Pipe wrench

Abstract

The utility model provides a pipeline pliers, including left jaw and right jaw, pivot, insert, left arm and right arm. Left jaw and right jaw form the accommodating cavity by intercoordination, the first end of left jaw and the first end of right jaw are rotatable around the pivot, the insert is detachably arranged at one end or both ends of the pivot to realize the fixation or dismounting of the pivot, left arm and right arm extend from the second end of left jaw and the second end of right jaw respectively to the direction away from the pivot, wherein, the first end and the second end of left jaw are oppositely arranged, and the first end and the second end of right jaw are oppositely arranged.

Description

Technical Field

[0001] This utility model relates to the field of pliers technology, and more specifically to a pipe wrench. Background Technology

[0002] PVC pipes and aluminum-plastic composite pipes, among others, are widely used in fluid transportation fields such as water, oil, and gas supply due to their excellent performance. During pipe installation, the connection between pipes is crucial, and the most common connection method currently is to use symmetrical joints, along with clamping pliers to press and fix deformable ring fasteners, thereby achieving a sealed connection between the pipe and the joint.

[0003] However, during pipeline installation, especially in space-constrained locations (such as inside suspended ceilings, equipment compartments, or narrow manholes), existing clamping pliers cannot be used in these scenarios. In particular, the fixed opening angle and method of the clamp heads cannot be flexibly adjusted according to site conditions, and these problems are even more pronounced for the connection of large-diameter pipes. Utility Model Content

[0004] In order to overcome at least one deficiency of the prior art, this utility model provides a pipe wrench that is suitable for operation in confined spaces.

[0005] To achieve the above objectives, this utility model provides a pipe wrench, including a left jaw and a right jaw, a pivot, a plug, a left jaw arm, and a right jaw arm. The left jaw and the right jaw cooperate to form a receiving cavity; the first end of the left jaw and the first end of the right jaw are both rotatably disposed around the pivot; the plug is detachably disposed at one or both ends of the pivot to fix or remove the pivot; the left jaw arm and the right jaw arm extend away from the pivot from the second end of the left jaw and the second end of the right jaw, respectively; wherein the first and second ends of the left jaw and the first and second ends of the right jaw are arranged opposite each other.

[0006] Optionally, in one embodiment, the plug is detachably mounted on one end of the pivot, and the other end of the pivot is an enlarged end. When the plug is engaged with the pivot, the plug and the enlarged end together restrict the axial movement of the pivot. In another embodiment, the other end of the pivot may not have an enlarged end for limiting movement; the limiting at both ends can be achieved directly by inserting the plug into both ends of the pivot.

[0007] Optionally, to facilitate the insertion of the plug-in, the pivot is provided with a limiting groove for cooperating with the plug-in.

[0008] Optionally, the plug-in includes a connecting operating part and a clamping part. The clamping part is used to mate with a limiting groove, and the operating part extends outward from one end of the clamping part. Since the clamping part mates with the limiting groove, which is parallel or approximately parallel to the radial section, it is difficult to operate without an additional clamping part. However, providing an outwardly extending operating part facilitates operation.

[0009] Optionally, the clamping part includes a left clamping arm and a right clamping arm that cooperate with each other. The middle part of the left clamping arm and the right clamping arm both protrude outward to cooperate with the limiting groove, which further facilitates the insertion of the plug.

[0010] Optionally, the portions of the left and right clamping arms near the operating part cooperate to form a neck, which is elastic. When subjected to external force, the neck deforms and provides a rebound force to the pivot, thus reinforcing the fixation effect.

[0011] Optionally, to facilitate the insertion of the plug, the portions of the left and right clamping arms that are further away from the operating part relative to the middle portion are tilted outwards.

[0012] Optionally, after the pivot is inserted into the left and right jaws to form a fit, the limiting groove is exposed in the left and right jaws for better limiting.

[0013] Optionally, the plug-in is integrally molded, with the left jaw head and left forearm being integrally formed, and the right jaw head and right forearm being integrally molded.

[0014] Optionally, the left and right jaws are each a mating semicircular ring. The semicircular holes of the two opposing semicircular rings fit together to form a receiving cavity.

[0015] Optionally, the first ends of the left and right jaws are toothed together along the axis of the pivot, or they may be described as interlocking.

[0016] Optionally, the pipe wrench also includes bolts that are connected to the left and right clamp arms respectively, for adjusting the distance or pressure between the left and right clamp arms, thereby adjusting the force applied to the pipe by the left and right clamp heads.

[0017] Optionally, the left and right clamp arms can be of equal or unequal length, for example, the left clamp arm can be shorter. The pipe wrench here is particularly suitable for the shorter clamp arm.

[0018] Optionally, the pipe wrench also includes a handle for connecting to the left and right jaw arms. Generally, the handle is connected to the longer jaw arms to facilitate the use of rotating the shorter handle in normal environments.

[0019] Traditional pipe wrenches require rotating the left and right arms around a pivot during use to create space for pipe insertion. However, since both arms have a certain length, the wrenches require an operating space much larger than the pipe's diameter. In this application, by detachably attaching inserts to one or both ends of the pivot for fixing or removing it, the left and right wrenches become two independent units. Without rotating the wrenches, they can be directly moved to enclose the pipe, and the pivot is then secured by the inserts. Therefore, the required operating space is only slightly larger than the pipe's diameter. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the pipe clamp provided in an embodiment of this utility model; Figure 2 This is a schematic diagram illustrating the use of the pipe wrench in a confined space according to an embodiment of this utility model; Figure 3 This is a schematic diagram of the pipe clamps after removing the bolts and the clamp handle, provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the pipe wrench after the handle has been removed during use in a confined space, provided by an embodiment of this utility model. Figure 5 This is a schematic diagram of the plug-in provided in an embodiment of this utility model; Figure 6 This is a schematic diagram of the pivot provided in an embodiment of this utility model. Detailed Implementation

[0021] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings.

[0022] Please refer to Figures 1 to 6 This embodiment provides a pipe wrench 100. It includes a left jaw 10 and a right jaw 20, a pivot 40, a plug 30, a left jaw arm 60, and a right jaw arm 50. The left and right jaws cooperate to form a receiving cavity 11; the first ends of both the left and right jaws are rotatably disposed around the pivot; the plug is detachably disposed at one or both ends of the pivot to fix or remove the pivot; the left and right jaw arms extend away from the pivot from the second ends of the left and right jaws, respectively; wherein the first and second ends of the left and right jaws are positioned opposite each other.

[0023] Traditional pipe wrenches, when used, such as Figure 1 and 4As shown, the clamp arm needs to be rotated along the direction of A2, therefore it needs to be increased in size (by an amount equal to the clamp's closed state) by at least L1. However, in this embodiment, if the pipe clamp is used in a confined space, the left and right clamp heads become two separate entities after the pivot can be removed via a plug, as shown. Figure 2 As shown, there is no need to rotate the clamp heads. Simply move the two clamp heads along the A1 direction to wrap around the pipe, and then fix the pivot with the plug. The required increase in size is 2L2. Obviously, 2L2 is approximately equal to the pipe diameter D1, and L1 = L2 + L3. Due to the design of the lever arm, the L3 of the pipe clamp is definitely much larger than or greater than L2. Even the shorter of the left and right clamp arms is much larger than or greater than L2. Therefore, the pipe clamp in this embodiment can greatly save the required operating space during use.

[0024] In normal working spaces, where space is not a concern, the pipe wrench in this embodiment can be used without removing the inserts to reduce operational difficulty. Therefore, the pipe wrench in this embodiment is not only suitable for confined spaces but also easy to operate in normal spaces.

[0025] In one embodiment, the plug is detachably disposed at one end of the pivot, and the other end of the pivot is an enlarged end 41. When the plug is inserted into the pivot, the plug and the enlarged end together restrict the axial movement of the pivot.

[0026] In one embodiment, the pivot is provided with a limiting groove 42 for cooperating with the plug-in.

[0027] In this embodiment, the plug-in includes a connected operating part 31 and a clamping part 32. The clamping part is used to engage with a limiting groove. The operating part extends outward from one end of the clamping part, with "outward" referring to the side away from the pipe wrench. The clamping part includes a left clamping arm and a right clamping arm that cooperate with each other. The middle portions 322 of both the left and right clamping arms protrude outward to engage with the limiting groove, where "outward" refers to the direction away from the pivot after the plug-in is inserted onto the pivot. The shape of the protrusion matches the shape of the pivot. The portions of the left and right clamping arms near the operating part cooperate to form a neck 321, which is elastic. The portions 323 of the left and right clamping arms that are further away from the operating part than the middle portions are both inclined outward, where "outward" refers to the direction away from the pivot after the plug-in is inserted onto the pivot.

[0028] In this embodiment, after the pivot is inserted into the left and right jaws to form a fit, the limiting groove is exposed in the left and right jaws.

[0029] In the embodiments, the plug-in is integrally formed, for example, it can be formed by bending a piece of iron wire or steel wire, and the connecting parts of the plug-in are all arc-shaped.

[0030] In this embodiment, the left and right jaws are mutually mating semicircular rings. The semicircular holes of the two opposing semicircular rings fit together to form a receiving cavity.

[0031] In this embodiment, the first ends of the left and right jaws are toothed together along the axis of the pivot. Specifically, the first end of the left jaw protrudes outward with spaced-apart first lugs 13, and correspondingly, the first end of the right jaw has spaced-apart second lugs 22. The first lugs 13 and the second lugs are interlocked. The pivot passes through the interlocking first and second lugs in sequence and then engages with the insert.

[0032] In this embodiment, the pipe wrench further includes bolts 70 connected to the left and right jaw arms respectively, for adjusting the distance or pressure between the left and right jaw arms, thereby adjusting the force applied to the pipe by the left and right jaw heads. One end of the bolt is rotatably disposed in the through hole 21 of the right forearm, and the left forearm is provided with a groove 12 to accommodate the other end of the bolt.

[0033] In this embodiment, the inner wall of the receiving cavity of the pipe wrench may be detachably connected with left fitting 14 and right fitting 23 of different sizes to accommodate pipes of different sizes.

[0034] In one embodiment, an indicator 90 is provided between the left and right forearms to indicate whether the crimping is in place. The indicator may be positioned closer to the pipe than the bolt.

[0035] In one embodiment, the pipe wrench further includes a handle 80 for connecting to the left and right clamp arms.

[0036] In this embodiment, the left and right clamp arms are of unequal length, with the left forearm being shorter.

[0037] The bolts, pliers handles, indicators, left and right fittings mentioned above can also be replaced with existing ones available on the market.

[0038] Those skilled in the art should understand that in the disclosure of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "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 utility model 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, the above terms should not be construed as a limitation on the utility model.

[0039] Although the present invention has been disclosed above by way of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of protection claimed in the claims.

Claims

1. A pipe wrench, characterized in that, include: The left and right jaws work together to form a receiving cavity; A pivot is provided, in which the first ends of the left jaw and the first ends of the right jaw are rotatably disposed about the pivot; A plug-in is detachably disposed at one or both ends of the pivot to enable the pivot to be fixed or detached; The left and right clamp arms extend away from the pivot from the second end of the left clamp head and the second end of the right clamp head, respectively. The first and second ends of the left jaw are positioned opposite each other, and the first and second ends of the right jaw are positioned opposite each other.

2. The pipe wrench according to claim 1, characterized in that, The plug is detachably disposed at one end of the pivot, and the other end of the pivot is an enlarged end. When the plug is inserted into the pivot, the plug and the enlarged end together restrict the axial movement of the pivot.

3. The pipe wrench according to claim 2, characterized in that, The pivot is provided with a limiting groove for cooperating with the plug-in.

4. The pipe wrench according to claim 3, characterized in that, The plug-in includes a connected operating part and a clamping part, the clamping part being used to cooperate with the limiting groove, and the operating part extending outward from one end of the clamping part.

5. The pipe wrench according to claim 4, characterized in that, The clamping part includes a left clamping arm and a right clamping arm that cooperate with each other, and the middle part of the left clamping arm and the right clamping arm both protrude outward to cooperate with the limiting groove.

6. The pipe wrench according to claim 5, characterized in that, The portions of the left and right clamping arms near the operating part cooperate to form a neck, and the neck is elastic.

7. The pipe wrench according to claim 6, characterized in that, The portions of the left and right clamping arms that are further away from the operating part relative to the middle portion are both inclined outwards.

8. The pipe wrench according to claim 3, characterized in that, After the pivot is inserted into the left and right jaws to form a fit, the limiting groove is exposed in the left and right jaws.

9. The pipe wrench according to claim 1, characterized in that, The plug is integrally formed, with the left jaw and left forearm integrally formed, and the right jaw and right forearm integrally formed. The left jaw and right jaw are respectively semi-circular rings that cooperate with each other, and the first end of the left jaw and the first end of the right jaw are toothed together along the axis of the pivot.

10. The pipe wrench according to claim 1, characterized in that, The pipe clamp also includes bolts that are respectively connected to the left clamp arm and the right clamp arm to adjust the distance or pressure of the left clamp arm and the right clamp arm, thereby adjusting the force applied to the pipe by the left clamp head and the right clamp head. The left clamp arm and the right clamp arm may be of equal or unequal length.

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