CN215641139U

CN215641139U - Install intelligent detection device on municipal bridge

Info

Publication number: CN215641139U
Application number: CN202121929123.5U
Authority: CN
Inventors: 王兴林
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-01-25
Anticipated expiration: 2031-08-17

Abstract

The utility model provides an intelligent detection device installed on a municipal bridge, relates to the field of detection devices, and aims to solve the problems that the existing intelligent detection device cannot automatically position a detection position, cannot automatically contact with the detection position, and cannot automatically trigger the displacement of a detection head after installation when in use; the main part is T shape structure, and the top both sides of main part are cylindrical structure, and the moving member is installed to the bottom of main part, the moving member is the rectangle frame structure, and the front end of moving member is equipped with intelligent wireless solar energy detection instrument, and the detecting head is installed to the rear end of moving member, intelligent wireless solar energy detection instrument and detecting head electric connection. The main part inserts outside the piece inside later plug-in components automatic insertion suitable position's atress inslot portion, makes the atress groove atress, and then promotes the carriage release lever rebound, makes the carriage release from the draw-in groove is inside, makes the moving member receive spring power and drives detection instrument and detecting head displacement.

Description

Install intelligent detection device on municipal bridge

Technical Field

The utility model belongs to the technical field of detection devices, and particularly relates to an intelligent detection device installed on a municipal bridge.

Background

Municipal bridge is after the construction finishes, owing to often the vehicle passes through, so the fracture appears easily, at this moment just needs to use intelligent detection device, and then installs and continuously detect on municipal bridge and detect a flaw.

For example, application No.: CN201921999543.3 relates to bridge structure damage detection equipment, which comprises an elastic buckle bowl, a mounting bracket and a positioning bracket; the elastic buckle bowl comprises a bowl body, a fixing edge is arranged on the extension of the bowl body, and a plurality of fixing holes for connecting with the bridge body are uniformly formed in the fixing edge; the mounting bracket comprises four supporting bodies, the four supporting bodies are fixed on the inner wall of the elastic buckling bowl, and the supporting bodies are provided with at least one connecting claw for fixing the detecting instrument; the locating support is the support bar of setting between the supporter, the support bar is fixed on the elasticity detains the bowl inner wall, be provided with at least one spacing elastic column on the support bar, the problem that the fault detection equipment stability that causes when lightening bridge body vibrations is not enough is alleviateed.

The existing intelligent detection device is not convenient enough to install when in use, cannot be conveniently and fixedly installed on a bridge, cannot automatically position and detect the position when in use, cannot automatically contact with the detection position, and cannot automatically trigger the displacement of the detection head after installation.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides an intelligent detection device installed on a municipal bridge, and aims to solve the problems that the existing intelligent detection device is not convenient to install and cannot be installed and fixed on the bridge conveniently when being used, and the existing intelligent detection device cannot automatically position a detection position, cannot automatically contact with the detection position, and cannot automatically trigger the displacement of a detection head after being installed when being used.

The utility model relates to an intelligent detection device installed on a municipal bridge, which is realized by the following specific technical means:

an intelligent detection device installed on a municipal bridge, comprising: a main body; the solar mobile comprises a main body, a detection head, a moving piece, a base piece, a detection head and a base piece, wherein the main body is of a T-shaped structure, two sides of the top end of the main body are cylindrical structures, the bottom of the main body is provided with the moving piece, the moving piece is of a rectangular frame structure, the front end of the moving piece is provided with an intelligent wireless solar detection instrument, the rear end of the moving piece is provided with the detection head, the intelligent wireless solar detection instrument is electrically connected with the detection head, and the top end of the moving piece is inserted into the rectangular groove of the base piece; support piece, support piece's front end is equipped with the rectangular channel, and support piece's front end is equipped with pushing mechanism, and support piece is rectangular plate-shaped structure, and support piece's rear end bottom is equipped with the wedge, and support piece's top is equipped with two round bars, and the round bar is middle bellied cylindrical structure, and the bottom outside cover of round bar is equipped with the spring.

Further, the body includes: the limiting grooves are of rectangular structures and are uniformly arranged on two sides of the front end of the main body; the sliding chute is of a T-shaped structure and is arranged inside the rear side of the main body; the main body further includes: the movable rod is of an L-shaped structure, the section of the middle position of the movable rod is of a T-shaped structure, the movable rod is embedded into the sliding groove, the bottom of the movable rod is of a wedge-shaped structure, the movable rod is internally provided with uniformly-arranged stress grooves, the stress grooves are of a rectangular structure, and an inclined structure is arranged above the rear end of each stress groove; the main body further includes: the bottom piece is of a pentagonal structure, a rectangular groove is formed in the bottom piece, wedge-shaped blocks are arranged at the front end and the rear end of the bottom piece respectively, a guide piece is arranged at the front end of the bottom piece, the top end of the guide piece is of an L-shaped structure, the bottom of the guide piece is of a cylindrical structure, and a spring is sleeved on the outer side of the bottom of the guide piece.

Further, the moving member includes: the clamping groove is of a wedge-shaped structure and is arranged behind the top end of the moving piece, and the bottom of the moving rod is inserted into the clamping groove; the stress plate is of a rectangular plate-shaped structure, the stress plate is installed in front of the top end of the moving part, a round hole is formed in the top end of the stress plate, the bottom of the guide piece is inserted into the round hole, and the front end of the stress plate is in contact with the rear end of the spring.

Further, the support member includes: the fixing plate is of a rectangular plate-shaped structure, four fixing holes are formed in the fixing plate, the fixing plate is fixed at the rear end of the supporting piece, a rectangular through groove is formed in the middle of the inside of the fixing plate, and two T-shaped through grooves are formed in two sides of the fixing plate respectively; the outer part is of a U-shaped structure and is arranged at the front end of the supporting part, two rectangular grooves are respectively formed in two sides of the front end of the outer part, two rectangular plates are respectively arranged at two ends of the outer part, a round rod with a middle protruding cylindrical structure is respectively arranged at two ends of each rectangular plate, a spring is sleeved on the outer side of each round rod, a limiting part is arranged in each rectangular groove of the outer part, each limiting part is of a T-shaped structure, an inclined structure is arranged in front of the inner end of each limiting part, round holes are formed in the upper side and the lower side of the outer end of each limiting part, the round rods are inserted into the round holes, an insert is arranged in the outer part, and the front end of the insert is of a wedge-shaped structure; the support member further includes: the pushing plate is of a rectangular plate-shaped structure, the front end of the pushing plate is of a wedge-shaped structure, two round holes are formed in the pushing plate, a round rod at the top end of a supporting piece is inserted into each round hole, the bottom of the pushing plate is contacted with the top end of a spring outside the round rod, an inserting plate is arranged at the rear end of the pushing plate and is of a rectangular structure, a rectangular plate is arranged in the middle of the inserting plate, the cross section of the side edge of the inserting plate is of a T-shaped structure, and the inserting plate and the rectangular plate are respectively inserted into a rectangular through groove and a T-shaped through groove of a fixing plate; the pushing mechanism includes: the ejector pad, the ejector pad is L shape structure, and the rear end of ejector pad is the wedge structure, and the bottom of ejector pad is equipped with the slider, and the slider is T shape structure, and the top of slider inserts in the rectangular channel of support piece front end inside.

Compared with the prior art, the utility model has the following beneficial effects:

1. in the device, a supporting piece is arranged and is used for being fixed on a bridge in advance, so that after the supporting piece is fixed, a main body can be directly controlled to be installed on the bridge, the main body can be embedded into an external piece, a limiting piece can be pushed to move outwards while being embedded, the limiting piece can compress a spring, after the main body is completely embedded, the limiting piece can be pushed to reset by the spring, the limiting piece can be embedded into a limiting groove, the main body is further fixed conveniently, the main body can conveniently drive the moving piece and a detecting instrument to be installed, after the main body is embedded, a top block can be pushed to move, the top block can enable a pushing plate to move downwards, an inserting plate can further move downwards in a rectangular through groove and a T-shaped through groove of a fixing plate, the distance of the inserting plate can be adjusted, the supporting piece is further strengthened, and after a fixing screw of the supporting piece is loosened, the fixing can be strengthened through the inserting plate;

2. in this device, the carriage release lever has been set up, after the main part was embedded into the outer part inside, can make plug-in components automatically insert the stress inslot of suitable position, because the front end of plug-in components is the wedge structure, the rear top of stress groove is the slope column structure simultaneously, make plug-in components insert after the stress inslot is inside, can make the stress groove atress, and then promote the carriage release lever rebound, make the carriage release lever can follow the inside separation of draw-in groove, make the moving member can relieve spacingly, and then receive spring power and drive detecting instrument and detecting head displacement, make the detecting head stop the removal again after contacting with the detection position, make this device can the automatic positioning survey the position, make the detecting head can be triggered the displacement by the automation, make the staff when can't seeing the detection position, also can effectually survey.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is an exploded perspective view of the present invention.

Fig. 3 is a schematic exploded view of the main body of the present invention.

Fig. 4 is a perspective view of the support member of the present invention.

Fig. 5 is an exploded perspective view of the support member of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a main body; 101. a limiting groove; 102. a chute; 103. a travel bar; 104. a stress groove; 105. a bottom piece; 106. a guide; 2. a moving member; 201. a card slot; 202. a stress plate; 3. a support member; 301. a fixing plate; 302. an outer piece; 303. a limiting member; 304. a plug-in; 305. a push plate; 306. inserting plates; 307. a top block; 308. a slide block.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 5:

the utility model provides an intelligent detection device installed on a municipal bridge, which comprises a main body 1; the main body 1 is of a T-shaped structure, two sides of the top end of the main body 1 are of cylindrical structures, the moving member 2 is installed at the bottom of the main body 1, the moving member 2 is of a rectangular frame structure, the moving member 2 plays a role in driving a detecting instrument and a detecting head to move, so that the detecting head can be contacted with a detection position, the intelligent wireless solar energy detecting instrument is arranged at the front end of the moving member 2, the detecting head is installed at the rear end of the moving member 2, the intelligent wireless solar energy detecting instrument is electrically connected with the detecting head, and the top end of the moving member 2 is inserted into a rectangular groove of the bottom piece 105; support piece 3, support piece 3's front end is equipped with the rectangular channel, support piece 3's front end is equipped with pushing mechanism, support piece 3 is rectangular plate-shaped structure, support piece 3's rear end bottom is equipped with the wedge, support piece 3's top is equipped with two round bars, the round bar is middle bellied cylindrical structure, the bottom outside cover of round bar is equipped with the spring, support piece 3 has played fixed mounting's effect in advance, and then makes main part 1 when the installation, can convenient fixed mounting.

As shown in fig. 4 and 5, the support 3 further includes: a pushing plate 305, the pushing plate 305 is a rectangular plate-shaped structure, the front end of the pushing plate 305 is a wedge-shaped structure, the pushing plate 305 can make the top block 307 displace after the main body 1 is connected with the supporting piece 3, so that the pushing plate 305 can be forced to move downwards, two round holes are arranged inside the pushing plate 305, a round rod at the top end of the supporting piece 3 is inserted into the round holes, the bottom of the pushing plate 305 is contacted with the top end of a spring outside the round rod, an inserting plate 306 is arranged at the rear end of the pushing plate 305, after the pushing plate 305 moves downwards, the insert plate 306 can be moved downward inside the rectangular through groove and the T-shaped through groove of the fixing plate 301, the fixing plate 301 is supported in an auxiliary mode, so that the supporting member 3 is more stable after being installed, the inserting plate 306 is of a rectangular structure, a rectangular plate is arranged in the middle of the inserting plate 306, the cross section of the side edge of the inserting plate 306 is of a T-shaped structure, and the inserting plate 306 and the rectangular plate are respectively inserted into the rectangular through groove and the T-shaped through groove of the fixing plate 301; the pushing mechanism includes: the kicking block 307, the kicking block 307 is L shape structure, the rear end of kicking block 307 is the wedge structure, the kicking block 307 has played the effect of receiving the power displacement of main part 1, and then contact through rear end and pushing plate 305, make pushing plate 305 can atress displacement, the bottom of kicking block 307 is equipped with slider 308, slider 308 is T shape structure, the top of slider 308 is inserted inside the rectangular channel of support piece 3 front end, slider 308 has played the effect of installing the inside removal in the rectangular channel of support piece 3, and then make slider 308 and kicking block 307 can the guide displacement.

As shown in fig. 2 and 3, wherein the main body 1 includes: the limiting groove 101 is of a rectangular structure, the limiting grooves 101 are uniformly arranged and arranged on two sides of the front end of the main body 1, and after the main body 1 is embedded into the outer piece 302, the limiting groove 101 enables the limiting piece 303 to be inserted into the limiting groove 101, so that the main body 1 can be fixed, the main body 1 cannot slide, and stable detection is performed; a sliding groove 102, wherein the sliding groove 102 is of a T-shaped structure, the sliding groove 102 is arranged inside the rear side of the main body 1, and the sliding groove 102 plays a role of installing the moving rod 103 so that the moving rod 103 can move inside; the main body 1 further includes: the movable rod 103 is of an L-shaped structure, the section of the middle position of the movable rod 103 is of a T-shaped structure, the movable rod 103 plays a role of moving downwards through self gravity, so that the bottom of the movable rod 103 can be inserted into the clamping groove 201, the moving element 2 can be fixed, the movable rod 103 is embedded into the sliding groove 102, the bottom of the movable rod 103 is of a wedge-shaped structure, the movable rod 103 is internally provided with uniformly-arranged stress grooves 104, the stress grooves 104 are of a rectangular structure, the upper part of the rear end of each stress groove 104 is of an inclined structure, the stress grooves 104 enable the plug-in components 304 to be automatically embedded into the stress grooves 104 after the main body 1 is embedded into the outer piece 302, and the movable rod 103 can be forced to move; the main body 1 further includes: bottom 105, bottom 105 is the pentagon structure, the inside of bottom 105 is equipped with the rectangular channel, bottom 105 has played the effect of direction installation moving member 2, make moving member 2 can horizontal migration, both ends are equipped with a wedge respectively around bottom 105, the front end of bottom 105 is equipped with guide 106, the top of guide 106 is L shape structure, the bottom of guide 106 is cylindrical structure, the bottom outside cover of guide 106 is equipped with the spring, guide 106 has played the effect with the contact of moving member 2 top, and then auxiliary stay moving member 2.

As shown in fig. 2 and 3, wherein the moving member 2 includes: the clamping groove 201 is of a wedge-shaped structure, the clamping groove 201 is arranged behind the top end of the moving element 2, the clamping groove 201 plays a role in limiting and fixing the bottom of the embedded moving rod 103, and the bottom of the moving rod 103 is inserted into the clamping groove 201; the stress plate 202 is of a rectangular plate-shaped structure, the stress plate 202 is installed on the front of the top end of the moving part 2, a round hole is formed in the top end of the stress plate 202, the bottom of the guide part 106 is inserted into the round hole, the front end of the stress plate 202 is contacted with the rear end of the spring, the stress plate 202 plays a role in receiving the power displacement of the spring, and then the probe can be automatically contacted with a detection position.

As shown in fig. 4 and 5, wherein the support 3 includes: the fixing plate 301 is of a rectangular plate-shaped structure, four fixing holes are formed in the fixing plate 301, the fixing plate 301 is fixed at the rear end of the supporting member 3, a rectangular through groove is formed in the middle of the inside of the fixing plate 301, the fixing plate 301 has the effect of being connected with a wall body, the supporting member 3 can be stably installed, and a T-shaped through groove is formed in each of two sides of the fixing plate 301; the outer piece 302 is of a U-shaped structure, the outer piece 302 is arranged at the front end of the support part 3, the outer piece 302 plays a role of being embedded into the installation main body 1, meanwhile, the limiting parts 303 can be installed through springs and round rods, two sides of the front end of the outer piece 302 are respectively provided with a rectangular groove, two ends of the outer piece 302 are respectively provided with a rectangular plate, two ends of each rectangular plate are respectively provided with a round rod with a middle protruding cylindrical structure, the outer side of each round rod is sleeved with a spring, the limiting parts 303 are installed inside the rectangular grooves of the outer piece 302 and are of a T-shaped structure, the limiting parts 303 play a role of receiving the dynamic displacement of the spring and are further inserted into the limiting grooves 101, so that the main body 1 can be fixed, the front part of the inner ends of the limiting parts 303 is of an inclined structure, the upper side and the lower side of the outer ends of the limiting parts 303 are provided with round holes, the round rods are inserted into the round holes, the inner part of the outer piece 302 is provided with the plug-in-part 304, and the front end of the plug-in-piece 304 is of a wedge-shaped structure, the insert 304 functions to be inserted into the force receiving groove 104, thereby allowing the movable rod 103 to be displaced by a force.

When in use: when the device is needed, the support member 3 can be fixed on the bridge in advance through manpower, then the moving rod 103 is pulled to move upwards through manpower, then the moving member 2 is pushed to move forwards, the stress plate 202 can compress the spring, then the moving rod 103 is loosened, the bottom of the moving rod 103 can be inserted into the clamping groove 201, further the moving member 2 can be fixed, then the main body 1 is controlled to move, the main body 1 can be firstly adjusted in height through manpower, then the main body 1 is controlled to be embedded into the outer piece 302, when the main body 1 is embedded, the limiting member 303 can be pushed to move outwards, further the main body 1 can be conveniently embedded into the outer piece 302, then the spring pushes the limiting member 303 to reset, so that the limiting member 303 can be inserted into the limiting groove 101, further the main body 1 is limited and fixed, when the main body 1 is embedded into the outer piece 302, plug-in components 304 atress inserts the inside of atress groove 104 simultaneously, and then make atress groove 104 can the atress drive movable rod 103 upward movement, make the bottom of movable rod 103 can extract from the inside of draw-in groove 201, make moving member 2 can relieve spacing automatically, then the spring promotes atress board 202 displacement, make the whole atress of moving member 2 remove, make the detecting head can contact with the detection position, and then make data pass through the detection instrument and transmit, make the detection instrument can be with surveying on data transmission to the cell-phone, and then be convenient for observe and survey data.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides an install intelligent detection device on municipal bridge which characterized in that, an intelligent detection device who installs on municipal bridge includes:

a main body (1);

the solar mobile phone is characterized in that the main body (1) is of a T-shaped structure, two sides of the top end of the main body (1) are of cylindrical structures, the moving part (2) is installed at the bottom of the main body (1), the moving part (2) is of a rectangular frame structure, an intelligent wireless solar detector is arranged at the front end of the moving part (2), a detecting head is installed at the rear end of the moving part (2), the intelligent wireless solar detector is electrically connected with the detecting head, and the top end of the moving part (2) is inserted into a rectangular groove of the bottom part (105);

support piece (3), the front end of support piece (3) is equipped with the rectangular channel, and the front end of support piece (3) is equipped with pushing mechanism, and support piece (3) are rectangular plate structure, and the rear end bottom of support piece (3) is equipped with the wedge, and the top of support piece (3) is equipped with two round bars, and the round bar is middle bellied cylindrical structure, and the bottom outside cover of round bar is equipped with the spring.

2. The intelligent detection device installed on the municipal bridge according to claim 1, wherein the main body (1) comprises: the limiting groove (101), the limiting groove (101) is of a rectangular structure, and the limiting grooves (101) are uniformly arranged and arranged on two sides of the front end of the main body (1);

the sliding chute (102), the sliding chute (102) is T-shaped structure, the sliding chute (102) is arranged in the rear side of the main body (1).

3. The intelligent detection device installed on the municipal bridge according to claim 1, wherein the main body (1) further comprises: the movable rod (103) is of an L-shaped structure, the section of the middle position of the movable rod (103) is of a T-shaped structure, the movable rod (103) is embedded into the sliding groove (102), the bottom of the movable rod (103) is of a wedge-shaped structure, the movable rod (103) is internally provided with uniformly-arranged stress grooves (104), the stress grooves (104) are of a rectangular structure, and the upper portion of the rear end of each stress groove (104) is of an inclined structure.

4. The intelligent detection device installed on the municipal bridge according to claim 1, wherein the main body (1) further comprises: the bottom piece (105), the bottom piece (105) are pentagon structure, the inside of bottom piece (105) is equipped with the rectangular channel, bottom piece (105) front and back both ends are equipped with a wedge respectively, the front end of bottom piece (105) is equipped with guide piece (106), the top of guide piece (106) is L shape structure, the bottom of guide piece (106) is cylindrical structure, the bottom outside cover of guide piece (106) is equipped with the spring.

5. The intelligent detection device mounted on the municipal bridge according to claim 1, wherein the moving member (2) comprises: the clamping groove (201), the clamping groove (201) is of a wedge-shaped structure, the clamping groove (201) is formed in the rear portion of the top end of the moving piece (2), and the bottom of the moving rod (103) is inserted into the clamping groove (201);

the stress plate (202) is of a rectangular plate-shaped structure, the stress plate (202) is installed in front of the top end of the moving part (2), a round hole is formed in the top end of the stress plate (202), the bottom of the guide piece (106) is inserted into the round hole, and the front end of the stress plate (202) is in contact with the rear end of the spring.

6. The intelligent detection device mounted on the municipal bridge according to claim 1, wherein the support member (3) comprises: the fixing plate (301) is of a rectangular plate-shaped structure, four fixing holes are formed in the fixing plate (301), the fixing plate (301) is fixed at the rear end of the supporting piece (3), a rectangular through groove is formed in the middle of the inside of the fixing plate (301), and two T-shaped through grooves are formed in two sides of the fixing plate (301);

outer (302), outer (302) are the U-shaped structure, the front end in support piece (3) is established in outer (302), the front end both sides of outer (302) are equipped with a rectangular channel respectively, the both ends of outer (302) are equipped with a rectangular plate respectively, the both ends of rectangular plate are equipped with the round bar of protruding cylindrical structure in the middle of one respectively, the outside cover of round bar is equipped with the spring, the rectangular channel internally mounted of outer (302) has locating part (303), locating part (303) are the T shape structure, the inner the place ahead of locating part (303) is the slope column structure, both sides are equipped with the round hole about the outer end of locating part (303), the round hole has been inserted to inside, the inside of outer (302) is equipped with plug-in components (304), the front end of plug-in components (304) is the wedge structure.

7. The intelligent detection device mounted on the municipal bridge according to claim 1, wherein the support member (3) further comprises: push plate (305), push plate (305) are rectangle platelike structure, the front end of push plate (305) is the wedge structure, the inside of push plate (305) is equipped with two round holes, the round bar on support piece (3) top has been inserted to the inside of round hole, the bottom of push plate (305) and the top contact of round bar outside spring, the rear end of push plate (305) is equipped with picture peg (306), picture peg (306) are the rectangle structure, the intermediate position of picture peg (306) is equipped with the rectangular plate, the side cross-section of picture peg (306) is T shape structure, picture peg (306) and rectangular plate insert respectively inside the rectangle that fixed plate (301) led to the groove and the logical groove of T shape.

8. The intelligent detection device mounted on the municipal bridge according to claim 1, wherein the pushing mechanism comprises: the supporting piece comprises a top block (307), wherein the top block (307) is of an L-shaped structure, the rear end of the top block (307) is of a wedge-shaped structure, a sliding block (308) is arranged at the bottom of the top block (307), the sliding block (308) is of a T-shaped structure, and the top end of the sliding block (308) is inserted into a rectangular groove at the front end of the supporting piece (3).