Waste gas suction hood for collecting waste gas

Abstract

The invention relates to the technical field of waste gas treatment, and discloses a waste gas suction hood for waste gas collection, the device comprises a mounting plate and a telescopic hose mounted on one side of the mounting plate, the end, away from the mounting plate, of the telescopic hose is connected with a hood body, and the outer side of the telescopic hose is fixedly connected with a fixing sleeve; the mounting plate is arranged in the cover body, and an adjusting assembly is arranged on the lower portion of the side, close to the telescopic hose, of the mounting plate; the sealing assembly comprises a rotating part, a pressing part and an adjusting part, the rotating part comprises vertical rods symmetrically and fixedly mounted on one side in the cover body, a mounting box is fixedly connected between the two vertical rods, and a motor is fixedly mounted in the mounting box. The gas collecting hood and equipment are not tightly sealed, so that a small amount of polluted waste gas escapes out of the gas collecting hood, and the sealing performance and the collecting effect of waste gas collection are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and specifically to an exhaust air suction hood for waste gas collection. Background Art

[0002] Waste gas treatment equipment is an environmental protection equipment that recovers or removes and reduces the harmful components of exhaust gas emissions to protect the environment and purify the air. In order to improve the intake efficiency, an exhaust air suction hood is usually provided at the intake port of the waste gas treatment equipment.

[0003] For example, the exhaust air suction hood of a waste gas treatment device disclosed in the publication number CN213436222U includes a bracket. A suction box with a frame structure is provided on the desktop of the bracket. The left end face of the suction box is snap-connected to the bracket, and the other three end faces of the suction box are fixedly connected to the bracket. A rubber pad is fixedly provided at the bottom end face of the suction box on the left end face. A slide plate is slidably connected above the left end face of the suction box, and the suction box penetrates through the slide plate. A first anti-leakage pad is fixedly provided above the inner side wall of the suction box; the staff places the pollution source in the one-way valve. At this time, the fan is powered on, so that the waste gas is sucked away by the fan and enters the next process through the discharge pipe. If the staff needs to repair the suction hood, they only need to move the position of the bracket so that the electric push rod pulls the suction box up, and the opening of this closed device is realized, which is convenient for the staff to repair. However, there are differences in the waste gas outlet sizes of different devices, making the method of directly connecting the pipeline to the waste gas outlet of the device less applicable and not suitable for the waste gas collection of different devices. Moreover, when the working device shakes or vibrates, it may cause the air collection hood to be not tightly sealed with the device, resulting in a small amount of polluted waste gas escaping outside the air collection hood, thereby causing harm to the surrounding environment and operators, reducing the sealing performance and collection effect of waste gas collection. Also, due to the different angles of waste gas discharge from the working device, the air collection hood at a fixed position is not convenient to fit tightly with the working device, which will also affect the sealing effect of the air collection hood.

[0004] Therefore, an exhaust air suction hood for waste gas collection is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an exhaust air suction hood for waste gas collection to solve the problem that when the working device shakes or vibrates, it may cause the air collection hood to be not tightly sealed with the device, resulting in a small amount of polluted waste gas escaping outside the air collection hood, reducing the sealing performance and collection effect of waste gas collection.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An exhaust air suction hood for waste gas collection includes a mounting plate and a telescopic hose installed on one side of the mounting plate. The end of the telescopic hose away from the mounting plate is connected to a hood body, and a fixed sleeve is fixedly connected to the outside of the telescopic hose; It further includes: A sealing assembly is arranged inside the cover body, and an adjusting assembly is arranged at the lower part on the side of the mounting plate close to the telescopic hose. The sealing assembly includes a rotating part, a pressing part and an adjusting part. The rotating part includes vertical rods symmetrically and fixedly installed on one side inside the cover body. An installation box is fixedly connected between the two vertical rods. A motor is fixedly installed inside the installation box. The output end of the motor passes through the vertical rod and is fixedly connected with a rotating shaft. One end of the rotating shaft away from the motor is fixedly connected with a rotating part and a fan part. The pressing part includes an outer ring body one, a support rod and an inner ring installed outside the fan part. An outer ring body two is slidably installed on the side of the outer ring body one away from the telescopic hose. A slide rod is connected between the outer ring body one and the outer ring body two. One side of the outer ring body two is connected with a pressing ring.

[0007] Preferably, the adjusting part includes a sphere fixedly connected to one side of the vertical rod. The rotating shaft is rotatably connected with the sphere. One side of the sphere away from the vertical rod is fixedly connected with a fixing strip. One side of the fixing strip away from the sphere is fixedly connected with a cylinder. The rotating part is rotatably installed with the fixing strip. The fan part is located on the side of the rotating part away from the rotating shaft. The support rods are symmetrically and fixedly connected to the outside of the rotating part.

[0008] By adopting the above technical scheme, the motor drives the rotating shaft and the rotating part to rotate. The rotating part drives the fan part and the support rods to rotate. The fan part rotates to draw air, which is convenient for drawing waste gas into the cover body and the telescopic hose. The pressing ring presses tightly on the outside of the working equipment, reducing the leakage of waste gas.

[0009] Preferably, the inner ring is in fit with the inner wall of the cylinder. A rotating sleeve is sleeved on the outside of the sphere. The rotating sleeve is rotatably connected with the sphere. Diagonal rods are symmetrically and fixedly connected to the outside of the rotating sleeve. One end of the diagonal rod away from the rotating sleeve is fixedly connected with the outer ring body one. A first spring is fixedly installed between the outer ring body one and the inner wall of the cover body. A second spring is fixedly installed between the inner wall of the outer ring body one and the outer wall of the cylinder.

[0010] By adopting the above technical scheme, the push bar simultaneously presses the connecting plate. The connecting plate drives the slide rod and the outer ring body two to slide. The slide rod will further stretch the third spring.

[0011] Preferably, the slide rod is fixedly connected with the outer ring body two. The number of the slide rods is not less than three. The slide rods are slidably connected with the outer ring body one. A third spring is sleeved on the outside of the slide rod. Two ends of the third spring are respectively fixedly connected with the outer ring body one and the outer ring body two. A connecting plate is fixedly connected to the middle of the outside of the slide rod.

[0012] By adopting the above technical scheme, when the outer ring body two drives the inner rod and the pressing ring to move, the pressing ring will press tightly on the outside of the working equipment.

[0013] Preferably, fixing plates are symmetrically and fixedly connected to the outer side of the outer ring body II. Inner rods are slidably connected to the inside of the fixing plates. The inner rods are fixedly connected to the pressing ring. A fourth spring is sleeved on the outer side of the inner rods. Two ends of the fourth spring are respectively fixedly connected to the fixing plate and the pressing ring. The number of the inner rods is not less than three.

[0014] By adopting the above technical solution, the elastic force of the fourth spring assists in pressing the pressing ring, so that when the connection between the working device and the cover body becomes loose, the pressing ring can still be tightly pressed against the outside of the exhaust port.

[0015] Preferably, a first chute and a second chute are symmetrically formed in the outer side of the cylinder. The first chute communicates with the second chute. A cross bar is fixedly connected to the inside of the first chute. A pushing bar is slidably connected to the outer side of the cross bar. The pushing bar is slidably connected to the first chute. An inclined block is fixedly connected to one side of the pushing bar. The inclined block is slidably connected to the second chute. The pushing bar abuts against the connecting plate.

[0016] By adopting the above technical solution, when the inclined block is squeezed by the moving rod, the inclined block will drive the pushing bar to slide on the outer side of the cross bar. The pushing bar simultaneously squeezes the connecting plate, and the connecting plate drives the sliding rod and the outer ring body II to slide.

[0017] Preferably, vertical grooves are symmetrically formed in the outer side of the inner ring. The number of the vertical grooves is the same as that of the sliding rods. A fifth spring is fixedly installed in the inside of the vertical groove. One end of the fifth spring is fixedly connected to a moving rod. The same hard rubber strip is fixedly connected to the outer side of the moving rod. The hard rubber strip passes through the second chute and abuts against the inclined surface of the inclined block.

[0018] By adopting the above technical solution, the moving rod stretches the fifth spring and squeezes the hard rubber strip. The hard rubber strip is arranged in a circle, which is convenient for the hard rubber strip to squeeze the inclined surfaces of a plurality of inclined blocks.

[0019] Preferably, the adjusting assembly includes a cross plate rotatably installed on one side of the mounting plate. A vertical shaft is rotatably installed on the side of the cross plate far away from the mounting plate. The top end of the vertical shaft is fixedly connected to the fixed sleeve. A collar is fixedly connected to one side of the bottom of the cross plate. The vertical shaft is rotatably connected to the collar.

[0020] By adopting the above technical solution, pull out the bolt, rotate the vertical shaft, and the vertical shaft drives the fixed sleeve and the telescopic hose to rotate, which is convenient for horizontally adjusting the angle. After adjustment, insert the bolt into the jack at the corresponding position to facilitate fixing the vertical shaft again.

[0021] Preferably, a bolt is slidably installed on the outer side of the collar. Jacks are symmetrically formed in the outer side of the vertical shaft. The bolt is snap-fitted with the jack. A bottom plate is also fixedly connected to one side of the mounting plate. The bottom plate is located below the cross plate. An electric push rod is fixedly installed on the top side of the bottom plate. The telescopic end of the electric push rod is fixedly connected to a top plate. The top plate abuts against the cross plate.

[0022] By adopting the above technical solution, the electric push rod is started, and the electric push rod drives the top plate to expand and contract. The top plate assists in the lifting and adjustment of the cross plate, so as to facilitate the vertical angle adjustment of the fixed sleeve and the telescopic hose.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. A sealing component is provided. The operator covers the cover body outside the exhaust gas outlet of the working equipment, so that the cover body is closely attached to the outside of the working equipment. Then, the motor is started to work. The motor drives the rotating shaft and the rotating part to rotate. The rotating part drives the fan part and the support rod to rotate. The fan part rotates to pump air, facilitating the pumping of exhaust gas into the cover body and the telescopic hose. The support rod drives the inner ring to rotate. The moving rod inside the inner ring will slide outwards towards the outside of the vertical groove under the action of centrifugal force. The moving rod stretches the fifth spring and presses the hard rubber strip. The hard rubber strip is arranged in a circle, facilitating the hard rubber strip to press the inclined surfaces of multiple inclined blocks. The inclined blocks drive the push bar to slide outside the cross bar. The push bar simultaneously presses the connecting plate. The connecting plate drives the sliding rod and the second outer ring body to slide. The sliding rod stretches the third spring. The second outer ring body drives the inner rod and the pressing ring to move, so that the pressing ring presses tightly on the outside of the working equipment. The elastic force of the fourth spring assists in tightly pressing the pressing ring, so that when the connection between the working equipment and the cover body becomes loose, the pressing ring can still press tightly on the outside of the exhaust gas outlet, thereby reducing the leakage of exhaust gas. And when the cover body is angularly deflected, the cover body and the cylinder are angularly deflected. At this time, the cover body presses the first spring, and the cylinder stretches the second spring. The rotating sleeve can rotate outside the sphere to adapt to the angular change of the cover body and the cylinder, so as to reduce the position offset of the first outer ring body, thereby maintaining a good pressing property of the pressing ring. Combined with the air extraction of the fan part, the exhaust gas collection effect is improved, solving the problem that when the working equipment shakes or vibrates, the airtightness between the air collection cover and the equipment may become loose, resulting in a small amount of polluted exhaust gas escaping outside the air collection cover, reducing the airtightness and collection effect of the exhaust gas collection. 2. An adjustment component is provided. When it is necessary to adjust the installation angle of the cover body, by pulling out the pin and rotating the vertical shaft, the vertical shaft drives the fixed sleeve and the telescopic hose to rotate, facilitating the horizontal angle adjustment. After adjustment, the pin is inserted into the jack at the corresponding position to facilitate the re-fixing of the vertical shaft. By starting the electric push rod, the electric push rod drives the top plate to expand and contract. The top plate assists in the lifting and adjustment of the cross plate, so as to facilitate the vertical angle adjustment of the fixed sleeve and the telescopic hose, improving the flexibility and airtightness of the subsequent installation of the cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the first three-dimensional overall structure of the present invention; Figure 2 It is a schematic diagram of the second three-dimensional overall structure of the present invention; Figure 3 It is a schematic diagram of the installation structure of the fixed sleeve of the present invention; Figure 4 It is a schematic diagram of the sectional structure of the cover body of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure at location A in the present invention; Figure 6 For the present invention Figure 4 Schematic diagram of the enlarged structure at location B in the present invention; Figure 7 Schematic diagram of the installation structure of the vertical rod of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at location C in the present invention; Figure 9 Schematic diagram of the installation structure of the cylinder of the present invention; Figure 10 Schematic diagram of the sectional view of the cylinder of the present invention; Figure 11 For the present invention Figure 10 Schematic diagram of the enlarged structure at location D in the present invention; Figure 12 Schematic diagram of the installation structure of the pressure ring of the present invention; Figure 13 Schematic diagram of the installation structure of the mounting plate of the present invention; Figure 14 For the present invention Figure 13 Schematic diagram of the enlarged structure at location E in the present invention.

[0025] In the figure: 1. Mounting plate; 2. Telescopic hose; 3. Cover body; 4. Fixed sleeve; 5. Sealing assembly; 51. Vertical rod; 52. Installation box; 53. Motor; 54. Rotating shaft; 55. Sphere; 56. Fixed strip; 57. Cylinder; 58. Rotating member; 59. Fan blade part; 510. Support rod; 511. Inner ring; 512. Rotating sleeve; 513. Inclined rod; 514. Outer ring body one; 515. Spring one; 516. Spring two; 517. Outer ring body two; 518. Slide rod; 519. Spring three; 520. Connecting plate; 521. Fixed plate; 522. Inner rod; 523. Spring four; 524. Pressure ring; 525. First chute; 526. Cross bar; 527. Pushing bar; 528. Second chute; 529. Inclined block; 530. Vertical groove; 531. Spring five; 532. Moving rod; 533. Hard rubber strip; 6. Adjusting assembly; 61. Cross plate; 62. Vertical shaft; 63. Sleeve; 64. Plug; 65. Jack; 66. Base plate; 67. Electric push rod. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1 - 3 , the present invention provides a technical solution: an exhaust air suction hood for exhaust gas collection, including a mounting plate 1 and a telescopic hose 2 installed on one side of the mounting plate 1. One end of the telescopic hose 2 away from the mounting plate 1 is connected to a hood body 3, and a fixed sleeve 4 is fixedly connected to the outer side of the telescopic hose 2.

[0028] A sealing assembly 5 is arranged inside the hood body 3. The sealing assembly 5 includes a rotating part, a pressing part, and an adjusting part. The rotating part includes vertical rods 51 symmetrically and fixedly installed on one side inside the hood body 3. An installation box 52 is fixedly connected between the two vertical rods 51. A motor 53 is fixedly installed inside the installation box 52. The output end of the motor 53 passes through the vertical rod 51 and is fixedly connected to a rotating shaft 54. One end of the rotating shaft 54 away from the motor 53 is fixedly connected to a rotating member 58 and a fan blade part 59.

[0029] The pressing part includes an outer ring body one 514, support rods 510 and an inner ring 511 installed on the outer side of the fan blade part 59. On the side of the outer ring body one 514 away from the telescopic hose 2, an outer ring body two 517 is slidably installed. A slide rod 518 is connected between the outer ring body one 514 and the outer ring body two 517. One side of the outer ring body two 517 is connected to a pressing ring 524.

[0030] The adjusting part includes a sphere 55 fixedly connected to one side of the vertical rod 51. The rotating shaft 54 is rotatably connected to the sphere 55. One side of the sphere 55 away from the vertical rod 51 is fixedly connected to a fixed strip 56. One side of the fixed strip 56 away from the sphere 55 is fixedly connected to a cylinder 57. The rotating member 58 is rotatably installed with the fixed strip 56. The fan blade part 59 is located on the side of the rotating member 58 away from the rotating shaft 54. The support rods 510 are symmetrically and fixedly connected to the outer side of the rotating member 58.

[0031] The inner ring 511 is in fit with the inner wall of the cylinder 57. A rotating sleeve 512 is sleeved on the outer side of the sphere 55. The rotating sleeve 512 is rotatably connected to the sphere 55. Diagonal rods 513 are symmetrically and fixedly connected to the outer side of the rotating sleeve 512. One end of the diagonal rod 513 away from the rotating sleeve 512 is fixedly connected to the outer ring body one 514. A first spring 515 is fixedly installed between the outer ring body one 514 and the inner wall of the hood body 3. A second spring 516 is fixedly installed between the inner wall of the outer ring body one 514 and the outer wall of the cylinder 57.

[0032] The slide rod 518 is fixedly connected to the outer ring body two 517. There are no less than three slide rods 518. The slide rod 518 is slidably connected to the outer ring body one 514. A third spring 519 is sleeved on the outer side of the slide rod 518. Two ends of the third spring 519 are respectively fixedly connected to the outer ring body one 514 and the outer ring body two 517. A connecting plate 520 is fixedly connected to the middle part of the outer side of the slide rod 518.

[0033] On the outer side of the outer ring body two 517, fixing plates 521 are symmetrically and fixedly connected. Inside the fixing plates 521, inner rods 522 are slidably connected. The inner rods 522 are fixedly connected to the pressure rings 524. A fourth spring 523 is sleeved on the outer sides of the inner rods 522. Two ends of the fourth spring 523 are respectively fixedly connected to the fixing plates 521 and the pressure rings 524. The number of the inner rods 522 is not less than three.

[0034] On the outer side of the cylinder 57, a first chute 525 and a second chute 528 are symmetrically formed. The first chute 525 communicates with the second chute 528. Inside the first chute 525, a cross bar 526 is fixedly connected. On the outer side of the cross bar 526, a push bar 527 is slidably connected. The push bar 527 is slidably connected to the first chute 525. On one side of the push bar 527, an inclined block 529 is fixedly connected. The inclined block 529 is slidably connected to the second chute 528. The push bar 527 abuts against the connecting plate 520.

[0035] On the outer side of the inner ring 511, vertical grooves 530 are symmetrically formed. The number of the vertical grooves 530 is the same as that of the sliding rods 518. Inside the vertical grooves 530, fifth springs 531 are fixedly installed. One end of each fifth spring 531 is fixedly connected to a moving rod 532. On the outer sides of the moving rods 532, the same hard rubber strip 533 is fixedly connected. The hard rubber strip 533 passes through the second chute 528 and abuts against the inclined surface of the inclined block 529.

[0036] Example 1: As Figures 4 - 12 shown, an operator covers the cover body 3 on the outer side of the exhaust gas outlet of the working device, making the cover body 3 closely attached to the outer side of the working device. Then, the motor 53 is started. The motor 53 drives the rotating shaft 54 and the rotating member 58 to rotate. The rotating member 58 drives the fan blade part 59 and the support rod 510 to rotate. The fan blade part 59 rotates to draw air, facilitating the drawing of exhaust gas into the cover body 3 and the telescopic hose 2. The support rod 510 drives the inner ring 511 to rotate.

[0037] The moving rods 532 inside the inner ring 511 will slide outwards of the vertical grooves 530 under the action of centrifugal force. The moving rods 532 stretch the fifth springs 531 and squeeze the hard rubber strips 533. The hard rubber strips 533 are arranged in a circle, facilitating the hard rubber strips 533 to squeeze the inclined surfaces of multiple inclined blocks 529. The inclined blocks 529 drive the push bars 527 to slide on the outer sides of the cross bars 526. The push bars 527 simultaneously squeeze the connecting plate 520. The connecting plate 520 drives the sliding rods 518 and the outer ring body two 517 to slide. The sliding rods 518 stretch the third springs 519. The outer ring body two 517 drives the inner rods 522 and the pressure rings 524 to move, so that the pressure rings 524 are tightly pressed against the outer side of the working device.

[0038] The elastic force of the spring four 523 assists in pressing the pressing ring 524. When the connection between the working device and the cover body 3 becomes loose, the pressing ring 524 can still be tightly pressed against the outside of the exhaust port, thereby reducing the leakage of waste gas. And when the cover body 3 is angularly deflected, the cover body 3 and the cylinder 57 are angularly deflected. At this time, the cover body 3 squeezes the spring one 515, and the cylinder 57 stretches the spring two 516. The rotating sleeve 512 can rotate on the outside of the sphere 55 to adapt to the angular changes of the cover body 3 and the cylinder 57, so as to reduce the position offset of the outer ring body one 514, thereby maintaining the better pressing property of the pressing ring 524. Combined with the air extraction of the fan blade part 59, the waste gas collection effect is improved, and the problem that when the working device shakes or vibrates, the airtightness between the air collecting hood and the device may be insufficient, resulting in a small amount of polluted waste gas escaping outside the air collecting hood, reducing the airtightness and collection effect of waste gas collection is solved.

[0039] On the lower part of one side of the mounting plate 1 close to the telescopic hose 2, an adjusting assembly 6 is provided. The adjusting assembly 6 includes a cross plate 61 rotatably mounted on one side of the mounting plate 1. On the side of the cross plate 61 away from the mounting plate 1, a vertical shaft 62 is rotatably mounted. The top end of the vertical shaft 62 is fixedly connected to the fixed sleeve 4. On one side of the bottom of the cross plate 61, a collar 63 is fixedly connected. The vertical shaft 62 is rotatably connected to the collar 63.

[0040] A plug pin 64 is slidably mounted on the outside of the collar 63. On the outside of the vertical shaft 62, insertion holes 65 are symmetrically opened. The plug pin 64 is snap-fitted with the insertion holes 65. On one side of the mounting plate 1, a bottom plate 66 is also fixedly connected. The bottom plate 66 is located below the cross plate 61. On one side of the top of the bottom plate 66, an electric push rod 67 is fixedly installed. The telescopic end of the electric push rod 67 is fixedly connected to a top plate, and the top plate abuts against the cross plate 61.

[0041] Embodiment 2: As Figures 13 - 14 shown, when it is necessary to adjust the installation angle of the cover body 3, by pulling out the plug pin 64 and rotating the vertical shaft 62, the vertical shaft 62 drives the fixed sleeve 4 and the telescopic hose 2 to rotate, which is convenient for horizontally adjusting the angle. After adjustment, insert the plug pin 64 into the insertion hole 65 at the corresponding position to facilitate fixing the vertical shaft 62 again. By starting the electric push rod 67, the electric push rod 67 drives the top plate to expand and contract. When the top plate rises, it pushes the cross plate 61 to rise. When the top plate descends, the self-weight of the telescopic hose 2 and the cross plate 61 will drive the cross plate 61 to descend, so as to facilitate the vertical angle adjustment of the fixed sleeve 4 and the telescopic hose 2, improving the flexibility and airtightness of the subsequent installation of the cover body 3.

[0042] Working principle: When using this device, first, as Figures 1 - 14As shown, when it is necessary to adjust the installation angle of the cover body 3, by pulling out the bolt 64, it is convenient to adjust the angle horizontally. By starting the electric push rod 67, the electric push rod 67 drives the top plate to expand and contract, and the top plate assists the horizontal plate 61 to lift and adjust, so as to facilitate the vertical angle adjustment of the fixed sleeve 4 and the telescopic hose 2. The operator covers the cover body 3 outside the exhaust gas outlet of the working equipment, so that the cover body 3 is closely attached to the outside of the working equipment. Then, the motor 53 is started to work, and the fan blade part 59 rotates to draw air, so as to draw the exhaust gas into the cover body 3 and the telescopic hose 2. The support rod 510 drives the inner ring 511 to rotate, so as to facilitate the hard rubber strip 533 to squeeze the inclined surfaces of a plurality of inclined blocks 529. The inclined blocks 529 drive the push bar 527 to slide on the outside of the cross bar 526. The push bar 527 simultaneously squeezes the connecting plate 520. The connecting plate 520 drives the sliding rod 518 and the outer ring body two 517 to slide. The sliding rod 518 stretches the spring three 519, so that the pressing ring 524 is tightly pressed on the outside of the working equipment, reducing the leakage of exhaust gas. And when the cover body 3 is angularly deflected, the cover body 3 and the cylinder 57 are angularly deflected. At this time, the cover body 3 squeezes the spring one 515, and the cylinder 57 stretches the spring two 516. The rotating sleeve 512 can rotate on the outside of the sphere 55 to adapt to the angular change of the cover body 3 and the cylinder 57, and maintain the good pressing property of the pressing ring 524.

[0043] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An exhaust air suction hood for exhaust gas collection, comprising a mounting plate (1) and a telescopic hose (2) mounted on one side of the mounting plate (1). One end of the telescopic hose (2) away from the mounting plate (1) is connected to a hood body (3), and a fixing sleeve (4) is fixedly connected to the outer side of the telescopic hose (2). It is characterized in that It further includes: A sealing assembly (5) disposed inside the hood body (3), and an adjusting assembly (6) is provided at the lower part of the side of the mounting plate (1) close to the telescopic hose (2). The sealing assembly (5) includes a rotating part, a pressing part and an adjusting part. The rotating part includes vertical rods (51) symmetrically and fixedly installed on one side inside the hood body (3). An installation box (52) is fixedly connected between the two vertical rods (51). A motor (53) is fixedly installed inside the installation box (52). The output end of the motor (53) passes through the vertical rod (51) and is fixedly connected to a rotating shaft (54). One end of the rotating shaft (54) away from the motor (53) is fixedly connected to a rotating member (58) and a fan blade part (59). The pressing part includes an outer ring body one (514) and support rods (510) and an inner ring (511) installed on the outer side of the fan blade part (59). An outer ring body two (517) is slidably installed on the side of the outer ring body one (514) away from the telescopic hose (2). A slide rod (518) is connected between the outer ring body one (514) and the outer ring body two (517). One side of the outer ring body two (517) is connected to a pressing ring (524).

2. The exhaust air suction hood for exhaust gas collection according to claim 1, characterized in that: The adjusting part includes a sphere (55) fixedly connected to one side of the vertical rod (51). The rotating shaft (54) is rotatably connected to the sphere (55). One side of the sphere (55) away from the vertical rod (51) is fixedly connected to a fixing strip (56). One side of the fixing strip (56) away from the sphere (55) is fixedly connected to a cylinder (57). The rotating member (58) is rotatably installed with the fixing strip (56). The fan blade part (59) is located on the side of the rotating member (58) away from the rotating shaft (54). The support rods (510) are symmetrically and fixedly connected to the outer side of the rotating member (58).

3. The exhaust air suction hood for exhaust gas collection according to claim 2, wherein: The inner ring (511) is in fit with the inner wall of the cylinder (57). A rotating sleeve (512) is sleeved on the outer side of the sphere (55). The rotating sleeve (512) is rotatably connected to the sphere (55). Diagonal rods (513) are symmetrically and fixedly connected to the outer side of the rotating sleeve (512). One end of the diagonal rod (513) away from the rotating sleeve (512) is fixedly connected to the outer ring body one (514). A first spring (515) is fixedly installed between the outer ring body one (514) and the inner wall of the hood body (3). A second spring (516) is fixedly installed between the inner wall of the outer ring body one (514) and the outer wall of the cylinder (57).

4. The exhaust air suction hood for exhaust gas collection according to claim 3, wherein: The slide bar (518) is fixedly connected to the outer ring body two (517). There are no less than three slide bars (518). The slide bar (518) is slidably connected to the outer ring body one (514). A third spring (519) is sleeved on the outer side of the slide bar (518). The two ends of the third spring (519) are respectively fixedly connected to the outer ring body one (514) and the outer ring body two (517). A connecting plate (520) is fixedly connected to the middle part of the outer side of the slide bar (518).

5. The exhaust air suction hood for exhaust gas collection according to claim 4, characterized in that: Fixing plates (521) are symmetrically and fixedly connected to the outer side of the outer ring body two (517). An inner rod (522) is slidably connected inside the fixing plate (521). The inner rod (522) is fixedly connected to the pressing ring (524). A fourth spring (523) is sleeved on the outer side of the inner rod (522). The two ends of the fourth spring (523) are respectively fixedly connected to the fixing plate (521) and the pressing ring (524). There are no less than three inner rods (522).

6. The exhaust air suction hood for exhaust gas collection according to claim 5, characterized in that: A first chute (525) and a second chute (528) are symmetrically formed on the outer side of the cylinder (57). The first chute (525) communicates with the second chute (528). A cross bar (526) is fixedly connected inside the first chute (525). A push bar (527) is slidably connected to the outer side of the cross bar (526). The push bar (527) is slidably connected to the first chute (525). An inclined block (529) is fixedly connected to one side of the push bar (527). The inclined block (529) is slidably connected to the second chute (528). The push bar (527) abuts against the connecting plate (520).

7. The exhaust air suction hood for exhaust gas collection according to claim 6, characterized in that: Vertical grooves (530) are symmetrically formed on the outer side of the inner ring (511). The number of the vertical grooves (530) is the same as that of the slide bars (518). A fifth spring (531) is fixedly installed inside the vertical groove (530). One end of the fifth spring (531) is fixedly connected to a moving rod (532). The same hard rubber strip (533) is fixedly connected to the outer side of the moving rod (532). The hard rubber strip (533) passes through the second chute (528) and abuts against the inclined surface of the inclined block (529).

8. The exhaust air suction hood for exhaust gas collection according to claim 1, characterized in that: The adjusting assembly (6) includes a cross plate (61) rotatably installed on one side of the mounting plate (1). A vertical shaft (62) is rotatably installed on the side of the cross plate (61) away from the mounting plate (1). The top end of the vertical shaft (62) is fixedly connected to the fixing sleeve (4). A collar (63) is fixedly connected to one side of the bottom of the cross plate (61). The vertical shaft (62) is rotatably connected to the collar (63).

9. The exhaust air suction hood for exhaust gas collection according to claim 8, characterized in that: A pin (64) is slidably installed on the outer side of the collar (63). Jacks (65) are symmetrically formed on the outer side of the vertical shaft (62). The pin (64) is snap-fitted with the jack (65). A bottom plate (66) is also fixedly connected to one side of the mounting plate (1). The bottom plate (66) is located below the cross plate (61). An electric push rod (67) is fixedly installed on the top side of the bottom plate (66). The telescopic end of the electric push rod (67) is fixedly connected to a top plate, and the top plate abuts against the cross plate (61).

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