CN219775080U

CN219775080U - Novel connecting device

Info

Publication number: CN219775080U
Application number: CN202320523928.2U
Authority: CN
Inventors: 陈亮; 刘琛; 梅金龙
Original assignee: Chongqing Hehui Pharmaceutical Co ltd
Current assignee: Chongqing Hehui Pharmaceutical Co ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-09-29
Anticipated expiration: 2033-03-17

Abstract

The utility model relates to the technical field of hydrogenation equipment, in particular to a novel connecting device. Including connecting tube, connecting tube's quantity is two, installs the fixed casing that is used for connecting between two connecting tube, and the inboard equipartition sliding connection of fixed casing has locating component, and drive assembly is still installed to the inside of fixed casing for drive locating component through drive assembly and remove, drive assembly includes spliced pole, screw thread section, first drive gear and transmission ring gear, and the inboard rotation of fixed casing is connected with the transmission ring gear. According to the novel connecting device, two connecting pipelines are contacted with the inner side of the center of the fixed shell, then the positioning assembly is driven to move through the operation of the driving assembly, the positions of the connecting pipelines and the fixed shell are positioned through the plurality of positioning assemblies through the movement of the positioning assembly on the inner side of the fixed shell, and meanwhile leakage between the two connecting pipelines is prevented.

Description

Novel connecting device

Technical Field

The utility model relates to the technical field of hydrogenation equipment, in particular to a novel connecting device.

Background

Hydrogen is widely used as an important chemical raw material in petrochemical industry, organic synthesis, food industry, microelectronics industry, metallurgical industry and silicate industry. In the industrial production process, hydrogen in the hydrogen storage device is required to be transmitted to a corresponding production unit through a hydrogen conveying pipe so as to meet the requirement of industrial production on hydrogen raw materials.

Compared with fossil energy, hydrogen energy is a clean, environment-friendly and renewable secondary energy, has stable, reliable and irreplaceable functions in the aspects of connecting renewable energy to store energy and regulating energy, and is an important component in energy structures of future countries or the world. Hydrogen energy power generation, hydrogen fuel cells and applied hydrogen energy automobiles are all important development directions of future technologies. In the field of hydrogen energy, hydrogen generated by a hydrogen generator by utilizing electric energy needs to be conveyed to a hydrogen storage device (equipment) through a hydrogen conveying pipe, and in the process of hydrogen energy production and utilization, the hydrogen in the hydrogen storage device (equipment) needs to be conveyed to an energy conversion or production unit through the hydrogen conveying pipe so as to obtain corresponding energy.

As disclosed in chinese patent (CN 202220982926.5), a hydrogen gas delivery pipe and a hydrogen gas delivery pipe are disclosed, wherein the steel pipe body of the hydrogen gas delivery pipe has a lumen with a circular cross section, and the inner wall of the lumen of the steel pipe body is provided with a nanocomposite coating for preventing hydrogen atoms from diffusing into the steel pipe body; the outer diameter of the steel pipe body is not more than millimeter, and the diameter of the pipe cavity of the steel pipe body is not more than millimeter, so that the problem that if the seamless steel pipes convey hydrogen for a long time, hydrogen atoms can be diffused and dissolved in the steel pipes to generate a hydrogen embrittlement phenomenon, so that the mechanical properties of the seamless steel pipes are deteriorated, the pipeline is invalid, and the safe and reliable conveying of the hydrogen cannot be realized is solved. The term "hydrogen embrittlement" means that hydrogen dissolved in steel polymerizes into hydrogen molecules causing stress concentration beyond the strength limit of the steel, forming fine cracks inside the steel. The hydrogen embrittlement can be prevented only, and once the hydrogen embrittlement is generated, the technical problem can not be eliminated;

when the above technology is used, the following technical problems are found in the prior art: when the hydrogen conveying pipeline is replaced, two pipelines are required to be connected, and the existing pipeline connecting device is not stable enough, so that a novel connecting device is designed and used for providing another technical scheme for the technical problem.

Disclosure of Invention

Based on this, it is necessary to provide a novel connecting device for contacting two connecting pipes at the inner side of the center of the fixing shell, then driving the positioning assembly to move through the operation of the driving assembly, and positioning the connecting pipes and the fixing shell through the positioning assembly by moving the positioning assembly at the inner side of the fixing shell, thereby preventing leakage between the two connecting pipes.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a novel connecting device, includes connecting tube, connecting tube's quantity is two, two install the fixed shell that is used for connecting between the connecting tube, the inboard equipartition sliding connection of fixed shell has locating component, drive assembly is still installed to the inside of fixed shell for drive locating component through drive assembly and remove.

As a preferred implementation mode of the novel connecting device, the positioning assembly comprises a positioning plate and a connecting plate, wherein the positioning plates are arranged at two ends of the connecting plate, and the positioning plate is connected with the connecting plate through a connecting piece.

As a preferred implementation mode of the novel connecting device provided by the utility model, the driving assembly comprises a rotating column, a thread section, a first transmission gear and a transmission toothed ring, the inner side of the fixing shell is rotationally connected with the rotating column at a position corresponding to the connecting plate, the outer side of one end of the rotating column is fixedly provided with the first transmission gear, the first transmission gear is meshed with the transmission toothed ring, the thread section is arranged on the outer side of the rotating column, and the outer side of the thread section is in threaded connection with the connecting plate.

As a preferred implementation mode of the novel connecting device provided by the utility model, one end of the transmission gear ring is uniformly and fixedly provided with the limiting columns, and the limiting columns are in sliding connection with the fixed shell.

As a preferred implementation mode of the novel connecting device provided by the utility model, a clamping driving motor is also fixed in the fixing shell, the output end of the clamping driving motor is connected with a second transmission gear, and the second transmission gear is meshed and connected with a transmission toothed ring.

As a preferred implementation manner of the novel connecting device provided by the utility model, the connecting piece comprises a first sliding plate, a first bolt and a limiting block, wherein the first sliding plate is fixed at both ends of the connecting plate and is in sliding connection with the positioning plate, the limiting block is in sliding connection with the inner part of the positioning plate, the limiting block is in sliding connection with the first sliding plate, the first bolt is rotationally connected with the inner side of the positioning plate, and the outer side of one end of the first bolt is in threaded connection with the limiting block.

As a preferred embodiment of the novel connecting device provided by the utility model, the second sliding plates are fixed on the two sides of the connecting plate and positioned at the top of the first sliding plate, and the second sliding plates are in sliding connection with the positioning plates.

As a preferred implementation mode of the novel connecting device provided by the utility model, the connecting piece comprises a third sliding plate, a positioning block and a reset spring, wherein the third sliding plate is fixedly arranged at two ends of the connecting plate, the third sliding plate is in sliding connection with the positioning plate, the positioning block is fixedly connected inside the top end and the bottom end of the third sliding plate, the positioning block is in sliding connection with the positioning plate, and the reset spring is fixedly arranged inside the third sliding plate and at the bottom of the positioning block.

As a preferred implementation mode of the novel connecting device provided by the utility model, one end, far away from the connecting plate, of the top of the positioning block is provided with an inclined surface.

As a preferred embodiment of the novel connecting device provided by the utility model, the positioning plate is internally connected with a second bolt in a threaded manner.

It can be clearly seen that the technical problems to be solved by the present utility model can be necessarily solved by the above-mentioned technical solutions of the present utility model.

Meanwhile, through the technical scheme, the utility model has at least the following beneficial effects:

according to the novel connecting device, two connecting pipelines are contacted with the inner side of the center of the fixed shell, then the positioning assembly is driven to move through the operation of the driving assembly, the positions of the connecting pipelines and the fixed shell are positioned through the plurality of positioning assemblies through the movement of the positioning assembly on the inner side of the fixed shell, and meanwhile leakage between the two connecting pipelines is prevented;

through the cooperation of the rotating column, the thread section, the first transmission gear and the transmission toothed ring, when the transmission toothed ring rotates, the rotating column is driven to rotate through the meshing connection of the transmission toothed ring and the first transmission gear, the thread section is driven to rotate through the rotation of the rotating column, and then the positioning assembly is driven to move;

through the cooperation of locating plate, connecting plate and connecting piece, can be convenient for separate the assembly between connecting plate and the locating plate, and then can be convenient for change the locating plate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the deployment structure of the present utility model;

FIG. 3 is a schematic view showing the internal structure of the fixing case of the present utility model;

FIG. 4 is a schematic view of the structure of the driving ring gear of the present utility model;

FIG. 5 is a schematic view of a first sliding plate according to the present utility model;

FIG. 6 is a schematic view of a stopper according to the present utility model;

FIG. 7 is a schematic view of a third sliding plate according to the present utility model;

fig. 8 is a schematic view of the internal structure of the third sliding plate of the present utility model.

In the figure: 1. a connecting pipe; 2. a fixed case; 3. a positioning plate; 4. a connecting plate; 5. rotating the column; 6. a threaded section; 7. a first transmission gear; 8. a drive ring gear; 9. a limit column; 10. clamping a driving motor; 11. a second transmission gear; 12. a first sliding plate; 13. a second sliding plate; 14. a first bolt; 15. a limiting block; 16. a third sliding plate; 17. a positioning block; 18. a return spring; 19. and a second bolt.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As described in the background art, when the hydrogen delivery pipe is replaced, it is necessary to connect the two pipes, and the existing pipe connection device is not stable enough.

In order to solve the technical problem, the utility model provides a novel connecting device.

Specifically, referring to fig. 1 to 4, the connection device specifically includes:

the connecting pipelines 1 are two in number, a fixing shell 2 used for connecting is arranged between the two connecting pipelines 1 and used for positioning the connecting positions of the two connecting pipelines 1, and positioning components are uniformly distributed and slidingly connected on the inner side of the fixing shell 2, so that the connecting pipelines 1 and the fixing shell 2 can be stably positioned through movement of the positioning components;

the driving component is positioned in the fixed shell 2 and is used for driving the positioning component to move through the driving component.

According to the novel connecting device provided by the utility model, the two connecting pipelines 1 are contacted with each other at the inner side of the center of the fixed shell 2, then the positioning assembly is driven to move through the operation of the driving assembly, the positions of the connecting pipelines 1 and the fixed shell 2 are positioned through the plurality of positioning assemblies through the movement of the positioning assembly at the inner side of the fixed shell 2, and meanwhile, the two connecting pipelines 1 are prevented from leaking.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

It should be noted that, under the condition of no conflict, the embodiments of the present utility model and the features and technical solutions in the embodiments may be combined with each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Example 1

Referring to fig. 1-4, a novel connecting device comprises two connecting pipelines 1, wherein a fixed shell 2 for connection is arranged between the two connecting pipelines 1 and is used for positioning the connection positions of the two connecting pipelines 1, and positioning components are uniformly distributed and slidingly connected on the inner side of the fixed shell 2, so that the connection between the connecting pipelines 1 and the fixed shell 2 can be stably positioned through the movement of a plurality of positioning components;

the positioning assembly comprises a positioning plate 3 and a connecting plate 4, wherein the positioning plate 3 is arranged at two ends of the connecting plate 4, the positioning plate 3 is connected with the fixed shell 2 and the connecting plate 4 is connected with the fixed shell 2 in a sliding manner, so that the positioning plate 3 and the connecting plate 4 can slide on the inner side of the fixed shell 2, the positioning plate 3 and the connecting plate 4 are connected through connecting pieces, the positioning plate 3 and the connecting plate 4 can be assembled and separated through the connecting pieces, and the positioning plate 3 can be replaced independently;

the inside of the fixed shell 2 is also provided with a driving component which is used for driving the positioning component to move through the driving component, the driving component comprises a rotating column 5, a thread section 6, a first transmission gear 7, a transmission toothed ring 8, a clamping driving motor 10 and a second transmission gear 11, the inner side of the fixed shell 2 is rotationally connected with the transmission toothed ring 8, one end of the transmission toothed ring 8 is uniformly distributed and fixed with a limit column 9, the limit column 9 is in sliding connection with the fixed shell 2, the transmission toothed ring 8 can stably rotate on the inner side of the fixed shell 2, the rotating column 5 is rotationally connected on the inner side of the fixed shell 2 and at a position corresponding to the connecting plate 4, a first transmission gear 7 is fixed on the outer side of one end of the rotating column 5, and the first transmission gear 7 is in meshed connection with the transmission toothed ring 8, so that a plurality of first transmission gears 7 in meshed connection can be driven by the rotation of the transmission toothed ring 8 to synchronously rotate;

the screw thread section 6 has been seted up in the outside of the post 5 that rotates, and screw thread section 6's outside and connecting plate 4 threaded connection, thereby can drive threaded connection's connecting plate 4 through the rotation of screw thread section 6 and remove, the inside of fixed shell 2 still is fixed with centre gripping driving motor 10, centre gripping driving motor 10's output is connected with second drive gear 11, and second drive gear 11 and transmission ring gear 8 meshing are connected, thereby can drive transmission ring gear 8 through the rotation of second drive gear 11 and rotate.

According to the connecting device provided by the embodiment, two connecting pipelines 1 are contacted with the inner side of the center of the fixed shell 2, then the second transmission gear 11 is driven to rotate through the electric connection between the clamping driving motor 10 and an external power supply, then the second transmission gear 11 is driven to rotate through the rotation of the clamping driving motor 10, the second transmission gear 11 rotates to drive the transmission toothed ring 8 to rotate through the meshing connection with the transmission toothed ring 8, the rotation of the transmission toothed ring 8 drives the first transmission gears 7 connected in a plurality of meshing manner to rotate, the rotation of the first transmission gears 7 drives the thread segments 6 to rotate through the rotating columns 5, the rotation of the thread segments 6 drives the connecting plates 4 in threaded connection with the outer side to move, the connecting plates 4 are enabled to move stably on the inner side of the fixed shell 2, the positioning plates 3 are driven to move through the movement of the connecting plates 4, and the two connecting pipelines 1 are positioned through the movement of the positioning plates 3.

Example two

Referring to fig. 5-6, a novel connecting device is disclosed on the basis of the first embodiment, the connecting piece comprises a first sliding plate 12, a second sliding plate 13, a first bolt 14 and a limiting block 15, the two ends of the connecting plate 4 are both fixed with the first sliding plate 12, the first sliding plate 12 is in sliding connection with the positioning plate 3, the two sides of the connecting plate 4 are positioned at the top of the first sliding plate 12 and are fixedly provided with the second sliding plate 13, the second sliding plate 13 is in sliding connection with the positioning plate 3, so that the positioning and strengthening positioning can be performed through the sliding connection of the second sliding plate 13 and the positioning plate 3, the inside of the positioning plate 3 is in sliding connection with the limiting block 15, the limiting block 15 is in sliding connection with the first sliding plate 12, the limiting block 15 can enter the inside of the first sliding plate 12 to position the first sliding plate 12 in sliding movement, the inside of the positioning plate 3 is rotationally connected with the first bolt 14, and the outer side of one end of the first bolt 14 is in threaded connection with the limiting block 15, so that the limiting block 15 can be moved through the rotation of the first bolt 14.

According to the connecting device provided by the embodiment, when the locating plate 3 and the connecting plate 4 are assembled, the second sliding plate 13 firstly enters the inside of the locating plate 3 through the sliding connection between the second sliding plate 13 and the locating plate 3, then the first sliding plate 12 enters the inside of the connecting plate 4 through the sliding connection, after the locating plate 3 and the connecting plate 4 are in contact, the first bolt 14 is rotated through the sliding connection between the limiting block 15 and the locating plate 3, and the first bolt 14 is rotated through the rotation of the first bolt 14 to drive the threaded connection limiting block 15 to move, so that the limiting block 15 moves in the inside of the locating plate 3, and then the limiting block 15 enters the first sliding plate 12 positioned in the inside of the locating plate 3, so that the position of the first sliding plate 12 is located.

Example III

Referring to fig. 7 to 8, a novel connecting device is disclosed on the basis of the first embodiment, the connecting piece comprises a third sliding plate 16, a positioning block 17, a return spring 18 and a second bolt 19, both ends of the connecting plate 4 are fixed with the third sliding plate 16, the third sliding plate 16 is slidably connected with the positioning plate 3, thereby the positioning plate 3 can be installed at both ends of the connecting plate 4 through the sliding connection, the positioning block 17 is slidably connected inside both the top end and the bottom end of the third sliding plate 16, and the positioning block 17 is slidably connected with the positioning plate 3, so that the positioning block 17 can slide inside the third sliding plate 16;

the inclined plane has been seted up to the one end that locating piece 17 top kept away from connecting plate 4 to can let locating piece 17 let the inside of locating plate 3 be convenient for get into through the inclined plane third sliding plate 16, the inside of third sliding plate 16 just is fixed with reset spring 18 in the bottom of locating piece 17, thereby can reset through reset spring 18's compression and rebound when locating piece 17 stretches out and draws back, the inside threaded connection of locating plate 3 has second bolt 19, thereby can extrude locating piece 17 through the rotation lift of second bolt 19.

According to the connecting device provided by the embodiment, when the positioning plate 3 and the connecting plate 4 are connected, the third sliding plate 16 enters the positioning plate 3 through sliding connection, then the positioning block 17 is extruded by the positioning plate 3 through the inclined surface, the positioning block 17 enters the third sliding plate 16 after being extruded, the sliding of the positioning block 17 extrudes the reset spring 18, then when the third sliding plate 16 completely enters the positioning plate 3, the positioning plate 3 is contacted with the connecting plate 4, the positioning block 17 enters the position of the positioning plate 3 in sliding connection, the rebound of the reset spring 18 drives the positioning block 17 to reset, when the positioning plate 3 and the connecting plate 4 are separated, the second bolt 19 is rotated, the second bolt 19 descends in the positioning plate 3 in threaded connection, the second bolt 19 descends to extrude the positioning block 17, and the positioning plate 3 and the third sliding plate 16 can be separated.

The use process of the novel connecting device provided by the utility model is as follows:

the two connecting pipelines 1 are contacted with the inner side of the center of the fixed shell 2, then the second transmission gear 11 is driven to rotate through the electric connection between the clamping driving motor 10 and an external power supply, then the second transmission gear 11 is driven to rotate through the rotation of the clamping driving motor 10, the second transmission gear 11 rotates to drive the transmission toothed ring 8 to rotate through the meshed connection with the transmission toothed ring 8, the rotation of the transmission toothed ring 8 drives the first transmission gears 7 in meshed connection to rotate, the rotation of the first transmission gears 7 drives the threaded sections 6 to rotate through the rotating columns 5, the rotation of the threaded sections 6 drives the connecting plates 4 in threaded connection to move outside, the connecting plates 4 move steadily on the inner side of the fixed shell 2, the positioning plates 3 are driven to move through the movement of the connecting plates 4, and the two connecting pipelines 1 are positioned through the movement of the positioning plates 3;

when the positioning plate 3 and the connecting plate 4 are assembled, the second sliding plate 13 firstly enters the positioning plate 3 through the sliding connection between the second sliding plate 13 and the positioning plate 3, then the first sliding plate 12 enters the connecting plate 4 through the sliding connection, so that after the positioning plate 3 and the connecting plate 4 are contacted, the first bolt 14 is rotated through the sliding connection between the first bolt 15 and the positioning plate 3, the first bolt 14 drives the threaded connection limiting block 15 to move when rotated through the rotation of the first bolt 14, the limiting block 15 moves in the positioning plate 3, and then the limiting block 15 enters the first sliding plate 12 positioned in the positioning plate 3, and then the position of the first sliding plate 12 is positioned;

when the positioning plate 3 is connected with the connecting plate 4, the third sliding plate 16 is connected into the positioning plate 3 through sliding connection, then the positioning block 17 is extruded by the positioning plate 3 through the inclined surface, the positioning block 17 is extruded to enter the third sliding plate 16, the reset spring 18 is extruded by sliding of the positioning block 17, then when the third sliding plate 16 completely enters the positioning plate 3, the positioning plate 3 is contacted with the connecting plate 4, the positioning block 17 enters the position of the positioning plate 3 in sliding connection, the rebound of the reset spring 18 drives the positioning block 17 to perform reset movement, when the positioning plate 3 and the connecting plate 4 are separated, the second bolt 19 is rotated, the second bolt 19 descends in the positioning plate 3 in threaded connection, the positioning block 17 is extruded by descending of the second bolt 19, and the positioning plate 3 and the third sliding plate 16 can be separated.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a novel connecting device, includes connecting tube (1), its characterized in that, the quantity of connecting tube (1) is two, two install between connecting tube (1) and be used for connecting fixed shell (2), the inboard equipartition sliding connection of fixed shell (2) has locating component, drive assembly is still installed to the inside of fixed shell (2) for move through drive assembly drive locating component.

2. The novel connecting device according to claim 1, wherein the positioning assembly comprises a positioning plate (3) and a connecting plate (4), both ends of the connecting plate (4) are provided with the positioning plate (3), and the positioning plate (3) and the connecting plate (4) are connected through a connecting piece.

3. The novel connecting device according to claim 1, wherein the driving assembly comprises a rotating column (5), a thread section (6), a first transmission gear (7) and a transmission toothed ring (8), the transmission toothed ring (8) is rotationally connected to the inner side of the fixed shell (2), the rotating column (5) is rotationally connected to the inner side of the fixed shell (2) and the position corresponding to the connecting plate (4), the first transmission gear (7) is fixed to the outer side of one end of the rotating column (5), the first transmission gear (7) is in meshed connection with the transmission toothed ring (8), the thread section (6) is arranged on the outer side of the rotating column (5), and the outer side of the thread section (6) is in threaded connection with the connecting plate (4).

4. A novel connecting device according to claim 3, characterized in that one end of the transmission gear ring (8) is uniformly provided with limiting columns (9), and the limiting columns (9) are slidably connected with the fixed shell (2).

5. A novel connecting device according to claim 3, characterized in that the inside of the fixed shell (2) is also fixed with a clamping driving motor (10), the output end of the clamping driving motor (10) is connected with a second transmission gear (11), and the second transmission gear (11) is meshed with the transmission toothed ring (8).

6. The novel connecting device according to claim 2, wherein the connecting piece comprises a first sliding plate (12), a first bolt (14) and a limiting block (15), the first sliding plate (12) is fixed at two ends of the connecting plate (4), the first sliding plate (12) is in sliding connection with the positioning plate (3), the limiting block (15) is in sliding connection with the inside of the positioning plate (3), the limiting block (15) is in sliding connection with the first sliding plate (12), the first bolt (14) is rotationally connected to the inner side of the positioning plate (3), and the outer side of one end of the first bolt (14) is in threaded connection with the limiting block (15).

7. The novel connecting device according to claim 6, wherein a second sliding plate (13) is fixed on the two sides of the connecting plate (4) and positioned on the top of the first sliding plate (12), and the second sliding plate (13) is in sliding connection with the positioning plate (3).

8. The novel connecting device according to claim 2, wherein the connecting piece comprises a third sliding plate (16), a positioning block (17) and a return spring (18), the third sliding plate (16) is fixed at two ends of the connecting plate (4), the third sliding plate (16) is slidably connected with the positioning plate (3), the positioning block (17) is slidably connected with the inside of the top end and the bottom end of the third sliding plate (16), the positioning block (17) is slidably connected with the positioning plate (3), and the return spring (18) is fixed at the bottom of the positioning block (17) and inside of the third sliding plate (16).

9. The novel connecting device according to claim 8, wherein an inclined surface is formed at one end of the top of the positioning block (17) far away from the connecting plate (4).

10. A new connection device according to claim 8, characterized in that the positioning plate (3) is internally threaded with a second bolt (19).