Safe tying and hanging device for high-place operation in building construction

Abstract

The utility model relates to the technical field of building construction, and discloses a safety hanging device for high-place operation in building construction, which comprises a connecting cylinder, a push rod movably embedded in the connecting cylinder, a limiting gland in threaded connection with one end of the connecting cylinder, and a hanging structure detachably arranged at one end, close to the limiting gland, of the connecting cylinder. The telescopic claw structure is detachably connected to the end, away from the limiting gland, of the push rod. The safety belt tying and hanging device solves the problem that an existing safety belt tying and hanging device needs to be fixed at the other end of a wall or an object in the installation process, and then installation danger is improved, the connecting cylinder and the push rod are arranged, the push rod is movably embedded in the connecting cylinder, the push rod can stretch out and draw back in the connecting cylinder, and the safety belt tying and hanging device is convenient to install. And meanwhile, a telescopic claw structure is arranged at one end of the push rod, so that when the push rod telescopically moves in the connecting cylinder, the telescopic claw is driven to retract, and the connecting cylinder and the push rod are fixed through the telescopic claw, so that the fixing is more convenient and safer.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a safety hanging device for high-altitude operation in building construction. Background Art

[0002] With the development of economy and society, residential buildings are becoming increasingly high-rise, and the building height is constantly being updated. High-altitude operations in high-rise residential buildings are becoming more and more dangerous. In recent years, there have been frequent casualties from falling from the edge of a building, which has caused heavy damage to the country, society, government departments, units involved, individuals and their families. Therefore, the requirements for safety protection and management of construction sites are becoming more and more stringent. At present, national and industry-related standards, specifications, safety operating procedures and various rules and regulations require workers working at heights to wear safety belts and to ensure their safety by tying the safety belts to safety nodes.

[0003] The existing Chinese utility model patent with authorization announcement number CN218652779U provides a hanging point device for a high-altitude work safety belt, including: a mounting plate, which is in the shape of a plate; a main rod, the main rod is vertically connected to the mounting plate, and the two ends of the main rod extend outward by a predetermined distance respectively, and one end is a stud; a nut, which is matched and installed on the stud; an oblique rod, one end of the oblique rod is connected to the mounting plate, and the other end is connected to the end of the main rod opposite to the stud; a hanging ring, which is connected to the end of the main rod opposite to the stud.

[0004] During the installation process, the above-mentioned hanging point device passes through the tension bolt holes on the wall or other fixed objects, and the main rod passing through the tension bolt holes needs to be bolted on the other end of the wall or other objects so that it is fixed on the wall or other objects. This connection method requires workers to shuttle back and forth between the two sides of the wall or object. This installation method is also dangerous at high altitudes. Utility Model Content

[0005] The utility model aims to solve the problem that the existing safety belt hanging device needs to be fixed on the wall or the other end of the object during the installation process, thereby increasing the installation danger.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A safety tie-down device for high-altitude construction work, comprising: a connecting tube;

[0008] A push rod is moved and embedded in the connecting cylinder;

[0009] A limiting gland, threadedly connected to one end of the connecting tube;

[0010] A hanging structure, detachably arranged at one end of the connecting tube close to the limiting gland;

[0011] The telescopic claw structure is detachably connected to an end of the push rod away from the limiting pressure cover.

[0012] According to the safety hook device for high-altitude construction work provided by the utility model: the telescopic claw structure includes a connecting plate, a connecting claw, a tension spring and a limiting member, the connecting plate and the connecting claw are rotatably connected together, and the connecting claw and the limiting member are connected together through a tension spring.

[0013] According to the safety hooking device for construction height operation provided by the utility model: the connecting plate is a circular structure and has a plurality of protrusions protruding from the circular edge, the connecting claw is provided with a connecting groove at one end close to the connecting plate, the connecting groove is movably engaged with the protrusion, and a pin is embedded through the connecting groove and the protrusion engaging position.

[0014] According to the safety hanging device for high-altitude construction work provided by the utility model: a pin is fixedly arranged at one end of the inner side of the connecting groove away from the protrusion, the limiting member is an arc-shaped structure, and a plurality of limiting members are arranged corresponding to the connecting claws. The plurality of limiting members are combined to form a circular ring structure, and a pin is also fixedly arranged between each of the limiting members. A tension spring is obliquely sleeved between the pin on the limiting member and the pin on the connecting claw, and the tension spring connects the limiting member and the connecting claw together.

[0015] According to the safety hook device for high-altitude construction work provided by the utility model: a limit plate and a connecting column are respectively arranged at both ends of the push rod, a first threaded connecting hole is penetrated through the limit plate, and a second threaded connecting hole is penetrated through the connecting column.

[0016] According to the safety hanging device for high-altitude construction work provided by the utility model: a threaded rod is fixedly arranged through the middle of the connecting plate, and the threaded rod is threadedly connected to the second threaded connecting hole to connect the push rod and the connecting plate together, and a circular ring structure formed by a plurality of the limiting members is sleeved on the connecting column of the push rod.

[0017] According to the safety hanging device for high-altitude construction work provided by the utility model: the limit pressure cover is a cylindrical structure, an inlay groove is opened through the middle of the bottom of the limit pressure cover, the diameter of the limit pressure cover is larger than the diameter of the connecting tube, and the limit pressure cover is used to limit the installation of the hanging structure.

[0018] According to the safety hanging device for high-altitude construction work provided by the utility model: the hanging structure is a lifting ring structure, and the lifting ring passes through the limiting gland and is threadedly connected to the pushing rod.

[0019] According to the safety hanging device for high-altitude construction work provided by the utility model: the hanging structure is a hanging piece structure, and the hanging piece is sleeved on the connecting tube and restricted and fixed by a limiting pressure cover.

[0020] The utility model has the following beneficial effects:

[0021] (1) The connecting tube and the push rod are used to move the push rod into the connecting tube, and the push rod is moved in the connecting tube, so that the push rod can be extended and retracted in the connecting tube. The limit pressure cover is then set to limit the movement of the push rod, thereby better fixing the push rod, making it more secure when the safety belt is hung.

[0022] (2) The telescopic claw structure is arranged at one end of the push rod, and the telescopic claw is driven to retract or open through the telescopic movement of the push rod, so that after the push rod and the connecting tube are inserted into the reserved groove, the retractable claw is opened, and the push rod and the connecting tube are better fixed, so that they are more stably fixed on the wall, so as to facilitate the fastening of the safety belt and make the installation of the fastening device simpler, and secondly improve the safety during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0024] Figure 2 This is a schematic diagram of the bottom structure of Embodiment 1 of the present utility model;

[0025] Figure 3 This is an exploded schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0026] Figure 4 This is an exploded schematic diagram of the bottom structure of Embodiment 1 of the present utility model;

[0027] Figure 5 This is a side structural plan view of Embodiment 1 of the utility model;

[0028] Figure 6 yes Figure 5 Sectional view at AA;

[0029] Figure 7 yes Figure 3 Enlarged view of point B in the middle;

[0030] Figure 8 This is a schematic diagram of the overall structure of Embodiment 2 of the present utility model;

[0031] Fig. 9 This is an exploded schematic diagram of the overall structure of Embodiment 2 of the present utility model;

[0032] Fig.10 It is a schematic diagram of the hanging piece structure of embodiment 2 of the utility model.

[0033] Legend:

[0034] 1. Connecting tube;

[0035] 2. Push rod; 20. Limit plate; 201. First threaded connection hole; 21. Connecting column; 210. Second connection hole;

[0036] 3. Limiting gland; 301. Inlay groove;

[0037] 4. Hanging structure;

[0038] 5. telescopic claw structure; 50. connecting plate; 501. threaded plug rod; 51. connecting claw; 510. connecting groove; 511. latch; 52. tension spring; 53. limiting member. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Example 1

[0041] Combine the following Figure 1-Figure 7 The embodiment shown describes the technical solution of the utility model:

[0042] A safety hooking device for high-altitude construction work comprises: a connecting tube 1, a push rod (2) movably embedded in the connecting tube 1, a limit gland 3 threadedly connected to one end of the connecting tube 1, a hooking structure 4 detachably arranged at one end of the connecting tube 1 close to the limit gland 3, and a telescopic claw structure 5 detachably connected to the end of the push rod 2 away from the limit gland 3.

[0043] It can be understood that the connecting tube 1 is a cylindrical structure with openings at both ends, the push rod 2 moves through the connecting tube 1, so that the push rod 2 moves in the connecting tube 1, the limiting gland 3 is a cylindrical structure with an opening at one end, and is threadedly connected to one end of the connecting tube 1 to limit the push rod 2, and the hanging structure 4 is Figure 4 The pull ring structure shown in the figure, at the same time, the pull ring passes through one end of the limiting pressure cover 3 and is threadedly connected to the push rod 2, connecting the pull ring and the push rod 2 together, and the other end of the push rod 2 is threadedly connected to the telescopic claw structure 5, and the telescopic claw structure 5 can be contracted and expanded to fix the connecting tube 1 and the push rod 2.

[0044] The safety hooking device for high-altitude operations in construction provided by the embodiment of the utility model has a connecting tube 1 and a pushing rod 2, and the pushing rod 2 is moved and embedded in the connecting tube 1, and the pushing rod 2 is moved in the connecting tube 1, so that the pushing rod 2 can be extended and retracted in the connecting tube 1. Secondly, the limiting pressure cover 3 is set to limit the movement of the pushing rod 2, and then the pushing rod 2 is better fixed, so that it is more secure when the safety belt is hung.

[0045] Furthermore, by setting up a telescopic claw structure 5, the telescopic claw structure 5 is set at one end of the pushing rod 2, and the telescopic movement of the pushing rod 2 drives the telescopic claw to retract or open, so that after the pushing rod 2 and the connecting tube 1 are inserted into the reserved groove, the retractable claw is opened, and at the same time, the pushing rod 2 and the connecting tube 1 are better fixed, so that they are more stably fixed on the wall, thereby making it more convenient to fasten the safety belt, and at the same time making the installation of the hanging device simpler, secondly improving the safety during installation.

[0046] According to the safety belay device for construction height operations provided by the embodiment of the utility model, the telescopic claw structure 5 includes a connecting plate 50, a connecting claw 51, a tension spring 52 and a limiting member 53, the connecting plate 50 and the connecting claw 51 are rotatably connected together, and the connecting claw 51 and the limiting member 53 are connected together by the tension spring 52.

[0047] Figure 1 and Figure 2 A safety hook device for high-altitude operations in construction is implemented, and the retractable claw structure is formed by a connection plate 50, a connection claw 51, a tension spring 52 and a limiting member 53. Secondly, the connection plate 50 and the connection claw 51 are rotatably connected together, so that the connection claw 51 can rotate at the connection point of the connection plate 50. At the same time, the connection claw 51 and the limiting member 53 are connected together by the tension spring 52, and when the connection claw 51 rotates, the tension spring 52 is pulled to retract.

[0048] The safety hook device for high-altitude construction operations provided by the embodiment of the utility model, through the setting of the connecting plate 50, the connecting claw 51, the tension spring 52 and the limiting member 53, through the combination of the various components and the mutual cooperation, so as to better enable the connecting claw 51 to move on the connecting plate 50, and at the same time enable the connecting claw 51 to contract and expand, so as to better fix the connecting tube 1 and the pushing rod 2, so that they can be better fixed on the wall, thereby making the installation more convenient.

[0049] According to the safety belay device for construction work at height provided by the embodiment of the utility model, the connecting plate 50 is a circular structure and has a plurality of protrusions protruding from the circular edge, and a connecting groove 510 is provided at one end of the connecting claw 51 close to the connecting plate 50, and the connecting groove 510 is movably engaged with the protrusion, and a pin 511 is embedded through the engaging position between the connecting groove 510 and the protrusion.

[0050] Figure 4 and Figure 7 A safety hooking device for high-altitude construction work is implemented in the invention, wherein the connecting plate 50 is arranged as a circular structure, and a plurality of protrusions are protrudingly arranged on the circular edge of the connecting plate 50, and a connecting groove 510 is provided at one end of the connecting claw 51 close to the connecting plate 50, and the connecting groove 510 and the protrusion are movably engaged with each other, and an embedded pin 511 is passed through the engaging position of the connecting groove 510 and the protrusion, so that the connecting claw 51 can rotate at the connecting plate 50.

[0051] The safety hook device for high-altitude construction work provided by the embodiment of the utility model can better facilitate the connection between the connecting plate 50 and the connecting claw 51 through the set protrusions and connecting grooves 510. At the same time, four protrusions are preferably provided, and the number of connecting claws 51 corresponds to the protrusions, and four connecting claws 51 are also provided. At the same time, the connecting claw 51 is arranged on the connecting plate 50 through the pin 511 so that it can rotate at the protrusion and the connecting groove 510, thereby better facilitating the expansion and contraction of the connecting claw 51, and then facilitating the fixing of the connecting claw 51 to the entire device at the other end of the wall, and making the installation safer.

[0052] According to the safety hook device for high-altitude construction work provided by the embodiment of the utility model, a pin 511 is fixedly arranged at one end of the inner side of the connecting groove 510 away from the protrusion, the limiting member 53 is an arc-shaped structure, and a plurality of limiting members 53 are arranged corresponding to the connecting claws 51. The plurality of limiting members 53 are combined to form a circular ring structure, and a pin 511 is also fixedly arranged between each limiting member 53. A tension spring 52 is obliquely sleeved between the pin 511 on the limiting member 53 and the pin 511 on the connecting claw 51, and the tension spring 52 connects the limiting member 53 and the connecting claw 51 together.

[0053] Figure 1 and Figure 7A safety tie-down device for working at heights in construction is implemented, in which a latch 511 is welded at one end of the inner side of the connecting groove 510 away from the protrusion, so that the latch 511 is fixed. At the same time, the limiting member 53 is an arc-shaped structure. The limiting member 53 is set corresponding to the connecting claw 51 when it is set. There are also four limiting members 53, and the four limiting members 53 are combined to form a circular ring structure. During the combination of the limiting members 53, a latch 511 is also welded between each limiting member 53, and the limiting members 53 are connected together by the latch 511. At the same time, the two ends of the tension spring 52 are connected by the latch 511 welded on the connecting claw 51 and the limiting member 53, so that the tension spring 52 is connected between the limiting member 53 and the connecting claw 51.

[0054] The safety tie-down device for construction height operations provided by the embodiment of the utility model can better connect the tension spring 52 through the pin 511 welded on the connecting claw 51 and the limiting member 53, and at the same time better enable the tension spring 52 to stretch or limit the movement of the connecting claw 51, and at the same time make the fixation by the connecting claw 51 more stable, and secondly better improve the overall installation effect, so that after installation, the tension spring 52 can better limit the stretching of the connecting claw 51, so that it will not shrink under the action of gravity, thereby improving safety.

[0055] According to the safety belay device for construction height operations provided by the embodiment of the utility model, a limit plate 20 and a connecting column 21 are respectively provided at both ends of the push rod 2, a first threaded connecting hole 201 is penetrated through the limit plate 20, and a second threaded connecting hole is penetrated through the connecting column 21.

[0056] Figure 3 and Figure 4 A safety belay device for high-altitude operations in construction is implemented, wherein a limit plate 20 and a connecting column 21 are respectively arranged at both ends of a push rod 2. The diameter of the limit plate 20 is larger than the diameter of the push rod 2, and is restricted to one end of the connecting tube after installation, while the diameter of the connecting column 21 is smaller than the diameter of the push rod 2, and the connecting column 21 is integrally formed with the push rod 2, a first threaded connection hole 201 is provided at one end of the limit plate 20, and a second threaded connection hole is provided at one end of the connecting column 21.

[0057] The safety belay device for construction height operations provided by the embodiment of the utility model can better limit one end of the push rod 2 through the set limit plate 20, so that it will not completely enter the connecting tube 1, thereby playing a limiting role. Secondly, the set connecting column 21 enables the push rod 2 to be better connected with the limiting member 53 and the connecting plate 50, and at the same time makes the connection between the push rod 2 and the limiting member 53 and the connecting plate 50 more firmly, and at the same time, it is more convenient to drive the limiting member 53 and the connecting plate 50 to move at the same time when the push rod 2 is pulled, thereby facilitating the contraction of the connecting claw 51, so as to facilitate better fixation.

[0058] According to the safety belay device for construction height operations provided by the embodiment of the utility model, a threaded rod 501 is fixedly provided through the middle of the connecting plate 50, and the threaded rod 501 is threadedly connected to the second threaded connecting hole to connect the push rod 2 and the connecting plate 50 together, and a circular ring structure formed by a plurality of limiting members 53 is sleeved on the connecting column 21 of the push rod 2.

[0059] Figure 4 and Figure 6 A safety hooking device for high-altitude construction work is implemented, in which a threaded connecting rod 501 is passed through the middle of the connecting plate 50, and the threaded connecting rod 501 is threadedly connected to the second threaded connecting hole, so that the push rod 2 and the connecting plate 50 are combined and connected together. At the same time, in the process of connecting the push rod 2 and the connecting plate 50, the circular ring formed by the limiting member 53 is set on the connecting column 21 of the push rod 2, and then the limiting member 53 is pressed against the connecting column 21, so that the connection between the push rod 2 and the connecting plate 50 and the limiting member 53 is tighter and more firmly.

[0060] The safety belay device for construction height operations provided by the embodiment of the utility model can better connect the push rod 2 and the connecting plate 50 together through the set threaded plug rod 501, and at the same time, the circular ring formed by the combination of the limiting members 53 is set on the connecting column 21 during the connection process, so that the connecting plate 50 is more secure after being connected to the push rod 2, and can move simultaneously when the push rod 2 contracts, thereby better facilitating the installation of the entire device, making the installation more convenient and quick, and better improving the overall use effect.

[0061] According to the safety hook device for high-altitude construction work provided by the embodiment of the utility model, the limiting gland 3 is a cylindrical structure, and an embedding groove 301 is opened through the middle of the bottom of the limiting gland 3, and the embedding groove 301 is used for passing through and installing the pull ring.

[0062] Figure 3 and Figure 6A safety tie-down device for high-altitude construction work is implemented, in which the limit pressure cover 3 is set as a cylindrical structure with an opening at one end, and an inlay groove 301 is penetrated through the non-open end of the limit pressure cover 3, and when the push rod 2 is pushed and installed on the wall, the push rod 2 is reset. After the push rod 2 is reset, the limit pressure cover 3 and the connecting tube 1 are threadedly connected together, thereby restricting the push rod 2 so that it will not perform telescopic movement, thereby making the tie-down device more stable after installation, and secondly, a pull ring is inserted through the set inlay groove 301, the pull ring is threadedly connected to the first threaded connection hole 201, and the pull ring is connected to the push rod 2, and when the push rod 2 is pushed, the pull ring can also be installed on the push rod 2 for pushing, so that the push rod 2 is convenient to push.

[0063] The safety hooking device for high-altitude construction operations provided by the embodiment of the utility model can better limit the push rod 2 and the connecting tube 1 together through the provided limit pressure cover 3, so that the push rod 2 no longer extends and retracts after passing through the reserved hole and is fixed, so that the hooking device installed on the wall is safer after the safety belt is hung. Secondly, it is more convenient to install the hooking device, further improving the safety of installation. At the same time, the provided inlay groove 301 can better enable the pull ring to be accessed, thereby making it more convenient to hang the safety belt.

[0064] Example 2

[0065] Combination Figure 8-Figure 10 Embodiment 2 is described:

[0066] The overall structure of Example 2 is the same as that of Example 1, except that the hanging structure is a hanging piece. Fig. 9 In the implemented technical solution, the hanging piece is sleeved on the connecting tube 1, and then the limiting pressure cover 3 is threadedly sleeved on the connecting tube 1 to fix and restrict the sleeved hanging piece so that it can be better restricted on the connecting tube 1 and the wall, thereby implementing another hanging effect.

[0067] The use is basically the same as that in Example 1, that is, the connecting tube 1 and the pushing rod 2 are first stretched against each other so that the connecting claw 51 is contracted and enters the connecting tube 1, and then the connecting claw 51 together with the connecting tube 1 and the pushing rod 2 are passed through the reserved hole on the wall. After passing through the reserved hole, the connecting claw 51 is opened again so that it contacts the other end of the wall and is then fixed. The difference is that after passing through and fixing, the hanging piece is first sleeved on the connecting tube 1 so that it contacts the wall, and then the limiting pressure cover 3 is threadedly sleeved on the connecting tube 1, and then the hanging piece is restricted and fixed, so that the hanging piece is better fixed on the wall, thereby realizing hanging, and making the hanging of the safety belt more convenient.

[0068] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety tie-down device for high-altitude construction work, characterized in that: include: Connecting tube (1); A push rod (2) is movably embedded in the connecting tube (1); A limiting gland (3) threadedly connected to one end of the connecting tube (1); A hanging structure (4) is detachably arranged at one end of the connecting tube (1) close to the limiting gland (3); The telescopic claw structure (5) is detachably connected to an end of the push rod (2) away from the limiting pressure cover (3).

2. A safety tie-down device for high-altitude construction work according to claim 1, characterized in that: The telescopic claw structure (5) comprises a connecting plate (50), a connecting claw (51), a tension spring (52) and a limiting member (53); the connecting plate (50) and the connecting claw (51) are rotatably connected together, and the connecting claw (51) and the limiting member (53) are connected together via the tension spring (52).

3. A safety tie-down device for high-altitude construction work according to claim 2, characterized in that: The connecting plate (50) is a circular structure with a plurality of protruding blocks protruding from the circular edge; a connecting groove (510) is provided at one end of the connecting claw (51) close to the connecting plate (50); the connecting groove (510) is movably engaged with the protruding blocks; a latch (511) is embedded through the engaging position between the connecting groove (510) and the protruding blocks.

4. A safety tie-down device for high-altitude construction work according to claim 3, characterized in that: A latch (511) is fixedly arranged at one end of the inner side of the connection groove (510) away from the protrusion, the limiting member (53) is an arc-shaped structure, a plurality of limiting members (53) are arranged corresponding to the connecting claw (51), and a plurality of limiting members (53) are combined to form a circular ring structure, and a latch (511) is also fixedly arranged between each of the limiting members (53), and a tension spring (52) is obliquely sleeved between the latch (511) on the limiting member (53) and the latch (511) on the connecting claw (51), and the tension spring (52) connects the limiting member (53) and the connecting claw (51) together.

5. A safety tie-down device for high-altitude construction work according to claim 4, characterized in that: A limit plate (20) and a connecting column (21) are respectively provided at both ends of the push rod (2); a first threaded connecting hole (201) is penetrated through the limit plate (20), and a second threaded connecting hole is penetrated through the connecting column (21).

6. A safety tie-down device for high-altitude construction work according to claim 5, characterized in that: A threaded rod (501) is fixedly provided in the middle of the connecting plate (50) and penetrates therethrough. The threaded rod (501) is threadedly connected to the second threaded connection hole, so that the push rod (2) and the connecting plate (50) are connected together. The circular ring structure formed by the plurality of limiting members (53) is sleeved on the connecting column (21) of the push rod (2).

7. A safety tie-down device for high-altitude construction work according to claim 1, characterized in that: The limiting gland (3) is a cylindrical structure, and an inlay groove (301) is provided through the middle of the bottom of the limiting gland (3). The diameter of the limiting gland (3) is greater than the diameter of the connecting tube (1), and the limiting gland (3) is used to limit the installation of the hanging structure (4).

8. A safety tie-down device for high-altitude construction work according to claim 7, characterized in that: The hanging structure (4) is a lifting ring structure, and the lifting ring passes through the limiting gland (3) and is threadedly connected to the push rod (2).

9. A safety tie-down device for high-altitude construction work according to claim 7, characterized in that: The hanging structure (4) is a hanging piece structure, and the hanging piece is sleeved on the connecting tube (1) and is restricted and fixed by a limiting pressure cover (3).

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