally, the longitudinal sleeve 3 not only provides vertical positioning and support for the wave-damping block 4, but also further enhances the stability of the wave-damping block 4 after installation, making it less prone to displacement when subjected to water flow impact. After the top wave-damping block 4 is installed, it is locked by a locking assembly. The locking assembly includes two fixing bolts 12. The two hidden holes 10 on the right side of the wave-damping block 4 correspond to the two threaded holes 11 on the right side of the longitudinal sleeve 3. The two fixing bolts 12 are respectively passed through the two hidden holes 10, and their ends are threaded into the inside of the two threaded holes 11. By tightening the fixing bolts 12, the top wave-damping block 4 is tightly fixed to the longitudinal sleeve 3, preventing the top wave-damping block 4 from loosening or displacing during use, and ensuring the stability and reliability of the entire reinforcement structure.

[0039] Furthermore, two rotating slots 202 are opened on the outside of the transverse support rod 1, and the annular sleeve 201 is rotatably connected inside the rotating slots 202, allowing the annular sleeve 201 to rotate freely around the transverse support rod 1. When it is necessary to fix the transverse support rod 1 to the embankment, the annular sleeve 201 can be rotated and its position adjusted according to the terrain of the embankment and the actual installation requirements, so that the connecting plate 203 fixedly connected to its bottom can fit against the embankment surface. The tapered holes 204 opened at the front and rear ends of the top of the connecting plate 203 are for the installation of the fixing nails 205. The device provides precise positioning and guidance, allowing the fixing nail 205 to be inserted from the top of the conical hole 204. The shape of the conical hole 204 helps guide the fixing nail 205 to be inserted vertically downward into the embankment. During the insertion process, multiple anti-retraction spikes 206, which are equidistantly fixed to the outside of the fixing nail 205, can gradually penetrate the embankment as the fixing nail 205 penetrates deeper. The anti-retraction spikes 206 interact with the soil inside the embankment, so that their special structure can be tightly embedded in the surrounding medium when subjected to upward tension, effectively preventing the fixing nail 205 from coming out of the embankment.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular prefabricated dam reinforcement structure, comprising transverse support rods (1) and multiple wave-breaking blocks (4), characterized in that: The top of the transverse support rod (1) is fixedly connected to multiple longitudinal sleeve rods (3), the top of the wave-damping block (4) is fixedly connected to multiple connecting posts (5) at equal intervals, the bottom of the wave-damping block (4) is provided with multiple slots (6) at equal intervals, the top left side of the wave-damping block (4) is fixedly connected to a protrusion one (7), the bottom right side of the wave-damping block (4) is fixedly connected to a protrusion two (8), the protrusion one (7) on the left side and the protrusion two (8) on the right side are engaged with each other, the bottom of the protrusion one (7) and the protrusion two (8) are both provided with through holes (9), the multiple wave-damping blocks (4) pass through the outside of the multiple longitudinal sleeve rods (3) through the corresponding through holes (9), a locking component is provided on the right side of the top wave-damping block (4), and a fixing mechanism (2) is provided at the bottom of the transverse support rod (1).

2. The modular prefabricated dam reinforcement structure according to claim 1, characterized in that: The fixing mechanism (2) includes a circular sleeve (201). Two rotating grooves (202) are opened on the outside of the transverse support rod (1). The circular sleeve (201) is rotatably connected to the inside of the rotating grooves (202). A connecting plate (203) is fixedly connected to the bottom of the circular sleeve (201). The front and rear ends of the top of the connecting plate (203) are provided with conical holes (204). Fixing nails (205) penetrate through the inside of the two conical holes (204). Multiple anti-reverse spikes (206) are fixedly connected at equal intervals on the outside of the two fixing nails (205).

3. The modular prefabricated dam reinforcement structure according to claim 1, characterized in that: The locking assembly includes two fixing bolts (12), the anti-wave block (4) has two hidden holes (10) on the right side, the longitudinal sleeve (3) has two threaded holes (11) on the right side, the two hidden holes (10) are each penetrated by a fixing bolt (12), and the ends of the two fixing bolts (12) are respectively threaded into the two threaded holes (11).

4. The modular prefabricated dam reinforcement structure according to claim 3, characterized in that: Both of the fixing bolts (12) have hexagonal grooves (13) on their right ends, and the outer sides of both hexagonal grooves (13) are chamfered.

5. The modular prefabricated dam reinforcement structure according to claim 1, characterized in that: The front and rear top sides of the wave-damping block (4) are provided with transport grooves (14), and the interior of the two transport grooves (14) is designed with an arc shape.

6. The modular prefabricated dam reinforcement structure according to claim 1, characterized in that: The wave-damping block (4) has multiple weight-reducing holes (15) on its rear side, and all of the multiple weight-reducing holes (15) adopt a diamond-shaped design.

7. A modular prefabricated dam reinforcement structure according to claim 2, characterized in that: The annular sleeve (201) is fixedly connected to multiple diagonal braces (16) on both the front and rear sides, and the bottom ends of the multiple diagonal braces (16) are respectively fixedly connected to the top front and rear sides of the connecting plate (203).

8. A modular prefabricated dam reinforcement structure according to claim 2, characterized in that: The tops of the two fixing pins (205) are both designed in a flat conical shape, and the tops of the two fixing pins (205) are respectively matched with the dimensions of the two conical holes (204).

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