Embedded device with a corrosion-resistant outer end

Abstract

This utility model relates to the field of building embedded accessories, specifically to a pre-embedded device with an anti-corrosion outer end, which includes an external embedded part (1) and an internal embedded rod body (2). The external embedded part (1) is a stainless steel rod or a stainless steel cylinder. The stainless steel rod is a stainless steel smooth rod, a stainless steel screw, a stainless steel ordinary threaded bar, a stainless steel precision threaded bar, or an iron-based shape memory alloy. The internal embedded rod body (2) is a carbon steel threaded rod, a carbon steel ordinary threaded bar, or a carbon steel precision threaded bar. One end face of the external embedded part (1) is abutted against one end face of the internal embedded rod body (2) and fixed together by friction and pressure welding. The other end of the external embedded part (1) is an exposed end, and a threaded part (11) integral with the external embedded part (1) is provided on the exposed end. This utility model not only helps to control costs, but also greatly reduces the probability of corrosion during use, thereby helping to maintain high positioning strength for a long time, thus extending service life and reducing safety hazards; and it can also greatly reduce the probability of nuts getting stuck, making subsequent disassembly and maintenance of outdoor facilities more convenient.

Description

1. Description of a Pre-embedded Device with Corrosion-Resistant Outer End Technical Field This utility model relates to the field of outdoor facility fixing accessories, and in particular to a pre-embedded device for fixing outdoor facilities. Background Art Currently, in order to stably fix outdoor facilities (road railings, road noise barriers, streetlights, billboards, etc.) to a base, a component for locking the outdoor facility is constructed by embedding several threaded rods in the base. Specifically, this is achieved as follows: one end of the threaded rod is embedded in the base, while the other end is exposed outside the base; the support leg of the outdoor facility is fitted onto the other end of the threaded rod; a nut is screwed onto the other end of the threaded rod, so that the support leg is clamped and positioned by the nut and the base; this achieves the positioning of the outdoor facility. To ensure reliable positioning strength, the threaded rod is often made of a large length, with most of it embedded in the base. While this method ensures reliable positioning strength for threaded rods, the large number of threaded rods used in most cases leads to the widespread use of low-cost, non-corrosion-resistant ordinary threaded rods to control costs. Although this controls costs, ordinary threaded rods exposed to outdoor environments are highly susceptible to rust. This corrosion can reduce the structural strength of the exposed parts of the rod, decreasing its reliability and lifespan, creating safety hazards, and causing the exposed threads to seize up the nuts, significantly hindering the disassembly and maintenance of outdoor facilities. Therefore, it is essential to design a pre-embedded device with a corrosion-resistant outer end to address these technical problems. The purpose of this invention is to solve the above-mentioned problems and shortcomings, and to provide a pre-embedded device with an anti-corrosion outer end. This pre-embedded device with an anti-corrosion outer end not only helps to control costs, but also greatly reduces the chance of rust during use, thereby helping to maintain high positioning strength for a long time, thus extending service life and reducing safety hazards; in addition, it can also greatly reduce the chance of nuts getting stuck, making subsequent disassembly and maintenance of outdoor facilities more convenient. The technical solution of this utility model is implemented as follows: a pre-embedded device with an anti-corrosion outer end, characterized in that it includes an outer embedded part and an inner embedded rod body, wherein the outer embedded part is a stainless steel rod or a stainless steel cylinder, the stainless steel rod being a stainless steel smooth rod, a stainless steel threaded rod, a stainless steel ordinary threaded bar, a stainless steel precision threaded bar, or an iron-based shape memory alloy, and the inner embedded rod body is a carbon steel threaded rod, a carbon steel ordinary threaded bar, or a carbon steel precision threaded bar. One end face of the outer embedded part abuts against one end face of the inner embedded rod body and is fixed together by friction and pressure welding. The other end of the outer embedded part is an exposed end, and the exposed end is provided with a threaded part integral with the outer embedded part. Preferably, the other end of the inner embedded rod body is bent to form a gripping part. Preferably, a force-reinforcing plate is provided on the other end of the inner embedded rod body.Preferably, the embedded rod body includes at least two embedded rods, which are detachably connected together in sequence. Preferably, a connecting assembly is provided between adjacent embedded rods, allowing them to be detachably connected together. The connecting assembly includes a threaded joint and a threaded sleeve with one end closed. One end of the threaded joint and the sealed end of the threaded sleeve are respectively fused to the ends of two adjacent embedded rods by friction and pressure. The threaded sleeve is screwed onto the threaded joint. Preferably, the two ends of the threaded joint are a cylindrical end and a conical end, respectively. The larger end of the conical end is connected to one end of the cylindrical end, and the other end face of the cylindrical end is abutted against and fused together with the end face of the embedded rod. A tapered external thread is formed on the circumferential surface of the conical end, and the inner hole of the threaded sleeve is a tapered threaded hole that matches the tapered external thread. Preferably, a nut connector is provided between adjacent embedded rods, allowing them to be detachably connected. The nut connector includes a threaded connector and two nuts, each located at one end of the threaded connector and screwed onto the ends of adjacent embedded rods. Preferably, when the external embedded part is a stainless steel rod, the threaded connection is an integral threaded rod body; when the external embedded part is a stainless steel cylinder, the threaded connection is an internal thread formed on the inner wall of the stainless steel cylinder. Preferably, at least two inner sleeves are fitted onto the inner rod body. Each inner sleeve includes two tubes and several arc-shaped limiting pieces. The two tubes are fitted onto the inner rod body, and the arc-shaped limiting pieces are arranged in a ring array around the inner rod body, with the middle of each arc-shaped limiting piece bent away from the inner rod body. Furthermore, the two ends of each arc-shaped limiting piece are connected to the two tubes. Preferably, the external embedded part is a threaded rod of D4-80, D4-100, A4-80, A4-100, or C1-100 according to the international standard ISO 3506-1. The beneficial effects of this utility model are: the embedded device with an anti-corrosion outer end uses an external embedded part and an internal embedded rod body, with the external embedded part being a stainless steel rod or stainless steel cylinder, and the stainless steel rod being a stainless steel smooth rod, stainless steel screw, stainless steel threaded steel, stainless steel precision-rolled threaded steel, or iron-based shape memory alloy; the internal embedded rod body (HK 30137249 A 3) is ordinary threaded steel; and the other end of the external embedded part is an exposed end. This assembly structure not only provides high corrosion resistance to the exposed parts of the embedded device but also reduces the manufacturing cost of the embedded portion, thus controlling the overall manufacturing cost. During use, the device significantly reduces the likelihood of rust, ensuring long-term high positioning strength, extending service life, and reducing safety hazards. Furthermore, it greatly reduces the chance of nuts jamming, making subsequent disassembly and maintenance of outdoor facilities more convenient.By abutting one end face of the external embedded part against one end face of the internal embedded rod and fixing them together by friction and pressure welding, the connection between the external embedded part and the internal embedded rod is not only facilitated but also ensured to be comprehensive and stable. This guarantees a stable and reliable connection between the external embedded part and the internal embedded rod, thereby improving the reliability of the pre-embedded device. This not only ensures higher positioning strength but also extends the service life of the pre-embedded device and reduces safety hazards. A screw connection integrated with the external embedded part is provided on the exposed end, providing a stable and reliable screw connection position, facilitating the stable installation of related outdoor facilities, and further enhancing the reliability and applicability of the pre-embedded device. This invention can produce anchor products for soil or rock slope reinforcement and strengthening; or pre-embedded screw products or screw components for fixing outdoor facilities, offering long service life, low cost, and significant market competitive advantages. Figure 1 is one of the structural schematic diagrams of the pre-embedded device in this invention. Figure 2 is a second structural schematic diagram of the pre-embedded device in this utility model. Figure 3 is a third structural schematic diagram of the pre-embedded device in this utility model. Figure 4 is a first structural schematic diagram of the pre-embedded device in use in this utility model. Figure 5 is a second structural schematic diagram of the pre-embedded device in use in this utility model. Figure 6 is a third structural schematic diagram of the pre-embedded device in use in this utility model. Figure 7 is a fourth structural schematic diagram of the pre-embedded device in use in this utility model. Figure 8 is a fifth structural schematic diagram of the pre-embedded device in use in this utility model. Figure 9 is a sixth structural schematic diagram of the pre-embedded device in use in this utility model. Figure 10 is a seventh structural schematic diagram of the pre-embedded device in use in this utility model. Figure 11 is a fourth structural schematic diagram of the pre-embedded device in this utility model. Figure 12 is a disassembled structural schematic diagram of the embedded rod body in this utility model. Figure 13 is a fifth structural schematic diagram of the pre-embedded device in this utility model. Figure 14 is a sixth structural schematic diagram of the pre-embedded device in this utility model. Figure 15 is a seventh structural schematic diagram of the pre-embedded device in this utility model. HK 30137249 A 4 Figure 16 is a structural schematic diagram of the pre-embedded device in this utility model (Figure 8). Figure 17 is a structural schematic diagram of the pre-embedded device in this utility model (Figure 9). Figure 18 is a structural schematic diagram of the pre-embedded device in this utility model (Figure 10). Figure 19 is a structural schematic diagram of the pre-embedded device in this utility model (Figure 11). Figure 20 is a structural schematic diagram of the nut connector in the connection state in this utility model. Figure 21 is a structural schematic diagram of the pre-embedded device in the usage state in this utility model (Figure 8). Figure 22 is a structural schematic diagram of the pre-embedded device in the usage state in this utility model (Figure 9).As shown in Figures 1 to 3, 11, and 13 to 5, the present invention provides a pre-embedded device with an anti-corrosion outer end, comprising an outer embedded part 1 and an inner embedded rod body 2. The outer embedded part 1 is a stainless steel rod or a stainless steel cylinder, wherein the stainless steel rod is a stainless steel smooth rod, a stainless steel screw, a stainless steel ordinary threaded bar, a stainless steel precision threaded bar, or an iron-based shape memory alloy. The inner embedded rod body 2 is a carbon steel threaded rod, a carbon steel ordinary threaded bar, or a carbon steel precision threaded bar. One end face of the outer embedded part 1 is abutted against and fixed together with one end face of the inner embedded rod body 2 by friction and pressure welding. The other end of the outer embedded part 1 is an exposed end, and a threaded part 11 integral with the outer embedded part 1 is provided on the exposed end. The embedded device with an anti-corrosion outer end employs an external embedded part 1 and an internal embedded rod body 2. The external embedded part 1 is made of stainless steel rod or stainless steel cylinder, and the stainless steel rod can be a stainless steel smooth rod, stainless steel screw rod, stainless steel threaded bar, stainless steel precision-rolled threaded bar, or iron-based shape memory alloy. The internal embedded rod body 2 is made of ordinary threaded bar, and the other end of the external embedded part 1 is exposed. This assembly structure not only gives the exposed part of the embedded device high corrosion resistance but also helps to reduce the manufacturing cost of the embedded part, thereby controlling the overall manufacturing cost of the embedded device. During use, the embedded device significantly reduces the probability of rust, which helps maintain high positioning strength over a long period, thus extending its service life and reducing safety hazards. Furthermore, this design greatly reduces the probability of the nut jamming, making subsequent disassembly and maintenance of outdoor facilities more convenient. Furthermore, iron-based shape memory alloys (Fe-SMA) can be selected as the external embedded parts. Fe-SMA is a novel smart material, a shape memory alloy with iron as its main component. Through temperature increases, deformation caused by external forces can completely recover its ultimate strength and elastic modulus. The resulting stress recovery stability greatly avoids prestress loss in the corrosion-resistant external embedded device, facilitating the recovery of losses and measurement of the corresponding prestress. This is achieved by abutting one end face of the external embedded part 1 against one end face of the internal embedded rod 2 and fixing them together through friction and pressure welding. This not only facilitates the connection between the external embedded part 1 and the internal embedded rod 2, but also ensures a very comprehensive and stable connection between the external embedded part 1 and the internal embedded rod 2. This helps to ensure that the connection between the external embedded part 1 and the internal embedded rod 2 is very stable and reliable, thereby improving the reliability of the pre-embedded device. This not only ensures that the pre-embedded device has higher positioning strength, but also extends the service life of the pre-embedded device and further reduces safety hazards during use.A threaded connection 11, integrated with the embedded part 1, is provided on the exposed end, offering a highly stable and reliable connection position. This facilitates the stable installation of related outdoor facilities and enhances the reliability and applicability of the embedded device. The stainless steel screw is a stainless steel threaded rod, made of materials conforming to international standard ISO 3506-1, such as D4-80, D4-100, A4-80, A4-100, or C1-100. The material of the ordinary stainless steel threaded bar conforms to British standard BS 6744, such as 1.4362 or 1.4404. The material of the stainless steel precision threaded bar conforms to EU standard EN 10088, such as 1.4362 or 1.4404; the material of the stainless steel precision threaded bar can also be martensitic steel C1-100. This design ensures a highly reliable structure between the embedded part 1 and the threaded connection 11, better meeting the needs of practical applications. The carbon steel threaded rod is a carbon steel grade 8.8 or carbon steel grade 10.9 threaded rod; the carbon steel ordinary threaded steel uses PSB500, PSB600, PSB830, PSB930, PSB1080, or PSB1200 strength grades. The outer wall of the carbon steel ordinary threaded steel is provided with a hot-dip galvanized anti-corrosion coating, but in actual manufacturing, this coating may be omitted. This ensures the carbon steel ordinary threaded steel has a highly reliable structure, thus better meeting the needs of practical use. The carbon steel precision-rolled threaded steel uses PSB500, PSB830, PSB930, PSB1080, or PSB1200 strength grades. The outer wall of the carbon steel precision-rolled threaded steel is provided with a hot-dip galvanized anti-corrosion coating, but in actual manufacturing, this coating may be omitted. Such high-strength carbon steel threaded bars possess a highly reliable structure, thus better meeting the needs of practical applications. The friction welding utilizes the heat generated by the contact and rotational friction between one end face of the outer embedded part 1 and one end face of the inner embedded rod 2 as a heat source. Furthermore, the friction welding is achieved by plastic deformation of the one end face of the outer embedded part 1 and the one end face of the inner embedded rod 2 under the pressure of their approaching contact. This ensures a highly stable and reliable connection between the outer embedded part 1 and the inner embedded rod 2. As shown in Figures 11 and 13 to 15, when the stainless steel rod is a stainless steel threaded bar, the other end of the stainless steel threaded bar directly forms the threaded connection part 11, thus quickly meeting manufacturing and usage requirements. As shown in Figures 16 to 19, when the outer embedded part 1 is a stainless steel threaded bar, the threaded connection part 11 can be directly formed by the spiral protrusions on the outer embedded part 1, thus reducing processing difficulty and ensuring strength.As shown in Figures 1 and 3, the other end of the embedded rod 2 is bent to form a gripping part 21. The gripping part 21 enhances the gripping force with the concrete during installation, thereby improving the stability and reliability of the installation positioning, and further contributing to the improved reliability and applicability of the pre-embedded device. As shown in Figures 1 and 3, the gripping part 21 is bent at a 90-degree angle, which allows it to perform a highly reliable limiting function. As shown in Figures 11, 13 to 19, 21, and 22, a stainless steel plate 10 is fitted onto the screw connection 11. This effectively enhances the structural strength of the contact point of the outdoor facility using the stainless steel plate 10, thereby further improving the stability and reliability of the outdoor facility installation positioning. As shown in Figures 11, 13 to 19, 21, and 22, the stainless steel plate 10 has a thickness of 20mm and is a square stainless steel plate. The center of the stainless steel plate 10 is fitted onto the threaded connection 11, and the width of the stainless steel plate 10 is more than 4.5 times larger than the diameter of the threaded connection 11. This design gives the stainless steel plate 10 a more reliable and applicable structure, thus facilitating a more stable and reliable positioning and reinforcement effect on outdoor facilities, and further improving the reliability of outdoor facility installation and positioning. As shown in Figure 2, a reinforcing plate 22 is provided on the other end of the embedded rod 2. During installation, the reinforcing plate 22 not only enhances the bond strength with the concrete but also connects multiple embedded devices together, thereby enhancing the stability and reliability of the embedded rod 2 installation, and further improving the reliability and applicability of the embedded device. As shown in Figures 7, 9, and 10, during actual installation, a single reinforcing plate 22 can be installed on one embedded rod 2, or multiple embedded rods 2 can share a single reinforcing plate 22; additionally, connecting plates 20 can be used to connect the reinforcing plates 22 on adjacent embedded rods 2. This provides mutual reinforcement and limiting, thereby further improving the stability and reliability of the pre-embedded device's installation and positioning. As shown in Figures 7, 9, and 10, the reinforcing plate 22 can be welded and fixed to the embedded rod 2, or external threads can be formed on the embedded rod 2, and two or more nuts can be used to clamp and position the reinforcing plate 22 on the embedded rod 2. This ensures a stable connection between the reinforcing plate 22 and the embedded rod 2, thus meeting the requirements of actual manufacturing and use. As shown in Figures 11, 12 and 20, the embedded rod body 2 includes at least two embedded rods 23, and each embedded rod 23 is detachably connected together in sequence.This allows for the pre-production of embedded rods 23 when the embedded rod body 2 is of greater length. These rods are then transported to the site and assembled into the embedded rod body 2 using the embedded rods 23, improving the convenience of packaging, factory storage management, and transportation of long embedded rod bodies 2. As shown in Figure 11, a connecting assembly 3 is provided between adjacent embedded rods 23, enabling them to be detachably connected. The connecting assembly 3 includes a threaded joint 31 and a threaded sleeve 32 with one end closed. One end of the threaded joint 31 and the sealed end of the threaded sleeve 32 are respectively fused and welded to the ends of two adjacent embedded rods 23. The threaded sleeve 32 is screwed onto the threaded joint 31. This connecting assembly 3 not only effectively enhances the connection strength between the embedded rods 23 but also facilitates assembly, thereby further improving the reliability and applicability of the pre-embedded device. As shown in Figures 11 and 12, the two ends of the threaded connector 31 are a cylindrical end 311 and a conical end 312, respectively. The larger end of the conical end 312 is connected to one end of the cylindrical end 311, and the other end face of the cylindrical end 311 is abutted against the end face of the embedded rod 23 and fixed together by friction and pressure welding. A tapered external thread 313 is formed on the circumferential surface of the conical end 312, and the inner hole of the threaded connector sleeve 32 is a tapered threaded hole 321 that matches the tapered external thread 313. The cylindrical end 311 facilitates the stable clamping and positioning of the threaded connector 31 by the fixture during friction and pressure welding, which helps to improve the convenience and quality of friction and pressure welding. The tapered external thread 313 and the tapered threaded hole 321 not only meet the requirements of stable threaded connection, but also make the threaded connection process more convenient and faster, thereby helping to further improve the assembly efficiency of the embedded rod body 2 and thus help to shorten the on-site construction time. As shown in Figure 12, the embedded rod 23 is made of ordinary threaded steel, and the cylindrical end 311 and the conical end 312 are integral steel structures. The threaded sleeve 32 is a steel cylinder, which facilitates the assembly of the embedded rod body 2 with high structural strength and durability. As shown in Figure 20, a nut connector 5 is provided between adjacent embedded rods 23, allowing them to be detachably connected. The nut connector 5 includes a threaded tube 51 and two nuts 52. The two nuts 52 are respectively located at both ends of the threaded tube 51 and are screwed onto the ends of adjacent embedded rods 23. The nuts 52 can be used as wrenches, and the threaded tube 51 provides sufficient threading depth.The nut connector 5 effectively enhances the connection strength between the embedded rods 23 and facilitates assembly, thereby improving the reliability and applicability of the pre-embedded device. The two nuts 52 can be welded to the threaded connector 51 or positioned by simply pressing the two ends of the threaded connector 51 together, thus meeting the requirements for a stable connection. As shown in Figures 11 and 12, the connecting component 3 is mainly used in the threading process of the embedded rod 23 using ordinary threaded steel; as shown in Figure 20, the nut connector 5 is mainly used in the threading process of the embedded rod 23 using fine-threaded steel. The threads in the threaded connector 51 and the two nuts 52 match the spiral protrusions on the outer wall of the fine-threaded steel, allowing the threaded connection to be achieved using the spiral protrusions on the outer wall of the fine-threaded steel without the need for excessive machining of the embedded rod 23. This not only reduces machining difficulty but also ensures a very stable and reliable threaded connection. As shown in Figures 1 to 3, when the external embedded part 1 is a stainless steel rod, the threaded part 11 is a threaded rod body integrated with the external embedded part 1; when the external embedded part 1 is a stainless steel cylinder, the threaded part 11 is an internal thread formed on the inner wall of the stainless steel cylinder. This enables the threaded part 11 to have very high reliability, thereby facilitating a very stable and reliable threading effect, and further helping to improve the reliability and applicability of the pre-embedded device. As shown in Figures 4 to 9, when the threaded part 11 is a screw rod, the support leg 30 of the outdoor facility is fitted onto the threaded part 11, and a nut is used to screw the threaded part to achieve locking. When the threaded part 11 is an internal thread, a screw 40 or a threaded rod 50 is inserted through the support leg 30, so that the screw 40 is screwed onto the threaded part 11 to achieve locking, and at least two nuts are screwed onto the threaded rod 50 to achieve clamping and positioning. This satisfies normal installation and positioning requirements. The stainless steel cylinder is an A4-80 or D4-80 stainless steel cylinder, and the screw connection 11 can be used with stainless steel bolts to fix relevant outdoor facilities, thus better meeting the needs of actual use. As shown in Figures 13 and 14, the friction-welded joint between the outer embedded part 1 and the inner embedded rod 2 has an annular flash 60 formed by friction-welding. The annular flash 60 not only improves the strength of the embedded positioning but also further ensures that the outer embedded part 1 and the inner embedded rod 2 have high connection strength, thereby helping to further improve the applicability and reliability of the pre-embedded device. As shown in Figures 13 to 15, when the outer embedded part 1 is a stainless steel screw, the end where the outer embedded part 1 connects to the inner embedded rod 2 is a round rod head 12 without threads.The round rod head 12 not only provides a good clamping position for the fixture during friction welding, but also facilitates more accurate and stable friction welding of the outer embedded part 1 and the inner embedded rod body 2, which helps to ensure the quality of friction welding. As shown in Figure 11, at least two inner sleeves 4 are fitted on the inner embedded rod body 2; the inner sleeve 4 includes two sleeves 41 and several arc-shaped limiting pieces 42. The two sleeves 41 are fitted on the inner embedded rod body 2, and the arc-shaped limiting pieces 42 are arranged in a ring array around the inner embedded rod body 2, with the middle part of each arc-shaped limiting piece 42 bent away from the inner embedded rod body 2, and the two ends of each arc-shaped limiting piece 42 are respectively connected to the two sleeves 41. This design allows the embedded rod 2 to be installed into the pre-drilled hole in the base, preventing it from contacting the hole wall via the arc-shaped limiting piece 42. This ensures that when cement grout is injected into the hole to fix the embedded rod 2, it is accurately positioned in the center of the hole, guaranteeing uniform coverage and accurate, stable positioning. This improves the convenience and accuracy of the installation and positioning of the pre-embedded device. The external embedded part 1 is a threaded rod conforming to the international standard ISO 3506-1, specifically D4-80, D4-100, A4-80, A4-100, or C1-100. This not only facilitates the manufacturing of the pre-embedded device but also gives the external embedded part 1 very high structural strength, further enhancing the reliability and applicability of the pre-embedded device. The threaded rod can be either standard thread or coarse thread; both meet the needs of practical use. The present invention can produce soil nailing anchor products for foundation pit support, slope reinforcement, and initial tunnel support, as well as rock anchor products for rock slope stabilization, tunnel surrounding rock support, and mine roadway reinforcement, as shown in Figures 11 to 22 of the structural schematic diagrams; or it can also produce pre-embedded screw products or screw component products for fixing outdoor facilities, as shown in Figures 1 to 10 of the structural schematic diagrams. All of these products have long service life, low cost, and significant market competitive advantages.HK 30137249 A 1 Claim 1. A pre-embedded device with an anti-corrosion outer end, characterized in that: it includes an outer embedded part (1) and an inner embedded rod body (2), wherein the outer embedded part (1) is a stainless steel rod or a stainless steel cylinder, the stainless steel rod is a stainless steel smooth rod or a stainless steel screw or a stainless steel ordinary threaded bar or a stainless steel precision threaded bar or an iron-based shape memory alloy, the inner embedded rod body (2) is a carbon steel threaded bar or a carbon steel ordinary threaded bar or a carbon steel precision threaded bar, one end face of the outer embedded part (1) is abutted against one end face of the inner embedded rod body (2) and fixed together by friction and pressure welding, the other end of the outer embedded part (1) is an exposed end, and a threaded part (11) integral with the outer embedded part (1) is provided on the exposed end. 2. The pre-embedded device with an anti-corrosion outer end according to claim 1, characterized in that: the other end of the inner embedded rod body (2) is bent to form a holding part (21). 3. The pre-embedded device with anti-corrosion outer end according to claim 1, characterized in that: a force-reinforcing plate (22) is provided on the other end of the inner embedded rod body (2). 4. The pre-embedded device with anti-corrosion outer end according to claim 1, characterized in that: the inner embedded rod body (2) includes at least two embedded rods (23), and each embedded rod (23) is detachably connected together in sequence. 5. The pre-embedded device with anti-corrosion outer end according to claim 4, characterized in that: a connecting component (3) is provided between adjacent embedded rods (23), and adjacent embedded rods (23) are detachably connected together through the connecting component (3); the connecting component (3) includes a threaded joint (31) and a threaded sleeve (32) with one end closed, one end of the threaded joint (31) and the sealing end of the threaded sleeve (32) are respectively rubbed and fused to the ends of two adjacent embedded rods (23), and the threaded sleeve (32) is threaded onto the threaded joint (31). 6. The pre-embedded device with anti-corrosion outer end according to claim 5 is characterized in that: the two ends of the screw connector (31) are a cylindrical end (311) and a conical end (312) respectively, the large end of the conical end (312) is connected to one end of the cylindrical end (311), the other end face of the cylindrical end (311) is close to the end face of the embedded rod (23) and is fixed together by friction and welding, a tapered external thread (313) is provided on the circumferential surface of the conical end (312), and the inner hole of the screw connector (32) is a tapered thread hole (321) that matches the tapered external thread (313).7. The pre-embedded device with anti-corrosion outer end according to claim 4, characterized in that: a nut connector (5) is provided between adjacent embedded rods (23), and the adjacent embedded rods (23) are detachably connected together by the nut connector (5); the nut connector (5) includes a threaded pipe (51) and two nuts (52), the two nuts (52) are respectively provided on the two ends of the threaded pipe (51), the two nuts (52) are respectively screwed on the ends of the adjacent embedded rods (23), and the two ends of the threaded pipe (51) are respectively screwed on the ends of the adjacent embedded rods (23). 8. The pre-embedded device with anti-corrosion outer end according to claim 1, characterized in that: when the outer embedded part (1) is a stainless steel rod, the threaded part (11) is a threaded rod body integral with the outer embedded part (1); when the outer embedded part (1) is a stainless steel cylinder, the threaded part (11) is an internal thread opened on the inner wall of the stainless steel cylinder. 9. The pre-embedded device with anti-corrosion outer end according to claim 1, characterized in that: at least two inner sleeves (4) are fitted on the inner rod body (2); the inner sleeve (4) includes two sleeves (41) and a plurality of arc-shaped limiting pieces (42), the two sleeves (41) are fitted on the inner rod body (2), and each arc-shaped limiting piece (42) is arranged in a ring array around the inner rod body (2), and the middle part of each arc-shaped limiting piece (42) is bent away from the inner rod body (2), and the two ends of each arc-shaped limiting piece (42) are respectively connected to the two sleeves (41). 10. The pre-embedded device with anti-corrosion outer end according to claim 1, characterized in that: the outer embedded part (1) is a D4-80 or D4-100 or A4-80 or A4-100 or C1-100 threaded rod of international standard ISO 3506-1.HK 30137249 A 1 Instruction Manual Attachments Figure 1 HK 30137249 A 2 Figure 2 Figure 3 HK 30137249 A 3 Figure 4 HK 30137249 A 4 Figure 5 HK 30137249 A 5 Figure 6 HK 30137249 A 6 Figure 7 HK 30137249 A 7 Figure 8 HK 30137249 A 8 Figure 9 HK 30137249 A 9 Figure 10 HK 30137249 A 10 Figure 11 HK 30137249 A 11 Figure 12 HK 30137249 A 12 Figure 13 HK 30137249 A 13 Figure 14 HK 30137249 A 14 Figure 15 HK 30137249 A 15 Figure 16 HK 30137249 A 16 Figure 17 HK 30137249 A 17 Figure 18 HK 30137249 A 18 Figure 19 HK 30137249 A 19 Figure 20 HK 30137249 A 20 Figure 21 HK 30137249 A 21 Figure 22 HK 30137249 A.