CN214045460U

CN214045460U - Protection device of converter convenient to installation

Info

Publication number: CN214045460U
Application number: CN202120176997.1U
Authority: CN
Inventors: 周放
Original assignee: Hunan Siling Industrial Control Co ltd
Current assignee: Hunan Siling Industrial Control Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-08-24
Anticipated expiration: 2031-01-22

Abstract

The utility model discloses a protection device of converter convenient to installation, by the protection device main part, the protection device cabinet door, the observation window, including a motor, an end cap, a controller, and a cover plate, first stopper, ventilation mechanism, installation mechanism and baffle are constituteed, wherein ventilation mechanism is by first mounting bracket, the scavenger fan, filter the wind bag, you, the aviation baffle, power connecting wire and wind direction are constituteed, wherein the wind direction is not the part, but the air flow of scavenger fan is directional, installation mechanism is by the support column, first installation piece, the extrusion piece, hinder the piece, reset spring, second installation piece, carry and draw the piece, carry the pull ring, solid fixed sliding block and second spacing block constitute. A protection device of converter convenient to installation, through the ventilation mechanism increase protection device's that sets up circulation of air, avoid protection device overheated to cause the influence to the converter, installation mechanism easy to assemble through setting up and dismantle the converter, brought better use prospect for the converter field.

Description

Protection device of converter convenient to installation

Technical Field

The utility model relates to a converter field specifically is a protection device of converter convenient to installation.

Background

The frequency converter is a power control device which applies frequency conversion technology and microelectronic technology and controls an alternating current motor by changing the frequency mode of a working power supply of the motor, and mainly comprises a rectification unit (alternating current to direct current), a filtering unit, an inversion unit (direct current to alternating current), a braking unit, a driving unit, a detection unit and a microprocessing unit. The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off an internal IGBT, provides the required power supply voltage according to the actual requirement of the motor, and further achieves the purposes of energy saving and speed regulation. With the continuous improvement of the industrial automation degree, the frequency converter is also widely applied.

When the existing frequency converter protection device is installed and used, the frequency converter is inconvenient to install and detach, the ventilation function is not provided, certain adverse effects are brought to the use process of people, and therefore the frequency converter protection device convenient to install is provided.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a protection device of converter convenient to installation possesses advantages such as ventilation, easy to assemble and dismantlement, can effectively solve the problem among the background art.

(II) technical scheme

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a protection device of converter convenient to installation, includes the protection device main part, the one end surface swing joint protection device cabinet door of protection device main part, the connection observation window can be dismantled to the inner wall of protection device cabinet door, the upper end surface fixed connection motor of protection device main part, the first stopper of rear end front surface fixed connection of protection device main part, the connection ventilation mechanism can be dismantled to the one end internal surface of protection device main part, the rear end front surface fixed connection baffle of protection device main part, the inner wall swing joint installation mechanism of baffle.

Preferably, first stopper is provided with eight groups, and every two sets of upper and lower ends and both ends that are located protection device main part rear end surface respectively, the baffle is provided with four groups, and is located the upper and lower ends and both ends of protection device main part rear end surface respectively, installation mechanism is provided with four groups, and is located the inner wall of four groups of baffles respectively.

Preferably, the ventilation mechanism comprises a first mounting frame, a ventilator, a filtering air bag, a second mounting frame, air deflectors, a power connecting wire and air directions, the air directions are not components, but air flowing directions of the ventilator are directional, the ventilator is provided with two groups of ventilators, the two groups of ventilators are respectively located on the outer surfaces of the upper ends of the two ends of the first mounting frame, the filtering air bag is located at one end of the outer wall of one group of ventilators, the second mounting frame is located on the outer surface of the upper end of the one group of ventilators, the air deflectors are located at the other end of the outer surface of the lower end of the second mounting frame, and the power connecting wire is located on the inner walls of the first mounting frame and the second mounting frame.

Preferably, a fixed thread is arranged between the first mounting frame and the ventilator, the outer wall of the upper end of the first mounting frame is detachably connected with the inner wall of the lower end of the ventilator protection device cabinet door through the fixed thread, a mounting groove is arranged between the ventilator and the air filtering bag, one end of the outer wall of the ventilator is detachably connected with the inner wall of the inlet of the air filtering bag through the mounting groove, a fixed thread is arranged between the ventilator and the second mounting frame, the inner wall of the upper end of the ventilator is detachably connected with the outer wall of the lower end of the second mounting frame through the fixed thread, a fixing glue is arranged between the second mounting frame and the air deflector, the outer surface of the lower end of the second mounting frame is fixedly connected with the outer surface of the upper end of the air deflector through the fixing glue, a placing groove is arranged between the first mounting frame and the power supply connecting wire, and the power supply connecting wire is placed in the placing groove of the first mounting frame, a placing groove is formed between the second mounting frame and the power connecting wire, the power connecting wire is placed in the placing groove of the second mounting frame, the input end of the ventilation fan is electrically connected with the output end of the power connecting wire, and the output end of the motor is electrically connected with the input end of the power connecting wire.

Preferably, a set of the installation mechanism comprises a support column, a first installation block, an extrusion block, a blocking block, a return spring, a second installation block, a lifting ring, a fixed sliding block and a second limiting block.

Preferably, the first mounting block is located on the outer surface of the upper end of the supporting column, the extruding block is located on the outer surface of the upper end of the first mounting block, the blocking block is located at the front end of the outer surface of the upper end of the extruding block, the return spring is located on the outer wall of the supporting column, the second mounting block is located on the outer surface of the lower end of the supporting column, the pulling blocks are located on the outer surface of the lower end of the second mounting block, the two groups of fixed sliders are located on the inner surfaces of the two ends of the pulling blocks respectively, the two groups of pulling rings are located on the outer surfaces of one ends of the two groups of fixed sliders respectively, and the two groups of second limiting blocks are located on the outer surfaces of the other ends of the two groups of fixed sliders respectively.

Preferably, a fixed thread is arranged between the supporting column and the first mounting block, the upper end of the outer wall of the supporting column is detachably connected with the inner wall of the lower end of the first mounting block through the fixed thread, the first mounting block is welded with the extrusion block, the extrusion block is welded with the blocking block, a fixing thread is arranged between the supporting column and the second mounting block, the lower end of the outer wall of the supporting column is detachably connected with the inner wall of the upper end of the second mounting block through a fixing thread, the second mounting block is welded with the lifting block, a movable groove is arranged between the lifting block and the fixed sliding block, the inner wall of the lifting block is movably connected with the outer wall of the fixed sliding block through a movable groove, fixing glue is arranged between the lifting ring and the fixed sliding block, the outer surface of one end of the lifting ring is fixedly connected with the outer surface of one end of the fixed sliding block through fixing glue, and the fixed sliding block and the second limiting block are integrally formed.

(III) advantageous effects

Compared with the prior art, the utility model provides a protection device of converter convenient to installation possesses following beneficial effect:

1. the protection device of the frequency converter convenient to install comprises a protection device main body, a protection device cabinet door, an observation window, a motor, a first limiting block, a ventilation mechanism, an installation mechanism and a baffle plate, wherein the ventilation mechanism comprises a first installation frame, ventilation fans, a filtering air bag, a second installation frame, a wind deflector, a power supply connecting wire and wind directions, the wind directions are not components, but air flowing directions of the ventilation fans, the power supply connecting wire arranged on the inner walls of the first installation frame and the second installation frame is connected with two groups of ventilation fans, then the power supply connecting wire extending out of one end of the second installation frame is installed with the motor to provide power for the two groups of ventilation fans, the ventilation fans with one ends of the wind deflectors absorb outside air into the protection device main body, and the air can pass through the filtering air bag when entering the protection device main body and leave impurities such as dust in the filtering air bag, avoid causing the influence to the converter, another group's ventilation mechanism that sets up can take the inside air of protection device main part out, lets the heat that produces by the work of converter take out through the air, avoids the inner wall of protection device main part overheated to cause the influence to the converter.

2. The protection device of the frequency converter convenient to install comprises a protection device main body, a protection device cabinet door, an observation window, a motor, a first limiting block, a ventilation mechanism, an installation mechanism and a baffle, wherein the installation mechanism comprises a support column, a first installation block, an extrusion block, a blocking block, a reset spring, a second installation block, a lifting ring, a fixed sliding block and a second limiting block, the installation mechanism is pulled outwards through the arranged lifting block by using one hand until the lifting block passes through the first limiting block, then the fixed sliding block is pulled out through the lifting ring by using the other hand until the second limiting block touches the inner wall position of the lifting block, so that the hand placed on the lifting block can be withdrawn, the reset spring can be reset inwards again at the moment but can be limited by the combination of the fixed sliding block and the first limiting block, and then a group of installation mechanisms are pulled open, the frequency converter is placed into the inner wall of the protection device main body, one hand is used for pulling the lifting block to withdraw the fixed sliding block into the inner wall of the lifting block, the mounting mechanism is slowly reset, the mounting mechanism is reset in a group, four groups of blocking blocks are arranged, the frequency converter is inwards extruded under the influence of four groups of reset springs to form a balance, the frequency converter can be mounted in the protection device main body, the formed balance is prevented from being damaged by impact when the frequency converter is seriously impacted by the blocking blocks, the frequency converter is unstable to be mounted, the frequency converter mounted in the protection device main body is convenient to dismount, the mounting mechanism can be dismounted from the frequency converter in a group according to the steps.

Drawings

Fig. 1 is the utility model relates to a converter's protection device's overall structure schematic diagram convenient to installation.

Fig. 2 is a schematic structural view of a ventilation mechanism in the protection device of the frequency converter convenient for installation.

Fig. 3 is an enlarged view of a portion a of fig. 2 according to the present invention.

Fig. 4 is a schematic structural diagram of an installation mechanism in the protection device of the frequency converter convenient for installation.

Fig. 5 is a perspective view showing the extrusion block and the blocking block in the protection device of the frequency converter convenient for installation.

In the figure: 1. a protection device main body; 2. a protection device cabinet door; 3. an observation window; 4. a motor; 5. a first stopper; 6. a ventilation mechanism; 7. an installation mechanism; 8. a baffle plate; 601. a first mounting bracket; 602. a ventilator; 603. filtering the air bag; 604. a second mounting bracket; 605. an air deflector; 606. a power connection line; 607. wind direction; 701. a support pillar; 702. a first mounting block; 703. extruding the block; 704. a blocking block; 705. a return spring; 706. a second mounting block; 707. lifting the block; 708. lifting the ring; 709. fixing the sliding block; 710. and a second limiting block.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-5, a protection device of a frequency converter convenient to install, including protection device main body 1, protection device cabinet door 2 is connected to one end surface swing joint of protection device main body 1, observation window 3 can be dismantled and connected to the inner wall of protection device cabinet door 2, motor 4 is connected to the upper end surface fixed connection of protection device main body 1, first stopper 5 of rear end front surface fixed connection of protection device main body 1, ventilation mechanism 6 can be dismantled and connected to the one end internal surface of protection device main body 1, baffle 8 is connected to the rear end front surface fixed connection of protection device main body 1, inner wall swing joint installation mechanism 7 of baffle 8.

Further, the first limiting block 5 is provided with eight groups, every two groups of the first limiting block are respectively located at the upper end, the lower end and the two ends of the outer surface of the rear end of the protection device main body 1, the baffles 8 are provided with four groups and are respectively located at the upper end, the lower end and the two ends of the outer surface of the rear end of the protection device main body 1, the mounting mechanisms 7 are provided with four groups and are respectively located at the inner walls of the four groups of the baffles 8, and the protection device main body 1 is convenient to use.

Further, the ventilation mechanism 6 includes a first mounting frame 601, the ventilator 602, the air bag 603 is filtered, a second mounting frame 604, the air deflector 605, the power connection line 606 and the wind direction 607, the wind direction 607 is not a component, but the air flow of the ventilator 602 is directional, the ventilator 602 is provided with two sets, and the upper end outer surfaces at the two ends of the first mounting frame 601 are located respectively, the air bag 603 is located at one end of the outer wall of the set of ventilator 602, the second mounting frame 604 is located at the outer surface of the upper end of the set of ventilator 602, the air deflector 605 is located at the other end of the outer surface of the lower end of the second mounting frame 604, the power connection line 606 is located at the inner walls of the first mounting frame 601 and the second mounting frame 604, and the ventilation mechanism 6 is convenient to use.

Further, a fixing thread is arranged between the first mounting frame 601 and the ventilator 602, the outer wall of the upper end of the first mounting frame 601 is detachably connected with the inner wall of the lower end of the protection device cabinet door 2 of the ventilator 602 through the fixing thread, a mounting groove is arranged between the ventilator 602 and the air filtering bag 603, one end of the outer wall of the ventilator 602 is detachably connected with the inner wall of the inlet of the air filtering bag 603 through the mounting groove, a fixing thread is arranged between the ventilator 602 and the second mounting frame 604, the inner wall of the upper end of the ventilator 602 is detachably connected with the outer wall of the lower end of the second mounting frame 604 through the fixing thread, a fixing glue is arranged between the second mounting frame 604 and the air deflector 605, the outer surface of the lower end of the second mounting frame 604 is fixedly connected with the outer surface of the upper end of the air deflector 605 through the fixing glue, a placing groove is arranged between the first mounting frame 601 and the power connection wire 606, and the power connection wire 606 is placed in the placing groove of the first mounting frame 601, be provided with the standing groove between second mounting bracket 604 and the power connecting wire 606, power connecting wire 606 places in the standing groove of second mounting bracket 604, the input of scavenger fan 602 and the output electric connection of power connecting wire 606, the output of motor 4 and the input electric connection of power connecting wire 606, through the inside ventilation effect of the 6 reinforcing protection device main part 1 of ventilation mechanism that set up.

Further, a group of mounting mechanisms 7 comprises a supporting column 701, a first mounting block 702, a pressing block 703, a blocking block 704, a return spring 705, a second mounting block 706, a lifting block 707, a lifting ring 708, a fixed sliding block 709 and a second limiting block 710, and the composition of the group of mounting mechanisms 7 is known.

Further, the first mounting block 702 is located on the outer surface of the upper end of the supporting column 701, the extrusion block 703 is located on the outer surface of the upper end of the first mounting block 702, the blocking block 704 is located at the front end of the outer surface of the upper end of the extrusion block 703, the return spring 705 is located on the outer wall of the supporting column 701, the second mounting block 706 is located on the outer surface of the lower end of the supporting column 701, the pulling block 707 is located on the outer surface of the lower end of the second mounting block 706, the two sets of fixing sliders 709 are arranged and located on the inner surfaces of the two ends of the pulling block 707 respectively, the two sets of pulling rings 708 are arranged and located on the outer surfaces of one ends of the two sets of fixing sliders 709 respectively, the two sets of second limiting blocks 710 are arranged and located on the outer surfaces of the other ends of the two sets of fixing sliders 709 respectively, and the mounting mechanism 7 is convenient to use.

Further, a fixed thread is arranged between the supporting column 701 and the first mounting block 702, the upper end of the outer wall of the supporting column 701 is detachably connected with the inner wall of the lower end of the first mounting block 702 through the fixed thread, the first mounting block 702 is welded with the extrusion block 703, the extrusion block 703 is welded with the blocking block 704, a fixed thread is arranged between the supporting column 701 and the second mounting block 706, the lower end of the outer wall of the supporting column 701 is detachably connected with the inner wall of the upper end of the second mounting block 706 through the fixed thread, the second mounting block 706 is welded with the lifting block 707, a movable groove is arranged between the lifting block 707 and the fixed slider 709, the inner wall of the lifting block 707 is movably connected with the outer wall of the fixed slider 709 through the movable groove, a fixed glue is arranged between the lifting ring 708 and the fixed slider 709, the outer surface of one end of the lifting ring 708 is fixedly connected with the outer surface of one end of the fixed slider 709 through the fixed glue, the fixed slider 709 is integrally formed with the second limiting block 710, the frequency converter is conveniently arranged on the inner wall of the protection device cabinet door 2 of the protection device main body 1 through the arranged mounting mechanism 7, and is also convenient to detach.

Principle of operation

The protection device of the frequency converter convenient to install comprises a protection device main body 1, a protection device cabinet door 2, an observation window 3, a motor 4, a first limiting block 5, a ventilation mechanism 6, an installation mechanism 7 and a baffle plate 8, wherein the ventilation mechanism 6 comprises a first mounting frame 601, a ventilation fan 602, a filtering air bag 603, a second mounting frame 604, a wind guide plate 605, a power supply connecting wire 606 and a wind direction 607, the wind direction 607 is not a component, but the air flowing direction of the ventilation fan 602, the power supply connecting wire 606 arranged on the inner walls of the first mounting frame 601 and the second mounting frame 604 is connected with two groups of ventilation fans 602, the power supply connecting wire 606 at one end of the second mounting frame 604 and the motor 4 are installed together to provide power for the two groups of ventilation fans 602, the ventilation fans 602 with one ends of the wind guide plates absorb outside air into the protection device main body 1, and the air passes through the filtering air bag 603 when entering the protection device main body 1, the installation mechanism 7 of the protection device of the frequency converter convenient to install consists of a supporting column 701, a first installation block 702, a squeezing block 703, a blocking block 704, a reset spring 705, a second installation block 706, a lifting block 707, a lifting ring 708, a fixed sliding block 709 and a second limiting block 710, wherein the installation mechanism 7 is pulled outwards through the arranged lifting block 707 by one hand until the lifting block 707 passes through the first limiting block 5, and then the fixed sliding block 709 is pulled out through the lifting ring 708 by the other hand until the second limiting block 710 touches the position of the inner wall of the lifting block 707, the hand placed on the lifting block 707 can be retracted, at this time, the return spring 705 is to be reset inwards again, but the return spring is limited by the combination of the fixed sliding block 709 and the first limiting block 5, then the mounting mechanism 7 is pulled away in a group, the frequency converter is placed on the inner wall of the protection device main body 1, then the lifting block 707 is pulled by one hand to retract the fixed sliding block 709 to the inner wall of the lifting block 707, the mounting mechanism 7 is reset slowly, the mounting mechanism 7 is reset in a group, the four groups of blocking blocks 704 are arranged to press the frequency converter inwards under the influence of the four groups of return springs 705 to form a balance, so that the frequency converter can be mounted in the protection device main body 1, the blocking blocks 704 are arranged to prevent the balance formed when the frequency converter is impacted seriously, so that the mounting of the frequency converter is unstable, and the frequency converter mounted in the protection device main body 1 is convenient to dismount, the frequency converter can be disassembled by a group of the mounting mechanisms 7 according to the steps.

It is noted that, herein, relational terms such as first and second (a, b, etc.) and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A protection device of converter convenient to installation, includes protection device main part (1), its characterized in that: the one end surface swing joint protection device cabinet door (2) of protection device main part (1), the inner wall of protection device cabinet door (2) can be dismantled and connect observation window (3), the upper end surface fixed connection motor (4) of protection device main part (1), the first stopper (5) of rear end front surface fixed connection of protection device main part (1), the one end internal surface of protection device main part (1) can be dismantled and connect ventilation mechanism (6), rear end front surface fixed connection baffle (8) of protection device main part (1), the inner wall swing joint installation mechanism (7) of baffle (8).

2. A protection device for a frequency converter easy to install according to claim 1, characterized in that: first stopper (5) are provided with eight groups, and every two sets of upper and lower ends and both ends that are located protection device main part (1) rear end surface respectively, baffle (8) are provided with four groups, and are located the upper and lower end and both ends of protection device main part (1) rear end surface respectively, installation mechanism (7) are provided with four groups, and are located the inner wall of four groups of baffles (8) respectively.

3. A protection device for a frequency converter easy to install according to claim 1, characterized in that: the ventilating mechanism (6) comprises a first mounting frame (601), a ventilating fan (602), a filtering air bag (603), a second mounting frame (604), an air deflector (605), a power supply connecting wire (606) and an air direction (607), wherein the air direction (607) is not a component but is the air flowing direction of the ventilating fan (602), the ventilating fan (602) is provided with two groups and is respectively located on the outer surfaces of the upper ends of the two ends of the first mounting frame (601), the filtering air bag (603) is located at one end of the outer wall of the group of ventilating fan (602), the second mounting frame (604) is located on the outer surface of the upper end of the group of ventilating fan (602), the air deflector (605) is located at the other end of the outer surface of the lower end of the second mounting frame (604), and the power supply connecting wire (606) is located on the inner walls of the first mounting frame (601) and the second mounting frame (604).

4. A protection device for a frequency converter easy to install according to claim 3, characterized in that: a fixed thread is arranged between the first mounting frame (601) and the ventilator (602), the outer wall of the upper end of the first mounting frame (601) is detachably connected with the inner wall of the lower end of a protection device cabinet door (2) of the ventilator (602) through the fixed thread, a mounting groove is arranged between the ventilator (602) and the air filtering bag (603), one end of the outer wall of the ventilator (602) is detachably connected with the inner wall of an inlet of the air filtering bag (603) through the mounting groove, a fixed thread is arranged between the ventilator (602) and the second mounting frame (604), the inner wall of the upper end of the ventilator (602) is detachably connected with the outer wall of the lower end of the second mounting frame (604) through the fixed thread, a fixing glue is arranged between the second mounting frame (604) and the air deflector (605), the outer surface of the lower end of the second mounting frame (604) is fixedly connected with the outer surface of the upper end of the air deflector (605) through the fixing glue, be provided with the standing groove between first mounting bracket (601) and power connecting wire (606), power connecting wire (606) are placed in the standing groove of first mounting bracket (601), be provided with the standing groove between second mounting bracket (604) and power connecting wire (606), power connecting wire (606) are placed in the standing groove of second mounting bracket (604), the input of scavenger fan (602) and the output electric connection of power connecting wire (606), the output of motor (4) and the input electric connection of power connecting wire (606).

5. A protection device for a frequency converter easy to install according to claim 2, characterized in that: the group of mounting mechanisms (7) comprises a supporting column (701), a first mounting block (702), a squeezing block (703), a blocking block (704), a return spring (705), a second mounting block (706), a lifting block (707), a lifting ring (708), a fixed sliding block (709) and a second limiting block (710).

6. A protection device for a frequency converter easy to install according to claim 5, characterized in that: the utility model discloses a support column, including first installation piece (702), extrusion piece (703), second installation piece (706), pull ring (708), first stopper (710) is located the upper end surface of support column (701), extrusion piece (703) is located the upper end surface of first installation piece (702), hinder piece (704) and be located the front end of extrusion piece (703) upper end surface, reset spring (705) are located the outer wall of support column (701), second installation piece (706) are located the lower extreme surface of support column (701), pull ring (707) is located the lower extreme surface of second installation piece (706), fixed slider (709) are provided with two sets ofly, and are located the both ends internal surface of pull ring (707) respectively, pull ring (708) are provided with two sets ofly, and are located the one end surface of two sets of fixed slider (709) respectively, second stopper (710) are provided with two sets ofly, and are located the other end surface of two sets of fixed slider (709) respectively.

7. A protection device for a frequency converter easy to install according to claim 6, characterized in that: a fixed thread is arranged between the supporting column (701) and the first mounting block (702), the upper end of the outer wall of the supporting column (701) is detachably connected with the inner wall of the lower end of the first mounting block (702) through a fixed thread, the first mounting block (702) is welded with the extrusion block (703), the extrusion block (703) is welded with the blocking block (704), a fixed thread is arranged between the supporting column (701) and the second mounting block (706), the lower end of the outer wall of the supporting column (701) is detachably connected with the inner wall of the upper end of the second mounting block (706) through a fixed thread, the second mounting block (706) is welded with the lifting block (707), a movable groove is arranged between the lifting block (707) and the fixed sliding block (709), the inner wall of the lifting block (707) is movably connected with the outer wall of the fixed sliding block (709) through a movable groove, and a fixed glue is arranged between the lifting block (708) and the fixed sliding block (709), the outer surface of one end of the lifting ring (708) is fixedly connected with the outer surface of one end of the fixed sliding block (709) through fixing glue, and the fixed sliding block (709) and the second limiting block (710) are integrally formed.