CN114393602A

CN114393602A - Gripping tool

Info

Publication number: CN114393602A
Application number: CN202210137254.2A
Authority: CN
Inventors: 梁承才; 苗雨升; 王浩; 张桥
Original assignee: Shandong Nuclear Power Co Ltd
Current assignee: Shandong Nuclear Power Co Ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-04-26
Anticipated expiration: 2042-02-15
Also published as: CN114393602B

Abstract

The invention relates to the technical field of nuclear factory maintenance, and particularly discloses a gripping tool, wherein a support frame is arranged in a shell; the clamping assembly comprises a first clamping jaw and a second clamping jaw, the first clamping jaw and the second clamping jaw are hinged, and the clamping end of the first clamping jaw and the clamping end of the second clamping jaw are provided with a clamping position close to each other and a separation position far away from each other. The first clamping jaw is fixedly connected with the rotating shaft, and the rotating shaft is rotatably arranged on the supporting frame. The rotation adjusting assembly is used for adjusting the rotation of the rotating shaft. Above-mentioned setting makes the exposed core of first clamping jaw and second clamping jaw be close to or when keeping away from, and first clamping jaw is motionless relative to the shell, and then can be rotatory through the whole centre gripping subassembly of rotation control of rotation axis to accomplish the adjustment of foreign matter direction, and at the rotation axis rotation process, shell and support frame do not all take place to rotate, make the removal of snatching tool in the gap of heat-transfer pipe not influenced, can follow and snatch out the foreign matter smoothly in the gap of heat-transfer pipe.

Description

Gripping tool

Technical Field

The invention relates to the technical field of nuclear factory maintenance, in particular to a gripping tool.

Background

The steam generator of nuclear power plant is the indirect heating equipment who produces the required steam of steam turbine, and steam generator's heat transfer is used the heat-transfer pipe, receives operational environment's influence, often has the foreign matter to drop to the gap between the heat-transfer pipe, and the foreign matter can produce vibration under the rivers effect, leads to the fact wearing and tearing to the heat-transfer pipe, and then causes the threat to nuclear power unit's a loop pressure boundary.

Therefore, the foreign bodies need to be taken out by using a clamping tool, the shapes of some foreign bodies are special, the foreign bodies need to be clamped and taken out from the gaps of the heat transfer pipe only by rotating at a certain angle, but the gaps of the heat transfer pipe are generally very small and are only a few millimeters, and common tools cannot rotate in narrow gaps due to structural problems, so that the foreign bodies are difficult to take out.

Disclosure of Invention

The invention aims to provide a gripping tool to solve the problem that foreign matters cannot be taken out.

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

the present invention provides a gripping tool, comprising:

a housing;

the supporting frame is arranged in the shell;

the clamping assembly comprises a first clamping jaw and a second clamping jaw, the first clamping jaw and the second clamping jaw are hinged, and a clamping end of the first clamping jaw and a clamping end of the second clamping jaw are provided with a clamping position close to each other and a separation position far away from each other;

the first clamping jaw is fixedly connected with the rotating shaft, and the rotating shaft is rotatably arranged on the supporting frame;

a rotation adjustment assembly for adjusting rotation of the rotation shaft.

As a preferred scheme of the gripping tool, the rotation adjusting assembly comprises a sliding block, the sliding block is arranged on the support frame in a sliding manner along the axial direction of the rotating shaft, and a convex block is arranged on the sliding block; the rotating shaft is provided with a sliding groove, the sliding groove is wound in the circumferential direction of the rotating shaft along the direction away from the first clamping jaw, and the protruding block is slidably arranged in the sliding groove.

As a preferable scheme of the gripping tool, the rotation adjusting assembly further includes a first rope and a second rope, the support frame is provided with a first channel and a second channel, the first rope is connected to the first end of the sliding block through the first channel, the second rope is connected to the second end of the sliding block through the second channel, and the first end and the second end are arranged oppositely.

As a preferred aspect of the grasping tool, the grasping tool further includes a locking assembly for securing the first cord and the second cord relative to the housing.

As a preferable scheme of the gripping tool, the support frame is provided with a rotating groove, and the two ends of the support frame, which are positioned on the rotating groove, are provided with limiting parts; two annular limiting grooves are formed in two ends of the rotating shaft; the rotating shaft penetrates through the rotating groove, and the two limiting parts are respectively positioned in the two annular limiting grooves.

As a preferable aspect of the gripping tool, the clamping assembly further includes an elastic member, and the elastic member is disposed between the first clamping jaw and the second clamping jaw, and is configured to stop the clamping end of the first clamping jaw and the clamping end of the second clamping jaw at the separated position.

As a grabbing tool's preferred scheme, the centre gripping subassembly still includes the centre gripping rope, centre gripping rope one end is fixed in the operation end of second clamping jaw, the inside of first clamping jaw is equipped with first through-hole, the opening orientation of the one end of first through-hole the operation end, the inside of rotation axis is equipped with the second through-hole, the centre gripping rope passes first through-hole with the second through-hole, the pulling the centre gripping rope, can drive the tip of second clamping jaw is close to the tip of first clamping jaw.

As a preferable scheme of the gripping tool, the clamping end of the first clamping jaw is provided with an inclined surface, and the inclined surface is inclined to the second clamping jaw along the direction close to the second clamping jaw.

As an optimal scheme of the gripping tool, a first clamping groove is formed in the clamping end of the first clamping jaw, a second clamping groove is formed in the clamping end of the second clamping jaw, and when the clamping end of the first clamping jaw and the clamping end of the second clamping jaw are located at the clamping position, the first clamping groove and the second clamping groove are surrounded to form a clamping position.

As a preferable scheme of the gripping tool, the outer shell comprises a first shell and a second shell, and the first shell and the second shell are both formed by pressing steel strips.

The invention has the beneficial effects that:

the invention provides a gripping tool which comprises a shell, a supporting frame, a clamping assembly, a rotating shaft and a rotation adjusting assembly. Wherein, the supporting frame is arranged in the shell; the clamping assembly comprises a first clamping jaw and a second clamping jaw, the first clamping jaw is fixedly connected with the rotating shaft, the rotating shaft is rotatably arranged on the support frame, the first clamping jaw is hinged with the second clamping jaw, and the first clamping jaw and the second clamping jaw are provided with a clamping position close to each other and a separation position away from each other. The rotation adjusting assembly is used for adjusting the rotation of the rotating shaft. Above-mentioned setting makes the exposed core of first clamping jaw and second clamping jaw be close to or when keeping away from, and first clamping jaw is motionless relative to the shell, and then can be rotatory through the whole centre gripping subassembly of rotation control of rotation axis to accomplish the adjustment of foreign matter direction, and at the rotation axis rotation process, shell and support frame do not all take place to rotate, make the removal of snatching tool in the gap of heat-transfer pipe not influenced, can follow and snatch out the foreign matter smoothly in the gap of heat-transfer pipe.

Drawings

FIG. 1 is a schematic view of a grasping tool according to an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of the grasping tool according to the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a support frame according to an embodiment of the present invention;

FIG. 4 is a partial cross-sectional view of a clamping assembly in an embodiment of the invention;

FIG. 5 is a schematic structural diagram of a first housing according to an embodiment of the invention;

FIG. 6 is a schematic side view of the first and second housings in an embodiment of the invention;

FIG. 7 is a schematic structural view of a connecting sheet according to an embodiment of the present invention;

FIG. 8 is a left side view of the connecting sheet according to the embodiment of the present invention;

fig. 9 is a schematic structural view of the connecting sheet after being bent twice in the embodiment of the invention.

In the figure:

1. a housing; 11. a first housing; 12. a second housing; 13. connecting sheets; 131. long sheets; 132. a plug-in sheet;

2. a support frame; 21. a first channel; 22. a second channel; 23. a rotating groove; 24. a limiting part; 25. a sliding groove;

3. a clamping assembly; 31. a first jaw; 32. a second jaw; 33. a torsion spring; 34. clamping the rope;

4. a rotating shaft; 41. a chute;

5. a rotation adjustment assembly; 51. a slider; 511. a bump; 52. a first rope; 53. a second rope;

6. a camera assembly; 7. a lighting assembly;

8. a locking assembly; 81. a locking frame; 811. a first locking screw hole; 812. a second locking screw hole; 813. and a third locking screw hole.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Example one

As shown in fig. 1 to 9, the present embodiment provides a gripping tool, which includes a housing 1, a support frame 2, a gripping assembly 3, a rotation shaft 4, and a rotation adjusting assembly 5. Wherein, the supporting frame 2 is arranged in the shell 1; the clamping assembly 3 comprises a first clamping jaw 31 and a second clamping jaw 32, the first clamping jaw 31 and the second clamping jaw 32 are hinged, and a clamping end of the first clamping jaw 31 and a clamping end of the second clamping jaw 32 are provided with a mutually close clamping position and a mutually far separating position. The first jaw 31 is fixed to the rotary shaft 4, and the rotary shaft 4 is rotatably provided to the support frame 2. The rotation adjusting assembly 5 is used for adjusting the rotation of the rotating shaft 4, and then drives the whole clamping assembly 3 to rotate.

In this embodiment, when the clamping ends of the first clamping jaw 31 and the second clamping jaw 32 are close to or far away from each other, the first clamping jaw 31 is fixed relative to the shell 1, and then the whole clamping assembly 3 can be controlled to rotate through the rotation of the rotating shaft 4, so as to adjust the direction of the foreign matters, and in the rotating process of the rotating shaft 4, the shell 1 and the support frame 2 do not rotate, so that the movement of the gripping tool in the gap of the heat transfer pipe is not affected, and the foreign matters can be smoothly gripped from the gap of the heat transfer pipe.

Because the width of the gap between the heat transfer pipes is small, and is only a few millimeters, in this embodiment, the thickness of the casing 1 is 3mm, the space in the casing 1 is narrower, and in order to adapt to the structure that the casing 1 is thinner, in this embodiment, optionally, the rotation adjusting assembly 5 includes a sliding block 51, the sliding block 51 is slidably disposed on the support frame 2 along the axial direction of the rotating shaft 4, and the sliding block 51 is provided with a projection 511; the rotating shaft 4 is provided with a sliding groove 41, the sliding groove 41 is arranged around the rotating shaft 4 along the direction away from the first clamping jaw 31, the sliding groove 41 is S-shaped, and the lug 511 is arranged in the sliding groove 41 in a sliding manner. When the slide block 51 slides, the protrusion 511 engages with the side wall of the slide slot 41 to drive the rotation shaft 4 to rotate. The sliding block 51 is also a block-shaped steel plate, and has a simple structure and low production cost.

Alternatively, the support frame 2 is provided with a slide groove 25, and the slide block 51 slides in the slide groove 25. This arrangement can reduce the overall thickness of the support frame 2 and the slide block 51. Further, the sliding groove 25 can run through the support frame 2, the bottom of the support frame 2 is provided with a strip-shaped hole communicated with the sliding groove 25, the bump 511 is matched with the sliding groove 41 after passing through the strip-shaped hole, and the whole thickness of the grabbing tool is further reduced by the arrangement. Furthermore, one end of the bump 511 is provided with a stud, the bottom of the sliding block 51 is provided with a screw hole, and the bump 511 and the sliding block 51 are screwed with the screw hole through the stud. This arrangement facilitates the mounting of the slide block 51 in the slide groove 25 of the support frame 2, so that the slide block 51 can slide in the slide groove 25 without being separated from the support frame 2.

In order to reduce the cost, regarding the structure of the rotation adjustment assembly 5, the rotation adjustment assembly 5 further includes a first rope 52 and a second rope 53, the support frame 2 is provided with a first passage 21 and a second passage 22, the first rope 52 is connected to a first end of the sliding block 51 through the first passage 21, the second rope 53 is connected to a second end of the sliding block 51 through the second passage 22, and the first end and the second end are opposite. The above arrangement enables the first and

second cords

52, 53 to be arranged in the same plane, reducing the thickness of the rotary adjustment assembly 5 to accommodate gaps of smaller width. Pulling the first cable 52 can move the sliding block 51 to the left, thereby driving the rotating shaft 4 to rotate in a forward direction, and pulling the second cable 53 can move the sliding block 51 to the right, thereby driving the rotating shaft 4 to rotate in a reverse direction, wherein the first channel 21 passes above the sliding block 51 and winds around one end of the sliding block 51 close to the clamping assembly 3; the second channel 22 is located at the end of the slide block 51 remote from the clamping assembly 3.

In the embodiment, the rotation operation of the rotating shaft 4 can be realized by the traction action of the two ropes, the structure is ingenious, and the cost is low. Most importantly, the first and

second ropes

52 and 53 can be bent, and the sliding block 51 can be driven by the first and

second ropes

52 and 53 when the housing 1 is bent.

Further, the rotation adjusting assembly 5 further includes a first spring and a second spring, both the first spring and the second spring are disposed in the sliding groove 25, the first spring is located at one end of the sliding block 51 close to the clamping assembly 3, the second spring is located at one end of the sliding block 51 far from the clamping assembly 3, the arrangement is such that the sliding block 51 is at an intermediate position under the condition that the sliding block is not pulled by the first rope 52 and the second rope 53, at this time, the rotating shaft 4 is at an initial position, and in this state, the first clamping jaw 31 is located right below the second clamping jaw 32, so as to facilitate clamping of foreign objects.

Further, the first cord 52 passes through the first spring, and the second cord 53 passes through the second spring. This arrangement makes the positions of the first spring and the second spring not to be displaced. Optionally, a handle is attached to each of the free ends of the first and

second cords

52, 53 to facilitate manual pulling. Wherein, first rope 52 and second rope 53 are the steel wire, and the diameter is 1 mm.

Optionally, the support frame 2 is provided with a rotating groove 23, and both ends of the support frame 2, which are located at the rotating groove 23, are provided with limiting parts 24; two annular limiting grooves are formed in two ends of the rotating shaft 4; the rotating shaft 4 is inserted into the rotating groove 23, and the two limiting portions 24 are respectively located in the two annular limiting grooves. This setting can realize the spacing to rotation axis 4, avoids rotation axis 4 to follow self axis drunkenness. The limiting parts 24 are two limiting blocks which are oppositely arranged and are positioned in the annular limiting groove.

In order to improve the operation efficiency, in this embodiment, the clamping assembly 3 further includes an elastic member, which is disposed between the first clamping jaw 31 and the second clamping jaw 32, and is used for stopping the clamping end of the first clamping jaw 31 and the clamping end of the second clamping jaw 32 at the separated position. This setting can improve the clamp efficiency of getting the foreign matter. The elastic member may be a torsion spring 33, the torsion spring 33 is rotatably disposed on the first clamping jaw 31, and two ends of the torsion spring 33 respectively abut against the operation end of the first clamping jaw 31 and the operation end of the second clamping jaw 32.

Optionally, the clamping assembly 3 further includes a clamping rope 34, one end of the clamping rope 34 is fixed to the operating end of the second clamping jaw 32, a first through hole is formed in the first clamping jaw 31, an opening at one end of the first through hole faces the operating end from top to bottom, a second through hole is formed in the rotating shaft 4, the clamping rope 34 penetrates through the first through hole and the second through hole, and the clamping rope 34 is pulled to drive the clamping end of the second clamping jaw 32 to be close to the clamping end of the first clamping jaw 31. The arrangement enables the clamping end of the first jaw 31 and the clamping end of the second jaw 32 to be switched between the clamping position and the separated position by the cooperation of the clamping rope 34 and the elastic member, and is low in manufacturing and maintenance cost. Optionally, a handle is attached to the free end of the clamping cord 34 to facilitate manual pulling. The clamping rope 34 is a steel wire with a diameter of 1 mm.

In this embodiment, the clamping end of the first jaw 31 is preferably provided with a bevel that is inclined to the second jaw 32 in a direction closer to the second jaw 32. This arrangement allows the gripping assembly 3 to advance so as to lift and move foreign objects from the ground between the first jaw 31 and the second jaw 32.

Preferably, the clamping end of the first clamping jaw 31 is provided with a first clamping groove, the clamping end of the second clamping jaw 32 is provided with a second clamping groove, and when the clamping end of the first clamping jaw 31 and the clamping end of the second clamping jaw 32 are located at the clamping position, the first clamping groove and the second clamping groove are surrounded to form a clamping position. The clamping foreign matter of being convenient for on the one hand of setting up of first centre gripping groove and second centre gripping groove improves the stability of centre gripping, and the other party can also reduce the maximum width between first clamping jaw 31 and the second clamping jaw 32 behind the centre gripping foreign matter, can also remove at narrow and small space after being convenient for rotate.

In this embodiment, optionally, the housing 1 includes a first housing 11 and a second housing 12, the first housing 11 and the second housing 12 are formed by pressing a steel strip, the first housing 11 and the second housing 12 are buckled to form an installation cavity, and the support frame 2 is disposed in the installation cavity. The steel strip is of a material that allows the housing 1 to bend to some extent. Regarding the connection of the first housing 11 and the second housing 12, in the present embodiment, it may be screwed, snapped, or welded. In view of the production cost and the requirements of later use, the connection is made by a connecting piece 13 in the embodiment. Specifically, both sides of the first housing 11 and the second housing 12 are provided with connecting holes, and the connecting sheet 13 passes through the connecting hole on the upper side of the first housing 11 and the connecting hole on the upper side of the second housing 12 and then is bent twice to connect the upper side of the first housing 11 and the upper side of the second housing 12. The connecting piece 13 is bent after passing through the connecting hole at the lower side of the first housing 11 and the connecting hole at the lower side of the second housing 12 to connect the lower side of the first housing 11 and the lower side of the second housing 12.

Alternatively, a plurality of connection holes are provided at intervals on the upper side of the first housing 11, and a plurality of connection holes are provided at intervals on the upper side of the second housing 12; the connecting piece 13 includes a long piece 131 and a plurality of inserting pieces 132 connected to one side of the long piece 131, the plurality of inserting pieces 132 are respectively inserted into the connecting holes on the upper sides of the plurality of first housings 11 and then bent, and then the long piece 131 is bent and the long piece 131 is pressed on the outer sides of all the inserting pieces 132. A plurality of connection holes are formed at intervals in the lower side of the first housing 11, a plurality of connection holes are formed at intervals in the lower side of the second housing 12, and the connection piece 13 connects the lower side of the first housing 11 and the lower side of the second housing 12 by the above-mentioned method. The arrangement improves the assembly efficiency on one hand; in the second aspect, the hooking of the insertion piece 132 to the foreign object can be avoided.

The gripping tool further comprises an illuminating assembly 7 and a camera shooting assembly 6, the illuminating assembly 7 and the camera shooting assembly 6 are both arranged at one end, close to the clamping assembly 3, of the support frame 2, the illuminating assembly 7 is used for illuminating the working environment, and the camera shooting assembly 6 is used for shooting pictures of the working environment. Wherein, the cables related to the lighting assembly 7 and the camera assembly 6 pass through the cable channel of the support frame 2 and are arranged to the other end of the casing 1 through the inside of the casing 1 so as to be connected with the power supply equipment. A spring sleeve is laid in the cable channel, and the cable penetrates through the spring sleeve. Optionally, there are a plurality of spring sleeves, and the plurality of spring sleeves are connected in series to penetrate through the whole support frame 2. In this embodiment, optionally, the supporting frame 2 includes a first bracket and a second bracket that are connected to each other, the second bracket made of rubber is provided with a cable slot, and the spring is sleeved in the cable slot. And the second support is equipped with first mounting groove and second mounting groove, and lighting component 7 and camera shooting component 6 joint respectively in first mounting groove and second mounting groove.

The grasping tool further includes a locking assembly 8, the locking assembly 8 being configured to secure the first cord 52, the second cord 53, and the clamping cord 34 relative to the housing 1. Specifically, the locking assembly 8 comprises a locking frame 81, a first locking bolt, a second locking bolt and a third locking bolt, the locking frame 81 is fixed to the housing 1, the locking frame 81 is provided with a first locking channel, a second locking channel and a third locking channel, the locking frame 81 is further provided with a first locking screw hole 811 penetrating the first locking channel, a second locking screw hole 812 penetrating the second locking channel and a third locking screw hole 813 penetrating the third locking channel; the first cord 52 passes out of the first locking channel, the second cord 53 passes out of the second locking channel, and the clamping cord 34 passes out of the third locking channel; the first locking bolt is in threaded fit with the first locking screw hole 811 and can press the first rope 52 against the side wall of the first locking passage; the second locking bolt is in threaded fit with the second locking screw hole 812 and can press the second rope 53 to the side wall of the second locking channel; the third locking bolt is in threaded engagement with the third locking screw hole 813 and is capable of pressing the clamping cord 34 against the side wall of the third locking channel. This setting can realize that centre gripping subassembly 3 keeps the angle after the rotation, and then is favorable to taking out the foreign matter.

Example two

The gripping tool of this embodiment, the gripping tool structure in embodiment one is basically the same, the difference lies in, in this embodiment, the length of shell 1 is 3m-10m, preferably 6m, thickness is 3mm, highly is 20mm, and wholly is the belt structure, certain degree elastic deformation can take place, support frame 2 and locking subassembly 8 are located the both ends of shell 1 respectively, gripping tool still includes first tractive rope, the one end of first tractive rope is fixed in the one end that shell 1 is close to clamping component 3, and be located one side of shell 1, through pulling first tractive rope, can make shell 1 take place the bending of certain radian to the left, and then make clamping component 3 can press from both sides the foreign matter at wider range. Specifically, a fixing ring is disposed at one end of the housing 1 close to the clamping component 3, and the first pulling rope is tied in the fixing ring. Optionally, the grasping tool further includes a second pulling rope, one end of which is fixed to one end of the housing 1 close to the holding assembly 3 and is located on the other side of the housing 1, so as to realize the rightward bending of the housing 1. This arrangement further enlarges the range in which the gripping assembly 3 grips foreign matter.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A grasping tool, comprising:

a housing (1);

the support frame (2) is arranged in the shell (1);

the clamping assembly (3) comprises a first clamping jaw (31) and a second clamping jaw (32), the first clamping jaw (31) and the second clamping jaw (32) are hinged, and a clamping end of the first clamping jaw (31) and a clamping end of the second clamping jaw (32) are provided with a clamping position close to each other and a separation position far away from each other;

the rotating shaft (4), the first clamping jaw (31) is fixedly connected with the rotating shaft (4), and the rotating shaft (4) is rotatably arranged on the supporting frame (2);

a rotation adjustment assembly (5), the rotation adjustment assembly (5) being used for adjusting the rotation of the rotation shaft (4).

2. The gripping tool according to claim 1, wherein the rotation adjusting assembly (5) comprises a sliding block (51), the sliding block (51) is slidably arranged on the support frame (2) along the axial direction of the rotating shaft (4), and a bump (511) is arranged on the sliding block (51); the rotating shaft (4) is provided with a sliding groove (41), the sliding groove (41) is arranged in the circumferential direction of the rotating shaft (4) in a winding mode along the direction away from the first clamping jaw (31), and the protruding block (511) is arranged in the sliding groove (41) in a sliding mode.

3. The gripping tool according to claim 2, wherein the rotation adjustment assembly (5) further comprises a first cable (52) and a second cable (53), the support frame (2) being provided with a first channel (21) and a second channel (22), the first cable (52) being connected to a first end of the sliding block (51) through the first channel (21), the second cable (53) being connected to a second end of the sliding block (51) through the second channel (22), the first end and the second end being oppositely disposed.

4. The grasping tool according to claim 3, characterized in that the grasping tool further comprises a locking assembly (8), the locking assembly (8) being configured to fix the first cord (52) and the second cord (53) relative to the housing (1).

5. The gripping tool as claimed in claim 1, wherein the support frame (2) is provided with a rotation groove (23), and both ends of the support frame (2) located in the rotation groove (23) are provided with a limiting part (24); two annular limiting grooves are formed in two ends of the rotating shaft (4); the rotating shaft (4) penetrates through the rotating groove (23), and the two limiting parts (24) are respectively positioned in the two annular limiting grooves.

6. The gripping tool according to claim 1, wherein the gripping assembly (3) further comprises a resilient member provided between the first jaw (31) and the second jaw (32) for stopping the gripping end of the first jaw (31) and the gripping end of the second jaw (32) in the disengaged position.

7. The gripping tool according to claim 6, wherein the gripping assembly (3) further comprises a gripping rope (34), one end of the gripping rope (34) is fixed to the operating end of the second jaw (32), a first through hole is formed in the first jaw (31), one end of the first through hole is opened towards the operating end, a second through hole is formed in the rotating shaft (4), the gripping rope (34) passes through the first through hole and the second through hole, and the gripping rope (34) is pulled to drive the gripping end of the second jaw (32) to be close to the gripping end of the first jaw (31).

8. The gripping tool according to claim 1, characterized in that the gripping end of the first jaw (31) is provided with a bevel, which is inclined to the second jaw (32) in a direction close to the second jaw (32).

9. The gripping tool according to claim 1, wherein the gripping end of the first jaw (31) is provided with a first gripping groove, the gripping end of the second jaw (32) is provided with a second gripping groove, and when the gripping end of the first jaw (31) and the gripping end of the second jaw (32) are in the gripping position, the first gripping groove and the second gripping groove enclose a gripping position.

10. The gripping tool according to any of the claims 1-9, characterized in that the outer shell (1) comprises a first shell (11) and a second shell (12), the first shell (11) and the second shell (12) being pressed from a steel strip.