Pier body steel formwork with peripheral pull rod

Abstract

The application discloses a pier body steel formwork with a peripheral pull rod, belongs to the technical field of pier body steel formwork, and comprises a formwork main body and a hoop fixedly installed on the periphery of the formwork main body, opposite ends of the hoop are fixedly installed with pull ears, the inner wall of each pull ear is movably connected with a pressure receiving part, the inner wall of the pressure receiving part is connected with springs on opposite sides, a jack rod is fixedly installed on one side of the inner wall of the pressure receiving part, the other end of the jack rod extends through the pressure receiving part to the outside of the pressure receiving part, support blocks are fixedly installed on opposite sides of the inner wall of the pressure receiving part, push rods are rotatably connected to opposite sides of each support block, and fixed discs are rotatably connected to the ends of the two push rods away from the support blocks. The pressure receiving part is arranged to be closely combined with the inside of the pull ear to absorb part of vibration, thereby avoiding nut loosening, the friction between the pressure receiving part and the inside of the pull ear is enhanced, the stability of the pull rod is ensured, and the effect that the pull rod is stable in use and the nut is fastened is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pier body steel formwork, and particularly to pier body steel formwork with external pull rod. BACKGROUND

[0002] The pier body steel formwork with external pull rod is a formwork system specially designed for bridge pier body concrete construction.

[0003] The existing pier body steel formwork adopts a traditional external pull rod system of opposite pull bolts, which is used to realize the fixing and lateral pressure resistance of the formwork. However, when pouring the bridge pier body concrete, the concrete needs to be vibrated to discharge the internal air and avoid the occurrence of honeycomb, so as to ensure the qualification of pouring. However, the vibration will be transmitted to the pull rod, causing the loosening of the bolts and the occurrence of the gap of the pier body steel formwork, resulting in the leakage of the concrete.

[0004] At the same time, the force received by the steel formwork during the concrete pouring process will increase, and the force received by the pull rod will also increase, resulting in the deformation or even fracture of part of the pull rod. In addition, the non-standard disassembly of workers during disassembly will also cause damage to the pull rod, and thus the fracture or deformation of the pull rod will occur during the next use.

[0005] Therefore, we provide the pier body steel formwork with external pull rod. SUMMARY

[0006] The purpose of the present application is to solve the above-mentioned technical problems, and to provide the pier body steel formwork with external pull rod, which has the effects of stable use, increased service life of the pull rod, and nut fastening.

[0007] Therefore, the present application provides the pier body steel formwork with external pull rod, which comprises a formwork main body and a hoop ring fixedly installed on the side of the formwork main body. The opposite ends of the hoop ring are fixedly installed with pull ears, and the inner walls of the pull ears are movably connected with pressure receiving members.

[0008] The opposite sides of the inner walls of the pressure receiving members are jointly connected with springs, and the inner wall of the pressure receiving member on one side is fixedly installed with a jacking rod. The other end of the jacking rod extends through and penetrates to the outside of the pressure receiving member.

[0009] The opposite sides of the inner walls of the pressure receiving members are fixedly installed with support blocks, and the opposite sides of the two support blocks are rotatably connected with push rods. The ends of the two push rods away from the support blocks are jointly rotatably connected with a fixed disc. The surface of one side of the fixed disc is fixedly installed with an extension rod, and the end of the extension rod away from the fixed disc is fixedly installed with a limiting ring. The extension rod and the inner wall of the pressure receiving member are slidably connected.

[0010] Preferably, the pressure receiving part is hollow oval, a fixed cylinder is rotatably connected inside the pressure receiving part, a top plate is attached to one end of the fixed cylinder, a connecting body is fixedly installed at the end of the fixed cylinder away from the top plate, a limiting plate is fixedly installed at the end of the connecting body away from the fixed cylinder, and the side surface of the top plate is fixedly connected with the inner wall of the pull ear.

[0011] Preferably, a pull rod is movably connected inside the limiting plate, the pull rod is in through sliding connection with the limiting plate, the connecting body and the fixed cylinder, a sleeve is fixedly installed on the side of the pull rod, a fastening block is fixedly installed at one end of the pull rod, and threads are formed in the end surface of the pull rod away from the fastening block.

[0012] Preferably, the top rod is provided with a sliding block at one end, two inclined rods are fixedly installed on the side surface of the sliding block away from the top rod, and U-shaped rods are arranged on one side of the two inclined rods.

[0013] Preferably, two symmetrically distributed sliding grooves are formed in the outer side of the sleeve, guide grooves are formed in the inner walls of the opposite sides of the sliding grooves, the sliding grooves are in sliding connection with the inner part of the sliding block, and the outer side of the inclined rod is in sliding connection with the inner wall of the sliding groove.

[0014] Preferably, guide rods are fixedly connected to the opposite sides of the inner wall of the guide groove, a sliding frame is in sliding connection with the outer surface of the guide rod, and the sliding frame is fixedly connected with the U-shaped rod on one side.

[0015] Preferably, convex blocks are fixedly installed on the side surfaces of the two U-shaped rods, the convex blocks are located at the central positions of the U-shaped rods, and the convex blocks are movably connected with the side surface of the inclined rod.

[0016] Preferably, the top rod extends into the sliding groove at one end, and the side of the top rod is movably connected with the inner part of the sleeve.

[0017] Preferably, fixed blocks are fixedly installed on the opposite sides of the pull ear, the fixed blocks are in two groups, each group has two fixed blocks, the fixed blocks in each group are vertically installed, and the two ends of the U-shaped rod are inserted into the inner part of the fixed block.

[0018] Preferably, an annular groove is formed in the inner part of the pull ear, a limiting groove is formed in the inner wall of the annular groove, and the limiting ring is in clamping connection with the inner wall of the limiting groove.

[0019] Compared with the prior art, the pier body steel formwork provided with the external pull rod has the following beneficial effects:

[0020] 1. The present application can be closely combined with the inside of the pull ear to absorb part of the vibration by setting the pressure body, thereby avoiding the nut loosening, and can enhance the friction between the pull ear and the inside, ensuring the stability of the pull rod, so as to achieve the effect of stable use of the pull rod and nut fastening.

[0021] 2. The present application can produce a reverse thrust on the nut by setting the spring, and can also provide support power for the pressure body to restore the initial state, thereby achieving the effects of nut fastening and stable use of the pressure body.

[0022] 3. The present application can stabilize the pull rod by setting the telescopic rod, and can also buffer part of the vibration to avoid the nut loosening, thereby achieving the effects of stable use of the pull rod and nut fastening.

[0023] 4. The present application can be inserted into the inside of the fixed block, and then combined with the fixed block to share the stress of the pull rod, thereby avoiding the pull rod from breaking or deforming, so as to achieve the effects of stable use of the pull rod and increase the service life of the pull rod.

[0024] The parts not involved in the device are the same as or can be realized by the prior art, and the present application has simple structure and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The overall structure diagram of the pier body steel formwork with external pull rod is provided.

[0026] Figure 2 The enlarged structure diagram of the A place of the pier body steel formwork with external pull rod is provided.

[0027] Figure 3 The hoop structure diagram of the pier body steel formwork with external pull rod is provided.

[0028] Figure 4 The enlarged structure diagram of the B place of the pier body steel formwork with external pull rod is provided.

[0029] Figure 5 The pull rod structure diagram of the pier body steel formwork with external pull rod is provided.

[0030] Figure 6 The sleeve structure diagram of the pier body steel formwork with external pull rod is provided.

[0031] Figure 7 The enlarged structure diagram of the C place of the pier body steel formwork with external pull rod is provided.

[0032] Figure 8The sleeve section structure schematic diagram of the pier body steel formwork with external pull rod provided by the present application is shown in the figure.

[0033] Figure 9 The structure enlarged schematic diagram of the D place of the pier body steel formwork with external pull rod provided by the present application is shown in the figure.

[0034] Figure 10 The top rod structure schematic diagram of the pier body steel formwork with external pull rod provided by the present application is shown in the figure.

[0035] Figure 11 The structure enlarged schematic diagram of the E place of the pier body steel formwork with external pull rod provided by the present application is shown in the figure.

[0036] Figure 12 The compression piece structure schematic diagram of the pier body steel formwork with external pull rod provided by the present application is shown in the figure.

[0037] Figure 13 The compression piece section structure schematic diagram of the pier body steel formwork with external pull rod provided by the present application is shown in the figure.

[0038] Figure 14 The telescopic rod structure schematic diagram of the pier body steel formwork with external pull rod provided by the present application is shown in the figure.

[0039] Figure 15 The U-shaped rod structure schematic diagram of the pier body steel formwork with external pull rod provided by the present application is shown in the figure.

[0040] In the figure: 1, formwork main body; 11, hoop; 12, pull ear; 121, top plate; 123, fixed block; 125, ring groove; 126, limiting groove; 3, pull rod; 31, sleeve; 32, screw thread; 33, limiting plate; 331, connecting body; 34, fastening block; 35, U-shaped rod; 351, sliding frame; 356, protruding block; 36, compression piece; 361, telescopic rod; 3611, limiting ring; 3612, supporting block; 3613, fixed disc; 3614, push rod; 362, spring; 363, fixed cylinder; 37, top rod; 38, sliding block; 381, inclined rod; 39, sliding groove; 391, guide groove; 392, guide rod. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0042] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] Example: Pier steel formwork equipped with external tie rods, such as... Figures 1-15 As shown, the device includes a template body 1 and several hoops 11 fixedly installed around the template body 1. Each hoop 11 has a pull lug 12 fixedly installed at both ends. The pull lug 12 has an annular groove 125 inside, and a limit groove 126 is formed on the inner wall of the annular groove 125. Fixing blocks 123 are fixedly installed on both sides of each pull lug 12. There are two sets of fixing blocks 123, with two blocks in each set. Each set of fixing blocks 123 is vertically installed. A pressure-bearing component 36 is movably connected to the inner wall of the pull lug 12. The pressure-bearing component 36 is hollow and elliptical in shape. The pressure-bearing component 36 uses a... The spring steel material ensures the contraction deformation of the pressure-bearing component 36. The pressure-bearing component 36 is rotatably connected to a fixed cylinder 363, which has a telescopic effect, thus ensuring the contraction deformation of the pressure-bearing component 36. At the same time, the contraction of the pressure-bearing component 36 can fill the interior of the pull lug 12, thereby ensuring the stability of the pull rod 3 and the pressure-bearing component 36. Furthermore, the tight fit between the pressure-bearing component 36 and the interior of the pull lug 12 can reduce gaps, thereby reducing the transmission of vibration. The fixed cylinder 363 can also stabilize the expansion and contraction of the spring 362.

[0044] Furthermore, one end of the fixing cylinder 363 is attached to the top plate 121. The top plate 121 can support the compression of the pressure member 36 and limit its movement, preventing displacement of the pressure member 36 during compression. One side surface of the top plate 121 is fixedly connected to the inner wall of the pull lug 12. A connecting body 331 is fixedly installed at the end of the fixing cylinder 363 away from the top plate 121. When the pressure member 36 enters the pull lug 12, the tightening movement of the nut will be restricted by the outside of the pull lug 12. Therefore, the connecting body 331 extends the pressure member 36 at this point, thereby ensuring that the pressure member 36 can enter the pull lug 12. After the lug 12 is pulled inward, the movement caused by the tightening of the nut can continue to push the pressure member 36, thereby enabling the pressure member 36 to contract and deform. A limiting plate 33 is fixedly installed on the end of the connecting body 331 away from the fixed cylinder 363. The limiting plate 33 can again limit the pressure member 36, and at the same time, it can also push the pressure member 36, and reduce the direct friction between the nut and the pressure member 36 and the connecting body 331. A nut is rotatably connected to the side of the limiting plate 33 away from the connecting body 331. The nut is existing technology and will not be described in detail here, nor is it shown in the figure.

[0045] Further, the limiting plate 33 is movably connected with a pull rod 3, one end of the pull rod 3 is fixedly installed with a fastening block 34, the fastening block 34 can limit the movement of the pull rod 3 when the nut is screwed, and can also reduce the time of screwing the nut, thereby improving the work efficiency, the end surface of the pull rod 3 away from the fastening block 34 is provided with a thread 32, the pull rod 3 is in a penetrating sliding connection with the limiting plate 33, the connecting body 331 and the fixed cylinder 363, the pull rod 3 is fixedly installed with a sleeve 31, two symmetrically distributed sliding grooves 39 are formed in the outer side of the sleeve 31, the sliding grooves 39 are in sliding connection with the sliding blocks 38, guide grooves 391 are formed in the inner walls of the two sliding grooves 39, guide rods 392 are fixedly connected with the inner walls of the guide grooves 391, sliding frames 351 are slidingly connected with the outer surfaces of the guide rods 392, the sliding frames 351 can guide the movement of the U-shaped rods 35 when the U-shaped rods 35 are subjected to a pushing force, and can also ensure that the U-shaped rods 35 will not be laterally displaced, one side of the sliding frame 351 is fixedly connected with the U-shaped rod 35, springs 362 are fixedly connected with the inner walls of the pressure receiving members 36, the springs 362 can assist the pressure receiving members 36 to return to the initial position, and can also generate a pushing force when the pressure receiving members 36 are contracted, the pushing force can be transmitted to the nut through the pressure receiving members 36, thereby preventing the nut from being loosened when subjected to vibration;

[0046] Further, the inner wall of the pressure receiving member 36 is fixedly installed with a jacking rod 37, one end of the jacking rod 37 extends into the sliding groove 39, and the initial state of the jacking rod 37 is located in the sliding groove 39, thereby ensuring that the sliding block 38 can be accurately and quickly pushed to move, the jacking rod 37 is movably connected with the inner part of the sleeve 31, one end of the jacking rod 37 is provided with the sliding block 38, two inclined rods 381 are fixedly installed on the surface of the sliding block 38 away from the jacking rod 37, the outer sides of the two inclined rods 381 are slidingly connected with the inner walls of the sliding grooves 39, the two U-shaped rods 35 are arranged on one side of the two inclined rods 381, the initial state of the U-shaped rod 35 can pass through the fixing hole on the pull ear 12, therefore, other components will not be affected by the fixing hole on the pull ear 12, the two ends of the U-shaped rod 35 are inserted into the inner part of the fixed block 123, the initial position of the U-shaped rod 35 is perpendicular to the insertion hole in the fixed block 123, thereby ensuring that the U-shaped rod 35 can be smoothly inserted into the fixed block 123, when the pulling force acting on the pull rod 3 increases, the U-shaped rod 35 and the fixed block 123 can share the pulling force, thereby ensuring that the pull rod 3 will not be pulled out or deformed, the two U-shaped rods 35 are fixedly installed with protrusions 356 on the surfaces of one side, the protrusions 356 are arc-shaped, can better contact with the inclined rods 381, and the protrusions 356 are located at the center position of the U-shaped rod 35, this arrangement can ensure that the stress point is concentrated when the protrusions 356 contact with the inclined rods 381, the pushing force of the inclined rods 381 can be more accurately transmitted to the U-shaped rod 35, and the movement distance of the U-shaped rod 35 can be ensured, so that the U-shaped rod 35 is more tightly inserted into the fixed block 123, thereby improving the movement efficiency of the U-shaped rod 35 and the protection effect on the pull rod 3;

[0047] Further, the convex block 356 is movably connected with one side surface of the inclined rod 381, the other end of the top rod 37 extends to the outside of the pressure receiving part 36, the top rod 37 is slidably connected with the pressure receiving part 36, the inner wall of the pressure receiving part 36 is fixedly connected with two support blocks 3612 on opposite sides, the two support blocks 3612 are rotatably connected with two push rods 3614 on opposite sides, the ends of the two push rods 3614 away from the support blocks 3612 are rotatably connected with a fixed disc 3613, the side surface of the fixed disc 3613 is fixedly connected with an extension rod 361, the end of the extension rod 361 away from the fixed disc 3613 is fixedly connected with a limiting ring 3611, the limiting ring 3611 is clamped with the inner wall of the limiting groove 126, the limiting ring 3611 is made of rubber material, so that the clamping with the limiting groove 126 is tight, and the effect of buffering vibration is also achieved, the extension rod 361 is slidably connected with the inner wall of the pressure receiving part 36, and the initial state of the extension rod 361 is located in the inside of the pressure receiving part 36, so that the pressure receiving part 36 can smoothly enter the inside of the pull ear 12, and the extension rod 361 can quickly and accurately extend to the outside of the pressure receiving part 36;

[0048] Compared with the prior art, the pressure receiving part 36 made of alloy spring steel material with shrinkable deformation is adopted, and the internal spring 362 is matched, so that the elastic structure of pressure receiving shrinkage and force releasing recovery is formed, compared with the rigid connecting piece of the prior art, the pressure receiving part 36 can be tightly combined with the inside of the pull ear 12 through its own deformation to absorb part of the vibration, so that the loosening of the nut is avoided, and the stability between the pressure receiving part 36 and the pull ear 12 is enhanced, at the same time, the spring 362 stores elastic potential energy when being pressed, and actively pushes the pressure receiving part 36 to reset after the external force disappears, so that the use stability of the pressure receiving part 36 is ensured, and the reverse thrust is generated to further ensure the stability of the nut;

[0049] The telescopic ability of the fixed cylinder 363 not only stabilizes the telescopic of the spring 362, but also provides the guiding effect for the deformation of the pressure receiving part 36, and the limiting ring 3611 made of rubber material is clamped with the limiting groove 126 in the pull ear 12 by the extension rod 361, so that the circumferential fixation of the pressure receiving part 36 is realized, the stability of the pull rod 3 is enhanced, and the rubber material has the effects of buffering vibration and sealing, so that the stability of the nut is ensured;

[0050] The pressure receiving part 36 can push the top rod 37 when being shrunk, the top rod 37 pushes the sliding block 38, so that the inclined rod 381 is moved by the sliding block 38, the U-shaped rod 35 is driven to slide along the guide rod 392 by the convex block 356, and finally the U-shaped rod 35 is inserted with the fixed block 123, the linkage mechanism can automatically disperse part of the pulling force to the fixed block 123 of the pull ear 12 when the pulling force of the pull rod 3 increases, so that the composite force system of the main pulling force of the pull rod 3 and the auxiliary sharing of the U-shaped rod 35 is formed, and the defect that the pull rod 3 alone bears all the pulling force in the prior art is solved.

[0051] Working principle: when installing the pull rod 3, first assemble the template body 1, then insert the pull rod 3 into the pull ear 12, the pull rod 3 with sleeve 31 and U-shaped rod 35 is inserted into the pull ear 12, and the fastening block 34 is tightly attached to one side of the pull ear 12, the sleeve 31 and the U-shaped rod 35 are located between the two pull ears 12, and the end of the pull rod 3 with the thread 32 is located on the side of the other pull ear 12, at this time the fixed cylinder 363 is inserted with the pull rod 3, and the thread 32 does not affect the fixed cylinder 363, and the fixed cylinder 363 drives the pressure receiving part 36 to move, the connecting body 331 on one side of the pressure receiving part 36 moves, the limiting plate 33 can be driven by the movement of the connecting body 331, the limiting plate 33 drives the nut to move, when the nut contacts the thread 32, the nut stops moving, and the pressure receiving part 36 and the fixed cylinder 363 stop moving, at this time the nut is twisted, the nut is engaged with the thread 32, the pressure receiving part 36 and the fixed cylinder 363 can move again through the engagement and movement of the nut, when the pressure receiving part 36 enters the inside of the pull ear 12, the jack 37 has moved to one end of the sleeve 31 at this time, the jack 37 is adjusted at this time to align with one end of the sleeve 31, to ensure that the jack 37 can penetrate into the inside of the sleeve 31, at this time the nut is continued to be twisted, the pressure receiving part 36 can be completely moved into the inside of the pull ear 12, and the pressure receiving part 36 is limited by the top plate 121, the pressure receiving part 36 stops moving, and the jack 37 stops moving, and the jack 37 is located in the sliding groove 39 at one end, then the nut is continued to be twisted, the nut can extrude the limiting plate 33, the limiting plate 33 extrudes the connecting body 331, the connecting body 331 transmits the extrusion force to the pressure receiving part 36, and then the pressure receiving part 36 starts to shrink under the support of the top plate 121, when the pressure receiving part 36 starts to shrink, the inner wall of the pressure receiving part 36 starts to approach the center point, so that the support block 3612 approaches another support block 3612, the two support blocks 3612 can extrude and push the push rod 3614 by approaching each other, at this time the push rod 3614 approaches each other, and one end of the push rod 3614 moves upward, the fixed disc 3613 can move upward through the movement of the push rod 3614, and then the telescopic rod 361 starts to move outward from the pressure receiving part 36 under the drive of the fixed disc 3613, when the nut continues to be twisted to generate extrusion force, the telescopic rod 361 can move into the ring groove 125 on the pull ear 12, and at the same time the limiting ring 3611 on the telescopic rod 361 starts to deform under the extrusion of the nut, and the limiting ring 3611 enters the limiting groove 126 on the ring groove 125, and at the same time when it enters the limiting groove 126, the limiting ring 3611 quickly recovers to the initial state, thereby generating the effect of clamping with the limiting groove 126, and when the limiting ring 3611 and the limiting groove 126 complete the clamping, the shrinkage of the pressure receiving part 36 stops, and the nut cannot be twisted any more, at this time the pressure receiving part 36 is tightly attached to the inside of the pull ear 12, which ensures that the nut is twisted in place,When the inner wall of the pressure receiving part 36 moves to the center point of the pressure receiving part 36, the top rod 37 starts to move and slide on the inner wall of the pressure receiving part 36. When the top rod 37 starts to move, the top rod 37 can push the sliding block 38. At this time, the sliding block 38 starts to slide on the sliding groove 39. The sliding of the sliding block 38 can push the inclined rod 381. Since the horizontal rod of the lower half of the U-shaped rod 35 is in an arc shape, the inclined rod 381 can move to the lower side of the U-shaped rod 35 and move to the center point of the U-shaped rod 35. At this time, the inclined rod 381 can press and push upward the protrusion 356 on the U-shaped rod 35. Through the force of the protrusion 356, the U-shaped rod 35 can drive the sliding frame 351 to move along the guide rod 392. When the pressure receiving part 36 stops shrinking, the two ends of the U-shaped rod 35 are inserted into the fixed block 123, thereby completing the installation of the U-shaped rod 35 and the fixed block 123, and completing the installation of the pull rod 3.

[0052] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A pier body steel form with peripheral pull rod, comprising a form body (1), and a hoop (11) fixedly installed on the peripheral side of the form body (1), characterized in that, The hoop (11) is fixedly installed with a pull ear (12) at opposite ends, and the inner wall of the pull ear (12) is movably connected with a pressure receiving part (36); The inner wall of the pressure receiving part (36) is connected with a spring (362) on opposite sides, and the inner wall of the pressure receiving part (36) is fixedly installed with a top rod (37) on one side; the other end of the top rod (37) extends to the outside of the pressure receiving part (36); The inner wall of the pressure receiving part (36) is fixedly installed with a support block (3612) on opposite sides, and the opposite sides of the two support blocks (3612) are rotatably connected with a push rod (3614); the ends of the two push rods (3614) away from the support blocks (3612) are rotatably connected with a fixed disc (3613), and the side surface of the fixed disc (3613) is fixedly installed with an extension rod (361); the end of the extension rod (361) away from the fixed disc (3613) is fixedly installed with a limiting ring (3611), and the extension rod (361) is slidably connected with the inner wall of the pressure receiving part (36); The inside of the pressure receiving part (36) is rotatably connected with a fixed cylinder (363), one end of the fixed cylinder (363) is attached with a top plate (121), and the end of the fixed cylinder (363) away from the top plate (121) is fixedly installed with a connecting body (331); the end of the connecting body (331) away from the fixed cylinder (363) is fixedly installed with a limiting plate (33); The inside of the pull ear (12) is provided with an annular groove (125), and the inner wall of the annular groove (125) is provided with a limiting groove (126); the circumferential side of the limiting ring (3611) is interlocked with the inner wall of the limiting groove (126). The side of the limiting plate (33) away from the connecting body (331) is rotatably connected with a nut.

2. The pier body steel form with external tie rod according to claim 1, characterized in that, The pressure receiving part (36) is hollow and oval, and the side surface of the top plate (121) is fixedly connected with the inner wall of the pull ear (12).

3. The pier body steel form with external tie rod according to claim 2, characterized in that, The inside of the limiting plate (33) is movably connected with a pull rod (3), the pull rod (3) is in through sliding connection with the inside of the limiting plate (33), the connecting body (331) and the fixed cylinder (363), the circumferential side of the pull rod (3) is fixedly installed with a sleeve (31), one end of the pull rod (3) is fixedly installed with a fastening block (34), and the end surface of the pull rod (3) away from the fastening block (34) is provided with a screw thread (32).

4. The pier body steel form with external tie rod according to claim 3, characterized in that, One end of the top rod (37) is provided with a sliding block (38), the side surface of the sliding block (38) away from the top rod (37) is fixedly installed with two inclined rods (381), and the side surface of each of the two inclined rods (381) is provided with a U-shaped rod (35).

5. The pier body steel form with external tie rod according to claim 4, wherein, The outside of the sleeve (31) is provided with two symmetrically distributed sliding grooves (39), the inner wall of each of the two sliding grooves (39) is provided with a guide groove (391) on opposite sides, the inner wall of the sliding groove (39) is in sliding connection with the inside of the sliding block (38), and the outside of the inclined rod (381) is in sliding connection with the inner wall of the sliding groove (39).

6. The pier body steel form with external tie rod according to claim 5, wherein, The inner wall of the guide groove (391) is fixedly connected with a guide rod (392) on opposite sides, the outer surface of the guide rod (392) is slidably connected with a sliding frame (351), and one side of the sliding frame (351) is fixedly connected with the U-shaped rod (35).

7. The pier body steel form with external tie rod according to claim 6, wherein, The side surface of each of the two U-shaped rods (35) is fixedly connected with a protrusion (356), and the protrusion (356) is located at the center of the U-shaped rod (35). The protrusion (356) is movably connected with the side surface of the inclined rod (381).

8. The steel formwork with external tie rod for pier shaft according to claim 4, characterized in that, One end of the top rod (37) extends into the sliding groove (39), and the top rod (37) is movably connected with the inside of the sleeve (31).

9. The steel formwork with external tie rod for pier shaft according to claim 4, characterized in that, The opposite sides of the two pull ears (12) are fixedly connected with a fixed block (123), the fixed block (123) is divided into two groups, each group has two fixed blocks (123), and each group of fixed blocks (123) is vertically installed. The two ends of the U-shaped rod (35) are inserted into the inside of the fixed block (123).

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