CN220036110U - External corner member and formwork reinforcement system - Google Patents

Abstract

The utility model discloses a male corner member and a formwork reinforcing system, wherein the male corner member comprises a male corner main body; the external corner main body consists of two sections of rectangular channel steel which are mutually perpendicular, and the notch of each section of rectangular channel steel faces to the inner side; the two sections of rectangular channel steel are welded into a whole or connected together through an angle opposite-pull screw rod and a locking nut; t-shaped screws are arranged on each section of rectangular channel steel, the T-shaped screws penetrate through the rectangular channel steel, the T-shaped heads of the T-shaped screws are located on the notch sides of the channel steel, and locking nuts are screwed on the free ends of the screws of the T-shaped screws. The formwork reinforcement system comprises the aforementioned male corner members. The utility model has the beneficial effects that the external corner member enables the steel ladle molding party to be in an original structural state before and after constructing the parallel bar type transverse bars, thereby not only reducing the labor intensity of system construction and improving the low construction efficiency, but also maintaining the universality and being beneficial to fully utilizing the steel ladle molding party; the formwork reinforcing system has the characteristics of external corner members, and is high in assembling and disassembling efficiency.

Description

External corner member and formwork reinforcement system

Technical Field

The utility model relates to a building formwork reinforcing technology, in particular to an external corner member and a formwork reinforcing system.

Background

In the building construction process, reinforced concrete constructional columns or shear walls need to be reinforced by corresponding formwork reinforcing systems so as to prevent die explosion or slurry leakage in the pouring process. The formwork reinforcement system generally consists of a plurality of reinforcement frames distributed along the height direction so as to fasten the main back edges of the vertically arranged formworks and reinforce the formworks. In the reinforcing system of wall forms and column forms, mutually perpendicular adjacent bars at the external corners of the same reinforcing frame are fixedly connected by external corner members, which generally comprise external corner modules and corner counter-pull modules, the bars constituting the reinforcing frame also being generally referred to as secondary back edges. In the prior art, wood secondary back edges are phased out because wood is easy to decay and damage. Therefore, the prior secondary back ridge mainly comprises metal sections, including channel steel, metal pipes or steel plastic, steel clad wood and the like. When the existing secondary back rib section bar is constructed into a reinforced transverse bar, a horizontal bar structure with large section size is adopted, a screw rod is drilled on the section bar, and the section bar is pressed through a nut. The cross-section size is smaller and usually adopts the parallel bar structure, namely each reinforcing bar is formed by combining two sections, and the parallel bar is usually formed by welding two sections into two parallel combined structures with a certain interval through a connecting piece, namely, steel plastic and steel wood sections serving as channel steel, pipe materials or metal cladding materials of metal materials, so that a pull rod is arranged in a gap between the two sections in a penetrating way, and is tensioned and fixed through a pressing plate and a nut. Therefore, when the two sections are carried, the two sections are required to be carried simultaneously, the labor intensity is increased, and the erection efficiency is indirectly reduced. Meanwhile, the welded composite structural material section is not suitable for the main back ridge formed by a single section any more, otherwise, the material consumption of the system is increased. Such as chinese patent publication No. CN218176658U, discloses a ladle type secondary beam, which is convenient to form a reinforcing frame as a bar. The secondary beams are generally formed as square stock shaped sections with relatively small cross-sectional dimensions, and the cross bars are generally required to be arranged in a parallel bar configuration when forming a reinforcing frame as a cross bar. In order to ensure that the reinforcing system can be used as a horizontal bar type main back edge and also can be used for constructing a parallel bar type secondary back edge in the erection process of the reinforcing system, the reinforcing system is required to always maintain an original structural state. For this reason, improvements in the relevant connection members are required to make full use of the ladle molding.

Disclosure of Invention

The utility model provides a male corner member, which is formed by rectangular channel steel with notches of two sections of rectangular channel steel facing to the inner side to form a male corner main body part, and T-shaped screws and locking nuts penetrating through each section of rectangular channel steel, and is used for buckling two steel ladle plastic square end parts from the outer side at the male corner of a wall die or at the corner of the column die to form a connection structure convenient to disassemble. The steel ladle molding square is in an original structural state before and after the parallel bar type transverse bars are constructed, so that the labor intensity of system construction material transportation is reduced, the construction efficiency is correspondingly improved, the steel ladle molding square can be used for a main back edge and a secondary back edge, the universality is improved, and the steel ladle molding square is fully utilized. The second object of the utility model is to provide a formwork reinforcing system, wherein the sectional materials in the main back edge and the secondary back edge are kept in an original structural state, and the erection efficiency is high.

In order to achieve the first object, the present utility model adopts the following technical scheme.

A male corner member comprising a male corner body; the external corner main body consists of two sections of rectangular channel steel which are perpendicular to each other, and the notch of each section of rectangular channel steel faces to the inner side; two sections of rectangular channel steel are welded into a whole; or the two sections of rectangular channel steel are connected through angle opposite-pull screws and are connected together through lock nuts; every section all be equipped with T type screw rod on the rectangle channel-section, the screw rod portion of T type screw rod wears to establish through the perforation on the channel-section web on the rectangle channel-section, the T style of calligraphy head of T type screw rod is located the notch side of channel-section, and the screw rod free end of T type screw rod is gone up the spiro union and is had lock nut.

The external corner component adopting the scheme is formed by welding rectangular channel steel with the notch of each section of rectangular channel steel facing to the inner side to form an external corner main body, and the T-shaped screw penetrating through each section of rectangular channel steel and the locking nut screwed on the free end of the screw are formed and used for buckling the rectangular channel steel at the outer corners of the wall mold or the corners of the column mold from the outer sides at the ends of the two steel molding sides. The T-shaped heads of the T-shaped bolts are utilized to simultaneously compress two steel ladle plastic squares to form connection convenient to detach, so that the steel ladle plastic squares are in an original structural state before and after the parallel bar type transverse bars are constructed, the labor intensity of system construction material transportation is reduced, the erection efficiency is correspondingly improved, the steel ladle plastic squares are convenient to use, and can be used for main back edges and secondary back edges, the universality of the steel ladle plastic squares is maintained, and the steel ladle plastic squares are fully utilized. Wherein, two sections of rectangular channel steel are welded into a whole to form an angle square type connecting component; the two sections of rectangular channel steel are connected through the angle opposite-pulling screw rod to form an angle opposite-pulling component. When the angle square type connecting member is installed, the external angle member and the reinforcing bars on one side are firstly in approximately fixed connection, then the external angle member is inserted into the rectangular channel steel on the other side by moving the reinforcing bars on the other side, and finally the external angle member is fixedly connected with the two side cross bars which are perpendicular to each other. In the process of connecting the external corner component with a side bar, the following process can be operated, the channel steel base is sleeved on two steel ladle plastic parts which are overlapped up and down, the steel ladle plastic parts positioned above are lifted, the width direction of the T-shaped head part of the T-shaped bolt passes through a gap between the two steel ladle plastic parts, and finally the T-shaped head part is rotated for approximately 90 degrees, and the external corner component and the two steel ladle plastic parts are fixed together by screwing the nut. Or after two steel ladle plastic parts distributed up and down are separated into a certain gap, the two steel ladle plastic parts are sleeved from the end parts of the steel ladle plastic parts, so that the two ends of the T-shaped head part are respectively pressed on one steel ladle plastic part, and then the external corner component and the two steel ladle plastic parts are fixed together by screwing nuts. The use of the angle opposite-pulling member is basically the same as the operation content in the preamble, and after the two sections of rectangular channel steel are respectively and fixedly connected with the corresponding parallel bar type cross bars, the angle opposite-pulling screw rod and the locking nut are used for fixedly connecting the rectangular channel steel at the two ends together.

Preferably, in the scheme that the external corner main body is welded into a whole by two sections of rectangular channel steel, the two sections of rectangular channel steel are composed of a first channel steel and a second channel steel, one end of the first channel steel is abutted against a wing plate of the second channel steel, and the two sections of rectangular channel steel are welded together through the mutually abutted wing plates, so that the second channel steel keeps a through groove structure; the slot of the second channel steel also has an extension part extending towards the first channel steel, and the extension part is formed by a notch on the web of the abutting end of the first channel steel. The two through groove structures can ensure that adjacent bars form mutual abutting, and the connection firmness of the processing bars can be enhanced; the notch can be used for the corresponding steel ladle plastic square end to penetrate out, so that the part length of the corresponding rectangular channel steel can be reserved, additional cutting processing is not needed, the excess material removing processing work is reduced, and the erection efficiency is improved.

Preferably, the right-angle quadrilateral positioning plate is welded at the inner angle of the external corner main body, two adjacent edges of one corner of the right-angle quadrilateral positioning plate are welded with the wing plates of the corresponding rectangular channel steel, and the avoidance of the notch is formed in the notch direction of the rectangular channel steel. Two free edges formed after the welding of the right-angle quadrilateral positioning plate can be used for the abutting of two adjacent vertical main back edges at the corner or the external corner, so that the main back edges are conveniently arranged, the corresponding templates are not suspended by the main back edges, and the templates are further reinforced.

Further preferably, the rectangular quadrilateral positioning plates are welded on two side wings of the rectangular channel steel at the inner angle. The main back edge is reinforced by the two positioning plates, and the abutting reliability of the main back edge is improved.

Preferably, in the structure that the external corner main body is connected together by two sections of rectangular channel steel through the corner opposite-pulling screw rods, each section of rectangular channel steel is used for forming a corner opposite-pulling seat; the angle opposite-pulling seat comprises a mounting seat and a pulling-pressing bearing seat, wherein the mounting seat is formed by rectangular channel steel, the mounting seat and the pulling-pressing bearing seat are integrally formed or welded into a whole, the pulling-pressing bearing seat is formed by one end of the mounting seat, the pulling-pressing bearing seat is formed by equilateral right-angle steel, the distal ends of the two sides of the equilateral right-angle steel are arranged at the back of the bottom of the mounting seat, at least one side of the equilateral right-angle steel is provided with a penetrating hole for penetrating the same angle opposite-pulling screw rod, and the channel steel web plate of the mounting seat is provided with a penetrating hole. The base utilization angle is to drawing seat and ladle mould side and can dismantle connection's connection convenience and reliability, improves the fastness that consolidates the frame and connects and installs and removes the convenience of operation, promotes corresponding system and takes apart efficiency, reduces and takes apart the cost. Meanwhile, through the characteristic of strong bearing capacity of the pulling and pressing bearing seat of the equilateral angle steel, the connection reliability and the firmness are improved.

Further preferably, the perforation and the part of the penetrating hole on the rectangular channel steel web are combined into a strip-shaped hole. So as to facilitate the proper adjustment of the fixed position and further promote the convenience of assembly and disassembly.

Preferably, the perforations are bar-shaped holes. So as to facilitate the proper adjustment of the fixed position and further promote the convenience of assembly and disassembly.

Preferably, a plurality of fixed connection holes are formed in wing plates on two sides of the rectangular channel steel, the fixed connection holes are distributed in a row, and the axes of all the fixed connection holes are located in the same plane parallel to the back surface of a channel steel web plate of the rectangular channel steel. The fixed connecting hole is further connected with the steel plastic coating to enhance the connecting effect of the fixed connecting hole and the steel plastic coating. Wherein, the connecting hole corresponds to the hole on the side surface of the steel ladle plastic, and can be fixedly connected by nails or self-tapping screws.

Preferably, a backing plate is arranged on the back of the locking nut. The backing plate is positioned on the back of the locking nut, the contact surface between the nut and the bearing member is enlarged by the backing plate, the local pressure on the bearing member is lightened by enlarging the stressed area, the load pressure is improved, the service life is prolonged, and the bearing capacity of the corresponding bearing member is improved.

In order to achieve the second object, the present utility model adopts the following technical scheme.

A formwork reinforcement system comprises a reinforcement frame constructed based on parallel bar type reinforcement bars; the parallel bar type reinforcing bar consists of two steel ladle plastic squares which are arranged in parallel; two perpendicular parallel bar type reinforcing bars at least one external corner of the reinforcing frame are connected together through an external corner component for achieving the first purpose; two sections of rectangular channel steel in the external corner component compress two steel ladle plastic squares on the corresponding rectangular channel steel through the T-shaped heads of the T-shaped screw rod, and the two steel ladle plastic squares are positioned in the grooves of the channel steel.

With the column mold reinforcing system of the above scheme, the steel ladle molding forming the reinforcing bar is composed of the steel ladle type secondary beam disclosed in chinese patent publication No. CN218176658U, wherein the external corner member is composed of the external corner member for achieving the first object. The external corner members are utilized to enable the steel ladle molding square to be in an original structural state before and after the parallel bar type transverse bars are constructed, so that the labor intensity of system construction material handling is reduced, the construction efficiency is correspondingly improved, the steel ladle molding square can be conveniently used for the main back edges and the secondary back edges, and the universality of the steel ladle molding square is maintained.

The utility model has the beneficial effects that the external corner member is provided with the fixed connection structure matched with the steel ladle plastic square, so that the steel ladle plastic square is in an original structural state before and after constructing the parallel bar type transverse bars, the labor intensity of system construction material transportation is reduced, the erection efficiency is correspondingly improved, and the steel ladle plastic square section is always kept with single characteristic, thereby being used for the main back edge and the secondary back edge, keeping the universality and being beneficial to fully utilizing the steel ladle plastic square; the formwork reinforcing system has the characteristics of external corner members, and is high in assembling and disassembling efficiency.

Drawings

Fig. 1 is a schematic structural perspective view of an external corner member of embodiment 1 of the present utility model.

Fig. 2 is a front view of the male corner member of embodiment 1 of the present utility model.

Fig. 3 is a schematic structural perspective view of the male corner member of embodiment 2 of the present utility model.

Fig. 4 is a front view of the male corner member of embodiment 2 of the present utility model.

Fig. 5 is a schematic isometric view of a post mold reinforcement system employing the male corner members of the utility model.

Fig. 6 is a schematic perspective view of a portion of a wall form reinforcing system employing an inventive male corner member.

Detailed Description

The utility model will be further described with reference to the accompanying drawings, which are not intended to limit the scope of the utility model to the embodiments.

Example 1, referring to fig. 1 and 2, an external corner member comprises an external corner main body; the external corner main body consists of two sections of rectangular channel steel which are perpendicular to each other, and the notch of each section of rectangular channel steel faces to the inner side; two sections of rectangular channel steel are welded into a whole; and are connected together through a lock nut 3; every section all be equipped with T type screw rod 1 on the rectangle channel-section steel, the screw rod portion of T type screw rod 1 wears to establish through perforation 2 on the channel-section steel web on the rectangle channel-section steel, T style of calligraphy head 1a of T type screw rod 1 is located the notch side of channel-section steel, and the screw rod free end of T type screw rod 1 is gone up the spiro union and is had lock nut 3.

The two sections of rectangular channel steel are composed of a first channel steel 5 and a second channel steel 6, one end of the first channel steel 5 is abutted against a wing plate of the second channel steel 6, and the two sections of rectangular channel steel are welded together through the mutually abutted wing plates, so that the second channel steel 6 keeps a through groove structure; the slot of the second channel 6 also has an extension towards the first channel 5, which extension is constituted by a notch 5a in the web of the abutment end of the first channel 5. The perforations 2 are bar-shaped holes. And a base plate 8 is further arranged on the T-shaped screw 1, and the base plate 8 is positioned between the lock nut 3 and the rectangular channel steel.

A plurality of fixed connection holes 4 are formed in wing plates on two sides of the rectangular channel steel, the fixed connection holes 4 are distributed in a row, and the axes of all the fixed connection holes 4 are located in the same plane parallel to the back face of a channel steel web plate of the rectangular channel steel. Specifically, the fixed connection holes 4 are respectively arranged on wing plates at two sides of the first channel steel 5 and the second channel steel 6.

In addition, the right-angle quadrilateral positioning plate 7 is welded at the inner angle of the external corner main body, two adjacent edges of one corner of the right-angle quadrilateral positioning plate 7 are welded with the wing plates of the corresponding rectangular channel steel, and the avoidance of the notch is formed in the notch direction of the rectangular channel steel. Right-angle quadrilateral positioning plates 7 are welded on two lateral wings of the rectangular channel steel at the inner angle. Specifically, two adjacent right-angle edges of the right-angle quadrilateral positioning plate 7 are welded on wing plates corresponding to the first channel steel 5 and the second channel steel 6 respectively, and the two positioning plates are welded on the wing plates on two sides respectively.

In this embodiment, the rectangular quadrangle of the rectangular quadrangle positioning plate 7 may be square.

In example 2, see fig. 3 and 4, in combination with fig. 1 and 2, two rectangular sections of channel steel are connected by means of angle-pair pull screws 9 and are connected together by means of lock nuts 3.

Wherein the angle opposite-pulling screw 9 is in a double-head screw structure; each section of rectangular channel steel is used for forming an angle pair pulling seat; the angle opposite-pulling seat comprises a mounting seat 18 and a pulling-pressing bearing seat 19, wherein the mounting seat 18 is formed by rectangular channel steel, the mounting seat 18 and the pulling-pressing bearing seat 19 are welded into a whole, the pulling-pressing bearing seat 19 is positioned at one end of the mounting seat 18, the pulling-pressing bearing seat 19 is formed by equilateral right angle steel, the distal ends of the two sides of the equilateral right angle steel are lapped at the back of the bottom of the mounting seat 18, at least one side of the equilateral right angle steel, and a channel steel web of the mounting seat 18 is provided with a penetrating hole 20 for penetrating the same angle opposite-pulling screw 9. The perforation 2 and the part of the perforation 20 on the rectangular channel steel web are combined into a strip-shaped hole.

In this embodiment, the portion of the through hole 20 located on the equilateral right angle steel of the pulling and pressing bearing seat 19 is also in a strip shape, so that when the two opposite pulling seats are both fixed first, the opposite pulling screw 9 and the locking nut 3 form opposite pulling, the opposite pulling screw 9 of the double-end screw structure is convenient to pass through.

In order to avoid distinguishing the directions of the equilateral right angle steel forming the pulling and pressing bearing seat 19 and improve the convenience of welding and combining the pulling and pressing bearing seat 19, two long strip holes are arranged on two sides of the angle steel so as to form a part of the penetrating hole 20 on the angle steel by utilizing any strip hole.

In this embodiment, the mounting seat 18 and the pulling and pressing bearing seat 19 in the angle pair pulling seat can also be integrally formed by casting or forging. The pulling and pressing bearing seat 19 can be made into a triangular prism structure with an equilateral right angle during forging or casting.

The rest of the structure of this embodiment is the same as that of embodiment 1, and will not be described here again.

Example 3, see fig. 5, in combination with fig. 1 and 2, a column form formwork reinforcement system comprising a reinforcement frame constructed based on parallel bar type reinforcement bars 11; the parallel bar type reinforcing bars 11 consist of two steel ladle plastic squares which are arranged in parallel; two perpendicular parallel bar type reinforcing bars 11 at least one external corner of the reinforcing frame are connected together through the external corner member 10 of embodiment 1; two sections of rectangular channel steel in the external corner component compress two steel plastic square bars on the corresponding rectangular channel steel through the T-shaped head of the T-shaped screw 1, and the two steel plastic square bars are positioned in the groove of the channel steel.

The external corner member 10 is also fixedly connected with the corresponding steel ladle plastic through nails or self-tapping screws by the fixed connecting holes 4 on the two side wings of the corresponding rectangular channel steel.

The main back ridge 13 vertically arranged on the template 12 is formed by a ladle molding square with the same specification as the two ladle molding for constructing the two parallel bar type reinforcing bars 11; the two steel molding sides of the two adjacent main back ribs positioned at the external corners of the two adjacent side templates 12 respectively lean against the two free edges of the positioning plate 7 in the external corner member 10.

FIG. 5 shows a reinforcing system having three rectangular quadrangular reinforcing frames, two adjacent parallel bars 11 of a pair of diagonal corners among four corners of the reinforcing frame at the lowermost end being fixedly connected by the external corner member 10 of example 1; another pair of diagonally adjacent two parallel bars type reinforcing bars 11 are fixedly connected by the external corner member 22 of embodiment 2.

Adjacent two parallel bar type reinforcing bars 11 located at four corners of the middle reinforcing frame are fixedly connected by the external corner member 10 of embodiment 1.

The reinforcing frame at the upper end is formed based on parallel bar type reinforcing bars 11 and stud bolts, among four parallel bar type reinforcing bars 11 of the reinforcing frame, two adjacent parallel bar type reinforcing bars 11 are staggered up and down, two opposite parallel bar type reinforcing bars 11 are arranged at equal height, two opposite channel steel type pressing plates 14 are used, stud bolts 15 are fixedly connected with the tightening nuts 16, and a backing plate 17 is further arranged between the tightening nuts 16 and the channel steel type pressing plates 14.

The rest of the structure of this embodiment is the same as that of embodiment 1 and embodiment 2, and will not be described here again.

Example 4, see fig. 6, in combination with fig. 1, 2, 3 and 4, a wall form reinforcement system comprising a reinforcement frame constructed based on parallel bar type reinforcement bars 11; the parallel bar type reinforcing bars 11 consist of two steel ladle plastic squares which are arranged in parallel; two perpendicular parallel bars 11 at least one external corner of the reinforcing frame are connected together through the external corner member 10 of the embodiment 1 or the external corner member 22 of the embodiment 2; two sections of rectangular channel steel in the external corner component compress two steel ladle plastic squares on the corresponding rectangular channel steel through the T-shaped head of the T-shaped screw 1, and the two steel ladle plastic squares are positioned in the groove of the channel steel.

Fig. 6 shows a wall form reinforcing system with four reinforcing frames, two adjacent parallel bars type reinforcing bars 11 at the outer corners of two reinforcing frames at the lowermost and uppermost are fixedly connected by the outer corner members 22 of example 2. Two adjacent parallel bar type reinforcing bars 11 in the two middle reinforcing frames are fixedly connected through the external corner member 10 of the embodiment 1.

The reentrant corners of four reinforcement frames are connected through reentrant corner members 21, and the reentrant corner main body of reentrant corner member 21 is formed by two rectangle channel steel welding, and the notch of two rectangle channel steel outwards.

The rest of the structure of this embodiment is the same as that of embodiment 1 and embodiment 2, and will not be described here again.

In the present examples 3 and 4, the ladle molding side was constituted by a ladle type secondary beam disclosed in chinese patent publication No. CN 218176658U.

When the steel ladle plastic mold is specifically built, the notch of the steel ladle plastic part in the steel ladle plastic mold faces the template, namely the exposed surface of the strip plastic in the plastic inner core faces the template, and the steel ladle plastic part is positioned at the inner side of the steel ladle plastic part, so that the damage probability of the inner core is reduced.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. A male corner member comprising a male corner body; the external corner main body is characterized by comprising two sections of rectangular channel steel which are perpendicular to each other, and the notch of each section of rectangular channel steel faces to the inner side; two sections of rectangular channel steel are welded into a whole; or the two sections of rectangular channel steel are connected through the angle opposite-pull screw rods (9) and are connected together through the locking nuts (3); every section all be equipped with T type screw rod (1) on the rectangle channel-section steel, the screw rod portion of T type screw rod (1) is worn to establish through perforation (2) on the channel-section steel web on the rectangle channel-section steel, T style of calligraphy head (1 a) of T type screw rod (1) are located the notch side of channel-section steel, and the screw rod free end of T type screw rod (1) is gone up the spiro union and is had lock nut (3).

2. The external corner member according to claim 1, wherein in a structure in which the external corner body is welded as a whole by two sections of rectangular channel steel, the two sections of rectangular channel steel are composed of a first channel steel (5) and a second channel steel (6), one end of the first channel steel (5) is abutted against a wing plate of the second channel steel (6), and both are welded together by the mutually abutted wing plates, and the second channel steel (6) is kept in a through-slot structure; the notch of the second channel steel (6) is further provided with an extension part extending towards the first channel steel (5), and the extension part is formed by a notch (5 a) on the web plate of the abutting end of the first channel steel (5).

3. The external corner member according to claim 1, wherein in the structure that the external corner main body is welded into a whole by two sections of rectangular channel steel, a right-angle quadrilateral positioning plate (7) is welded at the inner angle of the external corner main body, and the right-angle quadrilateral positioning plate (7) is welded with the wing plate of the corresponding rectangular channel steel by two adjacent edges of one corner, and forms avoidance of the notch in the notch direction of the rectangular channel steel.

4. -external corner member according to claim 3, characterised in that the rectangular channel steel at the internal corners is welded with the right-angled quadrangular locating plates (7) on both flanks.

5. The external corner member according to claim 1, wherein in a structure in which the external corner body is connected together by two sections of rectangular channel steel by means of angle butt-pulling screws (9), each section of rectangular channel steel is used to form an angle butt-pulling seat; the angle opposite-pulling seat comprises a mounting seat (18) and a pulling-pressing bearing seat (19), wherein the mounting seat (18) is formed by rectangular channel steel, the mounting seat (18) and the pulling-pressing bearing seat (19) are integrally formed or welded into a whole, the pulling-pressing bearing seat (19) is positioned at one end of the mounting seat (18), the pulling-pressing bearing seat (19) is formed by equilateral right angle steel, the far ends of the two sides of the equilateral right angle steel are arranged at the back of the bottom of the mounting seat (18), at least one side of the equilateral right angle steel is arranged, and penetrating holes (20) for penetrating the same angle opposite-pulling screw (9) are formed in channel steel webs of the mounting seat (18).

6. -external corner member according to claim 5, characterised in that the perforations (2) merge into strip-shaped holes with the portions of the through-going holes (20) located on the rectangular channel web.

7. -external corner member according to any of the claims 1 to 4, characterized in that the perforations (2) are bar-shaped holes.

8. The external corner member according to any one of claims 1 to 6, wherein a plurality of fixed connection holes (4) are formed in wing plates on two sides of the rectangular channel steel, the fixed connection holes (4) are distributed in a row, and axes of all the fixed connection holes (4) are located in the same plane parallel to the back surface of a channel steel web of the rectangular channel steel.

9. -external corner member according to any of the claims 1 to 6, characterised in that the back of the lock nut (3) is provided with a backing plate (8).

10. A formwork reinforcement system comprises a reinforcement frame constructed based on parallel bar type reinforcement bars (11); the parallel bar type reinforcing bar (11) is characterized by comprising two steel ladle plastic squares which are arranged in parallel; two perpendicular parallel bars (11) at least one external corner of the reinforcing frame are connected together through the external corner member according to any one of claims 1 to 9; two sections of rectangular channel steel in the external corner component compress two steel ladle plastic squares on the corresponding rectangular channel steel through the T-shaped head of the T-shaped screw rod (1), and the two steel ladle plastic squares are positioned in the groove of the channel steel.