CN220271626U - Multi-core optical fiber plug - Google Patents

Abstract

The utility model discloses a multi-core optical fiber plug, which relates to the technical field of optical fiber accessories and comprises an outer shell, an optical fiber protection unit and a plug mounting unit; the rear end of the outer shell is inserted with a multi-core optical fiber main body; the optical fiber protection unit comprises a first installation groove, an installation sliding block, a protection sleeve and a sliding thin rod, wherein the first installation groove is formed in the rear side of the upper end of the outer shell, the installation sliding block is connected in the first installation groove in a sliding manner, and the front section and the rear section of the protection sleeve which are perpendicular to the end face are fixedly connected on the end face of the installation sliding block; the plug mounting unit is mounted at the front end of the outer housing. The utility model can effectively protect the multi-core optical fiber main body and prevent the multi-core optical fiber main body from being broken by stress, thereby ensuring the stability of signal transmission.

Description

Multi-core optical fiber plug

Technical Field

The utility model relates to the technical field of optical fiber accessories, in particular to a multi-core optical fiber plug.

Background

The optical fiber is a short-term optical fiber, is a fiber made of glass or plastic, can be used as an optical conduction tool, and has the principle of total reflection of light and higher signal transmission rate; the multi-core optical fiber is one of optical fiber wires, a plurality of fiber cores exist in a common cladding region, and for the multi-core optical fiber, an optical fiber plug is one of important parts for keeping stable splicing and stable signal transmission;

the utility model provides a multicore fiber plug that authority bulletin number CN217425761U was published among the prior art, belongs to photoelectricity technical field, including the plug shell, and be fixed in plug main part in the plug shell, the one end of plug shell is equipped with the opening, and the opening supplies the exposure of plug main part tip, just be provided with gliding movable section of thick bamboo in the plug shell, movable section of thick bamboo elastic mounting is on the both sides inner wall of plug shell, movable section of thick bamboo cover in the tip of plug main part, the one end of movable section of thick bamboo stretches out outside the port of plug shell to be fixed with a plurality of dust proof sheets, a plurality of the middle part of dust proof sheet forms the round hole jointly, the round hole supplies the spliced pole of plug main part tip passes. The multi-core optical fiber plug can protect the end part of the plug main body to a certain degree in order to avoid that the plug main body is directly exposed in the air to adsorb a large amount of dust when not in use, thereby being beneficial to ensuring the normal use of equipment;

the designed optical fiber connector has a dustproof effect, but lacks of anti-pulling protection on the optical fiber, the connector is loosened due to pulling of external force, and even a line is broken, so that transmission of network signals is failed, and for transmission of the network signals, stable plug connection of a plug part is a key of stable signal transmission, therefore, the multi-core optical fiber plug is provided.

Disclosure of Invention

The utility model aims to overcome the existing defects, and provides a multi-core optical fiber plug which is provided with a reliable optical fiber protection unit, can effectively protect a multi-core optical fiber main body and prevent the multi-core optical fiber main body from being broken by stress, thereby ensuring the stability of signal transmission.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a multi-core optical fiber plug comprises an outer shell, an optical fiber protection unit and a plug mounting unit;

an outer shell: the optical fiber is of a cuboid structure, chamfers are arranged on the left side and the right side of the lower end of the optical fiber, and a multi-core optical fiber main body is inserted into the rear end of the outer shell;

optical fiber protection unit: the multi-core optical fiber comprises a first mounting groove, a first mounting sliding block, a protective sleeve, a first mounting sliding rod, a second connecting sliding rod, a spring and a thin sliding rod, wherein the first mounting groove is arranged at the rear side of the upper end of the outer shell, the first mounting groove is internally and slidably connected with a square first mounting sliding block, the end face of the first mounting sliding block is fixedly connected with a front section of protective sleeve and a rear section of protective sleeve which are perpendicular to the end face, the multi-core optical fiber main body penetrates through the protective sleeve from the inside, the protective sleeve at the rear side of the first mounting sliding block is slidably connected with the rear end of the outer shell, the circumference array at the port of the front side of the installation slide block is fixedly connected with a plurality of sliding thin rods, the sliding thin rods are in sliding connection with the inside of the outer shell, the middle position of the upper port of the installation groove I is fixedly connected with a longitudinal installation slide rod, the connection slide block is in sliding connection with the outer side of the installation slide rod, the lower end of the connection slide block is fixedly connected with the upper side of the installation slide block, and springs are sleeved in the inside of the installation groove I and positioned on the outer sides of the protection sleeve and the sliding thin rods;

plug mounting unit: is arranged at the front end of the outer shell.

The outer shell body is used for protecting the whole plug, the multicore optical fiber main body is used for the transmission of optical fiber signals, the mounting groove is used for the installation of installation slider, the connection slider is used for sliding connection between installation slider and the installation slide bar, thereby make the installation slider slide along installation slide bar back and forth, the installation slider is used for protecting the sheathed tube installation, the protection sleeve cup joints in the outside of multicore optical fiber main body, protect the multicore optical fiber main body, the spring of installing in the outside of protection sleeve and slip joint slender rod exerts an elasticity for the installation slider, thereby make the installation slider can outwards push out the protection sleeve all the time, protect the position department that multicore optical fiber main body pegged graft with the outer shell body, the slip joint slender rod is used for preventing that the multicore optical fiber main body from colliding with the spring when stretching into the protection sleeve, plug installation unit is used for the grafting installation at optical fiber plug position.

Further, the optical fiber protection unit further comprises a locking rubber sleeve and a fastening wire ring, the end part of the rear side of the protection sleeve is fixedly connected with the locking rubber sleeve, an annular inner groove is formed in the outer ring side of the locking rubber sleeve, and a plurality of rings of fastening wire rings are wound in the inner groove. The locking rubber sleeve fixes the protection sleeve and the outer part of the multi-core optical fiber main body through tightening action of the fastening wire ring, so that force can be acted on the installation sliding block when the multi-core optical fiber main body is pulled outside, connection tightness between the multi-core optical fiber main body and the outer shell body is further maintained, and stability of signal transmission is guaranteed.

Further, the plug installation unit contains inserted block, side catching groove, fixed fixture block, interface groove and electrode chip board, the equal fixedly connected with square fixed fixture block in the left and right sides of inserted block, square side catching groove has all been seted up in the middle part position department before the outer shell body left and right sides, fixed fixture block detains in the inside in side catching groove, the front port cartridge of outer shell body has the same inserted block with outer shell body cross-section shape, the interface groove has been seted up to the inside of inserted block, the internally mounted in interface groove is fixed with horizontal electrode chip board, the inner and the front end electricity of multicore optic fibre main part of electrode chip board are connected. The inserted block is used for being inserted with an external port, the chamfer structures on two sides enable the inserted block to be clamped with the external port more tightly, the fixed clamping block is used for being clamped with the side buckling groove, the inserted block is limited and fixed, the interface groove is used for installing an electrode plate, and the electrode plate is connected with a conducting plate of the external port, so that signal transmission is achieved.

Further, the plug installation unit further comprises a second installation groove and an elastic buckle, wherein the second installation groove is formed in the middle position of the upper side of the front end of the outer shell, and the elastic buckle which is inclined backwards is fixedly connected to the inside of the second installation groove. The second mounting groove is used for mounting the elastic buckle, and when the optical fiber plug is inserted, the elastic buckle can be pressed in the second mounting groove by force, and the elastic buckle can be restored to a tilting state after the plug is inserted tightly, so that the effect of a return hook is achieved, the tightness of connection between the optical fiber plug and an external port is improved, and an operator can push the optical fiber plug out conveniently.

Further, the plug installation unit further comprises a third installation groove and a transparent observation plate, the third square installation groove is formed in the position, close to the front, of the middle of the upper end of the outer shell, and the transparent observation plate is embedded in the third installation groove. The three-purpose installation of the mounting groove is used for the installation of the transparent observation plate, and the transparent observation plate is convenient for observing the connection effectiveness of the inner end of the electrode plate and the front end of the multi-core optical fiber main body so as to carry out fault diagnosis work of signal transmission.

Further, the sealing device further comprises a sealing cover plate and sealing rubber strips, wherein the upper end of the first mounting groove is fixedly connected with two sealing cover plates, the sealing cover plates are respectively arranged on the left side and the right side of the mounting sliding rod, and the sealing rubber strips are filled in gaps between each sealing cover plate and the mounting sliding rod. The sealing cover plate is used for sealing the upper port of the first mounting groove, and the sealing rubber strip is used for filling and sealing a gap between the sealing cover plate and the mounting sliding rod.

Compared with the prior art, the utility model has the beneficial effects that: the multi-core optical fiber plug has the following advantages:

1. the multi-core optical fiber protection device has the advantages that the multi-core optical fiber protection device is reliable in optical fiber protection unit, the multi-core optical fiber main body can be effectively protected, the multi-core optical fiber main body is prevented from being broken by stress, and therefore stability of signal transmission is guaranteed: the connecting slide block is used for sliding connection between the installing slide block and the installing slide bar, so that the installing slide block can slide back and forth along the installing slide bar, the installing slide block is used for installing a protective sleeve, the protective sleeve is sleeved on the outer side of the multi-core optical fiber main body, a spring arranged on the outer sides of the protective sleeve and the sliding thin rod applies an elastic force to the installing slide block, so that the installing slide block can always eject the protective sleeve outwards to protect the position where the multi-core optical fiber main body is spliced with the outer shell, and the locking rubber sleeve fixes the protective sleeve and the outer part of the multi-core optical fiber main body through tightening action of the fastening wire ring, so that when the multi-core optical fiber main body is pulled by the outside, the force is applied to the installing slide block, the connecting tightness between the multi-core optical fiber main body and the outer shell is further maintained, and the stability of signal transmission is ensured;

2. the plug mounting device has the advantages that the reliable plug mounting unit is arranged, the mounting stability of a plug part can be ensured, the effective limit between the plug part and an external port can be maintained, and the plug-in and plug-out process of a plug is facilitated: the inserting block is used for being inserted into the external port, the chamfer structures on the two sides enable the clamping of the inserting block and the external port to be tighter, and the fixing clamping block is used for being clamped with the side buckling groove, so that the inserting block is limited and fixed; the second mounting groove is used for mounting the elastic buckle, and when the optical fiber plug is inserted, the elastic buckle can be pressed in the second mounting groove under force, and the elastic buckle can be restored to a tilting state after the plug is inserted tightly, so that the effect of back hooking is achieved, the tightness of connection between the optical fiber plug and an external port is improved, and an operator can conveniently press the optical fiber plug by hand to pull out the plug;

3. the utility model has a reliable optical fiber protection unit, can effectively protect the multi-core optical fiber main body, and prevent the multi-core optical fiber main body from being broken under the stress, thereby ensuring the stability of signal transmission.

Drawings

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

FIG. 2 is a schematic view of a rear side partial structure of the present utility model;

fig. 3 is a schematic view of the upper partial structure of the present utility model.

In the figure: the optical fiber module comprises a 1 outer shell, a 2 multi-core optical fiber main body, a 3 optical fiber protection unit, a 31 installation groove I, a 32 installation slide block, a 33 protection sleeve, a 34 installation slide bar, a 35 connection slide block, a 36 spring, a 37 sliding connection thin rod, a 38 locking rubber sleeve, a 39 fastening wire ring, a 4 plug installation unit, a 41 plug block, a 42 side buckling groove, a 43 fixing clamping block, a 44 interface groove, a 45 electrode plate, a 46 installation groove II, a 47 elastic buckle, a 48 installation groove III, a 49 transparent observation plate, a 5 sealing cover plate and a 6 sealing rubber strip.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the present embodiment provides a technical solution: a multi-core optical fiber plug comprises an outer shell 1, an optical fiber protection unit 3 and a plug mounting unit 4;

outer casing 1: the optical fiber is of a cuboid structure, chamfer angles are arranged on the left side and the right side of the lower end, and the multi-core optical fiber main body 2 is inserted into the rear end of the outer shell 1;

optical fiber protection unit 3: comprises a first mounting groove 31, a mounting slide block 32, a protective sleeve 33, a mounting slide bar 34, a connecting slide block 35, a spring 36 and a sliding thin rod 37, wherein the rear side of the upper end of the outer shell 1 is provided with the first mounting groove 31, the inside of the first mounting groove 31 is connected with a square mounting slide block 32 in a sliding way, the end face of the mounting slide block 32 is fixedly connected with a front section and a rear section of the protective sleeve 33 which are vertical to the end face, the multicore optical fiber main body 2 passes through the inside of the protective sleeve 33, the protective sleeve 33 at the rear side of the mounting slide block 32 is connected with the rear end of the outer shell 1 in a sliding way, the circumference array at the front side port of the installation slide block 32 is fixedly connected with a plurality of sliding thin rods 37, the sliding thin rods 37 are in sliding connection with the inside of the outer shell 1, the middle position of the upper port of the installation groove I31 is fixedly connected with a longitudinal installation slide rod 34, the connection slide block 35 is in sliding connection with the outer side of the installation slide rod 34, the lower end of the connection slide block 35 is fixedly connected with the upper side of the installation slide block 32, and a spring 36 is sleeved in the inside of the installation groove I31 and positioned outside the protection sleeve 33 and the sliding thin rods 37;

plug mounting unit 4: is mounted at the front end of the outer housing 1.

The outer shell 1 is used for protecting the whole plug, the multicore fiber main body 2 is used for transmitting fiber signals, the first mounting groove 31 is used for mounting the sliding block 32, the connecting sliding block 35 is used for sliding connection between the sliding block 32 and the mounting sliding rod 34, accordingly, the sliding block 32 can slide back and forth along the mounting sliding rod 34, the sliding block 32 is used for mounting the protection sleeve 33, the protection sleeve 33 is sleeved on the outer side of the multicore fiber main body 2, the multicore fiber main body 2 is protected, the spring 36 mounted on the outer side of the protection sleeve 33 and the sliding connection thin rod 37 applies an elastic force to the sliding block 32, accordingly, the sliding block 32 can always push the protection sleeve 33 outwards to protect the position where the multicore fiber main body 2 is spliced with the outer shell 1, the sliding connection thin rod 37 is used for preventing the multicore fiber main body 2 from colliding with the spring 36 when extending into the protection sleeve 33, and the plug mounting unit 4 is used for mounting the fiber plug part.

The optical fiber protection unit 3 comprises a locking rubber sleeve 38 and a fastening wire ring 39, the end part of the rear side of the protection sleeve 33 is fixedly connected with the locking rubber sleeve 38, an annular inner groove is formed in the outer ring side of the locking rubber sleeve 38, and a plurality of rings of fastening wire rings 39 are wound in the inner groove. The locking rubber sleeve 38 fixes the protection sleeve 33 and the outer part of the multi-core optical fiber main body 2 through tightening action of the fastening wire ring 39, so that when the multi-core optical fiber main body 2 is pulled outside, force acts on the mounting sliding block 32, connection tightness between the multi-core optical fiber main body 2 and the outer shell 1 is further maintained, and stability of signal transmission is ensured.

The plug installation unit 4 comprises an inserting block 41, side buckling grooves 42, fixing clamping blocks 43, an interface groove 44 and an electrode plate 45, wherein the square fixing clamping blocks 43 are fixedly connected to the left side and the right side of the inserting block 41, the square side buckling grooves 42 are formed in the positions, close to the front, of the middle of the left side and the right side of the outer shell body 1, the fixing clamping blocks 43 are buckled in the side buckling grooves 42, the inserting block 41 with the same cross section shape as the outer shell body 1 is inserted into the front port of the outer shell body 1, the interface groove 44 is formed in the inserting block 41, the transverse electrode plate 45 is fixedly arranged in the interface groove 44, and the inner end of the electrode plate 45 is electrically connected with the front end of the multi-core optical fiber main body 2. The insert 41 is used for being inserted with an external port, the chamfer structures on two sides enable the insert to be clamped with the external port more tightly, the fixing clamping block 43 is used for being clamped with the side buckling groove 42, the insert 41 is limited and fixed, the interface groove 44 is used for mounting the electrode plate 45, and the electrode plate 45 is connected with a conducting plate of the external port, so that signal transmission is achieved.

The plug mounting unit 4 further comprises a second mounting groove 46 and an elastic buckle 47, wherein the second mounting groove 46 is formed in the middle position of the upper side of the front end of the outer shell 1, and the elastic buckle 47 which is inclined backwards is fixedly connected to the inside of the second mounting groove 46. The second mounting groove 46 is used for mounting the elastic buckle 47, and when the optical fiber plug is inserted, the elastic buckle 47 can be pressed inside the second mounting groove 46 by force, and the elastic buckle 47 can be restored to a tilting state after the plug is inserted tightly, so that the effect of a return hook is achieved, the tightness of connection between the optical fiber plug and an external port is improved, and an operator can push the optical fiber plug out conveniently.

The plug mounting unit 4 further comprises a mounting groove III 48 and a transparent observation plate 49, wherein the square mounting groove III 48 is formed in the position, close to the front, of the middle of the upper end of the outer shell 1, and the transparent observation plate 49 is embedded in the mounting groove III 48. The third mounting groove 48 is used for mounting a transparent observation plate 49, and the transparent observation plate 49 is convenient for observing the connection effectiveness of the inner end of the electrode plate 45 and the front end of the multi-core optical fiber main body 2 so as to perform fault diagnosis work of signal transmission.

The sealing device further comprises a sealing cover plate 5 and sealing rubber strips 6, wherein the upper end of the first mounting groove 31 is fixedly connected with the two sealing cover plates 5, the sealing cover plates 5 are respectively arranged on the left side and the right side of the mounting slide rod 34, and the sealing rubber strips 6 are filled in gaps between each sealing cover plate 5 and the mounting slide rod 34. The sealing cover plate 5 is used for sealing the upper port of the first mounting groove 31, and the sealing rubber strip 6 is used for filling and sealing a gap between the sealing cover plate 5 and the mounting slide rod 34.

The working principle of the multi-core optical fiber plug provided by the utility model is as follows: the optical fiber plug is provided with the reliable optical fiber protection unit 3, so that the multi-core optical fiber main body 2 can be effectively protected, the multi-core optical fiber main body 2 is prevented from being broken by stress, and the stability of signal transmission is ensured: the first mounting groove 31 is used for mounting the sliding block 32, the connecting sliding block 35 is used for sliding connection between the sliding block 32 and the mounting sliding rod 34, so that the mounting sliding block 32 can slide back and forth along the mounting sliding rod 34, the mounting sliding block 32 is used for mounting the protective sleeve 33, the protective sleeve 33 is sleeved on the outer side of the multicore fiber main body 2, the multicore fiber main body 2 is protected, the spring 36 mounted on the outer side of the protective sleeve 33 and the sliding connection thin rod 37 applies an elastic force to the mounting sliding block 32, so that the mounting sliding block 32 can always push the protective sleeve 33 outwards to protect the position where the multicore fiber main body 2 is spliced with the outer shell 1, the sliding connection thin rod 37 is used for preventing the multicore fiber main body 2 from colliding with the spring 36 when the multicore fiber main body 2 stretches into the protective sleeve 33, the locking rubber sleeve 38 fixes the protective sleeve 33 with the outer side of the multicore fiber main body 2 through tightening action of the fastening wire ring 39, and accordingly when the multicore fiber main body 2 is pulled outwards, the connecting tightness between the multicore fiber main body 2 and the outer shell 1 is kept, and stability of signal transmission is guaranteed. The optical fiber plug is also provided with a reliable plug installation unit 4, so that the installation stability of a plug part can be ensured, the effective limit between the plug part and an external port can be maintained, and the plug process of the plug is convenient: the insert block 41 is used for being inserted into an external port, the chamfer structures on two sides can enable the insert block to be clamped with the external port more tightly, and the fixed clamping block 43 is used for being clamped with the side buckling groove 42, so that the insert block 41 is limited and fixed; the second mounting groove 46 is used for mounting the elastic buckle 47, and when the optical fiber plug is inserted, the elastic buckle 47 can be pressed inside the second mounting groove 46 by force, and the elastic buckle 47 can be restored to a tilting state after the plug is inserted tightly, so that the effect of a return hook is achieved, the tightness of connection between the optical fiber plug and an external port is improved, and an operator can push the optical fiber plug out conveniently. In addition, the transparent observation plate 49 is convenient for observing the effectiveness of connection between the inner end of the electrode plate 45 and the front end of the multi-core optical fiber main body 2 so as to perform fault diagnosis work of signal transmission, the sealing cover plate 5 is used for sealing the upper port of the first mounting groove 31, and the sealing adhesive tape 6 is used for filling and sealing a gap between the sealing cover plate 5 and the mounting slide bar 34.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims (6)

1. A multi-core optical fiber plug, characterized in that: comprises an outer shell (1), an optical fiber protection unit (3) and a plug mounting unit (4);

outer casing (1): the optical fiber is of a cuboid structure, chamfer angles are arranged on the left side and the right side of the lower end of the optical fiber, and a multi-core optical fiber main body (2) is inserted into the rear end of the outer shell (1);

optical fiber protection unit (3): comprises a first mounting groove (31), a mounting sliding block (32), a protective sleeve (33), a mounting sliding rod (34), a connecting sliding block (35), a spring (36) and a sliding thin rod (37), wherein the rear side of the upper end of the outer shell (1) is provided with the first mounting groove (31), a square installation sliding block (32) is connected in the installation groove I (31) in a sliding way, a front section and a rear section of protection sleeve (33) perpendicular to the end face are fixedly connected on the end face of the installation sliding block (32), the multi-core optical fiber main body (2) passes through the inside of the protection sleeve (33), the protective sleeve (33) at the rear side of the installation slide block (32) is in sliding connection with the rear end of the outer shell (1), a plurality of sliding thin rods (37) are fixedly connected at the circumferential array at the port at the front side of the installation slide block (32), the sliding thin rods (37) are in sliding connection with the inside of the outer shell (1), a longitudinal installation slide bar (34) is fixedly connected at the middle position of the port on the first installation groove (31), the connection slide block (35) is in sliding connection with the outer side of the installation slide bar (34), the lower end of the connection slide block (35) is fixedly connected with the upper side of the installation slide block (32), a spring (36) is sleeved in the first mounting groove (31) and positioned outside the protective sleeve (33) and the sliding thin rod (37);

plug mounting unit (4): is arranged at the front end of the outer shell (1).

2. A multi-core optical fiber plug as claimed in claim 1, wherein: the optical fiber protection unit (3) further comprises a locking rubber sleeve (38) and a fastening wire ring (39), the locking rubber sleeve (38) is fixedly connected to the end part of the rear side of the protection sleeve (33), an annular inner groove is formed in the outer ring side of the locking rubber sleeve (38), and a plurality of rings of fastening wire rings (39) are wound in the inner groove.

3. A multi-core optical fiber plug as claimed in claim 1, wherein: the plug installation unit (4) comprises an inserting block (41), side buckling grooves (42), fixing clamping blocks (43), interface grooves (44) and electrode sheet plates (45), the left side and the right side of the inserting block (41) are fixedly connected with square fixing clamping blocks (43), square side buckling grooves (42) are formed in the positions, which are located in front of the middle of the left side and the right side of the outer shell body (1), of the fixing clamping blocks (43) are buckled in the side buckling grooves (42), the inserting block (41) with the same cross section shape as the outer shell body (1) is inserted into the front port of the outer shell body (1), the interface grooves (44) are formed in the inserting block (41), the transverse electrode sheet plates (45) are fixedly arranged in the interface grooves (44), and the inner ends of the electrode sheet plates (45) are electrically connected with the front end of the multi-core optical fiber main body (2).

4. A multi-core optical fiber plug as claimed in claim 3, wherein: the plug installation unit (4) further comprises a second installation groove (46) and an elastic buckle (47), the middle position of the upper side of the front end of the outer shell body (1) is provided with the second installation groove (46), and the inside of the second installation groove (46) is fixedly connected with the elastic buckle (47) obliquely backwards.

5. A multi-core optical fiber plug as claimed in claim 4, wherein: the plug installation unit (4) further comprises a third installation groove (48) and a transparent observation plate (49), the third square installation groove (48) is formed in the position, close to the front, of the middle of the upper end of the outer shell (1), and the transparent observation plate (49) is embedded in the third installation groove (48).

6. A multi-core optical fiber plug as claimed in claim 1, wherein: the sealing device is characterized by further comprising a sealing cover plate (5) and sealing rubber strips (6), wherein the upper end of the first mounting groove (31) is fixedly connected with two sealing cover plates (5), the sealing cover plates (5) are respectively arranged on the left side and the right side of the mounting slide rod (34), and the sealing rubber strips (6) are filled in gaps between each sealing cover plate (5) and the mounting slide rod (34).