Laboratory waste gas purification ventilation cabinet

Abstract

The utility model relates to the technical field of laboratory fume cupboards, in particular to a laboratory waste gas purification fume cupboard which comprises a cupboard body, a shell is installed on the outer wall of the cupboard body, a sealing plate assembly is installed on the inner wall of the cupboard body in a sliding mode, and a waste gas purification assembly and a transmission assembly are installed on the top of the cupboard body. And an insertion block and a fixing assembly are mounted on the outer wall of the waste gas purification assembly. The sealing plate assembly comprises a frame body which is installed on the inner wall of the cabinet body in a sliding mode, and racks are installed on the two sides of the frame body. According to the improved fume hood, the sealing plate assembly and the transmission assembly are adopted, when the fume hood is used, the sealing plate assembly on the fume hood can be automatically opened and closed, and the using convenience of the fume hood is improved; and an inserting block and a fixing assembly are adopted, when the ventilation cabinet is used, a cover plate can be rapidly opened or closed, a filter screen and an activated carbon adsorption plate can be conveniently and rapidly replaced, and the use convenience of the ventilation cabinet is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory fume hoods, in particular to a laboratory waste gas purification fume hood. Background Art

[0002] Laboratory fume hoods are a type of equipment specifically designed to protect experimental personnel and the environment. They are commonly used in chemical, biological, and physical laboratories to ensure the safety and effectiveness of experimental operations.

[0003] Laboratory fume hoods are mainly composed of a cabinet body, an operating table, and a ventilation system (including fans, air ducts, and other components). The cabinet body is usually made of different materials, such as all-steel, steel-wood, etc. The operating table has various types such as acid and alkali resistance and high temperature resistance to meet different experimental needs.

[0004] In the process of realizing the present invention, the inventors found that the prior art had the following problems: 1. When using an existing ordinary laboratory fume hood, it is generally necessary to manually open and close the glass cover, which is time-consuming and labor-intensive; 2. The air filter part of an existing ordinary laboratory fume hood is generally installed by screws, which makes it inconvenient to replace the filter screen and activated carbon adsorption plate of the filter part, resulting in a time-consuming and labor-intensive use. Utility Model Content

[0005] The purpose of this utility model is to provide a laboratory exhaust gas purification fume hood to solve the problems raised in the above-mentioned background technology. To achieve the above-mentioned purpose, the utility model provides the following technical solution: a laboratory exhaust gas purification fume hood, comprising a cabinet body, a shell mounted on the outer wall of the cabinet body, a sealing plate assembly slidably mounted on the inner wall of the cabinet body, an exhaust gas purification assembly and a transmission assembly mounted on the top of the cabinet body, and an insert and a fixing assembly mounted on the outer wall of the exhaust gas purification assembly.

[0006] The sealing plate assembly comprises a frame body which is slidably mounted on the inner wall of the cabinet body, and racks are mounted on both sides of the frame body.

[0007] The exhaust gas purification assembly includes an exhaust fan and a purification box installed on the top of the cabinet, a connecting pipe is installed on one side of the purification box, an exhaust hood is installed on the bottom of the connecting pipe, a cover is installed on the top of the purification box, and a first installation frame and a second installation frame are installed on the inner wall of the purification box in sequence from left to right.

[0008] The transmission assembly includes a reduction motor and a first mounting block installed on the top of the cabinet, a second mounting block and a third mounting block are installed on both sides of the cabinet, a worm is installed on the output end of the reduction motor, the front end of the third mounting block is penetrated by a first connecting rod and rotatably installed, the front end of the first connecting rod is installed with a spur gear, the rear end of the first connecting rod is installed with a first bevel gear, the top of the second mounting block is penetrated by a second connecting rod and rotatably installed, the bottom of the second connecting rod is installed with a second bevel gear, the top of the second connecting rod is installed with a third bevel gear, a fourth connecting rod is penetrated by a side of the first mounting block and rotatably installed, fourth bevel gears are installed at both ends of the fourth connecting rod, and a worm gear is installed in the middle of the outer wall of the fourth connecting rod.

[0009] The fixing assembly includes a fixing shell installed on both sides of the cover plate, a U-shaped frame is installed on one side of the fixing shell, an insertion rod is slidably installed on one side of the U-shaped frame, a pull rod is installed on one side of the insertion rod, a limit block is installed on the outer wall of the insertion rod, and a spring is installed on one side of the limit block.

[0010] Further preferably, the inner wall of the frame is provided with protective glass, and the inner wall of the cabinet is provided with a slide groove whose internal dimension structure is consistent with the external dimension structure of the frame, and movable grooves whose internal dimension structure is consistent with the external dimension structure of the rack are provided on both sides of the inner wall of the slide groove.

[0011] Further preferably, the spur gear is meshed with the rack, the first bevel gear is meshed with the second bevel gear, the third bevel gear is meshed with the fourth bevel gear, the worm is meshed with the worm wheel, and the first mounting block, the second mounting block, the third mounting block, the first connecting rod, the spur gear, the first bevel gear, the second connecting rod, the second bevel gear, the third bevel gear and the fourth bevel gear are symmetrically distributed about the vertical center line of the fourth connecting rod.

[0012] Further preferably, the exhaust fan is connected to the purification box through a pipe, the external dimension structure of the first installation frame is consistent with that of the second installation frame, the inner wall of the purification box is provided with a plurality of evenly and equidistantly distributed slide grooves whose internal dimension structure is consistent with the external dimension structure of the first installation frame, the inner wall of the first installation frame is provided with a filter net, and the inner wall of the second installation frame is provided with an activated carbon adsorption plate.

[0013] Further preferably, a sealing ring is provided at the bottom of the cover plate, and the cover plate forms a sealing structure with the purification box through the sealing ring.

[0014] Further preferably, the plug blocks are installed on both sides of the purification box, and one side of the fixed shell and the plug block are provided with rectangular holes whose internal size structure is consistent with the external size structure of the plug rod, and one end of the spring is connected to the inner wall of the U-shaped frame.

[0015] Further preferably, the internal dimension structure of the fixing shell is consistent with the external dimension structure of the inserting block, and the top of the inserting block and the bottom of the inserting rod are both provided with inclined surfaces.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the utility model, through the sealing plate assembly and the transmission assembly, when the fume hood is used, the reduction motor is started, and the reduction motor drives the spur gear to rotate through the worm, the worm wheel, the fourth connecting rod, the fourth bevel gear, the third bevel gear, the second connecting rod, the second bevel gear, the first bevel gear and the first connecting rod. When the spur gear rotates, the frame is driven up and down through the rack, which can automatically open and close the sealing plate assembly on the fume hood, thereby improving the convenience of using the fume hood.

[0018] In the present invention, through the plug block and the fixed assembly, when the fume hood is in use and the filter and the activated carbon adsorption plate need to be replaced, the pull rod is pulled to draw the plug rod out of the rectangular hole on the plug block, and then the cover plate is moved upward to separate the cover plate from the purification box, and then the filter and the activated carbon adsorption plate in the purification box are replaced, and then the cover plate is closed with the purification box, and the plug block is inserted into the fixed shell, and the plug rod is squeezed to one side by the plug block, and when the position of the plug rod coincides with the rectangular hole on the plug block, the plug rod is inserted into the rectangular hole on the plug block by the elastic force of the spring, and the cover plate is installed with the purification box, and the cover plate can be quickly opened or closed, which is convenient for quickly replacing the filter and the activated carbon adsorption plate, thereby improving the convenience of using the fume hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the full cross-section structure of the utility model;

[0021] Figure 3 For this utility model Figure 1 A in the figure shows the enlarged structural diagram;

[0022] Figure 4 For this utility model Figure 1 A schematic diagram of the structure at point B is enlarged;

[0023] Figure 5 This is a schematic diagram of the structure of the sealing plate assembly of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the exhaust gas purification component of the utility model;

[0025] Figure 7 This is a schematic diagram of the full cross-section structure of the exhaust gas purification component of the utility model;

[0026] Figure 8 This is a schematic diagram of the transmission assembly structure of the utility model;

[0027] Figure 9 For the utility model Figure 8 The enlarged structural diagram at C in FIG.

[0028] Figure 10 This is a schematic diagram of the enlarged structure of the plug-in block of the utility model;

[0029] Figure 11 This is a schematic diagram of the full cross-section structure of the fixing component of the utility model.

[0030] Figure: 1, cabinet; 2, shell; 3, sealing plate assembly; 301, frame; 302, rack; 4, exhaust gas purification assembly; 401, exhaust fan; 402, purification box; 403, connecting pipe; 404, exhaust hood; 405, cover; 406, first installation frame; 407, second installation frame; 5, transmission assembly; 501, reduction motor; 502, first installation block; 503, second installation block; 504, third installation block; 505, worm Rod; 506, first connecting rod; 507, spur gear; 508, first bevel gear; 509, second connecting rod; 5010, second bevel gear; 5011, third bevel gear; 5012, fourth connecting rod; 5013, fourth bevel gear; 5014, worm gear; 6, plug block; 7, fixing assembly; 701, fixing shell; 702, U-shaped frame; 703, plug rod; 704, pull rod; 705, limit block; 706, spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figures 1 to 11 The utility model provides a technical solution: a laboratory exhaust gas purification fume hood, comprising a cabinet body 1, a shell 2 is installed on the outer wall of the cabinet body 1, a sealing plate assembly 3 is slidably installed on the inner wall of the cabinet body 1, an exhaust gas purification assembly 4 and a transmission assembly 5 are installed on the top of the cabinet body 1, and an insert 6 and a fixing assembly 7 are installed on the outer wall of the exhaust gas purification assembly 4.

[0033] The sealing plate assembly 3 includes a frame 301 slidably mounted on the inner wall of the cabinet 1 , and racks 302 are mounted on both sides of the frame 301 .

[0034] The exhaust gas purification component 4 includes an exhaust fan 401 and a purification box 402 installed on the top of the cabinet 1. A connecting pipe 403 is installed on one side of the purification box 402, an exhaust hood 404 is installed on the bottom of the connecting pipe 403, a cover 405 is installed on the top of the purification box 402, and a first installation frame 406 and a second installation frame 407 are installed on the inner wall of the purification box 402 in sequence by sliding from left to right.

[0035] The transmission assembly 5 includes a reduction motor 501 and a first mounting block 502 installed on the top of the cabinet 1, and a second mounting block 503 and a third mounting block 504 are installed on both sides of the cabinet 1. A worm 505 is installed at the output end of the reduction motor 501, and a first connecting rod 506 is rotatably installed on the front end of the third mounting block 504. A spur gear 507 is installed at the front end of the first connecting rod 506, and a first bevel gear 508 is installed at the rear end of the first connecting rod 506. A second connecting rod 509 is rotatably installed on the top of the second mounting block 503, a second bevel gear 5010 is installed at the bottom of the second connecting rod 509, and a third bevel gear 5011 is installed on the top of the second connecting rod 509. A fourth connecting rod 5012 is rotatably installed on one side of the first mounting block 502, and fourth bevel gears 5013 are installed at both ends of the fourth connecting rod 5012. A worm gear 5014 is installed in the middle of the outer wall of the fourth connecting rod 5012.

[0036] The fixing assembly 7 includes a fixing shell 701 installed on both sides of the cover plate 405, a U-shaped frame 702 is installed on one side of the fixing shell 701, an insertion rod 703 is slidably installed through one side of the U-shaped frame 702, a pull rod 704 is installed on one side of the insertion rod 703, a limit block 705 is installed on the outer wall of the insertion rod 703, and a spring 706 is installed on one side of the limit block 705.

[0037] In this embodiment, Figure 3 and Figure 5 As shown, the inner wall of the frame 301 is provided with a protective glass, and the inner wall of the cabinet 1 is provided with a slide groove whose internal dimension structure is consistent with the external dimension structure of the frame 301, and both sides of the inner wall of the slide groove are provided with a movable groove whose internal dimension structure is consistent with the external dimension structure of the rack 302; the frame 301 can stably move up and down in the slide groove on the inner wall of the cabinet 1, thereby improving the stability of the fume hood when in use.

[0038] In this embodiment, Figure 5 、 Figure 8 and Figure 9As shown, the spur gear 507 is meshed with the rack 302, the first bevel gear 508 is meshed with the second bevel gear 5010, the third bevel gear 5011 is meshed with the fourth bevel gear 5013, the worm 505 is meshed with the worm wheel 5014, and the first mounting block 502, the second mounting block 503, the third mounting block 504, the first connecting rod 506, the spur gear 507, the first bevel gear 508, the second connecting rod 509, the second bevel gear 5010, the third bevel gear 5011 and the fourth bevel gear 5013 are symmetrically distributed about the vertical center line of the fourth connecting rod 5012; when the deceleration When the motor 501 is started, the worm gear 5014 is driven to rotate through the worm 505. When the worm gear 5014 rotates, it drives the fourth connecting rod 5012 and the fourth bevel gear 5013 to rotate. When the fourth bevel gear 5013 rotates, it drives the second connecting rod 509 and the second bevel gear 5010 to rotate through the third bevel gear 5011. When the second bevel gear 5010 rotates, it drives the first connecting rod 506 and the spur gear 507 to rotate through the first bevel gear 508. When the spur gear 507 rotates, it drives the frame 301 to move up and down through the rack 302, which can automatically drive the sealing plate assembly 3 to move up and down, thereby improving the convenience of using the fume hood.

[0039] In this embodiment, Figure 6 and Figure 7 As shown, the exhaust fan 401 is connected to the purification box 402 through a pipeline, the external dimension structure of the first installation frame 406 is consistent with that of the second installation frame 407, and the inner wall of the purification box 402 is provided with a number of evenly and equidistantly distributed slide grooves whose internal dimension structure is consistent with the external dimension structure of the first installation frame 406, the inner wall of the first installation frame 406 is provided with a filter, and the inner wall of the second installation frame 407 is provided with an activated carbon adsorption plate; the filter on the first installation frame 406 can filter impurities in the air extracted by the exhaust fan 401, and the activated carbon adsorption plates in the second installation frame 407 adsorb harmful gases.

[0040] In this embodiment, Figure 6 and Figure 7 As shown, a sealing ring is provided at the bottom of the cover 405, and the cover 405 forms a sealing structure with the purification box 402 through the sealing ring; when the cover 405 and the purification box 402 are covered, the sealing ring can prevent the air extracted by the exhaust fan 401 from overflowing through the gap between the cover 405 and the purification box 402, affecting the purification effect.

[0041] In this embodiment, Figure 4 、 Figure 7 、 Figure 10 and Figure 11As shown, the plug block 6 is installed on both sides of the purification box 402, and a rectangular hole with an internal size structure consistent with the external size structure of the plug rod 703 is opened on one side of the fixed shell 701 and the plug block 6, and one end of the spring 706 is connected to the inner wall of the U-shaped frame 702; when the limit block 705 is subjected to the elastic force of the spring 706, the plug rod 703 is inserted into the rectangular hole on the plug block 6, which can improve the stability of the cover plate 405 after being covered with the purification box 402.

[0042] In this embodiment, Figure 10 and Figure 11 As shown, the internal size structure of the fixed shell 701 is consistent with the external size structure of the plug block 6, and the top of the plug block 6 and the bottom of the plug rod 703 are both provided with inclined surfaces; when the cover 405 is closed with the purification box 402, the plug block 6 is inserted into the fixed shell 701, and the inclined surface on the plug block 6 contacts the inclined surface on the plug rod 703, and the plug rod 703 is squeezed to one side by the plug block 6, and the spring 706 is compressed. When the position of the plug rod 703 coincides with the rectangular hole on the plug block 6, the plug rod 703 is inserted into the rectangular hole on the plug block 6 by the elastic force of the spring 706, and the cover 405 and the purification box 402 can be quickly installed, thereby improving the convenience of using the fume hood.

[0043] The use method and advantages of this utility model: When the laboratory exhaust gas purification fume hood is in use, the working process is as follows:

[0044] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11As shown, first start the reduction motor 501, and drive the worm gear 5014 to rotate through the worm 505. When the worm gear 5014 rotates, the spur gear 507 is driven to rotate through the fourth connecting rod 5012, the fourth bevel gear 5013, the third bevel gear 5011, the second connecting rod 509, the second bevel gear 5010, the first bevel gear 508 and the first connecting rod 506. When the spur gear 507 rotates, it drives the frame 301 to move upward through the rack 302, and the frame 301 is adjusted to a suitable height. Stop the reduction motor 501. When the fume hood is used, start the exhaust fan 401. The exhaust fan 401 draws air from the cabinet 1 through the purification box 402, the connecting pipe 403 and the exhaust hood 404. The air enters the purification box 402. The filter screen in the purification box 402 filters impurities in the air, and the activated carbon adsorption plate adsorbs harmful gases in the air. Then, the purified air is discharged. The air is discharged through the air outlet of the exhaust fan 401. When the filter and activated carbon adsorption plate in the purification box 402 need to be replaced, the pull rod 704 is pulled, and the insertion rod 703 is pulled out from the rectangular hole on the insertion block 6. Then the cover plate 405 is moved upward to separate the cover plate 405 from the purification box 402. Then the first installation frame 406 and the second installation frame 407 are pulled out from the purification box 402. Then the new first installation frame 406 with the filter installed and the second installation frame 407 with the activated carbon adsorption plate installed are inserted into the purification box 402. Then the cover plate 405 is closed with the purification box 402, and the insertion block 6 is inserted into the fixed shell 701. The insertion rod 703 is squeezed to one side by the insertion block 6. When the position of the insertion rod 703 coincides with the rectangular hole on the insertion block 6, the insertion rod 703 is inserted into the rectangular hole on the insertion block 6 by the elastic force of the spring 706, and the cover plate 405 is installed with the purification box 402.

[0045] The above shows and describes the basic principles, main features, and advantages of the present invention. Persons skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements 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 laboratory exhaust gas purification fume hood, comprising a cabinet body (1), characterized in that: The outer wall of the cabinet (1) is mounted with a housing (2), the inner wall of the cabinet (1) is slidably mounted with a sealing plate assembly (3), the top of the cabinet (1) is mounted with an exhaust gas purification assembly (4) and a transmission assembly (5), and the outer wall of the exhaust gas purification assembly (4) is mounted with an insert (6) and a fixing assembly (7); The sealing plate assembly (3) comprises a frame (301) slidably mounted on the inner wall of the cabinet (1), and racks (302) are mounted on both sides of the frame (301); The exhaust gas purification assembly (4) comprises an exhaust fan (401) and a purification box (402) installed on the top of the cabinet (1); a connecting pipe (403) is installed on one side of the purification box (402); an exhaust hood (404) is installed on the bottom of the connecting pipe (403); a cover plate (405) is installed on the top of the purification box (402); and a first installation frame (406) and a second installation frame (407) are slidably installed on the inner wall of the purification box (402) from left to right in sequence; The transmission assembly (5) comprises a reduction motor (501) and a first mounting block (502) mounted on the top of the cabinet (1); a second mounting block (503) and a third mounting block (504) are mounted on both sides of the cabinet (1); a worm (505) is mounted on the output end of the reduction motor (501); a first connecting rod (506) is rotatably mounted through the front end of the third mounting block (504); a spur gear (507) is mounted on the front end of the first connecting rod (506); and a first bevel gear (508) is mounted on the rear end of the first connecting rod (506). ), a second connecting rod (509) is rotatably mounted on the top of the second mounting block (503), a second bevel gear (5010) is mounted on the bottom of the second connecting rod (509), a third bevel gear (5011) is mounted on the top of the second connecting rod (509), a fourth connecting rod (5012) is rotatably mounted on one side of the first mounting block (502), fourth bevel gears (5013) are mounted on both ends of the fourth connecting rod (5012), and a worm gear (5014) is mounted on the middle portion of the outer wall of the fourth connecting rod (5012); The fixing assembly (7) includes a fixing shell (701) installed on both sides of the cover plate (405), a U-shaped frame (702) is installed on one side of the fixing shell (701), an insertion rod (703) is slidably installed through one side of the U-shaped frame (702), a pull rod (704) is installed on one side of the insertion rod (703), a limit block (705) is installed on the outer wall of the insertion rod (703), and a spring (706) is installed on one side of the limit block (705).

2. A laboratory exhaust gas purification fume hood according to claim 1, characterized in that: The inner wall of the frame (301) is provided with a protective glass, and the inner wall of the cabinet (1) is provided with a slide groove whose internal dimension structure is consistent with the external dimension structure of the frame (301), and both sides of the inner wall of the slide groove are provided with a movable groove whose internal dimension structure is consistent with the external dimension structure of the rack (302).

3. A laboratory exhaust gas purification fume hood according to claim 1, characterized in that: The spur gear (507) is meshed and installed with the rack (302), the first bevel gear (508) is meshed and installed with the second bevel gear (5010), the third bevel gear (5011) is meshed and installed with the fourth bevel gear (5013), the worm (505) is meshed and installed with the worm wheel (5014), and the first mounting block (502), the second mounting block (503), the third mounting block (504), the first connecting rod (506), the spur gear (507), the first bevel gear (508), the second connecting rod (509), the second bevel gear (5010), the third bevel gear (5011) and the fourth bevel gear (5013) are symmetrically distributed about the vertical center line of the fourth connecting rod (5012).

4. A laboratory exhaust gas purification fume hood according to claim 1, characterized in that: The exhaust fan (401) is connected to the purification box (402) through a pipeline, the external dimension structure of the first installation frame (406) is consistent with that of the second installation frame (407), the inner wall of the purification box (402) is provided with a plurality of evenly and equidistantly distributed slide grooves whose internal dimension structure is consistent with the external dimension structure of the first installation frame (406), the inner wall of the first installation frame (406) is provided with a filter screen, and the inner wall of the second installation frame (407) is provided with an activated carbon adsorption plate.

5. The laboratory exhaust gas purification fume hood according to claim 1, characterized in that: A sealing ring is provided at the bottom of the cover plate (405), and the cover plate (405) forms a sealing structure with the purification box (402) through the sealing ring.

6. A laboratory exhaust gas purification fume hood according to claim 1, characterized in that: The insert (6) is installed on both sides of the purification box (402), and one side of the fixed shell (701) and the insert (6) is provided with a rectangular hole whose internal size structure is consistent with the external size structure of the insert rod (703), and one end of the spring (706) is connected to the inner wall of the U-shaped frame (702).

7. A laboratory exhaust gas purification fume hood according to claim 1, characterized in that: The internal dimension structure of the fixed shell (701) is consistent with the external dimension structure of the insert block (6), and the top of the insert block (6) and the bottom of the insert rod (703) are both provided with inclined surfaces.

Images