Ventilation system for purifying gas for laboratory ventilation

Abstract

The invention provides a gas purification ventilation system for laboratory ventilation, and belongs to the technical field of laboratory gas treatment ventilation, the gas purification ventilation system comprises an outer box, an exposed opening is reserved in the side of the outer box, a rotating table is rotationally connected in the outer box, two placing openings are reserved in the wall surface of the rotating table, and first net cylinders are arranged in the placing openings; and the interior of the placing opening is connected with a constraint supporting unit. The problems that in the long-term application period of the screening part, due to dust accumulation, replacement treatment needs to be conducted, but when the screening part is replaced, a ventilation system needs to be stopped, and operation of a laboratory is hindered are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of laboratory gas treatment ventilation, and in particular relates to a ventilation system for purifying gas for laboratory ventilation. Background Art

[0002] Currently, laboratory gas control technology is relatively lacking. The common method for treating laboratory gases is to ventilate them outdoors through ventilation hoods and fans, where they are diluted with air before being discharged. While this method is an effective way to ensure indoor air quality and protect the health and safety of laboratory personnel, it pollutes the atmosphere surrounding the laboratory area, directly affecting ambient air quality. Therefore, the use of purification equipment is essential for ventilation and purification.

[0003] Usually, chemical reactions and screening elements and mesh cylinders are used to cooperate to perform purification ventilation. However, during long-term use, the screening elements need to be replaced due to dust accumulation. However, when the screening elements are replaced, the ventilation system has to be shut down, which hinders the operation of the laboratory. Therefore, a ventilation system with gas purification for laboratory ventilation is proposed. Summary of the Invention

[0004] The present invention provides a ventilation system for gas purification for laboratory ventilation, which aims to solve the problem that during long-term use, a screening piece needs to be replaced due to dust accumulation, but when the screening piece is replaced, the ventilation system needs to be stopped, which hinders the operation of the laboratory.

[0005] An embodiment of the present invention provides a ventilation system for gas purification for laboratory ventilation, comprising an outer box, a side of the outer box having an exposure opening reserved thereon, a rotating table being rotatably connected to the inner side of the outer box, a wall surface of the rotating table having two placement openings reserved thereon, a mesh cylinder being installed in each of the placement openings, and a restraining support unit being connected inwardly to the placement openings;

[0006] The top of the outer box is fixedly connected to the input channel, and the input channel is located at the upper part of the adapted placement port. The side of the outer box farther from the exposure port is fixedly connected to the output channel, and one end of the output channel is fixedly connected to the feed channel, and the feed channel is connected to the reaction box and extends into the reaction box. One side of the reaction box is provided with an external delivery channel, and a replacement channel is provided at the lower part of one side of the reaction box. A valve is provided on the replacement channel. Two connecting holes are reserved on the wall of the rotating table, and the connecting holes are respectively connected to the adapted placement port. One end of the output channel is connected to the adapted connecting hole. A placement cylinder is provided between the input channel and the output channel, and a second replacement net cylinder is provided inside the placement cylinder, and the placement cylinder is connected to the purification switching unit.

[0007] Furthermore, the purification switching unit includes a motion channel 1 and a motion channel 2, wherein the motion channel 1 is fixedly connected to one end of the placement cylinder, the motion channel 1 is slidably connected to the input channel, a through hole 1 is reserved on the motion channel 1, and the through hole 1 is inside the input channel, and an input port is reserved on one side of the opening of the motion channel 1 closer to the input channel, and the input port is located at the tail of the input channel, and a rubber gasket 1 is fixedly connected to both the upper and tail sides of the input channel, and the rubber gasket 1 is slidably installed on the motion channel 1, the motion channel 2 is fixedly connected to the tail of the placement cylinder, and the motion channel 2 It is slidingly installed on the output channel, and a second through hole is reserved on the second movement channel, and the second through hole is located inside the output channel. An output port is reserved on the side of the second movement channel closer to the opening of the output channel, and the output port is located at the tail of the output channel. Rubber gaskets are fixedly connected to both sides of the upper and tail of the output channel, and the two rubber gaskets are slidingly installed on the second movement channel, and the opening at the other end of the placement tube is threadedly connected to the shielding piece, the outer box is fixedly connected to the assembly piece, the assembly piece is fixedly connected to the electric push rod, the placement tube is fixedly connected to the fixing seat, and the telescopic end of the electric push rod is fixedly connected to the tail of the fixing seat.

[0008] Furthermore, the outer box is fixedly connected to an assembly rod, the top of the assembly rod is fixedly connected to a rod body 1, the rod body 1 is slidably connected to the movement channel 1, a through-hole 3 is reserved on the rod body 1, the through-hole 3 is located above the area where the rod body 1 and the movement channel 1 are slidably connected, a rubber gasket 3 is fixedly connected to the movement channel 1, the rubber gasket 3 is slidably connected to the rod body 1, and the through-hole 3 is located inside the rubber gasket 3.

[0009] Furthermore, the end of the placement cylinder farther from the shielding plate is slidingly connected to the two compression shafts, one end of the compression shaft is fixedly connected to the sliding plate, two movement cavities are reserved on the fixed connection seat, one end of the sliding plate is slidingly connected to the inside of the adapted movement cavity, the inside of the movement cavity is fixedly connected to the rod body 2, the rod body 2 is slidingly connected to the adapted sliding plate, a spiral beryllium copper wire 1 is installed on the rod body 2, and the spiral beryllium copper wire 1 is fixedly connected between the adapted sliding plate and the end of the movement cavity farther from the shielding plate.

[0010] Furthermore, two constraint openings are reserved on the upper wall of the rotating table, a L-shaped piece is fixedly connected to the fixed seat, a rotating shaft is fixedly connected to the L-shaped piece, and the tail of the rotating shaft passes through the top of the outer box and extends into the inside of the outer box and is located in the adapted constraint opening.

[0011] Furthermore, a rotating shaft 2 is installed inside the exposed opening, and a second L-shaped piece is fixedly connected to the top of the rotating shaft 2. Two constraint rods are slidably connected to the second L-shaped piece. The constraint rods are fixedly connected to the top of the outer box. Two spiral beryllium copper wires are installed on the constraint rods. The two spiral beryllium copper wires are fixedly connected between the second L-shaped piece and the top of the matching constraint rod. Two constraint openings 2 are reserved on the top of the rotating platform, and the tail of the rotating shaft 2 is located in the matching constraint opening 2.

[0012] Furthermore, the constraint support unit includes two rotating truncated cones, which are respectively screwed to the tails in the two placement openings. The tops of the rotating truncated cones are fixedly connected to constraint seats. The tails of the net tube are reserved with embedding openings, and the constraint seats are respectively located in the corresponding embedding openings. The rotating truncated cones are connected to the power rotating unit.

[0013] Furthermore, the power rotating unit includes a displacement ring, which is fixedly connected to the tail inside the outer box. A ring-shaped cavity is reserved on the displacement ring. The ring-shaped cavity is located at the tail of the connecting area between the input channel and the outer box. A filling rod is installed inside the ring-shaped cavity. The two rotating cones are respectively slidably connected to the displacement ring and the filling rod. The tail of the filling rod is fixedly connected to cone one. An adapter is reserved at the tail of the outer box. The cone one is screwed inside the adapter. The tail of the outer box is fixedly connected to the motor, and the power end of the motor is fixedly connected to the tail of cone one.

[0014] Furthermore, a circular opening is reserved on the side of the rotating table, and two displacement openings are reserved on the side of the rotating table. The displacement opening is connected to the matching placement opening, and the inside of the displacement opening is slidably connected to the support table. One end of the support table extends into the inside of the placement opening and is fixedly connected to the support ring. The support ring is in the circular opening.

[0015] Furthermore, one end of the support platform extends to the side of the rotating platform, and a circular accommodating cavity is reserved inside the outer box.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention disconnects the input channel from the output channel and the placement cylinder through the purification switching unit, and reconnects the input channel with the output channel and the replaced net cylinder to perform the purification function, thereby allowing the laboratory ventilation to be renewed during operation, ensuring normal operation during the renewal period, and reducing interference with laboratory operation during the renewal period.

[0018] 2. According to the present invention, after the input port and the output port are fully moved into the input channel and the output channel respectively, the through hole 1 and the through hole 2 are respectively sealed inside the rubber gasket 1 and the rubber gasket 2 at the upper part. The input channel and the output channel are connected with the placement cylinder due to the movement channel 1 and the movement channel 2, and the gas is purified through the replacement mesh cylinder 2 inside the placement cylinder, thereby achieving the exchange of the purification space.

[0019] 3. The present invention allows the input port and the output port to be displaced toward the inside of the input channel and the output channel respectively to be connected. The moving channel 1 is displaced toward a higher position along the sliding connection area of ​​the rod body 1, thereby allowing the moving channel 1 to be connected with the through-port 3 on the rod body 1, releasing the connection constraint between the moving channel 1 and the placement cylinder and realizing the connection. The rod body 1 is slidably blocked by the rubber gasket 3, thereby ensuring the sealing ability during the connection between the through-port 3 and the inside of the moving channel 1.

[0020] 4. In the present invention, when replacing the second replacement net tube, the shielding sheet is separated by rotating, and the second replacement net tube is released without the constraint of the shielding sheet, and the spiral beryllium copper wire is reset to allow one end of the compression shaft to compress the second replacement net tube, thereby allowing the second replacement net tube to protrude along the opening of the placement tube, which is convenient for the operator to replace the second replacement net tube inside the placement tube.

[0021] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0024] Figure 2 For the embodiment of the present invention Figure 1 Schematic diagram of the structure at V;

[0025] Figure 3 For the embodiment of the present invention Figure 1 The structural diagram at W is shown in FIG.

[0026] Figure 4 A schematic cross-sectional view of a structure of an embodiment of the present invention;

[0027] Figure 5 For the embodiment of the present invention Figure 4 Schematic diagram of the structure at X;

[0028] Figure 6 For the embodiment of the present invention Figure 4 Schematic diagram of the Y structure;

[0029] Figure 7 This is a schematic diagram of the second cross-section structure of an embodiment of the present invention;

[0030] Figure 8 For the embodiment of the present invention Figure 7 Schematic diagram of the structure at Z;

[0031] Figure 9 This is a structural diagram of the outer box, rotating table and net cylinder according to an embodiment of the present invention;

[0032] Figure 10 For the embodiment of the present invention Figure 9 Schematic diagram of the structure at K;

[0033] Figure 11 This is a schematic structural diagram of a displacement ring and a filling rod according to an embodiment of the present invention;

[0034] Figure 12 Schematic diagram of the structure of the net drum 1 and the rotating truncated cone according to an embodiment of the present invention;

[0035] Figure 13 This is a structural diagram of a net tube 1, a filling rod, and a support ring according to an embodiment of the present invention;

[0036] Figure 14 This is a schematic diagram of the structure inside the reaction box of an embodiment of the present invention;

[0037] Figure numerals: 11, feeding channel; 111, reaction box; 112, external feeding channel; 113, replacement channel; 12, outer box; 13, exposure port; 14, rotating table; 15, placement port; 16, net cylinder 1; 17, input channel; 18, output channel; 19, connecting hole; 120, placement cylinder; 121, substitute net cylinder 2; 122, movement channel 1; 123, movement channel 2; 124, through hole 1; 125, input port; 126, rubber gasket 1; 127, through hole 2; 128, output port; 129, rubber gasket 2; 130, shielding piece; 131, assembly piece; 132, electric push rod; 133, fixed seat; 134, assembly rod; 135, rod body 1; 136, through port 3; 137. Rubber gasket 3; 138. Compression shaft; 139. Sliding plate; 140. Movement cavity; 141. Rod body 2; 142. Spiral beryllium copper wire 1; 143. Constraint opening 1; 144. L-shaped plate 1; 145. Rotating shaft 1; 146. Rotating shaft 2; 147. L-shaped plate 2; 148. Constraint rod; 149. Spiral beryllium copper wire 2; 150. Constraint opening 2; 151. Rotating cone; 152. Constraint seat; 153. Embedding opening; 154. Displacement ring; 155. Annular cavity; 156. Filling rod; 157. Cone 1; 158. Adapter opening; 159. Motor; 160. Annular opening; 161. Displacement opening; 162. Support platform; 163. Annular accommodating cavity; 164. Support ring. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Reference Figure 1-14The embodiment of the present invention proposes a ventilation system for gas purification for laboratory ventilation, comprising an outer box 12, with an exposure port 13 reserved on the side of the outer box 12, a rotating table 14 being screwed to the inside of the outer box 12, two placement ports 15 being reserved on the wall of the rotating table 14, a mesh tube 16 being installed inside the placement ports 15, and a constraint support unit being connected inside the placement ports 15; an input channel 17 is fixedly connected to the top of the outer box 12, and the input channel 17 is located above the adapted placement port 15; an output channel 18 is fixedly connected to the side of the outer box 12 farther from the exposure port 13, and one end of the output channel 18 is fixedly connected to the feed channel 11, and the feed channel 11 is connected to the reaction box 111 and extends into the reaction box 111, and the reaction An outgoing channel 112 is arranged on one side of the box 111, a replacement channel 113 is arranged on the lower part of one side of the reaction box 111, a valve is arranged on the replacement channel 113, a reagent is arranged in the reaction box 111, two connecting holes 19 are reserved on the wall of the rotating table 14, and the connecting holes 19 are connected to the matching placement port 15 respectively. One end of the output channel 18 is connected to the matching connecting hole 19, a placement cylinder 120 is arranged between the input channel 17 and the output channel 18, and a replacement mesh cylinder 121 is arranged inside the placement cylinder 120. The mesh cylinder can be used to separate the laboratory gas and filter out the particulate impurities in the gas. The placement cylinder 120 is connected to the purification switching unit; during use, the input channel 17 and the laboratory The ventilation channels are connected, and the laboratory gas moves along the connecting hole 19 to the inside of the outer box 12, and moves along the placement port 15 inside the outer box 12 to the matching mesh tube 16. The gas is purified through the mesh tube 16 and leaks from the side of the mesh tube 16, and moves into the output channel 18 along the matching connecting hole 19, thereby purifying the gas. During the period when the purification capacity of the mesh tube 16 inside the outer box 12 is weakened and needs to be replaced, the input channel 17 is connected to the output channel 18 and the placement tube 120 through the purification switching unit, and the gas purification is performed through the replacement mesh tube 2 121 inside the placement tube 120. Because the input channel 17 is connected to the output channel 18 and the placement tube 120, The input channel 17 is disconnected from the output channel 18 and the corresponding net tube 16, thereby achieving the change of the purification space, and after the purification space is changed, the positions of the two placement ports 15 are exchanged through the rotation of the rotating table 14, thereby replacing the net tube 16 and replacing the old net tube 16 through the exposure port 13. During the replacement of the net tube 16, the input channel 17 is disconnected from the output channel 18 and the placement tube 120 due to the purification switching unit, and the input channel 17 is reconnected with the output channel 18 and the replaced net tube 16 to perform the purification function, thereby allowing the laboratory ventilation to be renewed during operation, ensuring normal operation during the renewal period, and reducing interference with the laboratory operation during the renewal period.

[0040] The purification switching unit includes a motion channel 122 and a motion channel 2 123. The motion channel 122 is fixedly connected to one end of the placement cylinder 120. The motion channel 122 is slidably connected to the input channel 17. A through hole 124 is reserved on the motion channel 122. The through hole 124 is located inside the input channel 17. An input port 125 is reserved on one side of the opening of the motion channel 122 closer to the input channel (17). The input port 125 is located at the tail of the input channel 17. The upper part and the tail of the input channel 17 are fixedly connected to a rubber gasket 126. The rubber gasket 126 is slidably installed on the motion channel 122. The motion channel 2 123 is fixedly connected to the tail of the placement cylinder 120. The second moving channel 123 is slidably mounted on the output channel 18. A second through hole 127 is reserved on the second moving channel 123. The second through hole 127 is located inside the output channel 18. An output port 128 is reserved on the side of the second moving channel 123 closer to the opening of the output channel 18. The output port 128 is located at the tail of the output channel 18. Both sides of the upper tail of the output channel 18 are fixedly connected with a second rubber gasket 129. The second rubber gasket 129 is slidably mounted on the second moving channel 123. The opening at the other end of the placement tube 120 is connected to a shielding piece 130. The outer box 12 is fixedly connected with an assembly piece 131. The assembly piece 131 is fixedly connected with an electric push rod 132. The placement tube 120 is fixedly connected with a fixed seat 133. The electric push rod The telescopic end of 132 is fixedly connected to the tail of the fixed seat 133; during use, the opening of the placement cylinder 120 is blocked by the shielding piece 130 to prevent the overflow of gas, and the connection between the input channel 17 and the input channel 18 is ensured through the through hole 124 and the through hole 2 127. The connection between the input channel 17 and the output channel 18 and the net cylinder 16 is ensured and the gas is purified. The telescopic end of the electric push rod 132 is moved upward to pull the placement cylinder 120 to rise, thereby allowing the moving channel 1 122 and the moving channel 2 123 to move upward along the sliding connection between the input channel 17 and the output channel 18, thereby allowing the through hole 124 and the through hole 2 127 to move upward along the input channel 17 and the output channel The sliding connection of 18 is displaced upward and slowly disconnected from the mesh tube 16, and the input port 125 and the output port 128 are respectively displaced toward the inside of the input channel 17 and the output channel 18 and connected. After the input port 125 and the output port 128 are respectively completely displaced to the inside of the input channel 17 and the output channel 18, the through hole 124 and the through hole 2 127 are respectively sealed inside the rubber gasket 126 and the rubber gasket 2 129 at the top. The input channel 17 and the output channel 18 are connected to the placement tube 120 due to the movement channel 122 and the movement channel 2 123, and the gas is purified through the replacement mesh tube 2 121 inside the placement tube 120, thereby achieving the replacement of the purification space.

[0041] The outer box 12 is fixedly connected to the assembly rod 134. The assembly rod 134 is fixedly connected to the rod body 135. The rod body 135 is slidably connected to the movement channel 122. The rod body 135 is provided with a third through-hole 136. The third through-hole 136 is located above the area where the rod body 135 and the movement channel 122 are slidably connected. The movement channel 122 is fixedly connected to the rubber gasket 3 137. The rubber gasket 3 137 is slidably connected to the rod body 135. , through the third port 136 is located inside the third rubber gasket 137; during use, when the through hole 124 and the through hole 2 127 are connected to the inside of the input channel 17 and the output channel 18 respectively, the moving channel 122 is slidably engaged through the rod 135 to block the inside of the moving channel 122, so that the input channel 17, the output channel 18 and the net tube 16 are connected, and the connection between the placement tube 120 and the input channel 17 is restricted. This reduces the usage time and usage probability of the substitute net tube 2 121. During the purification switching and purification execution through the substitute net tube 2 121, the purification capacity of the substitute net tube 2 121 is ensured. When the movement channel 1 122 and the movement channel 2 123 are respectively displaced upward along the sliding connection area of ​​the input channel 17 and the output channel 18, and the input port 125 and the output port 128 are respectively displaced toward the inside of the input channel 17 and the output channel 18 to execute the connection, the movement channel 1 122 is displaced upward along the sliding connection area of ​​the rod body 135, thereby connecting the movement channel 1 122 with the through port 3 136 on the rod body 135, releasing the connection constraint between the movement channel 1 122 and the placement tube 120 and executing the connection. The rod body 1 135 is slidably blocked by the rubber gasket 3 137, thereby ensuring the sealing ability of the through port 3 136 during the connection with the inside of the movement channel 1 122.

[0042] The end of the placement cylinder 120 farther from the shielding piece 130 is slidably connected to two compression shafts 138, one end of the compression shaft 138 is fixedly connected to the sliding piece 139, and two movement cavities 140 are reserved on the fixed seat 133. One end of the sliding piece 139 is slidably connected to the inside of the adapted movement cavity 140, and the inside of the movement cavity 140 is fixedly connected to the rod body 2 141, and the rod body 2 141 is slidably connected to the adapted sliding piece 139. A spiral beryllium copper wire 142 is installed on the rod body 2 141, and the spiral beryllium copper wire 142 is fixedly connected between the adapted sliding piece 139 and the end of the movement cavity 140 farther from the shielding piece 130; during use, the substitute net cylinder 2 121 is placed inside the placement cylinder 120 and the opening of the placement cylinder 120 is blocked through the shielding piece 130, and one end of the shielding piece 130 drives the substitute net cylinder 2 The mesh tube 2 121 moves into the inside of the placement tube 120, and one end of the replacement mesh tube 2 121 fits and presses against one end of the two compression shafts 138, thereby allowing the compression shaft 138 to move along the sliding connection area of ​​the placement tube 120, and move along the inside of the motion cavity 140 through one end of the sliding plate 139, and the spiral beryllium copper wire 142 on the compression rod 2 141 is tightened and shortened. During the replacement of the replacement mesh tube 2 121, the shielding plate 130 is separated by rotating, and the replacement mesh tube 2 121 is released without the constraint of the shielding plate 130, and the spiral beryllium copper wire 142 is reset to allow one end of the compression shaft 138 to press the replacement mesh tube 2 121, thereby allowing the replacement mesh tube 2 121 to protrude along the opening of the placement tube 120, which is convenient for the operator to replace the replacement mesh tube 2 121 in the placement tube 120.

[0043] The upper wall of the rotating platform 14 is reserved with two restraint openings 143, and the fixed seat 133 is fixedly connected to a L-shaped piece 144, and the L-shaped piece 144 is fixedly connected to a rotating shaft 145. The tail of the rotating shaft 145 passes through the top of the outer box 12 and extends to the inside of the outer box 12 and is located in the adapted restraint opening 143; during operation, the telescopic end of the electric push rod 132 moves upward to pull the placement cylinder 120 to move upward, so that the input channel 17 and the output channel 18 are in the movement channel 122 and the movement channel 2. Due to the reason of 123, it is connected with the placing cylinder 120, and the fixed seat 133 is pulled upward by the placing cylinder 120, thereby allowing the L-shaped piece 144 to pull the rotating shaft 145 toward the upward displacement and separate from the self-adaptive constraint mouth 143, thereby releasing the constraint of the rotating table 14 inside the outer box 12, allowing the rotating table 14 to rotate and replace the net cylinder 16 after the purification switch is completed, avoiding the operator's accidental action when the replacement net cylinder 2 121 is not running, and ensuring the execution of purification.

[0044] A rotating shaft 146 is installed inside the exposed opening 13. A second 147 is fixedly connected to the top of the rotating shaft 146. Two restraining rods 148 are slidably connected to the second 147. The restraining rods 148 are all fixed to the top of the outer box 12. A spiral beryllium copper wire 149 is installed on the restraining rod 148. The spiral beryllium copper wire 149 is fixedly connected between the second 147 and the top of the matching restraining rod 148. Two restraining openings 150 are reserved on the top of the rotating table 14. The tail of the rotating shaft 146 is located in the matching restraining opening 150. During operation, after the first 144 pulls the rotating shaft 146 toward a higher position and releases the rotation constraint of the rotating table 14, the operation The operator moves the upper portion of the L-shaped piece 147 so that the L-shaped piece 147 moves along the sliding connection area of ​​the restraint rod 148 and compresses the spiral beryllium copper wire 149 to be tightened, so that the tail of the rotating shaft 146 separates from the matching restraint opening 150, and then rotates the rotating table 14 and replaces the net tube 16. After the replacement, the L-shaped piece 147 is released and the rotating shaft 146 moves to another restraint opening 150 under the reset reason of the spiral beryllium copper wire 149 to restrain the rotating table 14 again, ensuring that the L-shaped piece 144 can accurately move to the matching restraint opening 143 while pulling the rotating shaft 145 back to its original position, thereby reducing the probability of the operator accidentally causing device failure.

[0045] The restraint support unit includes two rotating truncated cones 151, which are respectively screwed to the tail of the two placement ports 15. The top of the rotating truncated cones 151 is fixedly connected to the restraint seat 152. The tail of the net cylinder 16 is reserved with an embedding port 153. The restraint seat 152 is respectively located in the adapted embedding port 153. The rotating truncated cones 151 are connected to the power rotating unit. During use, the tail of the net cylinder 16 in the placement port 15 is supported and restrained by the rotating truncated cones 151, and the restraint seat 152 is fixed to the top of the rotating truncated cones 151. The restraining seat 152 constrains the embedding port 153 at the tail end of the net tube 16. When the net tube 16 is inside the outer box 12 and connected with the input channel 17 and the output channel 18, the net tube 16 in the connection stage is rotated through the power rotation unit, so that the side walls of the net tube 16 can be rotated close to the matching connecting hole 19 to perform gas purification. In this way, the remaining areas of the net tube 16 farther away from the connecting hole 19 can fully exert their capabilities, thereby improving the purification capability of the net tube 16.

[0046] The power rotation unit includes a displacement ring 154, which is fixed to the tail of the outer box 12. A circular cavity 155 is reserved on the displacement ring 154. The circular cavity 155 is located at the tail of the connecting area between the input channel 17 and the outer box 12. A filling rod 156 is installed inside the circular cavity 155. Two rotating cones 151 are respectively slidably connected to the displacement ring 154 and the filling rod 156. The tail of the filling rod 156 is fixed to cone 157. An adapter 158 is reserved at the tail of the outer box 12. Cone 157 is screwed into the inside of the adapter 158. The tail of the outer box 12 is fixed to the motor 159. The power end of the motor 159 is fixed to the tail of cone 157. During use, When the rotating table 151 is slidingly connected to the filling rod 156, the power shaft of the motor 159 rotates and pulls the table 157 to rotate inside the adapter port 158, and the table 157 pulls the filling rod 156 to rotate inside the annular cavity 155, and the constraint seat 152 constrains the embedding port 153, so that the adapted net tube 16 rotates together, and while the rotating table 14 rotates and the net tube 16 is replaced, the power end of the motor 159 pulls the adapted filling rod 156 to rotate to the initial position, thereby allowing the filling rod 156 and the displacement ring 154 to form a ring structure, so that the two rotating tables 151 can be displaced along the sliding connection area and realize the exchange of positions.

[0047] A circular opening 160 is reserved on the side of the rotating circular table 151, and two displacement openings 161 are reserved on the side of the rotating table 14. The displacement opening 161 is connected to the matching placement opening 15, and the inside of the displacement opening 161 is slidingly connected to the support platform 162. One end of the support platform 162 extends to the inside of the placement opening 15 and is fixedly connected to the support ring 164. The support ring 164 is in the circular opening 160; during use, it moves upward along the displacement opening 161, allowing one end of the support platform 162 to pull the support ring 164 from the circular opening 160 to move upward, thereby supporting the tail of the net tube 16 and lifting it upward, allowing the placement opening 15 to move upward along the matching placement opening 15, which is convenient for the operator to replace the net tube 16.

[0048] One end of the support platform 162 extends to the side of the rotating platform 14, and a circular accommodating cavity 163 is reserved inside the outer box 12. During use, the end of the support platform 162 protruding from the rotating platform 14 facilitates the operator to quickly move the support platform 162, and the circular accommodating cavity 163 reserved on the outer box 12 allows the support platform 162 to rotate with the rotating platform 14. The end of the support platform 162 protruding from the rotating platform 14 can be moved within the circular accommodating cavity 163 to ensure the rotation of the rotating platform 14.

[0049] The specific implementation method is as follows: during use, the input channel 17 is connected to the ventilation channel of the laboratory, and the laboratory gas moves along the connecting hole 19 to the inside of the outer box 12, and moves along the placement port 15 inside the outer box 12 to the adapted mesh tube 16, and the gas is purified through the mesh tube 16 and leaked from the side of the mesh tube 16, and moves into the output channel 18 along the adapted connecting hole 19, thereby purifying the particulate impurities in the gas, and then moves to the reaction box 111 through the feeding channel 11, and the rest of the gas is processed with chemical agents, and then sent out through the external delivery channel 112. The reagents in the reaction box 111 can be replaced through the replacement channel 113. When the purification capacity of the mesh tube 16 inside the outer box 12 is weakened and needs to be replaced, the input channel 17 is connected to the output channel 18 and the placement tube 120 through the purification switching unit. And gas purification is performed through the replacement mesh tube 2 121 inside the placement tube 120. Since the input channel 17 is connected with the output channel 18 and the placement tube 120, the input channel 17 is disconnected from the output channel 18 and the adapted mesh tube 16, thereby achieving a change in the purification space. After the purification space is changed, the positions of the two placement ports 15 are swapped by rotating the rotating table 14, thereby replacing the mesh tube 16 and replacing the old mesh tube 16 through the exposure port 13. During the replacement action of the mesh tube 16, the input channel 17 is disconnected from the output channel 18 and the placement tube 120 through the purification switching unit, and the input channel 17 is connected to the output channel 18 and the replaced mesh tube 16 again to perform the purification function, thereby allowing the laboratory ventilation to be renewed during operation, ensuring normal operation during the renewal period, and reducing interference with the laboratory operation during the renewal period.

[0050] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A ventilation system for gas purification for laboratory ventilation, comprising an outer box (12), characterized in that: The side of the outer box (12) is reserved with an exposure opening (13), the inner side of the outer box (12) is connected to a rotating platform (14), the wall surface of the rotating platform (14) is reserved with two placement openings (15), the inner sides of the placement openings (15) are both provided with a net cylinder (16), and the inner sides of the placement openings (15) are connected to a restraining support unit; The upper surface of the outer box (12) is fixedly connected to an input channel (17), and the input channel (17) is located at the upper portion of the adapted placement port (15). The side of the outer box (12) farther from the exposure port (13) is fixedly connected to an output channel (18). One end of the output channel (18) is fixedly connected to an input channel (11). The input channel (11) is connected to a reaction box (111) and extends into the reaction box (111). An output channel (112) is installed on one side of the reaction box (111). A lower portion of one side of the reaction box (111) is installed. A replacement channel (113) is provided with a valve. Two connecting holes (19) are reserved on the wall of the rotating platform (14). The connecting holes (19) are connected to the corresponding placement ports (15). One end of the output channel (18) is connected to the corresponding connecting holes (19). A placement cylinder (120) is provided between the input channel (17) and the output channel (18). A second replacement net cylinder (121) is provided inside the placement cylinder (120). The placement cylinder (120) is connected to a purification switching unit.

2. A ventilation system for gas purification for laboratory ventilation according to claim 1, characterized in that: The purification switching unit comprises a motion channel 1 (122) and a motion channel 2 (123), wherein the motion channel 1 (122) is fixedly connected to one end of the placement cylinder (120), and the motion channel 1 (122) is slidably connected to the input channel (17), and a through hole 1 (124) is reserved on the motion channel 1 (122), and the through hole 1 (124) is located inside the input channel (17). The motion channel 1 (122) is 1 / 4 of the distance from the input channel (17) to the input channel (17). 7) An input port (125) is reserved on one side of the opening closer to the input channel (17). The input port (125) is located at the tail of the input channel (17). The upper part and both sides of the tail of the input channel (17) are fixedly connected with a rubber gasket (126). The rubber gasket (126) is slidably mounted on the movement channel (122). The movement channel (123) is fixedly connected to the tail of the placement cylinder (120). The movement channel (123) is slidably mounted on the output channel (122). On the channel (18), the second movement channel (123) is reserved with a second through hole (127), the second through hole (127) is located inside the output channel (18), the second movement channel (123) is reserved with an output port (128) on the side closer to the opening of the output channel (18), the output port (128) is located at the tail of the output channel (18), and the upper tail of the output channel (18) is fixedly connected with a second rubber gasket (129) on both sides. The rubber gasket 2 (129) is slidably mounted on the movement channel 2 (123), the opening at the other end of the placement tube (120) is threadedly connected to the shielding piece (130), the outer box (12) is fixedly connected to the assembly piece (131), the assembly piece (131) is fixedly connected to the electric push rod (132), the placement tube (120) is fixedly connected to the fixed seat (133), and the telescopic end of the electric push rod (132) is fixedly connected to the tail of the fixed seat (133).

3. A ventilation system for gas purification for laboratory ventilation according to claim 2, characterized in that: The outer box (12) is fixedly connected to an assembly rod (134), and the upper part of the assembly rod (134) is fixedly connected to a rod body (135), and the rod body (135) is slidably connected to the motion channel (122). A third through-hole (136) is reserved on the rod body (135), and the third through-hole (136) is located above the sliding connection area between the rod body (135) and the motion channel (122). A third rubber gasket (137) is fixedly connected to the motion channel (122), and the third rubber gasket (137) is slidably connected to the rod body (135). The third through-hole (136) is located inside the third rubber gasket (137).

4. A ventilation system for gas purification for laboratory ventilation according to claim 2, characterized in that: The end of the placing cylinder (120) farther from the shielding plate (130) is slidably connected to two compression shafts (138), one end of the compression shaft (138) is fixedly connected to the sliding plate (139), two movement cavities (140) are reserved on the fixed seat (133), one end of each sliding plate (139) is slidably connected to the inside of the adapted movement cavity (140), the inside of the movement cavity (140) is fixedly connected to the second rod body (141), the second rod body (141) is slidably connected to the adapted sliding plate (139), a spiral beryllium copper wire (142) is arranged on the second rod body (141), and the spiral beryllium copper wire (142) is fixedly connected between the adapted sliding plate (139) and the end of the movement cavity (140) farther from the shielding plate (130).

5. A ventilation system for gas purification for laboratory ventilation according to claim 2, characterized in that: Two restraining openings (143) are reserved on the upper wall of the rotating platform (14), a L-shaped piece (144) is fixedly connected to the fixed seat (133), and a rotating shaft (145) is fixedly connected to the L-shaped piece (144). The tail of the rotating shaft (145) passes through the top of the outer box (12) and extends into the inner part of the outer box (12) and is located in the adapted restraining opening (143).

6. A ventilation system for gas purification for laboratory ventilation according to claim 5, characterized in that: A second rotating shaft (146) is arranged inside the exposed opening (13), a second elliptical sheet (147) is fixedly connected to the top of the second rotating shaft (146), two restraining rods (148) are slidably connected to the second elliptical sheet (147), and the restraining rods (148) are fixedly connected to the top of the outer box (12). Two spiral beryllium copper wires (149) are arranged on the restraining rods (148), and the two spiral beryllium copper wires (149) are fixedly connected between the second elliptical sheet (147) and the top of the matching restraining rods (148). Two restraining openings (150) are reserved on the top of the rotating platform (14), and the tail of the second rotating shaft (146) is located in the matching restraining opening (150).

7. A ventilation system for gas purification for laboratory ventilation according to claim 1, characterized in that: The constraint support unit comprises two rotating truncated cones (151), each of the two rotating truncated cones (151) is screwed to the tail of the two placement openings (15), the top of each rotating truncated cone (151) is fixedly connected to a constraint seat (152), the tail of each mesh cylinder (16) is reserved with an embedding opening (153), the constraint seat (152) is respectively located in the adapted embedding opening (153), and the rotating truncated cone (151) is connected to a power rotating unit.

8. A ventilation system for gas purification for laboratory ventilation according to claim 7, characterized in that: The power rotating unit comprises a displacement ring (154), the displacement ring (154) is fixedly connected to the tail of the outer box (12), a ring-shaped cavity (155) is reserved on the displacement ring (154), the ring-shaped cavity (155) is located at the tail of the connecting area between the input channel (17) and the outer box (12), a filling rod (156) is installed inside the ring-shaped cavity (155), and the two rotating truncated cones (151) are respectively slidable. The displacement ring (154) and the filling rod (156) are connected to each other. The tail of the filling rod (156) is fixedly connected to the truncated cone (157). The tail of the outer box (12) is provided with an adapter (158). The truncated cone (157) is screwed into the adapter (158). The tail of the outer box (12) is fixedly connected to the motor (159). The power end of the motor (159) is fixedly connected to the tail of the truncated cone (157).

9. A ventilation system for gas purification for laboratory ventilation according to claim 7, characterized in that: A circular opening (160) is reserved on the side of the rotating circular table (151), and two displacement openings (161) are reserved on the side of the rotating table (14). The displacement openings (161) are connected to the matching placement opening (15). The inside of the displacement opening (161) is slidably connected to the support table (162). One end of the support table (162) extends into the inside of the placement opening (15) and is fixedly connected to the support ring (164). The support ring (164) is located in the circular opening (160).

10. A ventilation system for gas purification for laboratory ventilation according to claim 9, characterized in that: One end of the support platform (162) extends to the side of the rotating platform (14), and a circular accommodating cavity (163) is reserved inside the outer box (12).

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