A multifunctional connection device for FRP bars and its use method

Abstract

This invention relates to a multifunctional connecting device and its method for use with FRP (fiberglass reinforced plastic) reinforcement. The multifunctional connecting device includes a closing ring and two symmetrically arranged connecting sleeves. Each connecting sleeve includes a sleeve with a connecting ring slidably disposed within it. The closing ring is slidably connected to the two sleeves and positioned between the two connecting rings. Both ends of the closing ring are sealed and abut against the two connecting rings respectively, preventing relative rotation between the connecting ring and the sleeve, and between the closing ring and the sleeve. The connecting ring can be threaded onto the FRP reinforcement. The connecting ring is used to fix the connecting sleeves, thus securing the two connecting sleeves to two FRP reinforcements respectively. A glue storage groove is formed on the inner wall of the closing ring, arranged circumferentially. The glue storage groove is used to store glue and connect the end faces of the two FRP reinforcements. A limiting pin is provided on the sleeve to restrict relative sliding between the sleeve and the closing ring. Using this device, the bonding effect of the two FRP reinforcements can be guaranteed, and the bonding condition can be observed by removing the limiting pin.

Description

Technical Field

[0001] This invention relates to the field of FRP rebar connection technology, and specifically to a multifunctional connection device and method for using FRP rebar. Background Technology

[0002] FRP (Fiberglass Reinforced Plastic) reinforcement bars are made by bonding multiple continuous fibers (such as glass fiber, carbon fiber, etc.) with a base material (such as polyamide resin, polyethylene resin, epoxy resin, etc.), and then extruding and drawing them through a special mold. Common fiber materials used in FRP reinforcement bars include glass fiber reinforced plastics (GFRP), carbon fiber reinforced plastics (CFRP), and aramid fiber reinforced plastics (AFRP). Due to their advantages such as light weight, high tensile strength, strong corrosion resistance, strong material bonding, and strong magnetic wave permeability, they have been widely used in structural reinforcement and engineering renovation both domestically and internationally in recent years.

[0003] Currently available FRP rib connection devices cannot provide a direct view of the joint position between two FRP ribs during use. When injecting high-strength curing adhesives such as high-strength resin, there may be issues with insufficient injection, affecting the connection strength. Therefore, a multifunctional FRP rib connection device is proposed that allows for direct observation of the connection status at the joint position, sufficient injection of high-strength curing adhesive, and facilitates more intuitive quality inspection of the FRP connection device. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a multifunctional connection device and method for FRP bars. Using this device, the bonding effect of two FRP bars can be guaranteed, and the bonding condition can be observed by removing the limiting pin.

[0005] To address the aforementioned technical problems, in a first aspect, the present invention provides a multifunctional connecting device for FRP (fiberglass reinforced plastic) ribs, comprising a closed ring and two symmetrically arranged connecting sleeves. Each connecting sleeve includes a sleeve, within which a connecting ring is slidably disposed. The closed ring is slidably connected to the two sleeves and is positioned between the two connecting rings. Both ends of the closed ring are respectively sealed and abut against the two connecting rings. Neither the connecting ring nor the sleeve can rotate relative to each other. The connecting ring can be threaded into the FRP rib. The connecting ring is used to fix the connecting sleeves, thereby fixing the two connecting sleeves onto two FRP ribs respectively. An adhesive storage groove is formed on the inner wall of the closed ring, arranged circumferentially. The adhesive storage groove is used to store adhesive and connect the end faces of the two FRP ribs. A limiting pin is provided on the sleeve, which restricts the relative sliding between the sleeve and the closed ring. When the limiting pin is removed, the two sleeves can move away from the closed ring, exposing the closed ring and allowing adhesive to be injected into the adhesive storage groove or the connection status of the two FRP ribs to be observed through the closed ring.

[0006] In some embodiments, the closed ring includes two semi-cylinders and a slide bar. The two semi-cylinders are rotatably connected to both sides of the slide bar, and the two semi-cylinders are detachably connected. The glue storage groove is formed on the inner wall of the semi-cylinders, and the sleeve is formed with a placement groove. The slide bar is slidably disposed in the placement groove and fits against the inner wall of the placement groove. The length of the slide bar is greater than the length of the semi-cylinders, so that even when the two semi-cylinders are exposed, the slide bar and the sleeve are still slidably connected.

[0007] Furthermore, each of the two semi-cylinders is provided with a connecting plate, and the connecting plate has two limiting holes, which respectively cooperate with the limiting pins on the two sleeves.

[0008] Furthermore, the inner wall of the sleeve has an axial groove, the connecting plate is slidably arranged in the groove, and a connecting hole is formed on the sleeve wall. The connecting hole is arranged corresponding to the limiting hole. The connecting hole passes through the groove and through the sleeve, so that the limiting pin can be inserted into the limiting hole through the connecting hole.

[0009] Furthermore, the inner wall of the sleeve is provided with a sliding groove along the axial direction, and one end of the sliding groove of the connecting sleeve near the adjacent connecting sleeve passes through the sleeve. A slider is fixedly provided on the outer wall of the connecting ring, and the slider is slidably disposed in the sliding groove, and the slider is in contact with the inner wall of the sliding groove.

[0010] Furthermore, the length of the slot is less than or equal to half the length of the semi-cylinder.

[0011] Furthermore, the length of the slide groove is less than the sum of the lengths of the connecting ring and the slot, so that when the limiting pin is inserted into the limiting hole, the end face of the closing ring and the connecting ring are sealed and abutted.

[0012] Furthermore, the two semi-cylinders are snapped together or connected by threads.

[0013] In some embodiments, a sealing strip is provided on the end face of the closing ring or connecting ring.

[0014] Secondly, the present invention provides a method of using a multifunctional connection device for FRP bars, comprising:

[0015] Insert two FRP bars from the ends of the two sleeves furthest from the closing ring, and thread them onto the connecting ring, ensuring that the connection point of the two FRP bars is within the glue storage groove of the closing ring.

[0016] Remove the limiting pin and slide the two sleeves away from the connection between the two FRP ribs, so that the closed ring is fully exposed;

[0017] Open the sealing ring, inject the adhesive into the storage tank, and then close the sealing ring.

[0018] Slide the two sleeves toward the joint of the two FRP bars, insert the limit pin, and wait for the colloid to connect the two FRP bars.

[0019] Remove the limiting pin and slide the two sleeves away from the connection point of the two FRP bars to open the closed ring and observe the connection of the two FRP bars.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The connecting ring of the present invention can be fixed on the FRP rib and position the closed ring so that the connecting surface of the two FRP ribs is within the length range of the glue storage tank of the closed ring. By injecting glue into the glue storage tank of the closed ring, the two FRP ribs are bonded together. During the bonding process, the connecting sleeve and the closed ring can be fixedly connected by the limiting pin, so that the two FRP ribs are relatively fixed, ensuring the bonding effect. The bonding situation can be observed by pulling out the limiting pin.

[0022] 2. The closed ring of the present invention includes two semi-cylinders and a slide bar. The two semi-cylinders are rotatably connected to the slide bar. By rotating the semi-cylinders, glue can be injected into the glue storage tank.

[0023] 3. The present invention achieves a fixed connection between the connecting sleeve and the closing ring by opening a slot and a connecting hole on the sleeve, and setting a connecting plate on each of the semi-cylinders, with a limiting hole on the connecting plate, so that the limiting pin can be inserted into the limiting hole through the connecting hole.

[0024] 4. The length of the slot in this invention is less than or equal to half the length of the semi-cylinder, and the length of the slide groove is less than the sum of the lengths of the connecting ring and the slot, so that when the limiting pin is inserted into the limiting hole, the end face of the closing ring and the connecting ring are sealed and abutted, ensuring the space formed by the closing ring and the connecting ring is sealed and preventing the colloid from flowing out. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the closed ring of the present invention after it has been exposed;

[0027] Figure 3 This is a schematic diagram of the structure of the present invention from another perspective after the closed ring is exposed;

[0028] Figure 4 This is a schematic diagram of the internal structure of the sleeve and the closed ring of the present invention when they are fixedly connected.

[0029] Reference numerals: connecting sleeve 1; sleeve 11; placement groove 111; slot 112; connecting hole 113; slide groove 114; limit pin 115; connecting ring 12; slider 121; closing ring 2; slide bar 21; semi-cylinder 22; connecting plate 221; limit hole 222; glue storage tank 223; bolt 224; FRP rib 3. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] like Figure 1 , 2 As shown, this invention provides a multifunctional connecting device for FRP (fiberglass reinforced plastic) reinforcement, including a closed ring 2 and two symmetrically arranged connecting sleeves 1. Each connecting sleeve 1 includes a sleeve 11, within which a connecting ring 12 is slidably disposed. The sleeves 11, closed ring 2, and connecting ring 12 all have circular cross-sections and are coaxially arranged. The closed ring 2 is slidably connected to the two sleeves 11. The inner diameter of the sleeve 11 is slightly larger than the outer diameters of the closed ring 2 and connecting ring 12. The closed ring 2 is positioned between the two connecting rings 12, with both ends sealingly abutting against the two connecting rings 12 respectively. Figure 1In the indicated state, neither the connecting ring 12 nor the sleeve 11, nor the closing ring 2 nor the sleeve 11, can rotate relative to each other. The inner wall of the connecting ring 12 is provided with an internal thread, and the connecting ring 12 can be threadedly engaged with the FRP rib 3. The connecting ring 12 is used to fix the connecting sleeve 1, so that the two connecting sleeves 1 are respectively fixed on the two FRP ribs 3. The inner wall of the closing ring 2 is provided with a glue storage groove 223, which is arranged circumferentially. The glue storage groove 223 is used to store glue and connect the end faces of the two FRP ribs 3. The sleeve 11 is provided with a limiting pin 115, which is used to limit the relative sliding between the sleeve 11 and the closing ring 2. When the limiting pin 115 is pulled out, the two sleeves 11 can move away from the closing ring 2 respectively, so that the closing ring 2 is exposed and glue can be injected into the glue storage groove 223 through the closing ring 2 or the connection of the two FRP ribs 3 can be observed.

[0032] Understandably, when the connecting rings 12 of the two connecting sleeves 1 are threadedly connected to the two FRP ribs 3 respectively, if the limiting pins 115 are used to connect the sleeves 11 to the closing rings 2, the entire structure and the two FRP ribs 3 can remain relatively fixed without the connecting rings 12 rotating, thus ensuring the fixing effect of the colloid on the two FRP ribs 3. In addition, by pulling out the limiting pins 115 and sliding out the two sleeves 11, the closing rings 2 can be exposed, at which point the colloid can be injected or the connection of the two FRP ribs 3 can be observed.

[0033] In some embodiments, such as Figure 2 , 3 As shown, the closed ring 2 includes two semi-cylinders 22 and a slider 21. The two semi-cylinders 22 are rotatably connected to the two sides of the slider 21 respectively. The two semi-cylinders 22 are detachably connected. The glue storage groove 223 is opened on the inner wall of the semi-cylinders 22. The sleeve 11 is opened with a placement groove 111. The slider 21 has a cuboid strip structure. The slider 21 is slidably arranged in the placement groove 111 and fits against the inner wall of the placement groove 111. The length of the slider 21 is greater than the length of the semi-cylinders 22, so that after the two semi-cylinders 22 are exposed, the slider 21 and the sleeve 11 are still slidably connected.

[0034] It should be noted that, Figure 2 The width of the glue storage tank 223 is only for illustration. The width of the glue storage tank 223 can be set to half the length of the closed ring 2 to ensure the bonding effect.

[0035] Furthermore, each of the two semi-cylinders 22 is provided with a connecting plate 221, and two limiting holes 222 are opened on the connecting plate 221. The two limiting holes 222 respectively cooperate with the limiting pins 115 on the two sleeves 11.

[0036] In some embodiments, the connecting plates 221 of the two semi-cylinders 22 described above can be snapped together or threaded together by bolts 224.

[0037] Furthermore, such as Figure 2 As shown, a groove 112 is formed on the inner wall of the sleeve 11 along the axial direction. The connecting plate 221 is slidably arranged in the groove 112. A connecting hole 113 is formed on the sleeve wall. The connecting hole 113 is arranged corresponding to the limiting hole 222. The connecting hole 113 passes through the groove 112 and through the sleeve 11, so that the limiting pin 115 can be inserted into the limiting hole 222 through the connecting hole 113.

[0038] Furthermore, such as Figure 4 As shown, a groove 114 is formed on the inner wall of the sleeve 11 along the axial direction. The end of the groove 114 of the connecting sleeve 1 near the adjacent connecting sleeve 1 passes through the sleeve 11. A slider 121 is fixedly provided on the outer wall of the connecting ring 12. The slider 121 is slidably disposed in the groove 114 and fits against the inner wall of the groove 114.

[0039] In some embodiments, the length of the slot 112 is less than or equal to half the length of the semi-cylinder 22, and the length of the slide groove 114 is less than the sum of the lengths of the connecting ring 12 and the slot 112, so that when the limiting pin 115 is inserted into the limiting hole 222, the closing ring 2 and the end face of the connecting ring 12 are sealed and abutted.

[0040] In some embodiments, in order to improve the sealing effect, a sealing strip is provided on the end face of the closing ring 2 or the connecting ring 12, and a sealing strip is provided between the two connecting plates 221.

[0041] The present invention also provides a method of using a multifunctional connection device for FRP reinforcement, comprising:

[0042] like Figure 4 As shown, an FRP rib 3 is inserted from the left end of the left connecting sleeve 1 and threadedly connected to the connecting ring 12 of the left connecting sleeve 1. Another FRP rib 3 is inserted from the right end of the right connecting sleeve 1 and threadedly connected to the connecting ring 12 of the right connecting sleeve 1, so that the two FRP ribs 3 abut against each other and the connection point of the two FRP ribs 3 is located within the glue storage groove 223 of the closed ring 2.

[0043] like Figure 2 As shown, pull out the limiting pin 115 and slide the two connecting sleeves 1 away from the connection of the two FRP ribs 3 respectively, that is, move the left sleeve 11 to the left until it is flush with the left connecting ring 12, and move the right sleeve 11 to the right until it is flush with the right connecting ring 12, so that the closed ring 2 is fully exposed.

[0044] like Figure 2 As shown, unscrew bolt 224, open the sealing ring 2, inject adhesive into the adhesive reservoir 223, and then close the sealing ring 2 again;

[0045] Slide the two sleeves 11 toward the connection point of the two FRP ribs 3 respectively, that is, slide the left sleeve 11 to the right and the right sleeve 11 to the left, so that the two ends of the closing ring 2 are sealed and abutted against the connecting ring 12. At this time, the limiting hole 222 on the connecting plate 221 of the closing ring 2 is exactly aligned with the connecting hole 113. Insert the limiting pin 115 into the connecting hole 113 to fix the sleeve 11 and wait for the colloid to connect the two FRP ribs 3.

[0046] Pull out the limiting pin 115 and slide the two connecting sleeves 1 away from the connection point of the two FRP bars 3 respectively, open the closing ring 2, and observe the connection of the two FRP bars 3.

[0047] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A multifunctional connecting device for FRP (fiberglass reinforced plastic) reinforcing bars, characterized in that: The assembly includes a closed ring (2) and two symmetrically arranged connecting sleeves (1). Each connecting sleeve (1) includes a sleeve (11). A connecting ring (12) is slidably disposed inside the sleeve (11). The closed ring (2) is slidably connected to the two sleeves (11). The closed ring (2) is arranged between the two connecting rings (12). The two ends of the closed ring (2) are respectively sealed and abutted against the two connecting rings (12). There is no relative rotation between the connecting rings (12) and the sleeves (11), nor between the closed ring (2) and the sleeves (11). The connecting ring (12) is threadedly engaged with the FRP reinforcement (3). The connecting ring (12) is used to fix the connecting sleeves (1), so that the two connecting sleeves (1) are respectively fixed. Fixed on two FRP ribs (3), the inner wall of the closed ring (2) is provided with a glue storage groove (223), the glue storage groove (223) is arranged in a circumferential direction, the glue storage groove (223) is used to store glue and connect the end faces of the two FRP ribs (3), the sleeve (11) is provided with a limiting pin (115), the limiting pin (115) is used to limit the relative sliding between the sleeve (11) and the closed ring (2), when the limiting pin (115) is pulled out, the two sleeves (11) can move away from the closed ring (2) respectively, so that the closed ring (2) is exposed and glue can be injected into the glue storage groove (223) or the connection of the two FRP ribs (3) can be observed through the closed ring (2); The closed ring (2) includes two semi-cylinders (22) and a slide bar (21). The two semi-cylinders (22) are rotatably connected to both sides of the slide bar (21). The two semi-cylinders (22) are detachably connected. The glue storage groove (223) is opened on the inner wall of the semi-cylinder (22). The sleeve (11) is opened with a placement groove (111). The slide bar (21) is slidably arranged in the placement groove (111) and fits against the inner wall of the placement groove (111). The length of the slide bar (21) is greater than the length of the semi-cylinder (22), so that after the two semi-cylinders (22) are exposed, the slide bar (21) and the sleeve (11) are still slidably connected. A connecting plate (221) is provided on each of the two semi-cylinders (22), and two limiting holes (222) are provided on the connecting plate (221). The two limiting holes (222) are respectively engaged with the limiting pins (115) on the two sleeves (11); The inner wall of the sleeve (11) has an axial groove (112) and the connecting plate (221) is slidably arranged in the groove (112). The sleeve (11) has a connecting hole (113) on its cylindrical wall. The connecting hole (113) is arranged corresponding to the limiting hole (222). The connecting hole (113) passes through the groove (112) and through the sleeve (11), so that the limiting pin (115) can be inserted into the limiting hole (222) through the connecting hole (113).

2. The multifunctional connecting device for FRP reinforcement according to claim 1, characterized in that: The inner wall of the sleeve (11) has a groove (114) along the axial direction. The end of the groove (114) of the connecting sleeve (1) near the adjacent connecting sleeve (1) passes through the sleeve (11). A slider (121) is fixedly provided on the outer wall of the connecting ring (12). The slider (121) is slidably disposed in the groove (114). The slider (121) is in contact with the inner wall of the groove (114).

3. The multifunctional connecting device for FRP reinforcement according to claim 2, characterized in that: The length of the slot (112) is less than or equal to half the length of the semi-cylinder (22).

4. The multifunctional connecting device for FRP reinforcement according to claim 3, characterized in that: The length of the groove (114) is less than the sum of the lengths of the connecting ring (12) and the slot (112), so that when the limiting pin (115) is inserted into the limiting hole (222), the end face of the closing ring (2) and the connecting ring (12) are sealed and abutted.

5. The multifunctional connecting device for FRP reinforcement according to claim 1, characterized in that: The two semi-cylinders (22) are snapped together or connected by threads.

6. The multifunctional connecting device for FRP reinforcement according to any one of claims 1 to 5, characterized in that: A sealing strip is provided on the end face of the closing ring (2) or the connecting ring (12).

7. A method of using a multifunctional connection device for FRP reinforcement according to any one of claims 1 to 6, characterized in that: include: Two FRP bars (3) are inserted from the ends of the two sleeves (11) away from the closed ring (2) and threadedly connected to the connecting ring (12), so that the connection of the two FRP bars (3) is located within the glue storage groove (223) of the closed ring (2); Pull out the limiting pin (115) and slide the two sleeves (11) away from the connection of the two FRP bars (3) respectively, so that the closed ring (2) is fully exposed; Open the sealing ring (2), inject the glue into the glue storage tank (223), and close the sealing ring (2); Slide the two sleeves (11) toward the connection point of the two FRP bars (3) respectively, insert the limiting pin (115), and wait for the colloid to connect the two FRP bars (3); Pull out the limiting pin (115) and slide the two sleeves (11) away from the connection of the two FRP bars (3) respectively to open the closed ring (2) and observe the connection of the two FRP bars (3).

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