Device for reinforcing concrete beam with fiber cloth and construction method thereof

Abstract

The present invention belongs to the technical field of civil engineering structure reinforcement and reconstruction construction, and specifically relates to a device for reinforcing concrete beams with fiber cloth and a construction method thereof. The device includes a roller frame with a pressure roller installed and an adjustment bracket. The two groups of adjustment brackets on both sides of the roller frame are equipped with support rods in the vertical direction. The top of the support rod is horizontally extended to the upper surface of the concrete beam with a longitudinal adjustment wheel or a limit pin, so that the fiber cloth is pressed against the lower surface of the concrete beam by the clamping cooperation of the longitudinal adjustment wheel or the limit pin and the pressure roller; the device also includes a longitudinal adjustment component that can make the support rod produce a vertical adjustment and positioning action relative to the adjustment bracket. The device has the advantages of simple and convenient operation, high reinforcement efficiency and good finished product quality, saves time and effort, and can effectively shorten the actual construction period. The present invention also provides a construction method using the above-mentioned device, so as to specifically realize the purpose of rapid on-site construction of fiber cloth.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering structure reinforcement and reconstruction construction, and specifically relates to a device for reinforcing a concrete beam with fiber cloth and a construction method thereof. Background Art

[0002] Due to structural aging, changes in use and other reasons, more and more concrete components need to be reinforced to improve their durability or ultimate bearing capacity. The most common method is fiber cloth reinforcement. Fiber cloth has a high strength-to-weight ratio, good fatigue resistance and excellent corrosion resistance. It has become one of the main reinforcement materials for concrete components. The fiber cloth reinforcement method requires the use of glue with high bonding strength to tightly stick the fiber cloth to the surface of the concrete component so that the fiber cloth and the concrete component can be tightly combined and work together to improve the bearing capacity and bending stiffness of the concrete component. Concrete beams are one of the representative structures of concrete components. When reinforcing concrete beams with fiber cloth, the fiber cloth is mainly applied with glue to the lower surface of the square beam, and several layers are pasted layer by layer. In the prior art, it is usually manually pasted layer by layer without tools, which is not only laborious and time-consuming, but also the accuracy of pasting is questionable, resulting in unsatisfactory reinforcement efficiency and reinforcement quality, which needs to be solved urgently. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a device for reinforcing concrete beams with fiber cloth, which has the advantages of simple and convenient operation, high reinforcement efficiency and good finished product quality, saves time and labor, and can effectively shorten the actual construction period. The present invention also provides a construction method using the above-mentioned device, so as to specifically realize the purpose of rapid on-site construction of fiber cloth.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A device for reinforcing concrete beams with fiber cloth, characterized in that it includes a roller frame equipped with a pressure roller, the axial length of the pressure roller is perpendicular to the beam length direction of the concrete beam, and the fiber cloth passes through the matching gap between the roller surface of the pressure roller and the lower surface of the concrete beam; the device also includes adjustment brackets extending vertically upward from both sides of the roller frame along both sides of the concrete beam, and two groups of adjustment brackets located on both sides of the roller frame are equipped with support rods for vertical guidance, and the top of the support rod is horizontally extended to the upper surface of the concrete beam with a longitudinal adjustment wheel or a limit pin, so that the fiber cloth is pressed against the lower surface of the concrete beam by the clamping cooperation of the longitudinal adjustment wheel or the limit pin and the pressure roller; the device also includes a longitudinal adjustment component that can make the support rod produce vertical adjustment and positioning action relative to the adjustment bracket.

[0006] Preferably, the support rod is inserted into the plumb guide hole preset on the top surface of the adjusting bracket; a limit platform is coaxially convexly provided on the support rod body, and a longitudinal compression spring is sleeved on the support rod, and abutment is formed between the top end of the longitudinal compression spring and the lower shoulder of the limit platform, and abutment is formed between the bottom end of the longitudinal compression spring and the upper hole end of the plumb guide hole; the longitudinal adjustment assembly also includes a longitudinal adjustment rod that penetrates the roller frame along the axial direction of the pressure roller and forms a rotational fit with the roller frame, and a through hole is radially penetrated on the longitudinal adjustment rod, one end of the pull rope is fixed to the bottom surface of the support rod, and the other end of the pull rope extends downward and passes through the through hole and is then fixed to the bottom end of the support rod, thereby forming a bowstring structure; the longitudinal adjustment rod realizes the positioning function after rotation through the locking part.

[0007] Preferably, the same rod ends of the two groups of longitudinal adjustment rods form a synchronous rotation fit through belt drive or chain drive; a mounting hole is horizontally provided on the roller frame for the longitudinal adjustment rod to pass through, and the locking portion includes a positioning plate coaxially arranged on the mounting hole, the plate mouth of the positioning plate faces outward and is concavely provided with positioning notches, and the positioning notches are evenly distributed in sequence along the circumference of the positioning plate; the longitudinal adjustment rod body is located on the inner and outer sides of the roller frame and an inner positioning pin and an outer positioning pin are respectively arranged, the inner positioning pin and the inner hole end of the mounting hole respectively abut against the two ends of a horizontal compression spring mounted on the longitudinal adjustment rod, and a snap fit is formed between the outer positioning pin and the positioning notch for limiting the rotational movement of the longitudinal adjustment rod.

[0008] Preferably, the axis of the longitudinal adjustment wheel is parallel to the width direction of the concrete beam, and the axle of the longitudinal adjustment wheel passes through the adjustment hole on the support rod body and is fastened by a fixing nut; there are more than two groups of adjustment holes and they are evenly distributed in sequence along the length direction of the support rod.

[0009] Preferably, the adjusting bracket has a cross-shaped appearance, and the vertical guide hole and the side protrusion for fixing the bottom end of the pull rope are arranged on the longitudinal arm of the adjusting bracket.

[0010] Preferably, the adjustment bracket is fixed to the roller frame by two groups of transverse adjustment screw rods; a transverse adjustment wheel for resting against the side of the concrete beam is arranged on the horizontal arm of the adjustment bracket, and the rotation axis of the transverse adjustment wheel is arranged vertically; each transverse adjustment screw rod is a double-headed screw rod that is rotatably engaged on the roller frame and passes through the roller frame, threaded sections are arranged at both ends of the transverse adjustment screw rod extending out of the roller frame, and the threaded sections at both ends rotate in opposite directions to each other, and the two ends of the transverse adjustment screw rod respectively form a threaded engagement with a group of threaded holes on the adjustment bracket.

[0011] Preferably, the pressing roller includes a front roller body and a rear roller body, and a fiber cloth roller, a tensioning roller and a rubber roller are arranged in the roller frame parallel to the axis of the pressing roller. A glue box for containing glue is arranged below the rubber roller, and the lower roller surface of the rubber roller is immersed below the glue liquid level in the glue box. The fiber cloth starts from the fiber cloth roller and is attached to the lower surface of the concrete beam through the tensioning roller, the rubber roller, the front roller body and the rear roller body respectively.

[0012] Preferably, pulleys are coaxially arranged at the coaxial ends of the fiber cloth roller and the rubber roller, thereby forming a belt drive fit.

[0013] Preferably, the roller frame includes a left side plate, a right side plate and a bottom plate connecting the left side plate and the right side plate, thereby forming a right-angle groove structure with the groove facing upward and the groove length parallel to the length direction of the concrete beam; a handle for easy grasping is arranged on the lower plate surface of the bottom plate.

[0014] Preferably, a construction method of a device for reinforcing concrete beams using the fiber cloth is characterized by:

[0015] 1) Before work, the clamping gap between the longitudinal adjustment wheel or the limit pin and the pressing roller is reduced through the longitudinal adjustment component, so that the pressing roller moves upward until it fits the lower surface of the reinforced concrete beam; the roller frame is manually dragged along the length direction of the concrete beam, and the fiber cloth is continuously pressed to the lower surface of the concrete beam by the pressing roller, achieving a single-layer attachment and prestressed consolidation effect;

[0016] 2) After one round of attachment is completed, operate the longitudinal adjustment component to increase the clamping gap between the longitudinal adjustment wheel or the limit pin and the pressure roller, so that the pressure roller at the roller frame is downwardly separated from the lower surface of the reinforced concrete beam, and the roller frame can be manually dragged to reset the roller frame to the head end of the concrete beam along the length direction of the concrete beam without affecting the original attached fiber cloth, and repeat step 1);

[0017] 3) By looping steps 1) and 2) in sequence, the purpose of attaching and prestressing the fiber cloth of a designated layer can be achieved.

[0018] The beneficial effects of the present invention are:

[0019] 1) Many defects such as poor patching quality and low efficiency caused by traditional manual reinforcement are abandoned. The present invention forms a surrounding reinforcement structure that semi-surrounds the concrete beam by using a roller frame, an adjustment bracket, a support rod and a longitudinal adjustment wheel or a limit pin, thereby having the following effects: On the one hand, by utilizing the vertical adjustment and positioning action of the support rod relative to the adjustment bracket, the pressing roller can press the fiber cloth tightly on the lower surface of the concrete beam from bottom to top, and realize the prestressed patching function, thereby ensuring the patching quality. On the other hand, the vertical adjustment and positioning action of the support rod relative to the adjustment bracket also means that after attaching a layer of fiber cloth, there is no need to remove the present invention. It is only necessary to increase the clamping gap between the pressure roller and the longitudinal adjustment wheel or the limit pin through the longitudinal adjustment component. At this time, under the action of gravity, the pressure roller will actively leave the lower surface of the concrete beam, and then directly drag the present invention back to the head end of the patch, thereby achieving the purpose of multi-layer continuous patching without affecting the attached fiber cloth. Not only can the patching efficiency be significantly guaranteed, but the reciprocating dragging action of the present invention relative to the concrete beam is also completely carried out by the lifting action of the longitudinal adjustment wheel or the limit pin. Therefore, the operation intensity is extremely low, which is extremely time-saving and labor-saving, and the effect is remarkable.

[0020] 2) For the longitudinal adjustment component, a gear rack structure, or a combination structure of a winch-like drum and traction rope, or even a threaded adjustment or positioning hole adjustment method can be used, as long as the vertical reciprocating motion of the support rod relative to the adjustment bracket can be achieved. The present invention preferably adopts a matching structure of a longitudinal compression spring and a longitudinal adjustment rod. On the one hand, the pull rope forms a bowstring structure at the longitudinal adjustment rod and tightens the support rod on the adjustment bracket. On the other hand, whenever the reciprocating distance of the support rod needs to be adjusted, it is only necessary to rotate the longitudinal adjustment rod, and the longitudinal adjustment rod will continuously wind the pull rope. The pull rope overcomes the elastic restoring force of the longitudinal compression spring and continuously pulls the support rod down to achieve the function of increasing the clamping gap between the pressure roller and the longitudinal adjustment wheel or the limit pin; otherwise, the clamping gap is reduced.

[0021] Through the above-mentioned preferred structure of the present invention, the entire longitudinal adjustment assembly is integrated into a small roller frame, which not only ensures the compactness of the overall structure, but also takes into account the normal operating angle of the operator who is already located under the concrete beam in a suspended state during operation. It is more flexible and convenient to use and has a higher degree of humanization.

[0022] 3) For the longitudinal adjustment rod, once it is rotated and the pull rope is wound to a specified circle, the longitudinal adjustment rod needs to be fixed by the locking part. Of course, in actual operation, additional locking screws or fastening bolts can be arranged, or even conventional locking mechanisms such as locking mechanisms can be used to achieve the locking effect. The present invention adopts a positioning plate with a positioning notch, in conjunction with an outer positioning pin, so as to achieve a more convenient locking purpose, which is more conducive to the use of operators located under the concrete beam. In order to ensure that the outer positioning pin has the function of resetting to the positioning notch, a horizontal compression spring is required to provide the axial displacement action and automatic resetting effect of the longitudinal adjustment rod.

[0023] 4) The longitudinal adjustment assembly with a pull rope forms an online refined clamping gap adjustment structure; and according to the different thicknesses of the concrete beam, the preliminary rough clamping gap adjustment purpose can be achieved through the cooperation between the adjustment hole and the longitudinal adjustment wheel. In addition, the present invention can also be matched with a transverse adjustment wheel, so that the two sides of the concrete beam are horizontally clamped by the mutual clamping of the transverse adjustment wheels, and the upper and lower surfaces of the concrete beam are vertically clamped by the mutual clamping of the pressure roller and the longitudinal adjustment roller, so as to achieve the purpose of semi-enclosed positioning and clamping, and finally ensure the stability and reliability of subsequent operations.

[0024] 5) The longitudinal adjustment component realizes the longitudinal adjustment purpose of the present invention relative to the concrete beam to adapt to the use of beams of different models. Correspondingly, the present invention also provides a transverse adjustment component, that is, through the thread adjustment of the transverse adjustment screw rod relative to the adjustment bracket, the transverse spacing adjustment function of the two sets of adjustment brackets relative to the roller frame is realized, which is extremely convenient to use.

[0025] 6) In actual operation, the fiber cloth can be delivered through an additional mechanism or manpower when the present invention is working; or, as described in the present invention, a fiber cloth roller, a tensioning roller and a rubber roller, etc. can be used. Once the present invention is manually dragged, the fiber cloth will be continuously coated with glue on the surface of the rubber roller and then pressed to the lower surface of the concrete beam by the pressure roller, thereby achieving a convenient cloth-sticking effect, and a series of continuous actions such as cloth supply, gluing, and cloth pressing and reinforcement can be realized very conveniently, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 and Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 3 It is a three-dimensional diagram of the working state of the present invention;

[0028] Figure 4 for Figure 3 a side view of the structure shown;

[0029] Figure 5 for Figure 3 a cross-sectional view of the structure shown;

[0030] Figure 6 The following is a diagram of the installation positions of a set of longitudinal adjustment rods and two sets of transverse adjustment screw rods;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the longitudinal adjustment rod.

[0032] The actual correspondence between the reference numerals and component names of the present invention is as follows:

[0033] a-fiber cloth b-concrete beam

[0034] 10-pressure roller 11-front roller body 12-rear roller body

[0035] 20-roller frame 21-left side plate 22-right side plate 23-bottom plate 24-handle

[0036] 30-adjusting bracket 31-side convex part

[0037] 40-support rod 41-limiting platform 42-adjustment hole

[0038] 50-Vertical adjustment wheel

[0039] 61- longitudinal compression spring 62- pull rope 63- longitudinal adjustment rod 63a- through hole

[0040] 63b-inner positioning pin 63c-outer positioning pin 64-positioning plate 64a-positioning notch

[0041] 65-Horizontal compression spring

[0042] 71- lateral adjustment screw 72- lateral adjustment wheel

[0043] 81-fiber cloth roller 82-tensioning roller 83-rubber roller 84-rubber box DETAILED DESCRIPTION

[0044] For ease of understanding, here we combine Figure 1-7 The specific structure and working mode of the present invention are further described as follows:

[0045] The specific structure of the present invention is as follows Figure 1-7 As shown, its main structure includes a roller frame 20, an adjustment bracket 30, a support rod 40, a longitudinal adjustment component and a transverse adjustment component, etc. A series of cloth-applying actuators such as a pressing roller 10 are arranged in the roller frame 20. Among them:

[0046] Take concrete square beam as an example: the appearance of roller frame 20 refers to Figure 6 As shown in FIG. 1 , the left side plate 21, the right side plate 22 and the bottom plate 23 are connected end to end to form a right angle groove structure with the groove opening facing upward. Figure 3The beam length direction of the parallel concrete beam b shown in the figure is convenient for the installation and operation of the pressing roller 10 and other cloth-attaching actuators. Figure 5 As shown, the simply supported beam-shaped rotating body in the roller frame 20 is equipped with a fiber cloth roller 81, a tension roller 82, a rubber roller 83, a front roller body 11 and a rear roller body 12; at the same time, two sets of double-headed screw rods 71 ​​for lateral adjustment and a set of longitudinal adjustment rods 63 are also provided. In order to ensure the continuous working ability of the rubber roller 83, as shown in FIG. Figure 5 A glue box 84 is also arranged in the middle, and the glue box 84 is located directly below the glue roller 83, so as to achieve the purpose of continuous glue coating on the fiber cloth a.

[0047] exist Figure 1-3 It can be seen that a set of adjustment brackets 30 and support rods 40 are arranged on both sides of the roller frame 20. The support rod 40 passes through the plumb guide hole so that the guide rail fits at the top of the longitudinal arm of the "cross"-shaped adjustment bracket 30. In actual operation, a non-rotating fit should be formed between the plumb guide hole and the support rod 40, such as the plumb guide hole is arranged as a square hole, so that the support rod 40 can only produce a plumb lifting and lowering action relative to the plumb guide hole. The resetability of the support rod 40 can be ensured by the limit platform 41 and the longitudinal compression spring 61 located on the support rod 40, refer to Figure 1-2 As shown. Of course, in addition to the longitudinal compression spring 61, the longitudinal adjustment assembly also includes a pull rope 62, one end of which is fixed to the bottom end of the support rod 40, and the other end of the pull rope 62 extends vertically downward and is fixed to the side protrusion 31 at the bottom end of the longitudinal arm of the "cross" shaped adjustment bracket 30, thereby forming a bowstring structure. In addition, a positioning plate 64 with a positioning notch 64a is arranged at the longitudinal adjustment rod 63, which cooperates with the outer positioning pin 63c to achieve the locking purpose. In order to ensure that the outer positioning pin 63c has the function of resetting to the position at the positioning notch 64a, it is necessary to pass as follows Figure 1-2 and Figure 7 The cooperation of the horizontal compression spring 65 and the inner positioning pin 63b shown in the figure provides the axial displacement action and automatic reset effect of the longitudinal adjustment rod 63. Thus, whenever the longitudinal adjustment rod 63 is twisted, the pull rope 62 passing through the through hole 63a of the longitudinal adjustment rod 63 will be wound, thereby pulling the support rod 40 to produce a downward action; the upward action of the support rod 40 is achieved by the automatic reset action of the longitudinal compression spring 61 after the pull rope 62 is loosened.

[0048] As for the lateral adjustment assembly, it includes two sets of lateral adjustment screw rods 71. The two sets of lateral adjustment screw rods 71 ​​are as follows: Figure 6The belt transmission or chain transmission shown is formed so that when one set of transverse adjustment screw rods 71 ​​is turned, the other set will also rotate relative to the roller frame 20. The threaded sections at both ends of the two sets of transverse adjustment screw rods 71 ​​are positive threads and negative threads respectively. A handle is fixed at one end of one set of transverse adjustment screw rods 71. By turning the transverse adjustment screw rod 71, the two sets of adjustment brackets 30 can move horizontally closer or farther relative to the roller frame 20 in the middle.

[0049] To facilitate understanding of the present invention, the specific construction process of the present invention is given as follows in conjunction with the accompanying drawings:

[0050] 1) Before construction, add a proper amount of glue to the glue box 84, wrap the fiber cloth a around the fiber cloth roller 81, and then pass through the tension roller 82 and the glue roller 83 respectively, and then put it on the roller surface of the front roller body 11 and the rear roller body 12 from top to bottom. After that, the present invention is hung on one end of the concrete beam b through the longitudinal adjustment wheel 50.

[0051] 2) Horizontal width adjustment: According to the thickness of the concrete beam b, the position of the longitudinal adjustment wheel 50 on the adjustment bracket 30 is appropriately adjusted, that is: rotate the handle on one set of horizontal adjustment screws, and drive the other set of horizontal adjustment screws 71 to rotate simultaneously through the belt, and the positive and negative threads at both ends of the horizontal adjustment screws respectively drive the left and right sets of adjustment brackets 30 to move closer together until the horizontal adjustment wheels 72 on the two sets of adjustment brackets 30 are attached to the side of the concrete beam b.

[0052] 3) Longitudinal up and down adjustment: Push the longitudinal adjustment rod 63 along the length direction of the longitudinal adjustment rod 63, and the longitudinal adjustment rod 63 overcomes the elastic force of the horizontal compression spring 65, so that the outer positioning pin 63c is separated from the positioning notch 64a of the positioning plate 64. Rotate the longitudinal adjustment rod 63, and while the longitudinal adjustment rod 63 rotates, the through hole 63a passing through the longitudinal adjustment rod 63 is also Figure 7 The pull rope 62 in the waist hole is wound around the longitudinal adjustment rod 63. Since one end of the pull rope 62 is fixed, the other end will pull the adjustment bracket 30 to move downward, and the longitudinal compression spring 61 will gradually tighten. At the same time, since the longitudinal adjustment wheel 50 presses on the upper side of the concrete beam b, it will drive the entire roller frame 20 to move upward until the two groups of rollers 10 press the fiber cloth a on the lower surface of the concrete beam b. Loosen the longitudinal adjustment rod 63, and the longitudinal adjustment rod 63 will reset under the elastic restoring force of the horizontal compression spring 65, driving the longitudinal adjustment rod 63 to move horizontally, so that the outer positioning pin 63c is re-stuck in the corresponding positioning notch 64a of the positioning plate 64, and the adjustment is completed.

[0053] 4) After all the above adjustment actions are completed, start the patching process:

[0054] Hold the handle 24 and pull the present invention from the head end to the tail end of the concrete beam b. During the movement, the fiber cloth a is continuously pulled out from the fiber cloth roller 81, and the fiber cloth roller 81 rotates continuously, driving the rubber roller 83 to rotate through the belt drive, and the rubber roller 83 takes out the glue in the glue box 84 and applies it on the fiber cloth a. The fiber cloth a passes through the tensioning roller 82, and then passes through the front roller body 11 after being coated with glue by the rubber roller 83, and then is pasted on the lower surface of the concrete beam b. The rear roller body 12 then presses the fiber cloth a tightly through secondary rolling. The fiber cloth a has a certain prestress during the pulling process. At the same time, this prestress can also be set by adjusting the rotation resistance of the fiber cloth roller 81, or even the clamping force between the longitudinal adjustment wheel 50 and the pressure roller 10. The existence of prestress has significant benefits for reinforcement construction.

[0055] When the present invention reaches the rear end of the concrete beam b, the fiber cloth a is cut off, and the pasting of one layer of cloth is completed. Then the longitudinal adjustment is performed to separate the pressing roller 10 from the lower surface of the concrete beam b, and the device is pulled back to the head end, and the above adjustment and pasting steps are repeated, so that more layers of pasting can be easily performed.

[0056] Of course, in actual operation, the concrete beam can also be a beam body of other shapes besides the square beam in the figure, as long as it can be used adaptively through the present invention. At the same time, for those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0058] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A device for reinforcing concrete beams with fiber cloth, characterized in that: The device comprises a roller frame (20) on which a pressing roller (10) is installed, wherein the axial length of the pressing roller (10) is perpendicular to the beam length direction of the concrete beam, and the fiber cloth passes through the matching gap between the roller surface of the pressing roller (10) and the lower surface of the concrete beam; the device also comprises adjustment brackets (30) extending vertically upward from both sides of the roller frame (20) along both sides of the concrete beam, and two groups of adjustment brackets (30) located on both sides of the roller frame (20) are both vertically guided and matched with support rods (40), and the top end of the support rod (40) is horizontally extended to the upper surface of the concrete beam with a longitudinal adjustment wheel (50) or a limit pin, so that the fiber cloth is pressed against the lower surface of the concrete beam by clamping the longitudinal adjustment wheel (50) or the limit pin with the pressing roller (10); the device also comprises a longitudinal adjustment component that can make the support rod (40) produce a vertical adjustment and positioning action relative to the adjustment bracket (30); The adjustment bracket (30) is fixed to the roller frame (20) via two groups of transverse adjustment screw rods (71); a transverse adjustment wheel (72) for abutting against the side of the concrete beam is arranged on the horizontal arm of the adjustment bracket (30), and the rotation axis of the transverse adjustment wheel (72) is arranged vertically; each transverse adjustment screw rod (71) is a double-headed screw rod that is rotatably matched on the roller frame (20) and penetrates the roller frame (20); threaded sections are arranged at both ends of the transverse adjustment screw rod (71) extending out of the roller frame (20), and the threaded sections at both ends rotate in opposite directions to each other, and the two ends of the transverse adjustment screw rod (71) are respectively threadedly matched with a group of threaded holes on the adjustment bracket (30); The pressure roller (10) comprises a front roller body (11) and a rear roller body (12); a fiber cloth roller (81), a tension roller (82) and a rubber roller (83) are arranged in parallel with the axis of the pressure roller (10) in the roller frame (20); a glue box (84) for containing glue is arranged below the rubber roller (83); the lower roller surface of the rubber roller (83) is immersed below the glue liquid level in the glue box (84); the fiber cloth starts from the fiber cloth roller (81) and passes through the tension roller (82), the rubber roller (83), the front roller body (11) and the rear roller body (12) to be attached to the lower surface of the concrete beam.

2. The device for reinforcing concrete beams with fiber cloth according to claim 1, characterized in that: The support rod (40) is inserted into a vertical guide hole preset on the top surface of the adjustment bracket (30); a limit platform (41) is coaxially convexly provided on the support rod (40); a longitudinal compression spring (61) is sleeved on the support rod (40); a top end of the longitudinal compression spring (61) and a lower shaft shoulder of the limit platform (41) are abutted against each other; a bottom end of the longitudinal compression spring (61) and an upper hole end of the vertical guide hole are abutted against each other; the longitudinal adjustment component also includes a longitudinally extending portion extending along the axis of the pressure roller (10) and extending along the axis of the pressure roller (10). The roller frame (20) is provided with a longitudinal adjustment rod (63) which is rotatably matched with the roller frame (20). A through hole (63a) is radially penetrated on the longitudinal adjustment rod (63). One end of a pull rope (62) is fixed to the bottom surface of the support rod (40). The other end of the pull rope (62) extends downward and passes through the through hole (63a) and is then fixed to the bottom end of the support rod (40), thereby forming a bowstring structure. The longitudinal adjustment rod (63) realizes a positioning function after rotation through a locking portion.

3. The device for reinforcing concrete beams with fiber cloth according to claim 2, characterized in that: The same rod ends of the two groups of longitudinal adjustment rods (63) are synchronously rotated by belt drive or chain drive; a mounting hole is horizontally provided on the roller frame (20) for the longitudinal adjustment rod (63) to pass through; the locking portion comprises a positioning plate (64) coaxially arranged on the mounting hole; the plate opening of the positioning plate (64) faces outward and is concavely provided with positioning notches (64a); the positioning notches (64a) are uniformly distributed in sequence along the circumference of the positioning plate (64); an inner positioning pin (63b) and an outer positioning pin (63c) are respectively arranged on the inner and outer sides of the longitudinal adjustment rod (63) body; the inner positioning pin (63b) and the inner hole end of the mounting hole are respectively abutted against the two ends of a horizontal compression spring (65) sleeved on the longitudinal adjustment rod (63); a snap fit is formed between the outer positioning pin (63c) and the positioning notch (64a) for limiting the rotation of the longitudinal adjustment rod (63).

4. The device for reinforcing concrete beams with fiber cloth according to claim 3, characterized in that: The axis of the longitudinal adjustment wheel (50) is parallel to the beam width direction of the concrete beam, and the wheel axle of the longitudinal adjustment wheel (50) passes through the adjustment hole (42) at the shaft of the support rod (40) and is fastened by a fixing nut; the adjustment holes (42) are in more than two groups and are evenly distributed in sequence along the length direction of the support rod (40).

5. The device for reinforcing concrete beams with fiber cloth according to claim 4, characterized in that: The adjusting bracket (30) has a "cross" shape, and the vertical guide hole and the side protrusion (31) for fixing the bottom end of the pull rope (62) are arranged on the longitudinal arm of the adjusting bracket (30).

6. The device for reinforcing concrete beams with fiber cloth according to claim 1, characterized in that: Belt pulleys are coaxially arranged at the same roller ends of the fiber cloth roller (81) and the rubber roller (83), thereby forming a belt drive fit.

7. The device for reinforcing concrete beams with fiber cloth according to claim 1, 2, 3, 4 or 5, characterized in that: The roller frame (20) comprises a left side plate (21), a right side plate (22), and a bottom plate (23) connecting the left side plate (21) and the right side plate (22), thereby forming a right-angle groove structure with the groove opening facing upward and the groove length direction parallel to the concrete beam length direction; a handle (24) is arranged on the lower plate surface of the bottom plate (23) for easy grasping.

8. A construction method for using the device for reinforcing concrete beams with the fiber cloth as claimed in claim 1, 2, 3, 4 or 5, characterized in that: 1) Before work, the clamping gap between the longitudinal adjustment wheel (50) or the limit pin and the pressing roller (10) is reduced by means of the longitudinal adjustment component, so that the pressing roller (10) moves upward until it is in contact with the lower surface of the reinforced concrete beam; the roller frame (20) is manually dragged along the length direction of the concrete beam, and the fiber cloth is continuously pressed onto the lower surface of the concrete beam by the pressing roller (10), thereby achieving a single-layer attachment and prestressed consolidation effect; 2) After one round of attachment is completed, the longitudinal adjustment component is operated to increase the clamping gap between the longitudinal adjustment wheel (50) or the limit pin and the pressure roller (10), so that the pressure roller (10) at the roller frame (20) is downwardly separated from the lower surface of the reinforced concrete beam, and the roller frame (20) is manually dragged to reset the roller frame (20) along the length direction of the concrete beam to the head end of the concrete beam without affecting the original attached fiber cloth, and step 1) is repeated; 3) By looping steps 1) and 2) in sequence, the purpose of attaching and prestressing the fiber cloth of a specified layer can be achieved.

Images