CN215982792U

CN215982792U - Anti-freezing device of heating equipment

Info

Publication number: CN215982792U
Application number: CN202122522181.2U
Authority: CN
Inventors: 王晓强
Original assignee: Yingkou Huanying New Energy Heating Equipment Manufacturing Co ltd
Current assignee: Yingkou Huanying New Energy Heating Equipment Manufacturing Co ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-03-08
Anticipated expiration: 2031-10-20

Abstract

The utility model belongs to the field of heating equipment, in particular to an anti-freezing device of heating equipment, which aims at the problems that an electric wall-mounted boiler in the existing heating equipment needs to be prevented from being damaged by the anti-freezing device when the temperature is low in winter, but the existing anti-freezing device can not heat the equipment well and can not save energy, and simultaneously, the anti-freezing device can not remove dust well and can not be used conveniently, the utility model provides the following scheme, which comprises an equipment shell, wherein a fixed box is fixedly connected to the left side of the equipment shell, and a mercury thermometer is fixedly connected to the inner wall of the top of the equipment shell. Simultaneously, the inside of the equipment shell can be dedusted through the dedusting assembly, so that the equipment shell is convenient to use.

Description

Anti-freezing device of heating equipment

Technical Field

The utility model relates to the technical field of heating equipment, in particular to an anti-freezing device of heating equipment.

Background

Heating facilities are heating facilities provided to keep spaces where people live or produce in an appropriate thermal state, and heating is currently performed by wall-hanging furnaces.

The electric wall-mounted boiler in the existing heating equipment needs to be prevented from being damaged by an anti-freezing device when the temperature is low in winter, but the existing anti-freezing device cannot well heat the equipment and is not energy-saving enough, and meanwhile, the anti-freezing device cannot well remove dust from the equipment and is inconvenient to use, so the anti-freezing device of the heating equipment is provided and used for solving the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that in the prior art, when the temperature of an electric wall-mounted boiler in the existing heating equipment is low in winter, the equipment needs to be prevented from being damaged by an anti-freezing device, but the existing anti-freezing device cannot well heat the equipment and is not energy-saving enough, and meanwhile, the anti-freezing device cannot well remove dust from the equipment and is inconvenient to use.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an anti-freezing device of heating equipment comprises an equipment shell, wherein a fixed box is fixedly connected to the left side of the equipment shell, a mercury thermometer is fixedly connected to the inner wall of the top of the equipment shell, a first conducting strip and a second conducting strip are respectively and fixedly connected to the inner wall of the left side of the equipment shell, the right sides of the first conducting strip and the second conducting strip extend into the mercury thermometer, a first storage battery is fixedly connected to the inner wall of the left side of the equipment shell, the second conducting strip is electrically connected with the first storage battery, a control assembly is arranged in the fixed box, a heating box is fixedly connected to the inner wall of the top of the fixed box, an electric heating wire is arranged in the heating box, an air outlet pipe is fixedly connected to the right side of the heating box, the right end of the air outlet pipe extends into the equipment shell, a dust removal assembly is arranged on the heating box, an exhaust fan is fixedly connected to the inner wall of the right side of the fixed box, the input of air exhauster extends to in the equipment casing, the output of air exhauster is connected with the dust removal subassembly, and control assembly and electric heating wire and air exhauster electric connection can make air exhauster and electric heating wire work through control assembly to can carry out circulation heating to the equipment casing, effectually prevent that the equipment casing from being frozen out, and after the temperature rise, can the automatic shutdown heating, it is more energy-conserving, can remove dust, facilitate the use to the equipment casing inside through the dust removal subassembly simultaneously.

Preferably, the control assembly comprises a moving plate, a first conductive block, a second conductive block, two electromagnets, an iron block, a sliding plate, first springs, a connecting plate, a rotating frame and a rectangular plate, the electromagnets are electrically connected with the first conductive block, the tops of the electromagnets are fixedly connected with the inner wall of the top of the fixed box, the electromagnets are attracted to the top of the iron block, the bottom of the iron block is fixedly connected with the top of the sliding plate, the top ends of the two first springs are fixedly connected with the bottom of the sliding plate, the bottom ends of the two first springs are fixedly connected with the inner wall of the bottom of the fixed box, the right side of the sliding plate is fixedly connected with the left side of the connecting plate, the bottom of the connecting plate is provided with a roller, the bottom of the fixed box is fixedly connected with a supporting plate, the middle bottom of the rotating frame is rotatably connected with the supporting plate, and the roller is rotatably connected with the inner wall of the top of the left side of the rotating frame, the left side of the rectangular plate is connected with a sliding block in a sliding mode, the right side of the rotating frame is connected with the left side of the sliding block in a rotating mode, the right side of the rectangular plate is fixedly connected with the left side of the top of the movable plate, the bottom of the movable plate is connected with the inner wall of the bottom of the fixed box in a sliding mode, the right side of the first conductive block is fixedly connected with the left side of the movable plate, the left side of the movable plate is fixedly connected with a second storage battery, the first conductive block is electrically connected with the second storage battery, the bottom of the second conductive block is fixedly connected with the inner wall of the bottom of the fixed box, the electric heating wire and the exhaust fan are electrically connected with the second conductive block, when extremely cold weather in winter occurs, mercury in the mercury thermometer can descend, so that the electromagnet in the control assembly is powered off, the electromagnet can lose attraction to the iron block, the sliding plate can drive the connecting plate to move downwards, and the rotating frame can rotate, can make the rectangular plate drive the movable plate like this and remove, make first conducting block and second conducting block contact, thereby can make air exhauster and electric heating wire circular telegram work, the air exhauster can take out the cold air in the equipment casing, gaseous can get into the heating cabinet in, the heating cabinet can be with the gas heating back, in transmitting to the equipment casing, blow to the equipment casing through hot-blast, can make the temperature in the equipment casing evenly rise, and can the circulation heating, effectually prevent that the equipment casing from being frozen out, and after the temperature rises, can the automatic shutdown heating, and is more energy-conserving.

Preferably, the dust removal assembly comprises a filter box, a filter screen and a rectangular seat, the top of the rectangular plate is fixedly connected with the bottom of the rectangular seat, the bottom of the filter screen is fixedly connected with a rectangular column, the bottom of the rectangular column is fixedly connected with a transmission column, the rectangular seat is provided with an inclined hole, the front end of the transmission column is slidably connected with the inner wall of the inclined hole, the right side of the filter box is fixedly connected with the left side of the heating box, the right side of the filter box is provided with a through hole communicated with the heating box, the output end of the exhaust fan is fixedly connected with the left side of the filter box, the top of the filter screen extends into the filter box, when the rectangular plate moves leftwards, the rectangular seat can move leftwards, so that the rectangular column drives the filter screen to move upwards, when the first conductive block is contacted with the second conductive block, the top of the filter screen can be attached to the inner wall of the top of the filter box, and the exhaust fan can not only take out cold air, can also take the dust in the equipment casing out, the filter screen can filter the dust to the rose box in to reached the purpose of removing dust, and all be equipped with the chamber door on fixed case and the rose box, through opening two chamber doors, be convenient for clear up filter screen and rose box inside, facilitate the use.

Preferably, a limiting groove is formed in the inner wall of the left side of the fixed box, the left side of the sliding plate is connected with the inner wall of the left side of the limiting groove in a sliding mode, and the limiting groove enables the sliding plate to move stably.

Preferably, fixedly connected with second spring on the bottom inner wall of fixed case, the top and the rotating turret fixed connection of second spring, the second spring can provide reset power for the rotating turret.

Preferably, the sliding groove is formed in the left side of the rectangular plate, the right side of the sliding block is connected with the inner wall of the right side of the sliding groove in a sliding mode, and the sliding groove enables the sliding block to move more smoothly.

Has the advantages that: when meetting winter very cold weather, can make mercury in the mercury thermometer descend, thereby can make the electro-magnet outage in the control assembly, the electro-magnet can lose the attraction to the iron plate, thereby can make the sliding plate drive the connecting plate downstream, and then can make the rotating turret rotate, can make the rectangular plate drive the movable plate and remove like this, make first conducting block and second conducting block contact, thereby can make air exhauster and electric heating wire circular telegram work, the air exhauster can take out the cold air in the equipment casing, gas can get into the heating cabinet, the heating cabinet can be with the gas heating after, in transmission to the equipment casing, blow to the equipment casing through hot-blast, can make the temperature in the equipment casing evenly rise, and can the circulation heating, effectually prevent that the equipment casing from being frozen out, and after the temperature rises, can the automatic shutdown heating, and energy saving is more.

When the rectangular plate moved left, can make the rectangle seat in the dust removal subassembly move left, thereby can make the rectangle post drive the filter screen rebound, when first conducting block and second conducting block contacted, the top of filter screen can be laminated with the top inner wall of rose box mutually, the air exhauster can not only take cold air out, can also take the dust in the equipment casing out, the filter screen can filter the dust to the rose box in, thereby the mesh of removing dust has been reached, and all be equipped with the chamber door on fixed box and the rose box, through opening two chamber doors, be convenient for clear up filter screen and rose box inside, and is convenient for use.

The device has the advantages of reasonable structure and convenience in operation, the exhaust fan and the electric heating wire can work through the control assembly, so that the device shell can be heated circularly, the device shell is effectively prevented from being frozen, heating can be automatically stopped after the temperature rises, energy is saved, and meanwhile, dust can be removed from the inside of the device shell through the dust removal assembly, so that the device is convenient to use.

Drawings

FIG. 1 is a schematic front view of an anti-freeze apparatus of a heating apparatus according to the present invention;

FIG. 2 is a schematic diagram of a main sectional view of an anti-freezing device of a heating apparatus according to the present invention;

FIG. 3 is a schematic sectional view of a fixed box of an anti-freezing device of a heating apparatus according to the present invention;

fig. 4 is an enlarged schematic view of a portion a of an anti-freeze apparatus of a heating apparatus according to the present invention.

In the figure: the device comprises a device shell 1, a fixed box 2, a mercury thermometer 3, a first conducting strip 4, a second conducting strip 5, a heating box 6, an electric heating wire 7, an exhaust fan 8, a moving plate 9, a first conducting strip 10, a second conducting strip 11, an electromagnet 12, an iron block 13, a sliding plate 14, a first spring 15, a connecting plate 16, a rotating frame 17, a rectangular plate 18, a sliding block 19, a sliding groove 20, a second spring 21, a rectangular seat 22, a filter box 23, a filter screen 24 and a limiting groove 25.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-4, an anti-freezing device for heating equipment comprises an equipment shell 1, a fixed box 2 is fixedly connected to the left side of the equipment shell 1, a mercury thermometer 3 is fixedly connected to the inner wall of the top of the equipment shell 1, mercury is arranged in the mercury thermometer 3, a first conducting strip 4 and a second conducting strip 5 are respectively and fixedly connected to the inner wall of the left side of the equipment shell 1, the right sides of the first conducting strip 4 and the second conducting strip 5 extend into the mercury thermometer 3, the mercury can serve as a conducting medium, so that the first conducting strip 4 can be electrified, a first storage battery is fixedly connected to the inner wall of the left side of the equipment shell 1, the second conducting strip 5 is electrically connected with the first storage battery, the first storage battery can provide power for the second conducting strip 5, a control assembly is arranged in the fixed box 2, a heating box 6 is fixedly connected to the inner wall of the top of the fixed box 2, an electric heating wire 7 is arranged in a heating box 6, the right side of the heating box 6 is fixedly connected with an air outlet pipe, the right end of the air outlet pipe extends into an equipment shell 1, a dust removal component is arranged on the heating box 6, an exhaust fan 8 is fixedly connected on the inner wall of the right side of a fixed box 2, the input end of the exhaust fan 8 extends into the equipment shell 1, the output end of the exhaust fan 8 is connected with the dust removal component, a control component is electrically connected with the electric heating wire 7 and the exhaust fan 8, the control component comprises a moving plate 9, a first conductive block 10, a second conductive block 11, an electromagnet 12, an iron block 13, a sliding plate 14, a first spring 15, a connecting plate 16, a rotating frame 17 and a rectangular plate 18, the electromagnet 12 is electrically connected with a first conductive plate 4, under the condition that the first conductive plate 4 is electrified, the electromagnet 12 is magnetic, the top of the electromagnet 12 is fixedly connected with the inner wall of the top of the fixed box 2, the electromagnet 12 is attracted with the top of the iron block 13, the bottom of the iron block 13 is fixedly connected with the top of the sliding plate 14, the number of the first springs 15 is two, the top ends of the two first springs 15 are fixedly connected with the bottom of the sliding plate 14, the bottom ends of the two first springs 15 are fixedly connected with the bottom inner wall of the fixed box 2, the magnetic force of the electromagnet 12 is larger than the elastic force of the two first springs 15, the right side of the sliding plate 14 is fixedly connected with the left side of the connecting plate 16, the bottom of the connecting plate 16 is provided with rollers, the bottom of the fixed box 2 is fixedly connected with a supporting plate, the middle bottom of the rotating frame 17 is rotatably connected with the supporting plate, the rollers are rotatably connected with the left side top inner wall of the rotating frame 17, the left side of the rectangular plate 18 is slidably connected with a sliding block 19, the right side of the rotating frame 17 is rotatably connected with the left side of the sliding block 19, the right side of the rectangular plate 18 is fixedly connected with the top left side of the moving plate 9, and the bottom of the moving plate 9 is slidably connected with the bottom inner wall of the fixed box 2, the right side of the first conductive block 10 is fixedly connected with the left side of the movable plate 9, the left side of the movable plate 9 is fixedly connected with a second storage battery, the second storage battery can provide power for the first conductive block 10, the first conductive block 10 is electrically connected with the second storage battery, the bottom of the second conductive block 11 is fixedly connected with the inner wall of the bottom of the fixed box 2, the electric heating wire 7 and the exhaust fan 8 are both electrically connected with the second conductive block 11, when extremely cold weather in winter occurs, mercury in the mercury thermometer 3 can be lowered, so that the electromagnet 12 in the control assembly can be powered off, the electromagnet 12 can lose attraction to the iron block 13, so that the sliding plate 14 can drive the connecting plate 16 to move downwards, and the rotating frame 17 can rotate, so that the rectangular plate 18 can drive the movable plate 9 to move, the first conductive block 10 is in contact with the second conductive block 11, so that the exhaust fan 8 and the electric heating wire 7 can be powered on, the device comprises an equipment shell 1, an exhaust fan 8, a heating box 6, a control assembly, an electric heating wire 7, a control assembly and a control assembly, wherein the exhaust fan 8 can exhaust cold air in the equipment shell 1, the gas can enter the heating box 6, the heating box 6 can heat the gas and transmit the gas into the equipment shell 1, the hot air blows the equipment shell 1, the temperature in the equipment shell 1 can be uniformly increased, the gas can be circularly heated, the equipment shell 1 is effectively prevented from being frozen, the heating can be automatically stopped after the temperature is increased, and the device is more energy-saving.

In the utility model, the left inner wall of the fixed box 2 is provided with a limit groove 25, the left side of the sliding plate 14 is connected with the left inner wall of the limit groove 25 in a sliding way, and the limit groove 25 can ensure that the sliding plate 14 can move stably.

In the utility model, the inner wall of the bottom of the fixed box 2 is fixedly connected with the second spring 21, the top end of the second spring 21 is fixedly connected with the rotating frame 17, the second spring 21 can provide reset power for the rotating frame 17, and the elastic force of the second spring 21 is smaller than the elastic force of the two second springs 15.

In the utility model, the sliding groove 20 is formed in the left side of the rectangular plate 18, the right side of the sliding block 19 is in sliding connection with the inner wall of the right side of the sliding groove 20, and the sliding groove 20 can enable the sliding block 19 to move more smoothly.

In the utility model, the dust removing component comprises a filter box 23, a filter screen 24 and a rectangular seat 22, the top of a rectangular plate 18 is fixedly connected with the bottom of the rectangular seat 22, the bottom of the filter screen 24 is fixedly connected with a rectangular column, the bottom end of the rectangular column is fixedly connected with a transmission column, the rectangular seat 22 is provided with an inclined hole, the front end of the transmission column is in sliding connection with the inner wall of the inclined hole, when the rectangular seat 22 moves transversely, the rectangular column can move longitudinally, the right side of the filter box 23 is fixedly connected with the left side of a heating box 6, the right side of the filter box 23 is provided with a through hole communicated with the heating box 6, the output end of an exhaust fan 7 is fixedly connected with the left side of the filter box 23, the top of the filter screen 24 extends into the filter box 23, the filter screen 24 can filter dust in the equipment shell 1 to achieve the purpose of dust removal, when the rectangular plate 18 moves leftwards, the rectangular seat 22 can move leftwards, so that the rectangular column drives the filter screen 24 to move upwards, when first conducting block 10 contacts with second conducting block 11, the top of filter screen 24 can laminate mutually with the top inner wall of rose box 23, air exhauster 8 not only can take cold air out, can also take the dust in equipment housing 1 out, filter screen 24 can filter the dust to in the rose box 23, thereby reached the purpose of removing dust, and all be equipped with the chamber door on fixed box 2 and the rose box 23, through opening two chamber doors, be convenient for clear up filter screen 24 and rose box 23 inside, facilitate the use.

The working principle is as follows: when the device is used in particular, when the weather is low in winter, the temperature in the device shell 1 is reduced, the mercury in the mercury thermometer 3 is reduced when the mercury is cooled, when the mercury is reduced to the position below the first conducting strip 4, a conducting medium is lacked between the first conducting strip 4 and the second conducting strip 5, and the first conducting strip 4 is powered off, so that the electromagnet 12 is powered off, the electromagnet 12 loses magnetism when the power is off, and then loses attraction to the iron block 13, under the action of the two first springs 15, the sliding plate 14 can move downwards, the sliding plate 14 can drive the connecting plate 16 to move downwards, so that the rotating frame 17 can rotate by taking the supporting plate as a base point, the right side of the rotating frame 17 can rotate towards the upper left side, so that the rectangular plate 18 can move towards the left, the rectangular plate 18 can drive the moving plate 9 to move towards the left, so that the first conducting block 10 can move towards the direction close to the second conducting block 11 and contact with the second conducting block 11, when the rectangular plate 18 moves leftwards, the rectangular seat 22 moves leftwards, so that the rectangular column can drive the filter screen 24 to move upwards, when the first conductive block 10 is in contact with the second conductive block 11, the top of the filter screen 24 can be attached to the inner wall of the top of the filter box 23, the first conductive block 10 is in contact with the second conductive block 11, the exhaust fan 8 and the electric heating wire 7 can be powered on, the exhaust fan 8 can exhaust cold air in the equipment shell 1, the air can enter the heating box 6 after being filtered by the filter screen 24, the heating box 6 can heat the air, the air is transmitted into the equipment shell 1 and blown to the equipment shell 1 by hot air, the temperature in the equipment shell 1 can be uniformly raised, the circulation heating can be realized, the equipment shell 1 is effectively prevented from being frozen, meanwhile, the exhaust fan 8 can also exhaust dust in the equipment shell 1, and the purpose of dust removal can be achieved, when the temperature in equipment housing 1 rises, mercury in the mercury thermometer 3 can rise gradually, when mercury rises to contact with first conducting strip 4, can make first conducting strip 4 circular telegram, and then can make electro-magnet 12 circular telegram, electro-magnet 12 can adsorb iron plate 13, thereby can make air exhauster 8 and electric heating wire 7 outage, the stop heating, it is more energy-conserving like this, and filter screen 24 can remove to the bottom below of rose box 23, be convenient for clear up filter screen 24, all be equipped with the chamber door on fixed box 2 and the rose box 23 simultaneously, the convenience is opened fixed box 2 and rose box 23, and then can clear up rose box 23 and filter screen 23, the convenient part to fixed box 2 of examining and repairing simultaneously.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides an antifreezing device of heating equipment, includes equipment housing (1), its characterized in that, the left side of equipment housing (1) is fixedly connected with fixed box (2), fixedly connected with mercury thermometer (3) on the top inner wall of equipment housing (1), be fixedly connected with first conducting strip (4) and second conducting strip (5) respectively on the left side inner wall of equipment housing (1), the right side of first conducting strip (4) and second conducting strip (5) all extends to in mercury thermometer (3), fixedly connected with first battery on the left side inner wall of equipment housing (1), second conducting strip (5) and first battery electric connection, be equipped with control assembly in fixed box (2), fixedly connected with heating cabinet (6) on the top inner wall of fixed box (2), be equipped with electric heating wire (7) in heating cabinet (6), the utility model discloses an air conditioner, including heating cabinet (6), fixedly connected with goes out the tuber pipe on the right side of heating cabinet (6), goes out the right-hand member of tuber pipe and extends to in equipment casing (1), be equipped with the dust removal subassembly on heating cabinet (6), fixedly connected with air exhauster (8) on the right side inner wall of fixed box (2), the input of air exhauster (8) extends to in equipment casing (1), the output of air exhauster (8) is connected with the dust removal subassembly, control assembly and electric heating wire (7) and air exhauster (8) electric connection.

2. The antifreeze apparatus of heating equipment according to claim 1, wherein the control assembly comprises a moving plate (9), a first conductive block (10), a second conductive block (11), an electromagnet (12), an iron block (13), a sliding plate (14), first springs (15), a connecting plate (16), a rotating frame (17) and a rectangular plate (18), the electromagnet (12) is electrically connected with the first conductive plate (4), the top of the electromagnet (12) is fixedly connected with the inner wall of the top of the fixed box (2), the electromagnet (12) is attracted to the top of the iron block (13), the bottom of the iron block (13) is fixedly connected with the top of the sliding plate (14), the number of the first springs (15) is two, the top ends of the two first springs (15) are fixedly connected with the bottom of the sliding plate (14), the bottom ends of the two first springs (15) are fixedly connected with the inner wall of the bottom of the fixed box (2), the right side of the sliding plate (14) is fixedly connected with the left side of the connecting plate (16), the bottom of the connecting plate (16) is provided with a roller, the bottom of the fixed box (2) is fixedly connected with a supporting plate, the middle bottom position of the rotating frame (17) is rotatably connected with the supporting plate, the roller is in rolling connection with the inner wall of the top of the left side of the rotating frame (17), the left side of the rectangular plate (18) is in sliding connection with a sliding block (19), the right side of the rotating frame (17) is rotatably connected with the left side of the sliding block (19), the right side of the rectangular plate (18) is fixedly connected with the left side of the top of the movable plate (9), the bottom of the movable plate (9) is in sliding connection with the inner wall of the bottom of the fixed box (2), the right side of the first conductive block (10) is fixedly connected with the left side of the movable plate (9), and the left side of the movable plate (9) is fixedly connected with a second storage battery, first conducting block (10) and second battery electric connection, the bottom of second conducting block (11) and the bottom inner wall fixed connection of fixed case (2), electric heating wire (7) and air exhauster (8) all with second conducting block (11) electric connection.

3. The anti-freezing device of heating equipment of claim 2, characterized in that the dust removing component comprises a filter box (23), a filter screen (24) and a rectangular seat (22), the top of the rectangular plate (18) is fixedly connected with the bottom of the rectangular seat (22), the bottom of the filter screen (24) is fixedly connected with a rectangular column, the bottom of the rectangular column is fixedly connected with a transmission column, the rectangular seat (22) is provided with an inclined hole, the front end of the transmission column is slidably connected with the inner wall of the inclined hole, the right side of the filter box (23) is fixedly connected with the left side of the heating box (6), the right side of the filter box (23) is provided with a through hole communicated with the heating box (6), the output end of the exhaust fan (8) is fixedly connected with the left side of the filter box (23), and the top of the filter screen (24) extends into the filter box (23).

4. The antifreeze apparatus for heating equipment according to claim 2, wherein a limiting groove (25) is formed on the left inner wall of the fixed box (2), and the left side of the sliding plate (14) is slidably connected with the left inner wall of the limiting groove (25).

5. The antifreeze apparatus of heating equipment as claimed in claim 2, wherein a second spring (21) is fixedly connected to the inner wall of the bottom of the fixed box (2), and the top end of the second spring (21) is fixedly connected to the rotating frame (17).

6. The antifreeze apparatus for heating equipment according to claim 2, wherein a slide groove (20) is formed at the left side of the rectangular plate (18), and the right side of the slide block (19) is slidably connected with the inner wall of the right side of the slide groove (20).