CN209597546U - A dip-coating centrifugal equipment with a feeding device - Google Patents

Abstract

The utility model discloses a dip-coating centrifugal device with a feeding device. The dip-coating centrifugal device with a feeding device comprises a first frame body, a second frame body, a liquid storage box, a material storage box, a centrifugal mechanism and Lifting mechanism, the material storage box is in a mesh structure, the liquid storage box is connected to the lifting mechanism, the material storage box is connected to the centrifugal mechanism, the liquid storage box is arranged inside the first frame, and the The material storage box is arranged inside the liquid storage box, the centrifugal mechanism is arranged inside the second frame, the first frame is welded on the top of the second frame, and the side of the first frame is also provided with There is a feeding mechanism. Through the design of the lifting mechanism and the centrifugal mechanism, the utility model can separate the dacromet coating liquid from the workpiece after the dip coating of the workpiece is completed, and perform centrifugal treatment on the workpiece through the centrifugal mechanism. The utility model saves the workpiece transfer step, improves the work efficiency, and transports the workpiece to the material storage frame through the feeding mechanism, thereby reducing the labor intensity of employees.

Description

A dip-coating centrifugal equipment with a feeding device

technical field

The utility model relates to the technical field of dacromet coating processing, in particular to a dip coating centrifugal device with a feeding device.

Background technique

Dacromet is the transliteration and abbreviation of DACROMET, abbreviated as Dacromet, Dacromet, and Dickron. Domestically named zinc-chromium coating, it is a new type of anti-corrosion coating with zinc powder, aluminum powder, chromic acid and deionized water as the main components.

Dacromet coating process can be roughly divided into dip coating, spray coating, hanging coating and other types, among which dip coating is the main one. In the dip-coating process, the workpiece is first dipped in Dacromet solution, then dried by centrifuge, and then baked to form a film. The above-mentioned dipping and centrifuging processes are carried out separately, and the workpiece needs to be transferred from the dipping equipment to the centrifuging equipment after the dipping is completed, and then the centrifuging process is performed. The above-mentioned process is not only cumbersome, but also requires manpower and material resources during the transfer process, which affects work efficiency. At the same time, it is usually carried manually when putting the workpiece into the Dacromet solution, so the labor intensity of the employees is high, and the work efficiency is not high at the same time.

The Chinese patent application number is CN201620839956.5, which discloses a convenient Dacromet coating and centrifuge integrated machine. The lower end of the dipping box is provided with a middle box, a bottom plate is provided between the dipping box and the middle box, and the lower end of the middle box is provided with a There is a partition between the liquid tank, the middle tank and the liquid tank, a fixed seat is provided in the middle of the top of the partition, a centrifugal motor is provided at the upper end of the fixed seat, a fixed frame is provided on the side wall of the centrifugal motor, and the transmission shaft at the upper end of the centrifugal motor Go up through the bottom plate into the dipping box, the upper end of the transmission shaft is connected to the center of the bottom of the centrifugal basket, the top of the dipping box is provided with a cover plate, and there is a drain pipe between the bottom of the dipping box and the liquid tank, and the top of the drain pipe There is a valve, and a pump body is installed in the middle box. One end of the pump body is connected to a suction pipe, and the suction pipe extends into the bottom of the liquid storage tank. The other end of the pump body is connected to a liquid inlet pipe, and the upper end of the liquid inlet pipe is connected to the side wall of the dipping tank. , the liquid inlet pipe is provided with a valve, and the inner wall of the dip coating tank is provided with a first stirring device. The coating solution of this device needs to be repeatedly transferred between the dip coating tank and the liquid storage tank, which wastes more time and lower work efficiency.

Contents of the invention

The purpose of this utility model is to provide a dip-coating centrifugal device with a feeding device to solve all or one of the above-mentioned defects caused by the prior art.

A dip-coating centrifuge equipment with a feeding device, comprising a first frame body, a second frame body, a liquid storage box, a material storage box, a centrifugal mechanism and a lifting mechanism, the material storage box is in a mesh structure, the storage box The liquid box is connected to the lifting mechanism, the material storage box is connected to the centrifugal mechanism, the liquid storage box is arranged inside the first frame, the material storage box is arranged inside the liquid storage box, and the centrifugal mechanism Arranged inside the second frame body, the first frame body is welded on the top of the second frame body, and a feeding mechanism is also provided on the side of the first frame body.

Preferably, the centrifugal mechanism includes a motor, a first screw, a first handle, a first nut, a support rod, a support shaft, a first slider, a first slide rail, a second slider, a second slide rail, and a driving member , the first bevel gear, the gear, the second screw, the second handle, the second nut, the third slider, the third slide rail, the second bevel gear, the third bevel gear, the fourth bevel gear, the rotating column and the top sleeve , the fourth bevel gear and the gear are installed on the rotating column, the second bevel gear is installed on the rotating shaft of the motor, one end of the first screw is rotatably connected with the support rod, and the other end is welded together with the first handle , the first screw is screwed to the second frame, the first bevel gear is rotatably connected to the support shaft, the support shaft and the support rod are fixedly connected to the top of the first slider, and the first slider is connected to the The first sliding rail is slidably connected, the second sliding block is slidably connected to the second sliding rail, the second sliding rail is fixedly connected to the top of the support rod, the second sliding block is provided with a slide groove, and the driving The upper end of the piece is slidably connected with the chute, the lower end is fixedly connected with the first bevel gear, the right end surface of the second slider is provided with protruding teeth, the third slider is slidably connected with the third slide rail, and the third The bevel gear is rotatably connected to the third slider, one end of the second screw is rotatably connected to the third slider, and the other end is welded to the second handle, the second screw is screwed to the second frame, and the The top sleeve is welded on the top of the rotating column, and the top of the top sleeve is also fixedly connected with a rectangular protrusion, and the rotating column is rotatably connected with the bottom of the first frame.

Preferably, the lifting mechanism includes a first lifting mechanism and a second lifting mechanism, the first lifting mechanism and the second lifting mechanism are arranged symmetrically, and the first lifting mechanism includes a cylinder, a connecting plate, a third screw and fastening nuts, the cylinder is installed on the bottom of the first frame, one end of the connecting plate is welded on the outer surface of the liquid storage box, the third screw is welded on the telescopic shaft of the cylinder, the third screw Pass through the connecting plate and be detachably connected with the connecting plate through fastening nuts.

Preferably, the liquid storage box is cylindrical and the center of the liquid storage box is provided with a central post, and the central post can be sleeved on the rotating post while the diameter of the central post is smaller than the diameter of the top sleeve.

Preferably, the cross-section of the material storage box is in the shape of an inverted "concave", and the center of the material storage box is provided with a through groove corresponding to the rectangular protrusion, through the cooperation of the rectangular protrusion and the through groove, the storage box The feed box is sleeved on the top sleeve.

Preferably, the rectangular protrusion is further provided with a threaded hole, the threaded hole is threaded with a fourth screw, the top of the fourth screw is welded with a handle, and the middle of the fourth screw is welded with a stopper.

Preferably, the feeding mechanism 8 includes two symmetrically arranged first support beams, a straight shaft, a second motor, a reducer, a third support plate, two symmetrically arranged second support beams, driving rollers, driven Rollers, conveyor belts and a third motor, one end of the first support beam is welded to the side of the first frame, the direct shaft is rotatably connected between the two first support beams, and one end of the direct shaft passes through the first A support beam is connected with the reducer, one end of the reducer is connected with the rotating shaft of the second motor, the reducer and the second motor are installed on the third support plate, and the bottoms of the two second support beams are connected with the The straight shafts are welded together, the driving roller and the driven roller are connected in rotation on both sides of the two second support beams, the driving roller is connected with the rotating shaft of the third motor, and the third motor is installed on the The side of the two supporting beams, the conveyor belt is wrapped between the driving roller and the driven roller, the inside of the first frame is also obliquely fixedly connected with a material guide plate, and the two ends of the two second supporting beams are respectively A baffle plate and a limiting plate are fixedly connected, and a stopper is welded on the outer surface of the first frame, and the position of the stopper corresponds to the position of the limiting plate.

Preferably, a cover mechanism is also connected to the top of the first frame.

Preferably, the cover mechanism includes a cover, a guide rod and a brace, the bottom of the cover is provided with a chute, the guide rod is welded to the first frame, and the top of the guide rod is connected to the first frame. The top of the frame is flush, and the cover is slidingly connected to the top edge of the first frame and the guide rod through a chute, and one end of the brace is welded to the bottom of the guide rod, and the other end is welded to the first frame s surface.

The beneficial effects of the utility model are: the utility model can separate the dacromet coating solution from the workpiece after the dip coating of the workpiece is completed through the design of the lifting mechanism and the centrifugal mechanism, and perform centrifugal treatment on the workpiece through the centrifugal mechanism. The utility model is simple in structure, easy to use, saves the workpiece transfer step, improves the work efficiency, and at the same time, the rotating column can rotate back and forth, which improves the dipping effect of the workpiece.

The workpiece is transported to the storage frame through the feeding mechanism, which reduces the labor intensity of employees and further improves work efficiency.

Description of drawings

Fig. 1 is a structural schematic diagram 1 of a specific embodiment of the present invention.

Fig. 2 is a structural schematic diagram II of a specific embodiment of the present invention.

Among them, the first frame body 1, the second frame body 2, the liquid storage box 3, the material storage box 4, the centrifugal mechanism 5, the lifting mechanism 6, the cover body mechanism 7, the feeding mechanism 8, the motor 51, the first screw rod 52, First handle 53, first nut 54, support rod 55, support shaft 56, first slide block 57, first slide rail 58, second slide block 59, second slide rail 510, driver 511, first bevel gear 512, gear 513, second screw rod 514, second handle 515, second nut 516, third slider 517, third slide rail 518, second bevel gear 519, third bevel gear 520, fourth bevel gear 521, Rotation column 522, top sleeve 523, rectangular protrusion 524, fourth screw rod 526, handle 527, limit block 528, first lifting mechanism 61, second lifting mechanism 62, cylinder 63, connecting plate 64, third screw rod 65, Clamping nut 66, central column 31, through groove 41, cover body 71, guide rod 72, diagonal brace 73, first support beam 81, straight shaft 82, second motor 83, reducer 84, third support plate 85 , the second support beam 86, the driving roller 87, the driven roller 88, the conveyor belt 89, the third motor 810, the material guide plate 811, the material blocking plate 812, the limiting plate 813, the stopper 814.

Detailed ways

Through the description of the embodiments below, the specific implementation of the utility model is as follows: the shape, structure, mutual position and connection relationship between the various parts, the function and working principle of each part, the manufacturing process and the operation and use of the various components involved. Methods, etc., are described in further detail to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present utility model.

As shown in Figure 1-2, a dip-coating centrifugal equipment with a feeding device includes a first frame body 1, a second frame body 2, a liquid storage box 3, a material storage box 4, a centrifugal mechanism 5 and a lifting mechanism 6 , the storage box 4 is in a mesh structure, the storage box 3 is connected to the lifting mechanism 6, the storage box 4 is connected to the centrifugal mechanism 5, and the storage box 3 is arranged in the first frame 1, the storage box 4 is arranged inside the liquid storage box 3, the centrifugal mechanism 5 is arranged inside the second frame body 2, and the first frame body 1 is welded on the top of the second frame body 2 , The side of the first frame body 1 is also provided with a feeding mechanism 8 .

In this embodiment, the centrifugal mechanism 5 includes a motor 51, a first screw rod 52, a first handle 53, a first nut 54, a support rod 55, a support shaft 56, a first slider 57, a first slide rail 58, Second slide block 59, second slide rail 510, driver 511, first bevel gear 512, gear 513, second screw rod 514, second handle 515, second nut 516, third slide block 517, third slide rail 518, the second bevel gear 519, the third bevel gear 520, the fourth bevel gear 521, the rotating column 522 and the top sleeve 523, the fourth bevel gear 521 and the gear 513 are installed on the rotating column 522, the second bevel gear The gear 519 is installed on the rotating shaft of the motor 51. One end of the first screw 52 is connected to the support rod 55 in rotation, and the other end is welded to the first handle 53. The first screw 52 is screwed to the second frame body 2 , the first bevel gear 512 is rotatably connected to the support shaft 56, the support shaft 56 and the support rod 55 are fixedly connected to the top of the first slider 57, and the first slider 57 is slidably connected to the first slide rail 58 , the second slide block 59 is slidably connected with the second slide rail 510, and the second slide rail 510 is fixedly connected to the top of the support rod 55, and the second slide block 59 is provided with a chute, and the drive member The upper end of 511 is slidably connected with the chute, and the lower end is fixedly connected with the first bevel gear 512. The right end surface of the second slider 59 is provided with protruding teeth, and the third slider 517 is slidably connected with the third slide rail 518. The third bevel gear 520 is rotatably connected to the third slider 517, one end of the second screw 514 is rotatably connected to the third slider 517, and the other end is welded to the second handle 515. The second screw 514 Screwed with the second frame body 2, the top sleeve 523 is welded on the top of the rotating column 522, and the top of the top sleeve 523 is also fixedly connected with a rectangular protrusion 524, and the rotating column 522 is connected to the top of the first frame body 1. Bottom swivel connection.

In this embodiment, the lifting mechanism 6 includes a first lifting mechanism 61 and a second lifting mechanism 62, the first lifting mechanism 61 and the second lifting mechanism 62 have the same structure and are arranged symmetrically, and the first lifting mechanism 61 Including a cylinder 63, a connecting plate 64, a third screw rod 65 and a fastening nut 66, the cylinder 63 is installed on the bottom of the first frame body 1, and one end of the connecting plate 64 is welded on the outer surface of the liquid storage box 3, so The third screw rod 65 is welded on the telescopic shaft of the cylinder 63 , the third screw rod 65 passes through the connecting plate 64 , and is detachably connected to the connecting plate 64 through a fastening nut 66 .

In this embodiment, the liquid storage box 3 is cylindrical and the center of the liquid storage box 3 is provided with a central post 31, which can be sleeved on the rotating post 522 while the diameter of the central post 31 Smaller than the diameter of the top sleeve 523.

In this embodiment, the cross-section of the material storage box 4 is in an inverted "concave" shape, and the center of the material storage box 4 is provided with a through groove 41 corresponding to the rectangular protrusion 524, through which the rectangular protrusion 524 Cooperating with the through groove 41 , the material storage box 4 is sleeved on the top sleeve 523 .

In this embodiment, the rectangular protrusion 524 is also provided with a threaded hole, the threaded hole is threaded with a fourth screw 526, the top of the fourth screw 526 is welded with a handle 527, the fourth screw 526 The middle part of the welding limit block 528.

In this embodiment, the feeding mechanism 8 includes two symmetrically arranged first support beams 81, a straight shaft 82, a second motor 83, a reducer 84, a third support plate 85, two symmetrically arranged second Support beam 86, driving roller 87, driven roller 88, conveyor belt 89 and third motor 810, one end of the first support beam 81 is welded on the side of the first frame body 1, and the straight shaft 82 is rotatably connected to two Between the first support beams 81, one end of the straight shaft 82 passes through the first support beam 81 and is connected to a speed reducer 84, and one end of the speed reducer 84 is connected to the rotating shaft of the second motor 83, and the speed reducer 84 and the second motor 83 are installed on the third support plate 85, the bottoms of the two second support beams 86 are welded together with the straight shaft 82, and the driving roller 87 and the driven roller 88 are rotatably connected to the two second Both sides of the support beam 86, the driving roller 87 is connected with the rotating shaft of the third motor 810, the third motor 810 is installed on the side of the second support beam 86, and the conveyor belt 89 is wrapped around the driving roller 87 and Between the driven rollers 88, the inside of the first frame body 1 is obliquely and fixedly connected with a material guide plate 811, and the two ends of the two second support beams 86 are also fixedly connected with a material stopper 812 and a stopper plate 812 respectively. plate 813 , the outer surface of the first frame body 1 is also welded with a stopper 814 , the position of the stopper 814 corresponds to the position of the limiting plate 813 .

In this embodiment, a cover mechanism 7 is also connected to the top of the first frame body 1 .

In this embodiment, the cover body mechanism 7 includes a cover body 71 , a guide rod 72 and a brace 73 , the bottom of the cover body 71 is provided with a slide groove, and the guide rod 72 is welded on the first frame body 1 , the top of the guide rod 72 is flush with the top of the first frame body 1, the cover body 71 is slidably connected with the top edge of the first frame body 1 and the guide rod 72 through a chute, and the diagonal brace 73 One end is welded to the bottom of the guide rod 72 , and the other end is welded to the surface of the first frame body 1 .

The working principle of the present utility model: add the Dacromet coating liquid into the liquid storage box 3, store the workpiece to be processed on the conveyor belt 89, then start the second motor 83 to make the conveyor belt 89 rotate, when the conveyor belt 89 rotates to close to the first When one end of a frame body 1 is higher than the top of the first frame body 1, the second motor 83 is controlled to stop, and then the third motor 810 is started, and the third motor 810 drives the conveyor belt 89 to rotate, and the workpiece on the conveyor belt 89 passes through the material guide plate 811 In the storage box 4, start the cylinder 63 at this time, so that the cylinder 63 drives the liquid storage box 3 to move upwards, so that the coating liquid in the liquid storage box 3 will immerse the workpiece. At this time, by turning the first handle 53, the first The bevel gear 512 meshes with the second bevel gear 519, and rotates the second handle 515 at the same time, so that the third bevel gear 520 is separated from the second bevel gear 519, and the motor 51 is turned on, and the work of the motor 51 drives the second bevel gear 519 to rotate, and the second bevel gear 519 is rotated. The bevel gear 519 drives the first bevel gear 512 to rotate, so that the driving member 511 rotates with the first bevel gear 512, and the driving member 511 moves in the chute to drive the second slider 59 to move back and forth, so that the gear 513 rotates back and forth to drive the rotating column 522 rotates back and forth, and the rotating column 522 drives the material storage box 4 to rotate back and forth, thereby improving the dip coating effect of the workpiece. After the dip coating is completed, the control cylinder 63 returns to the original position, so that the coating liquid is separated from the workpiece, and the motor is turned off. Rotate the first handle 53 and the second handle 515 so that the first bevel gear 512 is separated from the second bevel gear 519, the third bevel gear 520 is meshed with the second bevel gear 519 and the fourth bevel gear 521, the motor 51 is started, and the The relationship drives the rotating column 522 to rotate in one direction to perform centrifugal motion.

The utility model has been exemplarily described above in conjunction with the embodiments. Obviously, the specific implementation of the utility model is not limited by the above methods, as long as various insubstantial improvements are made by adopting the method concept and technical solutions of the utility model, or Directly applying the ideas and technical solutions of the utility model to other occasions without improvement is within the protection scope of the utility model. The protection scope of the present utility model should be determined by the protection scope defined in the claims.

Claims (8)

1. a kind of dip-coating centrifugation apparatus with feeding device, which is characterized in that including the first framework (1), second framework (2), Liquid storage box (3), material-storing box (4), centrifugal mechanism (5) and elevating mechanism (6), the material-storing box (4) reticulate structure, the liquid storage Box (3) is connected with elevating mechanism (6), and the material-storing box (4) is connected with centrifugal mechanism (5), and the liquid storage box (3) is arranged in The inside of first framework (1), the material-storing box (4) are arranged in the inside of liquid storage box (3), and the centrifugal mechanism (5) is arranged in The inside of two frameworks (2), first framework (1) are welded on the top of second framework (2), the side of first framework (1) It is additionally provided with feed mechanism (8)；

The feed mechanism (8) includes two the first supporting beams (81) being arranged symmetrically, d-axis (82), the second motor (83), subtracts Fast machine (84), third support plate (85), two be arranged symmetrically the second supporting beam (86), driving roller (87), driven roller (88), one end of conveyer belt (89) and third motor (810), first supporting beam (81) is welded on the side of the first framework (1) Face, the d-axis (82) are rotatably connected between two first supporting beams (81), and one end of the d-axis (82) passes through first Support beam (81) is connect with speed reducer (84), one end of the speed reducer (84) and the rotation axis connection of the second motor (83), described Speed reducer (84) and the second motor (83) are mounted on third support plate (85), the bottom of two second supporting beams (86) with D-axis (82) welds together, and the driving roller (87) and driven roller (88) are rotatably connected on two second supporting beams (86) Two sides, the driving roller (87) and the rotation axis of third motor (810) link together, third motor (810) peace Mounted in the side of the second supporting beam (86), the conveyer belt (89) is wrapped between driving roller (87) and driven roller (88), The inside of first framework (1), which also tilts, to be fixedly connected with stock guide (811), the both ends of two second supporting beams (86) It is also respectively fixedly connected with striker plate (812) and limit plate (813), the outer surface of first framework (1) is also welded with block (814), the position of the block (814) is corresponding with the position of limit plate (813).

2. a kind of dip-coating centrifugation apparatus with feeding device according to claim 1, it is characterised in that: the centrifuge Structure (5) includes motor (51), the first screw rod (52), first handle (53), the first nut (54), support rod (55), support shaft (56), the first sliding block (57), the first sliding rail (58), the second sliding block (59), the second sliding rail (510), actuator (511), the first cone Gear (512), gear (513), the second screw rod (514), second handle (515), the second nut (516), third sliding block (517), Third sliding rail (518), second bevel gear (519), third hand tap gear (520), the 4th bevel gear (521), Rotational Cylindrical (522) and top It covers (523), the 4th bevel gear (521) and gear (513) are mounted on Rotational Cylindrical (522), the second bevel gear (519) It is mounted in the rotation axis of motor (51), described first screw rod (52) one end and support rod (55) are rotatablely connected, the other end and the One handle (53) welds together, and first screw rod (52) is threadedly coupled with second framework (2), the first bevel gear (512) it is rotatablely connected with support shaft (56), the support shaft (56) and support rod (55) are fixedly connected on the first sliding block (57) Top, first sliding block (57) are slidably connected with the first sliding rail (58), and second sliding block (59) and the second sliding rail (510) are sliding Dynamic connection, second sliding rail (510) are fixedly connected on the top of support rod (55), and second sliding block (59), which is equipped with, to be slided The upper end of slot, the actuator (511) is slidably connected with sliding slot, and lower end is fixedly connected with first bevel gear (512), and described second The right side of sliding block (59) is equipped with double wedge, and the third sliding block (517) is slidably connected with third sliding rail (518), the third cone Gear (520) is rotatably connected on third sliding block (517), and described second screw rod (514) one end and third sliding block (517) rotation connect It connects, the other end welds together with second handle (515), and second screw rod (514) is threadedly coupled with second framework (2), institute The top that top cover (523) is welded on Rotational Cylindrical (522) is stated, the top of the top cover (523) is also fixedly connected with rectangular preiection (524), the Rotational Cylindrical (522) connect with the lower rotation of the first framework (1).

3. a kind of dip-coating centrifugation apparatus with feeding device according to claim 2, it is characterised in that: the elevator Structure (6) includes the first elevating mechanism (61) and the second elevating mechanism (62), first elevating mechanism (61) and the second elevator Structure (62) structure is identical and is arranged symmetrically, and first elevating mechanism (61) includes cylinder (63), connecting plate (64), third screw rod (65) and fastening nut (66), the cylinder (63) are mounted on the bottom of the first framework (1), one end weldering of the connecting plate (64) The outer surface in liquid storage box (3) is connect, the third screw rod (65) is welded on the telescopic shaft of cylinder (63), the third screw rod (65) connecting plate (64) are passed through, and is detachably connected by fastening nut (66) with connecting plate (64).

4. a kind of dip-coating centrifugation apparatus with feeding device according to claim 3, it is characterised in that: the liquid storage box (3) at middle through post (31) are equipped at cylindrical and liquid storage box (3) center, the middle through post (31) can cover in Rotational Cylindrical (522) The diameter of upper while middle through post (31) is less than the diameter of top cover (523).

5. a kind of dip-coating centrifugation apparatus with feeding device according to claim 4, it is characterised in that: the material-storing box (4) cross section is equipped with through slot corresponding with rectangular preiection (524) at concave at the center of the material-storing box (4) (41), material-storing box (4) is socketed on top cover (523) with matching for through slot (41) by rectangular preiection (524).

6. a kind of dip-coating centrifugation apparatus with feeding device according to claim 2, it is characterised in that: the rectangle is convex It rises and is additionally provided with threaded hole on (524), the threaded hole is threaded with the 4th screw rod (526), the top of the 4th screw rod (526) Portion is welded with handle (527), is welded with limited block (528) in the middle part of the 4th screw rod (526).

7. a kind of dip-coating centrifugation apparatus with feeding device according to claim 1, it is characterised in that: first frame Lid mechanism (7) are also connected at the top of body (1).

8. a kind of dip-coating centrifugation apparatus with feeding device according to claim 7, it is characterised in that: the lid machine Structure (7) includes lid (71), guide rod (72) and diagonal brace (73), and the bottom of the lid (71) is equipped with sliding slot, the guide rod (72) it is welded on the first framework (1), is flush at the top of the top and the first framework (1) of the guide rod (72), the lid Body (71) is slidably connected at the top edge of the first framework (1) with guide rod (72) by sliding slot, described diagonal brace (73) one end It is welded on the bottom of guide rod (72), the other end is welded on the surface of the first framework (1).