Bridge rectangular pier body steel bar positioning fixture

Abstract

The invention relates to the technical field of bridge rectangular pier body pouring, and discloses a bridge rectangular pier body steel bar positioning clamp which comprises a mounting frame. The four mounting openings are formed in the mounting frame, and each mounting opening is of a long-strip-shaped structure; the latches are fixed in the four mounting ports respectively, and the latches located in the same row jointly form a zigzag structure; the sliding seats slide in the four mounting openings respectively, and a mounting groove is formed in the bottom surface of each sliding seat; the mounting cylinders are fixed to the top faces of the sliding seats correspondingly. By arranging the movable sliding seat, the construction flexibility and efficiency are greatly improved, and in the construction process of the rectangular pier body of the bridge, the positioning of reinforcing steel bars often needs to be accurately adjusted according to specific construction conditions and design requirements, so that the construction time and the labor cost are greatly saved.

Description

Technical Field

[0001] The invention relates to the technical field of pouring a rectangular bridge pier, in particular to a steel bar positioning fixture for a rectangular bridge pier. Background Art

[0002] The steel bar positioning fixture for the rectangular pier of a bridge, referred to as the steel bar positioning fixture, is a device specially designed for the precise positioning of steel bars during the construction of rectangular piers of bridges. It can effectively ensure the accurate position of the steel bars in the pier, thereby improving the overall stability and safety of the bridge structure.

[0003] After searching, the Chinese patent with announcement number CN214195240U discloses a steel bar positioning fixture, which belongs to the field of steel bar positioning technology, including a fixed frame, a plurality of connecting rods, a plurality of positioning rods, a plurality of positioning sleeves and a plurality of positioning pieces, wherein the plurality of connecting rods are parallel to each other and are all slidably arranged on the fixed frame; the plurality of connecting rods are used to be positioned on the fixed frame through corresponding locking pieces, the plurality of positioning rods correspond to the plurality of connecting rods one by one, the positioning rods are arranged on a side of the connecting rods away from the fixed frame, and are threadedly connected to the connecting rods, the plurality of positioning sleeves correspond to the positioning rods one by one, and the positioning sleeves are rotatably sleeved on the ends of the corresponding positioning rods, the outer wall of the positioning sleeves is provided with grooves for clamping steel bars, and the plurality of positioning pieces are used to position the positioning sleeves on the positioning rods, and the steel bar positioning fixture provided by the above technical scheme can realize the horizontal, longitudinal and inclined positioning of the steel bar because the positioning sleeves are rotatably sleeved on the positioning rods, thereby ensuring the accuracy of the steel bar positioning and accelerating the construction speed, but the above scheme still has the following shortcomings when actually used:

[0004] The steel bar positioning fixture proposed in the above technical solution is a fixed structure, and the position of the steel bar positioning port of the steel bar positioning fixture cannot be adjusted, which greatly limits its flexibility and applicability during the construction process. In actual construction, since the size, shape and arrangement of the rectangular pier of the bridge may vary from project to project, the placement of the steel bars needs to be precisely adjusted to meet the design requirements. However, the steel bar positioning fixture of the fixed structure cannot provide such an adjustment function, resulting in the inability of staff to flexibly adjust the position of the steel bars according to actual construction needs. This not only increases the difficulty and complexity of the construction, but may also affect the overall stability and safety of the bridge structure. In addition, since the position of the steel bar positioning port cannot be adjusted, once a design change or construction error occurs, the entire positioning fixture may need to be replaced, thereby increasing the construction cost and construction period.

[0005] Therefore, it is necessary to design a bridge rectangular pier steel bar positioning fixture to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a reinforcement positioning fixture for a rectangular pier of a bridge.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A steel bar positioning fixture for a rectangular bridge pier, comprising:

[0009] Mounting frame;

[0010] Four installation openings are all provided on the installation frame, and each of the installation openings is in a long strip structure;

[0011] A plurality of latch teeth are respectively fixed in the four mounting openings, and a plurality of latch teeth in the same row together form a sawtooth structure;

[0012] A plurality of sliding seats, respectively sliding in the four mounting openings, and a mounting groove is provided on the bottom surface of each sliding seat;

[0013] A plurality of mounting cylinders are respectively fixed on the top surfaces of the plurality of sliding seats;

[0014] A plurality of limit frames are respectively fixed on the sides of the plurality of sliding seats, and each of the limit frames is slidably sleeved on the installation frame;

[0015] A plurality of positioning structures are respectively arranged on the plurality of mounting tubes;

[0016] A plurality of locking structures are respectively arranged on the plurality of sliding seats;

[0017] A plurality of guide structures are respectively arranged on the plurality of sliding seats;

[0018] A plurality of control structures are respectively arranged on the plurality of sliding seats;

[0019] A plurality of pressing structures are respectively arranged on a plurality of the mounting tubes.

[0020] As a preferred technical solution of the present invention, the positioning structure includes:

[0021] Four first openings are all provided on the mounting tube;

[0022] Four sliding rods are slidably disposed in the four first openings respectively;

[0023] Four sleeve plates are respectively fixedly sleeved on one end of the four sliding rods located outside the mounting tube;

[0024] Four first springs, one end of each of the four first springs is connected to the mounting tube, and the other ends of the four first springs are connected to four sleeve plates respectively;

[0025] Four pressing plates are respectively fixed to one end of the four sliding rods located inside the mounting cylinder;

[0026] Four grooves are respectively arranged on the four pressing plates.

[0027] As a preferred technical solution of the present invention, the four clamping plates are distributed in a circumferential array around the axial position of the mounting cylinder.

[0028] As a preferred technical solution of the present invention, the locking structure includes:

[0029] Two second openings are both provided on the side of the sliding seat, and the two second openings are both connected to the mounting groove;

[0030] Two sliding plates, sliding in the two second openings respectively;

[0031] The two clamping blocks are respectively fixed on ends of the two sliding plates that are away from each other.

[0032] As a preferred technical solution of the present invention, the cross-sections of the clamping block and the clamping teeth are both triangular structures.

[0033] As a preferred technical solution of the present invention, the guide structure includes:

[0034] Two guide blocks are respectively fixed on the sides of the two sliding plates;

[0035] A guide rod is fixed inside the mounting groove, and the two guide blocks are slidably sleeved on the guide rod;

[0036] A second spring, wherein two ends of the second spring are respectively connected to two guide blocks.

[0037] As a preferred technical solution of the present invention, the control structure includes:

[0038] A rotating shaft is rotatably mounted in the mounting groove, and one end of the rotating shaft extends to the outside of the mounting groove;

[0039] A control plate, fixedly sleeved on the rotating shaft, the control plate is located between the two sliding plates, and the cross section of the control plate is an elliptical structure;

[0040] A torsion spring, fixedly sleeved on the rotating shaft;

[0041] A fixing rod, fixed on the groove wall of the installation groove, and the torsion spring abuts against the fixing rod;

[0042] A screw cap is fixed to one end of the rotating shaft located outside the mounting groove.

[0043] As a preferred technical solution of the present invention, the pressing structure includes:

[0044] A fixing ring, fixedly sleeved on the mounting tube;

[0045] a third spring, one end of which is connected to the fixing ring;

[0046] A lifting sleeve is slidably sleeved on the mounting tube, the lifting sleeve is connected to the other end of the third spring, and the top opening size of the lifting sleeve is larger than the bottom opening size.

[0047] As a preferred technical solution of the present invention, the bottom opening of the lifting sleeve and the outer surface of the mounting tube are in contact with each other.

[0048] As a preferred technical solution of the present invention, the side surface of the limiting frame and the side surface of the installation frame are in contact with each other.

[0049] The present invention has the following beneficial effects:

[0050] 1. By setting a movable sliding seat, the construction flexibility and efficiency are greatly improved. In the construction process of the rectangular pier of the bridge, the positioning of the steel bars often needs to be accurately adjusted according to the specific construction conditions and design requirements. The traditional fixed steel bar positioning fixture often cannot meet this flexibility requirement, while the positioning fixture proposed by the present invention can easily cope with it. By simply adjusting the position of the sliding seat, the steel bar positioning can be quickly adjusted, thereby greatly saving construction time and labor costs. Secondly, this design also improves the construction accuracy and engineering quality. The accurate positioning of the steel bars is an important guarantee for the stability and safety of the bridge structure. By adjusting the position of the sliding seat, the construction personnel can more accurately control the position and shape of the steel bars to ensure that the construction of the steel bar skeleton meets the design requirements;

[0051] 2. The positioning fixture realizes the fast, accurate and flexible adjustment of the steel bar positioning position through the innovative combination mechanism of the sliding seat and the installation tube. In the initial state, the coordinated use of the clamp block and the clamping teeth ensures the stability of the position of the sliding seat and the installation tube, and provides a firm positioning for the steel bar. When the position needs to be adjusted, the staff only needs to simply turn the rotary cap to quickly release the fixed relationship between the clamp block and the clamping teeth through a series of mechanical linkages, so that the sliding seat can slide freely in the installation port. In this process, the coordinated use of the torsion spring and the fixing rod not only realizes the automatic reset of the control panel, but also ensures that the adjusted sliding seat and the installation tube can be firmly fixed again;

[0052] 3. This steel bar positioning method realizes the effective positioning of steel bars of different sizes through the ingenious combination of lifting sleeves, sliding rods, clamping plates and springs. After the steel bars are inserted, the lifting sleeves are released, and the lifting sleeves are quickly reset under the action of the third spring, and the clamping plate is driven to move by squeezing the sliding rod to realize the clamping positioning of the steel bars. During this process, the clamping plate can automatically adjust its position according to the size of the steel bars to ensure the effective fixation of the steel bars. This positioning method is not only simple and fast to operate, but also has high adaptability and flexibility. It can be applied to the positioning needs of steel bars of different sizes. At the same time, through the elastic force of the spring, it is ensured that the clamping force of the clamping plate on the steel bars is always kept within a certain range, and the steel bars will not be loosened due to insufficient clamping force, nor will the steel bars be damaged due to excessive clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a schematic structural diagram of a reinforcement positioning fixture for a rectangular bridge pier proposed by the present invention;

[0054] Figure 2 It is a structural schematic diagram of the sliding seat and the mounting cylinder;

[0055] Figure 3 It is a structural schematic diagram of the sliding seat and the mounting tube from another perspective;

[0056] Figure 4 It is a schematic diagram of the cross-sectional structure of the sliding seat and the mounting cylinder;

[0057] Figure 5 It is a structural diagram of the control structure;

[0058] Figure 6 for Figure 1 A magnified view of the structure at A;

[0059] Figure 7 for Figure 3 A magnified view of the structure at B;

[0060] Figure 8 for Figure 5 Enlarged view of the structure at location C.

[0061] In the figure: 1. mounting frame; 2. mounting opening; 3. latching tooth; 4. sliding seat; 5. mounting cylinder; 6. limiting frame; 71. first opening; 72. sliding rod; 73. sleeve; 74. first spring; 75. clamping plate; 76. groove; 81. second opening; 82. sliding plate; 83. clamping block; 91. guide block; 92. guide rod; 93. second spring; 101. rotating shaft; 102. control board; 103. torsion spring; 104. fixing rod; 105. screw cap; 111. fixing ring; 112. third spring; 113. lifting sleeve. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0063] Reference Figure 1-8 A rectangular pier steel bar positioning fixture for a bridge comprises a mounting frame 1; four mounting openings 2, each of which is provided on the mounting frame 1, and each of which is in a long strip structure; a plurality of latch teeth 3, respectively fixed in the four mounting openings 2, and a plurality of latch teeth 3 in the same row together form a sawtooth structure; a plurality of sliding seats 4, respectively sliding in the four mounting openings 2, and a mounting groove is provided on the bottom surface of each sliding seat 4; a plurality of mounting cylinders 5, respectively fixed on the top surfaces of the plurality of sliding seats 4; a plurality of limiting frames 6, respectively fixed on the sides of the plurality of sliding seats 4, and each limiting frame 6 is slidably sleeved on the mounting frame 1, and the sides of the limiting frames 6 and the sides of the mounting frame 1 are in contact with each other. The staff can adjust the position of the sliding seat 4 in the installation opening 2 according to the construction needs. First of all, it greatly improves the construction flexibility and efficiency. In the construction process of the rectangular pier of the bridge, the positioning of the steel bars often needs to be precisely adjusted according to the specific construction conditions and design requirements. The traditional fixed steel bar positioning fixtures often cannot meet this flexibility requirement, while the positioning fixture proposed in the present invention can easily cope with it. By simply adjusting the position of the sliding seat 4, the steel bar positioning can be quickly adjusted, thereby greatly saving construction time and labor costs.

[0064] The rectangular pier reinforcement positioning fixture of the bridge also includes a number of positioning structures, which are respectively arranged on a number of mounting tubes 5, and the positioning structures include: four first openings 71, all of which are opened on the mounting tubes 5; four sliding rods 72, which are respectively slidably arranged in the four first openings 71; four sleeves 73, which are respectively fixedly sleeved on one end of the four sliding rods 72 located outside the mounting tube 5; four first springs 74, one end of the four first springs 74 are all connected to the mounting tube 5, and the other ends of the four first springs 74 are respectively connected to the four sleeves 73; four clamping plates 75, which are respectively fixed on one end of the four sliding rods 72 located inside the mounting tube 5, and the four clamping plates 75 are distributed in a circumferential array around the axial position of the mounting tube 5; four grooves 76 are respectively opened on the four clamping plates 75.

[0065] The rectangular pier reinforcement positioning fixture of the bridge also includes a plurality of locking structures, which are respectively arranged on a plurality of sliding seats 4. The locking structures include: two second openings 81, both of which are opened on the side of the sliding seat 4, and both of which are connected to the mounting groove; two sliding plates 82, which slide in the two second openings 81; two clamping blocks 83, which are respectively fixed at the ends of the two sliding plates 82 that are away from each other, and the cross-sections of the clamping blocks 83 and the clamping teeth 3 are both triangular structures. In the initial state, the two ends of the control plate 102 that are away from each other respectively abut the two sliding plates 82, at which time the two sliding plates 82 are in a state of being away from each other, and the two clamping blocks 83 are also in a state of being away from each other. At the same time, the torsion spring 103 is in a state of being free from force. When the two clamping blocks 83 are away from each other, the clamping block 83 can just be clamped between two adjacent clamping teeth 3. At this time, the clamping block 83 and the clamping teeth 3 play a role in fixing the position of the sliding seat 4, and the position of the installation tube 5 will also be fixed.

[0066] The rectangular pier reinforcement positioning fixture of the bridge also includes a plurality of guide structures, which are respectively arranged on a plurality of sliding seats 4, and the guide structures include: two guide blocks 91, which are respectively fixed on the sides of the two sliding plates 82; a guide rod 92, which is fixed inside the mounting groove, and the two guide blocks 91 are both slidably sleeved on the guide rod 92; and a second spring 93, the two ends of which are respectively connected to the two guide blocks 91. During the movement of the two sliding plates 82, the two guide blocks 91 and the guide rod 92 provide a limit to the movement of the two sliding plates 82, thereby ensuring the stability of the two sliding plates 82 during the movement.

[0067] The rectangular pier reinforcement positioning fixture of the bridge also includes a number of control structures, which are respectively arranged on a number of sliding seats 4, and the control structures include: a rotating shaft 101, which is rotatably installed in the installation groove, and one end of the rotating shaft 101 extends to the outside of the installation groove; a control plate 102, which is fixedly sleeved on the rotating shaft 101, and the control plate 102 is located between the two sliding plates 82, and the cross-section of the control plate 102 is an elliptical structure; a torsion spring 103, which is fixedly sleeved on the rotating shaft 101; a fixing rod 104, which is fixed on the groove wall of the installation groove, and the torsion spring 103 is against the fixing rod 104; a screw cap 105, which is fixed to one end of the rotating shaft 101 located outside the installation groove. When the rotating shaft 101 rotates, it can drive the control plate 102 to rotate. When the control plate 102 rotates, the two ends of the control plate 102 that are far away from each other will move away from the two sliding plates 82. At this time, the two ends of the control plate 102 that are far away from each other will no longer squeeze the two sliding plates 82. The two sliding plates 82 will approach each other under the elastic force of the second spring 93. When the two sliding plates 82 approach each other, the two clamping blocks 83 will also approach each other. When the two clamping blocks 83 approach each other, the clamping block 83 will move out from between two adjacent clamping teeth 3. At this time, the clamping block 83 is no longer in contact with the clamping teeth 3. Without the restriction of the clamping block 83 and the clamping teeth 3, the sliding seat 4 can slide freely in the installation port 2. In this case, the staff can directly pull the sliding block to adjust the position of the sliding block in the installation port 2.

[0068] The rectangular pier reinforcement positioning fixture of the bridge also includes a plurality of clamping structures, which are respectively arranged on a plurality of mounting tubes 5, and the clamping structures include: a fixing ring 111, which is fixedly sleeved on the mounting tube 5; a third spring 112, one end of which is connected to the fixing ring 111; a lifting sleeve 113, which is slidably sleeved on the mounting tube 5, and the lifting sleeve 113 is connected to the other end of the third spring 112, the top opening size of the lifting sleeve 113 is larger than the bottom opening size, and the bottom opening of the lifting sleeve 113 fits the outer surface of the mounting tube 5. In the initial state, the lifting sleeve 113 is located in an upper position under the elastic force of the third spring 112, and at this time, the lifting sleeve 113 will squeeze the four sliding rods 72, which makes the four clamping plates 75 close to each other.

[0069] When positioning the steel bars, the staff first pulls down the lifting sleeve 113 to move the lifting sleeve 113 downward. When the lifting sleeve 113 moves downward, it will separate from the four sliding rods 72. At this time, the lifting sleeve 113 no longer squeezes the four sliding rods 72. Without the squeezing of the lifting sleeve 113, the four sliding rods 72 will move away from each other under the elastic force of the four first springs 74, which makes the four clamping plates 75 move away from each other until the clamping plates 75 move to a position that fits the wall of the installation tube 5. Furthermore, the staff inserts the steel bar into the installation tube 5, and then releases the lifting sleeve 113. At this time, the lifting sleeve 113 will move up and reset under the elastic force of the third spring 112. When the lifting sleeve 113 moves upward, the lifting sleeve 113 will squeeze the four sliding rods 72. The four sliding rods 72 will move when squeezed, and drive the four clamping plates 75 to move until the four clamping plates 75 jointly press the steel bar. At this time, the four clamping plates 75 play a role of compressing and positioning the steel bar. This positioning method can provide effective positioning for steel bars of different sizes.

[0070] The specific working principle of the present invention is as follows:

[0071] When the rectangular pier steel bar positioning fixture of the bridge proposed in the present invention is in use, the staff can adjust the position of the sliding seat 4 in the installation port 2 according to the construction needs. First of all, it greatly improves the construction flexibility and efficiency. During the construction of the rectangular pier of the bridge, the positioning of the steel bars often needs to be precisely adjusted according to the specific construction conditions and design requirements. Traditional fixed steel bar positioning fixtures often cannot meet this flexibility requirement, while the positioning fixture proposed in the present invention can easily cope with it. By simply adjusting the position of the sliding seat 4, the steel bar positioning can be quickly adjusted, thereby greatly saving construction time and labor costs. Secondly, this design also improves construction accuracy and project quality. Accurate positioning of steel bars is an important guarantee for the stability and safety of bridge structures. By adjusting the position of the sliding seat 4, construction personnel can more accurately control the position and shape of the steel bars to ensure that the construction of the steel bar skeleton meets the design requirements.

[0072] Since several sliding seats 4 and several mounting tubes 5 are exactly the same, only the working principle of any one sliding seat 4 and the corresponding mounting tube 5 is described here. Specifically, in the initial state, the two ends of the control board 102 that are far away from each other respectively abut against the two sliding plates 82. At this time, the two sliding plates 82 are in a state of being far away from each other, and the two clamping blocks 83 are also in a state of being far away from each other. At the same time, the torsion spring 103 is in a state of being unstressed. When the two clamping blocks 83 are far away from each other, the clamping block 83 can just fit between two adjacent clamping teeth 3. At this time, the clamping block 83 and the clamping teeth 3 play a role in fixing the position of the sliding seat 4, and the position of the mounting tube 5 will also be fixed.

[0073] When the position of the sliding seat 4 needs to be adjusted, the staff first rotates the screw cap 105 so that the screw cap 105 drives the rotating shaft 101 to rotate. When the rotating shaft 101 rotates, it can drive the control plate 102 to rotate. When the control plate 102 rotates, the two ends of the control plate 102 that are far away from each other will move away from the two sliding plates 82. At this time, the two ends of the control plate 102 that are far away from each other no longer squeeze the two sliding plates 82. The two sliding plates 82 will approach each other under the elastic force of the second spring 93. When the two sliding plates 82 approach each other, the two clamping blocks 83 will also approach each other. When the two clamping blocks 83 approach each other, the clamping block 83 will move out from between the two adjacent clamping teeth 3. At this time, the clamping block 83 is no longer in contact with the clamping teeth 3. Without the restriction of the clamping block 83 and the clamping teeth 3, the sliding seat 4 can slide freely in the installation port 2. In this case, the staff can directly pull the sliding block to adjust the position of the sliding block in the installation port 2.

[0074] Furthermore, when the rotating shaft 101 rotates, the torsion spring 103 will rotate accordingly. In this process, the torsion spring 103 will press against the fixed rod 104, causing the torsion spring 103 to deform. After the adjustment is completed, the staff loosens the screw cap 105. At this time, the rotating shaft 101 will be reset under the cooperation of the torsion spring 103 and the fixed rod 104, so that the two ends of the control plate 102 that are far away from each other press against the two sliding plates 82 again. In this case, the two sliding plates 82 will move away from each other, and the two clamping blocks 83 will also move away from each other. The clamping block 83 will be clamped between two adjacent clamping teeth 3 again. At this time, the clamping block 83 and the clamping teeth 3 will again provide a limit for the sliding seat 4, and the position of the sliding seat 4 and the installation tube 5 will be fixed. In summary, the staff can quickly adjust the position of the sliding seat 4 by rotating the screw cap 105, thereby adjusting the positioning position of the installation tube 5 for the steel bar.

[0075] When the two sliding plates 82 are moving, the two guide blocks 91 and the guide rods 92 provide limits for the movement of the two sliding plates 82, thereby ensuring the stability of the two sliding plates 82 during movement. In addition, when the sliding seat 4 is moving, the limit frame 6 will slide on the mounting frame 1 and provide limits for the sliding seat 4, thereby ensuring the stability of the sliding seat 4 during movement.

[0076] After adjusting the position of the sliding seat 4, the staff uses the installation tube 5 to position the steel bar. Specifically, in the initial state, the lifting sleeve 113 is located at the upper position under the elastic force of the third spring 112. At this time, the lifting sleeve 113 will squeeze the four sliding rods 72, which makes the four clamping plates 75 close to each other. When positioning the steel bar, the staff first pulls down the lifting sleeve 113 to move the lifting sleeve 113 downward. When the lifting sleeve 113 moves downward, it will separate from the four sliding rods 72. At this time, the lifting sleeve 113 no longer squeezes the four sliding rods 72. Without the squeezing of the lifting sleeve 113, the four sliding rods 72 will move away from each other under the elastic force of the four first springs 74, which makes the four clamping plates 75 move away from each other until the clamping plates 75 move to a position that fits the wall of the installation tube 5.

[0077] Furthermore, the staff inserts the steel bar into the installation tube 5, and then releases the lifting sleeve 113. At this time, the lifting sleeve 113 will move up and reset under the elastic force of the third spring 112. When the lifting sleeve 113 moves upward, the lifting sleeve 113 will squeeze the four sliding rods 72. The four sliding rods 72 will move when squeezed, and drive the four clamping plates 75 to move until the four clamping plates 75 jointly press the steel bar. At this time, the four clamping plates 75 play a role of compressing and positioning the steel bar. This positioning method can provide effective positioning for steel bars of different sizes.

[0078] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rectangular pier steel bar positioning fixture for bridges, characterized in that: include: Mounting frame (1); Four installation openings (2) are all provided on the installation frame (1), and each installation opening (2) is in the form of a long strip; A plurality of latch teeth (3) are respectively fixed in the four installation openings (2), and the plurality of latch teeth (3) located in the same row together form a sawtooth structure; A plurality of sliding seats (4) are respectively slidable in the four mounting openings (2), and a mounting groove is provided on the bottom surface of each sliding seat (4); A plurality of mounting cylinders (5) are respectively fixed on the top surfaces of the plurality of sliding seats (4); A plurality of limit frames (6) are respectively fixed on the sides of the plurality of sliding seats (4), and each of the limit frames (6) is slidably sleeved on the installation frame (1); A plurality of positioning structures are respectively arranged on a plurality of the mounting cylinders (5); A plurality of locking structures are respectively arranged on a plurality of the sliding seats (4); A plurality of guide structures are respectively arranged on a plurality of the sliding seats (4); A plurality of control structures are respectively arranged on a plurality of the sliding seats (4); A plurality of pressing structures are respectively arranged on a plurality of the mounting cylinders (5).

2. The rectangular pier steel bar positioning fixture for bridges according to claim 1 is characterized in that: The positioning structure comprises: Four first openings (71) are all provided on the mounting tube (5); Four sliding rods (72) are slidably disposed in the four first openings (71) respectively; Four sleeve plates (73) are respectively fixedly sleeved on one end of the four sliding rods (72) located outside the mounting tube (5); Four first springs (74), one end of each of the four first springs (74) is connected to the mounting tube (5), and the other end of each of the four first springs (74) is connected to four sleeve plates (73) respectively; Four pressing plates (75) are respectively fixed to one end of the four sliding rods (72) located inside the mounting tube (5); Four grooves (76) are respectively formed on the four pressing plates (75).

3. The rectangular pier steel bar positioning fixture for bridges according to claim 2 is characterized in that: The four pressing plates (75) are distributed in a circumferential array around the axial position of the mounting cylinder (5).

4. The rectangular pier steel bar positioning fixture for bridges according to claim 1 is characterized in that: The locking structure comprises: Two second openings (81) are both opened on the side of the sliding seat (4), and the two second openings (81) are both connected to the installation groove; Two sliding plates (82) sliding in the two second openings (81) respectively; The two clamping blocks (83) are respectively fixed on ends of the two sliding plates (82) that are away from each other.

5. The rectangular pier steel bar positioning fixture for bridges according to claim 4 is characterized in that: The cross sections of the clamping block (83) and the clamping teeth (3) are both triangular structures.

6. The rectangular pier steel bar positioning fixture for bridges according to claim 4, characterized in that: The guiding structure comprises: Two guide blocks (91) are respectively fixed on the sides of the two sliding plates (82); A guide rod (92) is fixed inside the installation groove, and the two guide blocks (91) are both slidably sleeved on the guide rod (92); A second spring (93), two ends of the second spring (93) are respectively connected to the two guide blocks (91).

7. The rectangular pier steel bar positioning fixture for bridges according to claim 1, characterized in that: The control structure includes: A rotating shaft (101) is rotatably mounted in the mounting groove, and one end of the rotating shaft (101) extends to the outside of the mounting groove; A control plate (102) is fixedly sleeved on the rotating shaft (101), the control plate (102) is located between the two sliding plates (82), and the cross section of the control plate (102) is an elliptical structure; A torsion spring (103) fixedly sleeved on the rotating shaft (101); A fixing rod (104) is fixed on the groove wall of the installation groove, and the torsion spring (103) abuts against the fixing rod (104); The screw cap (105) is fixed to one end of the rotating shaft (101) located outside the mounting groove.

8. The rectangular bridge pier reinforcement positioning fixture according to claim 1 is characterized in that: The compression structure comprises: A fixing ring (111) fixedly sleeved on the mounting tube (5); a third spring (112), one end of the third spring (112) being connected to the fixing ring (111); A lifting sleeve (113) is slidably sleeved on the mounting tube (5), the lifting sleeve (113) is connected to the other end of the third spring (112), and the top opening size of the lifting sleeve (113) is larger than the bottom opening size.

9. The rectangular bridge pier reinforcement positioning fixture according to claim 8, characterized in that: The bottom opening of the lifting sleeve (113) and the outer surface of the mounting tube (5) fit each other.

10. The rectangular bridge pier reinforcement positioning fixture according to claim 1, characterized in that: The side surface of the limiting frame (6) and the side surface of the installation frame (1) are in contact with each other.

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