CN219073008U - Waste gas collecting and purifying workbench - Google Patents

Abstract

The utility model provides an exhaust gas collecting and purifying workbench, which relates to the technical field of laboratory equipment and comprises the following components: a support column; four support columns are arranged in total; the four support columns are arranged in a rectangular array; the left end surfaces of the four support columns are respectively provided with a guide chute in a penetrating way; the inner sides of the four support columns are fixedly connected with a connecting frame; a driving motor is fixedly connected with the bottom end surface of the connecting frame through a central bolt; two mounting seats are symmetrically and fixedly connected to the top end surface of the connecting frame. Along with the active carbon filter box is pulled out the drive rack and can drive the double-sided rack through the drive gear and slide the double-sided rack and slide can with control gear meshing behind the certain distance and drive control gear and rotate and seal the air-out pipe down with the closing plate, solved and still be in the circulation state with the inside air of filter box back workstation and the problem that remains uncleaned waste gas in the workstation was leaked out easily this moment.

Description

Waste gas collecting and purifying workbench

Technical Field

The utility model relates to the technical field of laboratory equipment, in particular to an exhaust gas collecting and purifying workbench.

Background

In the laboratory carry out the in-process of experiment can produce a large amount of waste gases generally, and these waste gases can cause the pollution to the environment in the laboratory, consequently laboratory personnel can use the workstation that has waste gas collection purification performance to carry out the experiment, and current workstation comprises fan and rose box two parts generally, collects waste gas through the negative pressure that the fan produced, and the waste gas of collection is purified the back and is discharged in being input the rose box.

For example: the utility model with the application number of CN202020741245.0 discloses an ultra-clean workbench for a laboratory, which comprises a workbench body and a base, wherein an illuminating lamp and an ultraviolet sterilizing lamp are sequentially and fixedly arranged at the top of an inner cavity of the workbench body from left to right, a vessel placing rack and a fixing seat are sequentially and fixedly connected to the rear side of the inner cavity of the workbench body from top to bottom, a motor is fixedly arranged on the right side of the fixing seat, a threaded rod is fixedly connected to the output end of the motor, a movable block is connected to the outer surface of the threaded rod in a threaded manner, a sliding block is fixedly connected to one side of the movable block, and a fixing plate is fixedly connected to one side of the sliding block. According to the utility model, through the functions of the fan, the motor, the filter box, the threaded rod, the movable block, the sliding block, the fixed plate, the brush plate and the ultraviolet sterilization lamp, the problems that the existing ultra-clean workbench cannot clean waste gas and dust generated after experiments and cannot guarantee the cleaning and sterilization effects of the surface of the workbench are solved.

However, for the conventional workbench at present, the filter box needs to be cleaned regularly in the use process of the workbench, but the air in the workbench is still in a circulating state after the filter box is taken down, so that the residual unpurified waste gas in the workbench is easy to leak out, and the environment in the laboratory is polluted.

Disclosure of Invention

In view of the above, the present utility model provides an exhaust gas collecting and purifying workbench, which has a sealing plate capable of automatically sealing an air outlet pipe after an activated carbon filter box is taken out, wherein when the activated carbon filter box is taken down for cleaning, the activated carbon filter box can be pulled out only by rotating down a fastening bolt, along with the fact that the activated carbon filter box is pulled out, a transmission rack drives a transmission gear to rotate, the transmission gear is driven to slide in the rotating process of the transmission gear, the double-sided rack slides a certain distance and then is meshed with a control gear to drive the control gear to rotate, the rotation of the control gear drives a fixed rotating shaft to rotate, and then the sealing plate is rotated down to seal the air outlet pipe, so that the residual exhaust gas in the air outlet pipe pollutes the surrounding environment after the activated carbon filter box is taken down, the safety and the practicability of the workbench are improved, the sealing plate is reset after the activated carbon filter box is inserted into the air outlet pipe, the double-sided rack is reset, the connection limit is provided for the activated carbon filter box and the air outlet pipe, and the connection between the activated carbon filter box and the air outlet pipe is more stable.

The utility model provides an exhaust gas collecting and purifying workbench, which specifically comprises the following components: a support column; four support columns are arranged in total; the four support columns are arranged in a rectangular array; the left end surfaces of the four support columns are respectively provided with a guide chute in a penetrating way; the inner sides of the four support columns are fixedly connected with a connecting frame; a driving motor is fixedly connected with the bottom end surface of the connecting frame through a central bolt; two mounting seats are symmetrically and fixedly connected to the top end surface of the connecting frame; a lifting column is connected in the four support columns in a sliding manner; the top end surfaces of the four lifting columns are fixedly connected with a workbench body; the top end surface of the workbench body is fixedly connected with a protective shell; two mounting grooves are symmetrically formed in the upper part of the front end face of the workbench body; the right end face of the workbench body is hinged with a connecting door; the front end face of the connecting door is fixedly connected with a mounting plate; the mounting panel passes through fastening bolt fastening connection at the right-hand member face of workstation body.

Optionally, an operation plate is slidably connected to the front part of the top end of the workbench body; the top end of the operation plate is provided with a rectangular array through air leakage grooves; a driving fan is fixedly arranged in the front part of the workbench body; the front end face of the driving fan is connected with a gas pipe; the tail end of the gas pipe is fixedly connected with a collecting hopper; the collecting hopper is aligned with the position of the operating panel.

Optionally, the bottom end surfaces of the two mounting grooves are fixedly connected with a supporting spring; the tail ends of the two supporting springs are fixedly connected with a sliding plate; the sliding plate is connected in the two mounting grooves in a sliding way; two fixed inserted bars are symmetrically and fixedly connected to the top end surface of the sliding plate; the two fixed inserted bars are respectively inserted into the left side and the right side of the operation plate.

Optionally, the rear end face of the driving fan is fixedly connected with an air outlet pipe; the right end face of the workbench body is connected with an active carbon filter box in a sliding manner; the active carbon filter box is inserted into the air outlet pipe; an exhaust pipe is inserted into the top end surface of the active carbon filter box; the left part of the front end surface of the active carbon filter box and the left part of the rear end surface of the active carbon filter box are fixedly connected with a transmission rack; the right part of the front end surface of the air outlet pipe and the right part of the rear end surface of the air outlet pipe are respectively and rotatably connected with a transmission gear; the transmission gear is meshed with the transmission rack.

Optionally, the upper parts of the two transmission gears are respectively meshed with a double-sided rack; the second mounting sliding grooves are aligned with the positions of the two first mounting sliding grooves respectively; the double-sided racks on the same side are respectively and slidably connected in the first installation chute on the same side and the second installation chute on the same side; the upper part of the air outlet pipe is rotationally connected with a fixed rotating shaft; two control gears are symmetrically and fixedly connected to the outer wall of the fixed rotating shaft; the two control gears are aligned with the positions of the two double-sided racks respectively; a sealing plate is fixedly connected to the outer wall of the fixed rotating shaft in the middle; the top end surface of the inner wall of the air outlet pipe is fixedly connected with a first magnetic attraction block.

Optionally, a second magnetic block is fixedly connected with the top end surface of the sealing plate in the middle; the second magnetic block is aligned with the first magnetic block; the top end face of the second magnetic block is contacted with the bottom end face of the first magnetic block, so that the sealing plate is adsorbed on the first magnetic block through the second magnetic block when the double-sided rack is not contacted with the control gear, and then the sealing plate is fixed on the inner wall of the air outlet pipe, and the sealing plate is prevented from falling to hinder the purification of waste gas.

Optionally, a fixed block is arranged on the outer wall of the exhaust pipe; the rear end face of the workbench body is fixedly provided with a hydraulic push rod; the fixed block is fixedly connected to the top end face of the hydraulic push rod.

Optionally, two groups of mounting lamp holders are symmetrically and fixedly connected to the top end surface of the protective shell; an ultraviolet lamp is fixedly arranged in each of the two groups of the installation lamp holders.

Optionally, the top end surface of the driving motor is coaxially connected with a transmission worm; a transmission shaft is rotatably connected in each of the two mounting seats; the outer walls of the two transmission shafts are fixedly connected with a transmission worm wheel in the middle; both drive worm wheels are meshed with the drive worm.

Optionally, the outer walls of the two transmission shafts are fixedly connected with a swinging support rod; the four swing support rods are respectively and slidably connected in the four guide sliding grooves; the front end surfaces of the four swing supporting rods are respectively provided with a connecting chute in a penetrating way; the lower parts of the four lifting columns are respectively and slidably connected in the four connecting sliding grooves.

Advantageous effects

According to the utility model, when the activated carbon filter box is disassembled and cleaned, the air outlet pipe can be automatically sealed, the influence of the outflow of residual waste gas in the air outlet pipe on the surrounding environment is prevented, the practicability and the safety of the workbench are effectively improved, and secondly, the operation panel is conveniently and quickly taken down by a worker for cleaning, so that the structure is simple, the operation is quick, and the use is more convenient.

In addition, as the active carbon filter box is pulled out, the transmission rack can drive the transmission gear to rotate, the transmission gear can drive the double-sided rack to slide in the rotating process of the transmission gear, the double-sided rack can be meshed with the control gear after sliding for a certain distance and drive the control gear to rotate, the fixed rotating shaft is driven to rotate through the rotation of the control gear, further the sealing plate is rotated down to seal the air outlet pipe, the pollution to the surrounding environment caused by the outflow of the residual waste gas in the air outlet pipe after the active carbon filter box is taken down is prevented, the safety and the practicability of the workbench are improved,

in addition, when the staff wants to wash the operation panel, only need press the sliding plate and make the sliding plate slide in the mounting groove and extrude supporting spring, after fixed inserted bar breaks away from with the operation panel, the staff can pull out the operation panel from the workstation body and wash the operation panel, easy operation is swift, and it is more convenient to use.

In addition, start driving motor, make driving motor drive worm rotate, rotate through drive worm's rotation drive two transmission worm wheels, rotate through drive worm wheel's rotation drive two transmission shafts, can drive swing branch along the direction spout at transmission shaft pivoted in-process and swing, drive the lift post and slide in connecting the spout and jack-up the lift post at the gliding in-process of swing branch, and then can make the experimenter adjust the height of workstation according to self user demand, further improved the practicality of workstation.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings of the embodiments will be briefly described below.

In the drawings:

FIG. 1 is a schematic diagram of an axial structure of the present utility model.

Fig. 2 is a schematic diagram of the rear-view isometric structure of the present utility model.

Fig. 3 is a schematic cross-sectional view of the present utility model.

Fig. 4 is an enlarged schematic view of the structure of fig. 3 at a in accordance with the present utility model.

Fig. 5 is a schematic cross-sectional view of the table body of the present utility model.

Fig. 6 is an enlarged schematic view of the structure of fig. 5B according to the present utility model.

FIG. 7 is a schematic cross-sectional view of the air outlet duct of the present utility model.

FIG. 8 is a schematic cross-sectional view of a support column of the present utility model.

List of reference numerals

1. A support column; 101. a guide chute; 102. a connecting frame; 103. a driving motor; 104. a drive worm; 105. a mounting base; 106. a transmission shaft; 107. a drive worm wheel; 108. swinging the supporting rod; 109. the connecting chute; 110. lifting columns; 111. a workbench body; 112. a mounting groove; 113. a sliding plate; 114. a support spring; 115. fixing the inserted link; 116. an operation panel; 117. an air leakage groove; 118. a protective housing; 119. installing a lamp holder; 120. an ultraviolet lamp; 121. a collection bucket; 122. a gas pipe; 123. driving a fan; 124. an air outlet pipe; 125. fixing the rotating shaft; 126. a sealing plate; 127. a first magnetic block; 128. a second magnetic block; 129. a control gear; 130. a drive rack; 131. a transmission gear; 132. double-sided racks; 133. a first mounting chute; 134. an active carbon filter box; 135. an exhaust pipe; 136. a hydraulic push rod; 137. a fixed block; 138. a connecting door; 139. a mounting plate; 140. a fastening bolt; 141. and a second installation chute.

Detailed Description

In order to make the objects, aspects and advantages of the technical solution of the present utility model more clear, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiment of the present utility model. Unless otherwise indicated, terms used herein have the meaning common in the art. Like reference numerals in the drawings denote like parts.

Examples: please refer to fig. 1 to 8:

the utility model provides an exhaust gas collecting and purifying workbench, which comprises: a support column 1;

four support columns 1 are arranged in total; the four support columns 1 are arranged in a rectangular array; the left end surfaces of the four support columns 1 are provided with a guide chute 101 in a penetrating way; the inner sides of the four support columns 1 are fixedly connected with a connecting frame 102; a driving motor 103 is fastened and connected with the bottom end surface of the connecting frame 102 through a central bolt; two mounting seats 105 are symmetrically and fixedly connected to the top end surface of the connecting frame 102; a lifting column 110 is slidably connected in each of the four support columns 1; the top end surfaces of the four lifting columns 110 are fixedly connected with a workbench body 111; a protective housing 118 is fixedly connected to the top end surface of the workbench body 111; two mounting grooves 112 are symmetrically formed in the upper part of the front end surface of the workbench body 111; a connecting door 138 is hinged to the right end surface of the workbench body 111; the front end surface of the connecting door 138 is fixedly connected with a mounting plate 139; the mounting plate 139 is fastened to the right end surface of the table body 111 by a fastening bolt 140.

Furthermore, according to the embodiment of the present utility model, as shown in fig. 1 and 5, an operation plate 116 is slidably coupled to the front of the top surface of the table body 111; the top end of the operation plate 116 is provided with a rectangular array through air leakage grooves 117; a driving fan 123 is fixedly installed in the front of the workbench body 111; the front end face of the driving fan 123 is connected with a gas pipe 122; the tail end of the air pipe 122 is fixedly connected with a collecting hopper 121; the position alignment of collection fill 121 and operation board 116 to the staff can carry out experimental operation through operation board 116, and the in-process staff of operation can start driving fan 123, and driving fan 123 makes the workstation body 111 produce negative pressure, makes the waste gas that produces in the operation process get into through gas leakage groove 117 in the collection fill 121, and gets into in the gas-supply pipe 122 via collection fill 121.

In addition, according to the embodiment of the present utility model, as shown in fig. 3 and 4, one supporting spring 114 is fixedly connected to the bottom end surfaces of both the installation grooves 112; the tail ends of the two supporting springs 114 are fixedly connected with a sliding plate 113; the sliding plate 113 is slidably coupled in the two mounting grooves 112; two fixed inserting rods 115 are symmetrically and fixedly connected to the top end surface of the sliding plate 113; the two fixed inserting rods 115 are respectively inserted into the left side and the right side of the operation plate 116, so that when a worker wants to clean the operation plate 116, the worker only needs to press the sliding plate 113 to enable the sliding plate 113 to slide in the mounting groove 112 and squeeze the supporting springs 114, and when the fixed inserting rods 115 are separated from the operation plate 116, the worker can pull the operation plate 116 out of the workbench body 111 to clean the operation plate 116, the operation is simple and quick, and the use is more convenient.

In addition, according to the embodiment of the present utility model, as shown in fig. 5 and 6, a rear end surface of the driving fan 123 is fixedly connected with an air outlet pipe 124; the right end surface of the workbench body 111 is connected with an active carbon filter box 134 in a sliding manner; the activated carbon filter box 134 is inserted in the air outlet pipe 124; an exhaust pipe 135 is inserted into the top end surface of the active carbon filter box 134; the left part of the front end surface of the active carbon filter box 134 and the left part of the rear end surface of the active carbon filter box 134 are fixedly connected with a transmission rack 130; a transmission gear 131 is rotatably connected to the right part of the front end surface of the air outlet pipe 124 and the right part of the rear end surface of the air outlet pipe 124; the transmission gear 131 is meshed with the transmission rack 130, so that waste gas in the gas pipe 122 is input into the gas outlet pipe 124 by the driving fan 123, then the waste gas is input into the activated carbon filter box 134 by the gas outlet pipe 124 for purification, the purified waste gas is discharged from the activated carbon filter box 134 through the exhaust pipe 135, the activated carbon filter box 134 can be pulled out only by rotating the fastening bolt 140 when the activated carbon filter box 134 is taken down for cleaning, and the transmission rack 130 drives the transmission gear 131 to rotate along with the pulling out of the activated carbon filter box 134.

Further, according to the embodiment of the present utility model, as shown in fig. 5 and 6, upper portions of both transmission gears 131 are engaged with one double-sided rack 132; the second installation sliding grooves 141 are aligned with the positions of the two first installation sliding grooves 133 respectively; the same-side double-sided rack 132 is respectively and slidably connected in the same-side first installation chute 133 and the same-side second installation chute 141; a fixed rotating shaft 125 is rotatably connected to the upper part of the air outlet pipe 124; two control gears 129 are symmetrically and fixedly connected to the outer wall of the fixed rotating shaft 125; the two control gears 129 are aligned with the positions of the two double-sided racks 132, respectively; a sealing plate 126 is fixedly connected to the outer wall of the fixed rotating shaft 125 in the middle; the top end surface fixedly connected with first magnetism piece 127 of the inner wall of play tuber pipe 124 to can drive double-sided rack 132 at transmission gear 131 pivoted in-process and slide, can mesh with control gear 129 and drive control gear 129 and rotate after double-sided rack 132 slides certain distance, rotate through the rotation drive fixed pivot 125 of control gear 129, and then seal up tuber pipe 124 down with closing plate 126, prevent to take off the back at activated carbon filter case 134 and go out the waste gas outflow that remains in the tuber pipe 124 and cause the pollution to the surrounding environment, improve the security and the practicality of workstation, can make closing plate 126 reset after activated carbon filter case 134 inserts tuber pipe 124, and make double-sided rack 132 reset, can provide the connection spacing for activated carbon filter case 134 and play tuber pipe 124 after double-sided rack 132 resets, make the connection of activated carbon filter case 134 and play tuber pipe 124 more firm.

In addition, according to the embodiment of the present utility model, as shown in fig. 7, a second magnetic attraction block 128 is fixedly connected to the top end surface of the sealing plate 126 in the middle; the second magnetic block 128 is aligned with the first magnetic block 127; the top end surface of the second magnetic block 128 contacts with the bottom end surface of the first magnetic block 127, so that when the double-sided rack 132 is not contacted with the control gear 129, the sealing plate 126 is adsorbed on the first magnetic block 127 through the second magnetic block 128, and then the sealing plate 126 is fixed on the inner wall of the air outlet pipe 124, so that the sealing plate 126 is prevented from falling to hinder the purification of waste gas.

Further, according to an embodiment of the present utility model, as shown in fig. 2 and 5, a fixing block 137 is provided on the outer wall of the exhaust pipe 135; a hydraulic push rod 136 is fixedly arranged on the rear end surface of the workbench body 111; the fixed block 137 is fixedly connected to the top end face of the hydraulic push rod 136, so that the hydraulic push rod 136 is started to push the fixed block 137 to perform lifting motion, the exhaust pipe 135 is driven to swing through the lifting motion of the fixed block 137, and the angle of the exhaust pipe 135 is adjusted, so that the exhaust pipe 135 can be better connected with a ventilation system of a laboratory.

In addition, according to an embodiment of the present utility model, as shown in fig. 3, two sets of mounting sockets 119 are symmetrically and fixedly connected to the top end surface of the protective housing 118; an ultraviolet lamp 120 is fixedly installed in each of the two sets of installation lamp holders 119, so that the experimental apparatus on the workbench body 111 can be sterilized by the ultraviolet lamp 120, and the safety of the workbench is improved.

In addition, according to the embodiment of the present utility model, as shown in fig. 3 and 8, a transmission worm 104 is coaxially connected to the top end surface of the driving motor 103; a transmission shaft 106 is rotatably connected in each of the two mounting seats 105; a transmission worm wheel 107 is fixedly connected to the outer walls of the two transmission shafts 106 in the middle; the two transmission worm gears 107 are meshed with the transmission worm 104, so that the driving motor 103 is started, the driving motor 103 drives the transmission worm 104 to rotate, the two transmission worm gears 107 are driven to rotate through the rotation of the transmission worm 104, and the two transmission shafts 106 are driven to rotate through the rotation of the transmission worm gears 107.

In addition, according to the embodiment of the present utility model, as shown in fig. 3 and 8, a swinging strut 108 is fixedly connected to the outer walls of the two transmission shafts 106; the four swing support rods 108 are respectively and slidably connected in the four guide sliding grooves 101; the front end surfaces of the four swing support rods 108 are respectively provided with a connecting chute 109 in a penetrating way; the lower parts of the four lifting columns 110 are respectively and slidably connected in the four connecting sliding grooves 109, so that the swing supporting rods 108 can be driven to swing along the guide sliding grooves 101 in the rotating process of the transmission shaft 106, the lifting columns 110 are driven to slide in the connecting sliding grooves 109 and jack up the lifting columns 110 in the sliding process of the swing supporting rods 108, and then an experimenter can adjust the height of the workbench according to the use requirement of the experimenter, so that the practicability of the workbench is improved.

Specific use and action of the embodiment:

the staff can perform experimental operation through the operation plate 116, the staff can start the driving fan 123 in the operation process, the driving fan 123 can generate negative pressure in the workbench body 111, waste gas generated in the operation process enters the collecting hopper 121 through the air leakage groove 117 and enters the gas pipe 122 through the collecting hopper 121, when the staff wants to clean the operation plate 116, the staff only needs to press the sliding plate 113 to slide in the mounting groove 112 and squeeze the supporting spring 114, after the fixed inserting rod 115 is separated from the operation plate 116, the staff can pull the operation plate 116 out of the workbench body 111 to clean the operation plate 116, the operation is simple and quick, the use is more convenient, the waste gas in the gas pipe 122 can be input into the air outlet pipe 124 through the driving fan 123, then the waste gas is input into the activated carbon filter box 134 through the air outlet pipe 124 for purification, the activated carbon filter box 134 can discharge the purified waste gas through the exhaust pipe 135, when the activated carbon filter box 134 is taken down for cleaning, the activated carbon filter box 134 can be pulled out only by rotating down the fastening bolt 140, along with the pulled-out of the activated carbon filter box 134, the transmission rack 130 can drive the transmission gear 131 to rotate, the double-sided rack 132 can be driven to slide in the rotating process of the transmission gear 131, the double-sided rack 132 can be meshed with the control gear 129 and drive the control gear 129 to rotate after sliding for a certain distance, the fixed rotating shaft 125 is driven to rotate through the rotation of the control gear 129, the sealing plate 126 is further rotated down for sealing the air outlet pipe 124, the pollution to the surrounding environment caused by the outflow of the waste gas remained in the air outlet pipe 124 after the activated carbon filter box 134 is taken down is prevented, the safety and the practicability of the workbench are improved, the sealing plate 126 is reset after the active carbon filter box 134 is inserted into the air outlet pipe 124, and the double-sided rack 132 is reset, connection limit is provided for the active carbon filter box 134 and the air outlet pipe 124 after the double-sided rack 132 is reset, connection between the active carbon filter box 134 and the air outlet pipe 124 is more stable, the sealing plate 126 is adsorbed on the first magnetic block 127 through the second magnetic block 128 when the double-sided rack 132 is not contacted with the control gear 129, further the sealing plate 126 is fixed on the inner wall of the air outlet pipe 124, the sealing plate 126 is prevented from falling to prevent waste gas from being purified, the hydraulic push rod 136 is started to push the fixing block 137 to perform lifting motion, the exhaust pipe 135 is driven to swing through lifting motion of the fixing block 137, then the angle of the exhaust pipe 135 is adjusted, the exhaust pipe 135 can be better connected with a ventilation system of a laboratory, the laboratory equipment on the workbench body 111 can be disinfected through the ultraviolet lamp 120, safety of the workbench is improved, the driving motor 103 is started, the driving worm 104 is driven to rotate by the driving motor 103, the driving worm 104, the two driving worm gears 107 are driven to rotate by the driving worm 104, and the driving worm 107, and the driving shafts 107 are driven to rotate by the driving worm 107, and the driving shafts 106 to rotate.

Claims (10)

1. An exhaust gas collection and purification workbench, comprising: a support column (1); four support columns (1) are arranged in total; the four support columns (1) are arranged in a rectangular array shape; the left end faces of the four support columns (1) are respectively provided with a guide chute (101) in a penetrating way; the inner sides of the four support columns (1) are fixedly connected with a connecting frame (102); a driving motor (103) is fastened and connected with the bottom end surface of the connecting frame (102) through a central bolt; two mounting seats (105) are symmetrically and fixedly connected to the top end surface of the connecting frame (102); a lifting column (110) is slidably connected in each of the four support columns (1); the top end surfaces of the four lifting columns (110) are fixedly connected with a workbench body (111); the top end surface of the workbench body (111) is fixedly connected with a protective shell (118); two mounting grooves (112) are symmetrically formed in the upper part of the front end surface of the workbench body (111); the right end face of the workbench body (111) is hinged with a connecting door (138); the front end face of the connecting door (138) is fixedly connected with a mounting plate (139); the mounting plate (139) is fastened and connected to the right end face of the workbench body (111) through a fastening bolt (140).

2. An exhaust gas collection and purification table as claimed in claim 1, wherein: an operation plate (116) is connected to the front part of the top end face of the workbench body (111) in a sliding manner; the top end of the operation plate (116) is provided with a rectangular array through air leakage grooves (117); a driving fan (123) is fixedly arranged in the front part of the workbench body (111); the front end face of the driving fan (123) is connected with a gas pipe (122); the tail end of the air pipe (122) is fixedly connected with a collecting hopper (121); the collection hopper (121) is aligned with the position of the operation plate (116).

3. An exhaust gas collection and purification table as claimed in claim 1, wherein: the bottom end surfaces of the two mounting grooves (112) are fixedly connected with a supporting spring (114); the tail ends of the two supporting springs (114) are fixedly connected with a sliding plate (113); the sliding plate (113) is connected in the two mounting grooves (112) in a sliding way; two fixed inserted rods (115) are symmetrically and fixedly connected to the top end surface of the sliding plate (113); the two fixed inserting rods (115) are respectively inserted into the left side and the right side of the operation plate (116).

4. An exhaust gas collection and purification table as claimed in claim 2, wherein: the rear end face of the driving fan (123) is fixedly connected with an air outlet pipe (124); the right end face of the workbench body (111) is connected with an active carbon filter box (134) in a sliding way; the active carbon filter box (134) is inserted in the air outlet pipe (124); an exhaust pipe (135) is inserted into the top end surface of the active carbon filter box (134); the left part of the front end surface of the active carbon filter box (134) and the left part of the rear end surface of the active carbon filter box (134) are fixedly connected with a transmission rack (130); the right part of the front end surface of the air outlet pipe (124) and the right part of the rear end surface of the air outlet pipe (124) are both rotationally connected with a transmission gear (131); the transmission gear (131) is meshed with the transmission rack (130).

5. An exhaust gas collection and purification table as claimed in claim 4, wherein: the upper parts of the two transmission gears (131) are respectively meshed with a double-sided rack (132); the second mounting sliding grooves (141) are respectively aligned with the positions of the two first mounting sliding grooves (133); the same-side double-sided rack (132) is respectively and slidably connected in the same-side first installation chute (133) and the same-side second installation chute (141); the upper part of the air outlet pipe (124) is rotationally connected with a fixed rotating shaft (125); two control gears (129) are symmetrically and fixedly connected to the outer wall of the fixed rotating shaft (125); the two control gears (129) are respectively aligned with the positions of the two double-sided racks (132); a sealing plate (126) is fixedly connected to the outer wall of the fixed rotating shaft (125) in the middle; the top end surface of the inner wall of the air outlet pipe (124) is fixedly connected with a first magnetic attraction block (127).

6. An exhaust gas collection and purification table as claimed in claim 5, wherein: a second magnetic block (128) is fixedly connected to the center of the top end surface of the sealing plate (126); the second magnetic block (128) is aligned with the first magnetic block (127); the top end surface of the second magnetic block (128) is contacted with the bottom end surface of the first magnetic block (127), so that when the double-sided rack (132) is not contacted with the control gear (129), the sealing plate (126) is adsorbed on the first magnetic block (127) through the second magnetic block (128), and then the sealing plate (126) is fixed on the inner wall of the air outlet pipe (124), and the sealing plate (126) is prevented from falling to hinder the purification of waste gas.

7. An exhaust gas collection and purification table as claimed in claim 4, wherein: the outer wall of the exhaust pipe (135) is provided with a fixed block (137); a hydraulic push rod (136) is fixedly arranged on the rear end surface of the workbench body (111); the fixed block (137) is fixedly connected to the top end surface of the hydraulic push rod (136).

8. An exhaust gas collection and purification table as claimed in claim 1, wherein: two groups of mounting lamp holders (119) are symmetrically and fixedly connected to the top end surface of the protective shell (118); an ultraviolet lamp (120) is fixedly arranged in each of the two groups of mounting lamp holders (119).

9. An exhaust gas collection and purification table as claimed in claim 1, wherein: the top end surface of the driving motor (103) is coaxially connected with a transmission worm (104); a transmission shaft (106) is rotatably connected in each of the two mounting seats (105); the outer walls of the two transmission shafts (106) are fixedly connected with a transmission worm wheel (107) in the middle; both drive worm wheels (107) are engaged with the drive worm (104).

10. An exhaust gas collection and purification table as claimed in claim 9, wherein: the outer walls of the two transmission shafts (106) are fixedly connected with a swinging support rod (108); the four swing support rods (108) are respectively and slidably connected in the four guide sliding grooves (101); the front end surfaces of the four swing support rods (108) are respectively provided with a connecting chute (109) in a penetrating way; the lower parts of the four lifting columns (110) are respectively and slidably connected in the four connecting sliding grooves (109).

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