CN115535736A - Convenient electric power cable winding and unwinding devices who removes - Google Patents

Abstract

The application discloses a convenient mobile power cable retracting device, which includes a device main body, a driving device and a cable guide assembly; the inside of the device main body is installed with a cable retracting and releasing spool through the rotation of a pin shaft; the driving device is arranged on the device Outside the main body, the driving device is connected to the rotating shaft of the cable reel; the cable guiding assembly is installed on the front end of the device main body; Guide the cable during the wire process, change the angle of the cable, so that there is a certain space between the cable unwinding and the adjacent position, the unwinding is more convenient, and it can effectively protect the cable and clean the dust on the cable. It can reduce the workload of the operator, facilitate cable rewinding, and the use effect is good. It can quickly wind the cable on the cable take-up and pay-off drum. After use, there is no need to replace the cable take-up and pay-off drum. Rewind the cable Yes, it is more convenient to use and has a good prospect of use.

Description

A convenient mobile power cable retracting device

technical field

The invention belongs to the field of electric power engineering, in particular to a convenient mobile power cable retracting and unwinding device.

Background technique

Power cables are cables used to transmit and distribute electric energy. Power cables are often used in urban underground power grids, outgoing lines of power stations, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas.

In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the main line of the power system, including 1-500KV and above various voltage levels and various insulated power cables.

With the progress of society, people's requirements for points are constantly improving. In order to better transmit electricity, it is often necessary to erect cables. In order to facilitate the erection of cables, people have invented a power cable unwinding device.

However, after research, it is found that the power cable unwinding device has certain disadvantages in use;

In the existing power cable unwinding device, the cable barrel is placed on the frame, and the frame is lifted to the area where the cable needs to be erected during use, and then the cable is pulled to unwind the cable, so that the cable is scattered , and then set up the cables;

In the existing power cable unwinding device, the cable drum is usually replaced after the cable on the cable drum is unrolled. The cable drum is relatively large and very heavy. It is very troublesome to remove it from the cable drum, causing the power line It is very troublesome to use the cable retracting device;

The cable barrel of the existing power cable unwinding device is relatively wide, and the cable is wound relatively tightly. When unwinding and pulling the cable, it takes a lot of effort to pull the cable, which makes the unwinding of the cable more troublesome and does not meet people's needs. Use requirements, for this reason we have proposed a kind of power cable retractable device that is convenient to move.

Contents of the invention

In order to overcome the deficiencies of the prior art, this application provides a convenient mobile power cable retracting device of the present invention, which records the cable guide assembly, and the cable guide assembly is provided with a lateral adjustment assembly and a guide assembly. The horizontal adjustment component changes the position of the guide component. The guide component can guide the cable during the unwinding process and change the angle of the cable, so that there is a certain space between the cable unwinding and the adjacent position, and the unwinding is more convenient.

The technical scheme that this application implements and solves its technical problem adopts is:

A convenient mobile power cable retractable device, including a device main body, a driving device and a cable guide assembly;

The inside of the main body of the device is installed with a cable take-up and release spool through the rotation of the pin shaft;

The driving device is arranged outside the main body of the device, and the driving device is connected with the rotating shaft of the cable reel;

The cable guide assembly is installed on the front end of the device main body, and one end of the cable on the cable take-up and take-off barrel passes through the cable guide assembly;

Wherein, the cable guide assembly includes a guide frame body, the inner surface of the guide frame body is fixedly mounted with a lateral adjustment assembly, and the lateral adjustment assembly is provided with a guide assembly.

The four corners of the lower end face of the main body of the device are fixedly equipped with universal wheels, which can be easily moved; the universal wheels can also be replaced by electric rollers. When the electric rollers are used, the movement of the entire power cable retracting device is more convenient.

The universal wheel is provided with a foot brake structure, which can limit the position of the power cable retracting device and prevent it from shaking during use.

The present invention is a convenient mobile power cable retractable device, which records the cable guide assembly, the cable guide assembly is provided with a lateral adjustment assembly and a guide assembly, the lateral adjustment assembly changes the position of the guide assembly during use, and the guide assembly can Guide the cable during the unwinding process, and change the angle of the cable, so that there is a certain space between the unwinding and the adjacent position of the cable, and the unwinding is more convenient.

Preferably, the lateral adjustment assembly includes a screw drive assembly and a mounting base, the screw drive assembly is fixedly mounted on the inner top surface of the guide frame body, and the mounting base is fixedly connected to the moving seat on the screw drive assembly, The guide assembly is fixedly installed on the mounting seat.

The lead screw drive assembly can drive the installation seat to move laterally, so that the position of the guide assembly can be changed, so that the guide assembly can better guide the movement of the cable.

Preferably, the guide assembly includes a main body, a buffer assembly and a cleaning piece;

A guiding channel is opened on the front surface of the main body;

The buffer component is arranged inside the guide channel;

The cleaning element is arranged at the front end of the inner surface of the guide channel;

Wherein, the main body includes an inlet part, a middle part and an outlet part connected in sequence, and the shape of the inlet part and the outlet part are both truncated cones.

The setting of the buffer component can reduce the contact area between the guide channel and the cable, thereby reducing the abrasion of the cable.

Both the inlet part and the outlet part are in the shape of a truncated cone, which can facilitate the passage of the cable through the guide channel and is more convenient to use.

Preferably, the inner surface of the inlet part is provided with an annular groove, the cleaning member includes a sponge strip, the shape of the sponge strip is arc-shaped, and the number of the sponge strips is several groups, and several groups of the sponge strips are in turn The connection forms a ring, and the sponge strip is clamped inside the ring groove.

The setting of the sponge strip can remove the dust on the surface of the cable when the cable is reeled, reduce sundries, make the reel more tightly and rewind better.

Preferably, several sets of installation grooves are opened on the inner surface of the middle part close to both ends, and the buffer assembly includes several sets of buffer members, and the buffer members are fixedly installed inside the installation grooves.

Several sets of cushioning parts are matched so that the cable does not rub against the inner surface of the guiding channel when passing through the guiding channel, and the use effect is good.

Preferably, the buffer member includes an elastic member and a bump;

One end of the elastic member is fixedly connected to the bottom end of the installation groove;

The protrusion is fixedly connected with the other end of the elastic member.

When in use, the elastic member supports the protrusion, and the elastic force can play a buffering effect when the cable contacts the protrusion, reducing wear and tear.

The elastic member is preferably a spring, and shrapnel can also be used instead.

The present invention is a convenient mobile power cable retracting device, which records the guide assembly. The guide assembly is provided with buffer parts and cleaning parts. Friction with the inner surface of the guide channel can effectively protect the cable, and the setting of the cleaning part can clean the dust on the cable, which can reduce the workload of the operator, facilitate the winding of the cable, and has a good use effect.

Preferably, the driving assembly includes a manual driving assembly and an automatic driving assembly, and the manual driving assembly and the automatic driving assembly are respectively arranged at two ends of the main body of the device.

When in use, the cable can be unwound through the manual drive component and the automatic drive component, and the cable can be rewound through the automatic drive component.

Preferably, the manual drive assembly includes an adjustment handwheel, and the adjustment handwheel is installed at one end of the rotating shaft on the cable take-up and pay-off spool, and the automatic drive assembly includes a motor, which is fixedly installed on the main body of the device, The output shaft of the motor is fixedly connected with the other end of the rotating shaft.

Rotate and adjust the handwheel to realize the rotation of the cable take-up and take-off spool, and realize the unwinding. The motor mainly plays an auxiliary role in the cable take-up, which is convenient for the cable take-up.

Preferably, a cable clip is fixedly installed on the outer surface of the cable take-up and pay-off barrel close to one end, and the other end of the cable on the cable take-up and take-off barrel is connected to the cable take-up and take-off line through the cable clip. The cylinder is fixedly connected.

The present invention is a convenient mobile power cable retracting device, which records a cable clip, a drive assembly and a cable guide assembly. Components, the drive component can drive the cable take-up and pay-off spool to rotate, and with the guiding effect of the cable guide component, the cable can be quickly wound on the cable take-up and take-off spool, and there is no need to replace the cable take-up and take-off spool after use , just rewind the cable, which is more convenient to use.

Preferably, the cable clip includes an arc clip and a limiter;

The arc-shaped holder is fixedly installed on the outer surface of the cable take-up and pay-off barrel, and the interior of the arc-shaped holder is provided with a limited opening;

The limiting member is installed in the limiting opening inside the arc-shaped card seat through screw rotation;

Wherein, openings are opened on the limiter and the arc-shaped holder, the openings on the limiter and the arc-shaped holder are partially overlapped, and the inner surface of the limiter is provided with an arc-shaped limiter. card strip.

The opening on the limiter and the arc-shaped holder partially overlaps, the limiter is rotated, and the arc-shaped limiter bar moves into the opening on the limiter, reducing the cross-section of the opening, so that the cable can be realized. fixed.

In summary, the present invention includes at least one of the following beneficial technical effects:

One is a convenient mobile power cable retracting device of the present invention, which records the cable guide assembly, the cable guide assembly is provided with a lateral adjustment assembly and a guide assembly, and the lateral adjustment assembly changes the position of the guide assembly during use. The guiding component can guide the cable during the unwinding process, and change the angle of the cable, so that there is a certain space between the unwinding and the adjacent position of the cable, and the unwinding is more convenient.

The second is a convenient mobile power cable retracting device of the present invention, which records the guide assembly. The guide assembly is provided with a buffer and a cleaning member. When in use, the buffer can play a buffering effect, so that the cable passes through the guide The cable is not rubbed against the inner surface of the guiding channel during the passage, which can effectively protect the cable, and the setting of the cleaning part can clean the dust on the cable, which can reduce the workload of the operator, facilitate the winding of the cable, and has a good use effect.

Third, the present invention is a convenient mobile power cable retracting device, which records a cable clip, a drive assembly and a cable guide assembly, and the cable clip can limit the position of one end of the cable to avoid loosening of the cable , with the drive assembly, the drive assembly can drive the cable reel to rotate, and with the guiding effect of the cable guide assembly, the cable can be quickly wound on the cable reel, and there is no need to replace the cable reel after use. The wire reel can be used to rewind the cable, which is more convenient to use and has a good use prospect.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a partial structural diagram among the present invention;

Fig. 3 is an installation structure diagram of the cable guide assembly in the present invention;

Fig. 4 is a partial structural diagram of the cable guide assembly in the present invention;

Fig. 5 is a schematic structural view of a buffer in the present invention;

Fig. 6 is a schematic diagram of the local structure of the cable take-up and take-off barrel in the present invention;

Figure 7 is an enlarged view of the structure at A in Figure 6 of the present invention;

Fig. 8 is a structural diagram of the cable clip in the present invention.

Reference signs: 1. Device main body; 2. Cable take-up and release spool; 3. Guide frame body; 4. Mounting seat; 5. Main body; 6. Guide channel; 7. Annular groove; 8. Sponge bar; 9. Installation groove; 10, elastic piece; 11, bump; 12, adjustment handwheel; 13, motor; 14, cable clamp; 15, limit piece; 16, arc limit clip.

detailed description

The embodiment of the present application provides a convenient mobile power cable retracting and unwinding device, which solves the problem that the existing power cable unwinding device in the prior art usually replaces the cable drum after unwinding the cable on the cable drum, and the overall comparison of the cable drum Large and very heavy, it is very troublesome to remove it from the cable drum, which makes it very troublesome to use the power cable unwinding device; the cable drum of the existing power cable unwinding device is relatively wide, and the cable reel The winding is relatively tight, and when the cable is unrolled and pulled, it is laborious to pull the cable, which makes the unwinding of the cable more troublesome. The convenient mobile power cable retracting device of the present invention records the cable guide assembly, the cable guide The component is provided with a horizontal adjustment component and a guide component. When in use, the horizontal adjustment component changes the position of the guide component. The guide component can guide the cable during the unwinding process and change the angle of the cable so that the cable is in the unwinding and adjacent position. There is a certain amount of space, and it is more convenient to unwind.

Example 1:

A convenient mobile power cable retractable device, as shown in Figure 1-Figure 8, includes a device main body 1, a driving device and a cable guide assembly;

The inside of the main body 1 of the device is installed with a cable take-up and release spool 2 through the rotation of the pin shaft;

The driving device is arranged on the outside of the device main body 1, and the driving device is connected with the rotating shaft of the cable reel 2;

The cable guide assembly is installed on the front end of the device main body 1, and one end of the cable on the cable reel 2 passes through the cable guide assembly;

Wherein, the cable guide assembly includes a guide frame body 3, a lateral adjustment assembly is fixedly installed on the inner surface of the guide frame body 3, and a guide assembly is arranged on the lateral adjustment assembly.

The four corners of the lower end surface of the device main body 1 are fixedly equipped with universal wheels, which can be easily moved; the universal wheels can also be replaced by electric rollers.

The universal wheel is provided with a foot brake structure, which can limit the position of the power cable retracting device and prevent it from shaking during use.

The inner bottom surface of the device main body 1 is provided with a battery assembly, and the battery assembly supplies power for the entire power cable retracting device;

A controller is arranged inside the power cable retracting device, and a wireless module is integrated on the controller, which can realize remote wireless control of the power cable retracting device.

The present invention is a convenient mobile power cable retractable device, which records the cable guide assembly, the cable guide assembly is provided with a lateral adjustment assembly and a guide assembly, the lateral adjustment assembly changes the position of the guide assembly during use, and the guide assembly can Guide the cable during the unwinding process, and change the angle of the cable, so that there is a certain space between the unwinding and the adjacent position of the cable, and the unwinding is more convenient.

The lateral adjustment assembly includes a screw drive assembly and a mounting seat 4, the screw drive assembly is fixedly installed on the inner top surface of the guide frame body 3, the mounting seat 4 is fixedly connected with the moving seat on the lead screw drive assembly, and the guide assembly is fixedly installed on the installation Seat 4 on.

Example 2:

On the basis of Embodiment 1, as shown in Figures 1-8, this embodiment records the structure of the cable guide assembly;

The screw drive assembly can drive the mounting base 4 to move laterally, so that the position of the guide assembly can be changed, so that the guide assembly can better guide the movement of the cable.

The guide assembly includes a main body 5, a buffer assembly and a cleaning piece;

The front end of the main body 5 is provided with a guide channel 6;

The buffer assembly is arranged inside the guide channel 6;

The cleaning piece is arranged at the front end of the inner surface of the guide channel 6;

Wherein, the main body 5 includes an inlet part, a middle part and an outlet part connected in sequence, and the shapes of the inlet part and the outlet part are both frustum-shaped.

The screw drive assembly can also adopt existing lateral movement structures such as electric push rods.

The arrangement of the buffer assembly can reduce the contact area between the guide channel 6 and the cable, thereby reducing the abrasion of the cable.

Both the inlet part and the outlet part are in the shape of a truncated cone, which can facilitate the passage of cables through the guide channel 6 and is more convenient to use.

The inner surface of the inlet part is provided with an annular groove 7, and the cleaning parts include a sponge strip 8. The shape of the sponge strip 8 is arc-shaped, and the number of the sponge strips 8 is several groups. Connected to the inside of the annular groove 7.

The setting of the sponge strip 8 can remove the dust on the surface of the cable when the cable is reeled, reduce sundries, make the reeling more compact, and the reeling is better.

The inner surface of the middle part is provided with several sets of installation grooves 9 near both ends, and the buffer assembly includes several sets of buffer pieces, which are fixedly installed inside the installation grooves 9 .

Several groups of cushioning parts are matched so that the cable does not rub against the inner surface of the guiding channel 6 when passing through the guiding channel 6, and the use effect is good.

The buffer member includes an elastic member 10 and a bump 11;

One end of the elastic member 10 is fixedly connected with the bottom end of the mounting groove 9;

The bump 11 is fixedly connected with the other end of the elastic member 10 .

When in use, the elastic member 10 supports the protrusion 11, and when the cable contacts the protrusion 11, the elastic force can play a buffering effect and reduce wear.

The elastic member 10 is preferably a spring, and can also be replaced by a shrapnel, which mainly plays the role of supporting the protrusion 11 by adopting an elastic structure.

The present invention is a convenient mobile power cable retracting device, which records a guide assembly, a buffer and a cleaning member are set in the guide assembly, and the buffer can play a buffering effect during use, so that when the cable passes through the guide channel 6 It does not rub against the inner surface of the guide channel 6, which can effectively protect the cable, and the setting of the cleaning part can clean the dust on the cable, which can reduce the workload of the operator, facilitate the winding of the cable, and has a good use effect.

Example 3:

On the basis of Embodiment 2, as shown in Figures 1-8, this embodiment records the structure of other components in the power cable retracting device;

The driving assembly includes a manual driving assembly and an automatic driving assembly, and the manual driving assembly and the automatic driving assembly are respectively arranged at two ends of the device main body 1 .

When in use, the cable can be unwound through the manual drive component and the automatic drive component, and the cable can be rewound through the automatic drive component.

The manual drive assembly includes an adjustment handwheel 12, and the adjustment handwheel 12 is installed on one end of the rotating shaft on the cable reel 2. The automatic drive assembly includes a motor 13, which is fixedly installed on the device main body 1, and the output shaft of the motor 13 It is fixedly connected with the other end of the rotating shaft.

Rotate and adjust the handwheel 12 to realize the rotation of the cable take-up and pay-off spool 2 to realize unwinding, and the motor 13 mainly plays an auxiliary effect when the cable is rewound, so as to facilitate the rewinding of the cable.

The outer surface of the cable take-up and pay-off barrel 2 is fixedly installed with a cable clip 14 near one end, and the other end of the cable on the cable take-off and take-off barrel 2 is fixed with the cable take-off and take-off barrel 2 through the cable clip 14 connect.

The present invention is a convenient mobile power cable retracting device, which records a cable clamp 14, a drive component and a cable guide component, the cable clamp 14 can limit the position of one end of the cable to avoid loosening of the cable, Cooperate with the drive assembly, the drive assembly can drive the cable reel 2 to rotate, and cooperate with the guiding effect of the cable guide assembly, the cable can be quickly wound on the cable reel 2, and there is no need to replace the cable after use Rewinding and rewinding the wire spool 2 is enough to rewind the cable, which is convenient to use.

The cable clip 14 includes an arc clip and a stopper 15;

The arc-shaped deck is fixedly installed on the outer surface of the cable take-up and pay-off spool 2, and the inside of the arc-shaped deck is provided with a limited opening;

The limiting member 15 is installed in the limiting opening inside the arc-shaped holder by threaded rotation;

The limiting member 15 realizes limiting by threads.

The outer surface of the limiting member 15 is provided with several groups of convex lines, which can increase the frictional force and facilitate the rotation of the limiting member 15 by the staff.

Wherein, openings are provided on the limiter 15 and the arc-shaped holder, the openings on the limiter 15 and the arc-shaped holder are partially overlapped, and the inner surface of the limiter 15 is provided with an arc-shaped limit clip 16 .

The openings on the limiter 15 and the arc-shaped holder partially overlap, and the limiter 15 is rotated, and the arc-shaped limiter bar 16 moves into the opening on the limiter 15, reducing the cross-section of the opening, and clamping cable, so that the fixing of the cable can be realized.

It should be noted that the present invention is a convenient mobile power cable retractable device. When in use, move the power cable retractable device to the area where the cable needs to be erected, and pull the cable so that one end of the cable Pass through the guide channel 6, start the screw drive assembly when in use, the screw drive assembly drives the mounting seat 4 to move, and the mounting seat 4 moves to one end, so that the cables are separated and will not be tightly attached;

At this time, the staff can directly pull the cable;

The motor 13 can also be started, and the motor 13 drives the cable reel 2 to unwind, and the cable is pulled while loosening, which is more labor-saving;

It is also possible for two staff members to cooperate, wherein one staff member pulls the cable, and the other group of staff members rotates the adjustment handwheel 12 to cooperate with each other, which is more convenient to use;

When the cable is placed for a long time, the motor 13 can be started, and the motor 13 drives the cable reel 2 to rotate in reverse to rewind the redundant cable, which is more convenient to use;

When the cables are all used up, move the power cable retracting device to the cable production or cable storage area, insert one end of the cable into the opening on the cable clip 14, and then turn the stopper 15, Make the arc-shaped limit clip 16 rotate, and the arc-shaped limit clip 16 contacts the cable, thereby limiting the position of the cable, and then start the screw drive assembly and the motor 13, and the motor 13 drives the cable to take in and out the spool 2 Reverse to rewind the cable;

During the cable winding process, the screw drive assembly drives the mounting seat 4 to move, so that the cables are tightly wound successively, and the winding effect is good.

Finally, it should be noted that obviously, the above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims (10)

1. The utility model provides a convenient electric power cable winding and unwinding devices who removes which characterized in that includes:

the cable winding and unwinding device comprises a device main body (1), wherein a cable winding and unwinding barrel (2) is rotatably mounted in the device main body through a pin shaft;

the driving device is arranged outside the device main body (1) and is connected with a rotating shaft of the cable take-up and pay-off drum (2);

the cable guide assembly is mounted at the front end of the device main body (1), and one end of a cable on the cable take-up and pay-off drum (2) penetrates through the cable guide assembly;

the cable guide assembly comprises a guide frame body (3), a transverse adjusting assembly is fixedly mounted on the inner surface of the guide frame body (3), and a guide assembly is arranged on the transverse adjusting assembly.

2. A portable power cable reel as recited in claim 1, wherein: the transverse adjusting assembly comprises a lead screw transmission assembly and a mounting seat (4), the lead screw transmission assembly is fixedly mounted on the inner top surface of the guide frame body (3), the mounting seat (4) is fixedly connected with the moving seat on the lead screw transmission assembly, and the guide assembly is fixedly mounted on the mounting seat (4).

3. A portable power cable reel as recited in claim 2, wherein: the guide assembly includes:

a main body (5) with a guide channel (6) on the front end surface;

a buffer assembly disposed inside the guide channel (6);

a cleaning member provided at a front position of an inner surface of the guide passage (6);

the main body (5) comprises an inlet part, a middle part and an outlet part which are communicated in sequence, and the inlet part and the outlet part are both in a circular truncated cone shape.

4. A portable power cable reel as recited in claim 3, wherein: annular groove (7) have been seted up to the internal surface of import portion, the cleaning member includes sponge strip (8), the shape of sponge strip (8) is the arc, the quantity of sponge strip (8) is a plurality of groups, a plurality of groups sponge strip (8) connect gradually and constitute the annular, sponge strip (8) joint is in the inside of annular groove (7).

5. A portable power cable reel as recited in claim 4, wherein: the internal surface of intermediate part is close to both ends position and has all seted up a plurality of groups mounting groove (9), the buffering subassembly includes a plurality of groups bolster, bolster fixed mounting is in the inside of mounting groove (9).

6. A portable power cable reel as recited in claim 5, wherein: the buffer member includes:

one end of the elastic piece (10) is fixedly connected with the bottom end of the mounting groove (9);

the bump (11), the bump (11) is fixedly connected with the other end of the elastic piece (10).

7. The portable electric power cable winding and unwinding device according to claim 1, wherein the driving assembly comprises a manual driving assembly and an automatic driving assembly, and the manual driving assembly and the automatic driving assembly are respectively disposed at two end positions of the device body (1).

8. A portable power cord retraction apparatus as claimed in claim 7 wherein: the manual drive subassembly includes adjusting hand wheel (12), the one end of axis of rotation is installed on cable pay-off reel (2) in adjusting hand wheel (12), the automatic drive subassembly includes motor (13), motor (13) fixed mounting is on device main part (1), the output shaft of motor (13) and the other end fixed connection of axis of rotation.

9. The conveniently-moved electric power cable winding and unwinding device according to claim 1, wherein a cable clamping piece (14) is fixedly mounted on the outer surface of the cable winding and unwinding drum (2) at a position close to one end, and the other end of the cable on the cable winding and unwinding drum (2) is fixedly connected with the cable winding and unwinding drum (2) through the cable clamping piece (14).

10. A portable power cable reeling device according to claim 9 wherein the cable catch (14) comprises:

the arc-shaped clamping seat is fixedly arranged on the outer surface of the cable take-up and pay-off drum (2), and a limiting opening is formed in the arc-shaped clamping seat;

the limiting piece (15), the limiting piece (15) is installed in the limiting opening in the arc-shaped clamping seat through the thread rotation;

openings are formed in the limiting part (15) and the arc-shaped clamping seat, the openings on the limiting part (15) and the arc-shaped clamping seat are partially overlapped, and an arc-shaped limiting clamping strip (16) is arranged on the inner surface of the limiting part (15).

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