A kind of safety exhaust device for laboratory

Abstract

The invention discloses a technical field of laboratory ventilation devices, specifically a safe exhaust device for laboratories, comprising a purification barrel, an air intake duct and an exhaust duct are fixedly installed on the side of the purification barrel, the upper and lower ends of the purification barrel are both open, a dust collecting tank is threadedly installed on the lower end of the purification barrel, an upper cover is fixedly installed on the upper end of the purification barrel, a support seat is fixedly connected to the inner cavity of the purification barrel, a spherical groove is penetrated from top to bottom on the upper end of the support seat, an air outlet is penetrated on the inner side of the spherical groove, and the beneficial effect of the invention is that exhaust gas is sent into the upper end of the inner cavity of the purification barrel through the air intake duct, the exhaust gas flows downward along the inner cavity of the purification barrel into the circular cavity at the upper end of the spherical seat, the exhaust gas flows from top to bottom along the circular cavity, the exhaust gas flows through the filter screen and the purification plate in sequence, the impurities in the exhaust gas are first filtered through the filter screen, and the filtered exhaust gas is then purified through the purification plate.

Description

Technical Field

[0001] The invention relates to the technical field of laboratory ventilation devices, in particular to a safety exhaust device for laboratories. Background Art

[0002] The reaction of various species in the laboratory will not only produce reaction residues, but also various toxic gases. In the process of treating toxic gases, corresponding treatment devices are mostly used to purify the air in the laboratory. Most of the existing air purification treatment devices are simple fans and multiple pipeline structures. The operation of the fan and the pipeline connection are used to suck out the indoor gas and discharge it into the purification device. However, there are certain defects in actual use.

[0003] When treating the waste gas in the laboratory, the bacteria level is mainly purified through the purification parts installed inside. However, the waste gas discharged from the laboratory will inevitably be mixed with impurities such as dust and floccules. This will cause the purification plate to be too hammered when purifying the waste gas. These impurities will adhere to the surface of the purification plate, causing the purification plate to be contaminated. In severe cases, it will directly cause the waste gas to be unable to continue to pass through the purification plate, affecting the purification efficiency. Summary of the invention

[0004] 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.

[0005] The purpose of the present invention is to provide a safe exhaust device for laboratory to solve the problems raised in the above background technology.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a safe exhaust device for a laboratory, comprising a purification barrel, an air intake duct and an exhaust duct are fixedly installed on the side of the purification barrel, the upper and lower ends of the purification barrel are open, a dust collecting tank is threadedly installed on the lower end of the purification barrel, an upper cover is fixedly installed on the upper end of the purification barrel, and a support seat is fixedly connected to the inner cavity of the purification barrel, a spherical groove is provided on the upper end of the support seat from top to bottom, an air outlet is provided on the inner side of the spherical groove, the air outlet is connected to the inner cavity of the exhaust duct, a spherical seat is rotatably installed in the spherical groove, a rotating shaft is symmetrically fixedly connected to the side of the spherical seat, the spherical seat is rotatably connected to the support seat through the rotating shaft, one of the rotating shafts is driven by a motor shaft of a stepper motor fixedly installed on the side of the purification barrel, filter assemblies are symmetrically installed on the upper and lower ends of the spherical seat, and a drive assembly is installed on the upper end of the upper cover.

[0007] As a preferred solution of the laboratory safety exhaust device described in the present invention, circular cavities are symmetrically opened at the upper and lower ends of the spherical seat, and connecting grooves are opened on the inner walls of the two circular cavities. The connecting groove at the top is connected to the air outlet, and the filter assembly includes a locking mechanism, a shaking filter mechanism and a purification mechanism arranged in sequence along the circular cavity port to the bottom, and the two shaking filter mechanisms symmetrically distributed above and below are connected by a rotating transmission assembly, and a docking mechanism is installed on the locking mechanism at the upper end of the shaking filter mechanism.

[0008] As a preferred solution of the laboratory safety exhaust device of the present invention, the rotary transmission assembly includes a transmission shaft installed through the bottom of the circular cavity, and regular polygonal docking grooves are symmetrically opened at both ends of the transmission shaft, and two annular plates are fixedly sleeved on the transmission shaft, and the two annular plates are respectively arranged at the bottom of the two circular cavities, and the annular plates are in rotational contact with the bottom of the circular cavity; The purification mechanism includes a sleeve sleeved on the transmission shaft, the outer side of the sleeve is fixedly sleeved with a purification plate, the outer side of the purification plate contacts the inner side wall of the circular cavity, and one end of the shaking filter mechanism contacts the purification mechanism.

[0009] As a preferred solution of the laboratory safety exhaust device described in the present invention, the shaking filter mechanism includes a first regular polygonal rod inserted in the regular polygonal docking groove, and a rotating sleeve and a positioning ring are sequentially sleeved on the first regular polygonal rod, the positioning ring is abutted with the sleeve and the purification plate, the positioning ring is fixedly connected to the first regular polygonal rod, one end of the first regular polygonal rod is connected to the docking mechanism, and a hemispherical driving block is symmetrically fixedly connected on the side of the positioning ring away from the purification plate. A first regular polygonal groove is penetrated through the rotating sleeve, and two limiting rings are fixedly sleeved on the rotating sleeve. A filter disc is sleeved on the rotating sleeve between the two limiting rings, and a reset spring is inserted on one side of the filter disc close to the end of the circular cavity, and one end of the reset spring abuts against the locking mechanism. A filter net is fixedly installed at the bottom of the inner cavity of the filter disc, and the two limiting rings are respectively in rotational contact with the upper and lower sides of the bottom of the filter disc, and a hemispherical extrusion block is symmetrically fixedly connected on one side of the filter disc close to the positioning ring. A cleaning brush is fixedly installed on the side of the rotating sleeve in the inner cavity of the filter disc, and the cleaning brush is in sliding contact with the filter net.

[0010] As a preferred solution of the laboratory safety exhaust device described in the present invention, the shaking filter mechanism is installed in a circular cavity, the rotating sleeve is slidably connected to the first regular polygonal rod, the inner wall of the circular cavity is provided with a plurality of fan-shaped guide grooves in a circular array, the side of the filter plate is fixedly connected with a plurality of fan-shaped blocks in a circular array, the fan-shaped blocks are slidably connected to the fan-shaped guide grooves up and down, and the filter plate is slidably connected to the inner wall of the circular cavity up and down.

[0011] As a preferred solution of the laboratory safety exhaust device described in the present invention, the locking mechanism includes an annular positioning seat installed at the end of the circular cavity, a horizontal plate is fixedly installed on the inner side of the annular positioning seat, and a movable groove is symmetrically provided at the upper end of the horizontal plate, and L-shaped plug plates are slidably installed in the two movable grooves, and a slot is symmetrically provided at the upper end of the inner cavity of the circular cavity, one end of the L-shaped plug plate passes through the horizontal plate and the annular positioning seat in sequence and is plugged into the slot, the L-shaped plug plate is slidably connected to the horizontal plate and the annular positioning seat, a first spring sheet is fixedly installed on the side of the L-shaped plug plate, one side of the first spring sheet abuts against the inner side wall of the movable groove, the docking mechanism is installed on the horizontal plate, and the annular positioning seat abuts against the reset spring; The docking mechanism includes a connecting head rotatably mounted on the transverse plate, a circular groove is provided at the end of the connecting head away from the transverse plate, a plurality of slots are provided on the inner wall of the circular groove in a ring array, a synchronous shaft is fixedly connected to the end of the connecting head close to the transverse plate, one end of the synchronous shaft passes through the transverse plate and is fixedly sleeved with a synchronous ring, the synchronous shaft is rotatably connected to the transverse plate, and the end of the synchronous shaft away from the connecting head is fixedly connected to the first regular polygonal rod.

[0012] As a preferred solution of the laboratory safety exhaust device of the present invention, a concave plate is fixedly mounted on the upper end of the upper cover, and the driving assembly includes a rotating mechanism rotatably mounted on the upper cover, and a driving mechanism is installed in the rotating mechanism.

[0013] As a preferred embodiment of the laboratory safety exhaust device described in the present invention, the rotating mechanism includes a cylinder inserted through the upper cover, the cylinder is rotatably connected to the upper cover, and a second regular polygonal groove is opened through the upper end of the cylinder from top to bottom. The upper and lower ends of the cylinder are respectively fixedly sleeved with transmission gears and connecting rings, and the transmission gears and connecting rings are symmetrically distributed on the upper and lower sides of the upper cover. The side of the transmission gear is meshed with a driving gear, and the driving gear is driven by the output shaft of a servo motor fixedly mounted on the upper end of the concave plate, and the driving mechanism is arranged on the upper cover.

[0014] As a preferred embodiment of the laboratory safety exhaust device described in the present invention, the driving mechanism includes a second regular polygonal rod inserted into the second regular polygonal groove, the upper end of the second regular polygonal rod is fixedly connected with a circular block, the side of the circular block is provided with an annular groove, the upper end of the concave plate is fixedly installed with an electric telescopic rod, the upper end of the inner rod of the electric telescopic rod is fixedly installed with a lifting plate, one end of the lifting plate is provided with a U-shaped groove, the U-shaped groove is clamped with the annular groove, the lower end of the second regular polygonal rod is fixedly connected with a docking joint, the side of the docking joint is provided with a contraction groove, convex blocks are symmetrically and slidably installed at both ends of the contraction groove, a second spring piece is fixedly installed between the two convex blocks, and the lower end of the convex block is a slope.

[0015] As a preferred solution of the laboratory safety exhaust device described in the present invention, the second regular polygonal rod is slidably connected to the second regular polygonal groove up and down, the annular groove is rotationally contacted with the U-shaped groove, the docking head is plugged into the circular groove, and the convex clamping block is clamped into the clamping groove.

[0016] The beneficial effects of the present invention are: 1. During operation, the exhaust gas is sent into the upper end of the inner cavity of the purification barrel through the air inlet pipe, and the exhaust gas flows downward along the inner cavity of the purification barrel into the circular cavity at the upper end of the spherical seat. The exhaust gas flows from top to bottom along the circular cavity, and the exhaust gas flows through the filter screen and the purification plate in turn. The impurities in the exhaust gas are first filtered through the filter screen, and the filtered exhaust gas is purified by the purification plate. The purified exhaust gas flows out along the connecting groove, the air outlet, and the exhaust pipe, thereby completing the filtering and purification of the exhaust gas.

[0017] 2. The motor shaft of the stepper motor drives the rotating shaft to rotate half a circle, and the rotating shaft drives the spherical seat to rotate 180 degrees. The spherical seat drives the two filter components to rotate, so that the positions of the two filter components are exchanged, and the two filter components are used alternately. When one filter component is cleaned and replaced, the other filter component can continue to filter and purify the exhaust gas, thereby continuously purifying and cleaning the exhaust gas.

[0018] 3. When purifying and filtering the exhaust gas, the docking mechanism is docked with the driving mechanism, and the driving mechanism is driven to rotate by the rotating mechanism, and the driving mechanism drives the docking mechanism to rotate, and the docking mechanism drives the shaking filter mechanism to rotate, so that the cleaning brush continuously cleans the filter net, and at the same time the filter plate drives the filter net to shake back and forth up and down, thereby preventing impurities from clogging the filter net.

[0019] 4. The two shaking filter mechanisms rotate synchronously through the set rotating transmission assembly. At this time, the cleaning brush in the shaking filter mechanism at the bottom continuously cleans the filter. At the same time, the filter plate drives the filter to shake up and down reciprocatingly, thereby cleaning up the impurities on the upper end of the filter. At this time, the impurities will fall down into the dust collecting tank for collection. You only need to clean the dust collecting tank regularly. The operation is simple and convenient.

[0020] 5. Through the locking mechanism, the shaking filter mechanism and purification plate can be easily installed and disassembled, which is convenient for later maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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: Figure 1 This is a structural stereogram of the laboratory safety exhaust device of the present invention; Figure 2 This is a cross-sectional view of the structure of the laboratory safety exhaust device of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 4 It is a side sectional view of the spherical seat structure of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle; Figure 6 It is an exploded view of the support seat, spherical seat and filter assembly structure of the present invention; Figure 7 It is an exploded view of the rotary transmission assembly, the vibration filtering mechanism and the docking mechanism structure of the present invention; Figure 8 This is an exploded view of the upper cover and drive assembly structure of the present invention.

[0022] In the figure: 1, purification barrel; 11, air inlet pipe; 12, exhaust pipe; 13, dust collecting tank; 14, upper cover; 15, concave plate; 2, support seat; 21, spherical groove; 22, air outlet; 23, spherical seat; 24, rotating shaft; 25, circular cavity; 26, connecting groove; 27, fan-shaped guide groove; 28, slot; 3, transmission shaft; 31, regular polygon docking groove; 32, annular plate; 33, sleeve; 34, purification plate; 4, first regular polygon rod; 41, positioning ring; 42, hemispherical drive block; 43, filter plate; 44, filter screen; 45, fan-shaped block; 46, hemispherical extrusion block; 5, rotating sleeve; 51, first Regular polygonal groove; 52, limit ring; 53, cleaning brush; 6, annular positioning seat; 61, horizontal plate; 62, movable groove; 63, L-shaped plug plate; 64, first spring piece; 65, reset spring; 7, connecting head; 71, circular groove; 72, clamping groove; 73, synchronous shaft; 74, synchronous ring; 8, cylinder; 81, second regular polygonal groove; 82, connecting ring; 83, transmission gear; 84, driving gear; 85, second regular polygonal rod; 86, circular block; 87, annular groove; 88, electric telescopic rod; 89, lifting plate; 891, U-shaped groove; 9, docking head; 91, contraction groove; 92, convex clamping block; 93, second spring piece. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, 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 drawings of the specification, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments 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 technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figures 1 to 8 The present invention provides a technical solution: a safe exhaust device for a laboratory, comprising a purification barrel 1, characterized in that an air intake duct 11 and an exhaust duct 12 are fixedly installed on the side of the purification barrel 1, the inner cavities of the air intake duct 11 and the exhaust duct 12 are both connected to the inner cavity of the purification barrel 1, an air pump is installed on the air intake duct 11, so that the exhaust gas is sent to the upper end of the inner cavity of the purification barrel 1 through the air intake duct 11, the upper and lower ends of the purification barrel 1 are both open, a dust collecting tank 13 is threadedly installed on the lower end of the purification barrel 1, an upper cover 14 is fixedly installed on the upper end of the purification barrel 1, and the inner cavity of the purification barrel 1 is fixed A support base 2 is connected, a spherical groove 21 is formed on the upper end of the support base 2 from top to bottom, an air outlet 22 is formed on the inner side of the spherical groove 21, and the air outlet 22 is connected to the inner cavity of the exhaust pipe 12. A spherical seat 23 is rotatably installed in the spherical groove 21, and a rotating shaft 24 is symmetrically fixedly connected to the side of the spherical seat 23. The spherical seat 23 is rotatably connected to the support base 2 through the rotating shaft 24, and one of the rotating shafts 24 is driven by a motor shaft of a stepper motor fixedly installed on the side of the purification barrel 1, and filter assemblies are symmetrically installed on the upper and lower ends of the spherical seat 23, and a driving assembly is installed on the upper end of the upper cover 14.

[0025] The motor shaft of the stepper motor rotates half a circle each time, and the motor shaft of the stepper motor drives the rotating shaft 24 to rotate half a circle. The rotating shaft 24 drives the spherical seat 23 to rotate one hundred and eighty degrees, and the spherical seat 23 drives the two filter components to rotate, so that the positions of the two filter components are exchanged with each other, so that the two filter components are used alternately. When one filter component is cleaned or replaced, the other filter component can continue to filter and purify the exhaust gas, thereby continuously purifying and cleaning the exhaust gas.

[0026] Circular cavities 25 are symmetrically provided at the upper and lower ends of the spherical seat 23. Two filter components are symmetrically distributed in the two circular cavities 25. The inner side walls of the two circular cavities 25 are provided with connecting grooves 26. The two connecting grooves 26 are symmetrically distributed up and down. The connecting groove 26 at the upper side is connected with the air outlet 22. When the circular 25 at the lower side rotates to the upper side, the connecting groove 26 on the side of the circular cavity 25 is connected with the air outlet 22. The filter assembly includes a locking mechanism, a shaking filter mechanism and a purification mechanism which are arranged in sequence along the port of the circular cavity 25 toward the bottom. The two shaking filter mechanisms symmetrically distributed above and below are connected through a rotating transmission assembly, and a docking mechanism is installed on the upper end of the shaking filter mechanism on the locking mechanism.

[0027] The two shaking filter mechanisms can rotate synchronously through the set rotating transmission component, and the purification mechanism is sleeved on the rotating transmission component; the docking mechanism is plugged into the rotating transmission component, and the shaking filter mechanism and the rotating transmission component are driven to rotate synchronously through the docking mechanism.

[0028] See also Figure 4 and Figure 7 The rotary transmission assembly includes a transmission shaft 3 installed through the bottom of the circular cavity 25, the transmission shaft 3 is rotatably connected to the spherical seat 23, the two ends of the transmission shaft 3 extend into the two circular grooves 25 respectively, and the two ends of the transmission shaft 3 are symmetrically provided with regular polygonal docking grooves 31, and two annular plates 32 are fixedly sleeved on the transmission shaft 3, and the two annular plates 32 are respectively arranged at the bottom of the two circular cavities 25, and the annular plates 32 are in rotational contact with the bottom of the circular cavity 25, and the transmission shaft 3 can be stably rotated along the spherical seat 23 by the two annular plates 32; The purification mechanism includes a sleeve 33 sleeved on the transmission shaft 3, and a purification plate 34 is fixedly sleeved on the outer side of the sleeve 33. The purification plate 34 is ring-shaped, and the outer side surface of the purification plate 34 contacts the inner wall of the circular cavity 25. One end of the sleeve 33 contacts the annular plate 32, and one end of the shaking filter mechanism contacts the purification mechanism.

[0029] The purification plate 34 does not contact the bottom of the circular cavity 25 , and an annular cavity is formed between the purification plate 34 and the bottom of the circular cavity 25 . The connecting groove 26 is located on the side of the annular cavity. The exhaust gas flows into the annular cavity after being purified by the purification plate 34 , and the purified gas flows outward along the connecting groove 26 .

[0030] See also Figure 4 , Figure 6 and Figure 7The jitter filtering mechanism includes a first regular polygon rod 4 inserted in the regular polygon docking groove 31, and a rotating sleeve 5 and a positioning ring 41 are sequentially sleeved on the first regular polygon rod 4. The positioning ring 41 abuts against the sleeve 33 and the purification plate 34. The positioning ring 41 is fixedly connected to the first regular polygon rod 4. One end of the first regular polygon rod 4 is connected to the docking mechanism. The sleeve 33 and the purification plate 34 are limited by the provided positioning ring 41. A hemispherical driving block 42 is symmetrically fixedly connected to the side of the positioning ring 41 away from the purification plate 34. A first regular polygon groove 51 is penetrated on the rotating sleeve 5, and two limiting rings 52 are fixedly sleeved on the rotating sleeve 5. A filter disc 43 is sleeved between the two limiting rings 52 on the rotating sleeve 5. A through hole is formed through the bottom of the filter disc 43, and the rotating sleeve 5 is rotatably connected to the through hole. A plurality of fan-shaped flow grooves are formed in an annular array at the bottom of the filter disc 43. A reset spring 65 is inserted on one side of the filter disc 43 close to the end of the circular cavity 25, and one end of the reset spring 65 abuts against the locking mechanism. A filter screen 44 is fixedly installed at the bottom of the inner cavity of the filter disc 43. Two limit rings 52 are respectively in rotational contact with the upper and lower sides of the bottom of the filter disc 43. A hemispherical extrusion block 46 is symmetrically fixedly connected to one side of the filter disc 43 close to the positioning ring 41. A cleaning brush 53 is fixedly installed on the side of the rotating sleeve 5 in the inner cavity of the filter disc 43. The cleaning brush 53 is in sliding contact with the filter screen 44, and the hemispherical extrusion blocks 46 and the hemispherical driving blocks 42 are alternately distributed.

[0031] The shaking filter mechanism is installed in the circular cavity 25, the rotating sleeve 5 is slidably connected to the first regular polygonal rod 4, the inner wall of the circular cavity 25 is provided with a plurality of fan-shaped guide grooves 27 in a circular array, the side of the filter plate 43 is fixedly connected with a plurality of fan-shaped blocks 45 in a circular array, the fan-shaped blocks 45 are slidably connected to the fan-shaped guide grooves 27 up and down, and the filter plate 43 is slidably connected to the inner wall of the circular cavity 25 up and down.

[0032] When the first regular polygonal rod 4 rotates, it drives the rotating sleeve 5 and the positioning ring 41 to rotate synchronously. At this time, the rotating sleeve 5 rotates along the bottom of the filter plate 43, and the rotating sleeve 5 drives the two limiting rings 52 to rotate synchronously. The rotating sleeve 5 is always connected to the filter plate 43 by the two limiting rings 52. When the rotating sleeve 5 rotates, it drives the cleaning brush 53 to rotate along the filter screen 44, and the filter screen 44 is cleaned by the cleaning brush 53. When the positioning ring 41 rotates, it drives the hemispherical driving block 42 to rotate. When the hemispherical driving block 42 contacts the hemispherical squeezing block 46, the hemispherical driving block 42 pushes the hemispherical squeezing block 46 to move. The hemispherical squeezing block 46 drives the filter plate 43 to move away from the bottom of the circular groove 25. The filter plate 43 drives the fan-shaped block 45 to slide along the fan-shaped guide groove 27. The filter plate 43 drives the filter screen 44, the rotating sleeve 5, and the cleaning brush 53 to move synchronously. The filter plate 43 squeezes the reset spring 65. When the hemispherical driving block 42 is separated from the hemispherical squeezing block 46, the filter plate 43 is reset under the action of the elastic force of the reset spring 65. The positioning ring 41 continues to rotate, so that the hemispherical driving block 42 and the hemispherical squeezing block 46 are squeezed and contacted and then separated, and this reciprocating process allows the cleaning brush 53 to continuously clean the filter screen 44. At the same time, the filter plate 43 drives the filter screen 44 to shake back and forth up and down, thereby preventing impurities from clogging the filter screen 44.

[0033] See also Figure 2 , Figure 4 and Figure 6 The locking mechanism includes an annular positioning seat 6 installed at the end of the circular cavity 25, a transverse plate 61 is fixedly installed on the inner side of the annular positioning seat 6, and a movable groove 62 is symmetrically opened at the upper end of the transverse plate 61. L-shaped plug plates 63 are slidably installed in the two movable grooves 62. The upper end of the inner cavity of the circular cavity 25 is symmetrically opened with a slot 28. One end of the L-shaped plug plate 63 passes through the transverse plate 61 and the annular positioning seat 6 in sequence and is plugged into the slot 28. The L-shaped plug plate 63 is slidably connected with the transverse plate 61 and the annular positioning seat 6. A first elastic sheet 64 is fixedly installed on the side of the L-shaped plug plate 63. One side of the first elastic sheet 64 abuts against the inner side wall of the movable groove 62. The docking mechanism is installed on the transverse plate 61, and the annular positioning seat 6 abuts against the return spring 65. The first spring piece 64 applies elastic force to the L-shaped plug plate 63 , and under the action of the elastic force of the first spring piece 64 , the end of the L-shaped plug plate 63 is plugged into the slot 28 , so that the annular positioning seat 6 and the circular cavity 25 are relatively fixed, so that the annular positioning seat 6 and the cross plate 61 are fixedly installed on the spherical seat 23 .

[0034] See also Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 The docking mechanism includes a connector 7 rotatably mounted on the horizontal plate 61, a circular groove 71 is provided at one end of the connector 7 away from the horizontal plate 61, and a plurality of slots 72 are provided on the inner wall of the circular groove 71 in a ring array, a synchronous shaft 73 is fixedly connected to one end of the connector 7 close to the horizontal plate 61, one end of the synchronous shaft 73 passes through the horizontal plate 61 and is fixedly sleeved with a synchronous ring 74, the synchronous shaft 73 is rotatably connected to the horizontal plate 61, and the end of the synchronous shaft 73 away from the connector 7 is fixedly connected to the first regular polygonal rod 4.

[0035] The connecting head 7 and the synchronizing ring 74 are symmetrically distributed on both sides of the transverse plate 61, and the connecting head 7 and the synchronizing ring 74 are in rotational contact with the transverse plate 61. The connecting head 7 and the synchronizing ring 74 cooperate to enable the synchronizing shaft 73 to rotate stably along the transverse plate 61; the synchronizing shaft 73 is driven to rotate by the connecting head 7, and the synchronizing shaft 73 drives the first regular polygonal rod 4 to rotate synchronously.

[0036] See also Figure 1 , Figure 2 and Figure 8 A concave plate 15 is fixedly mounted on the upper end of the upper cover 14, and the driving assembly includes a rotating mechanism rotatably mounted on the upper cover 14, and a driving mechanism is installed in the rotating mechanism.

[0037] The rotating mechanism includes a cylinder 8 inserted through the upper cover 14, the cylinder 8 is rotatably connected to the upper cover 14, and a second regular polygonal groove 81 is opened through the upper end of the cylinder 8 from top to bottom. The upper and lower ends of the cylinder 8 are respectively fixedly sleeved with a transmission gear 83 and a connecting ring 82, and the transmission gear 83 and the connecting ring 82 are symmetrically distributed on the upper and lower sides of the upper cover 14. The transmission gear 83 and the connecting ring 82 are respectively in rotational contact with the upper and lower sides of the upper cover 14. The side of the transmission gear 83 is meshed with a driving gear 84. The transmission gear 83 and the driving gear 84 are both installed on the inner side of the concave plate 15. The driving gear 84 is driven by the output shaft of the servo motor fixedly installed on the upper end of the concave plate 15, and the driving mechanism is arranged on the upper cover 14.

[0038] The output shaft of the servo motor drives the driving gear 84 to rotate, the driving gear 84 drives the transmission gear 83 to rotate, the transmission gear 83 drives the cylinder 8 to rotate along the upper cover 14, and the cylinder 8 drives the connecting ring 82 to rotate synchronously. The transmission gear 83 and the connecting ring 82 are arranged to cooperate so that the cylinder 8 can rotate stably.

[0039] The driving mechanism includes a second regular polygonal rod 85 inserted into the second regular polygonal groove 81, a circular block 86 is fixedly connected to the upper end of the second regular polygonal rod 85, and a ring groove 87 is provided on the side of the circular block 86. An electric telescopic rod 88 is fixedly installed on the upper end of the concave plate 15, and a lifting plate 89 is fixedly installed on the upper end of the inner rod of the electric telescopic rod 88. A U-shaped groove 891 is provided at one end of the lifting plate 89, and the U-shaped groove 891 is clamped with the ring groove 87. The lower end of the second regular polygonal rod 85 is fixedly connected to a docking head 9, and a contraction groove 91 is provided on the side of the docking head 9. Convex blocks 92 are symmetrically slidably installed at both ends of the contraction groove 91, and a second spring piece 93 is fixedly installed between the two convex blocks 92, and the lower end of the convex block 92 is sloped.

[0040] The second regular polygon rod 85 is slidably connected to the second regular polygon groove 81 up and down, the annular groove 87 is rotationally contacted with the U-shaped groove 891 , the docking head 9 is plugged into the circular groove 71 , and the convex clamping block 92 is clamped into the clamping groove 72 .

[0041] When the cylinder 8 rotates, it drives the second regular polygonal rod 85 to rotate synchronously, the second regular polygonal rod 85 drives the docking head 9 to rotate, the docking head 9 drives the convex clamping block 92 to rotate, and the convex clamping block 92 drives the connecting head 7 to rotate.

[0042] When the docking head 9 needs to be separated from the connecting head 7, the inner rod of the electric telescopic rod 88 is first extended upward, and the inner rod of the electric telescopic rod 88 drives the lifting plate 89 to move upward, and the lifting plate 89 drives the circular block 86 to move upward, and the circular block 86 drives the second regular polygonal rod 85 to slide upward along the second regular polygonal groove 81, and the second regular polygonal rod 85 drives the docking head 9 to move upward, so that the docking head 9 moves upward out of the circular groove 71.

[0043] When the docking joint 9 needs to be docked with the connector 7, the inner rod of the electric telescopic rod 88 is first retracted downward, and the inner rod of the electric telescopic rod 88 drives the lifting plate 89 to move downward, and the lifting plate 89 drives the circular block 86 and the second regular polygonal rod 85 to move downward, and the second regular polygonal rod 85 drives the docking joint 9 to insert into the circular groove 71, and the docking joint 9 drives the convex block 92 to insert into the circular groove 71; At this time, if the convex block 92 is aligned with the slot 72, the convex block 92 will just fit into the slot 72, thereby completing the connection between the driving mechanism and the docking mechanism; If the convex block 92 is misaligned with the slot 72 at this time, the slope at the lower end of the convex block 92 slides downward along the circular groove 71. At this time, the connector 7 squeezes the convex block 92 to shrink into the shrinkage groove 91, and the convex block 92 squeezes the second elastic piece 93. When the docking head 9 rotates, the docking head 9 drives the convex block 92 to rotate. When the convex block 92 is aligned with the slot 71, the convex block 92 is inserted into the slot 72 under the action of the elastic force of the second elastic piece 93. At this time, the docking head 9 drives the connector 7 to rotate synchronously through the convex block 92.

[0044] Working principle: During operation, the exhaust gas is sent into the upper end of the inner cavity of the purification barrel 1 through the air inlet pipe 11, and the exhaust gas flows downward along the inner cavity of the purification barrel 1 into the circular cavity 25 at the upper end of the spherical seat 23. The exhaust gas flows from top to bottom along the circular cavity 25, and the exhaust gas flows through the filter screen 44 and the purification plate 34 in turn. The impurities in the exhaust gas are first filtered through the filter screen 44, and the filtered exhaust gas is then purified by the purification plate 34. The purified exhaust gas flows out along the connecting groove 26, the air outlet 22, and the exhaust pipe 12, thereby completing the filtering and purification of the exhaust gas.

[0045] When the positions of the two filter assemblies need to be adjusted, the driving mechanism is first separated from the docking mechanism, and the motor shaft of the stepper motor drives the rotating shaft 24 to rotate half a circle, and the rotating shaft 24 drives the spherical seat 23 to rotate one hundred and eighty degrees, and the two filter assemblies are driven to rotate through the spherical seat 23, so that the positions of the two filter assemblies are exchanged with each other, so that the two filter assemblies can be used alternately. When one filter assembly is cleaned or replaced, the other filter assembly can continue to filter and purify the exhaust gas, thereby continuously purifying and cleaning the exhaust gas.

[0046] When the exhaust gas is purified and filtered, the docking mechanism is docked with the driving mechanism. At this time, the output shaft of the servo motor drives the driving gear 84 to rotate, the driving gear 84 drives the transmission gear 83 to rotate, the transmission gear 83 drives the second regular polygon rod 85 to rotate through the cylinder 8, the second regular polygon rod 85 drives the docking head 9 to rotate, the docking head 9 drives the connecting head 7 to rotate through the convex block 92, the connecting head 7 drives the first regular polygon rod 4 to rotate through the synchronous shaft 73, the first regular polygon rod 4 drives the rotating sleeve 5 and the positioning ring 41 to rotate synchronously, and when the rotating sleeve 5 rotates, it drives the cleaning brush 53 to rotate along the filter screen 44, and the filter screen 44 is cleaned by the cleaning brush 53; When the positioning ring 41 rotates, it drives the hemispherical driving block 42 to rotate. When the hemispherical driving block 42 contacts the hemispherical squeezing block 46, the hemispherical driving block 42 pushes the hemispherical squeezing block 46 to move. The hemispherical squeezing block 46 drives the filter plate 43 to move away from the bottom of the circular groove 25. The filter plate 43 drives the fan-shaped block 45 to slide along the fan-shaped guide groove 27. The filter plate 43 drives the filter screen 44, the rotating sleeve 5, and the cleaning brush 53 to move synchronously. At the same time, the filter plate 43 squeezes the reset spring 65. When the hemispherical driving block 42 is separated from the hemispherical squeezing block 46, the filter plate 43 is reset under the action of the elastic force of the reset spring 65. The positioning ring 41 continues to rotate, so that the hemispherical driving block 42 and the hemispherical squeezing block 46 are squeezed and contacted and then separated, and this reciprocating process allows the cleaning brush 53 to continuously clean the filter screen 44. At the same time, the filter plate 43 drives the filter screen 44 to shake back and forth up and down, thereby preventing impurities from clogging the filter screen 44.

[0047] At the same time, the first regular polygonal rod 4 drives the transmission shaft 3 to rotate, and the transmission shaft 3 drives the shaking filter mechanism below to rotate synchronously. At this time, the cleaning brush 53 in the shaking filter mechanism below continuously cleans the filter net 44. At the same time, the filter plate 43 drives the filter net 44 to shake back and forth up and down, thereby cleaning up the impurities on the upper end of the filter net 44. At this time, the impurities will fall down into the dust collecting tank 13 for collection, and the dust collecting tank 13 only needs to be cleaned regularly.

[0048] When it is necessary to replace, repair or further clean the shaking filter mechanism and the purification plate 34, first unscrew the dust collecting tank 13 downward along the purification barrel 1, remove the dust collecting tank 13, and then push the two L-shaped plug plates 63 at the lower end of the spherical seat 23 to make the two L-shaped plug plates 63 approach each other, so that the ends of the two L-shaped plug plates 63 are respectively moved out of the two slots 28, and the locking mechanism can be removed from the circular cavity 25 at the lower end of the spherical seat 23. At the same time, the shaking filter mechanism will be driven to move downward along the circular cavity 25. At this time, the purification plate 34 is moved downward from the circular cavity 25, thereby completing the disassembly of the locking mechanism, the shaking filter mechanism, and the purification plate 34.

[0049] During installation, first install and sleeve the purification plate 34 and the sleeve 33 on the transmission shaft 3, and then insert the first regular polygonal rod 4 in the jitter filter mechanism into the regular polygonal docking groove 31, so that the side of the positioning ring 41 is against the sleeve 33 and the purification plate 34, and at the same time, push the two L-shaped plug plates 63, so that the end of the L-shaped plug plate 63 is received in the annular positioning seat 6, and at the same time, the L-shaped plug plate 63 squeezes the first spring plate 64. When the end of the L-shaped plug plate 63 is aligned with the slot 28, release the push on the L-shaped plug plate 63, and under the action of the elastic force of the first spring plate 64, the end of the L-shaped plug plate 63 is inserted into the slot 28, so that the locking mechanism and the spherical seat 23 are locked, thereby completing the installation of the locking mechanism, the jitter filter mechanism, and the purification plate 34.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laboratory safety exhaust device, comprising a purification barrel (1), characterized in that: An air intake duct (11) and an air exhaust duct (12) are fixedly mounted on the side of the purification barrel (1); the upper and lower ends of the purification barrel (1) are both open; a dust collecting tank (13) is threadedly mounted on the lower end of the purification barrel (1); an upper cover (14) is fixedly mounted on the upper end of the purification barrel (1); a support base (2) is fixedly connected to the inner cavity of the purification barrel (1); a spherical groove (21) is formed through the upper end of the support base (2) from top to bottom; an air outlet (22) is formed through the inner side of the spherical groove (21); and an air outlet (22) is formed through the inner side of the spherical groove (21). The opening (22) is communicated with the inner cavity of the exhaust pipe (12); a spherical seat (23) is rotatably mounted in the spherical groove (21); a rotating shaft (24) is symmetrically fixedly connected to the side of the spherical seat (23); the spherical seat (23) is rotatably connected to the support seat (2) via the rotating shaft (24); one of the rotating shafts (24) is driven by a motor shaft of a stepping motor fixedly mounted on the side of the purification barrel (1); filter assemblies are symmetrically mounted at the upper and lower ends of the spherical seat (23); and a driving assembly is mounted on the upper end of the upper cover (14).

2. A laboratory safety exhaust device according to claim 1, characterized in that: The spherical seat (23) is symmetrically provided with circular cavities (25) at the upper and lower ends, and the inner side walls of the two circular cavities (25) are provided with connecting grooves (26), and the connecting groove (26) at the upper end is connected with the air outlet (22). The filter assembly comprises a locking mechanism, a shaking filter mechanism and a purification mechanism which are arranged in sequence along the port of the circular cavity (25) toward the bottom, and the two shaking filter mechanisms symmetrically distributed above and below are connected via a rotating transmission assembly, and a docking mechanism is installed on the locking mechanism at the upper end of the shaking filter mechanism.

3. A laboratory safety exhaust device according to claim 2, characterized in that: The rotary transmission assembly comprises a transmission shaft (3) which is installed through the bottom of the circular cavity (25), and regular polygonal docking grooves (31) are symmetrically provided at both ends of the transmission shaft (3) in an upper and lower manner. Two annular plates (32) are fixedly sleeved on the transmission shaft (3), and the two annular plates (32) are respectively arranged at the bottoms of the two circular cavities (25), and the annular plates (32) are in rotational contact with the bottoms of the circular cavities (25); The purification mechanism comprises a sleeve (33) sleeved on the transmission shaft (3), a purification plate (34) being fixedly sleeved on the outer side of the sleeve (33), the outer side surface of the purification plate (34) being in contact with the inner side wall of the circular cavity (25), and one end of the shaking filter mechanism being in contact with the purification mechanism.

4. A laboratory safety exhaust device according to claim 3, characterized in that: The jitter filtering mechanism comprises a first regular polygon rod (4) inserted into a regular polygon docking groove (31), a rotating sleeve (5) and a positioning ring (41) being sleeved on the first regular polygon rod (4) in sequence, the positioning ring (41) being in contact with the sleeve (33) and the purification plate (34), the positioning ring (41) being fixedly connected to the first regular polygon rod (4), one end of the first regular polygon rod (4) being connected to the docking mechanism, a hemispherical driving block (42) being symmetrically fixedly connected to one side of the positioning ring (41) away from the purification plate (34), the first regular polygon groove (51) being penetrated through the rotating sleeve (5), two limiting rings (52) being fixedly sleeved on the rotating sleeve (5), A filter disc (43) is sleeved between two limiting rings (52) on the rotating sleeve (5), a return spring (65) is inserted into one side of the filter disc (43) close to the end of the circular cavity (25), one end of the return spring (65) is in contact with the locking mechanism, a filter screen (44) is fixedly mounted at the bottom of the inner cavity of the filter disc (43), the two limiting rings (52) are respectively in rotational contact with the upper and lower sides of the bottom of the filter disc (43), a hemispherical extrusion block (46) is symmetrically fixedly connected to one side of the filter disc (43) close to the positioning ring (41), a cleaning brush (53) is fixedly mounted on the side of the rotating sleeve (5) in the inner cavity of the filter disc (43), and the cleaning brush (53) is in sliding contact with the filter screen (44).

5. A laboratory safety exhaust device according to claim 4, characterized in that: The shaking filter mechanism is installed in the circular cavity (25), the rotating sleeve (5) is slidably connected to the first regular polygonal rod (4), the inner side wall of the circular cavity (25) is provided with a plurality of fan-shaped guide grooves (27) in an annular array, the side surface of the filter plate (43) is fixedly connected with a plurality of fan-shaped blocks (45) in an annular array, the fan-shaped blocks (45) are slidably connected to the fan-shaped guide grooves (27) up and down, and the filter plate (43) is slidably connected to the inner side wall of the circular cavity (25) up and down.

6. A laboratory safety exhaust device according to claim 4, characterized in that: The locking mechanism comprises an annular positioning seat (6) mounted at the end of the circular cavity (25), a transverse plate (61) being fixedly mounted on the inner side of the annular positioning seat (6), a movable groove (62) being symmetrically provided at the upper end of the transverse plate (61), an L-shaped plug plate (63) being slidably mounted in both movable grooves (62), a slot (28) being symmetrically provided at the upper end of the inner cavity of the circular cavity (25), one end of the L-shaped plug plate (63) passing through the transverse plate (61) and the annular positioning seat (6) in sequence and plugged into the slot (28), the L-shaped plug plate (63) being slidably connected to the transverse plate (61) and the annular positioning seat (6), a first spring sheet (64) being fixedly mounted on the side of the L-shaped plug plate (63), one side of the first spring sheet (64) being in contact with the inner side wall of the movable groove (62), the docking mechanism being mounted on the transverse plate (61), and the annular positioning seat (6) being in contact with the return spring (65); The docking mechanism comprises a connector (7) rotatably mounted on the transverse plate (61); a circular groove (71) is formed at one end of the connector (7) away from the transverse plate (61); a plurality of slots (72) are formed in a circular array on the inner side wall of the circular groove (71); a synchronous shaft (73) is fixedly connected to one end of the connector (7) close to the transverse plate (61); one end of the synchronous shaft (73) penetrates the transverse plate (61) and is fixedly sleeved with a synchronous ring (74); the synchronous shaft (73) is rotatably connected to the transverse plate (61); and one end of the synchronous shaft (73) away from the connector (7) is fixedly connected to the first regular polygonal rod (4).

7. A laboratory safety exhaust device according to claim 1, characterized in that: A concave plate (15) is fixedly mounted on the upper end of the upper cover (14), and the driving assembly comprises a rotating mechanism rotatably mounted on the upper cover (14), wherein a driving mechanism is mounted inside the rotating mechanism.

8. A laboratory safety exhaust device according to claim 7, characterized in that: The rotating mechanism comprises a cylinder (8) inserted through the upper cover (14), the cylinder (8) being rotatably connected to the upper cover (14), a second regular polygonal groove (81) being formed through the upper end of the cylinder (8) from top to bottom, a transmission gear (83) and a connecting ring (82) being fixedly sleeved at the upper and lower ends of the cylinder (8), respectively, and the transmission gear (83) and the connecting ring (82) are symmetrically distributed on the upper and lower sides of the upper cover (14), a driving gear (84) is meshed on the side surface of the transmission gear (83), and the driving gear (84) is driven by the output shaft of a servo motor fixedly mounted on the upper end of the concave plate (15), and the driving mechanism is arranged on the upper cover (14).

9. A laboratory safety exhaust device according to claim 8, characterized in that: The driving mechanism comprises a second regular polygon rod (85) inserted into the second regular polygon groove (81); a circular block (86) is fixedly connected to the upper end of the second regular polygon rod (85); a circular groove (87) is provided on the side of the circular block (86); an electric telescopic rod (88) is fixedly mounted on the upper end of the concave plate (15); a lifting plate (89) is fixedly mounted on the upper end of the inner rod of the electric telescopic rod (88); a U-shaped groove (891) is provided at one end of the lifting plate (89); the U-shaped groove (891) is engaged with the circular groove (87); a butt joint (9) is fixedly connected to the lower end of the second regular polygon rod (85); a contraction groove (91) is provided on the side of the butt joint (9); convex clamping blocks (92) are symmetrically slidably mounted at both ends of the contraction groove (91); a second spring piece (93) is fixedly mounted between the two convex clamping blocks (92); and the lower end of the convex clamping block (92) is a sloped surface.

10. A laboratory safety exhaust device according to claim 9, characterized in that: The second regular polygonal rod (85) is slidably connected to the second regular polygonal groove (81) up and down, the annular groove (87) is in rotational contact with the U-shaped groove (891), the docking head (9) is plugged into the circular groove (71), and the convex clamping block (92) is clamped into the clamping groove (72).

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