Embedded device with anti-corrosion outer end

Abstract

The utility model relates to the field of building embedded assembly parts, in particular to a pre-embedded device with an anti-corrosion outer end, which comprises an outer embedded part and an inner embedded rod body, the outer embedded part is a stainless steel rod or a stainless steel cylinder, and the stainless steel rod is a stainless steel polished rod or a stainless steel screw rod or stainless steel common deformed steel bar or stainless steel finish rolling deformed steel bar. The embedded rod body is a carbon steel threaded rod or a carbon steel common deformed steel bar or a carbon steel finish rolling deformed steel bar, one end face of the outer embedded part and one end face of the embedded rod body are attached to each other and fixed together in a friction pressure welding mode, the other end of the outer embedded part is an exposed end, and a threaded connection part integrated with the outer embedded part is arranged at the exposed end. According to the utility model, not only can the cost be controlled, but also the corrosion probability can be greatly reduced during use, so that the high positioning strength can be kept for a long time, the service life can be prolonged, and the potential safety hazard can be reduced; and moreover, the probability that the nut is stuck can be greatly reduced, and subsequent disassembly and maintenance of outdoor facilities are more convenient.

Description

Technical Field

[0001] 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 Technology

[0002] Currently, in order to stably fix outdoor facilities (road railings, road noise barriers, streetlights, billboards, etc.) to the base, a component has emerged that embeds several threaded rods in the base to form a locking mechanism for the outdoor facilities. 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 legs of the outdoor facility are 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 legs are clamped and positioned by the nut and the base; this achieves the positioning of the outdoor facilities.

[0003] To ensure reliable positioning strength, threaded rods are often made with a large length, with most of them embedded in the base. While this ensures reliable positioning strength, 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 rust reduces the structural strength of the exposed portion of the rod, decreasing its reliability and lifespan, creating safety hazards, and causing the exposed threads to seize up the nut, significantly hindering the subsequent disassembly and maintenance of outdoor facilities.

[0004] Therefore, it is essential to design a pre-embedded device with a corrosion-resistant outer end to solve the aforementioned technical problems. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned problems and shortcomings by providing a pre-embedded device with an anti-corrosion outer end. This pre-embedded device with an anti-corrosion outer end not only helps control costs but also greatly reduces the probability of rust during use, thereby maintaining high positioning strength over a long period, extending service life, and reducing safety hazards. Furthermore, it can significantly reduce…

[0006] The reduced likelihood of the nuts getting stuck makes subsequent disassembly and maintenance of outdoor facilities easier.

[0007] 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 is a stainless steel smooth rod or a stainless steel screw rod or a stainless steel ordinary threaded bar or a stainless steel precision rolled threaded bar, the inner embedded rod body is a carbon steel threaded bar or a carbon steel ordinary threaded bar or a carbon steel precision rolled threaded bar, one end face of the outer embedded part is abutted against one end face of the inner embedded rod body and 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.

[0008] Preferably, the other end of the embedded rod is bent to form a gripping part.

[0009] Preferably, a force-adding plate is provided on the other end of the embedded rod.

[0010] Preferably, the embedded rod body includes at least two embedded rods, which are detachably connected together in sequence.

[0011] Preferably, a connecting assembly is provided between adjacent embedded rods, and the adjacent embedded rods are detachably connected together by the connecting assembly; the connecting assembly includes a threaded joint and a threaded sleeve with one end closed, one end of the threaded joint and the sealing end of the threaded sleeve are respectively rubbed and fused to the ends of two adjacent embedded rods, and the threaded sleeve is screwed onto the threaded joint.

[0012] Preferably, the two ends of the screw connector are a cylindrical end and a conical end, respectively. The large 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 the end face of the embedded rod and fixed together by friction and welding. A tapered external thread is formed on the circumferential surface of the conical end, and the inner hole of the screw connector is a tapered threaded hole that matches the tapered external thread.

[0013] Preferably, a nut connector is provided between adjacent embedded rods, and the adjacent embedded rods are detachably connected together through the nut connector; the nut connector includes a threaded tube and two nuts, the two nuts are respectively provided on the two ends of the threaded tube, the two nuts are respectively screwed onto the ends of the adjacent embedded rods, and the two ends of the threaded tube are respectively screwed onto the ends of the adjacent embedded rods.

[0014] Preferably, when the embedded part is a stainless steel rod, the threaded connection is a threaded rod body integral with the embedded part; when the embedded part is a stainless steel cylinder, the threaded connection is an internal thread formed on the inner wall of the stainless steel cylinder.

[0015] Preferably, at least two limiting sleeves are fitted on the embedded rod body; the limiting sleeve includes two sleeves and several arc-shaped limiting pieces. The two sleeves are fitted on the embedded rod body, and the arc-shaped limiting pieces are arranged in a ring array around the embedded rod body, with the middle part of each arc-shaped limiting piece bent away from the embedded rod body, and the two ends of each arc-shaped limiting piece connected to the two sleeves respectively.

[0016] 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.

[0017] The beneficial effects of this utility model are as follows: The embedded device with an anti-corrosion outer end employs an external embedded part and an internal embedded rod. The external embedded part is made of stainless steel rod or stainless steel cylinder, and the stainless steel rod can be a smooth stainless steel rod, a stainless steel screw, a stainless steel threaded bar, or a stainless steel precision-rolled threaded bar. The internal embedded rod is made of ordinary threaded bar, and the other end of the external embedded part 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 greatly reduces the probability of the nut jamming, making subsequent disassembly and maintenance of outdoor facilities more convenient. The external embedded part is fixed together by abutting and fusion welding one end face against the internal embedded rod face. This not only facilitates the connection between the external embedded part and the internal embedded rod, but also ensures a comprehensive and stable connection, thereby guaranteeing a stable and reliable connection and 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 during use. The exposed end features an integrated bolted connection with the external embedded part, providing a stable and reliable bolted 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 bolt products for soil or 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. Attached Figure Description

[0018] Figure 1 This is one of the structural schematic diagrams of the pre-embedded device in this utility model.

[0019] Figure 2 This is the second structural schematic diagram of the pre-embedded device in this utility model.

[0020] Figure 3 This is the third schematic diagram of the pre-embedded device in this utility model.

[0021] Figure 4 This is one of the structural schematic diagrams of the pre-embedded device in use in this utility model.

[0022] Figure 5 This is the second structural schematic diagram of the pre-embedded device in use in this utility model.

[0023] Figure 6 This is the third structural schematic diagram of the pre-embedded device in use in this utility model.

[0024] Figure 7 This is the fourth structural schematic diagram of the pre-embedded device in use in this utility model.

[0025] Figure 8 This is the fifth structural schematic diagram of the pre-embedded device in use in this utility model.

[0026] Figure 9 This is the sixth structural schematic diagram of the pre-embedded device in use in this utility model.

[0027] Figure 10 This is the seventh structural schematic diagram of the pre-embedded device in use in this utility model.

[0028] Figure 11 This is the fourth structural schematic diagram of the pre-embedded device in this utility model.

[0029] Figure 12 This is a schematic diagram of the disassembled structure of the embedded rod in this utility model.

[0030] Figure 13 This is the fifth schematic diagram of the pre-embedded device in this utility model.

[0031] Figure 14 This is the sixth schematic diagram of the pre-embedded device in this utility model.

[0032] Figure 15 This is the seventh schematic diagram of the pre-embedded device in this utility model.

[0033] Figure 16 This is the eighth schematic diagram of the pre-embedded device in this utility model.

[0034] Figure 17 This is the ninth structural schematic diagram of the pre-embedded device in this utility model.

[0035] Figure 18 This is the tenth structural schematic diagram of the pre-embedded device in this utility model.

[0036] Figure 19This is diagram eleven of the pre-embedded devices in this utility model.

[0037] Figure 20 This is a structural schematic diagram of the nut connector in the connection state of this utility model.

[0038] Figure 21 This is the eighth structural schematic diagram of the pre-embedded device in use in this utility model.

[0039] Figure 22 This is the ninth structural schematic diagram of the pre-embedded device in use in this utility model. Detailed Implementation

[0040] like Figures 1 to 3 , Figure 11 , Figures 13 to 5 As shown, the pre-embedded device with corrosion-resistant outer end of this utility model includes 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. The stainless steel rod is a stainless steel smooth rod, a stainless steel screw, a stainless steel ordinary threaded bar, or a stainless steel precision-rolled threaded bar. The inner embedded rod body 2 is a carbon steel threaded rod, a carbon steel ordinary threaded bar, or a carbon steel precision-rolled 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 is 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.

[0041] 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 smooth stainless steel rod, a stainless steel threaded rod, a stainless steel threaded bar, or a stainless steel precision-rolled threaded bar. 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. In addition, iron-based shape memory alloys can be selected as external embedded parts here. Iron-based shape memory alloy (Fe-SMA) is a new type of smart material. It is a shape memory alloy material with iron as the main constituent element. When the temperature rises, the deformation caused by external force can completely restore its ultimate strength and elastic modulus. The resulting stress recovery stability performance greatly avoids the prestress loss of the embedded device at the corrosion-resistant outer end, and facilitates the recovery of loss and measurement of the corresponding prestress.

[0042] 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 by friction and pressure welding, the connection between the external embedded part 1 and the internal embedded rod 2 can be facilitated and made very comprehensive and stable. This ensures a stable and reliable connection between the external embedded part 1 and the internal embedded rod 2, 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 its service life and further reduces safety hazards during use.

[0043] A screw connection 11, which is integrated with the embedded part 1, is provided on the exposed end. This provides a very stable and reliable screw connection position, which is conducive to the stable installation of related outdoor facilities and makes the embedded device more reliable and applicable.

[0044] The stainless steel screw is a stainless steel threaded rod, and the material of the stainless steel threaded rod is D4-80, D4-100, A4-80, A4-100, or C1-100 according to international standard ISO3506-1. The material of the stainless steel ordinary threaded bar is 1.4362 or 1.4404 according to British standard BS 6744. The material of the stainless steel precision-rolled threaded bar is 1.4362 or 1.4404 according to EU standard EN 10088; the material of the stainless steel precision-rolled threaded bar can also be martensitic steel C1-100. This ensures that the embedded part 1 and the threaded connection 11 have a highly reliable structure, thereby better meeting the needs of practical use.

[0045] The carbon steel threaded rod is either a carbon steel grade 8.8 or a 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 that the carbon steel ordinary threaded steel has a highly reliable structure, thus better meeting the needs of practical use.

[0046] The carbon steel precision-rolled threaded bars are made of PSB500, PSB830, PSB930, PSB1080, and PSB1200 strength grades. A hot-dip galvanized anti-corrosion coating is applied to the outer wall of the carbon steel precision-rolled threaded bars; however, in actual manufacturing, this coating may be omitted. Such carbon steel precision-rolled threaded bars possess a highly reliable structure, thus better meeting the needs of practical applications.

[0047] 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. It also causes plastic deformation of one end face of the outer embedded part 1 and one end face of the inner embedded rod 2 under the pressure of their proximity to each other to achieve friction welding. This enables the outer embedded part 1 and the inner embedded rod 2 to be connected together in a very stable and reliable manner.

[0048] like Figure 11 , Figures 13 to 15 As shown, when the stainless steel rod is a stainless steel screw, the other end of the stainless steel screw is used to form the threaded part 11, which can quickly meet the needs of manufacturing and use.

[0049] like Figures 16 to 19 As shown, when the embedded part 1 is a stainless steel threaded bar, the threaded part 11 can be directly formed by the spiral protrusion on the embedded part 1, which can reduce the processing difficulty and ensure the strength.

[0050] like Figure 1 and Figure 3 As shown, the other end of the embedded rod 2 is bent to form a gripping part 21. The gripping part 21 can enhance the gripping force between the rod and the concrete during installation, thereby enhancing the stability and reliability of the installation and positioning, and further improving the reliability and applicability of the pre-embedded device.

[0051] like Figure 1 and Figure 3 As shown, the gripping part 21 is bent at 90 degrees, which enables the gripping part 21 to play a very reliable limiting role.

[0052] like Figure 11 , Figures 13 to 19 , Figure 21 and Figure 22 As shown, a stainless steel plate 10 is fitted onto the screw connection 11. This stainless steel plate 10 effectively enhances the structural strength of the contact point of the outdoor facility, thereby further improving the stability and reliability of the outdoor facility's installation and positioning.

[0053] like Figure 11 , Figures 13 to 19 , Figure 21 and Figure 22 As shown, 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 part 11, and the width of the stainless steel plate 10 is more than 4.5 times larger than the diameter of the threaded connection part 11. This design allows the stainless steel plate 10 to have a more reliable and applicable structure, thereby facilitating a more stable and reliable positioning and reinforcement effect on outdoor facilities, and further improving the reliability of outdoor facility installation and positioning.

[0054] like Figure 2As shown, 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 pre-embedded devices together, thereby enhancing the stability and reliability of the embedded rod 2, and further improving the reliability and applicability of the pre-embedded device.

[0055] like Figure 7 , Figure 9 and Figure 10 As shown, during actual installation, a reinforcing plate 22 can be installed on one embedded rod 2, or multiple embedded rods 2 can share one reinforcing plate 22; additionally, a connecting plate 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.

[0056] like Figure 7 , Figure 9 and Figure 10 As shown, the force-adding plate 22 can be welded and fixed to the embedded rod 2, or an external thread can be formed on the embedded rod 2, and the force-adding plate 22 can be clamped and positioned on the embedded rod 2 using two or more nuts. This ensures a stable connection between the force-adding plate 22 and the embedded rod 2, thus meeting the needs of actual manufacturing and use.

[0057] like Figure 11 , Figure 12 and Figure 20 As shown, the embedded rod body 2 includes at least two embedded rods 23, which are detachably connected together in sequence. This allows for the pre-production of the embedded rods 23 when the embedded rod body 2 is of a larger length, and then the rods can be transported to the site and assembled into the embedded rod body 2 using the embedded rods 23. This improves the convenience of packaging, factory storage management, and transportation of long embedded rod bodies 2.

[0058] like Figure 11 As shown, a connecting assembly 3 is provided between adjacent embedded rods 23, allowing them to be detachably connected together. The connecting assembly 3 includes a threaded connector 31 and a threaded sleeve 32 with one end closed. One end of the threaded connector 31 and the sealed end of the threaded sleeve 32 are respectively fused to the ends of two adjacent embedded rods 23 by friction and pressure. The threaded sleeve 32 is screwed onto the threaded connector 31. This connecting assembly 3 not only effectively enhances the connection strength between the embedded rods 23 but also facilitates assembly, thereby helping to further improve the reliability and applicability of the pre-embedded device.

[0059] like Figure 11 and Figure 12As shown, 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 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.

[0060] like Figure 12 As shown, the embedded rod 23 is made of ordinary threaded steel, the cylindrical end 311 and the conical end 312 are integral steel structures, and the threaded cylinder 32 is a steel cylinder. This facilitates the assembly of the embedded rod body 2 to have high structural strength and durability.

[0061] like Figure 20 As shown, a nut connector 5 is provided between adjacent embedded rods 23, allowing them to be detachably connected. The nut connector 5 includes a threaded connector 51 and two nuts 52. The two nuts 52 are respectively located at both ends of the threaded connector 51 and are screwed onto the ends of adjacent embedded rods 23, thus connecting both ends of the threaded connector 51 to the ends of adjacent embedded rods 23. The nuts 52 can be used as wrenches, and the threaded connector 51 provides sufficient threading depth. This nut connector 5 not only effectively enhances the connection strength between the embedded rods 23 but also facilitates assembly, thereby contributing to further improving the reliability and applicability of the pre-embedded device.

[0062] The two nuts 52 can be fixed to the threaded pipe 51 by welding, or they can be used to tighten the two ends of the threaded pipe 51 respectively to achieve positioning, thus meeting the requirements of stable connection.

[0063] like Figure 11 and Figure 12 As shown, the connecting component 3 is mainly used in the screwing process of the embedded rod 23 using ordinary threaded steel; as Figure 20As shown, the nut connector 5 is mainly used in the screwing process of the embedded rod 23 using fine-rolled threaded steel. The threads in the screw connector 51 and the two nuts 52 are matched with the spiral protrusions on the outer wall of the fine-rolled threaded steel. In this way, the screwing can be achieved by utilizing the spiral protrusions on the outer wall of the fine-rolled threaded steel, without the need for excessive processing of the embedded rod 23. This not only helps to reduce the processing difficulty, but also ensures that the screwing is very stable and reliable.

[0064] like Figures 1 to 3 As shown, when the embedded part 1 is a stainless steel rod, the threaded connection part 11 is a threaded rod body integral with the embedded part 1; when the embedded part 1 is a stainless steel cylinder, the threaded connection part 11 is an internal thread formed on the inner wall of the stainless steel cylinder. This enables the threaded connection part 11 to have very high reliability, thereby facilitating a very stable and reliable threaded connection effect, and further helping to improve the reliability and applicability of the pre-embedded device.

[0065] like Figures 4 to 9 As shown, when the threaded part 11 is a screw, the support leg 30 of the outdoor facility is fitted onto the threaded part 11 and locked by screwing the threaded part with a nut. 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 into the threaded part 11 for locking, and at least two nuts are screwed onto the threaded rod 50 for clamping and positioning. This meets the normal installation and positioning requirements.

[0066] The stainless steel cylinder is an A4-80 stainless steel cylinder or a D4-80 stainless steel cylinder. The screw connection 11 can be used with stainless steel bolts to fix related outdoor facilities, which can better meet the needs of actual use.

[0067] like Figure 13 and Figure 14 As shown, 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.

[0068] like Figures 13 to 15 As shown, when the external embedded part 1 is a stainless steel screw, the end of the external embedded part 1 that connects with the internal embedded rod body 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 between the external embedded part 1 and the internal embedded rod body 2, which helps to ensure the quality of friction welding.

[0069] like Figure 11As shown, at least two limiting sleeves 4 are fitted onto the embedded rod body 2. Each limiting sleeve 4 includes two sleeves 41 and several arc-shaped limiting pieces 42. The two sleeves 41 are fitted onto the embedded rod body 2, and the arc-shaped limiting pieces 42 are arranged in a ring array around the embedded rod body 2, with the middle of each arc-shaped limiting piece 42 bent away from the embedded rod body 2. Furthermore, the two ends of each arc-shaped limiting piece 42 are connected to the two sleeves 41 respectively. This prevents the embedded rod body 2 from contacting the hole wall when it is embedded into the pre-drilled hole in the base. This ensures that when cement grout is injected into the hole to fix the embedded rod body 2, the embedded rod body 2 is accurately positioned in the center of the hole, ensuring that the injected cement grout is evenly distributed, thus achieving accurate and stable positioning. This, in turn, improves the convenience and accuracy of the installation and positioning of the pre-embedded device.

[0070] The external embedded part 1 is a threaded rod of D4-80, D4-100, A4-80, A4-100, or C1-100 according to the international standard ISO 3506-1. This not only facilitates the manufacturing of embedded devices by enterprises, but also gives the external embedded part 1 very high structural strength, thereby helping to further improve the reliability and applicability of the embedded device.

[0071] The threaded rod can be either a standard thread or a coarse thread; both can meet the needs of practical applications. This invention can produce soil nail 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. Please refer to the structural schematic diagram. Figures 11 to 22 As shown in the diagram; alternatively, we can also produce pre-embedded screws or screw components for fixing outdoor facilities, as illustrated in the structural diagram. Figures 1 to 10 As shown, they all have long service life, low cost, and significant competitive advantages in the market.

Claims

1. A pre-embedded device with a corrosion-resistant outer end, characterized in that: It includes an external embedded part (1) and an internal embedded rod body (2), wherein 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 or a stainless steel screw or a stainless steel ordinary threaded bar or a stainless steel precision rolled threaded bar, the internal embedded rod body (2) is a carbon steel threaded bar or a carbon steel ordinary threaded bar or a carbon steel precision rolled threaded bar, one end face of the external embedded part (1) is close to one end face of the internal embedded rod body (2) and is fixed together by friction and 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.

2. The pre-embedded device with corrosion-resistant outer end according to claim 1, characterized in that: The other end of the embedded rod (2) is bent to form a gripping part (21).

3. The pre-embedded device with corrosion-resistant outer end according to claim 1, characterized in that: A force-adding plate (22) is provided on the other end of the embedded rod (2).

4. The pre-embedded device with corrosion-resistant outer end according to claim 1, characterized in that: The 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 corrosion-resistant outer end according to claim 4, characterized in that: A connecting assembly (3) is provided between adjacent embedded rods (23), and the adjacent embedded rods (23) are detachably connected together by the connecting assembly (3); the connecting assembly (3) includes a screw joint (31) and a screw sleeve (32) with one end closed. One end of the screw joint (31) and the sealing end of the screw sleeve (32) are respectively rubbed and fused to the ends of two adjacent embedded rods (23), and the screw sleeve (32) is screwed onto the screw joint (31).

6. The pre-embedded device with corrosion-resistant outer end according to claim 5, 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), and 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 corrosion-resistant outer end according to claim 4, characterized in that: A nut connector (5) is provided between adjacent embedded rods (23) to allow adjacent embedded rods (23) to be detachably connected together via 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 onto the ends of adjacent embedded rods (23), and the two ends of the threaded pipe (51) are respectively screwed onto the ends of adjacent embedded rods (23).

8. The pre-embedded device with corrosion-resistant outer end according to claim 1, characterized in that: When the embedded part (1) is a stainless steel rod, the threaded part (11) is a threaded rod body integral with the embedded part (1); when the 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 corrosion-resistant outer end according to claim 1, characterized in that: At least two limiting sleeves (4) are fitted on the embedded rod body (2); the limiting sleeve (4) includes two sleeves (41) and several arc-shaped limiting pieces (42). The two sleeves (41) are fitted on the embedded rod body (2), and the arc-shaped limiting pieces (42) are arranged in a ring array around the embedded rod body (2), and the middle part of each arc-shaped limiting piece (42) is bent away from the embedded 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 corrosion-resistant outer end according to claim 1, characterized in that: The embedded part (1) is a threaded rod of D4-80, D4-100, A4-80, A4-100 or C1-100 according to the international standard ISO 3506-1.

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