A glass fiber reinforced plastic bar connecting device

Abstract

The present invention relates to the technical field of building construction, and discloses a glass fiber bar connection device. The glass fiber bar connection device includes a first connection block and a second connection block. Both the first connection block and the second connection block include a connection block body, a locking member, and an adhesive. A first through hole and a second through hole communicating with each other are provided on the connection block body. A first internal thread is provided on the inner side wall of the first through hole. The adhesive is disposed in the second through hole for bonding the glass fiber bar and the inner side wall of the second through hole. The locking member is embedded in the connection block body and is disposed around the outer peripheral side of the glass fiber bar. The first internal thread of the first connection block is used to connect with a common steel bar and a glass fiber bar respectively, and the first internal thread of the second connection block is used to connect with a glass fiber bar. The present invention can realize the mutual connection of glass fiber bars of different specifications and models, and can also realize the mutual connection of glass fiber bars of different specifications and models with common steel bars of different specifications and models.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly to a glass fiber reinforced plastic bar connecting device. Background Art

[0002] As a composite material, glass fiber reinforced plastic bars have many advantages compared with ordinary steel bars. Their absolute anti-corrosion performance, adiabatic insulation, high tensile strength, easy cutting, light weight and other characteristics play an important role in major civil engineering projects. Glass fiber reinforced plastic bars are basically similar to steel bars in performance, have good adhesion to concrete, and at the same time have high tensile strength and low shear strength, and can be easily cut directly by a composite shield machine without causing abnormal tool damage.

[0003] However, the difference between glass fiber reinforced plastic bars and steel bars is that the glass fiber reinforced plastic bars have a small elastic modulus and are typical brittle materials. The stress-strain curve shows an obvious linear relationship before fracture, which greatly affects the stability of the glass fiber reinforced plastic bar cage during hoisting and the flexural and shear bearing capacities of the glass fiber reinforced plastic bar diaphragm wall during the foundation pit excavation stage. At the same time, glass fiber reinforced plastic bars cannot be welded, which also causes difficulties in connecting glass fiber reinforced plastic bars. Summary of the Invention

[0004] Based on the above problems, the purpose of the present invention is to provide a glass fiber reinforced plastic bar connecting device, which can realize the mutual connection of glass fiber reinforced plastic bars of different specifications and models, and can also realize the mutual connection between glass fiber reinforced plastic bars and ordinary steel bars.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A glass fiber reinforced plastic bar connecting device includes a first connecting block and a second connecting block. Both the first connecting block and the second connecting block include a connecting block body, a locking member and an adhesive. A first through hole and a second through hole that are communicated with each other are provided on the connecting block body. A first internal thread is provided on the inner side wall of the first through hole. The adhesive is arranged in the second through hole for bonding the glass fiber reinforced plastic bar and the inner side wall of the second through hole. The locking member is embedded in the connecting block body and is arranged around the outer peripheral side of the glass fiber reinforced plastic bar. The first internal thread of the first connecting block is used to connect with both the ordinary steel bar and the glass fiber reinforced plastic bar respectively. The first internal thread of the second connecting block is used to connect with the glass fiber reinforced plastic bar.

[0007] As an optional solution of the glass fiber reinforced plastic bar connecting device of the present invention, the locking member includes a first threaded section, an arc-shaped friction section and a second threaded section that are connected in sequence. A first nut is threadedly connected to the first threaded section, and a second nut is threadedly connected to the second threaded section. The arc-shaped friction section abuts against the outer peripheral side of the glass fiber reinforced plastic bar.

[0008] As an alternative to the glass fiber bar connecting device of the present invention, the first threaded section, the arc-shaped friction section and the second threaded section together form a U-shaped structure.

[0009] As an alternative to the glass fiber bar connecting device of the present invention, a plurality of friction protrusions are provided on the inner side of the arc-shaped friction section.

[0010] As an alternative to the glass fiber bar connecting device of the present invention, a glue injection hole for injecting the adhesive is provided on the connecting block body, and the glue injection hole communicates with the second through hole.

[0011] As an alternative to the glass fiber bar connecting device of the present invention, a second internal thread is provided on the inner side wall of the second through hole.

[0012] As an alternative to the glass fiber bar connecting device of the present invention, an extension portion is provided at an end of the connecting block body of the second connecting block away from the second through hole, and the extension portion of one second connecting block can be detachably connected to the connecting block body of another adjacent second connecting block.

[0013] As an alternative to the glass fiber bar connecting device of the present invention, an external extension thread is provided on the outer side wall of the extension portion, and a second internal thread is provided on the inner side wall of the second through hole. The external extension thread of one second connecting block can be threadedly connected to the second internal thread of another adjacent second connecting block.

[0014] As an alternative to the glass fiber bar connecting device of the present invention, a third through hole communicating with the first through hole is provided on the extension portion, and a third internal thread is provided on the inner side wall of the third through hole. The third internal thread is used for connecting with the glass fiber bar.

[0015] As an alternative to the glass fiber bar connecting device of the present invention, it further includes an adapter and a sleeve. The adapter includes a first connecting portion and a second connecting portion connected to each other. The first connecting portion is connected to the first internal thread, and the second connecting portion is threadedly connected to the sleeve. The sleeve is used for threaded connection with a common steel bar.

[0016] The beneficial effects of the present invention are:

[0017] The glass fiber bar connecting device provided by the present invention realizes the connection between the glass fiber bar and the ordinary steel bar through the connecting block body of the first connecting block, realizes the connection between the glass fiber bars and the protection of the glass fiber bars through the connecting block body of the second connecting block, locks the glass fiber bars through the locking piece, and bonds the glass fiber bars through the adhesive to strengthen the protection of the glass fiber bars. It can realize the mutual connection of glass fiber bars of different specifications and models, and can also realize the mutual connection of glass fiber bars of different specifications and models with ordinary steel bars of different specifications and models (both threaded steel bars and round steel bars are acceptable). The first connecting block and the second connecting block can be connected to each other, so as to eliminate the problem of small elastic modulus of the glass fiber bars in a local area, making it have an elastic modulus exceeding that of ordinary steel bars, so that the glass fiber bars can be widely used in application scenarios such as suspension points and stressed steel bar trusses. Since the connecting block body can be made of high-strength steel and has weldability, it solves the fatal disadvantage that glass fiber bars cannot be welded, and can make its application in engineering unrestricted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0019] Figure 1 FIG. 9 is a schematic structural diagram of the first connecting block in the glass fiber bar connecting device provided by the specific embodiment of the present invention when connecting the glass fiber bar and the ordinary steel bar;

[0020] Figure 2 FIG. 13 is a schematic cross-sectional view of the first connecting block in the glass fiber bar connecting device provided by the specific embodiment of the present invention when connecting the glass fiber bar and the ordinary steel bar;

[0021] Figure 3 FIG. 17 is a schematic structural diagram of the first connecting block in the glass fiber bar connecting device provided by the specific embodiment of the present invention;

[0022] Figure 4 FIG. 21 is a schematic cross-sectional view of the first connecting block in the glass fiber bar connecting device provided by the specific embodiment of the present invention;

[0023] Figure 5 FIG. 25 is a schematic cross-sectional view of the connecting block body, the locking piece and the glass fiber bar in the glass fiber bar connecting device provided by the specific embodiment of the present invention;

[0024] Figure 6 FIG. 29 is a schematic structural diagram of the locking piece in the glass fiber bar connecting device provided by the specific embodiment of the present invention;

[0025] Figure 7 It is a schematic structural view of the first connection block and the sleeve in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention when connecting the glass fiber reinforced plastic bar and the ordinary steel bar;

[0026] Figure 8 It is a schematic sectional view of the first connection block, the adapter and the sleeve in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention when connecting the glass fiber reinforced plastic bar and the ordinary steel bar;

[0027] Figure 9 It is a schematic structural view of the adapter in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention;

[0028] Figure 10 It is a schematic structural view of the sleeve in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention;

[0029] Figure 11 It is a schematic structural view of two first connection blocks in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention when connecting two glass fiber reinforced plastic bars with different diameters;

[0030] Figure 12 It is a schematic sectional view of two first connection blocks in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention when connecting two glass fiber reinforced plastic bars with different diameters;

[0031] Figure 13 It is a schematic structural view of the second connection block in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention when protecting the glass fiber reinforced plastic bar;

[0032] Figure 14 It is a schematic sectional view of the second connection block in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention when protecting the glass fiber reinforced plastic bar;

[0033] Figure 15 It is a schematic structural view of the second connection block in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention;

[0034] Figure 16 It is a schematic sectional view of the second connection block in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention;

[0035] Figure 17 It is a schematic structural view of the first connection block, the second connection block and the lifting ring in the glass fiber reinforced plastic bar connection device provided by the specific embodiment of the present invention.

[0036] In the figure:

[0037] 1 - First connecting block; 2 - Second connecting block; 3 - Connecting block body; 4 - Locking member; 5 - Adhesive; 6 - Extension

[0038] portion; 7 - Adapter; 8 - Sleeve;

[0039] 31 - First through - hole; 311 - First internal thread; 32 - Second through - hole; 321 - Second internal thread; 33 - Glue injection hole;

[0040] 41 - First thread segment; 42 - Arc friction segment; 421 - Friction protrusion; 43 - Second thread segment; 44 - First

[0041] nut; 45 - Second nut;

[0042] 61 - Extension external thread; 62 - Third through - hole; 621 - Third internal thread;

[0043] 71 - First connecting portion; 72 - Second connecting portion;

[0044] 100 - Glass fiber rib; 200 - Ordinary steel bar; 300 - Hoisting ring. Detailed implementation manners

[0045] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0047] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] As Figures 1 to 17 shown, this embodiment provides a glass fiber reinforced plastic bar connecting device. The glass fiber reinforced plastic bar connecting device includes a first connecting block 1 and a second connecting block 2. Both the first connecting block 1 and the second connecting block 2 include a connecting block body 3, a locking member 4, and an adhesive 5. A first through hole 31 and a second through hole 32 that are communicated with each other are provided on the connecting block body 3. A first internal thread 311 is provided on the inner side wall of the first through hole 31. The adhesive 5 is arranged in the second through hole 32 for bonding the glass fiber reinforced plastic bar 100 and the inner side wall of the second through hole 32. The locking member 4 is embedded in the connecting block body 3 and is disposed around the outer peripheral side of the glass fiber reinforced plastic bar 100. The first internal thread 311 of the first connecting block 1 is used to connect with the common reinforcing bar 200 and the glass fiber reinforced plastic bar 100 respectively; the first internal thread 311 of the second connecting block 2 is used to connect with the glass fiber reinforced plastic bar 100.

[0049] The connection between the glass fiber reinforced plastic bar 100 and the common reinforcing bar 200 is realized through the connecting block body 3 of the first connecting block 1. The connection between the glass fiber reinforced plastic bar 100 and the glass fiber reinforced plastic bar 100 and the protection of the glass fiber reinforced plastic bar 100 are realized through the connecting block body 3 of the second connecting block 2. The glass fiber reinforced plastic bar 100 is locked through the locking member 4, and the glass fiber reinforced plastic bar 100 is bonded through the adhesive 5 to strengthen the protection of the glass fiber reinforced plastic bar 100. The mutual connection of glass fiber reinforced plastic bars 100 of different specifications and models can be realized, and the mutual connection between glass fiber reinforced plastic bars 100 of different specifications and models and common reinforcing bars 200 of different specifications and models (both threaded reinforcing bars and round steel are acceptable) can also be realized. The first connecting block 1 and the second connecting block 2 can be connected to each other, so that the problem of the small elastic modulus of the glass fiber reinforced plastic bar 100 in a local area is eliminated, and it has an elastic modulus exceeding that of the common reinforcing bar 200, so that the glass fiber reinforced plastic bar 100 can be widely applied to application scenarios such as suspension points and stressed reinforcing bar trusses. Since the connecting block body 3 can be made of high-strength steel and has weldability, the fatal disadvantage that the glass fiber reinforced plastic bar 100 cannot be welded is solved, and its application in engineering is not restricted.

[0050] Optionally, the locking member 4 includes a first threaded section 41, an arc-shaped friction section 42, and a second threaded section 43 that are connected in sequence. A first nut 44 is threadedly connected to the first threaded section 41, and a second nut 45 is threadedly connected to the second threaded section 43. The arc-shaped friction section 42 abuts against the outer peripheral side of the glass fiber rib 100. The first threaded section 41, the arc-shaped friction section 42, and the second threaded section 43 are all located within the connection block body 3. The end portions of the first threaded section 41 and the second threaded section 43 respectively extend outside the connection block body 3. By screwing the first nut 44 and the second nut 45 at the end portions of the first threaded section 41 and the second threaded section 43, the first nut 44 and the second nut 45 respectively abut against the connection block body 3, strengthening the protection of the glass fiber rib 100.

[0051] One connection block body 3 can be provided with 6 locking members 4. The number of locking members 4 can be adjusted, but should not be less than 4, with one in each of the four directions of the square. At the same time, the number of locking members 4 is not recommended to exceed 8. Although increasing the number can increase the fastening force, the construction is troublesome, and 8 locking members 4 can already fully meet the construction requirements. Note that the entire locking member 4 should be provided inside the connection block body 3. After the first nut 44 and the second nut 45 lock the glass fiber rib 100, the end portions of the first threaded section 41 and the second threaded section 43 shall not extend beyond the connection block body 3.

[0052] Optionally, the first threaded section 41, the arc-shaped friction section 42, and the second threaded section 43 together form a U-shaped structure. The arc-shaped friction section 42 can be a semi-circular ring structure, and the first threaded section 41 and the second threaded section 43 can respectively be cylindrical structures. External threads are respectively machined on the outer peripheral sides of the first threaded section 41 and the second threaded section 43 for connecting with the first nut 44 and the second nut 45 respectively. To increase the friction force between the arc-shaped friction section 42 and the glass fiber rib 100, optionally, a plurality of friction protrusions 421 are provided on the inner side of the arc-shaped friction section 42.

[0053] Optionally, a glue injection hole 33 for injecting an adhesive 5 is provided on the connection block body 3. The glue injection hole 33 communicates with the second through hole 32. The glue injection hole 33 can be a circular channel. After the first nut 44 and the second nut 45 are locked, the adhesive 5 is injected between the inner side wall of the second through hole 32 and the glass fiber rib 100 through the glue injection hole 33, further connecting the connection block body 3 and the glass fiber rib 100, which is convenient for operation. A plurality of glue injection holes 33 can be provided along the outer peripheral side of the connection block body 3 to improve the glue injection efficiency and glue injection uniformity. To increase the adhesive force between the adhesive 5 and the inner side wall of the second through hole 32, optionally, a second internal thread 321 is provided on the inner side wall of the second through hole 32.

[0054] Optionally, an extension portion 6 is provided at an end of the connection block body 3 of the second connection block 2 away from the second through hole 32. The extension portion 6 of one second connection block 2 can be detachably connected to the connection block body 3 of an adjacent second connection block 2. With this arrangement, seamless connection between two adjacent second connection blocks 2 can be achieved, thereby providing all-round protection for the glass fiber bars 100.

[0055] To achieve stable connection between two adjacent second connection blocks 2, optionally, an external extension thread 61 is provided on the outer side wall of the extension portion 6, and a second internal thread 321 is provided on the inner side wall of the second through hole 32. The external extension thread 61 of one second connection block 2 can be threadedly connected to the second internal thread 321 of an adjacent second connection block 2.

[0056] To achieve connection between the extension portion 6 and the glass fiber bars 100, optionally, a third through hole 62 communicating with the first through hole 31 is provided on the extension portion 6, and a third internal thread 621 is provided on the inner side wall of the third through hole 62. The third internal thread 621 is used to connect with the glass fiber bars 100. Through threaded connection, stable connection between the extension portion 6 and the glass fiber bars 100 is achieved.

[0057] Optionally, the glass fiber bar connecting device further includes an adapter 7 and a sleeve 8. The adapter 7 includes a connected first connection portion 71 and a second connection portion 72. The first connection portion 71 is connected to the first internal thread 311, and the second connection portion 72 is threadedly connected to the sleeve 8. The sleeve 8 is used to be threadedly connected to the ordinary steel bar 200. Through the adapter 7 and the sleeve 8, mutual connection between glass fiber bars 100 of different specifications and models and ordinary steel bars 200 of different specifications and models (both threaded steel bars and round steel bars are acceptable) can be achieved. The first connection portion 71 of the adapter 7 is connected to the first internal thread 311 of one connection block body 3, and the second connection portion 72 of the adapter 7 is connected to the first internal thread 311 of an adjacent connection block body 3, thereby achieving mutual connection between glass fiber bars 100 of the same or different specifications and models. By welding one connection block body 3 and an adjacent connection block body 3 to each other, the purpose of being able to be used for parallel connection of glass fiber bars 100 of the same or different models is achieved.

[0058] When the first connecting block 1 is used alone, it can be used to connect the common steel bar 200 and the glass fiber bar 100 of the same model. The common steel bar 200 is threaded to obtain an external thread, and a torque wrench is used to make the common steel bar 200 enter the first connecting block 1 and be fastened through the internal and external thread connection. The threading of the glass fiber bar 100 cannot be obtained by on-site processing like the common steel bar 200 and needs to be given during the manufacturing process. It is also fastened through the internal and external thread connection. However, due to the small elastic modulus of the glass fiber bar 100 and it being a typical brittle material, although the threaded connection method can make the glass fiber bar 100 and the common steel bar 200 achieve the force-bearing effect, the force cannot be too large.

[0059] The extension part 6 of the second connecting block 2 can also be connected to the first connecting block 1. When applied to the hoisting scenario, a lifting ring 300 is arranged between the first connecting block 1 and the second connecting block 2, which improves the stability of the glass fiber bar 100 cage during hoisting. The second connecting block 2 is used to strengthen the glass fiber bar 100 and solve the problem of the small elastic modulus of the glass fiber bar 100, enabling the glass fiber bar 100 to be used in areas with very large forces. For example, in the hoisting point area of the steel bar cage, when used as a hoisting point, the force is very large, and relying solely on the glass fiber bar 100 cannot meet the force requirement. At this time, the first connecting block 1 and the second connecting block 2 can be connected to each other. The second connecting block 2 can theoretically be connected infinitely, and most of the force is borne by the connecting block body 3.

[0060] The glass fiber bar 100 is generally made of glass fiber and vinyl ester resin and does not have the property of direct welding. However, by attaching the connecting block body 3 outside the glass fiber bar 100, the steel bar can be welded to the connecting block body 3, and the connecting block body 3 is connected to the glass fiber bar 100, thus forming an integral force-bearing component. Currently, the glass fiber bar 100 is mostly used in the area where the shield machine passes through because the glass fiber bar 100 can be easily cut directly by the composite shield machine without causing abnormal tool damage. During construction, the glass fiber bar 100 and the common steel bar 200 are often used in combination for hoisting, and the common steel bar 200 is cut off during the hoisting process to prevent subsequent influence on the shield tunneling. However, this is time-consuming and laborious, and the cut-off common steel bar 200 can only be used as waste steel. If the glass fiber bar connecting device provided in this embodiment is used, there is no need to use the common steel bar 200 in cooperation. The force in the hoisting point area is basically borne by the connecting block body 3, and the connecting block body 3 has a small volume and does not need to be cut off and can be easily cut directly by the composite shield machine.

[0061] The glass fiber bar connecting device provided by this embodiment realizes the connection of the glass fiber bar 100 and the ordinary steel bar 200 through the connecting block body 3 of the first connecting block 1, realizes the connection of the glass fiber bar 100 and the glass fiber bar 100 and the protection of the glass fiber bar 100 through the connecting block body 3 of the second connecting block 2, locks the glass fiber bar 100 through the locking member 4, bonds the glass fiber bar 100 through the adhesive 5, strengthens the protection of the glass fiber bar 100, can realize the mutual connection of glass fiber bars 100 of different specifications and models, and can also realize the mutual connection of glass fiber bars 100 of different specifications and models and ordinary steel bars 200 of different specifications and models (both threaded steel bars and round steel bars are acceptable). The first connecting block 1 and the second connecting block 2 can be connected to each other, so that the problem of the small elastic modulus of the glass fiber bar 100 in a local area can be eliminated, and it can have an elastic modulus exceeding that of the ordinary steel bar 200, so that the glass fiber bar 100 can be widely applied to application scenarios such as suspension points and stressed steel bar trusses. Since the connecting block body 3 can be made of high-strength steel and has weldability, the fatal disadvantage that the glass fiber bar 100 cannot be welded is solved, and its application in engineering is not restricted.

[0062] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A glass fiber reinforced plastic bar connection device, characterized in that, It includes a first connection block (1) and a second connection block (2). Both the first connection block (1) and the second connection block (2) include a connection block body (3), a locking member (4), and an adhesive (5). A first through hole (31) and a second through hole (32) that communicate with each other are provided on the connection block body (3). A first internal thread (311) is provided on the inner side wall of the first through hole (31). The adhesive (5) is arranged in the second through hole (32) for bonding the glass fiber rib (100) and the inner side wall of the second through hole (32). The locking member (4) is embedded in the connection block body (3) and is arranged around the outer peripheral side of the glass fiber rib (100). The first internal thread (311) of the first connection block (1) is used to connect with a common steel bar (200) and the glass fiber rib (100) respectively. The first internal thread (311) of the second connection block (2) is used to connect with the glass fiber rib (100). The locking member (4) includes a first threaded section (41), an arc-shaped friction section (42), and a second threaded section (43) connected in sequence. A first nut (44) is threadedly connected to the first threaded section (41), and a second nut (45) is threadedly connected to the second threaded section (43). The arc-shaped friction section (42) abuts against the outer peripheral side of the glass fiber rib (100). The connection block body (3) is provided with a glue injection hole (33) for injecting the adhesive (5), and the glue injection hole (33) communicates with the second through hole (32).

2. The glass fiber bar connecting device according to claim 1, wherein The first threaded section (41), the arc-shaped friction section (42), and the second threaded section (43) together form a U-shaped structure.

3. The glass fiber bar connecting device according to claim 1, characterized in that, A plurality of friction protrusions (421) are provided on the inner side of the arc-shaped friction section (42).

4. The glass fiber bar connecting device according to claim 1, characterized in that, A second internal thread (321) is provided on the inner side wall of the second through hole (32).

5. The glass fiber bar connecting device according to claim 1, characterized in that, An extension part (6) is provided at the end of the connection block body (3) of the second connection block (2) away from the second through hole (32). The extension part (6) of one second connection block (2) can be detachably connected to the connection block body (3) of another adjacent second connection block (2).

6. The fiberglass rib connecting device according to claim 5, characterized in that, An extension external thread (61) is provided on the outer side wall of the extension part (6), and a second internal thread (321) is provided on the inner side wall of the second through hole (32). The extension external thread (61) of one second connection block (2) can be threadedly connected to the second internal thread (321) of another adjacent second connection block (2).

7. The glass fiber bar connecting device according to claim 5, characterized in that, A third through hole (62) that communicates with the first through hole (31) is provided on the extension part (6). A third internal thread (621) is provided on the inner side wall of the third through hole (62), and the third internal thread (621) is used to connect with the glass fiber rib (100).

8. The glass fiber reinforced plastic bar connecting device according to any one of claims 1-7, characterized in that It further includes an adapter (7) and a sleeve (8). The adapter (7) includes a first connecting portion (71) and a second connecting portion (72) connected to each other. The first connecting portion (71) is connected to the first internal thread (311), and the second connecting portion (72) is threadedly connected to the sleeve (8). The sleeve (8) is used for threadedly connecting with a common reinforcing bar (200).

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