Locking pliers for clamping cylindrical workpiece

Abstract

The locking pliers comprise a pliers body, two semicircular arc-shaped clamping plates are arranged between two pliers heads of the pliers body, connecting sleeves are fixed to the sides, away from each other, of the two arc-shaped clamping plates, and fixing assemblies are fixed to the inner sides of the two pliers heads of the pliers body. The connecting sleeve can be fixedly connected to the surface of the fixing assembly in a sleeving mode. The forceps body and the two arc-shaped clamping plates are arranged, the connecting sleeve is fixed to the arc top of each arc-shaped clamping plate, the fixing assembly is arranged on the forceps head of the forceps body, the arc-shaped clamping plates can be fixed to the forceps head of the forceps body through rapid clamping connection of the connecting sleeves and the fixing assemblies, and the two arc-shaped clamping plates can be driven to be close to each other by pinching the forceps body; and therefore, the two arc-shaped clamping plates are used for clamping the annular hoops on the cylindrical workpieces, and the two cylindrical workpieces can be clamped conveniently. And after the two arc-shaped clamping plates are detached, the plier body can be used as normal locking pliers, so that the application range of the locking pliers is wider.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas well technology, and in particular to a heavy-duty clamp for holding cylindrical workpieces. Background Technology

[0002] A bolt cutter is a hand tool primarily used for clamping, securing, or twisting objects, especially in situations requiring significant clamping force. It provides powerful clamping force through leverage, accommodates workpieces of varying sizes, and is suitable for diverse operational needs. A bolt cutter consists of a jaw, handles, and an adjusting screw. The jaw is typically serrated to enhance clamping force. The long handles provide leverage. The adjusting screw adjusts the jaw opening. Bolt cutters are a multi-functional hand tool characterized by strong clamping power and adjustable jaws, widely used in mechanical repair, metalworking, and other fields.

[0003] When assembling round pipes for oil and gas wells, a circular clamp is needed to connect two round pipes. When the circular clamp is fitted at the connection of two cylindrical pipe fittings, it is difficult to drive one cylindrical pipe fitting into the other. It is necessary to squeeze the circular clamp to drive one cylindrical pipe fitting into the other. However, since the circular clamp has a certain rigidity, squeezing the circular clamp is difficult. Therefore, this utility model improves the existing bolt clamp to adapt to the current use of round pipe assembly in oil and gas wells. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a heavy-duty clamp for holding cylindrical workpieces.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a clamping pliers for holding cylindrical workpieces, comprising a plier body, two semi-circular arc-shaped clamping plates provided between the two clamping heads of the plier body, a connecting sleeve fixed on the side of each of the two arc-shaped clamping plates that is far apart from each other, a fixing component fixed on the inner side of each of the two clamping heads of the plier body, the connecting sleeve being fixedly sleeved on the surface of the fixing component, and the connecting sleeve and the fixing component being detachably connected.

[0006] Furthermore, the connecting sleeve has a locking hole on its side wall, and the fixing component includes a connecting block fixed to the pliers head of the pliers body. The connecting sleeve is sleeved on the surface of the connecting block. The connecting block has a groove on the side near the locking hole. A spring is fixedly connected to the inner side wall of the groove, and a locking tooth is fixedly connected to the other end of the spring. The end of the locking tooth away from the spring is locked into the locking hole.

[0007] Furthermore, the end of the locking tooth away from the spring and the side closer to the arc-shaped clamping plate is designed with a bevel.

[0008] The beneficial effects of this utility model are:

[0009] In use, this utility model relates to a type of bolt clamping pliers for holding cylindrical workpieces. It comprises a clamping body and two arc-shaped clamping plates. A connecting sleeve is fixed to the apex of each arc-shaped clamping plate. The clamping head of the clamping body is equipped with a fixing component. The arc-shaped clamping plates can be quickly secured to the clamping head of the clamping body by quickly engaging the connecting sleeve with the fixing component. By squeezing the clamping body, the two arc-shaped clamping plates can be brought together, thereby clamping the annular band on the cylindrical workpiece and facilitating the clamping of two cylindrical workpieces. After removing the two arc-shaped clamping plates, the clamping body can be used as a normal bolt clamp, thus broadening the application range of this bolt clamp. Attached Figure Description

[0010] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 : Overall schematic diagram of this utility model;

[0012] Figure 2 : A three-dimensional view of the arc-shaped clamp of this utility model;

[0013] Figure 3 The present utility model Figure 1 Enlarged view of point A in the middle.

[0014] The attached figures are labeled as follows:

[0015] 1. Clamp body; 2. Arc-shaped clamp; 3. Connecting sleeve; 31. Clamping hole; 4. Fixing component; 41. Connecting block; 42. Groove; 43. Spring; 44. Clamping teeth. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1-3 As shown, a type of clamping pliers for holding cylindrical workpieces is disclosed. The pliers include a plier body 1, with two semi-circular arc-shaped clamping plates 2 between the two clamping heads of the plier body 1. A connecting sleeve 3 is fixed to the side of each of the two arc-shaped clamping plates 2 that is far apart from each other. A fixing component 4 is fixed to the inner side of each of the two clamping heads of the pliers body 1. The connecting sleeve 3 can be fixedly sleeved on the surface of the fixing component 4, and the connecting sleeve 3 and the fixing component 4 are detachably connected.

[0018] The connecting sleeve 3 has a locking hole 31 on its side wall. The fixing component 4 includes a connecting block 41 fixed to the head of the clamp body 1. The connecting sleeve 3 is sleeved on the surface of the connecting block 41. The connecting block 41 has a groove 42 on the side near the locking hole 31. A spring 43 is fixedly connected to the inner side wall of the groove 42, and a locking tooth 44 is fixedly connected to the other end of the spring 43. The end of the locking tooth 44 away from the spring 43 is inserted into the locking hole 31.

[0019] When the connecting sleeve 3 is fitted onto the surface of the connecting block 41, the locking teeth 44 are aligned with the locking holes 31. At this time, the spring 43 will squeeze the locking teeth 44, causing the locking teeth 44 to engage in the locking holes 31, thereby achieving a fixed connection between the connecting sleeve 3 and the connecting block 41. This allows the arc-shaped clamp 2 to be fixed on the jaws of the clamp body 1. When the handle of the clamp body 1 is squeezed, the arc-shaped clamp 2 will move.

[0020] The end of the locking tooth 44 away from the spring 43 and the side closer to the arc-shaped clamp 2 is designed with a slope.

[0021] The beveled design of the tooth 44 makes it easier for the connecting sleeve 3 to mate with the connecting block 41.

[0022] Working principle: When installing the arc-shaped clamp 2, the connecting sleeve 3 on the arc-shaped clamp 2 is directly fitted onto the surface of the corresponding connecting block 41. During fitting, it is important to ensure that the locking hole 31 on the connecting sleeve 3 and the locking tooth 44 on the connecting block 41 are on the same side. During the fitting process, the inclined surface of the locking tooth 44 will be squeezed by the connecting sleeve 3, causing the connecting sleeve 3 to retract into the groove 42. When the locking tooth 44 and the locking hole 31 coincide, the spring 43 will squeeze the locking tooth 44 into the locking hole 31, thus completing the installation of the arc-shaped clamp 2. When using this assembled pliers for connecting cylindrical pipe fittings in oil and gas wells, the two arc-shaped clamps 2 are clamped onto the surface of the circular hoop. Then, the handle of the pliers body 1 is squeezed, causing the two arc-shaped clamps 2 to press against the circular hoop. After the circular hoop is compressed and reduced in size, one of the cylindrical pipe fittings can be tapped to engage with the other cylindrical pipe fitting. When needed, the locking teeth 44 can be squeezed back into the groove 42, so that the locking teeth 44 are separated from the locking hole 31, and the connecting sleeve 3 can be removed from the surface of the connecting block 41, thereby realizing the disassembly of the arc-shaped clamp 2.

[0023] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pair of heavy-duty pliers for clamping cylindrical workpieces, comprising a plier body (1), characterized in that: Two semi-circular arc-shaped clamps (2) are provided between the two jaws of the clamp body (1). A connecting sleeve (3) is fixed on the side of the two arc-shaped clamps (2) that are far apart from each other. A fixing component (4) is fixed on the inner side of the two jaws of the clamp body (1). The connecting sleeve (3) can be fixedly sleeved on the surface of the fixing component (4), and the connecting sleeve (3) and the fixing component (4) are detachably connected.

2. The bolt clamp for clamping cylindrical workpieces according to claim 1, characterized in that: The connecting sleeve (3) has a locking hole (31) on its side wall. The fixing component (4) includes a connecting block (41) fixed to the head of the clamp body (1). The connecting sleeve (3) is sleeved on the surface of the connecting block (41). The connecting block (41) has a groove (42) on the side near the locking hole (31). A spring (43) is fixedly connected to the inner side wall of the groove (42), and a locking tooth (44) is fixedly connected to the other end of the spring (43). The end of the locking tooth (44) away from the spring (43) is inserted into the locking hole (31).

3. The bolt clamp for clamping cylindrical workpieces according to claim 2, characterized in that: The tooth (44) is designed with a sloping surface on the side away from the spring (43) and close to the arc-shaped clamp (2).

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