CN108599164B

CN108599164B - Active power filter of atmospheric pressure absorption formula installation

Info

Publication number: CN108599164B
Application number: CN201810459853.XA
Authority: CN
Inventors: 崔宗跃
Original assignee: State Grid Fujian Electric Power Co Ltd Wuping County Power Supply Co; State Grid Fujian Electric Power Co Ltd; Longyan Power Supply Co of State Grid Fujian Electric Power Co Ltd
Current assignee: Fuzhou Luosheng Technology Co ltd; State Grid Fujian Electric Power Co Ltd Wuping County Power Supply Co; State Grid Fujian Electric Power Co Ltd; Longyan Power Supply Co of State Grid Fujian Electric Power Co Ltd
Priority date: 2018-05-15
Filing date: 2018-05-15
Publication date: 2021-10-22
Anticipated expiration: 2038-05-15
Also published as: CN108599164A; CN112909945A; CN112821259B; CN112821259A

Abstract

The invention belongs to the field of electric power, and particularly relates to an air pressure adsorption type installed active power filter which comprises a box body and a cabinet body fixedly connected to the upper end of the box body, wherein a side door is hinged to the side wall of the cabinet body, filtering equipment is installed in the cabinet body, a movable plate is arranged in the box body, a reset mechanism used for resetting the movable plate is arranged on the side wall of the box body, a supporting mechanism is arranged at the lower end of the movable plate, a transverse plate is arranged on the upper side of the movable plate, supporting columns are fixedly connected to four corners of the lower end of each transverse plate, the lower ends of the supporting columns penetrate through the movable plate and the bottom surface of the box body, a mounting seat is fixedly connected to the lower ends of the supporting columns, an opening corresponding to the mounting seat is formed in the bottom surface of the box body, rollers are installed at the lower ends of the mounting seat, a lifting mechanism used for adjusting the transverse plates is arranged in the box body, and a mounting plate is connected in the cabinet body in a sliding mode. Has the advantages that: the invention is convenient to carry and move the active power filter, has no damage to the ground in the installation process, and is convenient to install and overhaul the equipment in the active power filter.

Description

Active power filter of atmospheric pressure absorption formula installation

Technical Field

The invention belongs to the field of electric power, and particularly relates to an active power filter installed in an air pressure adsorption mode.

Background

The active power filter is a novel power electronic device for dynamically inhibiting harmonic waves and compensating reactive power, can quickly track and compensate harmonic waves with different sizes and frequencies, is called as an active power filter, and is only capable of passively absorbing harmonic waves with fixed frequency and fixed frequency compared with a passive LC filter.

When an existing active power filter is installed, the active power filter is generally installed through foundation bolts, holes need to be drilled in the ground in advance, the positions of the holes need to correspond to the positions of the foundation bolts one by one during drilling, great difficulty is brought to installation, floor tiles are generally laid in an existing machine room, and the ground of the machine room is seriously damaged during drilling; in addition, the existing active power filter usually does not have a moving function, and when the active power filter is transported, a plurality of persons are required to move the active power filter, which wastes time and labor; meanwhile, when the existing active power filter is used for installing power equipment, the cabinet body is sealed and arranged, the cabinet door can only be operated, the working space is small, light is dark, inconvenience is brought to installation and maintenance of the power equipment, in addition, the existing filter is poor in heat dissipation effect, and aging and damage of the filter are easy to accelerate when the filter works for a long time or the ambient temperature is high.

To this end, we propose a pneumatic adsorption type mounted active power filter to solve the above problems.

Disclosure of Invention

The present invention is directed to solve the above problems, and an object of the present invention is to provide an active power filter mounted by air pressure adsorption, which is simple to mount and has a good heat dissipation effect.

In order to achieve the purpose, the invention adopts the following technical scheme: an active power filter installed in an air pressure adsorption mode comprises a box body and a cabinet body fixedly connected to the upper end of the box body, wherein a side door is hinged to the side wall of the cabinet body, filter equipment is installed in the cabinet body, a movable plate is arranged in the box body, a reset mechanism used for resetting the movable plate is arranged on the side wall of the box body, a supporting mechanism is arranged at the lower end of the movable plate, a transverse plate is arranged on the upper side of the movable plate, supporting columns are fixedly connected to four corners of the lower end of each transverse plate, the lower ends of the supporting columns penetrate through the movable plate and the bottom surface of the box body, a mounting seat is fixedly connected to the lower ends of the supporting columns, an opening corresponding to the mounting seat is formed in the bottom surface of the box body, rollers are installed at the lower ends of the mounting seat, a lifting mechanism used for adjusting the transverse plate is arranged in the box body, and a mounting plate is connected in the cabinet body in a sliding mode, be equipped with the support piece that is used for carrying out the support to the mounting panel on the interior bottom surface of the cabinet body, be equipped with on the lateral wall of the cabinet body and be used for carrying out spacing stop gear to the mounting panel, be equipped with a plurality of bleeder vents on the lateral wall of the cabinet body, the upper end fixedly connected with heat dissipation mechanism of the cabinet body.

In the active power filter of foretell atmospheric pressure absorption formula installation, canceling release mechanical system is including setting up the sliding tray on the inside wall about the box, fixedly connected with slide bar in the sliding tray, the sliding tray is equipped with movable block and first spring, two on the slide bar the movable block respectively with the fly leaf about lateral wall fixed connection, the upper and lower both ends of first spring respectively with the lateral wall fixed connection of sliding tray and movable block.

In the active power filter installed in the air pressure adsorption manner, the supporting mechanism comprises a supporting pipe penetrating through the bottom surface of the box body, the lower end of the supporting pipe is fixedly connected with a supporting cover communicated with the supporting pipe, the supporting cover is in a round table shape with a small upper part and a large lower part, and an elastic membrane matched with the opening size of the lower side of the supporting cover is fixedly connected in the supporting cover.

In the active power filter of foretell atmospheric pressure absorption formula installation, elevating system includes two sliding blocks of sliding connection top surface in the box, the lower extreme of sliding block rotates and is connected with the dwang, the lower extreme of dwang rotates with the upper end of diaphragm to be connected, two run through on the sliding block and be equipped with same threaded rod, be equipped with the screw hole corresponding with the threaded rod on the sliding block, and the screw hole on two sliding blocks revolves to opposite, the one end of threaded rod is rotated with the inside wall of box and is connected, the other end of threaded rod runs through box and fixedly connected with rocking handle.

In the active power filter of foretell atmospheric pressure absorption formula installation, the upper end fixedly connected with first slider of sliding block, the interior top surface of box is equipped with the first spout with first slider assorted, and first slider is T type slider.

In the active power filter of foretell atmospheric pressure absorption formula installation, fixedly connected with second slider on the lateral wall of mounting panel, be equipped with on the inside wall of the cabinet body with second slider assorted second spout.

In the active power filter installed in the air pressure adsorption mode, the support piece comprises a telescopic rod connected to the lower end of the installation plate in a rotating mode, and the lower end of the telescopic rod is connected with the inner bottom face of the cabinet body in a rotating mode.

In the active power filter of foretell atmospheric pressure absorption formula installation, stop gear is including setting up the first recess on cabinet side wall, the one end that the side door was kept away from to the mounting panel is located the first recess, be equipped with the second recess on the lateral wall of the cabinet body, be linked together through the passageway between first recess and the second recess, fixedly connected with dead lever in the second recess, sliding sleeve is equipped with sliding plate and second spring on the dead lever, the upper and lower both ends of second spring respectively with the lateral wall fixed connection of second recess and sliding plate, the one end that the second recess was kept away from to the sliding plate extends to the external setting of cabinet, the lower extreme fixedly connected with gag lever post of sliding plate, the lower extreme of gag lever post runs through the passageway and extends to in the first recess, be equipped with on the mounting panel with gag lever post assorted spacing hole.

In the active power filter of foretell atmospheric pressure absorption formula installation, heat dissipation mechanism is including setting up the opening in the cabinet body upper end, fixedly connected with heat dissipation fan in the opening, the air intake fixedly connected with kuppe of heat dissipation fan, the upper end fixedly connected with cooler bin of the cabinet body, fill with the coolant liquid in the cooler bin, the upper end fixedly connected with three-way valve of kuppe, the first input end fixedly connected with first intake pipe of three-way valve, the second input end fixedly connected with second intake pipe of three-way valve, the one end that the three-way valve was kept away from in the second intake pipe runs through the cooler bin setting.

Compared with the prior art, the active power filter installed in an air pressure adsorption mode has the advantages that:

1. according to the invention, the transverse plate capable of moving up and down is arranged, so that the position of the roller can be adjusted as required, the cabinet body can be conveniently moved, and manpower and material resources are saved;

2. according to the invention, the support cover and the elastic membrane are arranged, so that the sealing plug can move upwards, the active power filter is fixed by utilizing atmospheric pressure, punching is not needed, the mounting difficulty is low, and the mounting efficiency can be greatly improved;

3. by arranging the slidable mounting plate, when the power equipment needs to be mounted or overhauled, one part of the mounting plate can slide out of the cabinet body, so that the operable space is greatly increased, and the overhauling and mounting difficulty is reduced for workers;

4. the air vent arranged close to the lower side of the cabinet body and the exhaust fan positioned at the upper end of the cabinet body are arranged, so that hot air in the cabinet body can be exhausted, and when the external temperature is higher, the external air can enter the cabinet body from the second air inlet pipe by adjusting the three-way valve, and the cooling box cools the entering air, so that the heat dissipation effect is improved.

Drawings

Fig. 1 is a perspective view showing the structure of a pressure-adsorption-type mounted active power filter according to the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

FIG. 4 is an enlarged view of the structure of FIG. 1 at C;

fig. 5 is a schematic structural diagram of a support member in an active power filter mounted in a gas pressure adsorption manner according to the present invention;

fig. 6 is a perspective view showing a placement structure of a pneumatic adsorption type active power filter according to the present invention;

fig. 7 is a schematic diagram of an external structure of an active power filter mounted in a pneumatic adsorption manner according to the present invention.

In the figure, 1 box body, 2 cabinet body, 3 side door, 4 movable plate, 5 transverse plate, 6 support column, 7 mounting seat, 8 rollers, 9 mounting plate, 10 heat radiation fan, 11 sliding groove, 12 sliding rod, 13 sliding block, 14 first spring, 15 support tube, 16 support cover, 17 elastic membrane, 18 sealing plug, 19 connecting rod, 20 rotating rod, 21 threaded rod, 22 rocking handle, 23 first sliding block, 24 second sliding block, 25 telescopic rod, 26 first groove, 27 second groove, 28 fixed rod, 29 sliding plate, 30 second spring, 31 limiting rod, 32 movable block, 33 cooling box, 34 three-way valve, 35 first air inlet pipe, 36 second air inlet pipe and 37 flow guide cover.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Examples

As shown in fig. 1-7, an active power filter installed in an air pressure adsorption manner comprises a box body 1 and a cabinet body 2 fixedly connected to the upper end of the box body 1, a side door 3 is hinged on the side wall of the cabinet body 2, a filter device is installed in the cabinet body 2, a movable plate 4 is arranged in the box body 1, a reset mechanism for resetting the movable plate 4 is arranged on the side wall of the box body 1, a support mechanism is arranged at the lower end of the movable plate 4, a transverse plate 5 is arranged on the upper side of the movable plate 4, support columns 6 are fixedly connected to four corners of the lower end of the transverse plate 5, the lower end of each support column 6 penetrates through the movable plate 4 and the bottom surface of the box body 1, a mounting seat 7 is fixedly connected to the lower end of each support column 6, an opening corresponding to the mounting seat 7 is arranged on the bottom surface of the box body 1, rollers 8 are installed at the lower end of the mounting seat 7, a lifting mechanism for adjusting the transverse plate 5 is arranged in the box body 1, and a mounting plate 9 is slidably connected to the box body 2, it is specific, fixedly connected with second slider 24 on the lateral wall of mounting panel 9, be equipped with on the inside wall of the cabinet body 2 with 24 assorted second spouts of second slider, be equipped with the support piece that is used for carrying out the support to mounting panel 9 on the interior bottom surface of the cabinet body 2, it is worth mentioning that, support piece is including rotating the telescopic link 25 of connecting at the mounting panel 9 lower extreme, the lower extreme of telescopic link 25 is connected with the interior bottom surface rotation of the cabinet body 2, it needs to notice that, telescopic link 25 is for having locking function's telescopic link, telescopic link 25 can be when the 9 roll-off cabinets body 2 of mounting panel, play the supporting role to mounting panel 9, improve mounting panel 9's stable in structure, be equipped with on the lateral wall of the cabinet body 2 and be used for carrying out spacing stop gear to mounting panel 9, be equipped with a plurality of bleeder vents on the lateral wall of the cabinet body 2, the upper end fixedly connected with heat dissipation mechanism of the cabinet body 2.

Wherein, canceling release mechanical system is including setting up the sliding tray 11 on the inside wall about box 1, fixedly connected with slide bar 12 in the sliding tray 11, the sliding tray is equipped with movable block 32 and first spring 14 on slide bar 12, two movable blocks 32 respectively with the fly leaf 4 about lateral wall fixed connection, the upper and lower both ends of first spring 14 respectively with the lateral wall fixed connection of sliding tray 11 and movable block 32, through setting up canceling release mechanical system, can make fly leaf 4 when losing the effect of mount pad 7, automatic resetting downwards.

Wherein, the supporting mechanism includes the stay tube 15 that runs through and set up on the bottom surface of box 1, the lower extreme fixedly connected with of stay tube 15 is linked together with it and supports the cover 16, support the round platform form that the cover 16 is big end down, support cover 16 internal fixedly connected with and its downside opening size assorted elastic membrane 17, be equipped with sealing plug 18 in the stay tube 15, sealing plug 18 passes through the lower extreme fixed connection of connecting rod 19 with fly leaf 4, when sealing plug 18 upwards moves, can make the space grow between stay tube 15 and the support cover 16, make its inside atmospheric pressure diminish, under the effect of atmospheric pressure, make support cover 16 adsorb firmly on ground, need not additionally to use drilling equipment to punch, not only the installation degree of difficulty greatly reduced, and the construction noise, consumptive material etc. also correspondingly reduce.

Wherein, the lifting mechanism comprises two sliding blocks 13 which are connected with the inner top surface of the box body 1 in a sliding way, in particular, the upper end of the sliding block 13 is fixedly connected with a first sliding block 23, the inner top surface of the box body 1 is provided with a first sliding chute matched with the first sliding block 23, the first sliding block 23 is a T-shaped sliding block, the lower end of the sliding block 13 is rotatably connected with a rotating rod 20, the lower end of the rotating rod 20 is rotatably connected with the upper end of the transverse plate 5, the two sliding blocks 13 are provided with a same threaded rod 21 in a penetrating way, the sliding blocks 13 are provided with threaded holes corresponding to the threaded rod 21, the threaded holes on the two sliding blocks 13 are opposite in rotating direction, one end of the threaded rod 21 is rotatably connected with the inner side wall of the box body 1, the other end of the threaded rod 21 penetrates through the box body 1 and is fixedly connected with a rocking handle 22, the lifting mechanism can control the position of the transverse plate 5, thereby adjusting the position of a roller 8 arranged at the lower end of the transverse plate 5, and when the mounting seat 7 moves upwards, the movable plate 4 can be driven to move upwards, so that the sealing plug 18 is driven to move upwards.

Wherein, the limiting mechanism comprises a first groove 26 arranged on the side wall of the cabinet body 2, one end of the mounting plate 9 far away from the side door 3 is positioned in the first groove 26, the outer side wall of the cabinet body 2 is provided with a second groove 27, the first groove 26 is communicated with the second groove 27 through a channel, the second groove 27 is internally and fixedly connected with a fixed rod 28, the fixed rod 28 is sleeved with a sliding plate 29 and a second spring 30 in a sliding way, the upper end and the lower end of the second spring 30 are respectively and fixedly connected with the second groove 27 and the side wall of the sliding plate 29, one end of the sliding plate 29 far away from the second groove 27 extends to the outside of the cabinet body 2, the lower end of the sliding plate 29 is fixedly connected with a limiting rod 31, the lower end of the limiting rod 31 penetrates through the channel and extends to the first groove 26, the mounting plate 9 is provided with a limiting hole matched with the limiting rod 31, and the position of the mounting plate 9 can be limited by the limiting mechanism, the mounting plate 9 is prevented from sliding out of the cabinet 2 when being shocked.

Wherein, heat dissipation mechanism is including setting up the opening in cabinet body 2 upper end, fixedly connected with heat dissipation fan 10 in the opening, the air intake fixedly connected with kuppe 37 of heat dissipation fan 10, the upper end fixedly connected with cooler bin 33 of cabinet body 2, fill with the coolant liquid in cooler bin 33, the upper end fixedly connected with three-way valve 34 of kuppe 37, the first input end fixedly connected with first intake pipe 35 of three-way valve 34, the second input end fixedly connected with second intake pipe 36 of three-way valve 34, the one end that three-way valve 34 was kept away from to second intake pipe 36 runs through cooler bin 33 and sets up, second intake pipe 36 and cooler bin 33 sealing connection, it is worth mentioning that, the part that second intake pipe 36 is located cooler bin 33 is wavy setting, can prolong cooler bin 33 to the cool time of second intake pipe 36, and the cooling effect is improved.

In the present invention, the specific type, structural features, control device, and the like of the heat dissipation fan 10 belong to the prior art, and are not described herein again.

When the multifunctional wardrobe is installed, the roller 8 is firstly utilized to move the wardrobe body 2 to a proper position, then the rocking handle 22 is rotated, the rocking handle 22 drives the threaded rod 21 to rotate, threaded holes with opposite rotating directions are formed in the two sliding blocks 13, therefore, the threaded rod 21 can drive the two sliding blocks 13 to move towards the directions away from each other, the sliding blocks 13 drive the rotating rod 20 to deflect, the rotating rod 20 drives the transverse plate 5 to move upwards, the transverse plate 5 drives the installation seat 7 and the roller 8 installed at the lower end of the installation seat to move upwards, so that the roller 8 is in a suspended state, the support cover 16 is in contact with the ground, the installation seat 7 moves upwards to contact with the movable plate 4, then the movable plate 4 is driven to move upwards, the movable plate 4 drives the sealing plug 18 to move upwards through the connecting rod 19, and the support cover 16 is tightly adsorbed on the ground.

When the filter equipment is installed, the installation plate 9 can be pulled out, then the telescopic rod 25 is locked to support the installation plate 9, after the installation is completed, the installation plate 9 is inserted into the first groove 26, and the installation plate 9 is limited through the limiting rod 31 to prevent the installation plate 9 from sliding out accidentally.

Although terms such as the cabinet 1, the cabinet 2, the side door 3, the movable panel 4, the cross plate 5, the support pillar 6, the mount base 7, the roller 8, the mount plate 9, the heat radiation fan 10, the sliding groove 11, the sliding rod 12, the sliding block 13, the first spring 14, the support pipe 15, the support cover 16, the elastic membrane 17, the sealing plug 18, the connection rod 19, the rotation rod 20, the threaded rod 21, the rocking handle 22, the first slider 23, the second slider 24, the expansion rod 25, the first groove 26, the second groove 27, the fixing rod 28, the sliding plate 29, the second spring 30, the stopper rod 31, the movable block 32, the cooling box 33, the three-way valve 34, the first intake duct 35, the second intake duct 36, and the deflector 37 are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The active power filter comprises a box body (1) and a cabinet body (2) fixedly connected to the upper end of the box body (1), wherein a side door (3) is hinged to the side wall of the cabinet body (2), and a filter device is installed in the cabinet body (2), and is characterized in that a movable plate (4) is arranged in the box body (1), a reset mechanism for resetting the movable plate (4) is arranged on the side wall of the box body (1), a supporting mechanism is arranged at the lower end of the movable plate (4), a transverse plate (5) is arranged on the upper side of the movable plate (4), supporting columns (6) are fixedly connected to four corners of the lower end of the transverse plate (5), the lower ends of the supporting columns (6) penetrate through the bottom surfaces of the movable plate (4) and the box body (1), a mounting seat (7) is fixedly connected to the lower ends of the supporting columns (6), an opening corresponding to the mounting seat (7) is arranged on the bottom surface of the box body (1), the lower end of the mounting seat (7) is provided with a roller (8), a lifting mechanism used for adjusting the transverse plate (5) is arranged in the box body (1), the cabinet body (2) is connected with a mounting plate (9) in a sliding manner, a supporting piece used for supporting the mounting plate (9) is arranged on the inner bottom surface of the cabinet body (2), a limiting mechanism used for limiting the mounting plate (9) is arranged on the side wall of the cabinet body (2), a plurality of air holes are formed in the side wall of the cabinet body (2), and the upper end of the cabinet body (2) is fixedly connected with a heat dissipation mechanism;

the reset mechanism comprises sliding grooves (11) formed in the left inner side wall and the right inner side wall of the box body (1), sliding rods (12) are fixedly connected in the sliding grooves (11), movable blocks (32) and first springs (14) are slidably sleeved on the sliding rods (12), the two movable blocks (32) are fixedly connected with the left side wall and the right side wall of the movable plate (4) respectively, and the upper end and the lower end of each first spring (14) are fixedly connected with the sliding grooves (11) and the side walls of the movable blocks (32) respectively;

the supporting mechanism comprises a supporting pipe (15) which penetrates through the bottom surface of the box body (1), the lower end of the supporting pipe (15) is fixedly connected with a supporting cover (16) communicated with the supporting pipe, the supporting cover (16) is in a circular table shape with a small upper part and a large lower part, an elastic membrane (17) matched with the opening of the lower side of the supporting cover is fixedly connected in the supporting cover (16), a sealing plug (18) is arranged in the supporting pipe (15), and the sealing plug (18) is fixedly connected with the lower end of the movable plate (4) through a connecting rod (19);

the heat dissipation mechanism is including setting up the opening in the cabinet body (2) upper end, fixedly connected with heat dissipation fan (10) in the opening, the air intake fixedly connected with kuppe (37) of heat dissipation fan (10), the upper end fixedly connected with cooler bin (33) of the cabinet body (2), fill with the coolant liquid in cooler bin (33), the upper end fixedly connected with three-way valve (34) of kuppe (37), the first input end fixedly connected with first intake pipe (35) of three-way valve (34), the second input end fixedly connected with second intake pipe (36) of three-way valve (34), the one end that three-way valve (34) were kept away from in second intake pipe (36) runs through cooler bin (33) and sets up.

2. The active power filter of atmospheric pressure adsorption-type installation of claim 1, characterized in that, elevating system includes two sliding blocks (13) of sliding connection top surface in box (1), the lower extreme of sliding block (13) is rotated and is connected with dwang (20), the lower extreme of dwang (20) is rotated with the upper end of diaphragm (5) and is connected, two run through on sliding block (13) and be equipped with same threaded rod (21), be equipped with the screw hole corresponding with threaded rod (21) on sliding block (13), and the screw hole on two sliding blocks (13) is turned to on the contrary, the one end of threaded rod (21) is rotated with the inside wall of box (1) and is connected, the other end of threaded rod (21) runs through box (1) and fixedly connected with rocking handle (22).

3. The active power filter of claim 2, wherein the upper end of the sliding block (13) is fixedly connected with a first sliding block (23), the inner top surface of the box body (1) is provided with a first sliding groove matched with the first sliding block (23), and the first sliding block (23) is a T-shaped sliding block.

4. The active power filter with the air pressure adsorption type installation function according to claim 1, wherein a second sliding block (24) is fixedly connected to the side wall of the installation plate (9), and a second sliding groove matched with the second sliding block (24) is formed in the inner side wall of the cabinet body (2).

5. A gas pressure adsorption mounted active power filter according to claim 1, characterized in that the support member comprises a telescopic rod (25) rotatably connected to the lower end of the mounting plate (9), the lower end of the telescopic rod (25) being rotatably connected to the inner bottom surface of the cabinet body (2).

6. The air pressure adsorption type active power filter of claim 1, wherein the limiting mechanism comprises a first groove (26) disposed on a side wall of the cabinet body (2), one end of the mounting plate (9) far away from the side door (3) is located in the first groove (26), a second groove (27) is disposed on an outer side wall of the cabinet body (2), the first groove (26) and the second groove (27) are communicated through a channel, a fixing rod (28) is fixedly connected in the second groove (27), a sliding plate (29) and a second spring (30) are slidably sleeved on the fixing rod (28), an upper end and a lower end of the second spring (30) are respectively fixedly connected with the second groove (27) and a side wall of the sliding plate (29), one end of the sliding plate (29) far away from the second groove (27) extends to the outside of the cabinet body (2), the lower end of the sliding plate (29) is fixedly connected with a limiting rod (31), the lower end of the limiting rod (31) penetrates through the channel and extends into the first groove (26), and a limiting hole matched with the limiting rod (31) is formed in the mounting plate (9).