阅读说明：本技术 一种管子钳 (Pipe wrench ) 是由 王伟 李锋 于 2021-07-07 设计创作，主要内容包括：本发明公开了一种管子钳,涉及管子钳技术领域；包括把手、位于把手一端的第一钳口、相对第一钳口的第二钳口,所述第二钳口通过调节装置可活动连接在把手一端,所述调节装置用以调节第二钳口和第一钳口的间距；所述第一钳口和第二钳口分别铰接有活动夹持件,通过活动夹持件实现把手和管子之间不同的夹角。在使用的时候,管子位于两个活动夹持件之间,然后转动调节螺母,两个活动夹持件靠拢,把管子夹住,活动夹持件根据管子的角度转动,活动夹持件和管子之间面接触,夹持牢固性好。(The invention discloses a pipe wrench, and relates to the technical field of pipe wrenches; the adjustable jaw mechanism comprises a handle, a first jaw and a second jaw, wherein the first jaw is positioned at one end of the handle, the second jaw is opposite to the first jaw, the second jaw is movably connected to one end of the handle through an adjusting device, and the adjusting device is used for adjusting the distance between the second jaw and the first jaw; the first jaw and the second jaw are respectively hinged with a movable clamping piece, and different included angles between the handle and the pipe are realized through the movable clamping pieces. When the pipe clamping device is used, the pipe is located between the two movable clamping pieces, then the adjusting nut is rotated, the two movable clamping pieces are closed to clamp the pipe, the movable clamping pieces rotate according to the angle of the pipe, the movable clamping pieces and the pipe are in surface contact, and clamping firmness is good.)

1. The utility model provides a pipe wrench, includes the handle body, first keep silent, the second is kept silent, first keep silent and be located handle body one end, the handle body is close to the one end that first keeps silent and is equipped with the hole, the second is kept silent and is extended to pass the hole, but through adjusting device swing joint in the handle body, first keep silent and second keep silent and form the centre gripping mouth between keeping silent, be equipped with preloading device on the handle body, preloading device provides the pretightning force when first keep silent and second keep silent the centre gripping object, its characterized in that, first keep silent is equipped with first clamping jaw, second keep silent and is equipped with the second clamping jaw, have on the clamping jaw can with a plurality of teeth that the centre gripping object contacted, realize different angles between handle body and the pipe through first clamping jaw and second clamping jaw.

2. A pipe wrench according to claim 1, wherein said first jaw is fixedly connected to said first jaw, and said second jaw is fixedly connected to said second jaw.

3. A pipe wrench according to claim 2, wherein the contact surfaces of the first jaw and the second jaw with the pipe are cambered surfaces.

4. A pipe wrench according to claim 2, wherein the first jaw, the second jaw and the pipe contact surface are provided with multiple planes, and at least two planes of the multiple planes of the first jaw and the second jaw are not in the same extension plane.

5. A pipe wrench according to claim 1, wherein the first jaw and the second jaw are collectively referred to as jaws and the first jaw and the second jaw are collectively referred to as jaws, at least one jaw being pivotally connected to the respective jaw.

6. A pipe wrench according to claim 5, wherein said first jaw is fixedly connected to said first jaw, and said second jaw is rotatably connected to said second jaw;

alternatively, the first and second electrodes may be,

the first jaw is rotatably connected with the first clamping jaw, and the second jaw is fixedly connected with the second clamping jaw;

the contact surface of the clamping jaw fixedly connected with the jaw and used for clamping the pipe is an arc surface.

7. A pipe wrench according to claim 5, wherein said first jaw is pivotally connected to said first jaw, and said second jaw is pivotally connected to said second jaw.

8. A pipe wrench according to claim 7, wherein the first jaw and the second jaw are provided with receiving slots for receiving the clamping jaws, the clamping jaws are located in the corresponding receiving slots, the clamping jaws are provided with rotating shafts, the rotating shafts are rotatably connected with the clamping jaws, and both ends of the rotating shafts are in interference fit with the inner walls of the receiving slots.

9. A pipe wrench as claimed in claim 1, wherein said adjustment means is an adjustment nut; the second jaw extension is at least partially a screw;

the handle body is provided with a limit groove for preventing the adjusting nut from moving along the screw rod;

the screw rod passes through the hole, adjusting nut is located the spacing inslot.

10. A pipe wrench as claimed in claim 9, wherein the pretensioning means comprises a washer located in the bore, a spring for applying a force to the washer towards the screw.

Technical Field

The invention belongs to the technical field of pipe tongs, and particularly relates to a pipe tong with an adjustable clamping angle.

Background

When the pipeline needs to be installed and maintained, the pipe clamp needs to clamp and rotate the pipe.

The clamping angle of the existing pipe wrench, such as the pipe wrench structure in US2680369A (to which the pretensioning device of the present invention is introduced), is not adjustable, and can only clamp a pipe perpendicular to the shank; however, in reality, some pipes are located in a narrow space, so as to avoid obstacles, the pipes cannot be vertically clamped, and the traditional pipe tongs cannot clamp the pipes.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a pipe wrench with an adjustable clamping angle, which can clamp a pipe with an included angle smaller than 90 degrees with a handle body in a narrow space to realize narrow space operation.

The utility model provides a pipe wrench, includes the handle body, first keeps silent, the second is kept silent, first keeping silent is located handle body one end, the handle body is close to the one end that first keeps silent and is equipped with the hole, the second is kept silent and is extended to pass the hole, but through adjusting device swing joint in the handle body, first keep silent and the second keep silent between form the centre gripping mouth, be equipped with preloading device on the handle body, preloading device provides the pretightning force when first keep silent and second keep silent the centre gripping object, first keep silent and be equipped with first clamping jaw, second keep silent and be equipped with the second clamping jaw, have on the clamping jaw can with a plurality of teeth of centre gripping object contact, realize different angles between handle body and the pipe through first clamping jaw and second clamping jaw.

Preferably, the first jaw is fixedly connected with the first clamping jaw, and the second jaw is fixedly connected with the second clamping jaw.

Preferably, the contact surfaces of the first clamping jaw and the second clamping jaw and the pipe are cambered surfaces.

Preferably, the contact surfaces of the first clamping jaw and the second clamping jaw with the pipe are provided with a plurality of sections of planes, and at least two planes of the plurality of sections of planes of the first clamping jaw and the second clamping jaw are not in the same extension plane.

Preferably, the first jaw and the second jaw are collectively referred to as jaws, and at least one jaw is rotatably connected to the corresponding jaw.

Preferably, the first jaw is fixedly connected with the first clamping jaw, and the second jaw is rotatably connected with the second clamping jaw; or the first jaw is rotationally connected with the first clamping jaw, and the second jaw is fixedly connected with the second clamping jaw; the contact surface of the clamping jaw fixedly connected with the jaw and used for clamping the pipe is an arc surface.

Preferably, the first jaw is rotatably connected to the first jaw, and the second jaw is rotatably connected to the second jaw.

As preferred, all be equipped with the holding tank that is used for holding the clamping jaw on first keeping silent and the second is kept silent, the clamping jaw is located the holding tank that corresponds, the clamping jaw all is equipped with the pivot, pivot and clamping jaw rotate to be connected, the inner wall interference fit of pivot both ends and holding tank.

Preferably, the adjusting device is an adjusting nut; the second jaw extension is at least partially a screw; the handle body is provided with a limit groove for preventing the adjusting nut from moving along the screw rod; the screw rod passes through the hole, adjusting nut is located the spacing inslot.

Preferably, the pretensioning device comprises a washer located in the bore, a spring for applying a force to the washer towards the screw.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention has the beneficial effects that: in order to avoid obstacles, a pipe is knocked into the space between the two clamping jaws, the pipe is clamped, the clamping jaws rotate according to the angle of the pipe, the pipe with the included angle smaller than 90 degrees with the handle body can be clamped in a narrow space, and operation in the narrow space is achieved.

Drawings

FIG. 1 is a schematic view of example 1;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic view of the clamping of the tube in embodiment 1;

FIG. 5 is a side view of the tube clamping of embodiment 1;

FIG. 6 is a sectional view of the clamped tube of embodiment 1;

FIG. 7 is a sectional view of the tube clamped in embodiment 2;

FIG. 8 is a sectional view of the tube clamped in embodiment 4;

FIG. 9 is a sectional view of the tube clamped in embodiment 3.

In the figure: the clamping device comprises a handle body 1, a first jaw 2, a second jaw 3, a hole 4, a first clamping jaw 5, a second clamping jaw 6, a screw 7, a limiting groove 8, an adjusting nut 9, a gasket 10, a spring 11, a rotating shaft 12, a barrier 20 and a pipe 21.

Detailed Description

The invention is explained in further detail below with reference to the figures and the detailed description:

example 1:

referring to fig. 1 to 6, a pipe wrench comprises a handle body 1, a first jaw 2 and a second jaw 3, wherein the first jaw is positioned at one end of the handle body, a hole 4 is formed at one end of the handle body close to the first jaw, the second jaw extends through the hole and is movably connected to the handle body through an adjusting device, a clamping opening is formed between the first jaw and the second jaw, a pre-tightening device is arranged on the handle body and provides pre-tightening force when the first jaw and the second jaw clamp an object, the first jaw is provided with a first clamping jaw 5, the second jaw is provided with a second clamping jaw 6, the clamping jaws are provided with a plurality of teeth capable of contacting with the clamped object, and different angles between the handle body and a pipe are realized through the first clamping jaw and the second clamping jaw;

the adjusting device is an adjusting nut 9; the second jaw extension is at least partially a screw 7;

the handle body is provided with a limit groove 8 for preventing the adjusting nut from moving along the screw rod;

the screw rod penetrates through the hole, and the adjusting nut is positioned in the limiting groove;

the pretensioning device comprises a gasket 10 positioned in the hole, a spring 11 for applying a force to the gasket towards the screw, and the pretensioning device of the present embodiment refers to the prior patent US 2680369A;

the first jaw and the second jaw are collectively referred to as jaws, and at least one jaw is rotatably connected to the corresponding jaw. The first clamping jaw is rotatably connected with the first jaw, and the second clamping jaw is rotatably connected with the second jaw. First keep silent and the second is kept silent and is all equipped with the holding tank that is used for holding the clamping jaw, the clamping jaw is located the holding tank that corresponds, the clamping jaw all is equipped with pivot 12, pivot and clamping jaw rotate to be connected, the inner wall interference fit of pivot both ends and holding tank.

Principle of embodiment:

in a narrow space, the angle of the tube is different. The traditional pipe wrench can only firmly clamp the pipe vertical to the handle body. The tube with the included angle less than 90 degrees with the handle body can not be firmly clamped.

In use, in order to avoid the obstacle 20, the pipe 21 is clamped by knocking the pipe into between the two clamping jaws, and the clamping jaws rotate according to the angle of the pipe, so that the pipe with an included angle smaller than 90 degrees with the handle body can be clamped in a narrow space to realize narrow space operation, and the included angle between the handle body and the pipe is shown as alpha in the figure 4.

Example 2:

this example is substantially the same as example 1 except that:

referring to fig. 7, the first jaw is fixedly connected with the first clamping jaw, and the second jaw is fixedly connected with the second clamping jaw. The contact surfaces of the first clamping jaw and the second clamping jaw with the pipe are cambered surfaces.

Example 3:

this embodiment is substantially the same as embodiment 2 except that:

referring to fig. 9, the contact surfaces of the first clamping jaw and the second clamping jaw with the pipe are provided with a plurality of sections of planes, and at least two planes of the plurality of sections of planes of the first clamping jaw and the second clamping jaw are not in the same extension plane.

Example 4:

this example is substantially the same as example 1 except that:

referring to fig. 8, the first jaw is fixedly connected with the first clamping jaw, and the second jaw is rotatably connected with the second clamping jaw; or the first jaw is rotationally connected with the first clamping jaw, and the second jaw is fixedly connected with the second clamping jaw; the contact surface of the clamping jaw fixedly connected with the jaw and used for clamping the pipe is an arc surface.