Traction clamp for PCCP (prestressed concrete cylinder pipe) pressure tapping operation

Abstract

The utility model relates to the technical field of pipeline operation, and discloses a traction clamp for PCCP (prestressed concrete cylinder pipe) pressure tapping operation, which is used in the process of welding a reinforcing plate to a prestressed steel wire at an opening of a PCCP and comprises a threaded cylinder, a threaded rod, a steel wire rope and an alligator clip. The PCCP comprises a concrete layer, a steel cylinder layer, a prestressed steel wire layer and a mortar protection layer which are sequentially distributed from inside to outside. Before construction, the mortar protection layer in the construction area is polished away, and the prestressed steel wires can be exposed out of the opening. During construction, after the reinforcing plate is temporarily bound on the surface of the exposed prestressed steel wire, the two alligator clips can respectively clamp two point positions of the prestressed steel wire outside the edges of the two sides of the reinforcing plate. And then the threaded cylinder is rotated, and the extension length of the two threaded rods can be changed through the interaction between threads, so that the two steel wire ropes are tightened. Traction force can be applied to the prestressed steel wire in advance, pipe explosion accidents caused by stress relaxation of the prestressed steel wire in follow-up welding or drilling operation are avoided, and the technical problem of under-pressure trepanning repair is solved.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline operations, for example, to a traction clamp for PCCP pipe pressure opening operations. Background Art

[0002] Currently, prestressed concrete cylinder pipe (PCCP) is widely used in long-distance, inter-basin water diversion projects, municipal water supply projects, and circulating water systems for large thermal power plants and nuclear power plants. With its widespread application, the challenge of drilling holes along the side of the pipe wall to add new outlets without shutting off the flow of water has become a pressing technical challenge.

[0003] During drilling operations for prestressed concrete cylinder pipe (PCCP), stress relaxation or loss can occur during welding or after the prestressing wire is severed. This sudden stress relaxation or loss can easily lead to pipe bursts and other accidents. Therefore, research into hot-drilling technology and related equipment is being conducted to create conditions for its wider application and provide specialized services to users of installed pipelines.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide a traction clamp for PCCP pipe pressure tapping operations to solve the problems raised in the above-mentioned background technology.

[0007] In some embodiments, a traction clamp for PCCP pipe pressure opening operations is used in the process of welding a reinforcement plate to the prestressed steel wire at the opening of the PCCP pipe, and includes: a threaded barrel; a threaded rod, respectively threadedly connected to the two ends of the threaded barrel; a steel wire rope, respectively connected to the two threaded rods; an alligator clip, respectively connected to the two steel wire ropes, the two alligator clips respectively clamping two points of the prestressed steel wire, the reinforcement plate fits the prestressed steel wire and is pressed by the two steel wire ropes; wherein the threaded barrel is controlled to rotate relative to the threaded rods at both ends to tighten the two steel wire ropes.

[0008] Optionally, each of the alligator clips includes: a latch pin; a first clamping arm rotatably mounted on the pin shaft, the first clamping arm including a first driving end and a first clamping end; a second clamping arm rotatably mounted on the pin shaft and cross-distributed with the first clamping arm, the second clamping arm including a second driving end and a second clamping end, the second driving end being opposite to the first driving end, and the second clamping end being opposite to the first clamping end; a spring installed between the first driving end and the second driving end for providing elastic force; wherein, under the elastic force of the spring, the first clamping end and the second clamping end have a tendency to move closer to each other.

[0009] Optionally, each of the alligator clips further includes: a bolt, the rod of which is passed through the first clamping end and the second clamping end; and a nut threadedly connected to the bolt; wherein the first clamping end and the second clamping end are located between the nut and the head of the bolt.

[0010] Optionally, each of the alligator clips further comprises: a clamping block, respectively mounted on opposite surfaces of the first clamping end and the second clamping end, the two clamping blocks each comprising a groove, the shapes of the two grooves matching the shape of the prestressed steel wire; wherein, when the alligator clip clamps the prestressed steel wire, the prestressed steel wire is located in the two grooves.

[0011] Optionally, each of the alligator clips further comprises a buckle body, which is sleeved on the pin and is used to be connected to the wire rope.

[0012] Optionally, it further includes: hooks, which are respectively connected to the ends of the two threaded rods and are both located outside the threaded barrel, and the two hooks are respectively suspended on the two steel ropes.

[0013] Optionally, it further includes: buckles, which are respectively installed at both ends of each of the steel wire ropes; wherein, when the buckles at both ends are tightened, both ends of each of the steel wire ropes form lifting ears.

[0014] Optionally, it further includes: pads, which are placed between the two steel ropes and the reinforcement plates respectively.

[0015] Optionally, it further includes: rollers, which are respectively installed on the two pads and respectively abut against the two steel ropes.

[0016] The embodiment of the present disclosure provides a traction clamp for PCCP pipe pressure tapping operations, which can achieve the following technical effects:

[0017] The embodiment of the present disclosure provides a traction clamp for PCCP pipe pressure opening operations, which is used in the process of welding a reinforcement plate to the prestressed steel wire at the opening of the PCCP pipe, and includes a threaded barrel, a threaded rod, a wire rope, and an alligator clip. The threaded rod is threadedly connected to the two ends of the threaded barrel, and the threaded connection method has a self-locking function and is easy to adjust. The wire ropes are respectively connected to the two threaded rods, and the two wire ropes move under the drive of the two threaded rods. The alligator clips are respectively connected to the two wire ropes, and the two alligator clips clamp the two points of the prestressed steel wire respectively, so that the wire ropes can be tightened inward from the two clamped points. The reinforcement plate fits the prestressed steel wire and is pressed by the two wire ropes, so that the reinforcement plate can fit only the prestressed steel wire. The threaded barrel is controlled to rotate relative to the threaded rods at both ends to tighten the two wire ropes.

[0018] The disclosed embodiments provide a traction clamp for hot-drilling PCCP pipes, designed for use during the welding of reinforcement plates to prestressed steel wires at the opening of a PCCP pipe. The PCCP comprises, from the inside out, a concrete layer, a steel cylinder layer, a prestressed steel wire layer, and a protective mortar layer. Before construction, the protective mortar layer in the construction area is sanded off, exposing the prestressed steel wires at the opening. During construction, after the reinforcement plate is placed on the exposed prestressed steel wires, two alligator clips are clamped onto the prestressed steel wires at two points beyond the edges of the reinforcement plate. The threaded cylinder is then rotated, and the interaction between the threads changes the extension length of the two threaded rods, thereby tightening the two steel cables. Once the two cables are tightened, the reinforcement plate is firmly attached to the prestressed steel wires, allowing subsequent welding of the reinforcement plate and prestressed steel wires. Furthermore, traction can be applied to the prestressed steel wires in advance, preventing sudden stress relaxation or loss in the prestressed steel wires during subsequent welding or drilling operations, potentially leading to pipe bursts and other accidents. This addresses the technical challenges of hot-drilling repair for PCCP pipes. Once welding is complete and the weld has cooled, the clamps can be removed. The prestressing wire remains beneath the reinforcement plate, allowing subsequent drilling. With the reinforcement plate in place, sufficient prestressing force is maintained even if the prestressing wire beneath is severed.

[0019] Furthermore, after placing the reinforcement plate on the exposed prestressed steel wire, you can temporarily secure the reinforcement plate by wrapping it with ropes, steel wires, or elastic bands to determine its position and prevent it from moving during the tightening of the traction clamp, which could affect subsequent steps.

[0020] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are considered similar elements. The drawings do not constitute a scale limitation. In addition,

[0022] Figure 1 This is a front view of a traction clamp for PCCP pipe pressure tapping operations provided by an embodiment of the present disclosure;

[0023] Figure 2 1. A top view of a traction clamp for PCCP pipe pressure tapping operations provided by an embodiment of the present disclosure;

[0024] Figure 3 This is a construction status diagram of a traction clamp for PCCP pipe pressure tapping operation provided by an embodiment of the present disclosure;

[0025] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0026] Reference numerals:

[0027] 10: Reinforcement plate; 20: PCCP pipe; 21: Mortar protective layer; 22: Prestressed steel wire layer; 23: Steel cylinder layer; 24: Concrete layer; 30: Threaded cylinder; 40: Threaded rod; 50: Steel wire rope; 60: Alligator clip; 61: Pin; 62: First clamping arm; 63: Second clamping arm; 64: Spring; 65: Bolt; 66: Nut; 67: Clamping block; 68: Buckle body; 70: Hook; 80: Buckle; 90: Spacer; 100: Roller. DETAILED DESCRIPTION

[0028] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0029] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0031] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0032] Unless otherwise stated, the term "plurality" means two or more.

[0033] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0034] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0036] Combine Figures 1 to 4As shown, an embodiment of the present disclosure provides a traction clamp for hot-drilling PCCP pipes. This clamp is used during the welding of a reinforcement plate 10 to the prestressed steel wire at the opening of a PCCP pipe 20. The clamp includes a threaded barrel 30, a threaded rod 40, a wire rope 50, and an alligator clip 60. The threaded rod 40 is threaded onto each end of the threaded barrel 30. This threaded connection provides a self-locking function and facilitates adjustment. The wire ropes 50 are connected to the two threaded rods 40, each driven by the two threaded rods 40. The alligator clips 60 are connected to the two wire ropes 50, each clamping at two points on the prestressed steel wire to tighten the wire ropes 50 inward from those two clamped points. The reinforcement plate 10 is in contact with the prestressed steel wire and is pressed by the two wire ropes 50, thereby ensuring that the reinforcement plate 10 is securely attached to the prestressed steel wire. The threaded barrel 30 is controlled to rotate relative to the threaded rods 40 at both ends to tighten the two wire ropes 50.

[0037] The disclosed embodiments provide a traction clamp for hot-drilling PCCP pipes, used during the welding of a reinforcement plate 10 to the prestressed steel wire at the opening of a PCCP pipe 20. The PCCP comprises, from the inside out, a concrete layer 24, a steel cylinder layer 23, a prestressed steel wire layer 22, and a mortar protective layer 21. Before construction, the mortar protective layer 21 in the construction area is sanded off, exposing the prestressed steel wire at the opening. During construction, after placing the reinforcement plate 10 on the exposed prestressed steel wire surface, two alligator clips 60 are clamped onto two points on the prestressed steel wire, located outside the edges of the reinforcement plate 10. The threaded barrel 30 is then rotated, and the interaction between the threads changes the extension length of the two threaded rods 40, thereby tightening the two steel wire ropes 50. Once the two steel wire ropes 50 are tightened, the reinforcement plate 10 is tightly attached to the prestressed steel wire, allowing welding of the reinforcement plate 10 and the prestressed steel wire to proceed. At the same time, pre-tensioning the prestressed steel wires prevents sudden stress relaxation or loss during subsequent welding or drilling operations, potentially leading to pipe bursts and other accidents. This resolves the technical challenges of repairing PCCP pipes 20 during pressurized drilling. After welding is complete and the welds have cooled, the traction clamp can be removed. At this point, the prestressed steel wires remain beneath the reinforcement plate 10, allowing subsequent drilling operations to proceed. With the reinforcement plate 10 in place, sufficient prestressing force is maintained even if the underlying prestressed steel wires are severed.

[0038] Furthermore, after placing the reinforcing plate 10 on the exposed prestressed steel wire, the reinforcing plate 10 can be temporarily fixed by wrapping it with ropes, steel wires or elastic bands to determine the position of the reinforcing plate 10 and prevent it from moving during the tightening of the traction clamp, which would affect the subsequent steps.

[0039] Optionally, combined Figures 1 to 4As shown, each alligator clip 60 includes a latch 61, a first clamping arm 62, a second clamping arm 63, and a spring 64. The latch 61 supports and rotatably mounts the first and second clamping arms 62, 63. The first clamping arm 62 is rotatably mounted on a pin and can rotate relative to the pin. The first clamping arm 62 includes a first driving end and a first clamping end. The first driving end is used to drive the first clamping end to rotate about the pin. The second clamping arm 63 is rotatably mounted on the pin and arranged in a cross-section with the first clamping arm 62. It can also rotate relative to the pin. The second clamping arm 63 includes a second driving end and a second clamping end. The first driving end is used to drive the second clamping end to rotate about the pin. The second driving end is opposite the first driving end, and the second clamping end is opposite the first clamping end. When the second driving end and the first driving end are controlled, the second clamping end and the first clamping end can clamp the prestressed steel wire. The spring 64 is installed between the first and second driving ends to provide elastic force. Under the elastic force of the spring 64 , the first clamping end and the second clamping end have a tendency to move closer to each other.

[0040] In the disclosed embodiment, the elastic force of spring 64 causes the second driving end and the first driving end to move away from each other. This in turn causes the second clamping end and the first clamping end to move toward each other, thereby clamping the prestressed steel wire between the second clamping end and the first clamping end. Thus, the two alligator clips 60 can clamp two points on the prestressed steel wire located on either side of the reinforcing plate 10.

[0041] Optionally, combined Figures 1 to 4 As shown, each alligator clip 60 further includes a bolt 65 and a nut 66. The shank of the bolt 65 passes through the first clamping end and the second clamping end. The nut 66 is threadedly connected to the bolt 65. The first clamping end and the second clamping end are located between the nut 66 and the head of the bolt 65.

[0042] In the disclosed embodiment, each alligator clip 60 further includes a bolt 65 passing through the first clamping end and the second clamping end, and a nut 66 threadedly connected to the bolt 65. The bolt 65 and nut 66 are used to fasten the first clamping end and the second clamping end, so that the first clamping end and the second clamping end have sufficient clamping force to prevent slippage between the first clamping end and the second clamping end and the prestressed steel wire.

[0043] Optionally, combined Figures 1 to 4 As shown, each alligator clip 60 further includes a clamping block 67. The clamping blocks 67 are mounted on opposing surfaces of the first and second clamping ends, respectively. Both clamping blocks 67 include grooves whose shapes match the shape of the prestressed steel wire. When the alligator clip 60 clamps the prestressed steel wire, the prestressed steel wire is positioned within the two grooves.

[0044] In the disclosed embodiment, each alligator clip 60 further includes a clamping block 67 mounted on opposing surfaces of the first clamping end and the second clamping end, respectively. Both clamping blocks 67 include a groove shaped to match the prestressed steel wire. Both grooves are used to abut against the prestressed steel wire, increasing the contact area with the prestressed steel wire, thereby further improving the clamping effect on the prestressed steel wire.

[0045] Optionally, combined Figures 1 to 4 As shown, each alligator clip 60 further includes a buckle body 68. The buckle body 68 is sleeved on the latch 61 for being connected to the wire rope 50.

[0046] In the embodiment of the present disclosure, each alligator clip 60 further includes a buckle body 68 sleeved on the latch 61. The buckle body 68 is used to connect with the wire rope 50 to facilitate assembly and disassembly between the wire rope 50 and the alligator clip 60.

[0047] Optionally, combined Figures 1 to 4 As shown, it also includes a hook 70. The hook 70 is connected to the end of the two threaded rods 40 respectively, and is located outside the threaded barrel 30. The two hooks 70 are suspended on the two steel wire ropes 50 respectively.

[0048] In the embodiment of the present disclosure, hooks 70 are further included, each connected to the ends of the two threaded rods 40 and located outside the threaded barrel 30. The two hooks 70 are respectively suspended on the two steel wire ropes 50 to connect the threaded barrel 30 and the two threaded rods 40 between the two steel wire ropes 50.

[0049] Optionally, combined Figures 1 to 4 As shown, it also includes a buckle 80. The buckle 80 is respectively installed at the two ends of each steel wire rope 50. Wherein, under the tightening of the buckles 80 at both ends, the two ends of each steel wire rope 50 form a lifting ear.

[0050] In the embodiment of the present disclosure, it further includes buckles 80 respectively installed at both ends of each steel wire rope 50. The buckles 80 at both ends are used to form lifting ears at both ends of the steel wire rope 50 to facilitate connection and assembly with other components.

[0051] Optionally, combined Figures 1 to 3 As shown, the structure further includes a spacer 90. The spacer 90 is placed between the two steel cables 50 and the reinforcing plate 10 respectively.

[0052] The disclosed embodiment also includes spacers 90 placed between the two steel cables 50 and the reinforcement plate 10. Both spacers 90 serve to provide support and elevation, allowing for adjustment of the overall position of the traction clamp. This facilitates the clamp's two alligator clips 60 clamping the prestressed steel wires, the two steel cables 50 pressing against the reinforcement plate 10, and the adjustment of the clamp's threaded barrel 30.

[0053] Optionally, combined Figures 1 to 3 As shown, the roller 100 is further included. The rollers 100 are respectively installed on the two pads 90 and respectively abut against the two steel ropes 50.

[0054] In the embodiment of the present disclosure, rollers 100 are further included, each mounted on the two pads 90. The two rollers 100 are used to reduce the friction between the two steel ropes 50 and the two pads 90, thereby facilitating the tightening of the two steel ropes 50.

[0055] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A traction clamp for PCCP pipe hot tapping operation, used in the process of welding the reinforcement plate to the prestressed steel wire at the opening of the PCCP pipe, characterized in that: include: threaded barrel; A threaded rod, threadedly connected to both ends of the threaded barrel; Steel wire ropes, respectively connected to the two threaded rods; Alligator clips are connected to the two steel wire ropes, respectively, and the two alligator clips clamp two points of the prestressed steel wire respectively. The reinforcing plate is in contact with the prestressed steel wire and is pressed by the two steel wire ropes; The threaded barrel is controlled to rotate relative to the threaded rods at both ends to tighten the two steel ropes.

2. A traction clamp for PCCP pipe tapping operation according to claim 1, characterized in that: Each of the alligator clips includes: plug; A first clamping arm is rotatably mounted on the pin, wherein the first clamping arm includes a first driving end and a first clamping end; a second clamping arm rotatably mounted on the pin shaft and cross-distributed with the first clamping arm, the second clamping arm comprising a second driving end and a second clamping end, the second driving end being opposite to the first driving end, and the second clamping end being opposite to the first clamping end; a spring, installed between the first driving end and the second driving end, for providing elastic force; Wherein, under the elastic force of the spring, the first clamping end and the second clamping end have a movement tendency to approach each other.

3. A traction clamp for PCCP pipe pressure tapping operation according to claim 2, characterized in that: Each of the alligator clips further comprises: a bolt, wherein the shank of the bolt is passed through the first clamping end and the second clamping end; a nut, threadedly connected to the bolt; Wherein, the first clamping end and the second clamping end are located between the nut and the head of the bolt.

4. A traction clamp for PCCP pipe tapping operation according to claim 2, characterized in that: Each of the alligator clips further comprises: Clamping blocks are respectively mounted on opposite surfaces of the first clamping end and the second clamping end, and both clamping blocks include a groove, and the shapes of the two grooves match the shape of the prestressed steel wire; Wherein, when the alligator clip clamps the prestressed steel wire, the prestressed steel wire is located in the two grooves.

5. The traction clamp for PCCP pipe pressure tapping operation according to claim 2 is characterized in that: Each of the alligator clips further comprises: The buckle body is sleeved on the latch and is used to be connected to the steel wire rope.

6. A traction clamp for PCCP pipe tapping operation according to any one of claims 1 to 5, characterized in that: Also includes: The hooks are respectively connected to the ends of the two threaded rods and are both located outside the threaded barrel. The two hooks are respectively suspended on the two steel ropes.

7. A traction clamp for PCCP pipe tapping operation according to any one of claims 1 to 5, characterized in that: Also includes: Buckles are respectively installed at both ends of each of the steel wire ropes; Wherein, when the buckles at both ends are tightened, both ends of each steel wire rope form lifting ears.

8. A traction clamp for PCCP pipe tapping operation according to any one of claims 1 to 5, characterized in that: Also includes: The spacers are respectively placed between the two steel ropes and the reinforcing plates.

9. A traction clamp for PCCP pipe tapping operation according to claim 8, characterized in that: Also includes: The rollers are respectively installed on the two pads and respectively abut against the two steel ropes.

Images