CN218294858U

CN218294858U - Joint device with better sealing performance for fire-fighting belt

Info

Publication number: CN218294858U
Application number: CN202222981667.7U
Authority: CN
Inventors: 黄泽君
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-01-13
Anticipated expiration: 2032-11-09

Abstract

The utility model discloses a joint device with better sealing performance for a fire hose, which relates to the technical field of fire fighting equipment and comprises two adaptive connectors, wherein the connectors are provided with connecting pipes, female buckles adaptive to the connectors are provided with clamping plates, the clamping plates are provided with limiting holes, the connectors are provided with bosses, and the bosses are movably arranged in the limiting holes; the connecting pipe is sleeved with a partition board, and a plurality of fixing rods are movably mounted on the partition board. It should be noted that, in the utility model, through the arrangement of the structures such as the snap-gauge, the boss and the movable plate, the two metal connectors can be mutually clamped, so that the metal connectors can be rapidly clamped; set up the spring on through the fly leaf, set up the closing plate on the spring, strengthen the leakproofness between hosepipe and the connecting pipe in the time of the chucking fire hose of being convenient for, can also be in the quick joint of the fire hose of different models to the fire control connecting pipe on in addition to can practice thrift the time of fighting a fire, alleviate the harm of conflagration to people.

Description

Joint device with better sealing performance for fire fighting belt

Technical Field

The utility model relates to a fire-fighting equipment technical field especially relates to a fire-fighting takes piecing devices with preferred leakproofness.

Background

Fire hose is a hose used to transport high pressure water or fire-retardant liquids such as foam. The traditional fire hose takes rubber as a lining, and the outer surface of the traditional fire hose is wrapped by linen fabric; the advanced fire hose is made of polyurethane and other polymer materials, metal joints are arranged at two ends of the fire hose, and the fire hose can be connected with another hose to prolong the distance or connected with a nozzle to increase the liquid injection pressure.

Among the prior art, the metal joint of fire hose generally all is divided into pin thread and box, and the connected mode generally divide into two kinds: one is rotary connection, the male buckle is placed in the female buckle to abut against a rubber gasket in the female buckle, and then the male buckle and the female buckle can be tightly connected through strong threaded connection; the other is that the male buckle is plugged into the female buckle to hear the clicking sound, namely the connection is closed, but in a fire scene, the burning objects and other fire fighting people can make sounds, so that professional training is not available, and one person is difficult to independently successfully connect.

Furthermore, strangers in the two connection modes waste time and labor when using the novel connecting device, and a large amount of water resources are wasted due to the fact that the connection is not tightly closed, and the desired effect cannot be achieved. In addition, in the prior art, the fire hose and the metal joint are generally bound and fixed through a metal binding belt, and the button of the metal binding belt needs to be screwed by using an adaptive screwdriver during installation, so that the phenomenon that water flows out to corrode the metal binding belt during use due to a gap and the metal binding belt is very troublesome to replace due to the fact that the gap exists is avoided; when the metal binding belt is detached, a special screwdriver is needed to take down the metal binding belt, and if the binding is not tight, water pressure is raised instantly or a water belt is folded partially carelessly, water leakage or separation and falling of the water belt and a metal joint are easy to occur during use, water flow is reduced instantly, rescue time is delayed, and therefore personal safety and property loss of people are harmed; moreover, the surface of the male buckle and the surface of the female buckle are not provided with any handles, and waterproof paint is coated on the outer surfaces of the male buckle and the female buckle, so that the outer surfaces are very smooth, the male buckle and the female buckle are difficult to be completely connected and tightly closed when a method for regularly training to use fire fighting equipment is not obtained and the gripping force is not very large, water is sprayed out from the joint, the water pressure during fire fighting is reduced, and the fire fighting time is prolonged. Therefore, a joint device for a fire hose with better sealing performance is needed to meet the needs of people.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fire control area is with piecing devices with preferred leakproofness to solve the technical problem who provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a joint device with better sealing performance for a fire fighting belt, which comprises two adaptive connectors, wherein the connectors are provided with connecting pipes, female buckles adaptive to the connectors are provided with clamping plates, the clamping plates are provided with limiting holes, the connectors are provided with bosses, and the bosses are movably arranged in the limiting holes;

the connecting pipe is connected with a partition board in a sleeved mode, a plurality of fixing rods are movably mounted on the partition board in an annular equidistant mode, fixing rods are mounted on the fixing rods in an annular equidistant mode, a plurality of movable plates are mounted on the fixing rods, a plurality of movable plates are mounted on the movable plates, springs are mounted on the movable plates, a plurality of sealing plates are mounted on the springs, and the sealing plates are matched with the connecting pipe.

Further, in a preferred embodiment of the present invention, one end of the spring is mounted on the movable plate, and the other end of the spring is mounted on the sealing plate.

Further, in the preferred embodiment of the present invention, two supporting blocks are installed on the connecting head, and two supporting blocks are installed on the partition board.

Further, in the preferred embodiment of the present invention, the baffle plate is rotatably provided with a snap ring, the snap ring is provided with a plurality of connecting rods at equal intervals, and the connecting rods are rotatably provided at equal intervals on the snap ring.

Further, in the preferred embodiment of the present invention, a plurality of rotation axes are equidistantly installed on the snap ring, a plurality of rotation axes are installed on the retention rods, a plurality of two retention holes are opened on the connection rod, and the rotation axes are respectively installed in the two retention holes in a rotating manner.

Further, in the preferred embodiment of the present invention, the partition board is provided with a plurality of fixing shafts, the snap ring is provided with a plurality of fixing holes, and the plurality of fixing shafts are movably mounted in the plurality of fixing holes respectively.

Further, in the preferred embodiment of the present invention, a plurality of T-shaped grooves are formed on the partition plate at equal intervals, a T-shaped block is slidably mounted in each T-shaped groove, and the T-shaped block is mounted on the retaining rod.

Further, in the preferred embodiment of the present invention, the snap ring is provided with a moving shaft, the moving shaft is provided with a push rod, the partition plate is provided with a movable hole, and the moving shaft is movably mounted in the movable hole.

Furthermore, in the preferred embodiment of the present invention, the push rod has a positioning hole, the positioning hole has an inserting rod movably mounted therein, the partition plate has an inserting hole, and the inserting rod runs through the positioning hole and is movably mounted in the inserting hole.

Further, in the preferred embodiment of the present invention, the connector is provided with two fixing blocks, two threaded holes are all formed in the fixing blocks, two threaded holes are all rotatably provided with a threaded shaft, and two threaded shafts are provided with a handle.

The utility model provides a pair of fire control area with preferred leakproofness is with piecing devices's beneficial effect is:

the utility model discloses in, through the setting of snap ring, boss and handle, when connecting two metal joint, place the snap ring of pin thread in the boss department of box, the boss department at the pin thread is placed to the snap ring of box, rotates two metal joint to two opposite directions simultaneously, stands up the handle on pin thread and the box surface. It should be noted that, when rotating, the two handles can be held by hands to rotate in opposite direction, so as to avoid that the outer surface of the male and female buttons is too smooth and does not exert strength; in addition, the boss on the male buckle is clamped into the limiting hole on the snap ring on the female buckle, and the boss on the female buckle is clamped into the limiting hole on the snap ring on the male buckle, so that the two metal connectors can be locked;

it should be further noted that, because the two metal joints are provided with the corresponding rubber gaskets, when the two metal joints are locked, the two rubber gaskets are attached together, so that water at the joint is prevented from overflowing, the air tightness of the fire-fighting water pipe is increased, the fire-fighting metal joint is prevented from being closed and untightened, the fire fighting time is prolonged, and the property and personal safety of a victim are damaged.

Further, the utility model discloses in, through the rational arrangement of fly leaf, spring and closing plate, when rotating the snap ring behind the fire hose cover entering connecting pipe, the snap ring drives the connecting plate and removes, and the connecting plate drives the dead lever and removes, and the dead lever drives fly leaf extrusion hosepipe, drives the spring and moves down simultaneously, spring extrusion closing plate. It should be noted that, because the fly leaf setting exactly with the surface looks adaptation of connecting pipe, now be provided with spring and closing plate again on the inner face of fly leaf, thereby can simply conveniently firmly the fire hose of cover income on the connecting pipe chucking, also need not use special screwdriver to change when installation and change, thereby "hosepipe breaks away from with the metal connector suddenly when fighting a fire and separates, need look for special screwdriver and change, waste a large amount of manpowers and time, the problem of extension fire fighting time" takes place, also can increase the leakproofness between fire hose and the connector simultaneously, it overflows to avoid having water long-time, the water pressure of water pipe leads to the fire fighting time extension when corroding the metal connector and reducing the fire fighting, harm people property and personal safety.

Drawings

Fig. 1 is a schematic view of a connection structure between a connector and a female buckle of a joint device for a fire fighting hose with better sealing performance according to the present invention;

fig. 2 is a schematic view of a connection structure between a connection head and a connection pipe of the joint device for a fire fighting belt with better sealing performance according to the present invention;

fig. 3 is a schematic view of a connection structure of a portion a in fig. 2 of a joint device for a fire hose with better sealing performance according to the present invention;

fig. 4 is a schematic view illustrating a connection structure of the partition plate, the snap ring and the movable plate of the joint device for a fire hose according to the present invention with better sealing performance;

fig. 5 is a schematic view of a connection structure of the partition plate, the snap ring and the support block of the joint device for a fire hose with better sealing performance according to the present invention.

In the figure: 1-a connector; 2-clamping plate; 3-limiting holes; 4-boss; 5, fixing blocks; 6-connecting pipe; 7-a separator; 8-a snap ring; 9-a support block; 10-a movable plate; 11-a handle; 12-a threaded hole; 13-a threaded shaft; 14-a connecting rod; 15-fixing the rod; 16-a retention rod; 17-a spring; 18-a sealing plate; 19-a fixed shaft; 20-fixing holes; 21-a rotation axis; 22-a rotating shaft; 23-a retention hole; a 24-T block; 25-T-shaped grooves; 26-a movement axis; 27-a push rod; 28-positioning holes; 29-a movable hole; 30-a plug hole; 31-a plug rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In addition, in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely vertical, but may be slightly inclined. Such as "vertical" simply means that its orientation is more vertical than "horizontal" and does not mean that the structure must be perfectly vertical, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "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 meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Referring to fig. 1-5, an embodiment of the present application provides a joint device for a fire hose with better sealing performance, which includes two adaptive joints 1, a connecting pipe 6 is disposed on the joint 1, a snap-gauge 2 is mounted on a female buckle adaptive to the joint 1, a limiting hole 3 is disposed on the snap-gauge 2, a boss 4 is mounted on the joint 1, and the boss 4 is movably mounted in the limiting hole 3.

Further, the connecting pipe 6 is sleeved with the partition plate 7, the partition plate 7 is movably provided with a plurality of fixing rods 16, the fixing rods 15 are installed on the plurality of fixing rods 16 at equal intervals in an annular mode, the movable plates 10 are installed on the plurality of fixing rods 15, the springs 17 are installed on the plurality of movable plates 10, the sealing plates 18 are installed on the springs 17, and the sealing plates 18 are matched with the connecting pipe 6. It should be noted that, in the embodiment of the present invention, through clamping the spacing hole 3 on the connector 1 on the cardboard 2 to the boss 4 on the box with the connector 1 looks adaptation, clamping the spacing hole 3 on the connector 1 on the box with the connector 1 looks adaptation to the boss 4 on the connector 1 on the cardboard 2, two counter-rotating metal connectors 1 can realize locking.

It should be further noted that the movable plate 10 moves to drive the spring 17 to extrude, and the spring 17 extrudes to drive the sealing plate 18 to move, so that the fire hose and the connecting pipe 6 can be firmly clamped, and the problems that the hose and the metal connector 1 are suddenly separated during fire fighting, a special screwdriver needs to be found for replacement, a large amount of labor and time are wasted, and the fire fighting time is prolonged are solved; meanwhile, the sealing performance between the fire hose and the connecting pipe 6 can be improved, the phenomenon that water overflows for a long time, the metal connector 1 is corroded, fire fighting time is prolonged due to the fact that the water pressure of the water pipe is reduced during fire fighting, and property and personal safety of people are damaged is avoided.

Further, referring to fig. 2-3, in the embodiment of the present invention, one end of the spring 17 is mounted on the movable plate 10, and the other end of the spring 17 is mounted on the sealing plate 18. It should be noted that, by arranging the spring 17 on the movable plate 10, the spring 17 drives the sealing plate 18 to move, so that the sealing performance between the fire hose and the connecting pipe 6 can be improved while the fire hose is clamped, and the movable plate can be adapted to connecting fire hoses of different models and the connecting pipe 6.

Further, please refer to fig. 1-2 in combination, in the embodiment of the present invention, two supporting blocks 9 are installed on the connector 1, and both the two supporting blocks 9 are installed on the partition 7. It should be noted that, by arranging the supporting block 9 on the connector 1, the supporting block 9 fixes the partition board 7, so as to limit the partition board 7 from moving.

Further, please continue to combine with fig. 1-2, in the embodiment of the present invention, two fixing blocks 5 are installed on the connector 1, threaded holes 12 are all opened on the two fixing blocks 5, threaded shafts 13 are installed in the two threaded holes 12, and a handle 11 is installed on the two threaded shafts 13. It should be noted that, by means of the handle 11, after the two metal connectors are aligned, the two metal connectors can be locked only by holding the two handles 11 and rotating in opposite directions, so as to provide a fulcrum for exerting force.

Further, please refer to fig. 2-3 in combination, in the embodiment of the present invention, the baffle 7 is rotatably installed with a snap ring 8, a plurality of connecting rods 14 are installed on the snap ring 8 in a rotating manner with an equal annular distance, and the plurality of connecting rods 14 with an equal annular distance are respectively rotatably installed on a plurality of retaining rods 16 with an equal annular distance. It should be noted that the connecting rod 14 is driven to move by the movement of the snap ring 8, and the retaining rod 16 is driven to move by the movement of the connecting rod 14, so that the fire hose is clamped by the sealing plate 18, and the sealing performance is improved to provide power.

Further, please continue to combine with referring to fig. 2-3, in the embodiment of the present invention, a plurality of rotation axes 22 are installed on the snap ring 8 at equal intervals, a rotation axis 21 is installed on the plurality of retaining rods 16, two retaining holes 23 are installed on the plurality of connecting rods 14, and the rotation axis 22 and the rotation axis 21 are respectively installed in the two retaining holes 23 in a rotating manner. It should be noted that, the rotation shaft 22 and the rotation shaft 21 rotate in the retention hole 23 of the connecting rod 14, so that the movement between the snap ring 8 and the connecting rod 14 and the retention rod 16 is more smoothly and stably facilitated.

Further, please refer to fig. 2-3 in combination, in the embodiment of the present invention, the partition plate 7 is provided with a plurality of fixing shafts 19, the snap ring 8 is provided with a plurality of fixing holes 20, and the plurality of fixing shafts 19 are movably mounted in the plurality of fixing holes 20 respectively. It should be noted that, the fixing shaft 19 on the partition plate 7 moves in the fixing hole 20 on the snap ring 8, so as to limit the snap ring 8 to only move annularly on the partition plate 7.

Further, referring to fig. 4, in the embodiment of the present invention, a plurality of T-shaped grooves 25 are annularly and equidistantly formed on the partition plate 7, T-shaped blocks 24 are slidably mounted in the T-shaped grooves 25, and the T-shaped blocks 24 are mounted on the retaining rod 16. It should be noted that the movable plate 10 and the sealing plate 18 are limited to move only in a direction toward or away from the connecting pipe 6 by the T-shaped block 24 sliding in the T-shaped groove 25.

Further, please refer to fig. 5, in an embodiment of the present invention, the moving shaft 26 is installed on the snap ring 8, the push rod 27 is connected to the moving shaft 26 through a screw thread, the partition plate 7 has a moving hole 29, and the moving shaft 26 is movably installed in the moving hole 29. It should be noted that the push rod 27 moves to drive the moving shaft 26 to move in the moving hole 29, and the moving shaft 26 moves to drive the snap ring 8 to move, so that the push rod 27 drives the snap ring 8 to move.

Further, please refer to fig. 5, in the embodiment of the present invention, the push rod 27 is provided with a positioning hole 28, an inserting rod 31 is movably mounted in the positioning hole 28, the partition plate 7 is provided with an inserting hole 30, and the inserting rod 31 penetrates through the positioning hole 28 and is movably mounted in the inserting hole 30. It should be noted that, when the snap ring 8 moves to the position of clamping the fire hose, the positioning hole 28 and the insertion hole 30 on the push rod 27 are aligned and then the insertion rod 31 is inserted, so that the snap ring 8 can be limited, and the release of the fire hose by the snap ring 8 during movement is avoided.

To sum up, the embodiment of the utility model provides a fire hose that has better leakproofness is with piecing devices's theory of operation:

when the fire hose needs to be used, the fire hose is sleeved into the connecting pipe 6, then the push rod 27 is pushed, the push rod 27 moves to drive the moving shaft 26 to move in the moving hole 29 on the partition plate 7, the moving shaft 26 moves to drive the clamping ring 8 to move, the clamping ring 8 moves to drive the rotating shaft 22 to move, the rotating shaft 22 moves to drive the connecting rod 14 to move, the connecting rod 14 moves to drive the rotating shaft 21 to move, the rotating shaft 21 moves to drive the retaining rod 16 to move, the retaining rod 16 moves to drive the fixing rod 15 to move towards the middle, and the fixing rod 15 drives the T-shaped block 24 to slide in the T-shaped groove 25 on the partition plate 7;

further, the fixed rod 15 moves to drive the movable plate 10 to move, the movable plate 10 moves to drive the spring 17 to extrude, and the spring 17 moves to drive the sealing plate 18 to move; when the push rod 27 moves to the other end of the movable hole 29, the push rod 27 is rotated to align the positioning hole 28 and the insertion hole 30 and insert the insertion rod 31, so that the clamp ring 8 is prevented from moving, the fire hose is firmly fixed on the upper surface of the connecting pipe 6 by the sealing plates 18, and the phenomenon that the hose and the metal connector 1 are separated suddenly during fire fighting is avoided, a special screwdriver needs to be found for replacement, a large amount of manpower and time are wasted, the fire fighting time is prolonged, meanwhile, the sealing performance between the fire hose and the connecting pipe 6 can be improved, the phenomenon that water overflows for a long time, the metal connector 1 is corroded, the fire fighting time is prolonged due to the fact that the water pressure of the water pipe is reduced during fire fighting is avoided, and the property and personal safety of people are damaged;

furthermore, after the hose is connected, the connector 1 is aligned with the box matched with the connector 1, then the limit hole 3 of the clamping plate 2 on the connector 1 faces to the boss 4 on the box, the limit hole 3 of the clamping plate 2 on the box is aligned to the boss 4 on the connector 1, the handle 11 is erected simultaneously, two hands respectively hold the handle 11 to reversely rotate the connector 1 and the box matched with the connector 1, the connection can be easily and tightly closed, so that the problem that when a person who does not have professional training is fighting fire, because two metal connectors 1 are not connected and tightly closed, the water pressure is reduced, the fire fighting time is prolonged, and a large amount of water resources are wasted is solved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The joint device with good sealing performance for the fire fighting belt is characterized by comprising two adaptive connectors (1), wherein a connecting pipe (6) is arranged on each connector (1), a snap gauge (2) is arranged on a female buckle adaptive to the connectors (1), a limiting hole (3) is formed in each snap gauge (2), a boss (4) is arranged on each connector (1), and each boss (4) is movably arranged in each limiting hole (3);

connecting pipe (6) is gone up to cup joint baffle (7), movable mounting has a plurality of dead position poles (16) on baffle (7), and annular equidistance is a plurality of all install dead lever (15), a plurality of on dead lever (15) all install fly leaf (10), a plurality of all install spring (17) on fly leaf (10), it is a plurality of all install a closing plate (18), a plurality of on spring (17) closing plate (18) all with connecting pipe (6) looks adaptation.

2. The joint device for fire fighting belt with better sealing performance according to claim 1, characterized in that one end of the spring (17) is mounted on the movable plate (10), and the other end of the spring (17) is mounted on the sealing plate (18).

3. The joint device with better sealing for the fire fighting belt according to claim 1, characterized in that two supporting blocks (9) are installed on the joint head (1), and both supporting blocks (9) are installed on the partition (7).

4. The joint device with better sealing performance for the fire fighting belt according to claim 3, characterized in that the partition plate (7) is rotatably provided with a snap ring (8), a plurality of connecting rods (14) are rotatably provided on the snap ring (8) at equal intervals in a ring shape, and a plurality of connecting rods (14) at equal intervals in a ring shape are respectively rotatably provided on a plurality of retaining rods (16) at equal intervals in a ring shape.

5. The joint device with better sealing performance for the fire fighting belt according to claim 4, characterized in that a plurality of rotating shafts (22) are annularly and equidistantly installed on the snap ring (8), a plurality of retaining rods (16) are all provided with a rotating shaft (21), a plurality of connecting rods (14) are all provided with two retaining holes (23), and the rotating shafts (22) and the rotating shafts (21) are respectively and rotatably installed in the two retaining holes (23).

6. The joint device with better sealing performance for the fire fighting belt according to claim 4, characterized in that a plurality of fixing shafts (19) are installed on the partition plate (7), a plurality of fixing holes (20) are opened on the snap ring (8), and the plurality of fixing shafts (19) are movably installed in the plurality of fixing holes (20) respectively.

7. The joint device for the fire fighting belt with better sealing performance according to claim 4, characterized in that a plurality of T-shaped grooves (25) are annularly and equidistantly formed on the partition plate (7), T-shaped blocks (24) are slidably mounted in the T-shaped grooves (25), and the T-shaped blocks (24) are mounted on the retaining rod (16).

8. The joint device with better sealing performance for the fire fighting belt according to claim 4, characterized in that the snap ring (8) is provided with a moving shaft (26), the moving shaft (26) is connected with a push rod (27) in a threaded manner, the partition plate (7) is provided with a moving hole (29), and the moving shaft (26) is movably arranged in the moving hole (29).

9. The joint device with better sealing performance for the fire fighting belt according to claim 8, characterized in that the push rod (27) is provided with a positioning hole (28), an insertion rod (31) is movably mounted in the positioning hole (28), the partition plate (7) is provided with an insertion hole (30), and the insertion rod (31) penetrates through the positioning hole (28) and is movably mounted in the insertion hole (30).

10. The joint device with better sealing performance for the fire fighting belt according to any one of claims 1 to 9, characterized in that two fixing blocks (5) are installed on the joint head (1), both fixing blocks (5) are provided with threaded holes (12), both threaded holes (12) are rotatably installed with threaded shafts (13), and both threaded shafts (13) are installed with a handle (11).