CN111172490A

CN111172490A - Anti-oxidation plasma paint spraying processing electromechanical equipment

Info

Publication number: CN111172490A
Application number: CN202010009610.3A
Authority: CN
Inventors: 程利祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-05-19

Abstract

The invention discloses an anti-oxidation plasma paint spraying processing electromechanical device, which structurally comprises a device connecting frame, an operating handle, a plasma spray head, a powder feeding pipe joint, a paint spraying gun main body and an electrode connecting head, wherein the device connecting frame and a mechanical arm are fixed together through bolts, the operating handle is connected with the device connecting frame through threads, the left end of the paint spraying gun main body is buckled with the right side of the device connecting frame, and the plasma paint spraying processing electromechanical device is provided with a powder homogenizing nozzle, so that metal powder can be effectively contacted with the center of plasma jet flow, the condition that the jet flow powder is incompletely molten due to nonuniform heating of the metal powder is avoided, meanwhile, the metal powder is prevented from being oxidized by oxidizing gas in the jet flow, and the quality of plasma spraying and the performance of a device coating are improved.

Description

Anti-oxidation plasma paint spraying processing electromechanical equipment

Technical Field

The invention relates to the field of hardware paint spraying, in particular to an anti-oxidation plasma paint spraying processing electromechanical device.

Background

With the progress of science and technology, in order to reduce the weight of an engine, reduce fuel consumption and realize energy conservation and emission reduction in industrial production, automobile manufacturers develop a process for spraying a coating on the surface of an aluminum alloy cylinder hole to replace a traditional embedded cast cylinder sleeve, and a plasma spraying technology is a commonly applied process, but the current technical consideration is not perfect enough and has the following defects: when the plasma spraying device is used, direct current electric arc is generated between a cathode and an anode, meanwhile, high-temperature plasma of an airflow heating layer of a gun body is sprayed out from a nozzle to form plasma flame by the electric arc, metal powder is fed into plasma jet flow and then is melted and sprayed onto the surface of an engine in an accelerating mode to form a coating, however, the motion trail of the metal powder is divergent after the metal powder enters the plasma jet flow and cannot enter the center of the plasma jet flow completely, the metal powder is heated unevenly by the plasma jet flow, the phenomenon that the jet flow powder is melted incompletely is caused, meanwhile, the metal powder is easily oxidized by oxidative gas sucked in the jet flow, and the spraying efficiency and the performance of the coating are reduced.

Disclosure of Invention

In order to solve the problems, the invention provides an anti-oxidation plasma paint spraying processing electromechanical device.

In order to achieve the purpose, the invention is realized by the following technical scheme: an anti-oxidation plasma paint spraying processing electromechanical device structurally comprises a device connecting frame, an operating handle, a plasma spray head, a powder feeding pipe joint, a paint spraying gun main body and an electrode connector, wherein the device connecting frame and a mechanical arm are fixed together through bolts, the operating handle is in threaded connection with the device connecting frame, the left end of the paint spraying gun main body is buckled with the right side of the device connecting frame, the plasma spray head is embedded below the paint spraying gun main body, the powder feeding pipe joint is installed on the right side of the paint spraying gun main body, the power connector is connected to the top of the paint spraying gun main body in a penetrating mode, the plasma spray head is composed of an insulator, a cathode rod, a powder homogenizing nozzle, an anode rod and a spray head shell, the spray head shell and the paint spraying gun main body are connected together through threads, the powder homogenizing nozzle is located at the bottom of the spray head shell, and the insulator is embedded at the top end in, the cathode rod is arranged in the middle of the cathode rod, the anode rod is positioned below the cathode rod, and the powder homogenizing nozzle is communicated with the anode rod.

As a further improvement of the invention, the powder homogenizing nozzle is composed of a driving structure, a nozzle outer cover, a powder conveying device, an anti-oxidation protection structure and a conveying gas pipe, wherein the nozzle outer cover and the sprayer housing are mutually buckled, the anti-oxidation protection structure is nested at the bottom of the nozzle outer cover, the driving structure is arranged on the upper surface of the nozzle outer cover, the powder conveying device and the driving structure are mutually buckled, the conveying gas pipe is nested at the inner side of the nozzle outer cover, and the driving structure, the powder conveying device and the anti-oxidation protection structure are mutually communicated from top to bottom.

As a further improvement of the invention, the driving structure consists of an airflow clapboard, a plasma circulation hole, a driving structure outer cover, a retainer and an airflow transmission ring frame, wherein the driving structure outer cover is arranged below the anode rod, the retainer is positioned at the right side of the driving structure outer cover and is buckled with the driving structure outer cover, the airflow clapboard is connected in the middle of the driving structure outer cover in a penetrating way, the plasma circulation hole is positioned in the airflow clapboard, the airflow transmission ring frame and the airflow clapboard are in clearance fit, and the airflow clapboard and the airflow transmission ring frame are vertical to each other.

As a further improvement of the invention, the powder conveying device comprises a drainage spiral disc, a powder inlet, a spiral disc driving frame, a fixed spiral disc, a powder melting nozzle, a crescent cavity and a conveyor shell, wherein the conveyor shell is nested in the middle of the top of a nozzle outer cover, the spiral disc driving frame is mutually buckled with an airflow transmission ring frame, the drainage spiral disc is welded with the spiral disc driving frame, the fixed spiral disc and the conveyor shell form an integrated structure, the powder melting nozzle is welded with the middle of the conveyor shell, the powder inlet is connected to the left end of the conveyor shell in a penetrating way, the crescent cavity is nested between the drainage spiral disc and the fixed spiral disc, and the powder melting nozzle is collinear with the axle center of the conveyor shell.

As a further improvement of the invention, the anti-oxidation protection structure consists of an airflow inlet, an anti-oxidation wind wall frame, a wind wall discharge hole, a wind wall frame fixing ring, a rotary traction structure and an airflow shifting sheet, wherein the wind wall frame fixing ring is buckled with the bottom of the nozzle outer cover, the anti-oxidation wind wall frame and the wind wall frame fixing ring are buckled with each other, the wind wall discharge hole is uniformly distributed on the surface of the anti-oxidation wind wall frame at equal intervals, the rotary traction structure is positioned around the anti-oxidation wind wall frame, the airflow inlet is connected to the top of the wind wall frame fixing ring in a penetrating way, the airflow shifting sheet and the anti-oxidation wind wall frame form an integrated structure, and the anti-oxidation wind wall frame and the wind wall frame fixing ring are of a hollow annular structure and have collinear axes.

As a further improvement of the invention, the rotary traction structure comprises two buckling push blocks, two push block fixed guide rails, two self-resetting springs, two sliding grooves and two rotary slide blocks, wherein the rotary slide blocks and the anti-oxidation wind wall frame form an integrated structure, the push block fixed guide rails are nested at the upper end and the lower end of the rotary slide blocks, the buckling push blocks and the push block fixed guide rails are in clearance fit, the self-resetting springs are nested in the push block fixed guide rails, the sliding grooves are arranged on the inner sides of the anti-oxidation wind wall frame, and the push block fixed guide rails are arranged and are symmetrical front and back with the center lines of the rotary slide blocks.

As a further improvement of the invention, the right side of the airflow transmission ring frame is buckled with the spiral disc driving frame and is eccentrically connected, so that when the airflow transmission ring frame rotates, the spiral disc driving frame drives the drainage spiral disc to rotate and rotate horizontally, the crescent cavity is promoted to change periodically, metal powder is sucked into the middle of the spiral disc driving frame and is contacted with plasma jet ejected by the powder melting nozzle, and the plasma jet is promoted to heat the metal powder more uniformly.

As a further improvement of the invention, the arc-shaped grooves buckled with the buckling push blocks are installed in the sliding grooves in a staggered mode, so that when the anti-oxidation air wall frame rotates, the self-resetting springs push the buckling push blocks to be buckled and vibrated with the arc-shaped grooves, vibration waves are formed on the fixing rings of the air wall frame, the metal powder on the fixing rings of the air wall frame and the powder melting nozzle is completely discharged, and the metal powder is prevented from being bonded.

The invention has the beneficial effects that: plasma processing electromechanical device that sprays paint is through installing powder homogeneity nozzle, can effectually contact metal powder and plasma jet center, and it is inhomogeneous to avoid metal powder to heat, causes the condition of the incomplete phenomenon of efflux powder melting, avoids metal powder to be oxidized by oxidizing gaseous in the efflux simultaneously, has promoted the quality of plasma spraying and the performance of equipment coating.

When the powder homogenizing nozzle is used, working gas is fed firstly, flows downwards from the middle of an anode rod and enters the inner part of the outer cover of the driving structure, and is divided into two paths of gas flows through the gas flow partition plate, one path of gas flows along the plasma circulation hole, the other path of gas flows through the gas flow transmission ring frame and drives the gas flow transmission ring frame to rotate, metal powder carrying gas flows is fed into the gun body at the moment, and therefore the powder enters the shell of the conveyor from the powder inlet, the gas flow transmission ring frame drives the drainage spiral disc to rotate and rotate horizontally through the spiral disc driving frame, the crescent cavity is driven to change periodically, meanwhile, the metal powder is sucked into the middle of the spiral disc driving frame and is in complete contact with plasma jet flow sprayed by the powder melting nozzle, and the quality of plasma spraying and the performance of equipment coatings are improved.

Drawings

FIG. 1 is a schematic structural diagram of an anti-oxidation plasma spray painting electromechanical device according to the present invention.

FIG. 2 is a schematic cross-sectional structural view of a plasma showerhead according to the present invention.

FIG. 3 is a schematic structural diagram of the powder homogenizing nozzle according to the present invention.

Fig. 4 is a detailed structural diagram of the driving structure of the present invention.

FIG. 5 is a schematic top view of the powder conveying apparatus according to the present invention.

Fig. 6 is a schematic structural view of the oxidation protection structure of the present invention viewed from above.

Fig. 7 is a detailed structural schematic diagram of the rotary traction structure of the present invention.

In the figure: equipment connecting frame-1, operating handle-2, plasma spray head-3, powder feeding pipe joint-4, spray gun main body-5, electrode connecting head-6, insulator-3 a, cathode rod-3 b, powder homogenizing nozzle-3 c, anode rod-3 d, spray head shell-3 e, driving structure-c 1, nozzle outer cover-c 2, powder conveying device-c 3, anti-oxidation protection structure-c 4, conveying gas pipe-c 5, airflow baffle-c 11, plasma flow through hole-c 12, driving structure outer cover-c 13, retainer-c 14, airflow transmission ring frame-c 15, drainage spiral disc-c 31, powder inlet-c 32, spiral disc driving frame-c 33, fixed spiral disc-c 34, powder melting nozzle-c 35, Crescent cavity-c 36, conveyor shell-c 37, airflow inlet-c 41, anti-oxidation wind wall frame-c 42, wind wall discharge hole-c 43, wind wall frame fixing ring-c 44, rotary traction structure-c 45, airflow shifting piece-c 46, buckling push block-451, push block fixing guide rail-452, self-reset spring-453, sliding groove-454 and rotary sliding block-455.

Detailed Description

In order to make the technical means, the creation features, the achievement objects and the effects of the invention easy to understand, fig. 1 to 7 schematically show the structure of the electromechanical equipment for plasma paint spraying processing according to the embodiment of the invention, and the invention is further described below with reference to the specific embodiment.

Example one

Referring to fig. 1-5, the invention provides an anti-oxidation electromechanical device for plasma paint spraying processing, which structurally comprises a device connecting frame 1, an operating handle 2, a plasma spray head 3, a powder feeding pipe joint 4, a paint spray gun main body 5 and an electrode connecting head 6, wherein the device connecting frame 1 is fixed with a mechanical arm through bolts, the operating handle 2 is connected with the device connecting frame 1 through threads, the left end of the paint spray gun main body 5 is buckled with the right side of the device connecting frame 1, the plasma spray head 3 is nested below the paint spray gun main body 5, the powder feeding pipe joint 4 is arranged at the right side of the paint spray gun main body 5, the power connecting head 6 is connected with the top of the paint spray gun main body 5 in a penetrating manner, the plasma spray head 3 consists of an insulator 3a, a cathode rod 3b, a powder homogenizing nozzle 3c, an anode rod 3d and a spray head shell 3e, the spray head shell 3e is connected with the paint spray gun main body 5 through threads, the powder homogenizing nozzle 3c is located at the bottom of the sprayer shell 3e, the insulator 3a is nested at the top end in the sprayer shell 3e, the cathode rod 3b is installed in the middle of the cathode rod 3b, the anode rod 3d is located below the cathode rod 3b, and the powder homogenizing nozzle 3c is communicated with the anode rod 3 d. The powder homogenizing nozzle 3c is composed of a driving structure c1, a nozzle outer cover c2, a powder conveying device c3, an anti-oxidation protection structure c4 and a conveying air pipe c5, wherein the nozzle outer cover c2 and the sprayer head outer cover 3e are buckled with each other, the anti-oxidation protection structure c4 is nested at the bottom of the nozzle outer cover c2, the driving structure c1 is installed on the upper surface of the nozzle outer cover c2, the powder conveying device c3 and the driving structure c1 are buckled with each other, the conveying air pipe c5 is nested at the inner side of the nozzle outer cover c2, and the driving structure c1, the powder conveying device c3 and the anti-oxidation protection structure c4 are mutually communicated from top to bottom. The driving structure c1 is composed of an air flow partition plate c11, a plasma flow through hole c12, a driving structure outer cover c13, a retainer c14 and an air flow transmission ring frame c15, the driving structure outer cover c13 is installed below the anode rod 3d, the retainer c14 is located on the right side of the driving structure outer cover c13 and buckled with the driving structure outer cover c13, the air flow partition plate c11 is connected to the middle of the driving structure outer cover c13 in a penetrating manner, the plasma flow through hole c12 is located inside the air flow partition plate c11, the air flow transmission ring frame c15 is in clearance fit with the air flow partition plate c11, and the air flow partition plate c11 is perpendicular to the air flow transmission ring frame c 15. The powder conveying device c3 is composed of a flow guiding spiral disk c31, a powder inlet c32, a spiral disk driving frame c33, a fixed spiral disk c34, a powder melting nozzle c35, a crescent cavity c36 and a conveyor housing c37, wherein the conveyor housing c37 is nested in the middle of the top of a nozzle housing c2, the spiral disk driving frame c33 is mutually buckled with an airflow driving ring frame c15, the flow guiding spiral disk c31 is welded with the spiral disk driving frame c33, the fixed spiral disk c34 is in an integrated structure with the conveyor housing c37, the powder melting nozzle c35 is welded with the middle of the conveyor housing c37, the powder inlet c32 is connected to the left end of the conveyor housing c37 in a penetrating way, the crescent cavity c36 is nested between the flow guiding spiral disk c31 and the fixed spiral disk c34, and the powder melting nozzle c35 is axially centered with the conveyor housing c 37. The right side of the air flow transmission ring frame c15 is buckled with the spiral disk driving frame c33 and is eccentrically connected, so when the air flow transmission ring frame c15 rotates, the spiral disk driving frame c33 drives the drainage spiral disk c31 to rotate and rotate horizontally, the crescent cavity c36 is promoted to change periodically, metal powder is further sucked into the middle of the spiral disk driving frame c33 and is contacted with plasma jet sprayed by the powder melting nozzle c35, the plasma jet is promoted to heat the metal powder more uniformly,

when the plasma jet gun is used, a cable switch is firstly switched on, so that an electric arc is generated between the cathode rod 3b and the anode rod 3d, and simultaneously working gas is fed in, the working gas flows downwards from the middle of the anode rod 3d and enters the interior of the outer cover c13 of the driving structure, and is divided into two paths of gas flows through the gas flow partition plate c11, one path of the gas flows along the plasma jet through hole c12, the other path of the gas flows through the gas flow transmission ring c15 and drives the gas flow transmission ring c15 to rotate, and at the moment, metal powder carrying gas flow is fed into the gun body, so that the powder enters the conveyer shell c37 from the powder inlet c32, because the spiral disk driving frame c33 is buckled with the gas flow transmission ring c 7, when the gas flow transmission ring c15 rotates, the spiral disk driving frame c33 drives the drainage spiral disk c31 to make rotary and horizontal rotation movement, so that the crescent cavity c36 generates periodic change, and simultaneously the metal powder is sucked into the middle of the spiral disk driving frame c, the plasma jet is promoted to heat the metal powder more uniformly.

Example two

Referring to fig. 6-7, the anti-oxidation protection structure c4 is composed of an airflow inlet c41, an anti-oxidation wind wall frame c42, a wind wall discharge hole c43, a wind wall frame fixing ring c44, a rotary traction structure c45 and an airflow shifting piece c46, the wind wall frame fixing ring c44 is fastened with the bottom of the nozzle outer cover c2, the anti-oxidation wind wall frame c42 is fastened with the wind wall frame fixing ring c44, the wind wall discharge holes c43 are uniformly distributed on the surface of the anti-oxidation wind wall frame c42 at equal intervals, the rotary traction structure c45 is located around the anti-oxidation wind wall frame 42, the airflow inlet c41 is connected to the top of the wind wall frame fixing ring c44 in a penetrating manner, the airflow shifting piece c46 and the anti-oxidation wind wall frame c42 form an integrated structure, and the anti-oxidation wind wall frame c42 and the wind wall frame fixing ring c44 are of a hollow ring structure and are collinear. The rotary traction structure c45 is composed of a buckling push block 451, a push block fixing guide rail 452, a self-reset spring 453, a sliding groove 454 and a rotary slide block 455, the rotary slide block 455 and an anti-oxidation wind wall frame c42 form an integrated structure, the push block fixing guide rail 452 is nested at the upper end and the lower end of the rotary slide block 455, the buckling push block 451 and the push block fixing guide rail 452 are in clearance fit, the self-reset spring 453 is nested inside the push block fixing guide rail 452, the sliding groove 454 is installed on the inner side of the anti-oxidation wind wall frame c42, and the push block fixing guide rail 452 is provided with two parts and is symmetrical in the front and back direction of the center line of the rotary slide block 455. The arc-shaped grooves buckled with the buckling push block 451 are installed in the sliding groove 454 in a staggered mode, so that when the anti-oxidation wind wall frame c42 rotates, the self-reset spring 453 pushes the buckling push block 451 to be buckled with the arc-shaped grooves to vibrate, vibration waves are formed on the wind wall frame fixing ring c44, metal powder on the wind wall frame fixing ring c44 and the powder melting nozzle c35 is completely discharged, and metal powder adhesion is avoided.

When the air flow flows along the air flow transmission ring frame c15 and then enters the air delivery pipe c5, and simultaneously enters the interior of the air wall frame fixing ring c44 through the air flow inlet c41, and then is sprayed downwards through the air wall discharge hole c43 on the oxidation-proof air wall frame c42, and simultaneously the air flow pushes the air flow stirring sheet c46 to rotate, so that the oxidation-proof air wall frame c42 rotates along the sliding groove 454, the molten metal powder sprayed out of the powder melting nozzle c35 forms a circular air wall, the metal powder is prevented from being easily oxidized by the oxidation gas sucked in the spray flow, and simultaneously the oxidation-proof air wall frame c42 pushes the buckling push block 451 and the arc-shaped groove to be buckled and vibrated through the self-reset spring 453 during the rotation process, and forms a vibration wave on the air wall frame fixing ring c44, so that the air wall frame fixing ring c44 and the metal powder on the powder melting nozzle c35 are completely discharged, the metal powder is prevented from being bonded, and the spraying quality.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides an anti-oxidation plasma processing electromechanical device that sprays paint, its structure includes equipment link (1), operating handle (2), plasma nozzle (3), send whitewashed coupling (4), spray gun main part (5), electrode connection head (6), its characterized in that:

the equipment connecting frame (1) is fixed together with the mechanical arm through a bolt, the operating handle (2) is connected with the equipment connecting frame (1) through threads, the left end of the paint spraying gun main body (5) is buckled with the right side of the equipment connecting frame (1), the plasma spray head (3) is nested below the paint spraying gun main body (5), the powder feeding pipe joint (4) is installed on the right side of the paint spraying gun main body (5), and the power supply connector (6) is connected to the top of the paint spraying gun main body (5) in a penetrating mode;

plasma nozzle (3) comprises insulator (3a), negative pole (3b), powder homogeneity nozzle (3c), positive pole (3d), shower nozzle shell (3e) is in the same place through threaded connection with spray gun main part (5), powder homogeneity nozzle (3c) are located shower nozzle shell (3e) bottom, top in shower nozzle shell (3e) is nested in insulator (3a), negative pole (3b) are installed in the middle of negative pole (3b), positive pole (3d) are located negative pole (3b) below.

2. The oxidation-resistant plasma paint spraying machining electromechanical apparatus of claim 1, characterized in that: the powder homogenizing nozzle (3c) is composed of a driving structure (c1), a nozzle outer cover (c2), a powder conveying device (c3), an anti-oxidation protection structure (c4) and a conveying air pipe (c5), wherein the nozzle outer cover (c2) and a sprayer housing (3e) are buckled with each other, the anti-oxidation protection structure (c4) is nested at the bottom of the nozzle outer cover (c2), the driving structure (c1) is installed on the upper surface of the nozzle outer cover (c2), the powder conveying device (c3) and the driving structure (c1) are buckled with each other, and the conveying air pipe (c5) is nested on the inner side of the nozzle outer cover (c 2).

3. The oxidation-resistant plasma paint spraying machining electromechanical device according to claim 2, characterized in that: the driving structure (c1) is composed of an air flow partition plate (c11), a plasma circulation hole (c12), a driving structure outer cover (c13), a retainer (c14) and an air flow transmission ring frame (c15), wherein the driving structure outer cover (c13) is installed below the anode rod (3d), the retainer (c14) is located on the right side of the driving structure outer cover (c13) and buckled with the driving structure outer cover (c13), the air flow partition plate (c11) is connected to the middle of the driving structure outer cover (c13) in a penetrating mode, the plasma circulation hole (c12) is located inside the air flow partition plate (c11), and the air flow transmission ring frame (c15) and the air flow partition plate (c11) are in clearance fit.

4. The oxidation-resistant plasma paint spraying machining electromechanical device according to claim 2, characterized in that: the powder conveying device (c3) consists of a drainage spiral disc (c31), a powder inlet (c32), a spiral disc driving frame (c33), a fixed spiral disc (c34), a powder melting nozzle (c35), a crescent cavity (c36) and a conveyor shell (c37), the conveyor housing (c37) is nested in the middle of the top of the nozzle housing (c2), the spiral disk driving frame (c33) and the air flow driving ring frame (c15) are buckled with each other, the drainage spiral disk (c31) is welded with a spiral disk driving frame (c33), the fixed spiral disk (c34) is integrated with the conveyor housing (c37), the powder melting nozzle (c35) is welded to the conveyor housing (c37) in the middle, the powder inlet (c32) is connected through the left end of the conveyor housing (c37), the crescent cavity (c36) is nested between the drainage spiral disc (c31) and the fixed spiral disc (c 34).

5. The oxidation-resistant plasma paint spraying machining electromechanical device according to claim 2, characterized in that: the anti-oxidation protection structure (c4) is composed of an airflow inlet (c41), an anti-oxidation wind wall frame (c42), a wind wall discharge hole (c43), a wind wall frame fixing ring (c44), a rotary traction structure (c45) and an airflow shifting sheet (c46), wherein the wind wall frame fixing ring (c44) is buckled with the bottom of the nozzle outer cover (c2), the anti-oxidation wind wall frame (c42) is buckled with the wind wall frame fixing ring (c44), the wind wall discharge holes (c43) are uniformly distributed on the surface of the anti-oxidation wind wall frame (c42) at equal intervals, the rotary traction structure (c45) is positioned around the anti-oxidation wind wall frame (c42), the airflow inlet (c41) is connected to the top of the wind wall frame fixing ring (c44) in a penetrating mode, and the airflow shifting sheet (c46) and the anti-oxidation wind wall frame (c42) form an integrated structure.

6. The oxidation-resistant plasma paint spraying machining electromechanical device according to claim 5, characterized in that: the rotary traction structure (c45) is composed of a buckling push block (451), a push block fixing guide rail (452), a self-reset spring (453), a sliding groove (454) and a rotary slide block (455), the rotary slide block (455) and the anti-oxidation wind wall frame (c42) form an integrated structure, the push block fixing guide rail (452) is nested at the upper end and the lower end of the rotary slide block (455), the buckling push block (451) and the push block fixing guide rail (452) are in clearance fit, the self-reset spring (453) is nested inside the push block fixing guide rail (452), and the sliding groove (454) is installed on the inner side of the anti-oxidation wind wall frame (c 42).