CN112768189A

CN112768189A - Dry-type transformer using solar energy

Info

Publication number: CN112768189A
Application number: CN202011579929.6A
Authority: CN
Inventors: 黄伟
Original assignee: China Zhongbian Group Shanghai Transformer Co ltd
Current assignee: China Zhongbian Group Shanghai Transformer Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-05-07
Anticipated expiration: 2040-12-28
Also published as: CN112768189B

Abstract

The invention relates to the technical field of dry-type transformers and discloses a solar dry-type transformer which comprises a base, wherein the top of the base is fixedly connected with a first support frame, the top of the first support frame is rotatably connected with a cover plate, the top of the base is fixedly connected with a dry-type transformer, the dry-type transformer is positioned in the first support frame and is in contact with the first support frame, the front side of the first support frame is fixedly connected with a first fixing block, and the inside of the first fixing block is of a hollow structure. This utilize dry-type transformer of solar energy obtains fixed back through the position that makes apron and first support frame, and then makes the swing impact of base obtain reducing, makes dry-type transformer obtain protecting, effectively prolongs dry-type transformer's life, has ensured the stability of base simultaneously, prevents to a certain extent that dry-type transformer's inner structure from appearing the damage, and then influences the use of dry-type vary voltage, and then makes the better use that can of dry-type vary voltage.

Description

Dry-type transformer using solar energy

Technical Field

The invention relates to the technical field of dry-type transformers, in particular to a dry-type transformer utilizing solar energy.

Background

A transformer is widely used in daily life, which is a stationary electric appliance, converts a voltage and a current of one level into a voltage and a current of another level of the same frequency between two or more coils using the principle of electromagnetic induction, and transmits electric energy, and is classified into an oil-immersed transformer, a fully-sealed transformer, a combined transformer, and a dry transformer, wherein the dry transformer is widely used in places such as local lighting, high-rise buildings, airports, and docks CNC mechanical devices, and simply, the dry transformer refers to a transformer in which an iron core and a winding are not immersed in insulating oil; some current dry-type transformers are directly fixed by bolts; however, when the dry-type transformer is installed or wind power outside the dry-type transformer is large, the dry-type transformer is easily vibrated, the fixed part of the dry-type transformer is loosened due to vibration of the dry-type transformer, the internal structure of the dry-type transformer is further damaged, and the dry-type transformer is easily subjected to working faults due to continuous vibration of the dry-type transformer, so that line faults are caused, and the use of lines is influenced;

disclosure of Invention

Technical problem to be solved

The invention provides a dry type transformer utilizing solar energy, aiming at the defects of the prior art, and the dry type transformer has the advantages that the shaking force generated by the dry type transformer when the wind power is larger is buffered, the swinging collision force of a base is further reduced, and the like, and the problems that the dry type transformer is easy to vibrate due to the influence when the dry type transformer is installed or the outside wind power is larger, the fixed part of the dry type transformer is loosened due to the vibration of the dry type transformer, the internal structure of the dry type transformer is damaged, and the dry type transformer is easy to have working faults due to the continuous vibration of the dry type transformer, the line faults are caused, and the use of lines is influenced are solved.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an utilize dry-type transformer of solar energy, the on-line screen storage device comprises a base, the first support frame of top fixedly connected with of base, the top of first support frame is rotated and is connected with the apron, the top fixed link of base has dry-type transformer, dry-type transformer is located the inside of first support frame and contacts each other with it, the first fixed block of front side fixedly connected with of first support frame, the inside of first fixed block is hollow structure, the front side fixedly connected with second fixed block of apron, the inside of second fixed block is hollow structure equally, the inside fixedly connected with second sliding tray of second fixed block, the second shifting chute has been seted up to the inside of locating plate, the left side of locating plate bottom is provided with the inclined plane, the constant head tank has been seted up in the left side of locating plate, the power groove has been seted up in the left side of first fixed block, the inside sliding.

Preferably, the inner part of the second fixing block is slidably connected with a positioning plate, the surface of the second sliding groove is slidably connected with the inner part of the second moving groove, the positioning plate is slidably connected with the surface of the second sliding groove through the second moving groove, and the surface of the positioning plate is slidably connected with the inner part of the first fixing block.

Preferably, the right end of the first spring is fixedly connected with the surface of the positioning rod, the first spring is movably sleeved on the positioning rod, and the surface of the positioning rod is connected with the inside of the positioning groove in a sliding mode.

Preferably, the top fixedly connected with third fixed block of base, the top fixedly connected with motor of third fixed block, the output fixedly connected with rotor plate of motor, the front side fixedly connected with dwang of rotor plate, first sliding tray has been seted up in the vertical left side in both sides around the second support frame, the inside of the vertical pole in both sides is hollow structure around the second support frame, the inside of the vertical pole in both sides is provided with the same structure around the second support frame, the inside sliding connection of first sliding tray has the carriage release, the opposite side of the vertical pole of carriage release is provided with the lug, the vertical pole of carriage release can reciprocate in the inside of second support frame, the rear side of carriage release transverse bar is seted up the second sliding tray, the third sliding tray has been seted up to the bottom of fixed plate.

Preferably, the dwang is located the front side of rotor plate and keeps away from centre of a circle department, removes the frame and is the U font, removes the inside that the inside of second support frame is run through and extends to the outside of second support frame in the top of the vertical pole of frame, removes the inside sliding connection of the surface of the vertical pole of frame and second support frame.

Preferably, the inside of the second sliding groove is in sliding connection with the surface of the rotating rod, and the top of the vertical rod of the moving frame is in sliding connection with the inside of the third sliding groove.

Preferably, a first moving groove is formed in the cover plate, the vertical section of the first moving groove is cross-shaped, the first moving groove is connected with a first sliding block in a sliding mode, the top of the first sliding block is connected with a transmission plate in a rotating mode, the bottom of the transmission plate is connected with a second sliding block in a rotating mode, the bottom of the second sliding block is provided with a retarding plate, a first sliding groove is formed in the top of the retarding plate, the first sliding groove is connected with a third sliding block in a sliding mode, and the front side of the third sliding block is fixedly connected with a second spring.

Preferably, the number of the first moving grooves is two, the same structure is arranged inside the two first moving grooves, and the inside of the first sliding groove is connected with the surface of the second sliding block in a sliding mode.

Preferably, the third slider and the second spring are provided with the same structure, and the front end of the second spring is fixedly connected with the rear end of the second slider.

(III) advantageous effects

Compared with the prior art, the invention provides a dry-type transformer utilizing solar energy, which has the following beneficial effects:

1. this utilize dry-type transformer of solar energy, through making the position of apron and first support frame obtain fixed back, the bottom that slows down the board contacts with dry-type transformer's top, when dry-type transformer takes place to rock, slow down the board and reciprocate, make second slider and third slider carry out the relative motion of keeping away from in the inside of first spout, simultaneously because the effort of second spring to third slider and second slider, make dry-type transformer when wind-force is great, the power of shaking that takes place is cushioned, and then make the swing impact of base reduce, make dry-type transformer obtain the protection, effectively prolong dry-type transformer's life, the stability of base has been guaranteed simultaneously, prevent to a certain extent that dry-type transformer's inner structure from appearing the damage, and then influence the use of dry-type vary voltage, and then make the better use of dry-type vary voltage.

2. This utilize dry-type transformer of solar energy, it rotates to connect external power source through the motor and start, make the rotor plate rotate, and then make the dwang carry out eccentric motion and drive and remove the frame and reciprocate, and then realize making the fixed plate rotate, and then make solar panel can follow sun's motion and carry out angle modulation, make solar panel can absorb more sunshine, and then make the utilization ratio of light energy promote to a certain extent, make light energy obtain more utilization, make dry-type transformer can better work, and then make the operative installations that the workman can be more convenient.

3. The dry type transformer using solar energy is manufactured by moving the positioning plate downward inside the second fixing block and sliding into the first fixing block, meanwhile, the left side of the bottom of the positioning plate is provided with the inclined surface, so that when the positioning plate slides downwards, the positioning rod can be pushed to move leftwards, the first spring is compressed, when the positioning groove slides to the right side of the positioning rod, the first spring resets to enable the positioning rod to slide into the positioning groove so as to fix the position of the positioning plate, the cover plate is fixed with the first support frame, the dry-type transformer is fixed more conveniently and rapidly, and when the dry-type transformer breaks down, maintenance workers can install and disassemble the dry-type transformer more conveniently and rapidly, simultaneously, the dry-type transformer can be protected to a certain extent by the first support frame and the cover plate, and the dry-type transformer is prevented from being damaged by objects in the external environment to a certain extent.

4. This utilize dry-type transformer of solar energy, vertical cross-section through the third sliding tray inside is the cross, simultaneously through the lug cooperation with the vertical pole opposite side setting of carriage release, make the carriage release when the inside of third sliding tray removes, the inside of difficult roll-off third sliding tray, and then make the operative installations that the workman can be more convenient, make the device can make things convenient for more to make the carriage release reciprocate to a certain extent, and then make the angle modulation of device more convenient.

5. This utilize dry-type transformer of solar energy, surface through the locating lever and the inside sliding connection of constant head tank, simultaneously through the inclined plane of locating plate bottom, make the locating lever can be more smooth slide in the inside of constant head tank, make the locating plate can remove about the promotion locating lever more smooth when moving down, and then reduced the device to a certain extent and taken place the dead condition of card, and then make the operative installations that the workman can be more convenient, make the use of device more smooth, the inner structure life-span that makes the device at a certain degree obtains certain extension.

Drawings

Fig. 1 is a schematic structural view of a dry type transformer using solar energy according to the present invention;

FIG. 2 is a schematic front plan view of a first fixing block according to the present invention;

FIG. 3 is a schematic view of the top structure of the base of the present invention;

FIG. 4 is a schematic front plan view of a second support frame according to the present invention;

FIG. 5 is a schematic left side view of a second support frame according to the present invention;

FIG. 6 is a schematic left side view of the cover plate according to the present invention.

In the figure: the transformer comprises a base, a dry-type transformer body, a first support frame, a first fixed block, a second fixed block, a solar panel, a fixing plate, a 7 moving frame, a second support frame, a first moving groove, a second fixed block, a first sliding block, a second sliding block, a positioning plate, a 13 cover plate, a 14 rotating plate, a third fixed block, a motor, a 17 transmission plate, a positioning rod, a first sliding groove, a second sliding groove, a rotating rod, a 21 second sliding groove, a second moving groove, a power groove, a first spring, a third sliding groove, a 26 retarding plate, a first sliding groove, a 27 sliding groove, a second sliding block, a second spring.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-2, the present invention provides a technical solution: a dry-type transformer using solar energy comprises a base 1, a first support frame 3 is fixedly connected to the top of the base 1, a cover plate 13 is rotatably connected to the top of the first support frame 3, the cover plate 13 can rotate on the top of the first support frame 3, a dry-type transformer 2 is fixedly connected to the top of the base 1, the dry-type transformer 2 is of a conventional structure and is not described herein in detail, the dry-type transformer 2 is located inside the first support frame 3 and is in contact with the first support frame 3, a first fixing block 4 is fixedly connected to the front side of the first support frame 3, the inside of the first fixing block 4 is of a hollow structure, a second fixing block 10 is fixedly connected to the front side of the cover plate 13, the inside of the second fixing block 10 is of a hollow structure, a second sliding groove 21 is fixedly connected to the inside of the second fixing block 10, a positioning plate 12 is slidably connected to the inside of the second fixing block 10, and, the positioning plate 12 is internally provided with a second moving groove 22, the surface of the second sliding groove 21 is slidably connected with the inside of the second moving groove 22, the positioning plate 12 is slidably connected with the surface of the second sliding groove 21 through the second moving groove 22, the positioning plate 12 can move up and down on the surface of the second sliding groove 21 through the second moving groove 22, the surface of the positioning plate 12 is slidably connected with the inside of the first fixing block 4, the positioning plate 12 can move up and down inside the first fixing block 4, the left side of the bottom of the positioning plate 12 is provided with an inclined surface, the left side of the positioning plate 12 is provided with a positioning groove 31, the left side of the first fixing block 4 is provided with a power groove 23, the inside of the power groove 23 is slidably connected with a positioning rod 18, the positioning rod 18 can move left and right inside the power groove 23, the inner wall of the power groove 23 is fixedly connected with a first spring 24, the right end of, the first spring 24 is movably sleeved on the positioning rod 18, the first spring 24 can be compressed and stretched by the left-right movement of the positioning rod 18, the surface of the positioning rod 18 is in sliding connection with the inside of the positioning groove 31, the positioning rod 18 can slide into and out of the positioning groove 31, and meanwhile, the positioning rod 18 can slide into the positioning groove 31 more smoothly through the inclined surface at the bottom of the positioning plate 12;

the top of the base 1 is fixedly connected with two second support frames 8, the second support frames 8 are inverted E-shaped, the number of the second support frames 8 is two, the two second support frames 8 are arranged on the left side and the right side of the top of the base 1 in a mirror image mode, the two second support frames 8 are provided with the same structure, the top of a vertical rod in the middle of each second support frame 8 is rotatably connected with a fixing plate 6, the fixing plate 6 can rotate on the top of each second support frame 8, the top of each fixing plate 6 is fixedly connected with a solar panel 5, each solar panel 5 is of an existing structure, and not described in any detail herein, the output end of each solar panel 5 is electrically connected with the receiving end of the dry-type transformer 2, and each solar panel 5 can convert collected light energy;

the bottom of the cover plate 13 is coincided with the top of the first support frame 3, the positioning plate 12 is enabled to move downwards in the second fixing block 10 and slide into the first fixing block 4, meanwhile, due to the inclined plane arranged on the left side of the bottom of the positioning plate 12, the positioning plate 12 can push the positioning rod 18 to move leftwards when sliding downwards, the first spring 24 is compressed, when the positioning groove 31 slides to the right side of the positioning rod 18, the first spring 24 resets to enable the positioning rod 18 to slide into the positioning groove 31 so as to fix the position of the positioning plate 12, the cover plate 13 is fixed with the first support frame 3, the dry type transformer 2 is fixed more conveniently and quickly, when the dry type transformer 2 breaks down, a maintenance worker can install and detach the dry type transformer 2 more conveniently and quickly, and the dry type transformer 2 can be protected to a certain extent through the first support frame 3 and the cover plate 13, the dry-type transformer 2 is prevented from being damaged by objects in the external environment to a certain extent;

example two:

referring to fig. 3 to 5, on the basis of the first embodiment, a third fixing block 15 is fixedly connected to the top of the base 1, a motor 16 is fixedly connected to the top of the third fixing block 15, the motor 16 is of a conventional structure and will not be described herein too much, the motor 16 is connected to an external power source for starting, an output end of the motor 16 is fixedly connected to a rotating plate 14, a rotating rod 20 is fixedly connected to the front side of the rotating plate 14, the rotating rod 20 is located at the front side of the rotating plate 14 away from the center of a circle, so that when the rotating plate 14 rotates, the rotating rod 20 can eccentrically rotate along with the rotating plate 14, a first sliding groove 19 is formed in the vertical left side of the front side and the rear side of the second supporting frame 8, the inside of the vertical rods of the front side and the rear side of the second supporting frame 8 is of a hollow structure, the inside of the vertical rods of the front side and the, the movable frame 7 is U-shaped, the top of the vertical rod of the movable frame 7 penetrates through the inside of the second support frame 8 and extends to the outside of the second support frame 8, the surface of the vertical rod of the movable frame 7 is connected with the inside of the second support frame 8 in a sliding manner, the opposite side of the vertical rod of the movable frame 7 is provided with a bump, the vertical rod of the movable frame 7 can move up and down in the inside of the second support frame 8, the rear side of the transverse rod of the movable frame 7 is provided with a second sliding groove 21, the inside of the second sliding groove 21 is connected with the surface of the rotating rod 20 in a sliding manner, the rotating rod 20 can move in the inside of the second sliding groove 21, the bottom of the fixed plate 6 is provided with a third sliding groove 25, the top of the vertical rod of the movable frame 7 is connected with the inside of the third sliding groove 25 in a sliding manner, the movable frame 7 can move in the inside of the third sliding groove, meanwhile, the movable frame 7 is not easy to slide out of the third sliding groove 25 when moving in the third sliding groove 25 by matching with the convex blocks arranged on the opposite sides of the vertical rods of the movable frame 7, so that a worker can use the device more conveniently, and the movable frame 7 can be moved up and down more conveniently to a certain extent;

the motor 16 is connected with an external power supply to start and rotate, so that the rotating plate 14 rotates, the rotating rod 20 performs eccentric motion to drive the moving frame 7 to move up and down, the fixed plate 6 rotates, the solar panel 5 can perform angle adjustment along with the motion of the sun, the solar panel 5 can absorb more sunlight, the utilization rate of light energy is improved to a certain extent, the light energy is utilized more, the dry-type transformer 2 can work better, and workers can use the device more conveniently;

example three:

referring to fig. 6, on the basis of the first embodiment, the cover plate 13 is provided with two first moving grooves 9, the two first moving grooves 9 are provided with the same structure, the vertical cross section of each first moving groove 9 is also cross-shaped, the first moving groove 9 is slidably connected with a first slider 11, the first slider 11 can move inside the first moving groove 9, the top of the first slider 11 is rotatably connected with a transmission plate 17, the transmission plate 17 can rotate on the top of the first slider 11, the bottom of the transmission plate 17 is rotatably connected with a second slider 28, the transmission plate 17 can rotate on the top of the second slider 28, the bottom of the second slider 28 is provided with a retarding plate 26, the top of the retarding plate 26 is provided with a first sliding groove 27, the inside of the first sliding groove 27 is slidably connected with the surface of the second slider 28, the second slider 28 can move inside the first sliding groove 27, a third slide block 30 is connected inside the first slide groove 27 in a sliding manner, the third slide block 30 can move on the first slide groove 27, the third slide block 30 and a second spring 29 are provided with the same structure, the front side of the third slide block 30 is fixedly connected with the second spring 29, and the front end of the second spring 29 is fixedly connected with the rear end of the second slide block 28;

when the cover plate 13 and the first support frame 3 are fixed, the bottom of the retarding plate 26 contacts with the top of the dry-type transformer 2, when the dry-type transformer 2 shakes, the retarding plate 26 moves up and down to make the second slider 28 and the third slider 30 move away from each other in the first sliding groove 27, and meanwhile, because of the acting force of the second spring 29 on the third slider 30 and the second slider 28, the shaking force generated by the dry-type transformer 2 is buffered, so that the swinging impact force of the base 1 is reduced, the dry-type transformer 2 is protected, the service life of the dry-type transformer is effectively prolonged, and the stability of the base 1 is ensured.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A dry-type transformer using solar energy comprises a base (1), and is characterized in that: the top of the base (1) is fixedly connected with a first support frame (3), the top of the first support frame (3) is rotatably connected with a cover plate (13), the top of the base (1) is fixedly connected with a dry-type transformer (2), the dry-type transformer (2) is positioned inside the first support frame (3) and is in contact with the first support frame, the front side of the first support frame (3) is fixedly connected with a first fixed block (4), the inside of the first fixed block (4) is of a hollow structure, the front side of the cover plate (13) is fixedly connected with a second fixed block (10), the inside of the second fixed block (10) is also of a hollow structure, the inside of the second fixed block (10) is fixedly connected with a second sliding groove (21), a second moving groove (22) is formed inside the positioning plate (12), an inclined surface is arranged on the left side of the bottom of the positioning plate (12), and a positioning groove (, a power groove (23) is formed in the left side of the first fixing block (4), a positioning rod (18) is connected to the inside of the power groove (23) in a sliding mode, and a first spring (24) is fixedly connected to the inner wall of the power groove (23).

2. A dry-type transformer using solar energy as recited in claim 1, wherein: the positioning plate (12) is connected to the inner portion of the second fixing block (10) in a sliding mode, the surface of the second sliding groove (21) is connected with the inner portion of the second moving groove (22) in a sliding mode, the positioning plate (12) is connected with the surface of the second sliding groove (21) in a sliding mode through the second moving groove (22), and the surface of the positioning plate (12) is connected with the inner portion of the first fixing block (4) in a sliding mode.

3. A dry-type transformer using solar energy as recited in claim 1, wherein: the right end of the first spring (24) is fixedly connected with the surface of the positioning rod (18), the first spring (24) is movably sleeved on the positioning rod (18), and the surface of the positioning rod (18) is connected with the inner part of the positioning groove (31) in a sliding mode.

4. A dry-type transformer using solar energy as recited in claim 1, wherein: the top of the base (1) is fixedly connected with a third fixed block (15), the top of the third fixed block (15) is fixedly connected with a motor (16), the output end of the motor (16) is fixedly connected with a rotating plate (14), the front side of the rotating plate (14) is fixedly connected with a rotating rod (20), the vertical left sides of the front side and the rear side of the second support frame (8) are provided with a first sliding groove (19), the vertical rods of the front side and the rear side of the second support frame (8) are of a hollow structure, the vertical rods of the front side and the rear side of the second support frame (8) are provided with the same structure, the inner part of the first sliding groove (19) is slidably connected with a moving frame (7), the opposite sides of the vertical rods of the moving frame (7) are provided with convex blocks, the vertical rods of the moving frame (7) can move up and down in the second support frame (8), the rear side of the, the bottom of the fixed plate (6) is provided with a third sliding groove (25).

5. A dry-type transformer using solar energy as set forth in claim 4, wherein: dwang (20) are located the front side of rotor plate (14) and keep away from centre of a circle department, remove frame (7) and be the U font, and the top of removing the vertical pole of frame (7) runs through the inside of second support frame (8) and extends to the outside of second support frame (8), removes the inside sliding connection of the surface of the vertical pole of frame (7) and second support frame (8).

6. A dry-type transformer using solar energy as set forth in claim 4, wherein: the inside of the second sliding groove (21) is in sliding connection with the surface of the rotating rod (20), and the top of the vertical rod of the moving frame (7) is in sliding connection with the inside of the third sliding groove (25).

7. A dry-type transformer using solar energy as recited in claim 1, wherein: first shifting chute (9) have been seted up to the inside of apron (13), the vertical cross-section of first shifting chute (9) is the cross equally, the inside sliding connection of first shifting chute (9) has first slider (11), the top of first slider (11) is rotated and is connected with driving plate (17), the bottom of driving plate (17) is rotated and is connected with second slider (28), the bottom of second slider (28) is provided with slows down board (26), first spout (27) have been seted up at the top that slows down board (26), the inside sliding connection of first spout (27) has third slider (30), the front side fixedly connected with second spring (29) of third slider (30).

8. A dry-type transformer using solar energy as recited in claim 1, wherein: the number of the first moving grooves (9) is two, the same structure is arranged inside the two first moving grooves (9), and the inside of the first sliding groove (27) is connected with the surface of the second sliding block (28) in a sliding mode.

9. A dry-type transformer using solar energy as recited in claim 1, wherein: the third sliding block (30) and the second spring (29) are provided with the same structure, and the front end of the second spring (29) is fixedly connected with the rear end of the second sliding block (28).

10. Use of a dry transformer using solar energy according to claim 1, characterized in that: the cover plate 13 is internally provided with two first moving grooves 9, the two first moving grooves 9 are provided with the same structure, the vertical section of each first moving groove 9 is also cross-shaped, the first moving grooves 9 are internally and slidably connected with first sliders 11, the first sliders 11 can move in the first moving grooves 9, the top of each first slider 11 is rotatably connected with a transmission plate 17, the transmission plate 17 can rotate on the top of each first slider 11, the bottom of each transmission plate 17 is rotatably connected with a second slider 28, the transmission plates 17 can rotate on the top of the second sliders 28, the bottom of each second slider 28 is provided with a retarding plate 26, the top of each retarding plate 26 is provided with a first sliding groove 27, the inside of each first sliding groove 27 is slidably connected with the surface of each second slider 28, and each second slider 28 can move in the first sliding groove 27, a third slide block 30 is connected inside the first slide groove 27 in a sliding manner, the third slide block 30 can move on the first slide groove 27, the third slide block 30 and a second spring 29 are provided with the same structure, the front side of the third slide block 30 is fixedly connected with the second spring 29, and the front end of the second spring 29 is fixedly connected with the rear end of the second slide block 28;