Waste gas collecting device for exhaust of experiment table

Abstract

The utility model relates to a waste gas collecting device for exhaust of an experiment table, which is arranged on an experiment table body. The waste gas exhaust collecting structure comprises an exhaust hood and a filter, a communicating pipe is arranged between the exhaust hood and the filter, and an air outlet of the filter is connected with a negative pressure pipe; a dust collection hose; a flow regulating structure; and a driving structure. According to the waste gas collecting device for exhaust of the experiment table, the exhaust hood and the dust collection hose are used for waste gas absorption and table top dust removal respectively, path switching can be achieved by designing the driving structure and the flow adjusting structure, and the purposes of effectively collecting waste gas and cleaning the surface of the experiment table body through the same negative pressure source are achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of laboratory bench auxiliary equipment, specifically a waste gas collection device for laboratory bench exhaust. Background Technology

[0002] In laboratory environments, especially in chemical and biological experiments where harmful gases are generated, it is crucial to ensure that exhaust gases are effectively collected and treated. Traditional exhaust gas collection methods mainly rely on side or top suction hoods installed on the lab bench to collect and control exhaust gases at the source and discharge them outdoors through the exhaust system, in order to ensure air quality in the laboratory and the health and safety of operators. However, this design usually only focuses on the collection of exhaust gases and does not give sufficient consideration to the cleaning and maintenance of the lab bench surface.

[0003] To keep laboratory benchtops clean, laboratories are often equipped with independent vacuum cleaners. These devices can effectively remove dust and debris generated during experiments. However, they operate independently of the exhaust gas collection system, leading to redundant equipment configuration and space occupation issues. Based on the above analysis, the main challenges currently faced by laboratory exhaust gas collection and benchtop cleaning include, but are not limited to, the inability of existing exhaust gas collection systems to simultaneously meet the cleaning needs of benchtop surfaces. In other words, there is a lack of an integrated solution that can flexibly switch between exhaust gas collection and benchtop cleaning functions, limiting the versatility of the equipment. Therefore, it is particularly necessary to develop a new type of exhaust gas collection device that can effectively collect exhaust gas and conveniently and quickly clean the surface of the laboratory bench. To this end, an exhaust gas collection device for laboratory bench exhaust is proposed. Utility Model Content

[0004] Based on the above description, this utility model provides a waste gas collection device for laboratory bench exhaust, which aims to solve the technical problems pointed out in the background art by using a single negative pressure drive source to achieve convenient switching between waste gas absorption and bench dust removal functions through innovative design.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a waste gas collection device for exhaust ventilation of an experimental bench, which is installed on the experimental bench body, includes;

[0006] The exhaust gas collection structure includes an exhaust hood and a filter, with a connecting pipe between the exhaust hood and the filter, and a negative pressure pipe connected to the outlet of the filter.

[0007] Vacuum hose;

[0008] The flow control structure includes an expansion chamber 1 and an expansion chamber 2 connected to a connecting pipe. An interface pipe connected to a vacuum hose is provided on the expansion chamber 2. A sealing plug 1 that can extend into the connecting pipe is slidably connected in the expansion chamber 1. A sealing plug 2 is slidably connected in the expansion chamber 2. A slide is located outside the connecting pipe. The slide has a sliding cavity. A sliding seat that is slidably connected to the sealing plug 1 and the sealing plug 2 is slidably connected in the sliding cavity.

[0009] The drive structure, located in the slide, is used to move sealing plug one and sealing plug two toward each other or away from each other.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the drive structure includes a dual-head motor disposed in the slide table, with lead screws mounted on both output ends of the dual-head motor. The two lead screws have opposite thread directions, and the two sets of slide blocks are respectively mounted on the outer side of the corresponding lead screws.

[0012] Furthermore, the slide table has a mounting hole located in the middle of the slide cavity, and the dual-head motor is installed in the mounting hole.

[0013] Furthermore, the sealing plug is composed of an integrally connected semi-circular portion and a rectangular portion, the diameter of the semi-circular portion and the width of the rectangular portion being equal to the inner diameter of the connecting pipe.

[0014] Furthermore, two sets of limiting bars are fixed in the sliding cavity, and the two sets of limiting bars are symmetrically distributed on both sides of the dual-head motor.

[0015] Furthermore, the expansion chamber one, the sliding platform, and the expansion chamber two are distributed sequentially from bottom to top.

[0016] Furthermore, a connecting rod is provided between the sealing plug one and the sealing plug two and the corresponding slide block, and a sliding hole is provided on the opposite side of the expansion chamber one and the expansion chamber two for the connecting rod to slide.

[0017] Furthermore, the exhaust hood is fixed to the rear side of the upper surface of the experimental platform by bolts, and the inlet of the exhaust hood faces the working area of ​​the experimental platform.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0019] This exhaust gas collection device for laboratory bench ventilation uses an exhaust hood and a dust suction hose for exhaust gas absorption and bench surface dust removal, respectively. The design of the drive structure and flow adjustment structure enables path switching, achieving the purpose of effectively collecting exhaust gas and cleaning the surface of the laboratory bench using the same negative pressure source. Attached Figure Description

[0020] Figure 1A schematic diagram of the structure of a waste gas collection device for laboratory bench exhaust provided in an embodiment of this utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the waste gas collection structure and its connection structure;

[0022] Figure 3 for Figure 2 A schematic diagram of a half-section structure;

[0023] Figure 4 This is a schematic diagram of the structure of the sealing plug in an embodiment of the present invention;

[0024] Figure 5 for Figure 3 A magnified schematic diagram of a portion of region A in the middle.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Experimental platform body; 2. Exhaust gas collection structure; 21. Exhaust hood; 22. Filter; 23. Connecting pipe; 24. Negative pressure pipe; 3. Dust suction hose; 4. Flow adjustment structure; 41. Expansion chamber one; 42. Expansion chamber two; 43. Interface pipe; 44. Sealing plug one; 45. Sealing plug two; 46. Slide table; 47. Slide seat; 48. Connecting rod; 49. Limiting stop bar; 5. Drive structure; 51. Dual-head motor; 52. Lead screw. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] like Figure 1-5 As shown in the figure, a waste gas collection device for laboratory bench exhaust is installed on the laboratory bench body 1. First, it is used to collect and exhaust harmful gases generated during chemical experiments, biological experiments, etc., that is, to lead out the waste gas, and then discharge it outdoors after purification, so as to ensure the air quality in the laboratory and the health and safety of the operators. Second, after switching the working mode, it is used to meet the cleaning needs of the laboratory bench. The waste gas collection device for laboratory bench exhaust includes a waste gas exhaust collection structure 2, a dust suction hose 3, a flow adjustment structure 4, and a drive structure 5.

[0029] Among them, such as Figure 1 and 2As shown, in this embodiment, the exhaust gas collection structure 2 includes an exhaust hood 21 and a filter 22. The exhaust hood 21 is fixed to the rear side of the upper surface of the experimental platform 1 by bolts. At this time, the inlet of the exhaust hood 21 faces the working area of ​​the experimental platform 1, so that the exhaust hood 21 can collect exhaust gas. A connecting pipe 23 is provided between the exhaust hood 21 and the filter 22 to guide the exhaust gas into the filter 22 for purification. The outlet of the filter 22 is connected to a negative pressure pipe 24. It should be noted that the filter 22 can be an activated carbon filter, a HEPA filter, a chemical filter, or a combination filter of one or more of the above filtration technologies. This is the prior art, and a combination filter is preferred, which aims to remove particulate matter and gaseous pollutants at the same time. The end of the negative pressure pipe 24 away from the filter 22 is connected to an external negative pressure fan to provide power for gas diversion. The negative pressure fan is not shown in the figure.

[0030] The exhaust hood 21 is the inlet for diverting exhaust gas, while the suction hose 3 is a dust removal and cleaning tool that can be manually adjusted to remove dust from the experimental platform 1.

[0031] To enable convenient switching between exhaust gas absorption and tabletop dust removal functions using a single negative pressure drive source, the flow control structure 4 in this embodiment includes an expansion chamber 1 41 and an expansion chamber 2 42 connected to the connecting pipe 23. The expansion chamber 2 42 is located above the expansion chamber 1 41. An interface pipe 43 connected to the suction hose 3 is fixedly installed on the expansion chamber 2 42, thus connecting the suction hose 3 to the connecting pipe 23. A sealing plug 44, capable of extending into the connecting pipe 23, is slidably connected in the expansion chamber 1 41 to control... Whether there is negative pressure at the inlet of the exhaust hood 21 is to avoid airflow interference at the exhaust hood 21 when the vacuum hose 3 is working. The expansion chamber 2 42 is slidably connected to the sealing plug 2 45 and the slide 46 outside the connecting pipe 23. The slide 46 is located below the expansion chamber 2 42 and above the expansion chamber 1 41. That is, the expansion chamber 1 41, the slide 46 and the expansion chamber 2 42 are distributed from bottom to top. In addition, the slide 46 has a sliding cavity, in which the slide seat 47 is slidably connected to the sealing plug 1 44 and the sealing plug 2 45 respectively.

[0032] It should be noted that a connecting rod 48 is provided between the sealing plug 44 and the sealing plug 45 and the corresponding slide block 47. Sliding holes are provided on opposite sides of the expansion chamber 41 and the expansion chamber 42 for the connecting rod 48 to slide. Furthermore, the sealing plugs 44 and 45 are... Figure 3From the perspective shown, the lengths of sealing plug 44 and sealing plug 45 must not be less than the length of the corresponding sliding hole to ensure that no gas can leak. In addition, sealing plug 44 is composed of an integrally connected semi-circular part and a rectangular part. The diameter of the semi-circular part and the width of the rectangular part are equal to the inner diameter of the connecting pipe 23. The length and width of sealing plug 45 are greater than the inner diameter of the interface pipe 43. When sealing plug 44 extends into the connecting pipe 23 and is sealed and blocked by sealing plug 44, sealing plug 45 is located on the side of expansion chamber 42 away from the connecting pipe 23. At this time, sealing plug 45 does not close the connection point between interface pipe 43 and expansion chamber 42.

[0033] The drive structure 5 is located in the slide 46 and is used to move the sealing plug 44 and the sealing plug 45 toward each other or away from each other.

[0034] Specifically, such as Figure 3 and 5 As shown, the drive structure 5 includes a double-headed motor 51 fixed in the slide table 46 by bolts. A lead screw 52 is mounted on both output ends of the double-headed motor 51. The threads of the two lead screws 52 are opposite. Two sets of slide blocks 47 are respectively mounted on the outside of the corresponding lead screws 52. Thus, when the lead screws 52 rotate, the two sets of slide blocks 47 move towards or away from each other, thereby driving the sealing plug 1 44 and sealing plug 2 45 to move towards or away from each other.

[0035] It should be noted that the slide table 46 has a mounting hole in the middle of the slide cavity, and the dual-head motor 51 is installed in the mounting hole. In addition, two sets of limit bars 49 are fixed in the slide cavity, and the two sets of limit bars 49 are symmetrically distributed on both sides of the dual-head motor 51.

[0036] In summary, when exhaust gas treatment is required, the dual-head motor 51 is activated, causing the lead screw 52 to rotate and the two sets of slides 47 to move towards each other. Through the transmission of the connecting rod 48, the first sealing plug 44 and the second sealing plug 45 move towards each other until the first sealing plug 44 retracts into the first expansion chamber 41, while the second sealing plug 45 moves to the connection point between the interface pipe 43 and the second expansion chamber 42, sealing and blocking this connection point. When the external negative pressure fan is working, mode one, i.e., exhaust gas exhaust mode, is realized. Conversely, when mode two, i.e., dust removal mode, is required, the dual-head motor 51 is activated in the opposite direction until the second sealing plug 45 moves to the side of the second expansion chamber 42 away from the connecting pipe 23, while the first sealing plug 44 extends into the connecting pipe 23 and is sealed and blocked by the first sealing plug 44, so that there is no negative pressure at the inlet of the exhaust hood 21. Thus, with a single negative pressure drive source, the functions of exhaust gas absorption and tabletop dust removal can be easily switched to increase the versatility and practicality of the equipment.

[0037] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A waste gas collecting device for laboratory bench exhaust, provided on a laboratory bench body (1), characterized in that, Include; Exhaust air exhaust collection structure (2), including exhaust hood (21) and filter (22), the exhaust hood (21) is provided with a communication pipe (23) between filter (22), the air outlet of filter (22) is connected with negative pressure pipe (24); Dust suction hose (3); Flow adjusting structure (4), including the extension chamber one (41) and the extension chamber two (42) connected with the communication pipe (23), the interface pipe (43) is arranged on the extension chamber two (42) and communicated with the dust suction hose (3), the extension chamber one (41) is slidably connected with the sealing plug one (44) capable of extending into the communication pipe (23), the extension chamber two (42) is slidably connected with the sealing plug two (45), the sliding table (46) outside the communication pipe (23), the sliding table (46) has a sliding cavity, and the sliding seat (47) connected with the sealing plug one (44) and the sealing plug two (45) is slidably connected in the sliding cavity; Driving structure (5) is arranged in the sliding table (46), for moving the sealing plug one (44) and the sealing plug two (45) towards or away from each other.

2. The exhaust gas collecting device for the fume exhaust of a laboratory bench according to claim 1, characterized in that: The driving structure (5) includes a double-head motor (51) arranged in the sliding table (46), a screw rod (52) is arranged at both output ends of the double-head motor (51), the screw threads of the two screw rods (52) are opposite, and the two groups of sliding seats (47) are arranged on the outer sides of the corresponding screw rods (52).

3. The exhaust gas collecting device for the fume exhaust of a laboratory bench according to claim 2, characterized in that: The sliding table (46) is provided with a mounting hole located in the middle of the sliding cavity, and the double-head motor (51) is mounted in the mounting hole.

4. The exhaust gas collecting device for the fume exhaust of a laboratory bench according to claim 3, characterized in that: The sealing plug one (44) is composed of a semicircular part and a rectangular part connected integrally, and the diameter of the semicircular part and the width of the rectangular part are equal to the inner diameter of the communication pipe (23).

5. The exhaust gas collecting device for the fume exhaust of a laboratory bench according to claim 4, characterized in that: Two groups of limiting baffle strips (49) are fixed in the sliding cavity, and the two groups of limiting baffle strips (49) are symmetrically distributed on both sides of the double-head motor (51).

6. The exhaust gas collecting device for the fume exhaust of a laboratory bench according to claim 1, characterized in that: The extension chamber one (41), the sliding table (46) and the extension chamber two (42) are sequentially distributed from bottom to top.

7. The exhaust gas collecting device for the fume exhaust of a laboratory bench according to claim 1, characterized in that: The sealing plug one (44) and the sealing plug two (45) are provided with a connecting rod (48) between the corresponding sliding seat (47), and the opposite side of the extension chamber one (41) and the extension chamber two (42) is provided with a sliding hole for sliding of the connecting rod (48).

8. The exhaust gas collecting device for the fume exhaust of a laboratory bench according to claim 1, characterized in that: The exhaust hood (21) is fixed on the rear side of the upper surface of the experiment table body (1) by bolts, and the inlet of the exhaust hood (21) faces the working area of the experiment table body (1).

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