An all-steel fume hood with an exhaust gas treatment mechanism

Abstract

The present invention relates to an all-steel fume hood with an exhaust gas treatment mechanism, comprising a cabinet body, a ventilation chamber recessed on the top of the cabinet body, an assembly chamber recessed on the bottom of the cabinet body, a filtering mechanism installed on the inner side of the assembly chamber, an air pump installed at the lower end of the filtering mechanism, a transmission component installed on the top of the filtering mechanism, an air suction platform installed on the inner top wall of the ventilation chamber, and the end of the transmission component away from the filtering mechanism is connected to the air suction platform. Evenly distributed throwing wings are installed on the periphery of the filtering platform, and the rebound rod controls the filtering platform and the dispersion platform to move upward very quickly, accompanied by a rotation in the opposite direction. The throwing wings rotate with the exhaust gas and the solid harmful substances therein, so that the airflow and harmful substances are accelerated and thrown out, and the airflow and harmful substances offset the impact of the airflow and harmful substances colliding with the filtering platform during the rising process of the filtering platform, so that the structure of the filtering platform is protected.

Description

Technical Field

[0001] The invention belongs to the field of fume hoods, and in particular relates to an all-steel fume hood with an exhaust gas treatment mechanism. Background Art

[0002] All-steel fume hoods are the most commonly used local exhaust equipment in laboratories. There are many types of them. Due to their different structures and different conditions of use, their exhaust effects are also different. The performance of all-steel fume hoods is good or bad, which mainly depends on the speed of air movement through the all-steel fume hoods. Fume hoods are mainly used for experiments with harmful substances such as biochemistry. During the experiment, substances that may produce waste gas containing a large amount of smoke and dust are placed in the fume hood for experiments to discharge the generated harmful substances and prevent harm to the experimenters. The filtering structure of the existing equipment in the process of treating waste gas will filter out solid harmful substances in the waste gas. Solid harmful substances will accumulate in the device in large quantities, and the structure containing harmful substances needs to be manually disassembled to carry out the removal operation. The structure containing harmful substances and the filtering structure are time-consuming and cumbersome to replace. Therefore, an all-steel fume hood with a waste gas treatment mechanism is proposed. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the following technical problems in the prior art: the filtering structure of the existing equipment in the process of treating exhaust gas will filter out solid harmful substances in the exhaust gas, and the solid harmful substances will accumulate in the device in large quantities, requiring manual dismantling of the structure containing the harmful substances to carry out the removal operation, and the replacement of the structure containing the harmful substances and the filtering structure is time-consuming and cumbersome.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an all-steel fume hood with an exhaust gas treatment mechanism, comprising a cabinet body, a ventilation chamber is recessed on the top of the cabinet body, an assembly chamber is recessed on the bottom of the cabinet body, a filtering mechanism is arranged on the inner side of the assembly chamber, an air pump is arranged at the lower end of the filtering mechanism, a transmission member is arranged on the top of the filtering mechanism, an air suction platform is arranged on the inner top wall of the ventilation chamber, and the end of the transmission member away from the filtering mechanism is connected to the air suction platform;

[0006] The inner bottom wall of the assembly chamber is concavely provided with a working groove, a placement platform is arranged in the working groove, and the placement platform is sleeved with the filtering mechanism.

[0007] As an optimal technical solution for an all-steel fume hood with an exhaust gas treatment mechanism, the filtering mechanism includes a cleaning mechanism and an intercepting mechanism, and the cleaning mechanism includes an outer barrel, a discharge arm, an inner barrel, an intercepting seat and a locking mechanism;

[0008] A receiving barrel is arranged on the top of the inner barrel, and the receiving barrel extends out of a matching hole. An exhaust barrel is arranged on the bottom of the outer barrel. There are several discharge arms, and the discharge arms are arranged in a circular array on the outer periphery of the outer barrel. The inner barrel is movably connected with the outer barrel, and the inner barrel is movably sleeved with the outer barrel.

[0009] The top of the outer barrel is concavely provided with an assembly hole 1, which matches the inner barrel. The circumferential surface of the inner barrel is reserved with a limiting hole 1 and a limiting hole 2, wherein the limiting hole 1 is below the limiting hole 2, and the locking mechanism is arranged in a circular array on the inner side of the outer barrel.

[0010] As an optimal technical solution for an all-steel fume hood with an exhaust gas treatment mechanism, an inner truncated platform is installed on the top of the inner side of the inner barrel, the inner truncated platform is fixedly connected to the bottom of the receiving barrel, an interception seat is installed on the inner side of the inner barrel, the bottom of the interception seat is connected to the inner barrel, the inner truncated platform is above the interception seat, a storage chamber is formed between the top of the inner side of the inner barrel and the inner truncated platform, a communication channel is reserved at the lower side of the storage chamber, and the inner barrel is annularly arrayed with a number of discharge holes corresponding to the discharge arm;

[0011] There are several rebound rods, which are arranged in a circular array at the bottom of the inner barrel, the tops of the rebound rods are connected to the interception seats, and the bottoms of the rebound rods are arranged on the top of the exhaust barrel.

[0012] In the initial state, the inner peripheral wall of the outer barrel blocks the discharge hole, the inner barrel blocks the discharge arm, the discharge arm is below the discharge hole, and the locking mechanism extends into the limit hole to keep the inner barrel at the top dead center;

[0013] The waste gas reaches the interception seat from the receiving barrel, and the solid harmful substances in the waste gas are blocked by the interception seat. The solid harmful substances are stored in the space between the interception seat and the inner barrel until some of the solid harmful substances reach the inner side of the storage chamber;

[0014] The activated carbon arranged on the inner side of the interception seat can further absorb harmful substances.

[0015] As an optimal technical solution for an all-steel fume hood with an exhaust gas treatment mechanism, the locking mechanism also includes a locking member, which includes channel one, an elastic member and a locking block. The locking block is movably connected to the inner side of channel one, and the elastic member is located on the inner side of channel one. One end of the elastic member is connected to the outer barrel, and the other end of the elastic member is connected to the locking block. The locking block can be movably extended into limiting hole one or limiting hole two.

[0016] As an optimal technical solution for an all-steel fume hood with an exhaust gas treatment mechanism, the limiting hole one includes locking holes b, and there are several locking holes b, which are distributed in a circular array on the inner barrel. The limiting hole two includes locking holes a, and there are several locking holes a, which are distributed in a circular array on the inner barrel. The locking holes b and the locking holes a are distributed alternately, and the spacing between the locking hole a and the adjacent locking hole b is L, and the spacing between two adjacent locking holes b is also L.

[0017] As an optimal technical solution for an all-steel fume hood with an exhaust gas treatment mechanism, the interception seat also includes a dispersion table, a filter table and an assembly ring. The assembly ring is embedded in the inner circumferential wall of the inner barrel, the central part of the dispersion table protrudes upward, the central part of the dispersion table is under the receiving barrel, the dispersion table is installed on the top of the filter table, the lower side of the filter table is connected to the assembly ring, and the head of the rebound rod is connected to the assembly ring.

[0018] As an optimal technical solution for an all-steel fume hood with an exhaust gas treatment mechanism, the distance between the bottom side of the inner circular table and the filter table is smaller than the distance between the upper side of the inner circular table and the filter table, the rebound rod is bent into an arc, the straight line distance from the bottom end of the rebound rod to the center of the inner barrel is smaller than the straight line distance between the top of the rebound rod and the center of the inner barrel, the discharge hole is at the same height as the bottom end of the filter table, and the channel 1 is below the discharge arm;

[0019] The outer barrel comprises a cylindrical shell, a circular sheet 1 and a circular sheet 2, wherein the circular sheet 1 and the circular sheet 2 are connected through the cylindrical shell, the circular sheet 1 is above the circular sheet 2, and the assembly hole 1 is on the circular sheet 1.

[0020] The beneficial effects of the all-steel fume hood with an exhaust gas treatment mechanism of the present invention are: the accumulated waste can be automatically and quantitatively removed through the filtering mechanism, solving the problem of difficult, time-consuming and cumbersome manual cleaning;

[0021] By using the rebound rod, the rebound rod controls the filter table and the dispersion table to rotate in the opposite direction, and rotates with the airflow and harmful substances, so that the exhaust gas near the filter table and the solid harmful substances therein form a vortex, which surrounds the filter table. The airflow and harmful substances in the vortex form a temporary barrier. The vortex weakens the impact between the filter table during its rise and the airflow and solid harmful substances that continue to enter the inner barrel, so that the structure of the filter table is protected. The rotation of the filter table can also throw out the solid harmful substances stuck on the filter table, so that its filtering capacity can be restored to a certain extent.

[0022] Through the use of the inner circular table, after blockage occurs, the solid harmful substances in the storage room will accumulate to the extent of squeezing the inner circular table. The inner circular table is squeezed close to the filter table, thereby reducing the entry of exhaust gas into the inner barrel and reducing damage to the inner barrel and the filter table. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic cross-sectional structural diagram of the side of the present invention;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the filtering mechanism of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the inner barrel of the present invention;

[0028] Figure 5 The cross-sectional structure of the front side of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 6 For the present invention Figure 5 A schematic diagram of the local enlarged structure of part E in the middle;

[0030] Figure 7 For the present invention Figure 5 A schematic diagram of the local enlarged structure of part F in the middle;

[0031] Figure 8 A schematic diagram of the three-dimensional structure of the interception seat of the present invention;

[0032] Fig. 9 The cross-sectional structure of the front side of the present invention is shown in FIG. Figure 2 ;

[0033] Fig.10 For the present invention Fig. 9 A schematic diagram of the partially enlarged structure of the H part;

[0034] Fig.11 For the present invention Fig. 9 Schematic diagram of the local enlarged structure of part G in the middle.

[0035] Figure numerals: 1. cabinet; 2. ventilation chamber; 3. suction table; 4. placement table; 5. assembly room; 6. filtering mechanism; 8. transmission member; 9. working tank; 12. receiving barrel; 13. outer barrel; 14. discharge arm; 15. exhaust barrel; 16. interception seat; 17. inner barrel; 18. channel 1; 19. elastic member; 20. locking block; 162. dispersion table; 163. filtering table; 164. track groove; 165. locking hole a; 166. locking hole b; 167. rebound rod; 175. inner circular table; 176. storage chamber. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0040] like Figure 1-11 As shown, the present invention proposes an all-steel fume hood with an exhaust gas treatment mechanism, comprising a cabinet body 1, a ventilation chamber 2 is recessed on the top of the cabinet body 1, an assembly chamber 5 is recessed on the bottom of the cabinet body 1, a filtering mechanism 6 is arranged on the inner side of the assembly chamber 5, an air pump is arranged at the lower end of the filtering mechanism 6, a transmission member 8 is arranged on the top of the filtering mechanism 6, an air suction platform 3 is arranged on the inner top wall of the ventilation chamber 2, and the end of the transmission member 8 away from the filtering mechanism 6 is connected to the air suction platform 3;

[0041] A working groove 9 is recessed on the inner bottom wall of the assembly chamber 5 , a placement platform 4 is arranged in the working groove 9 , and the placement platform 4 is sleeved with the filtering mechanism 6 .

[0042] The filtering mechanism 6 includes a debris removal mechanism and an interception mechanism, and the debris removal mechanism includes an outer barrel 13, a discharge arm 14, an inner barrel 17, an interception seat 16 and a locking mechanism;

[0043] The receiving barrel 12 is arranged on the top of the inner barrel 17, the exhaust barrel 15 is arranged on the bottom of the outer barrel 13, there are several discharge arms 14, the discharge arms 14 are arranged in a circular array on the outer periphery of the outer barrel 13, the inner barrel 17 is movably connected with the outer barrel 13, and the inner barrel 17 is movably sleeved with the outer barrel 13;

[0044] The top of the outer barrel 13 is recessed with an assembly hole 1, which matches the inner barrel 17. The circumferential surface of the inner barrel 17 is reserved with a limiting hole 1 and a limiting hole 2, wherein the limiting hole 1 is below the limiting hole 2. The locking mechanism is arranged in a circular array on the inner side of the outer barrel 13.

[0045] An inner circumferential table 175 is installed at the top of the inner side of the inner barrel 17, and the inner circumferential table 175 is fixedly connected to the bottom of the receiving barrel 12. An interception seat 16 is installed at the inner side of the inner barrel 17, and the bottom of the interception seat 16 is connected to the inner barrel 17. The inner circumferential table 175 is above the interception seat 16. A storage chamber 176 is formed between the top of the inner side of the inner barrel 17 and the inner circumferential table 175. A communication channel is reserved at the lower side of the storage chamber 176. The inner barrel 17 is annularly arrayed with a plurality of discharge holes corresponding to the discharge arm 14.

[0046] There are several rebound rods 167 , which are arranged in a circular array at the bottom of the inner barrel 17 , the top of the rebound rod 167 is connected to the interception seat 16 , and the bottom of the rebound rod 167 is installed on the top of the exhaust barrel 15 .

[0047] In the initial state, the inner peripheral wall of the outer barrel 13 blocks the discharge hole, and the inner barrel 17 blocks the discharge arm 14. At this time, the discharge arm 14 is below the discharge hole, and the locking mechanism extends into the limit hole to keep the inner barrel 17 at the top dead center;

[0048] The exhaust gas reaches the interception seat 16 from the receiving barrel 12 , and the harmful substances in the exhaust gas are blocked by the interception seat 16 . The harmful substances are stored in the space between the interception seat 16 and the inner barrel 17 until the harmful substances reach the inner side of the storage chamber 176 .

[0049] The locking mechanism also includes a locking member, which includes a channel 18, an elastic member 19 and a locking block 20. The locking block 20 is movably connected to the inner side of the channel 18. The elastic member 19 is located on the inner side of the channel 18. One end of the elastic member 19 is connected to the outer barrel 13, and the other end of the elastic member 19 is connected to the locking block 20. The locking block 20 movably extends into the limiting hole 1 or the limiting hole 2.

[0050] The limiting hole one includes locking holes b166, and there are several locking holes b166, which are distributed in a circular array on the inner barrel 17. The limiting hole two includes locking holes a165, and there are several locking holes a165, which are distributed in a circular array on the inner barrel 17. The locking holes b166 and the locking holes a165 are distributed alternately. The spacing between the locking hole a165 and the adjacent locking hole b166 is L, and the spacing between two adjacent locking holes b166 is also L.

[0051] The interception seat 16 also includes a dispersion table 162, a filtering table 163 and an assembly ring. The assembly ring is embedded in the inner peripheral wall of the inner barrel 17. The central part of the dispersion table 162 protrudes upward. The central part of the dispersion table 162 is below the receiving barrel 12. The dispersion table 162 is installed on the top of the filtering table 163. The lower side of the filtering table 163 is connected to the assembly ring, and the head of the rebound rod 167 is connected to the assembly ring.

[0052] The distance between the bottom side of the inner circumferential table 175 and the filter table 163 is smaller than the distance between the top side of the inner circumferential table 175 and the filter table 163. The rebound rod 167 is bent into an arc shape. The straight-line distance from the bottom end of the rebound rod 167 to the center of the inner barrel 17 is smaller than the straight-line distance from the top of the rebound rod 167 to the center of the inner barrel 17. The discharge hole is at the same height as the bottom end of the filter table 163. The channel 18 is under the discharge arm 14. The outer barrel 13 includes a cylindrical shell, a circular sheet 1 and a circular sheet 2. The circular sheet 1 and the circular sheet 2 are connected by the cylindrical shell. The circular sheet 1 is above the circular sheet 2, and the assembly hole 1 is on the circular sheet 1.

[0053] The transmission member 8 includes a pipeline, the locking block 20 is hemispherical, the inner truncated cone 175 is trumpet-shaped, a discharge channel is reserved inside the discharge arm 14, the placement table 4 is fixedly connected to the assembly chamber 5 by bolts, the elastic member 19 includes a spring, and the material of the rebound rod 167 is carbon fiber.

[0054] Filter holes are evenly arranged on the filter platform 163, and activated carbon is also installed in the filter platform 163 to absorb chemical substances in the exhaust gas.

[0055] The radius of the filter holes ranges from 12 to 45 microns.

[0056] The discharge arm 14 passes through the placement platform 4 and is connected to a storage bag, through which solid hazardous substances can be stored, and a pipe is connected to the exhaust barrel 15 to exhaust gas through the pipe.

[0057] The outer periphery of the filter table 163 is provided with evenly distributed spreading wings, and the rebound rod 167 controls the filter table 163 and the dispersion table 162 to move upward very quickly, accompanied by a rotation in the opposite direction, and the spreading wings rotate with the exhaust gas and the solid harmful substances therein;

[0058] The exhaust gas near the filter table 163 and the solid harmful substances therein form a vortex, which surrounds the filter table 163, and the solid harmful substances in the exhaust gas are accelerated and thrown out. The airflow and harmful substances in the vortex form a temporary barrier, weakening the direct collision between the airflow and the solid harmful substances that continue to enter the inner barrel 17 during the rising process of the filter table 163. The exhaust gas from top to bottom will be changed in direction by the vortex, making it approach the filter table 163 more slowly and softly, thereby reducing the impact of the collision with the filter table 163, so that the structure of the filter table 163 is protected. The rotation of the filter table 163 can also cause the solid harmful substances stuck on the filter table 163 to be thrown out, so that its filtering capacity can be restored to a certain extent.

[0059] The receiving barrel 12 is connected to the transmission member 8 via an elastic hose, and the transmission member 8 includes a pipeline.

[0060] The locking hole a165 and the locking hole b166 are connected by a track groove 164 , and when the locking block 20 slides in the track groove 164 , the filtering platform 163 rotates.

[0061] The top dead center is the highest point that the inner barrel 17 can reach.

[0062] The specific implementation method is as follows: the vacuum pump connected to the bottom of the exhaust barrel 15 is started, and air is extracted in the ventilation chamber 2 through the receiving barrel 12, the transmission member 8 and the suction platform 3. The transmission member 8 is connected to the inner cavity of the suction platform 3. The bottom of the suction platform 3 is concave with many communication holes. When conducting experiments in the ventilation chamber 2, the generated exhaust gas reaches the receiving barrel 12 through the suction platform 3 and the transmission member 8. The exhaust gas reaches the inside of the filtering mechanism 6 from the receiving barrel 12. The exhaust gas hits the dispersion platform 162 and then disperses to the surrounding surface of the filtering platform 163. The solids in the exhaust gas are The harmful substances are intercepted by the filter 163, and gravity and airflow drive the solid harmful substances filter 163 to gather from the bottom until the middle and even the top of the filter 163 are blocked, resulting in the obstruction of airflow and the increase of the force of airflow squeezing the interception seat 16. The force of gravity squeezing the interception seat 16 by the harmful substances increases until the squeezing force of the interception seat 16 causes the locking hole b166 to disengage from the locking block 20, the locking block 20 retreats, and the elastic member 19 shortens, causing the interception seat 16 and the inner barrel 17 to move downward under pressure;

[0063] Due to the shape of the rebound rod 167, the twisting of the interception seat 16 and the inner barrel 17 during the downward movement has a component force in the tangential direction of the interception seat 16, which causes the rebound rod 167 to rotate forward;

[0064] During the movement of the inner barrel 17, the discharge hole on the inner barrel 17 is connected to the suction platform 3, and the harmful substances are discharged from the suction platform 3. The harmful substances on the interception seat 16 are rapidly reduced, so that the force pressing the interception seat 16 is rapidly reduced. When the locking block 20 is exactly corresponding to the locking hole a165, the locking block 20 is pushed by the elastic member 19 to be embedded in the locking hole a165. Since the harmful substances on the interception seat 16 are reduced, the locking block 20 can lock the interception seat 16.

[0065] As the harmful substances on the interception seat 16 are reduced to a very small amount, the rebound force of the rebound rod 167 is greater than the dead weight of the interception seat 16 and the locking force of the locking block 20, and the rebound rod 167 pushes the interception seat 16 to move up and reverse until the locking block 20 corresponds to the locking hole b166 and the locking block 20 enters the locking hole b166 to lock the position of the interception seat 16.

[0066] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An all-steel fume hood with an exhaust gas treatment mechanism, characterized in that: The cabinet (1) comprises a cabinet body (1), a ventilation chamber (2) is recessed on the top of the cabinet body (1), an assembly chamber (5) is recessed on the bottom of the cabinet body (1), a filtering mechanism (6) is arranged on the inner side of the assembly chamber (5), a transmission member (8) is arranged on the top of the filtering mechanism (6), an air suction platform (3) is arranged on the inner top wall of the ventilation chamber (2), and the end of the transmission member (8) away from the filtering mechanism (6) is connected to the air suction platform (3); The inner bottom wall of the assembly chamber (5) is recessed with a working groove (9), a placement table (4) is arranged in the working groove (9), the placement table (4) is sleeved with a filtering mechanism (6), and a vacuum pump is arranged at the lower end of the filtering mechanism (6); The filtering mechanism (6) comprises a debris removal mechanism and an interception mechanism, wherein the debris removal mechanism comprises an outer barrel (13), a discharge arm (14), an inner barrel (17), an interception seat (16) and a locking mechanism; A receiving barrel (12) is arranged on the top of the inner barrel (17), an exhaust barrel (15) is arranged on the bottom of the outer barrel (13), a plurality of discharge arms (14) are arranged in a circular array on the outer circumference of the outer barrel (13), and the inner barrel (17) and the outer barrel (13) are movably sleeved; The top of the outer barrel (13) is concavely provided with an assembly hole 1, which matches the inner barrel (17); the circumferential surface of the inner barrel (17) is reserved with a limiting hole 1 and a limiting hole 2, wherein the limiting hole 1 is below the limiting hole 2; and the locking mechanism is arranged in an annular array on the inner side of the outer barrel (13); The inner circumferential table (175) is fixedly connected to the bottom of the receiving barrel (12), and an intercepting seat (16) is arranged on the inner side of the inner barrel (17). The bottom of the intercepting seat (16) is connected to the inner barrel (17), and a storage chamber (176) is formed between the top of the inner side of the inner barrel (17) and the inner circumferential table (175). A communication channel is reserved on the lower side of the storage chamber (176), and the inner barrel (17) is provided with a plurality of discharge holes in an annular array corresponding to the discharge arm (14); There are a plurality of rebound rods (167), which are arranged in a circular array at the bottom of the inner barrel (17), the top of the rebound rod (167) is connected to the interception seat (16), and the bottom of the rebound rod (167) is installed on the top of the exhaust barrel (15).

2. The all-steel fume hood with an exhaust gas treatment mechanism according to claim 1, characterized in that: The locking mechanism further comprises a locking member, the locking member comprising a channel one (18), an elastic member (19) and a locking block (20), the locking block (20) being movably connected to the inner side of the channel one (18), the elastic member (19) being located on the inner side of the channel one (18), one end of the elastic member (19) being connected to the outer barrel (13), the other end of the elastic member (19) being connected to the locking block (20), and the locking block (20) being movably extended into the limiting hole one or the limiting hole two.

3. The all-steel fume hood with an exhaust gas treatment mechanism according to claim 2, characterized in that: The first limiting hole includes a locking hole b (166), the locking holes b (166) are multiple, and the locking holes b (166) are distributed in a circular array on the inner barrel (17). The second limiting hole includes a locking hole a (165), the locking holes a (165) are multiple, and the locking holes a (165) are distributed in a circular array on the inner barrel (17). The locking holes b (166) and the locking holes a (165) are alternately distributed. The spacing between the locking holes a (165) and the adjacent locking holes b (166) is L, and the spacing between two adjacent locking holes b (166) is also L.

4. The all-steel fume hood with an exhaust gas treatment mechanism according to claim 1, characterized in that: The interception seat (16) further comprises a dispersion platform (162), a filtering platform (163) and an assembly ring, wherein the assembly ring is embedded in the inner peripheral wall of the inner barrel (17), the central portion of the dispersion platform (162) protrudes upward, the central portion of the dispersion platform (162) is below the receiving barrel (12), the dispersion platform (162) is installed on the top of the filtering platform (163), the lower side of the filtering platform (163) is connected to the assembly ring, and the head of the rebound rod (167) is connected to the assembly ring.

5. The all-steel fume hood with an exhaust gas treatment mechanism according to claim 4, characterized in that: The distance between the bottom side of the inner circumferential table (175) and the filtering table (163) is smaller than the distance between the top side of the inner circumferential table (175) and the filtering table (163). The rebound rod (167) is bent into an arc shape. The straight line distance from the bottom end of the rebound rod (167) to the center of the inner barrel (17) is smaller than the straight line distance from the top end of the rebound rod (167) to the center of the inner barrel (17).

6. The all-steel fume hood with an exhaust gas treatment mechanism according to claim 5, characterized in that: The top of the discharge arm (14) and the underside of the filter table (163).

7. The all-steel fume hood with an exhaust gas treatment mechanism according to claim 6, characterized in that: Channel one (18) is below the discharge arm (14).

8. The all-steel fume hood with an exhaust gas treatment mechanism according to claim 5, characterized in that: The outer barrel (13) comprises a cylindrical shell, a circular sheet 1 and a circular sheet 2, wherein the circular sheet 1 and the circular sheet 2 are connected via the cylindrical shell, the circular sheet 1 is on the circular sheet 2, and the assembly hole 1 is on the circular sheet 1.

Images