Prestressed concrete connecting piece

Abstract

The utility model relates to a prestressed concrete connecting piece which comprises a connector, a locking piece, a connecting part and a positioning cylinder, the connector comprises an outer screw head, a connecting rod and a conical screw head which are fixedly connected in sequence, the locking piece comprises a locking ring and a plurality of locking units, the prestressed concrete connecting piece further comprises a sealing piece, and the sealing piece comprises an upper sealing ring and a lower sealing ring. The upper sealing ring is tightly arranged on the outer sides of the upper portions of the locking units in a sleeving mode, the locking ring is tightly arranged on the outer sides of the middles of the locking units in a sleeving mode, and the outer walls of the middles of the locking units are correspondingly provided with containing grooves used for installing the locking ring in an embedded mode. The positioning cylinder is sequentially provided with a first positioning step and a second positioning step from top to bottom, the whole connecting part is of a circular tube structure with an upper end opening smaller than a lower end opening, the lower end face of the connecting part abuts against the upper step face of the first positioning step, and the lower sealing ring is supported on the upper step face of the second positioning step. When the conical screw head is connected with the locking piece in a coning mode, the lower sealing ring is arranged on the outer sides of the lower portions of the multiple locking units in a sleeving mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of prestressed concrete connection, in particular to a prestressed concrete connector. Background Art

[0002] With the continuous advancement of construction technology, people pay more and more attention to the importance of prestressed concrete connectors in improving the performance of connection parts in concrete structures, which has led to their increasing application in various large and complex structures, such as bridges, high-rise buildings, and large-span spatial structures.

[0003] Chinese invention patent CN202410591046.9 discloses a prestressed concrete connector, which includes a connector, a locking piece, a connecting part and a positioning cylinder. The connector includes a connecting rod, an outer screw head and a conical screw head. The conical screw head is conically connected to the locking piece. The locking piece includes a plurality of locking units. The plurality of locking units are annular and close to each other and combined into a circular tube structure. The locking piece also includes a locking ring, which is integrally sleeved on the outer wall of the bottom of the plurality of locking units; the connecting part includes an upper connecting piece and a lower connecting piece, and the positioning cylinder is sleeved outside the connecting part; the prestressed concrete connector effectively solves the technical problem in the prior art that the bolt is sometimes difficult to insert into the nut or the tightening process is slow due to the influence of various factors, and achieves the technical effect that when the connector and the locking piece are matched, the bolt can be more easily inserted into the locking piece and locked.

[0004] However, after the conical screw head and the locking member are tapered together in the above-mentioned prestressed concrete connector, a gap exists between the upper portion of the multiple locking units and the upper connector, resulting in a reduced sealing performance and poor sealing effect, which is not conducive to the long-term stable use of the prestressed concrete connector. Moreover, during assembly of the locking member, since the locking ring is integrally sleeved on the bottom outer wall of the multiple locking units, the upper portions of the multiple locking units are easily turned outward, making the assembly operation of the locking member inconvenient. Therefore, it is necessary to improve the structure of the existing prestressed concrete connector and provide a prestressed concrete connector with a reasonable design, good sealing effect, and easy assembly to solve the above-mentioned problems existing in the prior art. Utility Model Content

[0005] The purpose of the present invention is to address the deficiencies in the prior art and provide a prestressed concrete connector that can effectively improve the assembly convenience and sealing performance of the prestressed concrete connector, extend its service life, and reduce frequent maintenance and replacement due to sealing failure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A prestressed concrete connector, comprising a connector, a locking member, a connecting component and a positioning cylinder, wherein the connector comprises an outer screw head, a connecting rod and a conical screw head which are fixedly connected in sequence, the conical screw head is conically connected to the locking member, the locking member comprises a locking ring and a plurality of locking units, the locking unit is an arc-shaped block structure with a raised middle portion of the outer wall, the connecting component is sleeved inside the positioning cylinder and wrapped around the outside of the locking member, and the sealing member further comprises an upper sealing ring and a lower sealing ring, the upper sealing ring is tightly sleeved on the upper outer portion of the plurality of locking units On the other side, the locking ring is tightly sleeved on the middle outer side of multiple locking units, and the middle outer walls of multiple locking units are correspondingly provided with accommodating grooves for embedding and installing locking rings; the positioning cylinder is sequentially provided with a first positioning step and a second positioning step from top to bottom, and the connecting component as a whole is a circular tubular structure with an upper end opening smaller than a lower end opening. The lower end face of the connecting component contacts the upper step surface of the first positioning step, and the lower sealing ring is supported on the upper step surface of the second positioning step. When the conical screw head is conically connected with the locking piece, the lower sealing ring is sleeved on the lower outer side of the multiple locking units.

[0008] Furthermore, it also includes an outer sleeve, which is a circular tubular structure with an open upper end and a closed lower end. A supporting step is provided inside the outer sleeve. The outer sleeve is sleeved on the outside of the positioning sleeve and the upper step surface of the supporting step is in contact with the lower step surface of the first positioning step.

[0009] Preferably, when the conical screw head is conically connected to the locking member, the heights of the upper end surfaces of the locking member and the connecting component are both less than or equal to the height of the upper end surface of the outer sleeve.

[0010] Preferably, the outer sleeve and the positioning sleeve are both integrally formed of metal material.

[0011] Furthermore, it also includes a protective cover, the open end of the protective cover is provided with a radial fold extending outward, the opening of the protective cover is arranged downward and is fixedly connected to the upper end of the outer screw head.

[0012] Preferably, the number of the locking units is four, and the inner wall of the locking unit and the conical screw head are correspondingly provided with one-way teeth. The outer wall of the locking unit is arc-shaped, and a circular tube portion is extended upward from the upper end of the locking unit. The upper sealing ring is tightly sleeved on the outside of the circular tube portion, and a conical socket with a larger upper portion and a smaller lower portion is opened on the inner wall of the circular tube portion.

[0013] Furthermore, a compression step is radially protruded from the outer portion of the upper end of the connecting component, and the lower step surface of the compression step contacts the upper end surface of the positioning cylinder.

[0014] Furthermore, an upwardly extending edge extension portion is provided at the upper end of the positioning cylinder corresponding to the pressing step, and the height of the upper end surface of the edge extension portion is greater than or equal to the height of the upper step surface of the pressing step.

[0015] Preferably, the inner diameter of the upper opening of the positioning cylinder, the inner diameter of the first positioning step and the inner diameter of the second positioning step decrease in sequence.

[0016] Furthermore, a positioning space for limiting the insertion depth of the conical screw head is formed between the second positioning step and the inner wall of the lower end of the positioning cylinder.

[0017] Furthermore, the seal also includes an arc-shaped magnet, and a plurality of arc-shaped magnets are distributed in an annular manner to form a magnetic ring. The magnetic ring is fixedly mounted on the inner wall of the upper sealing ring and is magnetically connected to the locking member.

[0018] Preferably, positioning grooves are provided on the upper outer walls of the plurality of locking units corresponding to the arc-shaped magnets.

[0019] The utility model adopts the above technical solution and has the following technical effects:

[0020] The utility model significantly improves the sealing and buffering properties of the prestressed concrete connector by adding a sealing member, which helps to extend the service life and improve the stability and safety of the overall structure. Specifically, the sealing member includes an upper sealing ring and a lower sealing ring. Not only can the upper sealing ring be tightly sleeved on the upper outer side of multiple locking units when assembling the locking member to strengthen the fixation of the multiple locking units, but also after the conical screw head and the locking member are conically connected, the upper sealing ring can be used to seal the gap between the upper part of the multiple locking units and the connecting component, thereby improving the sealing effect and being conducive to the long-term stable use of the prestressed concrete connector. In addition, the lower sealing ring can also be used to play a buffering role in the process of inserting the conical screw head into the locking member, and after the conical screw head and the locking member are conically connected, it can be tightly sleeved on the lower part of the multiple locking units to further fix the multiple locking units, so that the locking member is fixed through the triple sleeve of the locking ring, the upper sealing ring and the lower sealing ring, and the assembly structure is more stable.

[0021] The positioning tube of the utility model is provided with a first positioning step and a second positioning step in sequence from top to bottom, which not only facilitates the lower end face of the connecting component to contact the upper step surface of the first positioning step, and the lower sealing ring is supported on the upper step surface of the second positioning step, thereby positioning the installation position of the connecting component and the lower sealing ring, but also can reduce the lower connecting part of the connecting component in the prior art, saving material and processing costs.

[0022] The present invention also solves the assembly difficulties of existing locking parts. By tightly sleeved the locking ring on the middle outer side of multiple locking units, it is more convenient to preliminarily fix the multiple locking units. Compared with the existing technology of sleeved the locking ring as a whole on the bottom outer wall of multiple locking units, it effectively avoids the situation where the upper part of the multiple locking units is turned outward and the lower part is warped inward when assembling the locking part, making the assembly operation of the locking part more convenient. Moreover, by correspondingly providing a receiving groove for embedding and installing the locking ring on the middle outer wall of the multiple locking units, not only can the receiving groove be used to more conveniently locate the sleeve position of the locking ring, but also the locking ring can be conveniently hidden and stored in the receiving groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art description. The following description is given with respect to the drawings:

[0024] Figure 1 This is a structural diagram of the connector before the locking member is inserted into Example 1 of the present utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the connector after the locking member is inserted into Example 1 of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the connector after the locking member is inserted into the embodiment 2 of the present utility model;

[0027] Figure 4 This is a structural diagram of the connector before the locking member is inserted into Example 3 of the present utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the connector after the locking member is inserted into Example 3 of the present utility model;

[0029] Figure 6 This is a schematic diagram of the three-dimensional structure of the locking member of the utility model;

[0030] Figure 7 This is a schematic diagram of the three-dimensional structure of the connecting component of the utility model;

[0031] Figure 8 This is a schematic diagram of the three-dimensional structure of the positioning cylinder of the utility model;

[0032] Figure 9 This is a schematic diagram of the three-dimensional structure of the outer sleeve of the utility model;

[0033] Figure 10 This is a schematic diagram of the three-dimensional structure of the protective cover of the utility model;

[0034] Figure 11This is a schematic diagram of the cross-sectional structure of the upper sealing ring in Example 4 of the present utility model;

[0035] In the picture:

[0036] 100. Connector; 110. Connecting rod; 120. External screw head; 130. Conical screw head; 200. Locking piece; 210. Locking unit; 211. Accommodating groove; 212. Circular tube; 213. Conical socket; 220. Locking ring; 300. Connecting part; 310. Pressing step; 400. Positioning cylinder; 410. First positioning step; 420. Second positioning step; 430. Edge extension; 440. Positioning space; 500. Sealing piece; 510. Upper sealing ring; 520. Lower sealing ring; 530. Arc magnet; 600. Outer sleeve; 610. Support step; 700. Protective cover; 710. Radial folding edge. DETAILED DESCRIPTION

[0037] The embodiments described below are only a portion of the embodiments of the present invention and do not represent all embodiments consistent with the present invention. The exemplary embodiments are described below in conjunction with the accompanying drawings: Example 1

[0038] See Figure 1-10 As shown in one, the utility model provides a prestressed concrete connector, which includes a connector 100, a locking member 200, a connecting component 300 and a positioning cylinder 400, the connector 100 includes a connecting rod 110, an outer screw head 120 and a conical screw head 130, the connecting rod 110 is a cylindrical straight rod as a whole, the conical screw head 130 is a truncated cone with an outer one-way tooth on the side wall, the end of the conical screw head 130 with a smaller area is fixedly connected to the lower end of the connecting rod 110, the conical screw head 130 is conically connected to the locking member 200, the outer screw head 120 is fixed to the upper end of the connecting rod 110, and the outer screw head 120 is fixed to the prefabricated part by threaded connection or welding; the locking member 200 includes a locking ring 220 and a plurality of locking units 210 The number of locking units 210 is three to five. The locking unit 210 is an arc-shaped block structure with a bulge in the middle of the outer wall. The inner wall of the locking unit 210 is provided with an internal one-way tooth that is compatible with the conical screw head 130. The locking ring 220 is a ring with a notch as a whole. The material of the locking ring 220 is elastic metal; the connecting component 300 is sleeved on the inside of the positioning cylinder 400 and wrapped around the outside of the locking member 200. The lower interior of the connecting component 300 has an arc-shaped surface that is compatible with the locking member 200. The positioning cylinder 400 is a hollow cylinder with an open upper end and a closed lower end. It should be noted that the above-mentioned connector 100, locking member 200, connecting component 300 and positioning cylinder 400 are all existing technologies in this field, and their structures and functions are no longer repeated.

[0039] See Figure 1 or Figure 2 As shown, in order to solve the problem of poor sealing effect caused by the gap between the upper part of the locking member 200 and the connecting member 300 after the conical screw head 130 and the locking member 200 are conically connected in the prior art, the present invention is provided with a sealing member 500, which significantly improves the sealing and buffering properties of the prestressed concrete connector, helps to extend the service life, and improves the stability and safety of the overall structure; Specifically, the sealing member 500 of the present invention includes an upper sealing ring 510 and a lower sealing ring 520, and the upper sealing ring 510 is tightly fitted into the lower sealing ring 520. It is located on the upper outer side of multiple locking units 210; the positioning cylinder 400 is sequentially provided with a first positioning step 410 and a second positioning step 420 from top to bottom, and the connecting component 300 as a whole is a circular tubular structure with an upper end opening smaller than a lower end opening. The lower end surface of the connecting component 300 is in contact with the upper step surface of the first positioning step 410, and the lower sealing ring 520 is supported on the upper step surface of the second positioning step 420. When the conical screw head 130 is conically connected with the locking member 200, the lower sealing ring 520 is sleeved on the lower outer side of the multiple locking units 210.

[0040] In this embodiment, the present invention can not only further fix the multiple locking units 210 by tightly sleeved on the upper outer sides of the multiple locking units 210, thereby improving the assembly convenience and structural stability of the locking member 200, but also can use the upper sealing ring 510 to seal the gap between the upper parts of the multiple locking units 210 and the connecting component 300 after the conical screw head 130 is conically connected with the locking member 200, thereby improving the sealing effect, which is beneficial to the prestressed concrete connection. Long-term stable use of the connecting parts; in addition, the lower sealing ring 520 can be utilized, so that it can not only play a buffering role in the process of inserting the conical screw head 130 into the locking member 200, but also can be tightly sleeved on the lower part of multiple locking units 210 after the conical screw head 130 and the locking member 200 are conically connected, so as to further fix the multiple locking units 210, so that the locking member 200 is fixed by the triple sleeve of the locking ring 220, the upper sealing ring 510 and the lower sealing ring 520, and the assembly structure is more stable.

[0041] Based on the above structure, preferably, the upper sealing ring 510 and the lower sealing ring 520 are both formed of high temperature resistant materials.

[0042] In order to solve the problem in the prior art that the upper parts of the locking units 210 are easily turned outward and the lower parts are warped inward during assembly of the locking piece 200, on the basis of the above structure, the utility model further provides corresponding receiving grooves 211 for embedding and installing locking rings 220 on the middle outer walls of the multiple locking units 210. The locking rings 220 are tightly sleeved on the middle outer sides of the multiple locking units 210 through the receiving grooves 211, so that the multiple locking units 210 can be preliminarily fixed more conveniently. Through the provided receiving grooves 211, it is not only possible to use the receiving grooves 211 to more conveniently locate the sleeve position of the locking ring 220, but also to facilitate the hiding and storage of the locking ring 220 in the receiving grooves 211.

[0043] Based on the above structure, preferably, the inner diameter of the locking ring 220 in the initial state is smaller than the outer diameter of the bottom of the accommodating groove 211 .

[0044] As a preferred embodiment, based on the above structure, preferably, the number of locking units 210 is four, and the inner wall of the locking unit 210 and the conical screw head 130 are correspondingly provided with one-way teeth. The outer wall of the locking unit 210 is arc-shaped, and a conical socket 213 with a larger upper part and a smaller lower part is provided on the inner wall of the circular tube portion 212, thereby playing a guiding role so that the conical screw head 130 can be inserted into the locking member 200.

[0045] On the basis of the above structure, further, a circular tube portion 212 extends upward from the upper end of the locking unit 210, and the upper sealing ring 510 is tightly sleeved on the outside of the circular tube portion 212; preferably, the inner diameter of the upper sealing ring 510 in the initial state is smaller than the outer diameter of the circular tube portion 212.

[0046] As a preferred embodiment, based on the above structure, further, a tightening step 310 is radially protruded from the outer upper end of the connecting component 300 , and the lower step surface of the tightening step 310 abuts against the upper end surface of the positioning cylinder 400 . Example 2

[0047] See Figure 3 As shown, based on any implementation method in the above-mentioned Example 1, in order to facilitate the use of existing technology to weld the positioning cylinder 400 to the concrete component for fixation, further, an upwardly extending edge extension portion 430 is provided at the upper end of the positioning cylinder 400 corresponding to the clamping step 310, and the upper end surface height of the edge extension portion 430 is greater than or equal to the upper step surface height of the clamping step 310.

[0048] On the basis of the above structure, preferably, the inner diameter of the upper opening of the positioning tube 400, the inner diameter of the first positioning step 410 and the inner diameter of the second positioning step 420 decrease in sequence.

[0049] On the basis of the above structure, preferably, a positioning space 440 for limiting the insertion depth of the conical screw head 130 is formed between the second positioning step 420 and the inner wall of the lower end of the positioning cylinder 400 .

[0050] In this embodiment, by improving the structure of the positioning tube 400, not only is it convenient for the lower end face of the connecting component 300 to contact the upper step surface of the first positioning step 410, and the lower sealing ring 520 is supported on the upper step surface of the second positioning step 420, thereby positioning the installation position of the connecting component 300 and the lower sealing ring 520, but also the lower connecting part of the connecting component 300 in the prior art can be reduced, saving material and processing costs. At the same time, the edge extension 430 can be used to facilitate the use of the existing technology in the field to fix the upper end of the positioning tube 400 with a riveted edge (riveted inward like a can) during use to prevent concrete from entering the interior or to weld the upper end of the positioning tube 400 to the concrete component for fixation. Example 3

[0051] See Figure 4 or Figure 5 As shown, based on any implementation in the above-mentioned Example 1, the present invention further includes an outer sleeve 600. The outer sleeve 600 is a circular tubular structure with an open upper end and a closed lower end. The interior of the outer sleeve 600 is provided with a support step 610 for positioning and supporting the positioning cylinder 400. The outer sleeve 600 is sleeved on the outside of the positioning cylinder 400 and the upper step surface of the support step 610 is in contact with the lower step surface of the first positioning step 410.

[0052] On the basis of the above structure, preferably, when the conical screw head 130 is conically connected with the locking member 200, the upper end surface heights of the locking member 200 and the connecting member 300 are both less than or equal to the upper end surface height of the outer sleeve 600, so that when in use, the upper end riveted edge of the outer sleeve 600 is fixed (riveted inward like a can) to prevent concrete from entering the interior or the upper end of the outer sleeve 600 is welded to the concrete component for fixation. By setting the outer sleeve 600, not only can the various components arranged therein be protected, but also the structural strength can be enhanced and the aesthetic appearance of the product can be improved.

[0053] Based on the above structure, preferably, the outer sleeve 600 and the positioning sleeve 400 are both integrally formed of metal material.

[0054] As a preferred embodiment, based on the above structure, the utility model further includes a protective cover 700, the open end of the protective cover 700 is provided with a radial folded edge 710 extending outward, and the opening of the protective cover 700 is set downward and fixedly connected to the upper end of the outer screw head 120.

[0055] In this embodiment, the external screw head 120 is fixed to the upper end of the connecting rod 110 and is fixed to the preform by conventional methods such as threaded connection or welding in the prior art of the field, and then the protective cover 700 is welded to the upper end of the external screw head 120, thereby further strengthening the connection firmness. Example 4

[0056] like Figure 11 As shown, based on any of the above embodiments, the seal 500 of the present invention further includes an arc-shaped magnet 530, and a plurality of arc-shaped magnets 530 are distributed in a ring-shaped interval to form a magnetic ring, which is fixedly mounted on the inner wall of the upper sealing ring 510; the locking unit 210 is formed of a magnetic material, and the locking member 200 is magnetically connected to the magnetic ring.

[0057] In this embodiment, not only can the upper sealing ring 510 be used to form a sealing barrier, but the arc-shaped magnet 530 can also be used to add another magnetic sealing barrier to form a double sealing effect, which can further improve the reliability and safety of the sealing. Specifically, by setting the arc-shaped magnet 530, it can be tightly adsorbed on the upper part of the locking member 200 through magnetic force, thereby increasing the contact pressure between the upper sealing ring 510 and the locking member 200, improving the installation firmness of the upper sealing ring 510, and effectively avoiding the conical screw head 130 of the connector 100 from being squeezed downward and inserted into the locking member 200, which drives the locking member 200 and the upper sealing ring 510 to move downward in the connecting part 300, causing the outer wall of the upper sealing ring 510 and the inner wall of the connecting part 300 to rub and shift, thereby reducing the loosening of the upper sealing ring 510 and the locking member 200 due to vibration or external force, and having good assembly stability. It also effectively ensures the sealing effect of the upper sealing ring 510 on the gap between the upper part of the locking member 200 and the connecting part 300, thereby extending the service life.

[0058] On the basis of the above structure, in order to improve the sealing effect of the upper gap, preferably, the outer diameter of the upper sealing ring 510 is slightly larger than the inner diameter of the connecting component 300 .

[0059] On the basis of the above structure, in order to prevent the arc-shaped magnet 530 and the locking member 200 from moving relative to each other, preferably, a positioning groove is formed on the upper outer wall of each locking unit 210 corresponding to the arc-shaped magnet 530. The structure of the positioning groove can be the same as that of the receiving groove 211.

[0060] In this embodiment, by providing the positioning groove, not only can the upper sealing ring 510 and the arc-shaped magnet 530 be more stably maintained on the upper part of the locking member 200 when subjected to external pressure or vibration, but also during assembly, the upper sealing ring 510 can be more easily positioned and installed on the upper part of multiple locking units 210, reducing the difficulty and time of installation.

[0061] The above are only preferred specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent changes, modifications, substitutions and variations made by technicians in this technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of existing technologies should be within the scope of protection determined by the claims.

Claims

1. A prestressed concrete connector, comprising a connector (100), a locking member (200), a connecting member (300) and a positioning tube (400), wherein the connector (100) comprises an outer screw head (120), a connecting rod (110) and a conical screw head (130) which are fixedly connected in sequence, the conical screw head (130) and the locking member (200) are conically connected, the locking member (200) comprises a locking ring (220) and a plurality of locking units (210), the locking units (210) being an arc-shaped block structure with a raised middle portion of the outer wall, the connecting member (300) being sleeved inside the positioning tube (400) and wrapped around the outer side of the locking member (200), and characterized in that: It also includes a sealing member (500), the sealing member (500) includes an upper sealing ring (510) and a lower sealing ring (520), the upper sealing ring (510) is tightly mounted on the upper outer side of the plurality of locking units (210), the locking ring (220) is tightly mounted on the middle outer side of the plurality of locking units (210), and the middle outer walls of the plurality of locking units (210) are each provided with a corresponding receiving groove (211) for embedding and installing the locking ring (220); the positioning cylinder (400) is sequentially arranged from top to bottom. A first positioning step (410) and a second positioning step (420) are provided. The connecting component (300) is a circular tubular structure with an upper opening smaller than a lower opening. The lower end surface of the connecting component (300) contacts the upper step surface of the first positioning step (410). The lower sealing ring (520) is supported on the upper step surface of the second positioning step (420). When the conical screw head (130) is conically connected with the locking member (200), the lower sealing ring (520) is sleeved on the lower outer side of the plurality of locking units (210).

2. The prestressed concrete connector according to claim 1, characterized in that: It also includes an outer sleeve (600), which is a circular tubular structure with an open upper end and a closed lower end. A supporting step (610) is provided inside the outer sleeve (600). The outer sleeve (600) is sleeved on the outside of the positioning sleeve (400), and the upper step surface of the supporting step (610) is in contact with the lower step surface of the first positioning step (410). When the conical screw head (130) is conically connected with the locking member (200), the upper end surface heights of the locking member (200) and the connecting member (300) are both less than or equal to the upper end surface height of the outer sleeve (600).

3. The prestressed concrete connector according to claim 1, characterized in that: It also includes a protective cover (700), the open end of the protective cover (700) is provided with a radial folded edge (710) extending outward, and the opening of the protective cover (700) is arranged downward and fixedly connected to the upper end of the outer screw head (120).

4. The prestressed concrete connector according to claim 1, characterized in that: The number of the locking units (210) is four, and the inner wall of the locking unit (210) and the conical screw head (130) are correspondingly provided with one-way teeth. The outer wall of the locking unit (210) is in an arc shape, and a circular tube portion (212) extends upward from the upper end of the locking unit (210). The upper sealing ring (510) is tightly fitted on the outside of the circular tube portion (212), and a conical socket (213) with a larger upper portion and a smaller lower portion is opened on the inner wall of the circular tube portion (212).

5. The prestressed concrete connector according to claim 1, characterized in that: A compression step (310) is radially protruded from the outer portion of the upper end of the connecting component (300), and the lower step surface of the compression step (310) contacts the upper end surface of the positioning cylinder (400).

6. The prestressed concrete connector according to claim 5, characterized in that: An upwardly extending edge extension portion (430) is provided at the upper end of the positioning cylinder (400) corresponding to the pressing step (310), and the upper end surface height of the edge extension portion (430) is greater than or equal to the upper step surface height of the pressing step (310).

7. The prestressed concrete connector according to claim 1, characterized in that: The inner diameter of the upper opening of the positioning cylinder (400), the inner diameter of the first positioning step (410), and the inner diameter of the second positioning step (420) decrease in sequence.

8. The prestressed concrete connector according to claim 1, characterized in that: A positioning space (440) is formed between the second positioning step (420) and the inner wall of the lower end of the positioning cylinder (400) for limiting the insertion depth of the conical screw head (130).

9. The prestressed concrete connector according to claim 1, characterized in that: The sealing member (500) further comprises an arc-shaped magnet (530), wherein a plurality of arc-shaped magnets (530) are distributed at an annular interval to form a magnetic ring, and the magnetic ring is fixedly mounted on the inner wall of the upper sealing ring (510) and is magnetically connected to the locking member (200).

10. The prestressed concrete connector according to claim 9, characterized in that: Positioning grooves corresponding to the arc-shaped magnets (530) are provided on the upper outer walls of the plurality of locking units (210).

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