Pry bar assembly of pre-embedded steel pull rod and rotary drawing-out system

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a pinch bar assembly of a pre-embedded steel pull rod and a rotary extraction system, which comprise an L-shaped pinch bar and a protective sleeve, the protective sleeve is a hollow sleeve with one end provided with a cap, and the outer diameter of the hollow sleeve is matched with the inner diameter of a hole of an upper lug plate of the embedded steel pull rod. The end part of one end of the L-shaped pry bar is sleeved with the protective sleeve, and the protective sleeve is in threaded connection with the L-shaped pry bar; and the end part of the L-shaped pinch bar is also provided with a lifting ring hole. Compared with the prior art, the problem that in the prior art, a reliable connecting structure is lacked when the embedded steel pull rod is dismounted is solved, and the reliable connecting structure in the hoisting process is achieved through the pry bar assembly in the scheme.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building construction, and particularly relates to a pry bar assembly and rotating extraction system of a pre-embedded steel pull rod. BACKGROUND

[0002] The steel truss system of the beam string structure is widely applied to deep foundation pit engineering, and the steel pull rod at the two ends of the beam string structure usually needs to be pre-embedded in the crown beam or waist beam concrete, so that when the support is removed, the steel pull rod pipe of the pre-embedded section needs to be removed by the rotating extraction mode.

[0003] At present, the construction site usually uses: a sling is wound around the pre-embedded steel pull rod for several turns, and then a truck-mounted crane is vertically pulled upward; or a common steel pipe is inserted into the lug plate of the pre-embedded steel pull rod, and then a sling is bound to the common steel pipe, and then a truck-mounted crane is vertically pulled upward.

[0004] However, the above two construction methods have the following problems:

[0005] ① The initial static friction of the sling directly bound to the lug plate of the pre-embedded steel pull rod is large, which may be greater than the ultimate bearing capacity of the sling, and thus the sling is suddenly broken in the lifting process, which can cause the truck-mounted crane to suddenly shake seriously, and can cause serious safety accidents.

[0006] ② The hole of the lug plate of the pre-embedded steel pull rod is usually large in diameter, and the common steel pipe commonly prepared on the construction site is small in diameter, which can easily cause the steel pipe to be seriously deformed and damaged in the lifting process, and the sling, the common steel pipe and the lug plate of the pre-embedded steel pull rod are only simply wound and lack reliable connection, and the three are easy to scatter, which has certain safety hazards.

[0007] Therefore, it is necessary to provide a pry bar assembly suitable for a pre-embedded steel pull rod to provide reliable connection for the lifting process. UTILITY MODEL CONTENTS

[0008] The utility model discloses a pry bar assembly and rotating extraction system of a pre-embedded steel pull rod to solve at least one of the above problems, to solve the problem that reliable connection structure is lacked in the prior art when the pre-embedded steel pull rod is removed, and the pry bar assembly is adopted to realize reliable connection structure in the lifting process.

[0009] The utility model discloses a pry bar assembly and rotating extraction system of a pre-embedded steel pull rod to solve at least one of the above problems, to solve the problem that reliable connection structure is lacked in the prior art when the pre-embedded steel pull rod is removed, and the pry bar assembly is adopted to realize reliable connection structure in the lifting process.

[0010] The utility model discloses a pry bar assembly and rotating extraction system of a pre-embedded steel pull rod to solve at least one of the above problems, to solve the problem that reliable connection structure is lacked in the prior art when the pre-embedded steel pull rod is removed, and the pry bar assembly is adopted to realize reliable connection structure in the lifting process.

[0011] The protection sleeve is a hollow sleeve with a cap at one end, and the outer diameter of the hollow sleeve matches the inner diameter of the hole of the lug plate of the pre-embedded steel pull rod.

[0012] The protective sleeve is sleeved on one end of the L-shaped crowbar, and the protective sleeve is threadedly connected with the L-shaped crowbar.

[0013] The end of the L-shaped crowbar is also provided with a lifting eye hole.

[0014] Preferably, the diameter of the cap is larger than the inner diameter of the hole of the ear plate.

[0015] Preferably, a nut is fixed on the end of the L-shaped crowbar, a bolt hole is formed on the cap, and the protective sleeve is threadedly connected with the L-shaped crowbar through the bolt passing through the bolt hole and being threadedly connected with the nut.

[0016] Preferably, the nut is welded on the end of the L-shaped crowbar.

[0017] Preferably, the nut is fixed on the center of the end of the L-shaped crowbar, and the bolt hole is formed on the center of the cap.

[0018] Preferably, the side of the end of the L-shaped crowbar is provided with a circular arc chamfer structure.

[0019] Preferably, the length of the circular arc chamfer is not less than the length of the hollow sleeve.

[0020] Preferably, the L-shaped crowbar comprises a long rod and a short rod arranged vertically.

[0021] Preferably, the two ends of the L-shaped crowbar are both provided with a lifting eye hole.

[0022] The second aspect of the utility model discloses a rotating and extracting system of pre-buried steel pull rod, which comprises a hoisting device, a lifting belt, a lifting eye and the crowbar assembly as any one of the above;

[0023] The protective sleeve is used for embedding the ear plate opening of the pre-buried steel pull rod, and the protective sleeve is sleeved on one end of the L-shaped crowbar through thread connection.

[0024] The L-shaped crowbar is connected with the lifting eye through the lifting eye hole of the end without the sleeved protective sleeve.

[0025] The lifting belt is connected with the lifting eye and the hoisting device.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] 1. The crowbar assembly is of an assembled structure, and the assembling process is convenient and fast.

[0028] 2. The cap on the protective sleeve can prevent the pry bar assembly from being separated from the ear plate, and the hollow sleeve can prevent the L-shaped pry bar from being squeezed and scratching the inner wall of the ear plate, thereby playing a reliable connection and protection component role.

[0029] 3. The connection between the sling, the lifting ring and the lifting ring hole is reliable, which can prevent the risk of falling off. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structural diagram of a pry bar assembly;

[0031] Figure 2 It is a structural diagram of a protective sleeve;

[0032] Figure 3 It is an L-shaped pry bar;

[0033] Figure 4 It is a structural diagram of a pry bar assembly in one use scenario;

[0034] Figure 5 It is a structural diagram of a pry bar assembly in another use scenario;

[0035] In the figure: 1-L-shaped pry bar; 2-protective sleeve; 3-bolt; 11-lifting ring hole; 12-nut; 13-long rod; 14-short rod; 15-circular arc chamfer; 21-hollow sleeve; 22-cap; 23-bolt hole; 100-embedded steel rod; 200-ear plate; 300-lifting ring. DETAILED DESCRIPTION

[0036] The utility model will be described in detail below in combination with the drawings and specific embodiments.

[0037] Embodiment 1

[0038] A pry bar assembly of an embedded steel rod 100, as shown in the figure, comprises an L-shaped pry bar 1 and a protective sleeve 2. Figures 1-3

[0039] The protective sleeve 2 is a hollow sleeve 21 provided with a cap 22 at one end, and the outer diameter of the hollow sleeve 21 matches the hole inner diameter of the ear plate 200 on the embedded steel rod 100.

[0040] The protective sleeve 2 is sleeved on one end of the L-shaped pry bar 1, and the protective sleeve 2 is threadedly connected with the L-shaped pry bar 1.

[0041] The end of the L-shaped pry bar 1 is also provided with a lifting ring hole 11.

[0042] More specifically, in this embodiment:

[0043] ​The pry bar assembly mainly consists of an L-shaped pry bar 1 and a protective sleeve 2. The protective sleeve 2 is fitted onto one end of the L-shaped pry bar 1 and is used to reliably connect to the lug plate 200 of the pre-embedded steel tie rod 100. The other end of the L-shaped pry bar 1 is used to connect to lifting equipment via a lifting ring 300 and slings, such as... Figure 1 As shown (for ease of demonstrating the specific structure), Figure 1 Protective sleeves 2 are fitted on both ends of the L-shaped pry bar 1. In actual use, the protective sleeve 2 is only fitted on one end of the L-shaped pry bar 1.

[0044] like Figure 2 As shown, the protective sleeve 2 has a specific structure, consisting of a cylindrical hollow sleeve 21 and a disc-shaped cap 22. One end of the hollow sleeve 21 is open for inserting into the end of the L-shaped pry bar 1, while the other end is closed by the cap 22. The outer diameter of the hollow sleeve 21 must match the inner diameter of the opening in the ear plate 200 of the pre-embedded steel tie rod 100, and the length of the hollow sleeve 21 is preferably longer than the thickness of the ear plate 200. This ensures a stable and reliable connection after the protective sleeve 2 is embedded into the ear plate 200 of the pre-embedded steel tie rod 100, and also protects the inner wall of the opening in the ear plate 200. The diameter of the cap 22 is larger than the diameter of the hollow sleeve 21 and the inner diameter of the opening of the ear plate 200 of the embedded steel tie rod 100. This allows the cap 22 to abut against the side of the ear plate 200 after the protective sleeve 2 is inserted into the opening of the ear plate 200 of the embedded steel tie rod 100 through the opening end of the hollow sleeve 21. This prevents the protective sleeve 2 from penetrating the ear plate 200 and failing to provide a connection, and also prevents sudden disengagement between the pry bar assembly and the ear plate 200. Furthermore, a bolt hole 23 is located in the center of the cap 22 for connecting the L-shaped pry bar 1.

[0045] like Figure 3 As shown, the L-shaped pry bar 1 has a structure consisting of a long rod 13 and a short rod 14 arranged vertically, which facilitates force transmission during use. A lifting eyelet hole 11 is provided at the end of both the long rod 13 and the short rod 14 for inserting a lifting eyelet 300. A nut 12 is welded and fixed to the center of the end face of both the long rod 13 and the short rod 14, forming a threaded connection after the bolt 3 passes through the bolt hole 23 on the cap 22, allowing the protective sleeve 2 to be fitted and fixed to the end of the L-shaped pry bar 1. Furthermore, to facilitate the fitting of the protective sleeve 2 to the end of the L-shaped pry bar 1 and to reduce wear on the protective sleeve 2, rounded chamfers 15 (with a rounded rectangular cross-section) are provided on the side edges of the ends of the long rod 13 and the short rod 14. The length of the rounded chamfer 15 should not be less than the length of the hollow sleeve 21.

[0046] Example 2

[0047] A rotating extraction system for a pre-embedded steel tie rod 100 includes lifting equipment, slings, lifting rings 300, and the pry bar assembly described in Example 1;

[0048] The protective sleeve 2 is used to embed the ear plate 200 opening of the embedded steel pull rod 100, and the protective sleeve 2 is sleeved on one end of the L-shaped pry bar 1 through threaded connection;

[0049] The L-shaped pry bar 1 is connected with the lifting ring 300 through the lifting ring hole 11 of the end not sleeved with the protective sleeve 2.

[0050] The lifting belt connects the lifting ring 300 and the lifting equipment.

[0051] The lifting ring 300 in the embodiment is a square ring structure as shown in Figure 4 、 5 The lifting equipment uses a crane commonly seen on construction sites.

[0052] The pry bar assembly and the rotating extraction system are used as shown in Figure 4 、 5 There are two cases:

[0053] ① When the ear plate 200 is horizontally arranged, the axis of the hole on the ear plate 200 is vertical as shown in Figure 4 First, the hollow sleeve 21 of the protective sleeve 2 is inserted into the ear plate 200 opening of the embedded steel pull rod 100 and the cap 22 is attached to the side wall surface of the ear plate 200, then the end of the short rod 14 of the L-shaped pry bar 1 is inserted into the hollow sleeve 21, the bolt 3 is passed through the bolt hole 23 and locked with the nut 12, the lifting ring hole 11 at the end of the long rod 13 of the L-shaped pry bar 1 is inserted into the lifting ring 300, and finally the lifting belt is connected with the lifting ring 300 and the lifting equipment respectively, completing the connection of the whole assembly and system. When running, the crane pulls vertically, which can drive the rotation of the embedded steel pull rod 100 through the pry bar assembly and the ear plate 200.

[0054] ② When the ear plate 200 is vertically arranged, the axis of the hole on the ear plate 200 is horizontal as shown in Figure 5 First, the hollow sleeve 21 of the protective sleeve 2 is inserted into the ear plate 200 opening of the embedded steel pull rod 100 and the cap 22 is attached to the side wall surface of the ear plate 200, then the end of the long rod 13 of the L-shaped pry bar 1 is inserted into the hollow sleeve 21, the bolt 3 is passed through the bolt hole 23 and locked with the nut 12, the lifting ring hole 11 at the end of the short rod 14 of the L-shaped pry bar 1 is inserted into the lifting ring 300, and finally the lifting belt is connected with the lifting ring 300 and the lifting equipment respectively, completing the connection of the whole assembly and system. When running, the crane pulls vertically, which can drive the rotation of the embedded steel pull rod 100 through the pry bar assembly and the ear plate 200.

[0055] The above description of the embodiments is to facilitate the ordinary skilled in the art to understand and use the utility model. The person skilled in the art can obviously easily make various modifications to these embodiments, and the general principles described herein are applied to other embodiments without the need for creative labor. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by the person skilled in the art according to the disclosure of the utility model without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims

1. A pry bar assembly with a pre-embedded steel tie rod, characterized in that, The L-shaped lever (1) and the protective sleeve (2) are included. The protective sleeve (2) is a hollow sleeve (21) with a cap (22) at one end, and the outer diameter of the hollow sleeve (21) matches the inner diameter of the hole of the ear plate (200) of the embedded steel pull rod (100). The protective sleeve (2) is sleeved on one end of the L-shaped lever (1), and the protective sleeve (2) is threadedly connected with the L-shaped lever (1). The end of the L-shaped lever (1) is also provided with a lifting eye hole (11).

2. A pry bar assembly for a pre-buried steel tension rod according to claim 1, wherein, The diameter of the cap (22) is greater than the inner diameter of the hole of the ear plate (200).

3. A pry bar assembly for a pre-buried steel tension rod according to claim 1, wherein, The end of the L-shaped lever (1) is fixed with a nut (12), the cap (22) is provided with a bolt hole (23), and the protective sleeve (2) and the L-shaped lever (1) are connected by the bolt (3) passing through the bolt hole (23) and being threadedly connected with the nut (12).

4. A pry bar assembly for a pre-buried steel tension rod according to claim 3, wherein, The nut (12) is welded to the end of the L-shaped lever (1).

5. A pry bar assembly for a pre-embedded steel pull rod according to claim 3, wherein, The nut (12) is fixed at the center of the end of the L-shaped lever (1), and the bolt hole (23) is arranged at the center of the cap (22).

6. A pry bar assembly for a pre-buried steel tension rod according to claim 1, wherein, The side of the end of the L-shaped lever (1) is provided with a circular arc chamfer (15).

7. A pry bar assembly for a pre-buried steel tension rod according to claim 6, wherein, The length of the circular arc chamfer (15) is not less than the length of the hollow sleeve (21).

8. A pry bar assembly for a pre-embedded steel pull rod according to claim 1, wherein, The L-shaped lever (1) includes a vertical long rod (13) and a short rod (14).

9. A pry bar assembly for a pre-embedded steel pull rod according to claim 1, wherein, The two ends of the L-shaped lever (1) are provided with lifting eye holes (11).

10. A system for rotational extraction of a pre-embedded steel pull rod, characterized in that, The lifting device, the lifting belt, the lifting eye (300) and the lever assembly of any one of claims 1-9 are included. The protective sleeve (2) is used to fit the ear plate (200) opening of the embedded steel pull rod (100), and the protective sleeve (2) is threadedly connected with one end of the L-shaped lever (1). The L-shaped lever (1) is connected with the lifting eye (300) through the lifting eye hole (11) of the end without the protective sleeve (2). The lifting belt connects the lifting eye (300) and the lifting device.

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